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1

Developing an approach utilizing local deterministic analysis to predict the cycle friction of the piston ring-pack in internal combustion engines  

E-Print Network (OSTI)

Nowadays, a rapid growth of internal combustion (IC) engines is considered to be a major contributor to energy crisis. About 20% of the mechanical loss in internal combustion engines directly goes to the friction loss ...

Liu, Yang, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

2

INTERNAL FRICTION TO BERYLLIUM  

SciTech Connect

The internal friction in Be wire specimens was measured using a simple, inverted, torsional-pendulum system. Temperatures at liquid nitrogen to 735 deg C at a frequency of about 1 cps were used. (R.E.U.)

Ang, C.; Kamber, K.T.

1963-11-01T23:59:59.000Z

3

REDUCED ENGINE FRICTION AND WEAR  

DOE Green Energy (OSTI)

This Final Technical Report discusses the progress was made on the experimental and numerical tasks over the duration of this project regarding a new technique for decreasing engine friction and wear via liner rotation. The experimental subtasks involved quantifying the reduction in engine friction for a prototype rotating liner engine relative to a comparable baseline engine. Both engine were single cylinder conversions of nominally identical production four-cylinder engines. Hot motoring tests were conducted initially and revealed that liner rotation decreased engine friction by 20% under motoring conditions. A well-established model was used to estimate that liner rotation should decrease the friction of a four-cylinder engine by 40% under hot motoring conditions. Hot motoring tear-down tests revealed that the crankshaft and valve train frictional losses were essentially the same for the two engines, as expected. However, the rotating liner engine had much lower (>70%) piston assembly friction compared to the conventional engine. Finally, we used the Instantaneous IMEP method to compare the crank-angle resolved piston assembly friction for the two engines. Under hot motoring conditions, these measurements revealed a significant reduction in piston assembly friction, especially in the vicinity of compression TDC when the lubrication regime transitions from hydrodynamic through mixed and into boundary friction. We have some remaining problems with these measurements that we expect to solve during the next few weeks. We will then perform these measurements under firing conditions. We also proposed to improve the state-of-the-art of numerical modeling of piston assembly friction for conventional engines and then to extend this model to rotating liner engines. Our research team first modeled a single ring in the Purdue ring-liner test rig. Our model showed good agreement with the test rig data for a range of speeds and loads. We then modeled a complete piston assembly in an engine. The model appears to produce the correct behavior, but we cannot quantify its strengths or weaknesses until our crank-angle-resolved measurements have been completed. Finally, we proposed and implemented a model for the effects of liner rotation on piston assembly friction. Here, we propose that the rotating liner design is analogous to the shaft-bushing mechanism. Therefore, we used the side-slip rolling friction model to simulate the effects of liner rotation. This model appears to be promising, but final analysis of its strengths and/or weaknesses must await our crank-angle-resolved measurements.

Ron Matthews

2005-05-01T23:59:59.000Z

4

Instantaneous engine frictional torque, its components and piston assembly friction  

DOE Green Energy (OSTI)

The overall goal of this report is to document the work done to determine the instantaneous frictional torque of internal combustion engine by using a new approach known as (P-[omega]) method developed at Wayne State University. The emphasis has been to improve the accuracy of the method, and apply it to both diesel and gasoline engines under different operating conditions. Also work included an investigation to determine the effect of using advanced materials and techniques to coat the piston rings on the instantaneous engine frictional torque and the piston assembly friction. The errors in measuring the angular velocity, [omega], have been determined and found to be caused by variations in the divisions within one encoder, encoder-to-encoder variations, misalignment within the encoder itself and misalignment between the encoder and crankshaft. The errors in measuring the cylinder gas pressure, P, have been determined and found to be caused by transducer-to-transducer variations, zero drift, thermal stresses and lack of linearity. The ability of the (P-[omega]) method in determining the frictional torque of many engine components has been demonstrated. These components include valve train, fuel injection pump with and without fuel injection, and piston with and without different ring combinations. The emphasis in this part of the research program has been on the piston-ring assembly friction. The effects of load and other operating variables on IFT have been determined. The motoring test, which is widely used in industry to measure engine friction has been found to be inaccurate. The errors have been determined at different loads.

Nichols, F.A. (ed.) (Argonne National Lab., IL (United States)); Henein, N.A. (Wayne State Univ., Detroit, MI (United States). Center for Automotive Research)

1992-05-01T23:59:59.000Z

5

REDUCED ENGINE FRICTION AND WEAR  

DOE Green Energy (OSTI)

Progress was made on experimental and numerical subtasks during the second 6-month period of this project. One of the experimental subtasks scheduled for completion during the first 6 months was delayed due to a delay in receiving the prototype RLE face seal from the vendor. This component was acquired and testing was completed during the second 6 months. The test results indicate that this face seal fulfills the engineering objectives. The other experimental subtask scheduled for completion during the second 6-month period was final assembly of the prototype rotating liner engine. This subtask was completed on schedule. No results from this subtask were scheduled for this reporting period. One numerical subtask, development of the governing equations, was scheduled for completion during the first 6-month period but was completed during the second 6 months. However, we expect to re-explore these as we learn more throughout the course of the project. Two other numerical subtasks were scheduled to begin during the second 6 months: formulating the numerical equations governing piston assembly friction and coding/testing the resulting model. These subtasks were not scheduled for completion during this reporting period. Satisfactory progress was made.

Ron Matthews

2003-07-08T23:59:59.000Z

6

Instantaneous engine frictional torque, its components and piston assembly friction. Final report  

DOE Green Energy (OSTI)

The overall goal of this report is to document the work done to determine the instantaneous frictional torque of internal combustion engine by using a new approach known as (P-{omega}) method developed at Wayne State University. The emphasis has been to improve the accuracy of the method, and apply it to both diesel and gasoline engines under different operating conditions. Also work included an investigation to determine the effect of using advanced materials and techniques to coat the piston rings on the instantaneous engine frictional torque and the piston assembly friction. The errors in measuring the angular velocity, {omega}, have been determined and found to be caused by variations in the divisions within one encoder, encoder-to-encoder variations, misalignment within the encoder itself and misalignment between the encoder and crankshaft. The errors in measuring the cylinder gas pressure, P, have been determined and found to be caused by transducer-to-transducer variations, zero drift, thermal stresses and lack of linearity. The ability of the (P-{omega}) method in determining the frictional torque of many engine components has been demonstrated. These components include valve train, fuel injection pump with and without fuel injection, and piston with and without different ring combinations. The emphasis in this part of the research program has been on the piston-ring assembly friction. The effects of load and other operating variables on IFT have been determined. The motoring test, which is widely used in industry to measure engine friction has been found to be inaccurate. The errors have been determined at different loads.

Nichols, F.A. [ed.] [Argonne National Lab., IL (United States); Henein, N.A. [Wayne State Univ., Detroit, MI (United States). Center for Automotive Research

1992-05-01T23:59:59.000Z

7

EVALUATION OF A LOW FRICTION - HIGH EFFICIENCY ROLLER BEARING ENGINE  

SciTech Connect

This Low Friction (High Efficiency Roller Bearing) Engine (LFE) report presents the work done by The Timken Company to conduct a technology demonstration of the benefits of replacing hydrodynamic bearings with roller bearings in the crankshaft and camshaft assemblies of an internal combustion engine for the purpose of collecting data sufficient to prove merit. The engines in the present study have been more extensively converted to roller bearings than any previous studies (40 needle roller bearings per engine) to gain understanding of the full potential of application of bearing technology. The project plan called for comparative testing of a production vehicle which was already respected for having demonstrated low engine friction levels with a rollerized version of that engine. Testing was to include industry standard tests for friction, emissions and fuel efficiency conducted on instrumented dynamometers. Additional tests for fuel efficiency, cold start resistance and other measures of performance were to be made in the actual vehicle. Comparative measurements of noise, vibration and harshness (NVH), were planned, although any work to mitigate the suspected higher NVH level in the rollerized engine was beyond the scope of this project. Timken selected the Toyota Avalon with a 3.5L V-6 engine as the test vehicle. In an attempt to minimize cost and fabrication time, a ‘made-from’ approach was proposed in which as many parts as possible would be used or modified from production parts to create the rollerized engine. Timken commissioned its test partner, FEV Engine Technology, to do a feasibility study in which they confirmed that using such an approach was possible to meet the required dimensional restrictions and tolerances. In designing the roller bearing systems for the crank and cam trains, Timken utilized as many production engine parts as possible. The crankshafts were produced from production line forgings, which use Timken steel, modified with special machining and heat treatment. Timken designed and manufactured all of the roller bearing related components such as the thrust bearing package. The production connecting rods and camshafts could not be used for the roller bearing engine, so new ones were produced according to the team’s designs using Timken steel. The remaining miscellaneous components were designed and procured by FEV. Timken prepared a display version of the crankshaft portion of the production engine without connecting rods which could be driven by a motor through a cogged-belt and electrically actuated clutch arrangement. A modified version was also made in which the engine was outfitted with roller bearings on the main bearing positions. Preliminary tests showed that the rollerized engine was running with 1/3 less friction than the standard display engine. Additional friction testing and noise characterization was cut short because of shipping damage to the rollerized engine display and because of other project priorities. The team did successfully demonstrate the ability to package roller bearings satisfactorily in numerous locations in a typical automotive engine. The scope of this project did not include durability demonstration and that subject would have to be addressed in any follow-on work. In the actual test phase, the rollerized engine did show significantly less friction in motored dynamometer tests compared to its production equivalent. The 5-10% improvement measured in this study was about half that seen in other studies. However, the fired test results did not show a reduction in friction which did not match prior experience or expectations. Subsequent teardown and inspection of the rollerized engine revealed potential sources of excessive friction in the experimental application. These features would be eliminated in a design not based on modification of production parts. The team is confident (based on experience) that friction reduction would be realized with proper modifications.

Kolarik, Robert V. II; Shattuck, Charles W.; Copper, Anthony P.

2009-06-30T23:59:59.000Z

8

Factors affecting piston ring friction  

E-Print Network (OSTI)

The piston ring pack friction is a major contributor to the internal combustion engine mechanical friction loss. The oil control ring decides the oil supply to the top two rings in addition to being the major friction ...

Liao, Kai, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

9

LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES  

SciTech Connect

This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston/ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and emissions. A detailed set of piston/ring dynamic and friction models have been developed and applied that illustrated the fundamental relationships between design parameters and friction losses. Various low-friction strategies and concepts have been explored, and engine experiments will validate these concepts. An iterative process of experimentation, simulation and analysis, will be followed with the goal of demonstrating a complete optimized low-friction engine system. As planned, MIT has developed guidelines for an initial set of low-friction piston-ring-pack designs. Current recommendations focus on subtle top-piston-ring and oil-control-ring characteristics. A full-scale Waukesha F18 engine has been installed at Colorado State University and testing of the baseline configuration is in progress. Components for the first design iteration are being procured. Subsequent work includes examining the friction and engine performance data and extending the analyses to other areas to evaluate opportunities for further friction improvement and the impact on oil consumption/emission and wear, towards demonstrating an optimized reduced-friction engine system.

Victor W. Wong; Tian Tian; Grant Smedley

2003-08-28T23:59:59.000Z

10

LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES  

Science Conference Proceedings (OSTI)

This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston and piston ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and wear. An iterative process of simulation, experimentation and analysis is being followed towards achieving the goal of demonstrating a complete optimized low-friction engine system. To date, a detailed set of piston and piston-ring dynamic and friction models have been developed and applied that illustrate the fundamental relationships among mechanical, surface/material and lubricant design parameters and friction losses. Demonstration of low-friction ring-pack designs in the Waukesha VGF 18GL engine confirmed total engine FEMP (friction mean effective pressure) reduction of 7-10% from the baseline configuration without significantly increasing oil consumption or blow-by flow. This represents a substantial (30-40%) reduction of the ringpack friction alone. The measured FMEP reductions were in good agreement with the model predictions. Further improvements via piston, lubricant, and surface designs offer additional opportunities. Tests of low-friction lubricants are in progress and preliminary results are very promising. The combined analysis of lubricant and surface design indicates that low-viscosity lubricants can be very effective in reducing friction, subject to component wear for extremely thin oils, which can be mitigated with further lubricant formulation and/or engineered surfaces. Hence a combined approach of lubricant design and appropriate wear reduction offers improved potential for minimum engine friction loss. Piston friction studies indicate that a flatter piston with a more flexible skirt, together with optimizing the waviness and film thickness on the piston skirt offer significant friction reduction. Combined with low-friction ring-pack, material and lubricant parameters, a total power cylinder friction reduction of 30-50% is expected, translating to an engine efficiency increase of two percentage points from its current baseline towards the goal of 50% ARES engine efficiency. The design strategies developed in this study have promising potential for application in all modern reciprocating engines as they represent simple, low-cost methods to extract significant fuel savings. The current program has possible spinoffs and applications in other industries as well, including transportation, CHP, and diesel power generation. The progress made in this program has wide engine efficiency implications, and potential deployment of low-friction engine components or lubricants in the near term is possible as current investigations continue.

Victor Wong; Tian Tian; Luke Moughon; Rosalind Takata; Jeffrey Jocsak

2006-03-31T23:59:59.000Z

11

Internal combustion engine  

SciTech Connect

An improvement to an internal combustion engine is disclosed that has a fuel system for feeding a fuel-air mixture to the combustion chambers and an electrical generation system, such as an alternator. An electrolytic cell is attached adjacent to the engine to generate hydrogen and oxygen upon the application of a voltage between the cathode and anode of the electrolytic cell. The gas feed connects the electrolytic cell to the engine fuel system for feeding the hydrogen and oxygen to the engine combustion chambers. Improvements include placing the electrolytic cell under a predetermined pressure to prevent the electrolyte from boiling off, a cooling system for the electrolytic cell and safety features.

Valdespino, J.M.

1981-06-09T23:59:59.000Z

12

LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES  

Science Conference Proceedings (OSTI)

This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston and piston ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and wear. An iterative process of simulation, experimentation and analysis is being followed towards achieving the goal of demonstrating a complete optimized low-friction engine system. To date, a detailed set of piston and piston-ring dynamic and friction models have been developed and applied that illustrate the fundamental relationships between design parameters and friction losses. Low friction ring designs have already been recommended in a previous phase, with full-scale engine validation partially completed. Current accomplishments include the addition of several additional power cylinder design areas to the overall system analysis. These include analyses of lubricant and cylinder surface finish and a parametric study of piston design. The Waukesha engine was found to be already well optimized in the areas of lubricant, surface skewness and honing cross-hatch angle, where friction reductions of 12% for lubricant, and 5% for surface characteristics, are projected. For the piston, a friction reduction of up to 50% may be possible by controlling waviness alone, while additional friction reductions are expected when other parameters are optimized. A total power cylinder friction reduction of 30-50% is expected, translating to an engine efficiency increase of two percentage points from its current baseline towards the goal of 50% efficiency. Key elements of the continuing work include further analysis and optimization of the engine piston design, in-engine testing of recommended lubricant and surface designs, design iteration and optimization of previously recommended technologies, and full-engine testing of a complete, optimized, low-friction power cylinder system.

Victor Wong; Tian Tian; Luke Moughon; Rosalind Takata; Jeffrey Jocsak

2005-09-30T23:59:59.000Z

13

Modeling the effect of engine assembly mass on engine friction and vehicle fuel economy  

DOE Green Energy (OSTI)

In this paper, an analytical model is developed to estimate the impact of reducing engine assembly mass (the term engine assembly refers to the moving components of the engine system, including crankshafts, valve train, pistons, and connecting rods) on engine friction and vehicle fuel economy. The relative changes in frictional mean effective pressure and fuel economy are proportional to the relative change in assembly mass. These changes increase rapidly as engine speed increases. Based on the model, a 25% reduction in engine assembly mass results in a 2% fuel economy improvement for a typical mid-size passenger car over the EPA Urban and Highway Driving Cycles.

An, Feng [University of California, Riverside, CA (United States); Stodolsky, F. [Argonne National Lab., IL (United States)

1995-06-01T23:59:59.000Z

14

Low-Engine-Friction Technology for Advanced Natural-Gas Reciprocating Engines  

SciTech Connect

This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston and piston ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and wear. An iterative process of simulation, experimentation and analysis has been followed towards achieving the goal of demonstrating a complete optimized low-friction engine system. In this program, a detailed set of piston and piston-ring dynamic and friction models have been adapted and applied that illustrate the fundamental relationships among mechanical, surface/material and lubricant design parameters and friction losses. Demonstration of low-friction ring-pack designs in the Waukesha VGF 18GL engine confirmed ring-pack friction reduction of 30-40%, which translates to total engine FEMP (friction mean effective pressure) reduction of 7-10% from the baseline configuration without significantly increasing oil consumption or blow-by flow. The study on surface textures, including roughness characteristics, cross hatch patterns, dimples and grooves have shown that even relatively small-scale changes can have a large effect on ring/liner friction, in some cases reducing FMEP by as much as 30% from a smooth surface case. The measured FMEP reductions were in good agreement with the model predictions. The combined analysis of lubricant and surface design indicates that low-viscosity lubricants can be very effective in reducing friction, subject to component wear for extremely thin oils, which can be mitigated with further lubricant formulation and/or engineered surfaces. Hence a combined approach of lubricant design and appropriate wear reduction offers improved potential for minimum engine friction loss. Testing of low-friction lubricants showed that total engine FMEP reduced by up to {approx}16.5% from the commercial reference oil without significantly increasing oil consumption or blow-by flow. Piston friction studies indicate that a flatter piston with a more flexible skirt, together with optimizing the waviness and film thickness on the piston skirt offer significant friction reduction. Combined with low-friction ring-pack, material and lubricant parameters, a total power cylinder friction reduction of 30-50% is expected, translating to an engine efficiency increase of two percentage points from its current baseline towards the goal of 50% ARES engine efficiency. The design strategies developed in this study have promising potential for application in all modern reciprocating engines as they represent simple, low-cost methods to extract significant fuel savings. The current program has possible spinoffs and applications in other industries as well, including transportation, CHP, and diesel power generation. The progress made in this program has wide engine efficiency implications, and potential deployment of low-friction engine components or lubricants in the near term is quite possible.

Victor Wong; Tian Tian; G. Smedley; L. Moughon; Rosalind Takata; J. Jocsak

2006-11-30T23:59:59.000Z

15

LOW-ENGINE-FRICTION TECHNOLOGY FOR ADVANCED NATURAL-GAS RECIPROCATING ENGINES  

Science Conference Proceedings (OSTI)

This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston/ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and emissions. An iterative process of simulation, experimentation and analysis, are being followed towards achieving the goal of demonstrating a complete optimized low-friction engine system. To date, a detailed set of piston/ring dynamic and friction models have been developed and applied that illustrated the fundamental relationships between design parameters and friction losses. Various low-friction strategies and ring-design concepts have been explored, and engine experiments have been done on a full-scale Waukesha VGF F18 in-line 6 cylinder power generation engine rated at 370 kW at 1800 rpm. Current accomplishments include designing and testing ring-packs using a subtle top-compression-ring profile (skewed barrel design), lowering the tension of the oil-control ring, employing a negative twist to the scraper ring to control oil consumption. Initial test data indicate that piston ring-pack friction was reduced by 35% by lowering the oil-control ring tension alone, which corresponds to a 1.5% improvement in fuel efficiency. Although small in magnitude, this improvement represents a first step towards anticipated aggregate improvements from other strategies. Other ring-pack design strategies to lower friction have been identified, including reduced axial distance between the top two rings, tilted top-ring groove. Some of these configurations have been tested and some await further evaluation. Colorado State University performed the tests and Waukesha Engine Dresser, Inc. provided technical support. Key elements of the continuing work include optimizing the engine piston design, application of surface and material developments in conjunction with improved lubricant properties, system modeling and analysis, and continued technology demonstration in an actual full-sized reciprocating natural-gas engine.

Victor W. Wong; Tian Tian; Grant Smedley; Jeffrey Jocsak

2004-09-30T23:59:59.000Z

16

Department of Mechanical and Nuclear Engineering Spring 2012 Heavy-Duty Diesel Engine Friction Reduction Testing and Analysis  

E-Print Network (OSTI)

PENNSTATE Department of Mechanical and Nuclear Engineering Spring 2012 Heavy-Duty Diesel Engine Friction Reduction Testing and Analysis Overview Volvo Group Powertrain Engineering is interested in increasing fuel efficiency through the reduction of parasitic friction and pumping losses. A test cell

Demirel, Melik C.

17

Effects of lubricant viscosity and surface texturing on ring-pack performance in internal combustion engines  

E-Print Network (OSTI)

The piston ring-pack contributes approximately 25% of the mechanical losses in an internal combustion engine. Both lubricant viscosity and surface texturing were investigated in an effort to reduce this ring-pack friction ...

Takata, Rosalind (Rosalind Kazuko), 1978-

2006-01-01T23:59:59.000Z

18

Modeling the structural behavior of the piston rings under different boundary conditions in internal combustion engines  

E-Print Network (OSTI)

In the process of designing internal combustion engine, piston ring plays an important role in fulfilling the requirements of camber gas sealing, friction reduction and lubrication oil consumption. The goal of this thesis ...

Xu, Dian

2010-01-01T23:59:59.000Z

19

Elastic Properties and Internal Friction of Two Magnesium Alloys at Elevated Temperatures  

SciTech Connect

The elastic properties and internal friction of two magnesium alloys were studied from 25 C to 450 C using Resonant Ultrasound Spectroscopy (RUS). The Young's moduli decrease with increasing temperature. At 200 C, a change in the temperature dependence of the elastic constants is observed. The internal friction increases significantly with increasing temperature above 200 C. The observed changes in the temperature dependence of the elastic constants and the internal friction are the result of anelastic relaxation by grain boundary sliding at elevated temperatures. Elastic properties govern the behavior of a materials subjected to stress over a region of strain where the material behaves elastically. The elastic properties, including the Young's modulus (E), shear modulus (G), bulk modulus (B), and Poisson's ratio (?), are of significant interest to many design and engineering applications. The choice of the most appropriate material for a particular application at elevated temperatures therefore requires knowledge of its elastic properties as a function of temperature. In addition, mechanical vibration can cause significant damage in the automotive, aerospace, and architectural industries and thus, the ability of a material to dissipate elastic strain energy in materials, known as damping or internal friction, is also important property. Internal friction can be the result of a wide range of physical mechanisms, and depends on the material, temperature, and frequency of the loading. When utilized effectively in engineering applications, the damping capacity of a material can remove undesirable noise and vibration as heat to the surroundings. The elastic properties of materials can be determined by static or dynamic methods. Resonant Ultrasound Spectroscopy (RUS), used in this study, is a unique and sophisticated non-destructive dynamic technique for determining the complete elastic tensor of a solid by measuring the resonant spectrum of mechanical resonance for a sample of known geometry, dimensions, and mass. In addition, RUS allows determination of internal friction, or damping, at different frequencies and temperatures. Polycrystalline pure magnesium (Mg) exhibits excellent high damping properties. However, the poor mechanical properties limit the applications of pure Mg. Although alloying can improve the mechanical properties of Mg, the damping properties are reduced with additions of alloying elements. Therefore, it becomes necessary to study and develop Mg-alloys with simultaneous high damping capacity and improved mechanical properties. Moreover, studies involving the high temperature dynamic elastic properties of Mg alloys are limited. In this study, the elastic properties and internal friction of two magnesium alloys were studied at elevated temperatures using RUS. The effect of alloy composition and grain size was investigated. The wrought magnesium alloys AZ31 and ZK60 were employed. Table 1 gives the nominal chemical compositions of these two alloys. The ZK60 alloy is a commercial extruded plate with a T5 temper, i.e. solution-treated at 535 C for two hours, quenched in hot water, and aged at 185 C for 24 hours. The AZ31 alloy is a commercial rolled plate with a H24 temper, i.e. strain hardened and partially annealed.

Freels, M.; Liaw, P. K.; Garlea, E.; Morrell, J. S.; Radiovic, M.

2011-06-01T23:59:59.000Z

20

Internal combustion engine  

DOE Patents (OSTI)

An improved engine is provided that more efficiently consumes difficult fuels such as coal slurries or powdered coal. The engine includes a precombustion chamber having a portion thereof formed by an ignition plug. The precombustion chamber is arranged so that when the piston is proximate the head, the precombustion chamber is sealed from the main cylinder or the main combustion chamber and when the piston is remote from the head, the precombustion chamber and main combustion chamber are in communication. The time for burning of fuel in the precombustion chamber can be regulated by the distance required to move the piston from the top dead center position to the position wherein the precombustion chamber and main combustion chamber are in communication.

Baker, Quentin A. (P.O. Box 6477, San Antonio, TX 78209); Mecredy, Henry E. (1630-C W. 6th, Austin, TX 78703); O' Neal, Glenn B. (6503 Wagner Way, San Antonio, TX 78256)

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

ENGINEERING InternatIonal  

E-Print Network (OSTI)

and multilateral, for example, the asian development Bank, International atomic energy agency (united nations and the Sydney cBd, our city campus is easily accessible by bus and train. close to cosmopolitan inner-city suburbs such as glebe, Surry Hills and darling Harbour, the city campus is surrounded by places to shop

University of Technology, Sydney

22

Ynfiniti Engineering Services International | Open Energy Information  

Open Energy Info (EERE)

Ynfiniti Engineering Services International Ynfiniti Engineering Services International Jump to: navigation, search Name Ynfiniti Engineering Services International Place Spain Sector Solar, Wind energy Product Company that specializes in the installation and maintenance of wind farms and solar plants. References Ynfiniti Engineering Services International[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Ynfiniti Engineering Services International is a company located in Spain . References ↑ "Ynfiniti Engineering Services International" Retrieved from "http://en.openei.org/w/index.php?title=Ynfiniti_Engineering_Services_International&oldid=353364" Categories: Clean Energy Organizations

23

Intern Programs | Italian SSSA Engineering Graduate Students  

NLE Websites -- All DOE Office Websites (Extended Search)

summer internships to outstanding graduate engineering students. In this comprehensive program interns work with scientists or engineers on projects related to Fermilab's...

24

An Analytic Theory on How Friction Affects Free Internal Waves in the Equatorial Waveguide  

Science Conference Proceedings (OSTI)

We study theoretically the effects of linear (Rayleigh) friction on free internal waves in the equatorial wayeguide. The waves may be vertically propagating or in standing vertical modes. Analytic solutions on a beta-plane show that the ...

Harold O. Mofjeld

1981-11-01T23:59:59.000Z

25

Low emission internal combustion engine  

DOE Patents (OSTI)

A low emission, internal combustion compression ignition engine having a cylinder, a piston movable in the cylinder and a pre-combustion chamber communicating with the cylinder near the top thereof and in which low emissions of NO.sub.x are achieved by constructing the pre-combustion chamber to have a volume of between 70% and 85% of the combined pre-chamber and main combustion chamber volume when the piston is at top dead center and by variably controlling the initiation of fuel injection into the pre-combustion chamber.

Karaba, Albert M. (Muskegon, MI)

1979-01-01T23:59:59.000Z

26

Carburetor for internal combustion engines  

DOE Patents (OSTI)

A carburetor for internal combustion engines having a housing including a generally discoidal wall and a hub extending axially from the central portion thereof, an air valve having a relatively flat radially extending surface directed toward and concentric with said discoidal wall and with a central conoidal portion having its apex directed toward the interior of said hub portion. The housing wall and the radially extending surface of the valve define an air passage converging radially inwardly to form an annular valving construction and thence diverge into the interior of said hub. The hub includes an annular fuel passage terminating at its upper end in a circumferential series of micro-passages for directing liquid fuel uniformly distributed into said air passage substantially at said valving constriction at right angles to the direction of air flow. The air valve is adjustable axially toward and away from the discoidal wall of the carburetor housing to regulate the volume of air drawn into the engine with which said carburetor is associated. Fuel is delivered under pressure to the fuel metering valve and from there through said micro-passages and controlled cams simultaneously regulate the axial adjustment of said air valve and the rate of delivery of fuel through said micro-passages according to a predetermined ratio pattern. A third jointly controlled cam simultaneously regulates the ignition timing in accordance with various air and fuel supply settings. The air valve, fuel supply and ignition timing settings are all independent of the existing degree of engine vacuum.

Csonka, John J. (625 Linwood Ave., Buffalo, NY 14209); Csonka, Albert B. (109 Larchmont Rd., Buffalo, NY 14214)

1978-01-01T23:59:59.000Z

27

Free Energy and Internal Combustion Engine Cycles  

E-Print Network (OSTI)

The performance of one type (Carnot) of Internal Combustion Engine (ICE) cycle is analyzed within the framework of thermodynamic free energies. ICE performance is different from that of an External Combustion Engine (ECE) which is dictated by Carnot's rule.

Harris, William D

2012-01-01T23:59:59.000Z

28

Internal combustion engine and method for control  

SciTech Connect

In one exemplary embodiment of the invention an internal combustion engine includes a piston disposed in a cylinder, a valve configured to control flow of air into the cylinder and an actuator coupled to the valve to control a position of the valve. The internal combustion engine also includes a controller coupled to the actuator, wherein the controller is configured to close the valve when an uncontrolled condition for the internal engine is determined.

Brennan, Daniel G

2013-05-21T23:59:59.000Z

29

Starting apparatus for internal combustion engines  

DOE Patents (OSTI)

This report is a patent description for a system to start an internal combustion engine. Remote starting and starting by hearing impaired persons are addressed. The system monitors the amount of current being drawn by the starter motor to determine when the engine is started. When the engine is started the system automatically deactivates the starter motor. Five figures are included.

Dyches, G.M.; Dudar, A.M.

1995-01-01T23:59:59.000Z

30

Modeling the performance of the piston ring-pack with consideration of non-axisymmetric characteristics of the power cylinder system in internal combustion engines  

E-Print Network (OSTI)

The performance of the piston ring-pack is directly associated with the friction, oil consumption, wear, and blow-by in internal combustion engines. Because of non-axisymmetric characteristics of the power cylinder system, ...

Liu, Liang, 1971-

2005-01-01T23:59:59.000Z

31

International Governance of Climate Engineering  

E-Print Network (OSTI)

Solar Radiation Management Governance Initiative conference); Daniel Bodansky, Governing Climate Engineering: Scenarios for Analysis (Harvard Project on Climate Agreements,

Parson, Edward; Ernst, Lia

2012-01-01T23:59:59.000Z

32

Findings of Hydrogen Internal Combustion Engine Durability  

DOE Green Energy (OSTI)

Hydrogen Internal Combustion Engine (HICE) technology takes advantage of existing knowledge of combustion engines to provide a means to power passenger vehicle with hydrogen, perhaps as an interim measure while fuel cell technology continues to mature. This project seeks to provide data to determine the reliability of these engines. Data were collected from an engine operated on a dynamometer for 1000 hours of continuous use. Data were also collected from a fleet of eight (8) full-size pickup trucks powered with hydrogen-fueled engines. In this particular application, the data show that HICE technology provided reliable service during the operating period of the project. Analyses of engine components showed little sign of wear or stress except for cylinder head valves and seats. Material analysis showed signs of hydrogen embrittlement in intake valves.

Garrett Beauregard

2010-12-31T23:59:59.000Z

33

w.uts.edu.au/international ENGINEERING  

E-Print Network (OSTI)

energy agency (united nations), International Institute for applied Systems analysis, oecd, and world), Faculty of engineering and Information technology at utS. He is also the director of the centre for energy policy themes ­ in national and global contexts. Such themes include energy market deregulation

University of Technology, Sydney

34

Two phase exhaust for internal combustion engine  

Science Conference Proceedings (OSTI)

An internal combustion engine having a reciprocating multi cylinder internal combustion engine with multiple valves. At least a pair of exhaust valves are provided and each supply a separate power extraction device. The first exhaust valves connect to a power turbine used to provide additional power to the engine either mechanically or electrically. The flow path from these exhaust valves is smaller in area and volume than a second flow path which is used to deliver products of combustion to a turbocharger turbine. The timing of the exhaust valve events is controlled to produce a higher grade of energy to the power turbine and enhance the ability to extract power from the combustion process.

Vuk, Carl T. (Denver, IA)

2011-11-29T23:59:59.000Z

35

Engine lubrication oil aeration  

E-Print Network (OSTI)

The lubrication system of an internal combustion engine serves many purposes. It lubricates moving parts, cools the engine, removes impurities, supports loads, and minimizes friction. The entrapment of air in the lubricating ...

Baran, Bridget A. (Bridget Anne)

2007-01-01T23:59:59.000Z

36

An Additive Friction Stir Technology  

Science Conference Proceedings (OSTI)

Friction Stir Processing to Enable High Peak Combustion Pressures in Mid-sized and Heavy Duty Diesel Engines · Friction Stir Spot Welding of Magnesium to ...

37

HICEV AMERICA: HYDROGEN INTERNAL COMBUSTION ENGINE  

NLE Websites -- All DOE Office Websites (Extended Search)

HICEV AMERICA: HICEV AMERICA: HYDROGEN INTERNAL COMBUSTION ENGINE VEHICLE (HICEV) TECHNICAL SPECIFICATIONS Revision 0 November 1, 2004 Prepared by Electric Transportation Applications HICEV America Vehicle Specification i TABLE OF CONTENTS Minimum Vehicle Requirements 1 1. Regulatory Requirements 7 2. Chassis 8 3. Vehicle Characteristics 10 4. Drive System 11 5. Vehicle Performance 12 6. Hydrogen Fuel Storage System (HFSS) 14 7. Additional Vehicle Systems 17 8. Documentation 18 Appendices Appendix A - Vehicle Data 19 Appendix B - FMVSS Certification Methodology 26 DB12/7/04 HICEV America Vehicle Specification 2 MINIMUM VEHICLE REQUIREMENTS The HICEV America Program is sponsored by the U.S. Department of Energy Office of Transportation Technology to provide for independent assessment of hydrogen fueled, internal

38

Role of Friction in Materials Selection for Automotive Applications  

Science Conference Proceedings (OSTI)

This is an invited article for a special issue of the ASM International monthly magazine that concerns "Automotive Materials and Applications." The article itself overviews frictional considerations in material selection for automobiles. It discusses implications for energy efficiency (engine friction) and safety (brakes) among other topics.

Blau, Peter Julian [ORNL

2013-01-01T23:59:59.000Z

39

Analysis on driving forces of oil pumps for internal combustion engines  

Science Conference Proceedings (OSTI)

Measures to reduce friction losses for internal combustion engines have been promoted as a means to meet the recent socioeconomical demand for energy saving. This paper describes a unique study on oil pump driving forces as a part of such efforts. In this study, oil pump driving forces are divided into (1) pumping work, (2) gear intermeshing loss, (3) resistance by the viscosity of lubricating oil, (4) mechanical loss and (5) bearing friction loss. Individual driving forces have been analyzed by respective theories, which are synthesized into a theoretical equation. The comparison between the theoretically calculated values and measured values obtained by the tests has revealed that they are in good agreement, as being described in the text of the paper.

Baba, Y.; Hoshi, M.

1986-01-01T23:59:59.000Z

40

Modeling piston skirt lubrication in internal combustion engines  

E-Print Network (OSTI)

Ever-increasing demand for reduction of the undesirable emissions from the internal combustion engines propels broader effort in auto industry to design more fuel efficient engines. One of the major focuses is the reduction ...

Bai, Dongfang, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Hydrogen-fueled internal combustion engines.  

DOE Green Energy (OSTI)

The threat posed by climate change and the striving for security of energy supply are issues high on the political agenda these days. Governments are putting strategic plans in motion to decrease primary energy use, take carbon out of fuels and facilitate modal shifts. Taking a prominent place in these strategic plans is hydrogen as a future energy carrier. A number of manufacturers are now leasing demonstration vehicles to consumers using hydrogen-fueled internal combustion engines (H{sub 2}ICEs) as well as fuel cell vehicles. Developing countries in particular are pushing for H{sub 2}ICEs (powering two- and three-wheelers as well as passenger cars and buses) to decrease local pollution at an affordable cost. This article offers a comprehensive overview of H{sub 2}ICEs. Topics that are discussed include fundamentals of the combustion of hydrogen, details on the different mixture formation strategies and their emissions characteristics, measures to convert existing vehicles, dedicated hydrogen engine features, a state of the art on increasing power output and efficiency while controlling emissions and modeling.

Verhelst, S.; Wallner, T.; Energy Systems; Ghent Univ.

2009-12-01T23:59:59.000Z

42

2.61 Internal Combustion Engines, Spring 2004  

E-Print Network (OSTI)

Fundamentals of how the design and operation of internal combustion engines affect their performance, operation, fuel requirements, and environmental impact. Study of fluid flow, thermodynamics, combustion, heat transfer ...

Heywood, John B.

43

Pages that link to "Ynfiniti Engineering Services International...  

Open Energy Info (EERE)

100 | 250 | 500) Retrieved from "http:en.openei.orgwikiSpecial:WhatLinksHereYnfinitiEngineeringServicesInternational" Special pages About us Disclaimers Energy blogs...

44

Oil transport inside the oil control ring grove and its interaction with surrounding areas in internal combustion engines  

E-Print Network (OSTI)

In piston ring pack design, there is a tradeoff between reducing friction and increasing oil consumption. While friction reduces engine efficiency, oil consumption can poison exhaust aftertreatment systems. The primary ...

Senzer, Eric B

2012-01-01T23:59:59.000Z

45

International Safety Projects - Nuclear Engineering Division...  

NLE Websites -- All DOE Office Websites (Extended Search)

Nuclear Safety Materials Disposition Decontamination & Decommissioning Nuclear Criticality Safety Nuclear Data Program Nuclear Waste Form Modeling Departments Engineering...

46

Past International Joint Workshops of the Engine Emissions R...  

NLE Websites -- All DOE Office Websites (Extended Search)

Past International Joint Workshops of the Engine Emissions R&D Cluster Photo of a session from a past cluster workshop, showing participants seates at tables listening to a...

47

Changes related to "Ynfiniti Engineering Services International...  

Open Energy Info (EERE)

Login | Sign Up Wiki Browse Latinoamrica Buildings Clean Energy Economy Coordinated Low Emissions Assistance Network Geothermal Incentives and Policies International Clean Energy...

48

High efficiency stoichiometric internal combustion engine system  

DOE Patents (OSTI)

A power system including a stoichiometric compression ignition engine in which a roots blower is positioned in the air intake for the engine to control air flow. Air flow is decreased during part power conditions to maintain the air-fuel ratio in the combustion chamber of the engine at stoichiometric, thus enabling the use of inexpensive three-way catalyst to reduce oxides of nitrogen. The roots blower is connected to a motor generator so that when air flow is reduced, electrical energy is stored which is made available either to the roots blower to temporarily increase air flow or to the system electrical load and thus recapture energy that would otherwise be lost in reducing air flow.

Winsor, Richard Edward (Waterloo, IA); Chase, Scott Allen (Cedar Falls, IA)

2009-06-02T23:59:59.000Z

49

Intern experience at Fluor Engineers, Inc.: an internship report  

E-Print Network (OSTI)

This report demonstrates how the author's internship with the Houston Division of Fluor Engineers, Inc. fulfilled requirements of the Doctor of Engineering program and met the internship objectives. During the sixteen-month period between May 1980 and August 1981, the intern held the position of Engineer with the Cost and Scheduling Department. This position allowed the author to observe and participate in a wide variety of projects in both technical and supervisory capacities, dealing primarily with scheduling and cost control for construction of large chemical process plants. Substantial experience was also obtained from interface with other departments of the company, including accounting, procurement, process engineering, project engineering, finance, and design engineering. Additionally, the intern's position allowed regular contact with project and corporate management, providing exposure to the company's top decision makers. A brief overview of both cost engineering and scheduling engineering is presented to demonstrate the technical aspect of the internship. Finally, several of the author's positions at Fluor are described in order to detail the intern's experience and show specifically how each objective was achieved.

Dobbs, Stephen Benton, 1956-

1983-08-01T23:59:59.000Z

50

Modeling engine oil vaporization and transport of the oil vapor in the piston ring pack on internal combustion engines.  

E-Print Network (OSTI)

??A model was developed to study engine oil vaporization and oil vapor transport in the piston ring pack of internal combustion engines. With the assumption… (more)

Cho, Yeunwoo, 1973-

2004-01-01T23:59:59.000Z

51

Water distillation using waste engine heat from an internal combustion engine  

E-Print Network (OSTI)

To meet the needs of forward deployed soldiers and disaster relief personnel, a mobile water distillation system was designed and tested. This system uses waste engine heat from the exhaust flow of an internal combustion ...

Mears, Kevin S

2006-01-01T23:59:59.000Z

52

Beijing Haohua Rivers International Water Engineering Consulting Co Ltd |  

Open Energy Info (EERE)

Haohua Rivers International Water Engineering Consulting Co Ltd Haohua Rivers International Water Engineering Consulting Co Ltd Jump to: navigation, search Name Beijing Haohua Rivers International Water Engineering Consulting Co.Ltd. Place Beijing, Beijing Municipality, China Zip 100053 Product String representation "Beijing Haohua ... ulting Co. Ltd." is too long. Coordinates 39.90601°, 116.387909° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.90601,"lon":116.387909,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

53

Anti-overrunning device for an internal combustion engine  

Science Conference Proceedings (OSTI)

An anti-overrunning device is described for an internal combustion engine, comprising: (a) a carburetor having a venture passage for a fuel and air mixture, (b) a throttle valve in the passage movable to open and closed positions to regulate the effective area of the passage, (c) an actuator including a diaphragm responsive to pneumatic pressure operatively connected to the throttle valve, (d) an inertial pump comprising a housing having a weighted diaphragm mounted on an engine and subject to engine vibrations to develop pneumatic pressure, the inertial pump having an outlet connection to the actuator, and (e) a vibration sensor valve interposed in the outlet connection between the inertial pump and the actuator responsive to excessive vibration of the engine to connect the pump pressure to the actuator to cause movement of the throttle valve in a closing direction to reduce the speed of the engine.

Sejimo, Y.; Tsubai, T.; Tobinai, T.

1989-03-07T23:59:59.000Z

54

Anti-overrunning device for an internal combustion engine  

SciTech Connect

An anti-overrunning device for an internal combustion engine is described, consisting of (a) a carburetor having a venturi passage for a fuel and air mixture, (b) a throttle valve in the passage movable to open and closed positions to regulate the effective area of the passage, (c) an actuator including a diaphragm responsive to pneumatic pressure operatively connected to the throttle valve, (d) an inertial pump comprising a housing having a weighted diaphragm mounted on an engine and subject to engine vibrations to develop pneumatic pressure, the inertial pump having an inlet to receive atmospheric air and an outlet connected to the actuator, and (e) a vibration sensor in communication with the inertial pump inlet responsive to excessive vibration of the engine to connect the inlet to atmosphere to initiate pumping air from the outlet to the actuator to cause movement of the actuator diaphragm and the throttle valve in a closing direction to reduce the speed of the engine.

Sejimo, Y.; Tsubai, T.; Tobinai, T.

1989-03-07T23:59:59.000Z

55

Effects of piston design and lubricant selection on reciprocating engine friction  

E-Print Network (OSTI)

The interaction between the piston and the liner in a reciprocating engine is of much interest because it affects reliability, noise, and efficiency. This study evaluated various changes to the piston skirt with the specific ...

Moughon, Luke (Luke Frank)

2006-01-01T23:59:59.000Z

56

Internal Combustion Engine Advances for Distributed Generation Markets  

Science Conference Proceedings (OSTI)

Internal combustion engines (ICEs) can play a potentially significant role as a distributed generation resource. This report provides intelligence on vendor programs and on advances in ICE technology that could lead to commercial offerings within a 2-5 year time frame.

1997-09-30T23:59:59.000Z

57

Companion of the 30th international conference on Software engineering  

Science Conference Proceedings (OSTI)

Welcome to the 30th International Conference on Software Engineering in Leipzig, Germany. On behalf of the entire organizing committee, we are very happy to welcome you to ICSE which returns to Germany for the third time after Munich (1978) and Berlin ...

Wilhelm Schäfer; Matthew B. Dwyer; Volker Gruhn

2008-05-01T23:59:59.000Z

58

Alcohol fuel conversion apparatus for internal combustion engines  

Science Conference Proceedings (OSTI)

An alcohol fuel conversion apparatus is described for internal combustion engines comprising: fuel storage means containing an alcohol fuel; primary heat exchanger means in fluid communication with the fuel storage means for transferring heat to pressurized alcohol contained within the heat exchanger means; a heat source for heating the heat exchange means; pressure relief valve means, in closed fluid communication with the primary heat exchange means, operable to release heated pressurized alcohol into an expansion chamber; converter means, including the expansion chamber, in fluid communication with the pressure relief valve means for receiving the heated pressurized alcohol and for the vaporization of the alcohol; carburetor means in fluid communication with the converter means for metering and mixing vaporized alcohol with air for proper combustion and for feeding the mixture to an internal combustion engine; and pump means for pressurized pumping of alcohol from the fuel storage means to the heat exchanger means, converter means, carburetor means, and to the engine.

Carroll, B.I.

1987-01-13T23:59:59.000Z

59

Hydrogen Internal Combustion Engine (ICE) Vehicle Testing Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Internal Combustion Internal Combustion Engine (ICE) Vehicle Testing Activities James Francfort Idaho National Laboratory 2 Paper #2006-01-0433 Presentation Outline Background and goal APS Alternative Fuel (Hydrogen) Pilot Plant - design and operations Fuel dispensing and prototype dispenser Hydrogen (H2) and HCNG (compressed natural gas) internal combustion engine (ICE) vehicle testing WWW Information 3 Paper #2006-01-0433 Background Advanced Vehicle Testing Activity (AVTA) is part of DOE's FreedomCAR and Vehicle Technologies Program These activities are conducted by the Idaho National Laboratory (INL) and the AVTA testing partner Electric Transportation Applications (ETA) 4 Paper #2006-01-0433 AVTA Goal Provide benchmark data for technology modeling, research and development programs, and help fleet managers and

60

Water cooled scavenged crankcase type otto internal combustion engine  

Science Conference Proceedings (OSTI)

In a system for a water cooled scavenged crankcase type two-cycle internal combustion engine comprising: a heat reclaimation system for extracting heat from an engine jacket for heating water supplied form an add-on reservoir via a heat exchanger located within the engine cylinder cooling system, the water being subsequently additionally heated by an exhaust pipe type heat exchanger to a superheated steam state and thence conveyed by a conduit to a steam lubricator for adjustably conveying in variably timed spaced succession intervals of regulated droplets of high viscous oil, fortified with adde graphite and tallow enrichment lubricant ingredients, and thence conveying such by steam at atmospheric pressure into an intake manifold which receives a carbureted air/fuel mixture into the crankcase via a manually operated auxiliary air intake device and way check valve and fire screen, due to suction effect of the piston up stroke action of the piston during engine operation.

Bidwell, H.

1988-10-25T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

International Joint Workshop of the Engine Emissions R&D Cluster  

NLE Websites -- All DOE Office Websites (Extended Search)

International Joint Workshop of the Engine Emissions R&D Cluster Banner image for International JHoint Workshop of the Engine Emissions R&D Cluster Welcome to the website of the...

62

Proceedings of the 6th International Workshop on Traceability in Emerging Forms of Software Engineering  

Science Conference Proceedings (OSTI)

Welcome to the 6th International Workshop on Traceability in Emerging Forms of Software Engineering (TEFSE 2011), which is collocated with the 33rd ACM/IEEE International Conference on Software Engineering (ICSE'11) in Waikiki, Honolulu, Hawaii. We hope ...

Denys Poshyvanyk; Massimiliano Di Penta; Huzefa Kagdi

2011-05-01T23:59:59.000Z

63

Multiple fuel supply system for an internal combustion engine  

DOE Patents (OSTI)

A multiple fuel supply or an internal combustion engine wherein phase separation of components is deliberately induced. The resulting separation permits the use of a single fuel tank to supply components of either or both phases to the engine. Specifically, phase separation of a gasoline/methanol blend is induced by the addition of a minor amount of water sufficient to guarantee separation into an upper gasoline phase and a lower methanol/water phase. A single fuel tank holds the two-phase liquid with separate fuel pickups and separate level indicators for each phase. Either gasoline or methanol, or both, can be supplied to the engine as required by predetermined parameters. A fuel supply system for a phase-separated multiple fuel supply contained in a single fuel tank is described.

Crothers, William T. (Sunol, CA)

1977-01-01T23:59:59.000Z

64

Modeling engine oil vaporization and transport of the oil vapor in the piston ring pack on internal combustion engines  

E-Print Network (OSTI)

A model was developed to study engine oil vaporization and oil vapor transport in the piston ring pack of internal combustion engines. With the assumption that the multi-grade oil can be modeled as a compound of several ...

Cho, Yeunwoo, 1973-

2004-01-01T23:59:59.000Z

65

Apparatus for photocatalytic destruction of internal combustion engine emissions during cold start  

DOE Patents (OSTI)

A method and apparatus for the destruction of emissions from an internal combustion engine wherein a substrate coated with TiO.sub.2 is exposed to a light source in the exhaust system of an internal combustion engine thereby catalyzing oxidation/reduction reactions between gaseous hydrocarbons, carbon monoxide, nitrogen oxides and oxygen in the exhaust of the internal combustion engine.

Janata, Jiri (Richland, WA); McVay, Gary L. (Richland, WA); Peden, Charles H. (West Richland, WA); Exarhos, Gregory J. (Richland, WA)

1998-01-01T23:59:59.000Z

66

Characterization of oil transport in the power cylinder of internal combustion engines during steady state and transient operation  

E-Print Network (OSTI)

Engine friction, wear, and oil consumption are some of the primary interests for the automotive industry. However, there is currently a lack of understanding of the fundamentals involving oil transport inside the power ...

Przesmitzki, Steve (Steve Victor)

2008-01-01T23:59:59.000Z

67

Exhaust gas recirculation system for an internal combustion engine  

SciTech Connect

An exhaust gas recirculation system for an internal combustion engine comprises an exhaust driven turbocharger having a low pressure turbine outlet in fluid communication with an exhaust gas conduit. The turbocharger also includes a low pressure compressor intake and a high pressure compressor outlet in communication with an intake air conduit. An exhaust gas recirculation conduit fluidly communicates with the exhaust gas conduit to divert a portion of exhaust gas to a low pressure exhaust gas recirculation branch extending between the exhaust gas recirculation conduit and an engine intake system for delivery of exhaust gas thereto. A high pressure exhaust gas recirculation branch extends between the exhaust gas recirculation conduit and the compressor intake and delivers exhaust gas to the compressor for mixing with a compressed intake charge for delivery to the intake system.

Wu, Ko-Jen

2013-05-21T23:59:59.000Z

68

Fuel injector nozzle for an internal combustion engine  

DOE Green Energy (OSTI)

A direct injection fuel injector includes a nozzle tip having a plurality of passages allowing fluid communication between an inner nozzle tip surface portion and an outer nozzle tip surface portion and directly into a combustion chamber of an internal combustion engine. A first group of the passages have inner surface apertures located substantially in a first common plane. A second group of the passages have inner surface apertures located substantially in at least a second common plane substantially parallel to the first common plane. The second group has more passages than the first group.

Cavanagh, Mark S. (Bloomington, IL); Urven, Jr., Roger L. (Colona, IL); Lawrence, Keith E. (Peoria, IL)

2008-11-04T23:59:59.000Z

69

Partially-Premixed Flames in Internal Combustion Engines  

DOE Green Energy (OSTI)

This was a joint university-industry research program funded by the Partnerships for the Academic-Industrial Research Program (PAIR). The research examined partially premixed flames in laboratory and internal combustion engine environments at Vanderbilt University, University of Michigan, and General Motors Research and Development. At Vanderbilt University, stretched and curved ''tubular'' premixed flames were measured in a unique optically accessible burner with laser-induced spontaneous Raman scattering. Comparisons of optically measured temperature and species concentration profiles to detailed transport, complex chemistry simulations showed good correspondence at low-stretch conditions in the tubular flame. However, there were significant discrepancies at high-stretch conditions near flame extinction. The tubular flame predictions were found to be very sensitive to the specific hydrogen-air chemical kinetic mechanism and four different mechanisms were compared. In addition, the thermo-diffusive properties of the deficient reactant, H2, strongly affected the tubular flame structure. The poor prediction near extinction is most likely due to deficiencies in the chemical kinetic mechanisms near extinction. At the University of Michigan, an optical direct-injected engine was built up for laser-induced fluorescence imaging experiments on mixing and combustion under stratified charge combustion conditions with the assistance of General Motors. Laser attenuation effects were characterized both experimentally and numerically to improve laser imaging during the initial phase of the gasoline-air mixture development. Toluene was added to the isooctane fuel to image the fuel-air equivalence ratio in an optically accessible direct-injected gasoline engine. Temperature effects on the toluene imaging of fuel-air equivalence ratio were characterized. For the first time, oxygen imaging was accomplished in an internal combustion engine by combination of two fluorescence trackers, toluene and 3-pentanone. With this method, oxygen, fuel and equivalence ratio were measured in the cylinder. At General Motors, graduate students from the University of Michigan and Vanderbilt University worked with GM researchers to develop high-speed imaging methods for optically accessible direct-injection engines. Spark-emission spectroscopy was combined with high-speed spectrally-resolved combustion imaging in a direct-injected engine.

Robert W. Pitz; Michael C. Drake; Todd D. Fansler; Volker Sick

2003-11-05T23:59:59.000Z

70

Automatic fault diagnosis of internal combustion engine based on spectrogram and artificial neural network  

Science Conference Proceedings (OSTI)

This paper presents a signal analysis technique for internal combustion (IC) engine fault diagnosis based on the spectrogram and artificial neural network (ANN). Condition monitoring and fault diagnosis of IC engine through acoustic signal analysis is ... Keywords: acoustic analysis, fault diagnosis, internal combustion engine

Sandeep Kumar Yadav; Prem Kumar Kalra

2010-04-01T23:59:59.000Z

71

Evaluation and silicon nitride internal combustion engine components  

DOE Green Energy (OSTI)

The feasibility of silicon nitride (Si[sub 3]N[sub 4]) use in internal combustion engines was studied by testing three different components for wear resistance and lower reciprocating mass. The information obtained from these preliminary spin rig and engine tests indicates several design changes are necessary to survive high-stress engine applications. The three silicon nitride components tested were valve spring retainers, tappet rollers, and fuel pump push rod ends. Garrett Ceramic Components' gas-pressure sinterable Si[sub 3]N[sub 4] (GS-44) was used to fabricate the above components. Components were final machined from densified blanks that had been green formed by isostatic pressing of GS-44 granules. Spin rig testing of the valve spring retainers indicated that these Si[sub 3]N[sub 4] components could survive at high RPM levels (9,500) when teamed with silicon nitride valves and lower spring tension than standard titanium components. Silicon nitride tappet rollers showed no wear on roller O.D. or I.D. surfaces, steel axles and lifters; however, due to the uncrowned design of these particular rollers the cam lobes indicated wear after spin rig testing. Fuel pump push rod ends were successful at reducing wear on the cam lobe and rod end when tested on spin rigs and in real-world race applications.

Voldrich, W. (Allied-Signal Aerospace Co., Torrance, CA (United States). Garrett Ceramic Components Div.)

1992-04-01T23:59:59.000Z

72

The Second International Stirling Engine Conference, Shanghai, Peoples Republic of China, June 1984  

SciTech Connect

The Second International Stirling Engine Conference was held in Shanghai, Peoples Republic of China in June 1984. This paper reviews some of the events leading to the conference and the establishment of the Stirling Engine Conference Council.

Walker, G.

1984-08-01T23:59:59.000Z

73

International Joint Workshop of the Engine Emissions R&D Cluster  

NLE Websites -- All DOE Office Websites (Extended Search)

Contact Us For additional information about the International Joint Workshop of the Engine Emissions R&D Cluster, please contact: Kyeong O. Lee, Ph.D. Engine Emissions Research...

74

Control of Combustion Processes in an Internal Combustion Engine by Low-Temperature Plasma  

Science Conference Proceedings (OSTI)

A new method of operation of internal combustion engines enhances power and reduces fuel consumption and exhaust toxicity. Low-temperature plasma control combines working processes of thermal engines and steam machines into a single process.

E. A. Olenev

2002-07-01T23:59:59.000Z

75

Towards a detailed soot model for internal combustion engines  

Science Conference Proceedings (OSTI)

In this work, we present a detailed model for the formation of soot in internal combustion engines describing not only bulk quantities such as soot mass, number density, volume fraction, and surface area but also the morphology and chemical composition of soot aggregates. The new model is based on the Stochastic Reactor Model (SRM) engine code, which uses detailed chemistry and takes into account convective heat transfer and turbulent mixing, and the soot formation is accounted for by SWEEP, a population balance solver based on a Monte Carlo method. In order to couple the gas-phase to the particulate phase, a detailed chemical kinetic mechanism describing the combustion of Primary Reference Fuels (PRFs) is extended to include small Polycyclic Aromatic Hydrocarbons (PAHs) such as pyrene, which function as soot precursor species for particle inception in the soot model. Apart from providing averaged quantities as functions of crank angle like soot mass, volume fraction, aggregate diameter, and the number of primary particles per aggregate for example, the integrated model also gives detailed information such as aggregate and primary particle size distribution functions. In addition, specifics about aggregate structure and composition, including C/H ratio and PAH ring count distributions, and images similar to those produced with Transmission Electron Microscopes (TEMs), can be obtained. The new model is applied to simulate an n-heptane fuelled Homogeneous Charge Compression Ignition (HCCI) engine which is operated at an equivalence ratio of 1.93. In-cylinder pressure and heat release predictions show satisfactory agreement with measurements. Furthermore, simulated aggregate size distributions as well as their time evolution are found to qualitatively agree with those obtained experimentally through snatch sampling. It is also observed both in the experiment as well as in the simulation that aggregates in the trapped residual gases play a vital role in the soot formation process. (author)

Mosbach, Sebastian; Celnik, Matthew S.; Raj, Abhijeet; Kraft, Markus [Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke Street, Cambridge CB2 3RA (United Kingdom); Zhang, Hongzhi R. [Department of Chemical Engineering, University of Utah, 1495 East 100 South, Kennecott Research Building, Salt Lake City, UT 84112 (United States); Kubo, Shuichi [Frontier Research Center, Toyota Central R and D Labs., Inc., Nagakute, Aichi 480-1192 (Japan); Kim, Kyoung-Oh [Higashifuji Technical Center, Toyota Motor Corporation, Mishuku 1200, Susono, Shizuoka 480-1193 (Japan)

2009-06-15T23:59:59.000Z

76

A Decade of Progress in Friction Stirring of High-Temperature ...  

Science Conference Proceedings (OSTI)

Friction Stir Processing to Enable High Peak Combustion Pressures in Mid-sized and Heavy Duty Diesel Engines · Friction Stir Spot Welding of Magnesium to ...

77

Jet plume injection and combustion system for internal combustion engines  

DOE Patents (OSTI)

An improved combustion system for an internal combustion engine is disclosed wherein a rich air/fuel mixture is furnished at high pressure to one or more jet plume generator cavities adjacent to a cylinder and then injected through one or more orifices from the cavities into the head space of the cylinder to form one or more turbulent jet plumes in the head space of the cylinder prior to ignition of the rich air/fuel mixture in the cavity of the jet plume generator. The portion of the rich air/fuel mixture remaining in the cavity of the generator is then ignited to provide a secondary jet, comprising incomplete combustion products which are injected into the cylinder to initiate combustion in the already formed turbulent jet plume. Formation of the turbulent jet plume in the head space of the cylinder prior to ignition has been found to yield a higher maximum combustion pressure in the cylinder, as well as shortening the time period to attain such a maximum pressure.

Oppenheim, Antoni K. (Kensington, CA); Maxson, James A. (Berkeley, CA); Hensinger, David M. (Albany, CA)

1993-01-01T23:59:59.000Z

78

Jet plume injection and combustion system for internal combustion engines  

DOE Patents (OSTI)

This invention is comprised of an improved combustion system for an internal combustion engine is disclosed wherein a rich air/fuel mixture is furnished at high pressure to one or more jet plume generator cavities adjacent to a cylinder and then injected through one or more orifices from the cavities into the head space of the cylinder to form one or more turbulent jet plumes in the head space of the cylinder prior to ignition of the rich air/fuel mixture in the cavity of the jet plume generator. The portion of the rich air/fuel mixture remaining in the cavity of the generator is then ignited to provide a secondary jet, comprising incomplete combustion products which are injected into the cylinder to initiate combustion in the already formed turbulent jet plume. Formation of the turbulent jet plume in the head space of the cylinder prior to ignition has been found to yield a higher maximum combustion pressure in the cylinder, as well as shortening the time period to attain such a maximum pressure.

Oppenheim, A.K.; Maxson, J.A.; Hensinger, D.M.

1992-12-31T23:59:59.000Z

79

Jet plume injection and combustion system for internal combustion engines  

DOE Patents (OSTI)

An improved combustion system for an internal combustion engine is disclosed wherein a rich air/fuel mixture is furnished at high pressure to one or more jet plume generator cavities adjacent to a cylinder and then injected through one or more orifices from the cavities into the head space of the cylinder to form one or more turbulent jet plumes in the head space of the cylinder prior to ignition of the rich air/fuel mixture in the cavity of the jet plume generator. The portion of the rich air/fuel mixture remaining in the cavity of the generator is then ignited to provide a secondary jet, comprising incomplete combustion products which are injected into the cylinder to initiate combustion in the already formed turbulent jet plume. Formation of the turbulent jet plume in the head space of the cylinder prior to ignition has been found to yield a higher maximum combustion pressure in the cylinder, as well as shortening the time period to attain such a maximum pressure. 24 figures.

Oppenheim, A.K.; Maxson, J.A.; Hensinger, D.M.

1993-12-21T23:59:59.000Z

80

Materials Reliability Program: Aging Management Strategies for Westinghouse and Combustion Engineering PWR Internals (MRP-232)  

Science Conference Proceedings (OSTI)

This report summarizes the aging management strategy development for Westinghouse and Combustion Engineering (CE) reactor internals. This report provides the technical basis for the aging management requirements of Westinghouse and CE reactor internals in the Pressurized Water Reactor (PWR) internals I&E guidelines (MRP-227-Rev. 0).

2008-12-22T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Proceedings of the ninth international conference on Generative programming and component engineering  

Science Conference Proceedings (OSTI)

Welcome to the Ninth International Conference on Generative Programming and Component Engineering (GPCE'10). GPCE is a venue for researchers and practitioners interested in software components and program generation, and how these technologies can increase ...

Eelco Visser; Jaakko Järvi

2010-10-01T23:59:59.000Z

82

Modeling the lubrication of the piston ring pack in internal combustion engines using the deterministic method  

E-Print Network (OSTI)

Piston ring packs are used in internal combustion engines to seal both the high pressure gas in the combustion chamber and the lubricant oil in the crank case. The interaction between the piston ring pack and the cylinder ...

Chen, Haijie

2011-01-01T23:59:59.000Z

83

Numerical modeling of piston secondary motion and skirt lubrication in internal combustion engines  

E-Print Network (OSTI)

Internal combustion engines dominate transportation of people and goods, contributing significantly to air pollution, and requiring large amounts of fossil fuels. With increasing public concern about the environment and ...

McClure, Fiona

2007-01-01T23:59:59.000Z

84

Proceedings of the 4th ACM/SPEC International Conference on Performance Engineering  

Science Conference Proceedings (OSTI)

We are delighted to bring you an outstanding technical program to 2013 International Conference on Performance Engineering -- ICPE'13 in Prague. The main Research track for the conference attracted 42 submissions. Thanks to the diligent efforts ...

Petr T?ma; Giuliano Casale; Tony Field; José Nelson Amaral, Seetharami Seelam

2013-04-01T23:59:59.000Z

85

Research and development of hydrogen direct-injection internal combustion engine system  

Science Conference Proceedings (OSTI)

The research and development of hydrogen-internal combustion engine (ICE) system for heavy-duty trucks, with the goal of allowing carbon dioxide (CO2)-free operation in transportation department, has been carried out. The high-pressure hydrogen ... Keywords: NOx emission reduction, NOx storage reduction catalyst, carbon dioxide-free, direct injection, heavy-duty truck, high-pressure hydrogen injector, hydrogen, internal combustion engine

Yoshio Sato; Atsuhiro Kawamura; Tadanori Yanai; Kaname Naganuma; Kimitaka Yamane; Yasuo Takagi

2009-02-01T23:59:59.000Z

86

Experimental Study of Air-Fuel Ratio Control Strategy for a Hydrogen Internal Combustion Engine  

Science Conference Proceedings (OSTI)

One of the most attractive combustive features for hydrogen fuel is its wide range of flammability. The wide flammability limits allow hydrogen engine to be operated at extremely lean air–fuel ratios compared to conventional fuels. Concepts for ... Keywords: Hydrogen internal combustion engine, Air/Fuel ratio, Control strategy

Zhong-yu Zhao; Fu-shui Liu

2010-11-01T23:59:59.000Z

87

Research on the Performance and Emission of a Port Fuel Injection Hydrogen Internal Combustion Engine  

Science Conference Proceedings (OSTI)

A 2.0L nature aspirate gasoline engine was modified to port fuel injection (PFI) hydrogen internal combustion engine (HICE) and a series dynamometer tests were carried out. The in-cylinder combustion process was analyzed, the performance, thermal efficiency ... Keywords: hydrogen ICE, performance, emission, combustion characteristics

Dawei Sun; Fushui Liu

2011-02-01T23:59:59.000Z

88

Research on the Performance and Emission of a Port Fuel Injection Hydrogen Internal Combustion Engine  

Science Conference Proceedings (OSTI)

A 2.0L nature aspirate gasoline engine was modified to port fuel injection (PFI) hydrogen internal combustion engine (HICE) and a series dynamometer tests were carried out. The in-cylinder combustion process was analyzed, the performance, thermal efficiency ... Keywords: hydrogen ICE, performance, emission, combustion characteristics

Dawei Sun; Fushui Liu

2010-12-01T23:59:59.000Z

89

Monitoring of some functional parameters for an internal-combustion engine  

Science Conference Proceedings (OSTI)

This work presents the achievement of a monitoring, recording, processing and interpretation concept, at laboratory scale, of some functional parameters for a spark-ignition engine, based on an electronic equipment, which measures the values of 17 parameters ... Keywords: cylinder, internal-combustion engine, pressure, sensors, speed

Sorin Ra?iu; Gabriel Nicolae Popa; Vasile Alexa

2008-11-01T23:59:59.000Z

90

MECH 410N Outline-2010.doc MECH 410N -Internal Combustion Engines  

E-Print Network (OSTI)

MECH 410N Outline-2010.doc 01/09/2010 MECH 410N - Internal Combustion Engines COURSE OUTLINE 1-IGNITION ENGINES 2.1. Air-Standard & Fuel-Air Cycle analysis 2.2. Performance Criteria 2.3. SI Engine Combustion 3.2. The Limited Pressure Cycle 3.3. The fuel-air cycle with complete combustion 3.4. Turbocharged

91

Internal combustion engine with rotary valve assembly having variable intake valve timing  

DOE Patents (OSTI)

An internal combustion engine has rotary valves associated with movable shutters operable to vary the closing of intake air/fuel port sections to obtain peak volumetric efficiency over the entire range of speed of the engine. The shutters are moved automatically by a control mechanism that is responsive to the RPM of the engine. A foot-operated lever associated with the control mechanism is also used to move the shutters between their open and closed positions.

Hansen, Craig N. (Eden Prairie, MN); Cross, Paul C. (Shorewood, MN)

1995-01-01T23:59:59.000Z

92

"Optimization of efficiency of internal combustion engines via using  

NLE Websites -- All DOE Office Websites (Extended Search)

Optimization of efficiency of internal combustion engines via using Optimization of efficiency of internal combustion engines via using spinning gas and non-spectroscopic method of determining gas constituents through rotation ..--.. Inventors Nathaniel Fisch, Vasily Geyko An important use of the disclosed approach is the improvement efficiency of thermal cycles and as result efficiency of engines. Different cycles and different ways of compression of spinning gas may be used to maximize possible efficiency gain. In conventional internal combustion engines, gas spinning is either not used at all or used only with the purpose of increasing turbulence and better mixing. In the disclosed method, gas rotation is used for energy storage, hence it allows an improvement in thermal cycle efficiency. To achieve significant effect related to

93

Educational initiative for EE/RE engineering skills: Solar Two student interns. Final report  

SciTech Connect

The US Department of Energy sponsored five student interns from the University of California, Riverside, College of Engineering to work during the summer of 1996 at the Solar Two Energy facility in the Mojave Desert. Through the DOE intern program, engineering students supported the Solar Two Project under the supervision of engineers from Southern California Edison. The prime purpose was to provide outreach and educational support for expanding interactions with university students to increase awareness of careers in renewable energy and energy efficiency fields. The College of Engineering-Center for Environmental Research and Technology (CE-CERT) coordinated this project. CE-CERT is primarily a research facility focusing on air pollution and energy efficiency. CE-CERT serves undergraduate and graduate students by employing them on research projects, supporting them in the research and experimentation required for Senior Design Projects, and sponsoring them in student engineering competitions.

Norbeck, J.M.

1997-07-01T23:59:59.000Z

94

Numerical modeling of hydrogen-fueled internal combustion engines  

DOE Green Energy (OSTI)

The planned use of hydrogen as the energy carrier of the future introduces new challenges and opportunities, especially to the engine design community. Hydrogen is a bio-friendly fuel that can be produced from renewable resources and has no carbon dioxide combustion products; and in a properly designed ICE, almost zero NO{sub x} and hydrocarbon emissions can be achieved. Because of the unique properties of hydrogen combustion - in particular the highly wrinkled nature of the laminar flame front due to the preferential diffusion instability - modeling approaches for hydrocarbon gaseous fuels are not generally applicable to hydrogen combustion. This paper reports on the current progress to develop a engine design capability based on KIVA family of codes for hydrogen-fueled, spark-ignited engines in support of the National Hydrogen Program. A turbulent combustion model, based on a modified eddy-turnover model in conjunction with an intake flow valve model, is found to describe well the efficiency and NO{sub x} emissions of this engine satisfy the Equivalent Zero Emission Vehicle (EZEV) standard established by the California Resource Board. 26 refs., 10 figs., 1 tab.

Johnson, N.L.; Amsden, A.A.

1996-12-31T23:59:59.000Z

95

Job Title Organization Name Type End Date Job ID Intern -Industrial Engineer Jabil Circuit, Inc. Intern 8/15/2012 36012  

E-Print Network (OSTI)

Job Title Organization Name Type End Date Job ID Intern - Industrial Engineer Jabil Circuit, Inc HVAC Equipment Technical Support Tom Barrow Co. Full-time 7/31/2012 36332 Internship HQ Inc Intern 9

Meyers, Steven D.

96

Proceedings of the ASME 2011 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference  

E-Print Network (OSTI)

and Information in Engineering Conference IDETC/CIE 2011 August 28-31, 2011, Washington, DC, USA DETC2011 and Information in Engineering Conference IDETC/CIE 2011 August 28-31, 2011, Washington, DC, USA DETC2011-4 1 in sig- nals [1, 2]. For a one-dimensional signal, a window of an odd number of elements slides over

Chen, YangQuan

97

BIBLIOGRAPHY ON INTERNAL COMBUSTION ENGINES 1. F. Obert, Internal Combustion Engines and Air Pollution, Intext Educational Publishers, 1973  

E-Print Network (OSTI)

depend on vari- ous factors: engine temperature and load, aftertreatment de- vices and dilution-11545-2010 © Author(s) 2010. CC Attribution 3.0 License. Atmospheric Chemistry and Physics Impact of aftertreatment aftertreatment systems. One vehicle lacked exhaust aftertreatment devices, one ve- hicle was equipped

Entekhabi, Dara

98

Friction Control Solutions Inc FriCSo | Open Energy Information  

Open Energy Info (EERE)

Friction Control Solutions Inc FriCSo Friction Control Solutions Inc FriCSo Jump to: navigation, search Name Friction Control Solutions Inc. (FriCSo) Place Farmington Hills, Michigan Zip 48331 Product FriCSo offers surface engineering solutions to reduce friction between metal parts and its resulting costs. Main market targeted is engine manufacturing for the shipping and military industries. References Friction Control Solutions Inc. (FriCSo)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Friction Control Solutions Inc. (FriCSo) is a company located in Farmington Hills, Michigan . References ↑ "Friction Control Solutions Inc. (FriCSo)" Retrieved from "http://en.openei.org/w/index.php?title=Friction_Control_Solutions_Inc_FriCSo&oldid=345507"

99

Understanding Mercury Chemistry via the Reaction Engineering International (REI) ProMerc(tm) Model  

Science Conference Proceedings (OSTI)

Mercury chemistry in a coal-fired boiler remains poorly understood. As a result, power company engineers cannot predict with confidence the level of mercury emissions they would experience at a given site if they change coals, add/enhance criteria pollutant controls, or implement mercury controls. Similarly, they cannot predict with confidence how mercury control test results at one site extrapolate to other sites. This report documents a modeling study conducted by Reaction Engineering International (RE...

2008-03-04T23:59:59.000Z

100

Apparatus for improving gasoline comsumption, power and reducing emission pollutants of internal combustion engines  

Science Conference Proceedings (OSTI)

This patent describes an apparatus for improving performance and reducing fuel comsumption and emission pollutants from an internal combustion gasoline engine. This apparatus consists of: 1.) an internal combustion gasoline engine having, in part, an intake manifold and an exhaust manifold where the exhaust manifold is modified to include a manifold exhaust port; 2.) a modified internal combustion engine carburetor connected to the intake manifold on the engine; 3.) a positive crankcase ventilation valve (PCV) which has an input port conventionally connected to the internal combustion engine and also has a PCV output port; 4.) an automobile fuel pump having an input connected to a conventional fuel tank and having a fuel pump output port; 5.) a thermic reactor; 6.) a thermic reactor air cleaner pneumatically connected to the clean air input port on the thermic reactor; 7.) a catalytic gas injector; 8.) a fuel regulator/restrictor consisting of a solid block having a fuel pump input port and a carburetor output port.

Piedrafita, R.

1986-02-18T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Apparatus and method for operating internal combustion engines from variable mixtures of gaseous fuels  

DOE Patents (OSTI)

An apparatus and method for utilizing any arbitrary mixture ratio of multiple fuel gases having differing combustion characteristics, such as natural gas and hydrogen gas, within an internal combustion engine. The gaseous fuel composition ratio is first sensed, such as by thermal conductivity, infrared signature, sound propagation speed, or equivalent mixture differentiation mechanisms and combinations thereof which are utilized as input(s) to a "multiple map" engine control module which modulates selected operating parameters of the engine, such as fuel injection and ignition timing, in response to the proportions of fuel gases available so that the engine operates correctly and at high efficiency irrespective of the gas mixture ratio being utilized. As a result, an engine configured according to the teachings of the present invention may be fueled from at least two different fuel sources without admixing constraints.

Heffel, James W. (Lake Matthews, CA); Scott, Paul B. (Northridge, CA); Park, Chan Seung (Yorba Linda, CA)

2011-11-01T23:59:59.000Z

102

The railplug: A new ignitor for internal combustion engines  

SciTech Connect

A miniaturized railgun, termed the {open_quotes}railplug,{close_quotes} has been developed for use as an ignitor of combustible mixtures in engines. The device drives a plasma armature in a multishot mode with the aim of creating a line-source for ignition rather than the point source provided by traditional spark plugs. Railplugs have been fabricated in both parallel rail and co-axial rail geometries. The railplug differs from most plasma armature railguns in two striking ways: (1) no fuse or pellet is used to initially establish the plasma (the armature is simply the arc created by a high-voltage pulse), and (2) it operates over a range of elevated pressures (up to 500 psi). Consequently, the railplug power supply must provide a high voltage spike to breakdown the gap between the rails followed by a sustaining voltage that supplies current to drive the arc down the rails. Conceptually, this is the equivalent of combining the electrostatic problem of a sparkplug with the electrodynamic one of a railgun. Two power supply options that do this are outlined, as well as details of railplug geometries. Successes to date have demonstrated the firing of plugs for over 10{sup 4} shots at delivered arc energies of 1 J per shot. Rep rates have been demonstrated up to 50 Hz.

Faidley, R.W.; Darden, M.H.; Weldon, W.F.

1995-01-01T23:59:59.000Z

103

Friction Stir Processing  

Science Conference Proceedings (OSTI)

Mar 2, 2011... and Heavy Duty Diesel Engines: Glenn Grant1; Saumyadeep Jana1; Mark Veliz2; ... As the internal combustion engine has gained efficiency, peak combustion ... materials must be modified in a way that increases their durability. .... to substantial changes in the constituent particle size and distribution, ...

104

Nano/Micro Engineered and Molecular Systems The 8th Annual IEEE International Conference on  

E-Print Network (OSTI)

Nano/Micro Engineered and Molecular Systems The 8th Annual IEEE International Conference on April 7. Nanomedicine 4. Nanobiology, Nano-bio-informatics 5. Molecular Sensors, Actuators, and Systems 6. Carbon Nanotube and Graphene based Devices and Systems 7. Microfluidics and Nanofluidics 8. Micro and Nano Heat

Sanders, Seth

105

Third International Workshop on Software Engineering for High Performance Computing (HPC) Applications  

E-Print Network (OSTI)

Third International Workshop on Software Engineering for High Performance Computing (HPC, and financial modeling. The TOP500 website (http://www.top500.org) lists the top 500 high performance computing to define new ways of measuring high performance computing systems that take into account not only the low

Carver, Jeffrey C.

106

Proceedings of IMECE'04 2004 ASME International Mechanical Engineering Congress & Exposition  

E-Print Network (OSTI)

and induce radiation exposure. Therefore, a great need exists for new noninvasive methods that pose lessProceedings of IMECE'04 2004 ASME International Mechanical Engineering Congress & Exposition-Slope Difference Mapping of Transient Radiation Signals Zhixiong Guo* Department of Mechanical and Aerospace

Guo, Zhixiong "James"

107

Method and apparatus for minimizing the fuel usage in an internal combustion engine  

SciTech Connect

An apparatus and method is disclosed for minimizing the fuel usage in an internal combustion engine. The subject invention is particularly adapted for use with an engine installation subject to varying loads and which includes a governor for varying fuel flow as a function of load. In operation, the combustibles in the exhaust gas of the engine is continuously monitored. The measured level of combustibles is then compared with a predetermined level corresponding to optimum efficiency. A controller is provided for varying the air/fuel ratio supplied to the engine for maximizing efficiency in correspondence with the preset level. By this arrangement, energy output is increased permitting the governor to further reduce fuel flow, thereby minimizing energy costs.

Smojven, R.R.

1984-09-18T23:59:59.000Z

108

Certification of a weld produced by friction stir welding  

DOE Patents (OSTI)

Methods, devices, and systems for providing certification of friction stir welds are disclosed. A sensor is used to collect information related to a friction stir weld. Data from the sensor is compared to threshold values provided by an extrinsic standard setting organizations using a certification engine. The certification engine subsequently produces a report on the certification status of the weld.

Obaditch, Chris; Grant, Glenn J

2013-10-01T23:59:59.000Z

109

Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages  

DOE Patents (OSTI)

An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine's crankcase. The crankcase ventilation passages extend from passages formed in the main bearing bulkheads from positions above the oil level in the crankcase and ultimately through the cylinder head. Oil dams surrounding the uppermost portions of the crankcase ventilation passages prevent oil from running downwardly through the crankcase ventilation passages.

Boggs, David Lee (Bloomfield Hills, MI); Baraszu, Daniel James (Plymouth, MI); Foulkes, David Mark (Erfstadt, DE); Gomes, Enio Goyannes (Ann Arbor, MI)

1998-01-01T23:59:59.000Z

110

The railplug: Development of a new ignitor for internal combustion engines. Final report  

DOE Green Energy (OSTI)

A three year investigation of a new type of ignitor for internal combustion engines has been performed using funds from the Advanced Energy Projects Program of The Basic Energy Sciences Division of the U.S. Department of Energy and with matching funding from Research Applications, Inc. This project was a spin-off of {open_quotes}Star Wars{close_quotes} defense technology, specifically the railgun. The {open_quotes}railplug{close_quotes} is a miniaturized railgun which produces a high velocity plume of plasma that is injected into the combustion chamber of an engine. Unlike other types of alternative ignitors, such as plasma jet ignitors, electromagnetic forces enhance the acceleration of the plasma generated by a railplug. Thus, for a railplug, the combined effects of electromagnetic and thermodynamic forces drive the plasma into the combustion chamber. Several engine operating conditions or configurations can be identified that traditionally present ignition problems, and might benefit from enhanced ignition systems. One of these is ultra-lean combustion in spark ignition (SI) engines. This concept has the potential for lowering emissions of NOx while simultaneously improving thermal efficiency. Unfortunately, current lean burn engines cannot be operated sufficiently lean before ignition related problems are encountered to offer any benefits. High EGR engines have similar potential for emissions improvement, but also experience similar ignition problems, particularly at idle. Other potential applications include diesel cold start, alcohol and dual fuel engines, and high altitude relight of gas turbines. The railplug may find application for any of the above. This project focused on three of these potential applications: lean burn SI engines, high EGR SI engines, and diesel cold start.

Matthews, R.D.; Nichols, S.P.; Weldon, W.F.

1994-11-29T23:59:59.000Z

111

Method for reducing peak phase current and decreasing staring time for an internal combustion engine having an induction machine  

DOE Patents (OSTI)

A method for reducing the starting time and reducing the peak phase currents for an internal combustion engine that is started using an induction machine starter/alternator. The starting time is reduced by pre-fluxing the induction machine and the peak phase currents are reduced by reducing the flux current command after a predetermined period of time has elapsed and concurrent to the application of the torque current command. The method of the present invention also provides a strategy for anticipating the start command for an internal combustion engine and determines a start strategy based on the start command and the operating state of the internal combustion engine.

Amey, David L. (Birmingham, MI); Degner, Michael W. (Farmington Hills, MI)

2002-01-01T23:59:59.000Z

112

EPRI MOV Performance Prediction Program: Friction Separate Effects Test Report  

Science Conference Proceedings (OSTI)

The coefficient of sliding friction between the internal components of a gate valve is an important factor in determining the thrust required to operate the valve. An EPRI test program measured coefficients of friction between typical gate valve internal materials using specimens that duplicated the contact configurations occurring in valves.

1993-12-01T23:59:59.000Z

113

Methods for Measuring Friction  

Science Conference Proceedings (OSTI)

Table 1   Selected solid friction tests per ASTM standards...for Coefficient of Friction Vinyl and wool tiles (preparation only) Any apparatus E 303 (E-17 on traveled surfaces) Measuring Surface

114

An experimental study of the oil evolution in critical piston ring pack regions and the effects of piston and ring designs in an internal combustion engine utilizing two-dimensional laser induced fluorescence and the impact on maritime economics  

E-Print Network (OSTI)

Faced with increasing concern for lubricating, oil consumption and engine friction, it is critical to understand the oil transport mechanisms in the power cylinder system. Lubricating oil travels through distinct regions ...

Vokac, Adam, 1978-

2004-01-01T23:59:59.000Z

115

International Conference on Engineering Education August 6 -- 10, 2001 Oslo, Norway  

E-Print Network (OSTI)

Introduction of modern CAD-CAP-CAM technologies shortened the product development cycle and lowered production costs. To deliver new product faster and cheaper, engineers are forced to learn faster and more efficiently. Rapid development of information and communication technologies (ICT) enabled new tools for education and boosted distance learning tools. The goal of this paper is to give some ideas and results on how can ICT are used efficiently in engineering education, based on the experiences and international cooperation from Italy, Norway, Germany and Spain, as well as from Bosnia and Herzegovina, a country with undeveloped industry. On one side, we have industry on the level of fifties and on the opposite side we have ICT technologies, which can not be as slow as local industry development. The paper is based on experiences gathered through international project "Establishment of Phare Open and Distance Learning Centers in Bosnia and Herzegovina" and treats the development activities in the ODL Center at the Faculty of Mechanical Engineering in Zenica.

Is It Possible; Darko Petkovic; Samir Lemes; Mladen Jecmenica; Joan Vivancos Calvet

2001-01-01T23:59:59.000Z

116

Apparatus for controlling the air-fuel ratio in an internal combustion engine  

Science Conference Proceedings (OSTI)

Apparatus for controlling the air-fuel ratio in an internal combustion engine to substantially maintain the ratio at a predetermined value while the engine is operating under various load conditions. The engine has a carburetor with an air passageway through which air is drawn into the engine. Fuel is supplied to the carburetor through a fuel system and mixed with air passing through the carburetor. The presence of oxygen in the combustion products, which is a function of the air-fuel ratio of the mixture, is sensed and a first electrical signal representative of the oxygen content is supplied. The first electrical signal is compared with a predetermined reference level which is a function of the predetermined value to produce a second electrical signal having first and second signal elements, a first signal element being produced when the air-fuel ratio of the mixture is greater than the predetermined level and a second signal element being produced when the ratio is less than the level. A control responsive to the second electrical signal supplies to an air metering unit a control signal by which the quantity of air introduced into the fuel system is controlled. A change in the control signal is produced whenever the second electrical signal has a transition from one signal element to the other thereby for the air metering unit to change the quantity of air introduced into the fuel system conduit by an amount necessary to substantially maintain the air-fuel ratio at the predetermined value.

Gantzert, T.R.; Hicks, D.L.; Lindberg, A.W.

1981-07-21T23:59:59.000Z

117

Mixture of micronized coal powder with gaseous fuels for use in internal combustion engines  

DOE Patents (OSTI)

An improved fuel mixture for use in internal combustion engines is described. This fuel is an intimate mixture of micronized coal, having an average particle size of less than 100 microns, with a gaseous fuel selected from natural gas and coal-derived. The coal can be present from more than 0 percent to less than 100 percent, with generally the lower percentages being preferred. The addition of the coal to the gaseous fuel improves engine efficiency and power rating, and also decreases peak engine pressure allowing for higher compression ratios. An increase in the amount of the coal increases the oxides of sulfur while reducing the oxides of nitrogen in the exhaust. An increase in the amount of gas, on the other hand, increases the oxides of nitrogen but lowers oxides of sulfur. Accordingly, a preferred mixture will depend upon a particular application for the coal/gas fuel and thereby increases user fuel flexibility considerations. Modeling of the fuel mixture for use in a diesel engine is described. 3 figs., 3 tabs.

Carpenter, L.K.

1990-01-03T23:59:59.000Z

118

Integration of Radioisotope Heat Source with Stirling Engine and Cooler for Venus Internal-Structure Mission  

SciTech Connect

The primary mission goal is to perform long-term seismic measurements on Venus, to study its largely unknown internal structure. The principal problem is that most payload components cannot long survive Venus's harsh environment, 90 bars at 500 degrees C. To meet the mission life goal, such components must be protected by a refrigerated payload bay. JPL Investigators have proposed a mission concept employing a lander with a spherical payload bay cooled to 25 degrees C by a Stirling cooler powered by a radioisotope-heated Sitrling engine. To support JPL's mission study, NASA/Lewis and MTI have proposed a conceptual design for a hydraulically coupled Stirling engine and cooler, and Fairchild Space - with support of the Department of Energy - has proposed a design and integration scheme for a suitable radioisotope heat source. The key integration problem is to devise a simple, light-weight, and reliable scheme for forcing the radioisotope decay heat to flow through the Stirling engine during operation on Venus, but to reject that heat to the external environment when the Stirling engine and cooler are not operating (e.g., during the cruise phase, when the landers are surrounded by heat shields needed for protection during subsequent entry into the Venusian atmosphere.) A design and integration scheme for achieving these goals, together with results of detailed thermal analyses, are described in this paper. There are 7 copies in the file.

Schock, Alfred

1993-10-01T23:59:59.000Z

119

A coal-water slurry fueled internal combustion engine and method for operating same  

DOE Patents (OSTI)

An internal combustion engine fueled with a coal-water slurry is described. About 90 percent of the coal-water slurry charge utilized in the power cycle of the engine is directly injected into the main combustion chamber where it is ignited by a hot stream of combustion gases discharged from a pilot combustion chamber of a size less than about 10 percent of the total clearance volume of main combustion chamber with the piston at top dead center. The stream of hot combustion gases is provided by injecting less than about 10 percent of the total coal-water slurry charge into the pilot combustion chamber and using a portion of the air from the main combustion chamber that has been heated by the walls defining the pilot combustion chamber as the ignition source for the coal-water slurry injected into the pilot combustion chamber.

McMillian, M.H.

1992-12-31T23:59:59.000Z

120

Coal-water slurry fuel internal combustion engine and method for operating same  

SciTech Connect

An internal combustion engine fueled with a coal-water slurry is described. About 90 percent of the coal-water slurry charge utilized in the power cycle of the engine is directly injected into the main combustion chamber where it is ignited by a hot stream of combustion gases discharged from a pilot combustion chamber of a size less than about 10 percent of the total clearance volume of main combustion chamber with the piston at top dead center. The stream of hot combustion gases is provided by injecting less than about 10 percent of the total coal-water slurry charge into the pilot combustion chamber and using a portion of the air from the main combustion chamber that has been heated by the walls defining the pilot combustion chamber as the ignition source for the coal-water slurry injected into the pilot combustion chamber.

McMillian, Michael H. (Fairmont, WV)

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Wavelet Analysis of Cycle-to-Cycle Pressure Variations in an Internal Combustion Engine  

E-Print Network (OSTI)

Using a continuous wavelet transform we have analyzed the cycle-to-cycle variations of pressure in an internal combustion engine. The time series of maximum pressure variations are examined for different loading and their wavelet power spectrum is calculated for each load. From the wavelet power spectrum we detected the presence of long, intermediate and short-term periodicities in the pressure signal. It is found that depending on the load, the long and intermediate-term periodicities may span several cycles, whereas the short-period oscillations tend to appear intermittently. Knowledge of these periodicities may be useful to develop effective control strategies for efficient combustion.

Asok K. Sen; Grzegorz Litak; Rodolfo Taccani; Robert Radu

2006-07-19T23:59:59.000Z

122

Friction Stir Welding of Lightweight Vehicle Structures: Final Report  

Science Conference Proceedings (OSTI)

The purpose of this Cooperative Research and Development Agreement (CRADA) between UTBattelle, LLC and Ford Motor Company was to establish friction stir welding (FSW) and friction stir processing as viable options for use in construction of lightweight substructures for trucks and cars, including engine cradles, suspension sub frames, instrument panel supports, and intake manifolds.

Sanella, M.L.

2008-08-31T23:59:59.000Z

123

Micromachine friction test apparatus  

DOE Patents (OSTI)

A microelectromechanical (MEM) friction test apparatus is disclosed for determining static or dynamic friction in MEM devices. The friction test apparatus, formed by surface micromachining, is based on a friction pad supported at one end of a cantilevered beam, with the friction pad overlying a contact pad formed on the substrate. A first electrostatic actuator can be used to bring a lower surface of the friction pad into contact with an upper surface of the contact pad with a controlled and adjustable force of contact. A second electrostatic actuator can then be used to bend the cantilevered beam, thereby shortening its length and generating a relative motion between the two contacting surfaces. The displacement of the cantilevered beam can be measured optically and used to determine the static or dynamic friction, including frictional losses and the coefficient of friction between the surfaces. The test apparatus can also be used to assess the reliability of rubbing surfaces in MEM devices by producing and measuring wear of those surfaces. Finally, the friction test apparatus, which is small in size, can be used as an in situ process quality tool for improving the fabrication of MEM devices.

deBoer, Maarten P. (Albuquerque, NM); Redmond, James M. (Albuquerque, NM); Michalske, Terry A. (Cedar Crest, NM)

2002-01-01T23:59:59.000Z

124

Evaluation and silicon nitride internal combustion engine components. Final report, Phase I  

DOE Green Energy (OSTI)

The feasibility of silicon nitride (Si{sub 3}N{sub 4}) use in internal combustion engines was studied by testing three different components for wear resistance and lower reciprocating mass. The information obtained from these preliminary spin rig and engine tests indicates several design changes are necessary to survive high-stress engine applications. The three silicon nitride components tested were valve spring retainers, tappet rollers, and fuel pump push rod ends. Garrett Ceramic Components` gas-pressure sinterable Si{sub 3}N{sub 4} (GS-44) was used to fabricate the above components. Components were final machined from densified blanks that had been green formed by isostatic pressing of GS-44 granules. Spin rig testing of the valve spring retainers indicated that these Si{sub 3}N{sub 4} components could survive at high RPM levels (9,500) when teamed with silicon nitride valves and lower spring tension than standard titanium components. Silicon nitride tappet rollers showed no wear on roller O.D. or I.D. surfaces, steel axles and lifters; however, due to the uncrowned design of these particular rollers the cam lobes indicated wear after spin rig testing. Fuel pump push rod ends were successful at reducing wear on the cam lobe and rod end when tested on spin rigs and in real-world race applications.

Voldrich, W. [Allied-Signal Aerospace Co., Torrance, CA (United States). Garrett Ceramic Components Div.

1992-04-01T23:59:59.000Z

125

Comparative evaluation of acoustical noise levels of Soleq Evcort EV and ICE (internal combustion engine) counterpart  

DOE Green Energy (OSTI)

The Idaho National Engineering Laboratory (INEL) evaluates Ev propulsion systems and components for the US Department of Energy (DOE) Electric and Hybrid Vehicle (EHV) Program. This paper describes an INEL study which compares the exterior and interior acoustic noise levels of an electric vehicle to its internal combustion engine (ICE) counterpart base vehicle, under various operating conditions. The electric vehicle was a converted 1988 Ford Escort station wagon, retrofitted with a DC electric powertrain developed by Soleq Corporation. A comparably-equipped gasoline-fueled ICE-powered Ford Escort station wagon provided the baseline acoustic noise levels with which to compare the electric vehicle. Measurements of the interior and exterior noise levels were obtained using a Bruel and Kjaer (B K) Type 2231 Modular Precision Sound Level Meter. The tests were conducted in accordance with applicable Society of Automotive Engineer's (SAE) standard practices at Chrysler's Arizona Proving Grounds in Wittmann, Arizona. The results indicate that radiated interior and exterior acoustic noise levels of the electric vehicle were noticeably quieter under acceleration and idly conditions. However, under constant speed operation the electric and the ICE exhibited essentially equivalent interior and exterior noise levels. 8 refs., 2 tabs.

MacDowall, R.D.

1990-01-01T23:59:59.000Z

126

Running out of steam. Part III. Development blues. [Alternatives to automotive internal combustion engines  

SciTech Connect

The history is given of systems that have been looked upon alternately as either strong competitors or engineering curiosities in the revived search to replace the Otto-cycle power plant with a cleaner, more efficient, and equally reliable passenger car engine. These recent efforts are largely attempts to polish up old technologies that were around long before a single model-T rolled off Henry Ford's first assembly line. The first steam vehicle, for example, hit the road more than 200 years ago and over the years has undergone considerable refinement. But, in spite of this long history and with the exception of short bursts of enthusiasm, the development of a steam-powered passenger car has never been high on the automobile industry's list of priorities. Some clues are given as to why this is true and why a number of ''think tank'' reports published over the past few years on the future role of steam-driven cars have ranged from mildly optimistic to forthrightly pessimistic. Electric vehicles have had a somewhat parallel history. They were early competitors with the Otto engine, but, unlike the steam cars, they have never completely disappeared. Indeed, for some special uses, they have outperformed all varieties of internal combustion engines (I.C.E.). Further inroads into the Otto-cycle car market, however, depend upon improved car design and the advancement of battery technology, an area of research that has been painfully slow in yielding results. Were it not for the wide public interest in environmental and resource issues that has been translated into new laws dealing with air pollution and resource management, the auto industry would have been content to sit on its I.C.E. for some time to come.

Reitze, A.W. Jr.

1977-01-01T23:59:59.000Z

127

A Review of Sub-Scale Test Methods to Evaluate the Friction and Wear of Ring and Liner Materials for Spark- and Compression Ignition Engines  

Science Conference Proceedings (OSTI)

A review was conducted of past laboratory-scale test methods and to assess their validity for ranking materials and lubricants for use as piston and liner materials in compression-ignition (CI) and spark-ignition (SI) engines. Most of the previous work was aimed at simulating SI engine environments. This report begins with a discussion of the numerous factors that can affect the validity of an approach to simulating engine conditions in a laboratory. These include not only mechanical, chemical and thermal factors, but also human factors as regards how the vehicle is operated and maintained. The next section provides an annotated review of open literature publications that address the issues of laboratory simulation of engine components. A comparison of these studies indicates a lack of sufficient standardization in procedures to enable a systematic comparison of one publication to another. There were just a few studies that compared several laboratory test methods to engine test results, and these indicated that some test methods correlate, at least qualitatively, better than others. The last section provides a series of recommendations for improving the accuracy and validity of laboratory-scale simulations of engine behavior. It became clear that much of the engine wear damage occurs during start-up when the engine is cold, and this calls into the question the usefulness of test methods that attempt to simulate steady-state running conditions. It is recommended that a new standard test method, perhaps developed with the help of the ASTM wear and erosion committee, be developed. It would use cold start-up conditions in the presence of degraded oil, or simulated degraded oil.

Blau, P.J.

2002-01-22T23:59:59.000Z

128

Alternative Fuel Pilot Plant & Hydrogen Internal Combustion Engine Vehicle Testing  

NLE Websites -- All DOE Office Websites (Extended Search)

RESEARCH & DEVELOPMENT RESEARCH & DEVELOPMENT Science Arizona Public Service Alternative Fuel Pilot Plant & Hydrogen Internal Combustion Engine Vehicle Testing Alternative Fuel Pilot Plant The Arizona Public Service Alternative Fuel Pilot Plant is a model alternative fuel refueling system, dispensing hydrogen, compressed natural gas (CNG), and hydrogen/ CNG blends (HCNG). The plant is used daily to fuel vehicles operated in Arizona Public Service's fleet. Hydrogen Subsystem The plant's hydrogen system consists of production, compression, storage, and dispensing. The hydrogen produced is suitable for use in fuel cell-powered vehicles, for which the minimum hydrogen purity goal is 99.999%. Hydrogen is produced using an electrolysis process that separates water into hydrogen and oxygen. At present, the hydrogen is

129

NREL Showcases Hydrogen Internal Combustion Engine Bus, Helps DOE Set Standards for Outreach (Fact Sheet)  

SciTech Connect

This fact sheet describes the National Renewable Energy Laboratory's (NREL's) accomplishments in showcasing a Ford hydrogen-powered internal combustion engine (H2ICE) bus at The Taste of Colorado festival in Denver. NREL started using its U.S. Department of Energy-funded H2ICE bus in May 2010 as the primary shuttle vehicle for VIP visitors, members of the media, and new employees. In September 2010, NREL featured the bus at The Taste of Colorado. This was the first major outreach event for the bus. NREL's educational brochure, vehicle wrap designs, and outreach efforts serve as a model for other organizations with DOE-funded H2ICE buses. Work was performed by the Hydrogen Education Group and Market Transformation Group in the Hydrogen Technologies and Systems Center.

2010-11-01T23:59:59.000Z

130

Welding – Friction Stir  

Friction welding that uses a contact rotating tool creates frictional heating of an adjacent work piece. The process employs a mixer where the two pieces touch, an area called the plastic zone, to avoid the undesirable joining (e.g. alloying) of the ...

131

Estimating the impact on fuel tax revenues from a changing light vehicle fleet with increased advanced internal combustion engine vehicles and electric vehicles.  

E-Print Network (OSTI)

??Advanced fuel economies in both traditional internal combustion engine vehicles (ICEs) and electric vehicles (EVs) have a strong influence on transportation revenue by reducing fuel… (more)

Hall, Andrea Lynn

2013-01-01T23:59:59.000Z

132

A research plan to study emissions from small internal combustion engines. Final report Sep 78-Sep 79  

SciTech Connect

The report examines some of the requirements for investigating the environmental status of small internal combustion (IC) engines. These engines range in size from 1.5 to 15 hp and power a variety of equipment operated by homeowners and industry. With EPA's general growing concern of identifying sources of potentially carcinogenic emissions, a possibility exists that these small IC engines are a problem source. Research to characterize emissions from IC engines has largely been limited to critical pollutants, even though the small IC engine is an incomplete combustor. It follows that some carcinogens and other hazardous compounds are probable. The basic requirements addressed in the report include analytical equipment, experimental systems design, and statistical experimental design.

Murrell, J.W.

1980-04-01T23:59:59.000Z

133

CAM/LIFTER forces and friction  

DOE Green Energy (OSTI)

This report details the procedures used to measure the cam/lifter forces and friction. The present effort employed a Cummins LTA-10, and focuses on measurements and dynamic modeling of the injector train. The program was sponsored by the US Department of Energy in support of advanced diesel engine technology. The injector train was instrumented to record the instantaneous roller speed, roller pin friction torque, pushrod force, injector link force and cam speed. These measurements, together with lift profiles for pushrod and injector link displacement, enabled the friction work loss in the injector train to be determined. Other significant design criteria such as camshaft roller follower slippage and maximum loads on components were also determined. Future efforts will concentrate on the dynamic model, with tests run as required for correlation.

Gabbey, D.J.; Lee, J.; Patterson, D.J.

1992-02-01T23:59:59.000Z

134

http://rcc.its.psu.edu/hpc Simulation of In-Cylinder Processes in Internal Combustion Engines  

E-Print Network (OSTI)

http://rcc.its.psu.edu/hpc Simulation of In-Cylinder Processes in Internal Combustion Engines into clean and efficient turbulent combustion remains imperative. A single grand challenge was identified in a 2006 DOE workshop on clean and efficient combustion of 21st century transportation fuels [1]: "The

Bjørnstad, Ottar Nordal

135

Nitrogen enriched combustion of a natural gas internal combustion engine to reduce NO.sub.x emissions  

DOE Green Energy (OSTI)

A method and system for reducing nitrous oxide emissions from an internal combustion engine. An input gas stream of natural gas includes a nitrogen gas enrichment which reduces nitrous oxide emissions. In addition ignition timing for gas combustion is advanced to improve FCE while maintaining lower nitrous oxide emissions.

Biruduganti, Munidhar S. (Naperville, IL); Gupta, Sreenath Borra (Naperville, IL); Sekar, R. Raj (Naperville, IL); McConnell, Steven S. (Shorewood, IL)

2008-11-25T23:59:59.000Z

136

EngOpt 2012 -International Conference on Engineering Optimization Rio de Janeiro, Brazil, 1-5 July 2012.  

E-Print Network (OSTI)

EngOpt 2012 - International Conference on Engineering Optimization Rio de Janeiro, Brazil, 1-5 July, 39401-089 - Montes Claros - MG, Brazil E-mail: nilson.brito@unimontes.br Departamento de Matem´atica, Universidade Federal de Ouro Preto, 35400-000 - Ouro Preto - MG, Brazil E-mail: anderson

Cruz, Frederico

137

The Expro Engineering Sponsorship Programme Expro International Group is an upstream oil and gas sector service company  

E-Print Network (OSTI)

and process flow from high-value oil and gas wells, from exploration and appraisal through to mature fieldThe Expro Engineering Sponsorship Programme Expro International Group is an upstream oil and gas for the development and delivery of innovative technologies to meet the needs of the oil and gas industry globally

Painter, Kevin

138

1 Copyright 2010 by ASME ASME 2010 International Mechanical Engineering Congress and Exposition  

E-Print Network (OSTI)

processes and a conceptual Liquid Piston Stirling Engine are immediate applications. Proposed is a thin

Van de Ven, James D.

139

1 Copyright 2010 by ASME Proceedings of the ASME 2010 International Design Engineering Technical Conferences &  

E-Print Network (OSTI)

-dof linkages, cams, and gear trains, such as the Ross-yoke Stirling engine mechanism shown in Figure 1 trains. #12;2 Copyright © 2010 by ASME Figure 1. Ross-Yoke Stirling Engine Mechanism www.ent.ohiou.edu/~urieli/stirling/engines. For example, Figure 11 shows a screen shot of a geared nine-bar Stirling engine mechanism animation made

Williams II, Robert L.

140

Status of Stellite 6 friction testing  

SciTech Connect

For the past several years, researchers at the Idaho National Engineering and Environmental Laboratory, under the sponsorship of the US Nuclear Regulatory Commission, Office of Nuclear Regulatory Research, have been investigating the performance of motor-operated valves subjected to design basis flow and pressure loads. Part of this research addresses the friction that occurs at the interface between the valve disc and the valve body seats during operation of a gate valve. In most gate valves, these surfaces are hardfaced with Stellite 6, a cobalt-based alloy. Analytical methods exist for predicting the thrust needed to operate these valves at specific pressure conditions. To produce accurate valve thrust predictions, the analyst must have a reasonably accurate, though conservative, estimate of the coefficient of friction at the disc-to-seat interface. One of the questions that remains to be answered is whether, and to what extent, aging of the disc and seat surfaces effects the disc-to-seat coefficient of friction. Specifically, does the environment in a nuclear plants piping system cause the accumulation of an oxide film on these surfaces that increases the coefficient of friction; and if so, how great is the increase? This paper presents results of specimen tests addressing this issue, with emphasis on the following: (1) the characteristics and thickness of the oxide film that develops on Stellite 6 as it ages; (2) the change in the friction coefficient of Stellite 6 as it ages, including the question of whether the friction coefficient eventually reaches a plateau; and (3) the effect in-service cycling has on the characteristics and thickness of the oxide film and on the friction coefficient.

Watkins, J.C.; DeWall, K.G. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab.; Weidenhamer, G.H. [Nuclear Regulatory Commission (United States)

1998-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

A retrospective survey of the use of laboratory tests to simulate internal combustion engine materials tribology problems  

DOE Green Energy (OSTI)

Progress in the Field of tribology strongly parallels, and has always been strongly driven by, developments and needs in transportation and related industries. Testing of candidate materials for internal combustion engine applications has historically taken several routes: (1) replacement of parts in actual engines subjected to daily use, (2) testing in special, instrumented test engines, (3) and simulative testing in laboratory tribometers using relatively simple specimens. The advantages and disadvantages of each approach are reviewed using historical examples. A four-decade, retrospective survey of the tribomaterials literature focused on the effectiveness of laboratory simulations for engine materials screening. Guidelines for designing and ducting successful tribology laboratory simulations will be discussed. These concepts were used to design a valve wear simulator at Oak Ridge National Laboratory.

Blau, P.J.

1992-12-31T23:59:59.000Z

142

Friction stir welding tool  

DOE Patents (OSTI)

A friction stir welding tool is described and which includes a shank portion; a shoulder portion which is releasably engageable with the shank portion; and a pin which is releasably engageable with the shoulder portion.

Tolle; Charles R. (Idaho Falls, ID), Clark; Denis E. (Idaho Falls, ID), Barnes; Timothy A. (Ammon, ID)

2008-04-15T23:59:59.000Z

143

Topological Complexity of Frictional Interfaces: Friction Networks  

E-Print Network (OSTI)

Through research conducted in this study, a network approach to the correlation patterns of void spaces in rough fractures (crack type II) was developed. We characterized friction networks with several networks characteristics. The correlation among network properties with the fracture permeability is the result of friction networks. The revealed hubs in the complex aperture networks confirmed the importance of highly correlated groups to conduct the highlighted features of the dynamical aperture field. We found that there is a universal power law between the nodes' degree and motifs frequency (for triangles it reads T(k)\\proptok{\\beta} ({\\beta} \\approx2\\pm0.3)). The investigation of localization effects on eigenvectors shows a remarkable difference in parallel and perpendicular aperture patches. Furthermore, we estimate the rate of stored energy in asperities so that we found that the rate of radiated energy is higher in parallel friction networks than it is in transverse directions. The final part of our research highlights 4 point sub-graph distribution and its correlation with fluid flow. For shear rupture, we observed a similar trend in sub-graph distribution, resulting from parallel and transversal aperture profiles (a superfamily phenomenon).

H. O. Ghaffari; R. P. Young

2011-05-21T23:59:59.000Z

144

Method and device for frictional welding  

SciTech Connect

A method for friction welding that produces a seal having essentially no gas porosity, comprises two rotationally symmetric, generally cylindrical members, spaced apart and coaxially aligned, that are rotated with respect to each other and brought together under high pressure. One member is preferably a generally cylindrical cannister that stores uranium within its hollow walls. The other member is preferably a generally cylindrical, hollow weld ring. An annular channel formed in the weld ring functions as an internal flash trap and is uniquely designed so that substantially all of the welding flash generated from the friction welding is directed into the channel's recessed bottom. Also, the channel design limits distortion of the two members during the friction welding process, further contributing to the complete seal that is obtained.

Peacock, Harold B. (867 N. Belair Rd., Evans, GA 30809)

1992-01-01T23:59:59.000Z

145

Method and device for frictional welding  

DOE Patents (OSTI)

A method is described for friction welding that produces a seal having essentially no gas porosity, comprises two rotationally symmetric, generally cylindrical members, spaced apart and coaxially aligned, that are rotated with respect to each other and brought together under high pressure. One member is preferably a generally cylindrical canister that stores uranium within its hollow walls. The other member is preferably a generally cylindrical, hollow weld ring. An annular channel formed in the weld ring functions as an internal flash trap and is uniquely designed so that substantially all of the welding flash generated from the friction welding is directed into the channel's recessed bottom. Also, the channel design limits distortion of the two members during the friction welding process, further contributing to the complete seal that is obtained. 5 figs.

Peacock, H.B.

1992-10-13T23:59:59.000Z

146

Method and device for frictional welding  

DOE Patents (OSTI)

A method for friction welding that produces a seal having essentially no gas porosity, comprises two rotationally symmetric, generally cylindrical members, spaced apart and coaxially aligned, that are rotated with respect to each other and brought together under high pressure. One member is preferably a generally cylindrical cannister that stores uranium within its hollow walls. The other member is preferably a generally cylindrical, hollow weld ring. An annular channel formed in the weld ring functions as an internal flash trap and is uniquely designed so that substantially all of the welding flash generated from the friction welding is directed into the channel`s recessed bottom. Also, the channel design limits distortion of the two members during the friction welding, process, further contributing to the complete seal that is obtained.

Peacock, H.B.

1991-01-01T23:59:59.000Z

147

A comparison between direct spark ignition and prechamber ignition in an internal combustion engine  

DOE Green Energy (OSTI)

We simulated the flow field and flame propagation near top dead center in a generic large-bore internal combustion engine using the COYOTE computer program, which is based on the full Navier-Stokes equations for a fluid mixture. The combustion chamber is a right circular cylinder, and the main charge is uniformly premixed. The calculations are axisymmetric. The results illustrate the differences in flow patterns, flame propagation, and thermal NO production between ignition with a spark plug and with a small prechamber. In the spark-ignited case, the flame propagates away from the spark plug approximately as a segment of a spherical surface, just as expected. With the prechamber, a high speed jet of hot combustion products shoots into the main chamber, quickly producing a large flame sheet that spreads along the piston face. The prechamber run consumes all of the fuel in half the time required by the spark-ignited case. The two cases produce comparable amounts of thermal NO at the end of fuel combustion.

Cloutman, L.D.

1993-12-03T23:59:59.000Z

148

Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Engineering Engineering1354608000000EngineeringSome of these resources are LANL-only and will require Remote Access./No/Questions? 667-5809library@lanl.gov Engineering Some of these resources are LANL-only and will require Remote Access. Key Resources Reference Standards Data Sources Organizations Journals Key Resources Engineering Village Includes Engineering Index (Ei) and Compendex Knovel Handbooks, databases, and eBooks integrated with analytical and search tools IEEE Xplore Full text access to technical literature, standards, and conference proceedings in engineering and technology SPIE Digital Library Full-text papers from SPIE journals and proceedings published since 1998; subject coverage includes optics, photonics, electronic imaging, visual information processing, biomedical optics, lasers, and

149

Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrodynamics Bioscience, Biosecurity, Health Chemical Science Earth, Space Sciences Energy Engineering High Energy Density Plasmas, Fluids Information Science, Computing,...

150

Cold start fuel management of port-fuel-injected internal combustion engines  

E-Print Network (OSTI)

The purpose of this study is to investigate how changes in fueling strategy in the second cycle of engine operation influence the delivered charge fuel mass and engine out hydrocarbon (EOHC) emissions in that and subsequent ...

Cuseo, James M. (James Michael)

2005-01-01T23:59:59.000Z

151

Proceedings of ASME 2009 2009 ASME International Mechanical Engineering Congress and Exposition  

E-Print Network (OSTI)

of the liquid piston includes the fluidyne Stirling engine, also used for water pumping [2-4]. A preliminary-to-Back, Liquid Piston Stirling Engine for Water Pumping," Journal of Energy in Southern Africa, 13(2), pp. 36 Energy, 13(2), pp. 261-268. [4] West, C. D., 1983, Liquid Piston Stirling Engines, Van Nostrand Reinhold

Van de Ven, James D.

152

Creation Plaza, Technical Section, International Academic Exchange Office, Graduate School of Engineering., Nagoya University  

E-Print Network (OSTI)

of California, Berkeley, Berkeley, CA 94720 Stirling Engines for Distributed Low-Cost Solar concentrators, integrated with free-piston Stirling engine devices incorporating integrated electric generation-piston Stirling engine prototype. A very low loss resonant displacer piston is designed for the system using

Takahashi, Ryo

153

Thermodynamic modeling of performance of a Miller cycle with engine speed and variable specific heat ratio of working fluid  

Science Conference Proceedings (OSTI)

The performance of an air standard Miller cycle is analyzed using finite-time thermodynamics. The results show that if the compression ratio is less than certain value, the increase of the value of the specific heat ratio will make the power output bigger. ... Keywords: Finite-time processes, Friction, Heat resistance, Internal irreversibility, Miller heat-engine

Rahim Ebrahimi

2011-09-01T23:59:59.000Z

154

Apparatus for closed-loop combustion control in internal combustion engines  

SciTech Connect

Schematically disclosed is an engine control apparatus wherein cylinder pressure is sensed before and after the top dead center position. Desired cylinder pressure curves are stored in a microcomputer for a range of engine speed-load combinations. By electrically comparing the actual pressure-time curve with the desired pressure curve for the existing speed-load combination it should be possible to generate an error signal representing deviation of actual engine performance from the desired performance, i.e., a permissible plus or minus band following the desired curve. The invention would provide a control action using only three parameters, namely engine speed, engine load and cylinder pressure.

Cheklich, G.E.

1983-03-10T23:59:59.000Z

155

Multi-dimensional computation of compressible reacting flows through porous media to apply to Internal Combustion Engine simulation  

Science Conference Proceedings (OSTI)

In this work, a new multi-dimensional Finite Volume (FV) solver of partial differential equations (PDEs) for compressible and reacting flows through porous media has been developed. The solver makes use of a pseudo-staggered arrangement, in order to ... Keywords: CFD, Computational fluid dynamics, DPF, Diesel exhaust after-treatment simulation, Diesel particulate filters, ICE, Internal combustion engines, Numerical methods, Porous media solver

F. Piscaglia; A. Montorfano; A. Onorati

2010-10-01T23:59:59.000Z

156

International Joint Workshop of the Engine Emissions R&D Cluster  

NLE Websites -- All DOE Office Websites (Extended Search)

Event Announcements The 3rd Joint Workshop will be held in Japan in 2014. Detailed information will be provided soon. Who Should Attend? Potential participants will be engineers...

157

2011 International Conference on Electrical Engineering and Informatics 17-19 July 2011, Bandung, Indonesia  

E-Print Network (OSTI)

, Indonesia CAMSHIFT Improvement on Multi-Hue and Multi-Object Tracking P. Hidayatullah*, H. Konik** * Computer Engineering Department, Bandung State Polytechnic, Bandung, Indonesia ** Laboratoire Hubert Curien

Paris-Sud XI, Université de

158

Friction-Stir Processing (Models)  

Science Conference Proceedings (OSTI)

Oct 29, 2009... investigating the dynamic stress strain response of HSLA-65 under conditions ... Survey of Current Modeling Techniques for Friction Stir Welding: Dave ... friction stir welding (FSW) demands an appropriate level of accuracy, ...

159

Friction Stir Welding of Pipeline Steels  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2013 TMS Annual Meeting & Exhibition. Symposium , Friction Stir Welding and Processing VII. Presentation Title, Friction Stir ...

160

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING Int. J. Numer. Meth. Engng 2006; 65:12691309  

E-Print Network (OSTI)

Engineering and Sciences (ICES), The University of Texas at Austin, Austin, TX 78712, U.S.A. 2Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, Austin, TX 78712, U.S.A. 3Baker. The refinement strategy is an extension of a fully automatic, energy-norm based, hp-adaptive algorithm. We

Torres-Verdín, Carlos

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Electrical generation plant design practice intern experience at Power Systems Engineering, Inc.: an internship report  

E-Print Network (OSTI)

A survey of the author's internship experience with Power Systems Engineering, Inc. during the period September 1980 through August, 1981 is presented. During this onr year internship, the author was assigned to two engineering projects. One involved design of a 480 MW power plant. The other was the design of a 8.2 MW induction generator for cogeneration. The author's activities during this period can be categorized into two major areas. First, technically oriented, he designed protective relaying and SCADA systems for the projects. Secondly, he assisted the Project Manager in project management activities such as project progress and cost control. The intent of this report is to prepare a training manual for PSE young engineers. It covers both technical guidelines for power plant design and nonacademic professional codes. Although this report is primarily written for young engineers, it can also be used as a reference by older and experienced engineers.

Lee, Ting-Zern Joe, 1950-

1981-12-01T23:59:59.000Z

162

Web Information Systems Engineering - WISE 2010 Workshops: WISE 2010 International Symposium WISS, and International Workshops CISE, MBC, Hong Kong, ... Applications, incl. Internet/Web, and HCI), 1st edition  

Science Conference Proceedings (OSTI)

This book contains the carefully selected and reviewed papers presented at three satellite events that were held in conjunction with the 11th International Conference on Web Information Systems Engineering, WISE 2010, in Hong Kong, China, in December ...

Dickson K. W. Chiu; Ladjel Bellatreche; Hideyasu Sasaki; Ho-fung Leung; Shing-Chi Cheung; Haiyang Hu; Jie Shao

2011-11-01T23:59:59.000Z

163

The effect of surface finish on piston ring-pack performance in advanced reciprocating engine systems  

E-Print Network (OSTI)

Frictional losses in the piston ring-pack of an engine account for approximately 20% of the total frictional losses within an engine. Methods of surface texture optimization were investigated to reduce piston ring-pack ...

Jocsak, Jeffrey (Jeffrey Alan)

2005-01-01T23:59:59.000Z

164

Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Engineering Lawrence Livermore National Laboratory Home Technologies Core Competencies Showcase Careers Partnerships About Advanced Manufacturing Developing high-performance materials, devices, components, and assemblies enabled by innovative design tools and novel manufacturing techniques Learn more Applied Electromagnetics Supporting the development of electromagnetic systems that are pervasive and paramount to the greater National Security community. Learn more Data Sciences Enabling better decisions through the development and application of state-of-the-art techniques in machine learning, statistics, and decision sciences Learn more Precision Engineering Embracing determinism to guide rigorous design, construction, and metrology of mechatronic systems, instruments, and manufactured components

165

High Performance Scientific and Engineering Computing: Proceedings of the International Fortwihr Conference on Hpsec, Munich, March 16-18, 1998, 1st edition  

Science Conference Proceedings (OSTI)

From the Publisher:This volume contains the proceedings of an international conference on high performance scientific and engineering computing held in Munich in March 1998 and organized by FORTWIHR, the Bavarian Consortium for High Performance Scientific ...

Hans-Joachim -J Bungartz; F. Durst; C. Zenger

1999-01-01T23:59:59.000Z

166

NREL Showcases Hydrogen Internal Combustion Engine Bus, Helps DOE Set Standards for Outreach (Fact Sheet), Hydrogen and Fuel Cell Technical Highlights (HFCTH)  

NLE Websites -- All DOE Office Websites (Extended Search)

557 * November 2010 557 * November 2010 NREL Showcases Hydrogen Internal Combustion Engine Bus, Helps DOE Set Standards for Outreach National Renewable Energy Laboratory (NREL) Teams: Hydrogen Education, Melanie Caton; Market Transformation, Michael Ulsh Accomplishment: NREL started using its Ford hydrogen-powered internal combustion engine (H 2 ICE) bus in May 2010 as the primary shuttle vehicle for VIP visitors, members of the media, and new employees. As the first national laboratory to receive such a bus, NREL

167

Fail-safe coolant thermostat system for an internal combustion engine  

SciTech Connect

This patent describes an improvement in a device for controlling the flow of cooling fluid between a fluid-cooled engine and a radiator, wherein a primary passage is provided with a thermostat that normally controls the flow of cooling fluid between the engine and the radiator. It comprises: a bypass passage connected in parallel with the primary passage and thermostat; a control valve contained within the bypass passage, the valve comprising a solenoid operated cup-shaped valve body and means for continually urging open the valve toward an open position; and means for de-energizing the solenoid for positioning the control valve in an open condition when either the engine is not operating or the cooling fluid temperature exceeds a positioning the control valve in a closed condition when the engine is operating and the cooling fluid temperature is below the predetermined level.

Shelton, V.E.

1990-07-24T23:59:59.000Z

168

International Symposium on Air Breathing Engines, 8th, Cincinnati, OH, June 14-19, 1987, Proceedings  

SciTech Connect

The present conference on air-breathing aircraft engine technology considers topics in inlet design, radial-flow turbomachinery, fuel injection and combustion systems, axial flow compressor design and performance, ramjet configurations, turbine flow phenomena, engine control and service life, fluid flow-related problems, engine diagnostic methods, propfan design, combustor performance and pollutant chemistry, combustion dynamics, and engine system analysis. Attention is given to thrust-vectoring systems, supersonic missile air intakes, three-dimensional centrifugal compressors, airblast atomizers, secondary flows in axial flow compressors, axial compressor blade tip clearance flows, hydrogen scramjets with sidewall injection, the performance of a variable-geometry turbine, advanced tip clearance control systems, rotary jet mixing, fan blade aeroelastic behavior, flow dynamics in combustion processes, and the technology of low cost turbomachinery.

Billig, F.S.

1987-01-01T23:59:59.000Z

169

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING Int. J. Numer. Meth. Engng 2010; 81:12591280  

E-Print Network (OSTI)

of Petroleum and Geosystems Engineering, University of Texas, Austin, TX 78712, U.S.A. SUMMARY The mechanical] was proposed in [11]. DDA employs minimization of potential energy and the penalty method to solve

Patzek, Tadeusz W.

170

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING Int. J. Numer. Meth. Engng (2009)  

E-Print Network (OSTI)

of Petroleum and Geosystems Engineering, University of Texas, Austin, TX 78712, U.S.A. SUMMARY The mechanical] was proposed in [11]. DDA employs minimization of potential energy and the penalty method to solve

Patzek, Tadeusz W.

171

Proceedings of the 2nd International Convention on Rehabilitation Engineering & Assistive Technology  

Science Conference Proceedings (OSTI)

Assistive and Rehabilitative Technologies (ART) are the systematic applications of scientific and engineering principles to improve the quality of life for people with disabilities. Though the providing of technology needed to accomplish tasks that were ...

Pairash Thajchayapong; Zen KOH; Wantanee PHANTACHAT; Wei Tech ANG

2008-05-01T23:59:59.000Z

172

Proceedings of IMECE2005 2005 ASME International Mechanical Engineering Congress and Exposition  

E-Print Network (OSTI)

OF VEHICLES Akira Okamoto Department of Electrical and Computer Engineering University of Idaho Moscow, Idaho of Idaho Moscow, Idaho 83843-0902 U.S.A dedwards@uidaho.edu ABSTRACT Various control algorithms have been

Idaho, University of

173

ACEEE International Journal on Electrical and Power Engineering, Vol. 1, No. 1, Jan 2010 2010 ACEEE  

E-Print Network (OSTI)

ACEEE DOI: 01.ijepe.01.01.06 Direct Model Reference Adaptive Internal Model Controller for DFIG Wind internal model Controller, MIT Rule, DFIG, wind farms. NOMENCLATURE sV =stator voltage [V] sR =stator-third of China's vast landmass is suffering from acid rain caused by its rapid industrial growth. DFIG

Paris-Sud XI, Université de

174

Performance, Efficiency, and Emissions Characterization of Reciprocating Internal Combustion Engines Fueled with Hydrogen/Natural Gas Blends  

Science Conference Proceedings (OSTI)

Hydrogen is an attractive fuel source not only because it is abundant and renewable but also because it produces almost zero regulated emissions. Internal combustion engines fueled by compressed natural gas (CNG) are operated throughout a variety of industries in a number of mobile and stationary applications. While CNG engines offer many advantages over conventional gasoline and diesel combustion engines, CNG engine performance can be substantially improved in the lean operating region. Lean operation has a number of benefits, the most notable of which is reduced emissions. However, the extremely low flame propagation velocities of CNG greatly restrict the lean operating limits of CNG engines. Hydrogen, however, has a high flame speed and a wide operating limit that extends into the lean region. The addition of hydrogen to a CNG engine makes it a viable and economical method to significantly extend the lean operating limit and thereby improve performance and reduce emissions. Drawbacks of hydrogen as a fuel source, however, include lower power density due to a lower heating value per unit volume as compared to CNG, and susceptibility to pre-ignition and engine knock due to wide flammability limits and low minimum ignition energy. Combining hydrogen with CNG, however, overcomes the drawbacks inherent in each fuel type. Objectives of the current study were to evaluate the feasibility of using blends of hydrogen and natural gas as a fuel for conventional natural gas engines. The experiment and data analysis included evaluation of engine performance, efficiency, and emissions along with detailed in-cylinder measurements of key physical parameters. This provided a detailed knowledge base of the impact of using hydrogen/natural gas blends. A four-stroke, 4.2 L, V-6 naturally aspirated natural gas engine coupled to an eddy current dynamometer was used to measure the impact of hydrogen/natural gas blends on performance, thermodynamic efficiency and exhaust gas emissions in a reciprocating four stroke cycle engine. The test matrix varied engine load and air-to-fuel ratio at throttle openings of 50% and 100% at equivalence ratios of 1.00 and 0.90 for hydrogen percentages of 10%, 20% and 30% by volume. In addition, tests were performed at 100% throttle opening, with an equivalence ratio of 0.98 and a hydrogen blend of 20% to further investigate CO emission variations. Data analysis indicated that the use of hydrogen/natural gas fuel blend penalizes the engine operation with a 1.5 to 2.0% decrease in torque, but provided up to a 36% reduction in CO, a 30% reduction in NOX, and a 5% increase in brake thermal efficiency. These results concur with previous results published in the open literature. Further reduction in emissions can be obtained by retarding the ignition timing.

Kirby S. Chapman; Amar Patil

2007-06-30T23:59:59.000Z

175

Fundamental limitations of non-thermal plasma processing for internal combustion engine NO{sub x} control  

DOE Green Energy (OSTI)

This paper discusses the physics and chemistry of non-thermal plasma processing for post-combustion NO{sub x} control in internal combustion engines. A comparison of electron beam and electrical discharge processing is made regarding their power consumption, radical production, NO{sub x} removal mechanisms, and by product formation. Can non-thermal deNO{sub x} operate efficiently without additives or catalysts? How much electrical power does it cost to operate? What are the by-products of the process? This paper addresses these fundamental issues based on an analysis of the electron-molecule processes and chemical kinetics.

Penetrante, B.M.

1993-08-19T23:59:59.000Z

176

Internal Technical Report, Low-To-Moderate Temperature Reservoir Engineering Research Program - Fiscal Year 1982  

DOE Green Energy (OSTI)

Numerous low (<90 C) to moderate (90 C-150 C) geothermal resources occur in many areas of the United States. The reservoir research conducted at the Idaho National Engineering Laboratory (INEL) is designed to develop innovative techniques that can be used to evaluate reservoir characteristics and improve reservoir management for low-to-moderate temperature resources. The purpose of this report is to review the program accomplishments for FY 1982 and present the initial data and results obtained from the ongoing research program. The project tasks reported in this document are: (1) Low-To-Moderate Temperature Hydrothermal Reservoir Engineering Handbook; and (2) Reservoir Assessment Technique Development--data analysis and reaction kinetics.

Russell, B.F.; Dolenc, M.R.; Downs, W.F.; Hull, L.C.

1982-09-01T23:59:59.000Z

177

Integrated Advanced Reciprocating Internal Combustion Engine System for Increased Utilization of Gaseous Opportunity Fuels  

SciTech Connect

The project is addressing barriers to or opportunities for increasing distributed generation (DG)/combined heat and power (CHP) use in industrial applications using renewable/opportunity fuels. This project brings together novel gas quality sensor (GQS) technology with engine management for opportunity fuels such as landfill gas, digester gas and coal bed methane. By providing the capability for near real-time monitoring of the composition of these opportunity fuels, the GQS output can be used to improve the performance, increase efficiency, raise system reliability, and provide improved project economics and reduced emissions for engines used in distributed generation and combined heat and power.

Pratapas, John; Zelepouga, Serguei; Gnatenko, Vitaliy; Saveliev, Alexei; Jangale, Vilas; Li, Hailin; Getz, Timothy; Mather, Daniel

2013-08-31T23:59:59.000Z

178

High-speed video observation and on-line measurements of oil aeration in an internal combustion engine  

E-Print Network (OSTI)

Along the oil's journey through the oil lube system, the oil lubricates, cools, removes impurities, supports load, and minimizes friction. At the end of the oil's journey it returns to the sump where it remains nearly ...

Manz, Devon L

2005-01-01T23:59:59.000Z

179

Materials Reliability Program: San Onofre Nuclear Generating Station Reactor Vessel Internals Management Engineering Program (MRP-303)  

Science Conference Proceedings (OSTI)

All operating pressurized water reactors must have a reactor vessel internals aging management document in place by December 2011 according to the mandatory requirement under Nuclear Energy Institute (NEI) 03-08. This program should be developed to meet the guidance provided by Materials Reliability Program (MRP) -227, Rev. 0, Pressurized Water Reactor Internals Inspection and Evaluation Guidelines. For non-license renewal plants, the requirements are valid within the current license period, and the Elec...

2011-02-28T23:59:59.000Z

180

Proceedings of the 2008 international workshop on Software Engineering in east and south europe  

Science Conference Proceedings (OSTI)

It is our great pleasure to welcome you to the Software Engineering in East and South Europe workshop -- SEESE'08. East and South European countries are going through a process of intensive changes and ICT plays an important role in supporting ...

Ivica Crnkovi?; Jerzy Nawrocki

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

International Conference on Earthquake Engineering and Seismology (ICEES 2011), NUST, Islamabad, Pakistan  

E-Print Network (OSTI)

, Pakistan April 25-26, 2011 Post-Event Reconstruction in Asia since 1999: An Overview Focusing on the Social, Lahore, Pakistan (siddiq.akbar@uet.edu.pk ) Abstract The concentration of human population in Asia, Islamabad, Pakistan April 25-26, 2011 Considering that seismology and earthquake engineering had taken roots

Brest, Université de

182

Feasibility test on compounding the internal combustion engine for automotive vehicles, Task II. Final report  

DOE Green Energy (OSTI)

The organic Rankine bottoming cycle can be considered for various automobile and truck applications. The most attractive use, however, is in large, heavy-duty diesel trucks for long distance hauling. Here, the engine load and speed requirements are nearly constant over a large portion of the operating hours, and high mileages are accumulated. Thus, the potential fuel savings are sufficient to justify the added cost of a bottoming cycle system. A conceptual design study of compounding the diesel truck engine with an ORCS was made and the results of the study are presented. Based on the results of the conceptual design study which showed a 15 percent fuel economy improvement potential over the duty cycle, an early feasibility demonstration test of the system was initiated. The demonstration system uses a Mack ENDT 676 diesel engine with existing but nonoptimum ORCS hardware made available from an earlier automotive Rankine-cycle program. The results of these feasibility demonstration tests, both steady-state and transient, over the operating range of the diesel engine, are presented.

Not Available

1976-01-01T23:59:59.000Z

183

Friction surfaced Stellite6 coatings  

SciTech Connect

Solid state Stellite6 coatings were deposited on steel substrate by friction surfacing and compared with Stellite6 cast rod and coatings deposited by gas tungsten arc and plasma transferred arc welding processes. Friction surfaced coatings exhibited finer and uniformly distributed carbides and were characterized by the absence of solidification structure and compositional homogeneity compared to cast rod, gas tungsten arc and plasma transferred coatings. Friction surfaced coating showed relatively higher hardness. X-ray diffraction of samples showed only face centered cubic Co peaks while cold worked coating showed hexagonally close packed Co also. - Highlights: Black-Right-Pointing-Pointer Stellite6 used as coating material for friction surfacing. Black-Right-Pointing-Pointer Friction surfaced (FS) coatings compared with casting, GTA and PTA processes. Black-Right-Pointing-Pointer Finer and uniformly distributed carbides in friction surfaced coatings. Black-Right-Pointing-Pointer Absence of melting results compositional homogeneity in FS Stellite6 coatings.

Rao, K. Prasad; Damodaram, R. [Department of Metallurgical and Materials Engineering - Indian Institute of Technology Madras, Chennai 600 036 (India); Rafi, H. Khalid, E-mail: khalidrafi@gmail.com [Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036 (India); Ram, G.D. Janaki [Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036 (India); Reddy, G. Madhusudhan [Metal Joining Group, Defence Metallurgical Research Laboratory (DMRL) Kanchanbagh, Hyderabad 500 058 (India); Nagalakshmi, R. [Welding Research Institute, Bharat Heavy Electricals Limited, Tiruchirappalli 620 014 (India)

2012-08-15T23:59:59.000Z

184

Friction Stir Welding and Processing  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... Material flow is a key phenomenon to obtain sound joints by friction stir welding ( FSW). In this study, the material flow during FSW was ...

185

On the wall jet from the ring crevice of an internal combustion engine  

DOE Green Energy (OSTI)

Numerical simulations and experiments of the jetting of gases from the ring crevices of a laboratory engine shortly after exhaust valve opening showed an unanticipated radial flow of the crevice gases into the main combustion chamber. We report well-resolved numerical simulations of a wall jet that show that this radial motion is driven by vorticity generation in the wall boundary layer and at the corner of the piston crown.

Cloutman, L.D. [Lawrence Livermore National Lab., CA (United States); Green, R.M. [Sandia National Labs., Livermore, CA (United States)

1996-05-01T23:59:59.000Z

186

The railplug: Development of a new ignitor for internal combustion engines  

DOE Green Energy (OSTI)

The goal of the railplug project is to commercialize this miniaturized railgun as an engine technology as rapidly as possible. To improve the technology transfer process, a board of industrial advisors was established. A list of representatives is included at the end of this annual report. The Railplug External Advisory Board (REAB) met in Austin on March 17--18, 1991 to discuss the project plan. A list of comments from the REAB is included at the end of this progress report, along with our written response to those comments. An alternate first'' meeting with some representatives of the REAB was held on July 9, 1991. This meeting was attended by most of the board members who were unable to attend the first meeting. The second meeting of the REAB was held in Toronto, Canada, on October 10, 1991. A list of the board members comments from this meeting is included at the end of this report, along with our written response to those comments. These meetings have proven to be most useful in assuring that this project is conducted as efficiently as possible. The railplug project is essentially divided into three main tasks: (1) Railplug system development; (2) application of railplugs to engines; and (3) railplug durability. The status of each of these tasks is described below.

Matthew, R.D.; Nichols, S.P.; Weldon, W.F.

1991-10-01T23:59:59.000Z

187

friction stir welding iv table of contents  

Science Conference Proceedings (OSTI)

Friction Stir Welding—After a Decade of Development [pp. 3-18] William Arbegast . Friction Stir Welding of an Aluminum Coal Hopper Railcar [pp. 19-28

188

Friction Stir Welding and Processing VI  

Science Conference Proceedings (OSTI)

Aug 2, 2010 ... Friction Stir Welding and Processing of Advanced Materials for Coal and Nuclear Power Applications · Friction Stir Welding of 25 mm Thick Al ...

189

Method and device for diagnosing and controlling combustion instabilities in internal combustion engines operating in or transitioning to homogeneous charge combustion ignition mode  

DOE Patents (OSTI)

This invention is a method of achieving stable, optimal mixtures of HCCI and SI in practical gasoline internal combustion engines comprising the steps of: characterizing the combustion process based on combustion process measurements, determining the ratio of conventional and HCCI combustion, determining the trajectory (sequence) of states for consecutive combustion processes, and determining subsequent combustion process modifications using said information to steer the engine combustion toward desired behavior.

Wagner, Robert M [Knoxville, TN; Daw, Charles S [Knoxville, TN; Green, Johney B [Knoxville, TN; Edwards, Kevin D [Knoxville, TN

2008-10-07T23:59:59.000Z

190

Reaction Engineering International and Pacific Northwest Laboratory staff exchange: Addressing computational fluid dynamics needs of the chemical process industry  

SciTech Connect

Staff exchanges, such as the one described in this report, are intended to facilitate communications and collaboration among scientists and engineers at Department of Energy (DOE) laboratories, in US industry, and academia. Funding support for these exchanges is provided by the DOE, Office of Energy Research, Laboratory Technology Transfer Program. Funding levels for each exchange typically range from $20,000 to $40,000. The exchanges offer the opportunity for the laboratories to transfer technology and expertise to industry, gain a perspective to industry`s problems, and develop the basis for further cooperative efforts through Cooperative Research and Development Agreements (CRADAS) or other mechanisms. Information in this report on the staff exchange of the Pacific Northwest Laboratory (PNL) staff with Reaction Engineering International (REI) includes the significant accomplishments, significant problems, industry benefits realized, recommended follow-on work and potential benefit of that work. The objectives of this project were as follows: Work with REI to develop an understanding of the computational fluid dynamics (CFD) needs of the chemical process industry; assess the combined capabilities of the PNL and REI software analysis tools to address these needs; and establish a strategy for a future programmatically funded, joint effort to develop a new CFD tool for the chemical process industry.

Fort, J.A.

1995-07-01T23:59:59.000Z

191

The effects of spark ignition parameters on the lean burn limit of natural gas combustion in an internal combustion engine  

E-Print Network (OSTI)

A full factorial experiment was conducted to determine the effects of internal combustion engine ignition parameters on the air-fuel ratio (A/F) lean limit of combustion with compressed natural gas (CNG). Spark electrical characteristics (voltage, current, power, energy and duration), electrode design, electrode gap and compression ratio were the control variables and A/F lean limit, fuel consumption and hydrocarbon and oxides of nitrogen emission concentrations were the response variables. Experiments were performed on a General Motors' 2.2 liter four cylinder engine. Spark electrical characteristics were varied by applying various primary voltages and secondary resistances to the production inductive ignition system, with the engine operating at two operating conditions, a light load and a road load, and with two compression ratios. Cylinder pressure data was acquired to quantify load and combustion stability. Spark electrical characteristics were acquired with a digital oscilloscope to quantify secondary spark electrical characteristics. The results indicated that the response variables were generally insensitive to all the control variables, except for compression ratio. However, contrary to the literature, the A/F lean limit and fuel efficiency degraded with a higher compression ratio. Single and multi-variant linear regressions were studied between the A/F lean limit and the spark electrical characteristics. The only statistically significant and notable finding was a multi-variant linear regression of the A/F lean limit to increasing spark duration and decreasing spark energy at the road load operating condition. Statistical significance of the effect of the ignition system control variables on the response variables was higher at the road load than the light load operating condition. Emissions responded as expected with the higher compression ratio.

Chlubiski, Vincent Daniel

1997-01-01T23:59:59.000Z

192

Evaluation of Sialon internal combustion engine components and fabrication of several ceramic components for automotive applications  

DOE Green Energy (OSTI)

Fabrication development work was carried out on a push-rod tip having a stepped OD design and a 90[degree] shoulder in the transition area. Spray-dried Sialon premix was used in dry press tooling, and components were densified to about 98% of theoretical density using pressureless sintering conditions. Upon evaluation of the sintered components, it was found that afl components showed defects in the transition area. Modifications of the pressing parameters, incorporation of a 45[degree] angle in the shoulder area, and the use of tailored premix did not lead to the fabrication of defect-free parts. From these observations, it was concluded that the original part design could not easily be adapted to high-volume ceramic manufacturing methods. Subsequently, a modification to the desip was implemented. An SiC material with improved toughness (Hexoloy SX) was used for fabricating several test components with a closely machined, straight OD design. Pressureless-sintered and post-hot isostatically pressed (HIPed) Hexoloy SX components were supplied to The American Ceramic Engine Company (ACE) for assembly and testing. Fuel pump push-rod assemblies with Hemoloy SX tips were prepared by ACE, but no testing has been carried out to date.

McMurtry, C.H.; Ten Eyck, M.O.

1992-10-01T23:59:59.000Z

193

Evaluation of Sialon internal combustion engine components and fabrication of several ceramic components for automotive applications  

DOE Green Energy (OSTI)

Fabrication development work was carried out on a push-rod tip having a stepped OD design and a 90{degree} shoulder in the transition area. Spray-dried Sialon premix was used in dry press tooling, and components were densified to about 98% of theoretical density using pressureless sintering conditions. Upon evaluation of the sintered components, it was found that afl components showed defects in the transition area. Modifications of the pressing parameters, incorporation of a 45{degree} angle in the shoulder area, and the use of tailored premix did not lead to the fabrication of defect-free parts. From these observations, it was concluded that the original part design could not easily be adapted to high-volume ceramic manufacturing methods. Subsequently, a modification to the desip was implemented. An SiC material with improved toughness (Hexoloy SX) was used for fabricating several test components with a closely machined, straight OD design. Pressureless-sintered and post-hot isostatically pressed (HIPed) Hexoloy SX components were supplied to The American Ceramic Engine Company (ACE) for assembly and testing. Fuel pump push-rod assemblies with Hemoloy SX tips were prepared by ACE, but no testing has been carried out to date.

McMurtry, C.H.; Ten Eyck, M.O.

1992-10-01T23:59:59.000Z

194

Investigation of spark discharge processes and ignition systems for spark-ignited internal combustion engines  

E-Print Network (OSTI)

Spark ignition of the air-fuel mixture at the appropriate time is important for successful flame initiation and complete combustion thereafter without unnecessary emissions. The physical and chemical reactions taking place between the spark plug electrodes during spark delivery determine the intensity of the spark and subsequent flame initiation. The energy of spark and the duration of its delivery are dependent on the ignition system design. The characteristics of the spark plug determine the interaction of the spark with the air-fuel mixture. The compression pressure, combustion chamber temperature and mixture motion at the time of spark generation play a significant role in the flame initiation process. All of these parameters are responsible for the resulting spark discharge and flame initiation process. The objectives of this research include investigation of the different phases of spark discharge and development of a thermodynamic analysis to determine the rate of change of the spark kernel temperature with time during the initial phases of the spark discharge. The effect of spark energy delivery rate, heat transfer losses and mass entrainment on the spark kernel temperature was determined through the thermodynamic analysis. This research also includes an evaluation of the various types of conventional as well as high-energy ignition systems for lean burn engines. An experimental ignition system was constructed to determine the effect of ignition energy, spark plug electrode geometry and gas pressure on the characteristics of the spark discharge. Images of spark discharge were captured through photography using three different types of electrode geometries and also by varying the pressure and by changing the ignition energy using different condensers in the ignition system. Finally, the results of the thermodynamic analysis were compared with the results from the experiment.

Khare, Yogesh Jayant

2000-01-01T23:59:59.000Z

195

Friction microprobe investigation of particle layer effects on sliding friction  

DOE Green Energy (OSTI)

Interfacial particles (third-bodies), resulting from wear or external contamination, can alter and even dominate the frictional behavior of solid-solid sliding in the absence of effective particle removal processes (e.g., lubricant flow). A unique friction microprobe, developed at Oak Ridge National Laboratory, was used to conduct fine- scale friction studies using 1.0 mm diameter stainless steel spheres sliding on several sizes of loose layers of fine aluminum oxide powders on both aluminum and alumina surfaces. Conventional, pin-on-disk experiments were conducted to compare behavior with the friction microprobe results. The behavior of the relatively thick particle layers was found to be independent of the nature of underlying substrate, substantiating previous work by other investigators. The time-dependent behavior of friction, for a spherical macrocontact starting from rest, could generally be represented by a series of five rather distinct phases involving static compression, slider breakaway, transition to steady state, and dynamic layer instability. A friction model for the steady state condition, which incorporates lamellar powder layer behavior, is described.

Blau, P.J.

1993-01-01T23:59:59.000Z

196

INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'07 28 -31 AUGUST 2007, CITE DES SCIENCES ET DE L'INDUSTRIE, PARIS, FRANCE  

E-Print Network (OSTI)

and the solution evolve parallel. Then, we explain that the complexity of the medical devices needs specificINTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'07 28 - 31 AUGUST 2007, CITE DES SCIENCES ET, there is such a difficulty of medical terms routinely employed by the surgeon to explain his need, which causes to reduction

Paris-Sud XI, Université de

197

Hydrocarbon-fueled internal combustion engines: "the worst form of vehicle propulsion... except for all the other forms"  

E-Print Network (OSTI)

, funded by the Defense Advanced Research Projects Agency (DARPA); a new and improved Stirling engine

198

Shockwave Engine: Wave Disk Engine  

Science Conference Proceedings (OSTI)

Broad Funding Opportunity Announcement Project: MSU is developing a new engine for use in hybrid automobiles that could significantly reduce fuel waste and improve engine efficiency. In a traditional internal combustion engine, air and fuel are ignited, creating high-temperature and high-pressure gases which expand rapidly. This expansion of gases forces the engine’s pistons to pump and powers the car. MSU’s engine has no pistons. It uses the combustion of air and fuel to build up pressure within the engine, generating a shockwave that blasts hot gas exhaust into the blades of the engine’s rotors causing them to turn, which generates electricity. MSU’s redesigned engine would be the size of a cooking pot and contain fewer moving parts—reducing the weight of the engine by 30%. It would also enable a vehicle that could use 60% of its fuel for propulsion.

None

2010-01-14T23:59:59.000Z

199

Investigation of a rotary valving system with variable valve timing for internal combustion engines: Final technical report  

DOE Green Energy (OSTI)

The objective of the program was to provide a functional demonstration of the Hansen Rotary Valving System with Variable Valve timing (HRVS/VVT), capable of throttleless inlet charge control, as an alternative to conventional poppet-valves for use in spark ignited internal combustion engines. The goal of this new technology is to secure benefits in fuel economy, broadened torque band, vibration reduction, and overhaul accessibility. Additionally, use of the variable valve timing capability to vary the effective compression ratio is expected to improve multi-fuel tolerance and efficiency. Efforts directed at the design of HRVS components proved to be far more extensive than had been anticipated, ultimately requiring that proof-trial design/development work be performed. Although both time and funds were exhausted before optical or ion-probe types of in-cylinder investigation could be undertaken, a great deal of laboratory data was acquired during the course of the design/development work. This laboratory data is the basis for the information presented in this Final Report.

Cross, P.C.; Hansen, C.N.

1994-11-18T23:59:59.000Z

200

Method and apparatus utilizing valve throttling and charge stratification in the operation of an internal combustion engine  

Science Conference Proceedings (OSTI)

In an internal combustion engine this patent describes means forming a combustion chamber, a spark plug in the chamber, a piston disposed in the chamber for reciprocable movement toward and away from the spark plug, a valve member, circular seat means for the valve member, means for varying the lift of the valve member, a generally cylindrical shroud corresponding generally to the size of the seat means. The cylindrical shroud is relieved only in the direction of the spark plug so that, when the valve member is moved relative to the shroud by the lift-varying means, a stratified mixture of air and fuel is directed toward the spark plug until the lift-varying means causes the valve member to pass beyond the shroud so that during the initial lift of the valve member the stratified air and fuel mixture is directed solely toward the spark plug until the valve member passes beyond the shroud and the air and fuel mixture is directed generally through a 360/sup 0/ arc after the valve member passes beyond the shroud, and means limiting the lift of the valve member so that it does not pass the shroud during lighter loads, whereby the air and fuel mixture is directed primarily toward the spark plug until the valve member passes beyond the shroud.

Burandt, C.O.

1988-02-16T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Modeling of liner finish effects on oil control ring lubrication in internal combustion engines based on deterministic method  

E-Print Network (OSTI)

Twin-land oil control ring is widely used in the automotive diesel engines, and is gaining more and more applications in the modern designs of gasoline engines. Its interaction with the cylinder liner surface accounts for ...

Chen, Haijie

2008-01-01T23:59:59.000Z

202

INTERNATIONAL UNION OF OPERATING ENGINEERS NATIONAL HAZMAT PROGRAM - ADAMANT CIRCULAR SAW OENHP{number_sign}: 2001-05, VERSION A  

Science Conference Proceedings (OSTI)

Florida International University's (FIU) Hemispheric Center for Environmental Technology (HCET) evaluated five saws for their effectiveness in cutting up specially prepared fiberglass-reinforced plywood crates. These crates were built as surrogates for crates that presently hold radioactive contaminated glove boxes at the Department of Energy's (DOE) Los Alamos facility. The Adamant circular saw was assessed on August 14, 2001. During the FIU test of efficacy, a team from the Operating Engineers National Hazmat Program (OENHP) evaluated the occupational safety and health issues associated with this technology. The Adamant was only used during a limited ''test'' on a regular plywood crate due to safety considerations of the tool for this application. The Adamant circular saw, a counter-rotating twin-cutter, constructed with blades that work differently than conventional cutting wheels with twin blades, each rotating in opposite directions. It is used to cut wood and metals. Each blade is approximately 8 3/4 inches in diameter with a maximum cutting depth of 2 1/2 inches. The machine has two rotation speeds: 1,900 and 2,900 rotations per minute (rpm). The saw is operated with an interlocked, guarded trigger switch located at the end of the saw opposite the cutting blades. To operate the saw, the safety interlock must be depressed prior to powering the saw with the trigger control. The saw is supported by a handle at the front of the saw near the cutting blades. The top part of the blades is guarded near the handle, with approximately three-fourths of the face of the blades exposed. The Adamant circular saw is an innovative technology used to cut metals and wood. Its safety features include: interlocking switch for powering the saw, overload indicator and shutoff, and an electronic brake that stops the engine immediately when the start button is released. The top part of the blades is guarded near the motor. With approximately three-fourths of the face of the blades open, the operator is exposed to the potential risk of serious and minor cuts and abrasions when using and handling the saw. There is also potential for damage to the blades if the saw is not stored properly. Without guarding on the lower part of the blades, these can be damaged if the saw is dropped or rested on the cutting blades. Based upon the industrial hygiene sampling conducted for the other four saws demonstrated at FIU, noise levels, nuisance dust, and airborne fiberglass may be a problem when using this technology for the cutting of fiberglass-reinforced plywood crates. No industrial hygiene sampling was conducted while the Adamant saw was in use. Engineering controls should be used to eliminate these problems whenever possible. Where this is not possible, administrative controls, training, and proper personal protective equipment (PPE) should be used. Respirators should be used if engineering controls do not sufficiently control the dust or fiberglass generated. Respirators should be equipped with an organic vapor and acid gas cartridge with High Efficiency Particulate Air (HEPA) filter, since during the demonstration, the workers complained of an odd smell, which may have been the breakdown of the fiberglass.

Unknown

2002-01-01T23:59:59.000Z

203

Fluctuating-friction molecular motors  

E-Print Network (OSTI)

Abstract. We show that the correlated stochastic fluctuation of the friction coefficient can give rise to long-range directional motion of a particle undergoing Brownian random walk in a constant periodic energy potential landscape. The occurrence of this motion requires the presence of two additional independent bodies interacting with the particle via friction and via the energy potential, respectively, which can move relative to each other. Such three-body system generalizes the classical Brownian ratchet mechanism, which requires only two interacting bodies. In particular, we describe a simple two-level model of fluctuating-friction molecular motor that can be solved analytically. In our previous work [M.K., L.M and D.P. 2000 J. Nonlinear Opt. Phys. Mater. 9 157] this model has been first applied to understanding the fundamental mechanism of the photoinduced reorientation of dye-doped liquid crystals. Applications of the same idea to other fields such as molecular biology and nanotechnology can however be envisioned. As an example, in this paper we work out a model of the actomyosin system based on the fluctuating-friction mechanism. PACS numbers: 05.40.+j, 42.70.Df, 87.10.+eFluctuating-friction molecular motors 2 1.

unknown authors

2001-01-01T23:59:59.000Z

204

Engines - Spark Ignition Engines - Hydrogen Engines  

NLE Websites -- All DOE Office Websites (Extended Search)

large-scale hydrogen infrastructure by using the well-known and widely used internal combustion engine as the device that transforms the energy stored in hydrogen into motion. The...

205

INTERNATIONAL UNION OF OPERATING ENGINEERS NATIONAL HAZMAT PROGRAM - DEWALT RECIPROCATING SAW OENHP{number_sign}: 2001-01, VERSION A  

Science Conference Proceedings (OSTI)

Florida International University's (FIU) Hemispheric Center for Environmental Technology (HCET) evaluated five saws for their effectiveness in cutting specially prepared fiberglass-reinforced plywood crates. These crates were built as surrogates for crates that presently hold radioactively contaminated glove boxes at the Department of Energy's (DOE) Los Alamos facility. The DeWalt reciprocating saw was assessed on August 13, 2001. During the FIU test of efficacy, a team from the Operating Engineers National Hazmat Program (OENHP) evaluated the occupational safety and health issues associated with this technology. The DeWalt reciprocating saw is a hand-held industrial tool used for cutting numerous materials, including wood and various types of metals depending upon the chosen blade. Its design allows for cutting close to floors, corners, and other difficult areas. An adjustable shoe sets the cut at three separate depths. During the demonstration for the dismantling of the fiberglass-reinforced plywood crate, the saw was used for extended continuous cutting, over a period of approximately two hours. The dismantling operation involved vertical and horizontal cuts, saw blade changes, and material handling. During this process, operators experienced vibration to the hand and arm in addition to a temperature rise on the handgrip. The blade of the saw is partially exposed during handling and fully exposed during blade changes. Administrative controls, such as duty time of the operators and the machine, operator training, and personal protective equipment (PPE), such as gloves, should be considered when using the saw in this application. Personal noise sampling indicated that both workers were exposed to noise levels exceeding the Occupational Safety and Health Administration's (OSHA) Action Level of 85 decibels (dBA) with time-weighted averages (TWA's) of 88.3 and 90.6 dBA. Normally, a worker would be placed in a hearing conservation program if his TWA was greater than the Action Level. In this case, however, monitoring was conducted during a simulation, not during the actual work conducted at the worksite. Additional sampling should be conducted at the worksite to determine the actual noise levels for the workers. Until it is determined that the actual TWA's are less than the Action Level, the workers should use PPE. A training program on the proper use and wearing of the selected PPE should be provided to each worker. Nuisance dust monitoring yielded a concentration of 10.69 milligrams per cubic meter (mg/m{sup 3}). Although this is less than the OSHA Permissible Exposure Limit (PEL) of 15 mg/m{sup 3}, it is above the American Conference of Governmental Industrial Hygienists' (ACGIH) Threshold Limit Value (TLV) of 10 mg/m{sup 3}. Fiberglass dust monitoring yielded a fiber count of 1.7 fibers per cubic centimeter (f/cc). This is above the PEL and the TLV of 1.0 f/cc. Therefore, controls should be implemented (engineering or PPE) to reduce the workers' exposure to the dust. Respirators should be used if engineering controls do not sufficiently control the dust or fiberglass generated. Respirators should be equipped with an organic vapor and acid gas cartridge with a High Efficiency Particulate Air (HEPA) filter, since during the demonstration, the workers complained of an odd smell, which may have been from the breakdown of the fiberglass.

Unknown

2002-01-31T23:59:59.000Z

206

Seismic Interstory Drift Demands in Steel Friction Damped Braced Buildings  

E-Print Network (OSTI)

In the last 35 years, several researchers have proposed, developed and tested different friction devices for seismic control of structures. Their research has demonstrated that such devices are simple, economical, practical, durable and very effective. However, research on passive friction dampers, except for few instances, has not been given appropriate attention lately. This has caused some of the results of old studies to become out-of-date, lose their validity in the context of today's design philosophies or to fall short on the expectations of this century's structural engineering. An analytical study on the behavior of friction devices and the effect they have on the structures into which they are incorporated has been undertaken to address the new design trends, codes, evaluation criteria and needs of today's society. The present study consists of around 7,000 structural analyses that are used to show the excellent seismic performance and economic advantages of Friction Damped Braced Frames. It serves, at the same time, to improve our understanding on their dynamic behavior. Finally, this thesis also sets the basis for future research on the application of this type of seismic energy dissipating systems.

Peternell Altamira, Luis E.

2009-05-01T23:59:59.000Z

207

Friction Stir Welding and Processing VII  

Science Conference Proceedings (OSTI)

Sponsorship, TMS Materials Processing and Manufacturing Division .... Processing and Characterization of Cu-Mo Composite Via Additive Friction Stir ...

208

Available Technologies: Electronic Control of Friction on ...  

... motor vehicles, and tools. Existing methods of friction control involve permanently modifying surfaces by adding lubricant layers and hard ...

209

Fluctuating-friction molecular motors  

E-Print Network (OSTI)

We show that the correlated stochastic fluctuation of the friction coefficient can give rise to long-range directional motion of a particle undergoing Brownian random walk in a constant periodic energy potential landscape. The occurrence of this motion requires the presence of two additional independent bodies interacting with the particle via friction and via the energy potential, respectively, which can move relative to each other. Such three-body system generalizes the classical Brownian ratchet mechanism, which requires only two interacting bodies. In particular, we describe a simple two-level model of fluctuating-friction molecular motor that can be solved analytically. In our previous work [M.K., L.M and D.P. 2000 J. Nonlinear Opt. Phys. Mater. vol. 9, 157] this model has been first applied to understanding the fundamental mechanism of the photoinduced reorientation of dye-doped liquid crystals. Applications of the same idea to other fields such as molecular biology and nanotechnology can however be envisioned. As an example, in this paper we work out a model of the actomyosin system based on the fluctuating-friction mechanism.

Lorenzo Marrucci; Domenico Paparo; Markus Kreuzer

2001-10-12T23:59:59.000Z

210

E-Alerts: Combustion, engines, and propellants (reciprocation and rotating combustion engines). E-mail newsletter  

Science Conference Proceedings (OSTI)

Design, performance, and testing of reciprocating and rotating engines of various configurations for all types of propulsion. Includes internal and external combustion engines; engine exhaust systems; engine air systems components; engine structures; stirling and diesel engines.

NONE

1999-04-01T23:59:59.000Z

211

Stirling engine with pressurized crankcase  

DOE Patents (OSTI)

A two piston Stirling engine wherein the pistons are coupled to a common crankshaft via bearing means, the pistons include pad means to minimize friction between the pistons and the cylinders during reciprocation of the pistons, means for pressurizing the engine crankcase, and means for cooling the crankshaft and the bearing means eliminating the need for oil in the crankcase.

Corey, John A. (Melrose, NY)

1988-01-01T23:59:59.000Z

212

1 Copyright 2011 by ASME Proceedings of the ASME 2011 Internal Combustion Engine Division Fall Technical Conference  

E-Print Network (OSTI)

(NEA) has shown great potential in NOx reduction without the drawbacks of exhaust gas recirculation (EGR). Use of NEA in stationary natural gas engines has shown up to 70% NOx reduction with a modest 2 promising results in NOx reduction in stationary natural gas engines [2]. Modeling and simulation can play

213

International Degree (ID) and Engineering For complete information and admission requirements for the ID, refer to the "Passport to the International  

E-Print Network (OSTI)

credits which apply toward the degree. The ID program advisor works closely with each student to help develop a unique program that meets their needs and future goals. Students will also work with a thesis a structural engineer on the Hanford vitrification design-build project How can I get started

Escher, Christine

214

Usage of Friction-damped Braced Frames for Seismic Vibration Control  

E-Print Network (OSTI)

This study presents the results of experimental work that examines the functionality of friction-damped braced frames during seismic events. The simplicity and efficacy of this friction device as a means of passive vibration control suggest that it may have notable implications in the field of structural engineering. Little scholarship has been devoted to this issue in recent years, and further research to advance our understanding of its possible implementations is necessary. To measure the functionality of this type of frame, this study first examines and compares virtual models of a building modeling the effect of friction damping versus that same building without such damping. It then corroborates these findings by presenting the results of physical experimentation on a scale model of the building, both with and without damping. The validation of the virtual models by the physical model provides credence to the usage of friction-damped braced frames as a seismic energy dissipating system.

Fink, Brynnan 1992-

2012-05-01T23:59:59.000Z

215

Summary and Evaluation of NRC-Sponsored Stellite 6 Aging and Friction Tests  

SciTech Connect

This report describes four sets of tests sponsored by the U.S. Nuclear Regulatory Commission and conducted by the Idaho National Engineering and Environmental Laboratory. The tests support research addressing the need to provide assurance that motor-operated valves are able to perform their intended safety function, usually to open or close against specified (design basis) flow and pressure loads. One of the parameters that affects a gate valve's operability is the friction between the disc seats and the valve body seats. In most gate valves, these surfaces are hardfaced with Stellite 6, a cobalt-based alloy. The tests described in this report investigate the changes that occur in the friction as the Stellite 6 surfaces develop an oxide film as they age. Stellite 6 specimens were aged in a corrosion autoclave, the oxide films were examined and characterized, and the specimens were subjected to friction testing in a friction autoclave. A very thin oxide film formed after only a fe w days of natural aging. Even a very thin oxide film caused an increase in friction. The surface structure of the oxide film was dominated by a hard crystalline structure, such that the friction response was analogous to rubbing two pieces of sandpaper together. In the limited data provided by naturally aged specimens (78 days maximum exposure, very thin oxide films), the friction increased with greater aging time, approaching an as-yet-undetermined plateau. Although the thickness of the oxide film increased with greater aging time, the mechanical properties of the oxide film (larger granules with greater aging time) appeared to play a greater role in the friction response. Friction testing of specimens subjected to simulated in-service testing strokes at intervals during the aging process showed only a slight decrease in friction, compared to other specimens. Results from specimens subjected to accelerated aging were inconclusive, because of differences in the structure and comp osition of the oxide films, compared to naturally aged specimens. For the naturally aged specimens, the highest friction occurred on the first stroke. The first stroke smeared the oxide film and dislodged some of the granules, so that subsequent strokes saw lower friction values and less variation in the friction. This result underscores the importance of planning in-plant tests so that data are collected from the first stroke following a period of inactivity.

J. C. Watkins; K. G. DeWall; D. Bramwell

1999-04-01T23:59:59.000Z

216

Advanced Vehicle Testing Activity: Other Internal Combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

Other Internal Combustion Engine Vehicles to someone by E-mail Share Advanced Vehicle Testing Activity: Other Internal Combustion Engine Vehicles on Facebook Tweet about Advanced...

217

INTERNATIONAL UNION OF OPERATING ENGINEERS NATIONAL HAZMAT PROGRAM - PORTER-CABLE CIRCULAR SAW OENHP: 2001-04, VERSION A  

DOE Green Energy (OSTI)

Florida International University's (FIU) Hemispheric Center for Environmental Technology (HCET) evaluated five saws for their effectiveness in cutting specially prepared fiberglass-reinforced plywood crates. These crates were built as surrogates for crates that presently hold radioactively contaminated glove boxes at the Department of Energy's (DOE) Los Alamos facility. The Porter-Cable circular saw was assessed on August 15-16, 2001 (Porter-Cable No.1 and Porter-Cable No.2, respectively). During the FIU test of efficacy, a team from the Operating Engineers National Hazmat Program (OENHP) evaluated the occupational safety and health issues associated with this technology. The Porter-Cable saw is a straightforward machine for cutting wood of varying thickness. The blade is fully guarded with a fixed upper and a lower retractable guard. The lower guard retracts as the blade engages the work piece. The unit is operated with an on/off guarded trigger switch and is supported with a handgrip mounted near the front of the saw. The saw is equipped with a directional nozzle, which aims sawdust away from the operator and the line of cut. An optional vacuum system, attached to the directional nozzle, is used to remove and collect dust. During the demonstration of Porter-Cable No.1, personal noise sampling indicated that one worker was under and one was at the Occupational Safety and Health Administration's (OSHA) Action Level of 85 decibels (dBA) with time-weighted averages (TWA's) of 82.7 and 84.6 dBA, respectively. During the demonstration of Porter-Cable No.2, however, both workers did exceed the Action Level with TWA's of 89.7 and 90.0 dBA. These data are not entirely representative as they were gathered during a simulation and not at the actual worksite. Additional sampling should be conducted on-site, but the workers should wear hearing protection until it is determined that it is no longer necessary. The total nuisance dust sample for Porter-Cable No.1 was 3.53 milligrams per cubic meter (mg/m{sup 3}), which is lower than the OSHA Permissible Exposure Limit (PEL) of 15 mg/m{sup 3} and the American Conference of Governmental Industrial Hygienists' (ACGIH) Threshold Limit Value (TLV) of 10 mg/m{sup 3}. Porter-Cable No.2's nuisance dust results yielded a value of 22.05 mg/m{sup 3}, which is over the PEL and TLV. The fiber analysis for the first demonstration yielded 12.9 fibers per cubic centimeter (f/cc), which is much higher than the PEL of 1 f/cc. Galson Laboratories considered the fiber analysis for the second demonstration void due to the overloading of dust on the filter. Kickback, the sudden reaction to a pinched blade, is possible with this saw and could cause the saw to lift up and out of the work piece and toward the operator. Proper work position and firm control of the saw minimizes the potential for a sprain or strain. Care needs to be exercised to support the work piece properly and to not force the tool.

Unknown

2002-01-15T23:59:59.000Z

218

Economics of electron beam and electrical discharge processing for post-combustion NO{sub x} control in internal combustion engines  

DOE Green Energy (OSTI)

This paper discusses the physics and chemistry of non-thermal plasma processing for post-combustion NO{sub x} control in internal combustion engines. A comparison of electron beam and electrical discharge processing is made regarding their power consumption, radical production, NO{sub x} removal mechanisms, and by-product formation. Pollution control applications present a good opportunity for transferring pulsed power techniques to the commercial sector. However, unless advances are made to drastically reduce the price and power consumption of electron beam sources and pulsed power systems, these plasma techniques will not become commercially competitive with conventional thermal or surface-catalytic methods.

Penetrante, B.M.

1993-08-02T23:59:59.000Z

219

Adaptive friction compensation for permanent magnet linear synchronous motor  

Science Conference Proceedings (OSTI)

The paper discussed an adaptive friction compensation scheme based on Coulomb friction and a parameter identifier. The model reference adaptive system based on Coulomb friction was designed to compensate the friction on-line. The designed model reference ... Keywords: friction compensation, model reference adaptive control, parameter identification, permanent magnet linear synchronous motor (PMLSM)

Wang Li-Mei; Wu Lin

2009-06-01T23:59:59.000Z

220

Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone  

Science Conference Proceedings (OSTI)

A tropical cyclone (TC) viewed as a heat engine converts heat energy extracted from the ocean into the kinetic energy of the TC, which is eventually dissipated due to surface friction. Since the energy production rate is a linear function while ...

Yuqing Wang; Jing Xu

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Friction and Galling Performance of NOREM 02 and NOREM 02A Alloys  

Science Conference Proceedings (OSTI)

To reduce plant radiation levels, EPRI has developed a series of iron-based hardfacing alloys known as NOREM. This report documents tests conducted to evaluate the friction and galling thresholds for NOREM 02 and 02A alloys to provide a basis for engineering evaluation of thrust requirements for gate valves in which these alloys are utilized.

1999-12-07T23:59:59.000Z

222

Friction Stir Welding: High Temperature Materials I  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Friction Stir Welding of Pipeline Steels: Murray Mahoney1; Samuel .... Over 135 feet of weld length was achieved with a single W-based tool ...

223

Friction Stir Welding: High Temperature Materials II  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Enhanced Friction Stir Welding of Titanium Using Elemental Foils: Richard Fonda 1; Keith Knipling1; 1Naval Research Laboratory

224

Across Inertia Friction Welded Alloy 720Li  

Science Conference Proceedings (OSTI)

kinetic energy stored in the rotating flywheel is dissipated as heat through friction/ shearing at the weld interface. In this way, it is possible to join advanced ...

225

Proceedings, International Conference on Civil and Environmental Engineering (ICCEE-2004), Hiroshima University,Japan, July 27 to 28, 2004  

E-Print Network (OSTI)

), Hiroshima University,Japan, July 27 to 28, 2004 1 MODELING THE EFFECT OF RISING SEA LEVEL ON RIVER DELTAS and Environmental Engineering (ICCEE-2004), Hiroshima University,Japan, July 27 to 28, 2004 2 The passive margin-2004), Hiroshima University,Japan, July 27 to 28, 2004 3 Most of the rivers of Fig. 1 flow from

Parker, Gary

226

Stabilizing stick-slip friction  

E-Print Network (OSTI)

Even the most regular stick-slip frictional sliding is always stochastic, with irregularity in both the intervals between slip events and the sizes of the associated stress drops. Applying small-amplitude oscillations to the shear force, we show, experimentally and theoretically, that the stick-slip periods synchronize. We further show that this phase-locking is related to the inhibition of slow rupture modes which forces a transition to fast rupture, providing a possible mechanism for observed remote triggering of earthquakes. Such manipulation of collective modes may be generally relevant to extended nonlinear systems driven near to criticality.

Rosario Capozza; Shmuel M. Rubinstein; Itay Barel; Michael Urbakh; Jay Fineberg

2011-04-11T23:59:59.000Z

227

Stellite 6 Friction Changes Due to Aging and In-Service Testing  

SciTech Connect

For the past several years, researchers at the Idaho National Engineering and Environmental Laboratory, under the sponsorship of the U.S. Nuclear Regulatory Commission, have been investigating the ability of motor-operated valves to close or open when subjected to design basis flow and pressure loads. Part of this research addresses the friction that occurs at the interface between the valve disc and the valve body seats during operation of a gate valve. In most gate valves, these surfaces are hardfaced with Stellite 6, a cobalt-based alloy. The nuclear industry has developed methods to analytically predict the thrust needed to operate these valves at specific pressure conditions. To produce accurate valve thrust predictions; the analyst must have a reasonably accurate, though conservative, estimate of the coefficient of friction at the disc-to-seat interface. One of the questions that remains to be answered is whether, and to what extent, aging of the disc and seat surfaces affects the disc-to-seat coefficient of friction. Specifically, does the accumulation of a surface film due to aging of these surfaces increase the coefficient of friction and if so, how much? This paper presents results of specimen tests addressing this issue with emphasis on the following: • The change in the friction coefficient of Stellite 6 as it ages and whether the friction reaches a plateau. • The effect periodic gate valve cycling due to in-service testing has on the friction coefficient. • The results of an independent review of the test methods, processes, and the results of the research to date. • The status of ongoing aging and friction testing.

Watkins, John Clifford; DeWall, Kevin George

2001-07-01T23:59:59.000Z

228

International Conference on Engineering Education August 6 -- 10, 2001 Oslo, Norway CHALLENGES IN THE TEACHING OF ELECTRICAL POWER  

E-Print Network (OSTI)

Teaching and research in electrical power engineering has a long history and it is still the cornerstone of the modern society. Since the early days of electricity there has been major development especially in electronics and information technology. These changes have had and are having a dramatic impact on electrical power engineering. It is our feeling that the needs to check the curricula have not yet been realized in a sufficient level. We believe, that it is necessary to think the content of the basic courses appropriate for the modern needs and to attract more students. The paper discusses the background of the changes and describes some actions done at Helsinki University of Technology. One of these has for example been enhancing the natural link between teaching and research.

Engineering Motivation Of

2001-01-01T23:59:59.000Z

229

Copyright 2004, Society of Petroleum Engineers Inc. This paper was prepared for presentation at The Seventh SPE International Conference on  

E-Print Network (OSTI)

at The Seventh SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration.O. Box 833836, Richardson, TX 75083-3836, U.S.A., fax 01-972-952-9435. Abstract Oil and Gas Exploration. Introduction. Exploration for oil and gas has been expanding further into deepwater systems around the globe

Newcastle upon Tyne, University of

230

Friction Stir Welding and Processing III TABLE OF CONTENTS  

Science Conference Proceedings (OSTI)

Friction Stir Welding of Dissimilar Aluminum Alloys [pp. 35] R. Cook ... Fatigue of Pre-Corroded 2024-T3 Friction Stir Welds: Experiment and Prediction [pp. 43

231

Material Flow and Texture in Friction Extruded Wire  

Science Conference Proceedings (OSTI)

Presentation Title, Material Flow and Texture in Friction Extruded Wire ... conducted during friction extrusion of AA6061 wire with AA2195 as a marker insert.

232

Slippery When Stacked: NIST Theorists Quantify the Friction of ...  

Science Conference Proceedings (OSTI)

Slippery When Stacked: NIST Theorists Quantify the Friction of Graphene. ... Effect of elastic deformation on frictional properties of few-layer graphene. ...

2012-10-15T23:59:59.000Z

233

The railplug: Development of a new ignitor for internal combustion engines. Annual report, January 16, 1991--January 15, 1992  

DOE Green Energy (OSTI)

The goal of the railplug project is to commercialize this miniaturized railgun as an engine technology as rapidly as possible. To improve the technology transfer process, a board of industrial advisors was established. A list of representatives is included at the end of this annual report. The Railplug External Advisory Board (REAB) met in Austin on March 17--18, 1991 to discuss the project plan. A list of comments from the REAB is included at the end of this progress report, along with our written response to those comments. An alternate ``first`` meeting with some representatives of the REAB was held on July 9, 1991. This meeting was attended by most of the board members who were unable to attend the first meeting. The second meeting of the REAB was held in Toronto, Canada, on October 10, 1991. A list of the board members comments from this meeting is included at the end of this report, along with our written response to those comments. These meetings have proven to be most useful in assuring that this project is conducted as efficiently as possible. The railplug project is essentially divided into three main tasks: (1) Railplug system development; (2) application of railplugs to engines; and (3) railplug durability. The status of each of these tasks is described below.

Matthew, R.D.; Nichols, S.P.; Weldon, W.F.

1991-10-01T23:59:59.000Z

234

Fundamental studies of fuel chemistry as related to internal combustion engine phenomena. Final technical report, October 1987--December 1989  

DOE Green Energy (OSTI)

Intent of this research effort was to provide insight (through homogeneous gas phase kinetic studies at different constant pressures) to the fuel chemistry issues important to autoignition in engines. Conditions of the proposed experiments were chosen to be similar to engine parameters under knocking conditions: 700--1100 K temperatures, 1--20 atm pressures, and stoichiometries around 1. A variable pressure flow reactor was designed in which a range of reaction pressures and lower reaction temperatures could be accessed. Crossed beam optical access, continuous on-line gas sampling (nondispersive infrared, oxygen paramagnetic, H thermo-conductive, Fourier transform infrared, off-line GC, GC/mass spectrometric, wet chemical), and temperature measurements at the sampling location are available; reacting systems with reaction times ranging from 50--100 ms to 15--20 s can be studied. Testing has begun. Experiments on isobutene/oxygen mixtures have been conducted in the old atmospheric pressure flow reactor at 1150 K and in an equivalence ratio range of pyrolysis with 100 ppM oxygen background to 0.42. The kinetic model indicates that the inhibitory effect of isobutene at high temps is due to depletion of the active radical pool and formation of unreactive stable species and methyl radicals; isobutene oxidation/pyrolysis is heavily influenced by the chemistry of methyl radicals. The reaction of hydroperoxy radical (HO{sub 2}) with methyl radical and its effect on isobutene oxidation will be studied in the new reactor.

Dryer, F.L.; Brezinsky, K.

1990-09-01T23:59:59.000Z

235

FRICTION FACTOR IN HIGH PRESSURE NATURAL GAS PIPELINES FROM ROUGHNESS MEASUREMENTS  

E-Print Network (OSTI)

number. The reported studies have focused on flow over smooth surfaces. In industrial applications )sin( 2 2 =++ + dx Ud U D f g dx dP Equation 2 Most friction factor correlations used in industry with an internal diameter of 150 mm were made of honed steel tubing to ensure high quality tolerance of the inner

Gudmundsson, Jon Steinar

236

U.S. Department of Energy FreedomCar & Vehicle Technologies Program CARB Executive Order Exemption Process for a Hydrogen-fueled Internal Combustion engine Vehicle -- Status Report  

DOE Green Energy (OSTI)

The CARB Executive Order Exemption Process for a Hydrogen-fueled Internal Combustion Engine Vehicle was undertaken to define the requirements to achieve a California Air Resource Board Executive Order for a hydrogenfueled vehicle retrofit kit. A 2005 to 2006 General Motors Company Sierra/Chevrolet Silverado 1500HD pickup was assumed to be the build-from vehicle for the retrofit kit. The emissions demonstration was determined not to pose a significant hurdle due to the non-hydrocarbon-based fuel and lean-burn operation. However, significant work was determined to be necessary for Onboard Diagnostics Level II compliance. Therefore, it is recommended that an Experimental Permit be obtained from the California Air Resource Board to license and operate the vehicles for the durability of the demonstration in support of preparing a fully compliant and certifiable package that can be submitted.

Not Available

2008-04-01T23:59:59.000Z

237

MN Center for Renewable Energy: Cellulosic Ethanol, Optimization of Bio-fuels in Internal Combustion Engines, & Course Development for Technicians in These Areas  

DOE Green Energy (OSTI)

This final report for Grant #DE-FG02-06ER64241, MN Center for Renewable Energy, will address the shared institutional work done by Minnesota State University, Mankato and Minnesota West Community and Technical College during the time period of July 1, 2006 to December 30, 2008. There was a no-cost extension request approved for the purpose of finalizing some of the work. The grant objectives broadly stated were to 1) develop educational curriculum to train technicians in wind and ethanol renewable energy, 2) determine the value of cattails as a biomass crop for production of cellulosic ethanol, and 3) research in Optimization of Bio-Fuels in Internal Combustion Engines. The funding for the MN Center for Renewable Energy was spent on specific projects related to the work of the Center.

John Frey

2009-02-22T23:59:59.000Z

238

NREL: Systems Engineering - Workshops  

NLE Websites -- All DOE Office Websites (Extended Search)

Workshops The Wind Energy Systems Engineering Workshop is a biennial workshop that invites speakers from academia, industry, and international research laboratories to discuss...

239

International Symposium on Air Breathing Engines, 9th, Athens, Greece, Sept. 3-8, 1989, Proceedings. Volumes 1 2  

SciTech Connect

The conference presents papers on the National Aerospace Plane Program, highly loaded axial flow compressors, Swedish philosophy in aeroengine development, the active control of engine instabilities, and turbulent free shear layer mixing and combustion. Consideration is also given to direct and hybrid solutions of three-dimensional flow in axial radial turbomachines using the mean stream surface method, the numerical simulation of turbomachinery flows with a simple ONERA model of viscous effects, and the combustion characteristics of a boron-fueled SFRJ with aft burner. Other topics include studies on the influence of Mach number on profile losses of a reaction turbine cascade, flow in compressor interstage ducts, and full-scale liquid fuel ramjet combustor tests.

Billig, F.S.

1989-01-01T23:59:59.000Z

240

CAM/LIFTER forces and friction. Final report, September 15, 1988--November 30, 1991  

DOE Green Energy (OSTI)

This report details the procedures used to measure the cam/lifter forces and friction. The present effort employed a Cummins LTA-10, and focuses on measurements and dynamic modeling of the injector train. The program was sponsored by the US Department of Energy in support of advanced diesel engine technology. The injector train was instrumented to record the instantaneous roller speed, roller pin friction torque, pushrod force, injector link force and cam speed. These measurements, together with lift profiles for pushrod and injector link displacement, enabled the friction work loss in the injector train to be determined. Other significant design criteria such as camshaft roller follower slippage and maximum loads on components were also determined. Future efforts will concentrate on the dynamic model, with tests run as required for correlation.

Gabbey, D.J.; Lee, J.; Patterson, D.J.

1992-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Multiphase Stirling Engines  

E-Print Network (OSTI)

Analysis, design, fabrication, and experimental assessment of a symmetric three-phase free-piston Stirling engine system is discussed in this paper. The system is designed to operate with moderate-temperature heat input that is consistent with solar-thermal collectors. Diaphragm pistons and nylon flexures are considered for this prototype to eliminate surface friction and to provide appropriate seals. In addition, low loss diaphragm pistons, etched and woven-wire screen heat exchangers, and plastic flexures, as the main components of the system, are outlined. The experimental results are presented and compared with design analysis. Experiments successfully confirm the design models for heat exchanger flow friction losses and gas spring hysteresis dissipation. Furthermore, it is revealed that gas spring hysteresis loss is an important dissipation phenomenon for low-power Stirling engines and should be carefully addressed in design. Analysis shows that the gas hysteresis dissipation is reduced drastically by increasing the number of phases in a multiphase Stirling engine system. It is further shown that for an even number of phases, half of the engine chambers could be eliminated by utilizing a reversing mechanism within the multiphase system. The mathematical formulation and modal analysis of multiphase Stirling engine system are then extended to a system that incorporates a reverser. By introducing a reverser to the fabricated prototype, the system successfully operates in engine mode. The system proves its self-starting capability and validates the computed start-up temperature. ?DOI: 10.1115/1.3097274? 1

Artin Der Minassians; Seth R. Sanders

2009-01-01T23:59:59.000Z

242

A Model of Unemployment with Matching Frictions and Job Rationing  

E-Print Network (OSTI)

stochastic general equilibrium model in which large, monopolistic firms face a labor market with matching frictions,

Michaillat, Pascal

2010-01-01T23:59:59.000Z

243

Does Ekman Friction Suppress Baroclinic Instability?  

Science Conference Proceedings (OSTI)

The effect of Ekman friction on baroclinic instability is reexamined in order to address questions raised by Farrell concerning the existence of normal mode instability in the atmosphere. As the degree of meridional confinement is central to the ...

Shian-Jiann Lin; Raymond T. Pierrehumbert

1988-10-01T23:59:59.000Z

244

Normal Mode Initialization with Elementary Surface Friction  

Science Conference Proceedings (OSTI)

Various normal-mode initialization techniques are applied to a simple 12-level linear model with boundary layer friction, and results are compared to exact solutions of the model. It is found that Machenhauer's initialization scheme gives an ...

Bradley A. Ballish; Ferdinand Baer

1985-02-01T23:59:59.000Z

245

Friction Stir Welding and Processing II  

Science Conference Proceedings (OSTI)

Jan 1, 2007 ... Friction Stir Welding and Processing II by K.V. Jata, M.W. Mahoney, R.S. Mishra, S.L. Semiatin, and T. Lienert, editors ...

246

Friction Stir Welding: Light Materials II  

Science Conference Proceedings (OSTI)

Mar 6, 2013... interests to automotive industry due to fuel economy and emission regulation. .... a mixture solution of ice and water to freeze the microstructure. ... for the friction stir weld tool, have produced joints of adequate performance, ...

247

Frictional forces in helical buckling of tubing  

SciTech Connect

Previous analyses of helical buckling of tubing have not considered frictional forces. This paper describes the modifications to helical buckling theory necessary to include friction. The first need is a relationship between the buckling force and the casing to tubing contact force. This contact force is determined through use of the principle of virtual work. The next need is the relationship between the friction forces, the buckling force, and the geometry of the tubing helix. Differential equations are derived and solved for two cases of interest: buckling during the landing of the tubing and thermal and differential pressure loading subsequent to landing. Several example problems are examined to evaluate the relative importance of friction.

Mitchell, R.F.

1984-09-01T23:59:59.000Z

248

DOE Hydrogen Analysis Repository: Future Fuel Cell and Internal...  

NLE Websites -- All DOE Office Websites (Extended Search)

Future Fuel Cell and Internal Combustion Engine Automobile Technologies Project Summary Full Title: Future Fuel Cell and Internal Combustion Engine Automobile Technologies: A...

249

Enhancing Thermal Conductivity and Reducing Friction  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratory currently has several projects underway to develop advanced fluids, films, coatings, and Laboratory currently has several projects underway to develop advanced fluids, films, coatings, and processes to improve thermal conductivity and reduce friction. These measures are helping to increase energy efficiency for next-generation transportation applications. Superhard and Slick Coating (SSC) Opportunity: Friction, wear, and lubrication strongly affect the energy efficiency, durability, and environmental compatibility of

250

International Conference on Mathematics and Computational Methods Applied to Nuclear Science & Engineering (M&C 2013) Sun Valley, Idaho, USA, May 5-9, 2013, on CD-ROM, American Nuclear Society, LaGrange Park, IL (2013)  

E-Print Network (OSTI)

and Simulation of Nuclear Reactors under U.S. Department of Energy Contract No. DE-AC05-00OR22725, National for Solving k-Eigenvalue Problems in Neutron Diffusion Theory," Nuclear Science and Engineering, 167, pp. 141International Conference on Mathematics and Computational Methods Applied to Nuclear Science

Kelley, C. T. "Tim"

251

Friction Stir Processing for Efficient Manufacturing  

SciTech Connect

Friction at contacting surfaces in relative motion is a major source of parasitic energy loss in machine systems and manufacturing processes. Consequently, friction reduction usually translates to efficiency gain and reduction in energy consumption. Furthermore, friction at surfaces eventually leads to wear and failure of the components thereby compromising reliability and durability. In order to reduce friction and wear in tribological components, material surfaces are often hardened by a variety of methods, including conventional heat treatment, laser surface hardening, and thin-film coatings. While these surface treatments are effective when used in conjunction with lubrication to prevent failure, they are all energy intensive and could potentially add significant cost. A new concept for surface hardening of metallic materials and components is Friction Stir Processing (FSP). Compared to the current surface hardening technologies, FSP is more energy efficient has no emission or waste by products and may result in better tribological performance. FSP involves plunging a rotating tool to a predetermined depth (case layer thickness) and translating the FSP tool along the area to be processed. This action of the tool produces heating and severe plastic deformation of the processed area. For steel the temperature is high enough to cause phase transformation, ultimately forming hard martensitic phase. Indeed, FSP has been used for surface modification of several metals and alloys so as to homogenize the microstructure and refine the grain size, both of which led to improved fatigue and corrosion resistance. Based on the effect of FSP on near-surface layer material, it was expected to have beneficial effects on friction and wear performance of metallic materials. However, little or no knowledge existed on the impact of FSP concerning friction and wear performance the subject of the this project and final report. Specifically for steel, which is the most dominant tribological material, FSP can replace the current conventional surface hardening techniques used for friction and wear performance. Friction Stir Link Inc. (FSL) is teamed with Argonne National Laboratory (ANL) to develop and optimize FSP for friction and wear performance enhancement. The ultimate goal is to offer FSP and an effective alternative to some of the current energy intensive and high-cost surface hardening processes.

Mr. Christopher B. Smith; Dr. Oyelayo Ajayi

2012-01-31T23:59:59.000Z

252

Steam assisted gas turbine engine  

SciTech Connect

A gas turbine engine is disclosed which has an integral steam power system consisting of heat absorbing boilers which convert an unpressurized liquid into an expanded and heated steam by utilizing heat normally lost through component cooling systems and the exhaust system. Upon completion of the steam power cycle, the steam is condensed back to a liquid state through a condensing system located within the compressor and other functional components of the gas turbine engine. A system of high pressure air and friction seals restrict steam or liquid condensate within designed flow bounds. The gas turbine engine disclosed is designed to give improved fuel efficiency and economy for aircraft and land use applications.

Coronel, P.D.

1982-06-08T23:59:59.000Z

253

Mechanical Energy and Power Systems Laboratory Mechanical Energy and Power Systems Laboratory Proceedings of the ASME 2009 International Mechanical Engineering Conference and  

E-Print Network (OSTI)

in the past, re- cent developments in Stirling engine technology utilizing rolling diaphragm seals will be demonstrated, by generating a variable radius piston for the liquid piston Stirling engine. The first step Work This cycle optimization process appears to show great promise in decreasing Stirling engine

Van de Ven, James D.

254

Rigidity sensing by stochastic sliding friction  

E-Print Network (OSTI)

The sliding friction force exerted by stochastic linkers interacting with a moving filament is calculated. The elastic properties of the substrate on which the linkers are anchored are shown to strongly influence the friction force. In some cases, the force is maximal for a finite substrate rigidity. Collective effects give rise to a dynamical instability resulting in a stick-slip behaviour, which is substrate-sensitive. The relevance of these results for the motility of crawling cells powered by an actin retrograde flow is discussed.

Pierre Sens

2013-10-30T23:59:59.000Z

255

Comments on “Frictional Dissipation in a Precipitating Atmosphere”  

Science Conference Proceedings (OSTI)

Pauluis et al. argue that frictional dissipation of energy around falling hydrometeors is an important entropy source in the tropical atmosphere. Their calculations suggest that the frictional dissipation around hydrometeors is about ? of the ...

Nilton O. Rennó

2001-05-01T23:59:59.000Z

256

Correlations to predict frictional pressure loss of hydraulic-fracturing slurry in coiled tubing  

Science Conference Proceedings (OSTI)

Compared with conventional-tubing fracturing, coiled-tubing (CT) fracturing has several advantages. CT fracturing has become an effective stimulation technique for multizone oil and gas wells. It is also an attractive production-enhancement method for multiseam coalbed-methane wells, and wells with bypassed zones. The excessive frictional pressure loss through CT has been a concern in fracturing. The small diameter of the string limits the cross-sectional area open to flow. Furthermore, the tubing curvature causes secondary flow and results in extra flow resistance. This increased frictional pressure loss results in high surface pumping pressure. The maximum possible pump rate and sand concentration, therefore, have to be reduced. To design a CT fracturing job properly, it is essential to predict the frictional pressure loss through the tubing accurately. This paper presents correlations for the prediction of frictional pressure loss of fracturing slurries in straight tubing and CT. They are developed on the basis of full-scale slurry-flow tests with 11/2-in. CT and slurries prepared with 35 lbm/1,000 gal of guar gel. The extensive experiments were conducted at the full-scale CT-flow test facility. The proposed correlations have been verified with the experimental data and actual field CT-fracturing data. Case studies of wells recently fractured are provided to demonstrate the application of the correlations. The correlations will be useful to the CT engineers in their hydraulics design calculations.

Shah, S.; Zhoi, Y.X.; Bailey, M.; Hernandez, J. [University of Oklahoma, Norman, OK (United States)

2009-08-15T23:59:59.000Z

257

Friction Stir Welding and Processing of Nickel Based Superalloys  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Joining and Sustaining of Superalloys. Presentation Title, Friction Stir Welding ...

258

Fundamentals of Friction Stir Welding and Processing Short Course  

Science Conference Proceedings (OSTI)

Meeting Home · Meeting Registration · Curriculum · About the Presenters · Housing · Sponsor · Download Flyer. Fundamentals of Friction Stir Welding and ...

259

International Power Engineering Research Collaborations  

E-Print Network (OSTI)

range from market mechanisms to renewable en- ergy integration and from specific power topics to inter- disciplinary projects. Index Terms Collaborative Research and Educa- tion, Renewable Energy, Market Mechanisms with foreign institutions in Spain, Brazil, China and Ma- laysia. The presentation discusses the objectives

Gross, George

260

International Governance of Climate Engineering  

E-Print Network (OSTI)

paper for the Solar Radiation Management Governancepaper for the Solar Radiation Management Governancepaper for the Solar Radiation Management Governance

Parson, Edward; Ernst, Lia

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Wind Waves and Moveable-Bed Bottom Friction  

Science Conference Proceedings (OSTI)

Effects of moveable-bed bottom friction for wave observations and wave modeling are investigated using a state-of-the-art bottom friction model. This model combines the hydrodynamic friction model of Madsen et al. with a moveable-bed roughness ...

Hendrik L. Tolman

1994-05-01T23:59:59.000Z

262

Parameters defining flow resistance and the friction factor behavior in liquid annular seals with deliberately roughened surfaces  

E-Print Network (OSTI)

Non-contacting annular seals are internal sealing devices used in rotating machinery, such as multistage centrifugal pumps and compressors. Their design affects both efficiency and rotor stability. Traditional plain and labyrinth seals are being replaced with stators containing different roughness patterns to reduce leakage and enhance rotor response. Several roughened seal experiments with liquid and air have produced leakage data indicating that the friction factor increases as the seal clearance is increased. Simplified models based on bulk flow theory and Moody�s approach to characterize wall friction in pipes cannot explain this outcome. This research is an extension of a 2-D numerical analysis of flat plate experiments with water which found that friction factor of these surfaces is governed by the roughness� ability to develop high static pressures. An exhaustive 3-D numerical analysis of several experiments with liquid annular seals has been performed using a CFD code. Direct numerical simulations (DNS) of turbulent channel flow and smooth seals were replicated within 1% using Reynolds-averaged Navier-Stokes (RANS) equations and turbulence modeling. Similarly, measured groove seal leakage rates were reproduced within 2%. On the other hand, no turbulence model combination predicts the leakage in most 3-D pattern roughened seals with the same accuracy. Present results reproduce the friction factor �plateau� behavior predicted with the 2-D analysis and observed in the flat plate experiments. They also reproduce the friction-factor-to-clearance indifference behavior, the maximum friction factor observed in a specific roughness pattern size is independent of the actual clearance in a certain Reynolds number range, but clarify the role of the roughness length-to-clearance ratio and the actual roughness size in defining the friction-factor-toclearance proportionality. All simulations indicate that roughened surface area and roughness aspect ratios are the parameters defining the friction factor at a given seal clearance. The roughness pattern size, relevant in determining the friction-factor-to-clearance proportionality, plays a moderate role once the above cited ratios are defined. In any shape and size, shallow patterns are predicted and observed to provide larger friction factors than deep patterns. Predictions also confirm limited experimental data showing that friction factor is affected by the mean flow orientation relative to the roughness pattern. Solving RANS equations is sufficient to model simple seal geometries but might not be enough to replicate turbulent flow in liquid annular seals with roughened surfaces.

Villasmil Urdaneta, Larry Alfonso

2006-08-01T23:59:59.000Z

263

Perspectives on software product lines: report on first international workshop on software product lines: economics, architectures, and implications workshop #15 at 22nd international conference on software engineering (ICSE)  

Science Conference Proceedings (OSTI)

Product line engineering is a concept that has emerged in the 80's in the business schools and is now among the hottest topics in software engineering.Software product lines aim at achieving scope economies through synergetic development of software ...

Peter Knauber; Giancarlo Succi

2001-03-01T23:59:59.000Z

264

NREL: Photovoltaics Research - Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

Photovoltaic Engineering Photovoltaic Engineering Photovoltaic (PV) Engineering at NREL supports commercial and emerging PV technology development. Our support covers the following three areas: Engineering Testing and Evaluation. We provide engineering testing and evaluation of PV products developed by companies during work sponsored by the U.S. Department of Energy (DOE). We determine if products meet performance criteria established by DOE for a company's contractual obligations. Standards Development. We support the development of national and international standards. Current work includes investigating methods of preconditioning cadmium telluride and copper indium gallium diselenide PV modules so that when they are tested for reporting conditions, the results are correlated with subsequent field measurements.

265

Displacer for Stirling engine  

SciTech Connect

In a Stirling engine and the like, a displacer piston having a plurality of internal baffles and insulation so as to prevent undesired heat transfer across the displacer piston.

Brown, A. T.

1985-12-24T23:59:59.000Z

266

Some Hamiltonian models of friction II  

Science Conference Proceedings (OSTI)

In the present paper we consider the motion of a very heavy tracer particle in a medium of a very dense, non-interacting Bose gas. We prove that, in a certain mean-field limit, the tracer particle will be decelerated and come to rest somewhere in the medium. Friction is caused by emission of Cerenkov radiation of gapless modes into the gas. Mathematically, a system of semilinear integro-differential equations, introduced in Froehlich et al. ['Some hamiltonian models of friction,' J. Math. Phys. 52(8), 083508 (2011)], describing a tracer particle in a dispersive medium is investigated, and decay properties of the solution are proven. This work is an extension of Froehlich et al. ['Friction in a model of hamiltonian dynamics,' Commun. Math. Phys. 315(2), 401-444 (2012)]; it is an extension because no weak coupling limit for the interaction between tracer particle and medium is assumed. The technical methods used are dispersive estimates and a contraction principle.

Egli, Daniel; Gang Zhou [Institute for Theoretical Physics, ETH Zurich, CH-8093 Zuerich (Switzerland)

2012-10-15T23:59:59.000Z

267

Gas-liquid pressure drop in vertical internally wavy 90 bend  

SciTech Connect

Experiments of air water two-phase flow pressure drop in vertical internally wavy 90 bend have been carried out. The tested bends are flexible and made of stainless steel with inner diameter of 50 mm and various curvature radiuses of 200, 300, 400 and 500 mm. The experiments were performed under the following conditions of two-phase parameters; mass flux from 350 to 750 kg/m{sup 2} s. Gas quality from 1% to 50% and system pressure from 4 to 7.5 bar. The results demonstrate that the effect of the above-mentioned parameters is very significant at high ranges of mass flow quality. Due to the increasing of two-phase flow resistance, energy dissipations, friction losses and interaction of the two-phases in the vertical internally wavy 90 bend the total pressure drops are perceptible about 2-5 times grater than that in smooth bends. Based on the mass and energy balance as well as the presented experimental results, new empirical correlation has been developed to calculate the two-phase pressure drop and hence the two-phase friction factor of the tested bends. The correlation includes the relevant primary parameter, fit the data well, and is sufficiency accurate for engineering purposes. (author)

Benbella, Shannak [Department of Mechanical Engineering, Al-Balqa Applied University, Al-Huson University College, P.O. Box 50, Al-Huson (Jordan); Al-Shannag, Mohammad; Al-Anber, Zaid A. [Department of Chemical Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, P.O. Box 15008, Marka 11134, Amman (Jordan)

2009-01-15T23:59:59.000Z

268

Engineering and Structural Mechanics - Nuclear Engineering Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering and Structural Mechanics Engineering and Structural Mechanics Capabilities Engineering Computation and Design Engineering and Structural Mechanics Overview Areas of Application Examples of Analyses Systems/Component Design, Engineering and Drafting Heat Transfer and Fluid Mechanics Multi-physics Reactor Performance and Safety Simulations Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Engineering and Structural Mechanics Bookmark and Share Analysis of a Reinforced Concrete Structure using the NEPTUNE Finite Element Code Analysis of a Reinforced Concrete Structure using the NEPTUNE Finite Element Code. Depicted are Cracks in the Concrete Surface due to an Internal Pressurization. Click on image to view larger image.

269

Engines - Spark Ignition Engines  

NLE Websites -- All DOE Office Websites (Extended Search)

Spark Ignition Engines Spark Ignition Engines Thomas Wallner and omni engine Thomas Wallner and the omnivorous engine Background Today the United States import more than 60% of its crude oil and petroleum products. Transportation accounts for a major portion of these imports. Research in this field is focused on reducing the dependency on foreign oil by increasing the engine efficiency on the one hand and blending gasoline with renewable domestic fuels, such as ethanol, on the other. Argonne's Research The main focus of research is on evaluation of advanced combustion concepts and effects of fuel properties on engine efficiency, performance and emissions. The platforms used are a single-cylinder research engine as well as an automotive-size four-cylinder engine with direct fuel injection.

270

Experimental Study on Friction Welding of 6063 Aluminium Alloy ...  

Science Conference Proceedings (OSTI)

Friction pressure, upset pressure, burn-off length is varied and rotational speed and ... and Microstructure of Tandem Submerged Arc Welded X80 Pipeline Steel.

271

Friction Stir Welding and Processing of Advanced Materials for Coal ...  

Science Conference Proceedings (OSTI)

Presentation Title, Friction Stir Welding and Processing of Advanced Materials for Coal and Nuclear Power Applications. Author(s), Glenn J. Grant, Scott Weil, ...

272

Development of Friction Stir Welding Technology for Coal and ...  

Science Conference Proceedings (OSTI)

Presentation Title, Development of Friction Stir Welding Technology for Coal and ... Abstract Scope, Most ferritic/martensitic steels used in coal and nuclear plant ...

273

Friction Stir Processing as a Base Metal Preparation Technique for ...  

Science Conference Proceedings (OSTI)

The combination of fusion zone and heat affected zone grain refinement is a unique ... Friction Stir Spot Welding of Magnesium to Aluminum Alloys with a Cold ...

274

Fabrication of surface composite via additive friction stir technology  

Science Conference Proceedings (OSTI)

In this presentation additive friction stir technology is demonstrated as viable surface composite ... Conditioning of Composite Lubricant Powder for Cold Spray .

275

Ceramics Technology Project database: September 1991 summary report. [Materials for piston ring-cylinder liner for advanced heat/diesel engines  

DOE Green Energy (OSTI)

The piston ring-cylinder liner area of the internal combustion engine must withstand very-high-temperature gradients, highly-corrosive environments, and constant friction. Improving the efficiency in the engine requires ring and cylinder liner materials that can survive this abusive environment and lubricants that resist decomposition at elevated temperatures. Wear and friction tests have been done on many material combinations in environments similar to actual use to find the right materials for the situation. This report covers tribology information produced from 1986 through July 1991 by Battelle columbus Laboratories, Caterpillar Inc., and Cummins Engine Company, Inc. for the Ceramic Technology Project (CTP). All data in this report were taken from the project's semiannual and bimonthly progress reports and cover base materials, coatings, and lubricants. The data, including test rig descriptions and material characterizations, are stored in the CTP database and are available to all project participants on request. Objective of this report is to make available the test results from these studies, but not to draw conclusions from these data.

Keyes, B.L.P.

1992-06-01T23:59:59.000Z

276

Friction and wear performance of low-friction carbon coatings under oil lubrication.  

DOE Green Energy (OSTI)

Amorphous carbon coatings with very low friction properties were recently developed at Argonne National Laboratory. These coatings have shown good promise in mitigating excessive wear and scuffing problems associated with low-lubricity diesel fuels. To reduce the negative effect of sulfur and other lubricant additives in poisoning the after-treatment catalyst, a lubricant formulation with a low level of sulfur may be needed. Exclusion of proven sulfur-containing extreme pressure (EP) and antiwear additives from oils will require other measures to ensure durability of critical lubricated components. The low-friction carbon coating has the potential for such applications. In the present study, we evaluated the friction and wear attributes of three variations of the coating under a boundary lubrication regime. Tests were conducted with both synthetic and mineral oil lubricants using a ball-on-flat contact configuration in reciprocating sliding. Although the three variations of the coating provided modest reductions in friction coefficient, they all reduced wear substantially compared to an uncoated surface. The degradation mode of oxidative wear on the uncoated surface was replaced by a polishing wear mode on the coated surfaces.

Kovalchenko, A.; Ajayi, O. O.; Erdemir, A.; Fenske, G. R.

2001-12-11T23:59:59.000Z

277

Friction and lubrication in metal rolling  

E-Print Network (OSTI)

on the ellipticity 'IjJ (appendix E). (= a/ c in chapter 3) , real area of contact ratio. length of arc of contact in rolling (chapters 4 and 5). semi-axis of Hertz contact ellipse in transverse direction (appendix E). half indenter spacing (chapter 3). half... the friction and lubrication conditions are especially critical. This is confirm~d by Cheng [15], who discusses the practical requirements of an aluminium foil rolling lubricant and is demonstrated in a theoretical analysis of foil rolling by Fleck and J...

Sutcliffe, Michael Patrick Forbes

1989-11-14T23:59:59.000Z

278

Multiyear Program Plan: Reducing Friction and Wear in Heavy Vehicles  

DOE Green Energy (OSTI)

As described in its multiyear program plan for 1998-2000, the Office of Heavy Vehicle Technologies (OHVT) envisions the development of a fuel-flexible, energy-efficient, near-zero-emissions, heavy-duty U.S. diesel engine technology devolving into all truck classes as a real and viable strategy for reducing energy requirements for commercial transport services and the rapidly growing multipurpose vehicle market (pickups, vans, and sport utility vehicles). Implementation of the OHVT program plan will have significant national benefits in energy savings, cleaner air, more jobs, and increased gross domestic product (GDP). Successful implementation will reduce the petroleum consumption of Class 1-8 trucks by 1.4 million barrels of oil per day by 2020 and over 1.8 million by 2030, amounting to a reduction in highway petroleum consumption of 13.2% and 18.6%, respectively. All types of regulated emissions will be reduced, that is, 20% drop in PM10 emissions (41,000 metric tons per year) by 203 0, 17% reduction in CO2 greenhouse gases (205 million metric tons per year), 7% reduction in NOx, 20% reduction in NMHC, and 30% reduction in CO. An increase of 15,000 jobs by 2020 is expected, as is an increase of $24 billion in GDP. The strategy of OHVT is to focus primarily on the diesel engine since it has numerous advantages. It has the highest efficiency of any engine today, 45% versus 30% for production gasoline engines; and it can be made more efficient at least to 55% and possibly up to 63%. It is the engine of choice for heavy vehicles (trucks), because it offers power, efficiency, durability, and reliability and is used extensively in rail, marine, and off-road applications. Its emission can be ultra-low to near zero, and the production infrastructure is already in place. The primary goals of OHVT are as follows: (1) Develop by 2002 the diesel-engine enabling technologies to support large-scale industry dieselization of light trucks, achieving a 35% fuel efficiency improvement over equivalent gasoline-fueled trucks. (2) Develop by 2004 the enabling technology for a Class 7-8 truck with a fuel efficiency of 10 mpg (at 65 mph) that will meet prevailing emission standards, using either diesel or a liquid alternative fuel. (3) Develop by 2006 diesel engines with fuel flexibility and a thermal efficiency of 55% with liquid alternative fuels, and a thermal efficiency of 55% with dedicated gaseous fuels. (4) Develop a methodology for analyzing and evaluating the operation of a heavy vehicle as an integrated system, considering such factors as engine efficiency; emissions; rolling resistance; aerodynamic drag; friction, wear, and lubrication effects; auxiliary power units; material substitutions for reducing weight; and other sources of parasitic energy losses. Overarching these considerations is the need to preserve system functionality, cost, competitiveness, reliability, durability, and safety.

R.R. Fessler; G.R. Fenske

1999-12-13T23:59:59.000Z

279

Proceedings Ninth International Conference on Human-Computer Interaction, August, 2001 Effect of Web Search Engine Design on User Performance and Preference  

E-Print Network (OSTI)

this usage, the participants said they employed several search engines because entering the same query complete the first task by using words included in the task scenario as search terms (e.g., "New York City follow. #12;3.1 Query terms When performing the searches, some participants did not group appropriate

280

Surface Wind over Tropical Oceans: Diagnosis of the Momentum Balance, and Modeling the Linear Friction Coefficient  

Science Conference Proceedings (OSTI)

Previous diagnostic studies of surface wind momentum balances over tropical oceans showed that, under a linear friction assumption, the meridional friction coefficient is two to three times larger than the zonal friction coefficient, and that ...

John C. H. Chiang; Stephen E. Zebiak

2000-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Lubricated Reciprocating Frictional Properties of Marine Cylinder ...  

Science Conference Proceedings (OSTI)

... Process Design of the Ductile Cast Iron Cylinder Head for Marine Diesel Engine ... Heavy Section Ductile Iron Castings for Use in Wind Turbine Generators.

282

Hydraulic Control of Sill Flow with Bottom Friction  

Science Conference Proceedings (OSTI)

The hydraulics of strait and sill flow with friction is examined using a reduced gravity model. It is shown that friction moves the critical (or control) point from the sill to a location downstream. If the strait has constant width, the control ...

L. J. Pratt

1986-11-01T23:59:59.000Z

283

The Modeling of Slurry Friction Loss of Hydraulic Fracturing  

Science Conference Proceedings (OSTI)

In recent years, the research on theoretical model of hydraulic fracturing has experienced development. But there is little progress in the research on slurry friction loss in the fracturing string, which is the key to guide the design and construction ... Keywords: slurry, friction loss, momentum transfer

Yongming Li; Hu Mao; Fengsheng Yao; Song Wang; Jinzhou Zhao

2011-10-01T23:59:59.000Z

284

ME 374C Combustion Engine Processes ABET EC2000 syllabus  

E-Print Network (OSTI)

ME 374C ­ Combustion Engine Processes Page 1 ABET EC2000 syllabus ME 374C ­ Combustion Engine combustion engines, fuels, carburetion, combustion, exhaust emissions, knock, fuel injection, and factors to an appropriate major sequence in engineering. Textbook(s): Internal Combustion Engines and Automotive Engineering

Ben-Yakar, Adela

285

Evolution of microstructure and mechanical properties in linear friction welded waspaloy.  

E-Print Network (OSTI)

??The Ni-base superalloy, Waspaloy, was linear friction welded (LFWed) under various processing conditions. Specifically, axial shortening, in which all linear friction welding (LFW) parameters such… (more)

Chamanfar, Ahmad

2013-01-01T23:59:59.000Z

286

Experimental investigation of turbine blade platform film cooling and rotational effect on trailing edge internal cooling  

E-Print Network (OSTI)

The present work has been an experimental investigation to evaluate the applicability of gas turbine cooling technology. With the temperature of the mainstream gas entering the turbine elevated above the melting temperature of the metal components, these components must be cooled, so they can withstand prolonged exposure to the mainstream gas. Both external and internal cooling techniques have been studied as a means to increase the life of turbine components. Detailed film cooling effectiveness distributions have been obtained on the turbine blade platform with a variety of cooling configurations. Because the newly developed pressure sensitive paint (PSP) technique has proven to be the most suitable technique for measuring the film effectiveness, it was applied to a variety of platform seal configurations and discrete film flows. From the measurements it was shown advanced seals provide more uniform protection through the passage with less potential for ingestion of the hot mainstream gases into the engine cavity. In addition to protecting the outer surface of the turbine components, via film cooling, heat can also be removed from the components internally. Because the turbine blades are rotating within the engine, it is important to consider the effect of rotation on the heat transfer enhancement within the airfoil cooling channels. Through this experimental investigation, the heat transfer enhancement has been measured in narrow, rectangular channels with various turbulators. The present experimental investigation has shown the turbulators, coupled with the rotation induced Coriolis and buoyancy forces, result in non-uniform levels of heat transfer enhancement in the cooling channels. Advanced turbulator configurations can be used to provide increased heat transfer enhancement. Although these designs result in increased frictional losses, the benefit of the heat transfer enhancement outweighs the frictional losses.

Wright, Lesley Mae

2006-08-01T23:59:59.000Z

287

1 Comments of ASTM International FR Doc. 2010-30864 ...  

Science Conference Proceedings (OSTI)

... agency (and even within different sub- units ... International joined the International Code Council; the ... Air-Conditioning Engineers (ASHRAE); the US ...

2012-11-26T23:59:59.000Z

288

Small engine control by fuzzy logic  

Science Conference Proceedings (OSTI)

Small spark-ignition gasoline-fuelled internal-combustion engines can be found all over the world performing in various roles including power generation, agricultural applications and motive power for small boats. To attain low cost, these engines are ... Keywords: applied artificial intelligence, emissions reduction, engine control, engine management systems, fuzzy control, intelligent system

S. H. Lee; R. J. Howlett; S. D. Walters

2004-12-01T23:59:59.000Z

289

On-Engine Ammonia Detection Using Evanescent Fields  

the study of catalyst performance in internal combustion engines. Inventor CONNATSER, RAYNELLA M Energy & Transportation Science Division Licensing Contact

290

International Activities | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

International Activities International Activities International Activities International Activities The International Program assists the DOE Office of Environmental Management (EM) in identifying technologies and strategies for waste processing, groundwater and soil remediation, spent nuclear fuel and surplus nuclear material disposition, and facility deactivation and decommissioning. The International Program seeks to transform advances in science and engineering into practical solutions for environmental remediation. Collaboration with governmental, academic, and industrial organizations in other countries expands the technical depth of the EM program. Working with the international community offers the opportunity to develop consensus on approaches to science, technology and policy for environmental

291

The effect of Coulombic friction on spatial displacement statistics  

E-Print Network (OSTI)

The phenomenon of Coulombic friction enters the stochastic description of dry friction between two solids and the statistic characterization of vibrating granular media. Here we analyze the corresponding Fokker-Planck equation including both velocity and spatial components, exhibiting a formal connection to a quantum mechanical harmonic oscillator in the presence of a delta potential. Numerical solutions for the resulting spatial displacement statistics show a crossover from exponential to Gaussian displacement statistics. We identify a transient intermediate regime that exhibits multiscaling properties arising from the contribution of Coulombic friction. The possible role of these effects during observations in diffusion experiments is shortly discussed.

Andreas M. Menzel; Nigel Goldenfeld

2010-10-30T23:59:59.000Z

292

The effect of Coulombic friction on spatial displacement statistics  

E-Print Network (OSTI)

The phenomenon of Coulombic friction enters the stochastic description of dry friction between two solids and the statistic characterization of vibrating granular media. Here we analyze the corresponding Fokker-Planck equation including both velocity and spatial components, exhibiting a formal connection to a quantum mechanical harmonic oscillator in the presence of a delta potential. Numerical solutions for the resulting spatial displacement statistics show a crossover from exponential to Gaussian displacement statistics. We identify a transient intermediate regime that exhibits multiscaling properties arising from the contribution of Coulombic friction. These results are relevant to recent experimental studies of the displacement of colloidal particles along bilayer membrane tubes.

Menzel, Andreas M

2010-01-01T23:59:59.000Z

293

Friction Stir Spot Welding of Advanced High Strength Steels  

Science Conference Proceedings (OSTI)

Friction stir spot welding techniques were developed to successfully join several advanced high strength steels. Two distinct tool materials were evaluated to determine the effect of tool materials on the process parameters and joint properties. Welds were characterized primarily via lap shear, microhardness, and optical microscopy. Friction stir spot welds were compared to the resistance spot welds in similar strength alloys by using the AWS standard for resistance spot welding high strength steels. As further comparison, a primitive cost comparison between the two joining processes was developed, which included an evaluation of the future cost prospects of friction stir spot welding in advanced high strength steels.

Hovanski, Yuri; Grant, Glenn J.; Santella, M. L.

2009-11-13T23:59:59.000Z

294

Adaptive controller for regenerative and friction braking system  

DOE Patents (OSTI)

A regenerative and friction braking system for a vehicle having one or more roadwheels driven by an electric traction motor includes a driver responsive device for producing a brake demand signal having a magnitude corresponding to the level of braking force selected by the driver and friction and regenerative brakes operatively connected with the roadwheels of the vehicle. A system according to this invention further includes control means for operating the friction and regenerative braking subsystems so that maximum brake torques sustainable by the roadwheels of the vehicle without skidding or slipping will not be exceeded.

Davis, Roy I. (Ypsilanti, MI)

1990-01-01T23:59:59.000Z

295

Adaptive controller for regenerative and friction braking system  

DOE Patents (OSTI)

A regenerative and friction braking system for a vehicle having one or more road wheels driven by an electric traction motor includes a driver responsive device for producing a brake demand signal having a magnitude corresponding to the level of braking force selected by the driver and friction and regenerative brakes operatively connected with the road wheels of the vehicle. A system according to this invention further includes control means for operating the friction and regenerative braking subsystems so that maximum brake torques sustainable by the road wheels of the vehicle without skidding or slipping will not be exceeded. 8 figs.

Davis, R.I.

1990-10-16T23:59:59.000Z

296

Engineering Institute  

NLE Websites -- All DOE Office Websites (Extended Search)

Engineering Institute Engineering Institute Engineering Institute Engineering dynamics that include flight, vibration isolation for precision manufacturing, earthquake engineering, blast loading, signal processing, and experimental model analysis. Contact Leader, LANL Charles Farrar Email Leader, UCSD Michael Todd Email LANL Program Administrator Jutta Kayser (505) 663-5649 Email Collaboration for conducting mission-driven, multidisciplinary engineering research and recruiting, revitalization, and retention of current & future staff The Engineering Institute is a collaboration between LANL and the University of California at San Diego (UCSD) Jacobs School of Engineering, whose mission is to develop a comprehensive approach for conducting mission-driven, multidisciplinary engineering research

297

Linear Instability with Ekman and Interior Friction. Part I: Quasigeostrophic Eigenanalysis  

Science Conference Proceedings (OSTI)

The eigenvalue problems for the original Eady model and a modified Eady model (the G model) are examined with no friction, Ekman friction only, and both Ekman and interior friction. When both Ekman and interior friction are included in the models,...

Richard Grotjahn; Min Chen; Joseph Tribbia

1995-03-01T23:59:59.000Z

298

Web Engineering Security: A Practitioner's Perspective  

E-Print Network (OSTI)

Glisson,W.B. McDonald,A. Welland,R. International Conference on Web Engineering 2006. Palo Alto, California pp 8 Springer

Glisson, W.B.; McDonald, A.; Welland, R.; International Conference on Web Engineering 2006.; Palo Alto, California pp 8 Springer [More Details

299

Kivun Engineering Ltd | Open Energy Information  

Open Energy Info (EERE)

Kivun Engineering Ltd. Place Tel Aviv, Israel Zip 64371 Sector Solar Product Provides solar thermal water heating systems to the international market. References Kivun...

300

Argonne TTRDC - Engines - Multi-Dimensional Modeling  

NLE Websites -- All DOE Office Websites (Extended Search)

and optimization of internal combustion engines using advanced transportation biofuels will greatly enhance the science for clean energy in the 21st century. Given the cost...

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Advanced Vehicle Testing Activity- Other Internal Combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

Other Internal Combustion Engine Vehicles What's New 2012 Honda Civic CNG Baseline Performance Testing (PDF 292KB) 2013 Volkswagen Jetta TDI Baseline Performance Testing (PDF...

302

Advanced Vehicle Testing Activity: Hydrogen Internal Combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

to someone by E-mail Share Advanced Vehicle Testing Activity: Hydrogen Internal Combustion Engine Vehicle Basics on Facebook Tweet about Advanced Vehicle Testing Activity:...

303

Advanced Vehicle Testing Activity: Other Internal Combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

Other Internal Combustion Engine Vehicles The Advanced Vehicle Testing Activity (AVTA) is tasked by the U.S. Department of Energy's (DOE) Vehicle Technology Office (VTO) to conduct...

304

Advanced Vehicle Testing Activity: Hydrogen Internal Combustion...  

NLE Websites -- All DOE Office Websites (Extended Search)

to someone by E-mail Share Advanced Vehicle Testing Activity: Hydrogen Internal Combustion Engine Vehicle Specifications and Test Procedures on Facebook Tweet about Advanced...

305

International Nuclear Energy Research Initiative: 2010 Annual...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

I-NERI promotes bilateral scientific and engineering research and development (R&D) with other nations. U.S. researchers partner with international organizations,...

306

Futuristic concepts in engines and components  

Science Conference Proceedings (OSTI)

This publication includes papers on two-stroke engines and components, Brayton Stirling and Otto Cycles, alternative cycles, advanced combustion, and other related topics. Contents include: Paving the way to controlled combustion engines (CCE); A new class of stratified-charge internal combustion engine; Internal combustion (IC) engine with minimum number of moving parts; New type of heat engine -- externally heated air engine; A porous media burner for reforming methanol for fuel cell powered electric vehicles; Using a Stirling engine simulation program as a regenerator design aid; In-cylinder regenerated engines; High speed electronic fuel injection for direct injected rotary engine; and The characteristics of fuel consumption and exhaust emissions of the side exhaust port rotary engine.

NONE

1995-12-31T23:59:59.000Z

307

Frictionally Modified Rotating Hydraulic Channel Exchange and Ocean Outflows  

Science Conference Proceedings (OSTI)

Laboratory experiments of two-layer exchange through channels of circular and half-circular cross section are described. Simple theoretical limits on exchange for the circular channels are obtained from models involving either friction or ...

Gregory C. Johnson; Daniel R. Ohlsen

1994-01-01T23:59:59.000Z

308

Trapped Lee Wave Interference in the Presence of Surface Friction  

Science Conference Proceedings (OSTI)

Trapped lee wave interference over double bell-shaped obstacles in the presence of surface friction is examined. Idealized high-resolution numerical experiments with the nonhydrostatic Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS) ...

Ivana Stiperski; Vanda Grubiši?

2011-04-01T23:59:59.000Z

309

The Frictional Nearshore Response to Forcing by Synoptic Scale Winds  

Science Conference Proceedings (OSTI)

An analytic barotropic model was used to study the nearshore frictional response to synoptic-scale wind forcing. The results depend only on the region where the surface and bottom Ekman layers interact strongly and the water is consequently well ...

Gary T. Mitchum; Allan J. Clarke

1986-05-01T23:59:59.000Z

310

Small mass asymptotic for the motion with vanishing friction  

E-Print Network (OSTI)

We consider the small mass asymptotic (Smoluchowski-Kramers approximation) for the Langevin equation with a variable friction coefficient. The friction coefficient is assumed to be vanishing within certain region. We introduce a regularization for this problem and study the limiting motion for the 1-dimensional case and a multidimensional model problem. The limiting motion is a Markov process on a projected space. We specify the generator and boundary condition of this limiting Markov process and prove the convergence.

Mark Freidlin; Wenqing Hu; Alexander Wentzell

2012-01-05T23:59:59.000Z

311

Simple frictional analysis of helical buckling of tubing  

SciTech Connect

Previous analyses of helical buckling of tubing have not considered frictional forces. In this paper, differential equations are derived and solved for two simplified cases of interest: downward motion of the tubing-e.g., when buckling occurs during the landing of the tubing-and upward motion of the tubing-e.g., when buckling occurs as a result of thermal and differential pressure loading subsequent to landing. While somewhat more complicated than the conventional frictionless buckling equations, these solutions are still suitable for hand calculations. These solutions, however, do not represent general solutions to buckling with friction. Load reversals and lateral frictional forces add complications that would require computer analysis. Several examples are examined to evaluate the relative importance of friction, which has a significant impact on tubing length change for loaded cases. For instance, the choice of a conservative value for the friction coefficient may allow the solution of a difficult seal-design problem by reducing a large predicted length change. Friction also has an important effect on set-down loads. Frictionless buckling calculations do not give conservative results for this problem.

Mitchell, R.F.

1986-12-01T23:59:59.000Z

312

US Army Corps of Engineers Engineer Research and Development Center  

E-Print Network (OSTI)

Energy Star or FEMP designated products #12;8 US Army Corps of Engineers® Engineer Research.5% or more in 2013 and beyond (DoD Internal Guidance is 25% by 2025) ­ Energy Efficient Products ­ Install · Renewable, Renewable, Renewable · Net Zero Energy ­ Energy Efficiency (Conservation) ­ Energy Production

313

INTERNATIONAL MASTERS PROGRAMMES 2010 -2011  

E-Print Network (OSTI)

INTERNATIONAL MASTER´S PROGRAMMES 2010 - 2011 MASTER OF SCIENCE IN ENGINEERING MASTER OF SCIENCE IN NATURAL SCIENCES MASTER OF PHILOSOPHY Editorial: Division of Student and Academic Affairs Printed: June ........................................................................................................................................ 3 Norwegian University of Science and Technology (NTNU

Bones, Atle M.

314

INTERNATIONAL MASTERS PROGRAMMES 2012 -2013  

E-Print Network (OSTI)

INTERNATIONAL MASTER´S PROGRAMMES 2012 - 2013 MASTER OF SCIENCE IN ENGINEERING MASTER OF SCIENCE IN NATURAL SCIENCES MASTER OF PHILOSOPHY #12;CONTENTS Introduction ........................................................................................................................................ 3 Norwegian University of Science and Technology (NTNU

Malinnikova, Eugenia

315

Are software engineers true engineers?  

Science Conference Proceedings (OSTI)

Software engineering is an often used term to describe the activities, methods, and tools of large scale software development. There is an ongoing discussion whether Software Engineering can be considered as an engineering discipline. In ...

Claus Lewerentz; Heinrich Rust

2000-01-01T23:59:59.000Z

316

Wind Engineering & Natural Disaster Mitigation  

E-Print Network (OSTI)

Wind Engineering & Natural Disaster Mitigation For more than 45 years, Western University has been internationally recognized as the leading university for wind engineering and wind- related research. Its of environmental disaster mitigation, with specific strengths in wind and earthquake research. Boundary Layer Wind

Sinnamon, Gordon J.

317

Stirling engines  

Science Conference Proceedings (OSTI)

The Stirling engine was invented by a Scottish clergyman in 1816, but fell into disuse with the coming of the diesel engine. Advances in materials science and the energy crisis have made a hot air engine economically attractive. Explanations are full and understandable. Includes coverage of the underlying thermodynamics and an interesting historical section. Topics include: Introduction to Stirling engine technology, Theoretical concepts--practical realities, Analysis, simulation and design, Practical aspects, Some alternative energy sources, Present research and development, Stirling engine literature.

Reader, G.T.; Hooper

1983-01-01T23:59:59.000Z

318

Testing of Compact Bolted Fasteners with Insulation and Friction-Enhanced Shims for NCSX  

SciTech Connect

The fastening of the National Compact Stellarator Experiment's (NCSX) modular coils presented a number of engineering and manufacturing challenges due to the high magnetic forces, need to control induced currents, tight tolerances and restrictive space envelope. A fastening method using high strength studs, jack nuts, insulating spacers, bushings and alumina coated shims was developed which met the requirements. A test program was conducted to verify the design. The tests included measurements of flatness of the spacers, determination of contact area, torque vs. tension of the studs and jack nuts, friction coefficient tests on the alumina and G-10 insulators, electrical tests, and tension relaxation tests due to temperature excursions from room temperature to liquid nitrogen temperatures. This paper will describe the design and the results of the test program.

L. E. Dudek, J.H. Chrzanowski, G. Gettelfinger, P. Heitzenroeder, S. Jurczynski, M. Viola and K. Freudenberg

2009-02-04T23:59:59.000Z

319

Engine Oil Aeration Test FIELD SERVICE SIMULATED  

E-Print Network (OSTI)

Engine Oil Aeration Test OBJECTIVE FIELD SERVICE SIMULATED SPECIFICATIONS The objective of this test is to determine the effectiveness of engine lubricating oils at minimizing air entrainment oil. TEST FIXTURE The test engine is a 1994 International Truck 7.3 liter V-8, four- stroke

Chapman, Clark R.

320

Engine idle speed control system  

SciTech Connect

An idle speed control system is described for an internal combustion engine having a fuel delivery means for supplying fuel to the engine, the idle speed control system comprising in combination: means for controlling the fuel delivery means to supply a scheduled idle fuel quantity during a idle operating state of the engine; means for sensing the engine idle speed; integrator means responsive to the engine idle speed and a desired engine idle speed for adjusting the scheduled idle fuel quantity in direction and amount to cause correspondence between the engine idle speed and the desired engine idle speed, the integrator means adjustment being a measure of engine load conditions; and means for establishing the scheduled idle fuel quantity, the means including (A) means for establishing a family of curves as a function of the amount of integrator adjustment of the scheduled idle fuel quantity, each curve of the family of curves representing idle fuel quantity as a function of engine idle speed for a respective engine load condition, and (B) means for selecting the curve corresponding to the integrator adjustment of the scheduled idle fuel quantity and providing the scheduled fuel quantity from the selected curve in accord with the sensed engine idle speed.

Ament, F.

1986-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Optical engineering  

SciTech Connect

The Optical Engineering thrust area at Lawrence Livermore National Laboratory (LLNL) was created in the summer of 1996 with the following main objectives: (1) to foster and stimulate leading edge optical engineering research and efforts key to carrying out LLNL's mission and enabling major new programs; (2) to bring together LLNL's broad spectrum of high level optical engineering expertise to support its programs. Optical engineering has become a pervasive and key discipline, with applications across an extremely wide range of technologies, spanning the initial conception through the engineering refinements to enhance revolutionary application. It overlaps other technologies and LLNL engineering thrust areas.

Saito, T T

1998-01-01T23:59:59.000Z

322

Friction, Brownian Motion, and Energy Dissipation Mechanisms in Adsorbed  

NLE Websites -- All DOE Office Websites (Extended Search)

Friction, Brownian Motion, and Energy Dissipation Mechanisms in Adsorbed Friction, Brownian Motion, and Energy Dissipation Mechanisms in Adsorbed Molecules and Molecularly Thin Films: Heating, Electrostatic and Magnetic Effects January 15, 2014 4:00PM to 5:00PM Presenter Jacqueline Krim, North Carolina State University Location Building 440, Room A105-106 Type Seminar Series NST Nanoscience Colloquium Abstract: In the study of friction at the nanoscale, phononic, electrostatic, conduction electron and magnetic effects all contribute to the dissipation mechanisms [1,2]. Electrostatic and magnetic contributions are increasingly alluded to in the current literature, but remain poorly characterized. I will first overview the nature of these various contributions, and then report on our observations of magnetic and electrostatic contributions to

323

Texture-induced modulations of friction force: the fingerprint effect  

E-Print Network (OSTI)

Dry solid friction is often accompanied by force modulations originating from stick-slip instabilities. Here a distinct, quasi-static mechanism is evidenced leading to quasi-periodic force oscillations during sliding contact between an elastomer block, whose surface is patterned with parallel grooves, and finely abraded glass slides. The dominant oscillation frequency is set by the ratio between the sliding velocity and the period of the grooves. A mechanical model is proposed that provides a quantitative prediction for the amplitude of the force modulations as a function of the normal load, the period of the grooves and the roughness characteristics of the substrate. The model's main ingredient is the non-linearity of the friction law. Since such non-linearity is ubiquitous for soft solids, this "fingerprint effect" should be relevant to a large class of frictional configurations and might in particular have important consequences in human (or humanoid) active digital touch.

E. Wandersman; R. Candelier; G. Debregeas; Alexis Prevost

2011-07-13T23:59:59.000Z

324

Particulate matter emissions from a DISI engine under cold-fast-idle conditions for ethanol-gasoline blends  

E-Print Network (OSTI)

In an effort to build internal combustion engines with both reduced brake-specific fuel consumption and better emission control, engineers developed the Direct Injection Spark Ignition (DISI) engine. DISI engines combine ...

Dimou, Iason

2011-01-01T23:59:59.000Z

325

Engines - Compression-Ignition - Locomotive Engines - emissions...  

NLE Websites -- All DOE Office Websites (Extended Search)

Locomotive Engine Research Program Drives Down Train Emissions General Motors Electromotive Division locomotive engine EMD Engine Locomotive engine manufacturers face a unique...

326

Experimental and theoretical studies of friction and heat transfer in rough passages  

SciTech Connect

This document discusses activities during this reporting period. A paper based on the results presented in the first final report (DOE/CE/90029-2) and entitled The Role of Transition in Determining Friction and Heat Transfer in Smooth and Rough Passages'' was published in the October issue (Volume 33) of the International Journal of Heat and Mass Transfer. Beginning with the minimum objectives established at the outset of the period covered by this report, the general picture can be summed up as follows: detailed heat transfer and pressure drop (with and without heating) measurements with the smooth tube, fabrication of the eleven (enhanced tube) heat transfer test sections, tests with two of the three Hitachi tubes, and the construction of the liquid test facility were completed. In short, the minimum objectives were, for the most part, accomplished satisfactorily. 6 refs., 10 figs., 1 tab.

Obot, N.T.; Esen, E.B.

1990-12-01T23:59:59.000Z

327

Young modulus dependence of nanoscopic friction coefficient in hard coatings  

E-Print Network (OSTI)

with miniature moving parts, such as micro- electromechanical systems and hard-disk drives.1,2 A betterYoung modulus dependence of nanoscopic friction coefficient in hard coatings Elisa Riedoa with varying hardness obtained by different growth temperatures. For the CrN films, we show that the changes

Brune, Harald

328

Friction stir method for forming structures and materials  

DOE Patents (OSTI)

Processes for forming an enhanced material or structure are disclosed. The structure typically includes a preform that has a first common surface and a recess below the first common surface. A filler is added to the recess and seams are friction stir welded, and materials may be stir mixed.

Feng, Zhili (Knoxville, TN); David, Stan A. (Knoxville, TN); Frederick, David Alan (Harriman, TN)

2011-11-22T23:59:59.000Z

329

TEMPORARILY ALLOYING TITANIUM TO FACILITATE FRICTION STIR WELDING  

DOE Green Energy (OSTI)

While historically hydrogen has been considered an impurity in titanium, when used as a temporary alloying agent it promotes beneficial changes to material properties that increase the hot-workability of the metal. This technique known as thermohydrogen processing was used to temporarily alloy hydrogen with commercially pure titanium sheet as a means of facilitating the friction stir welding process. Specific alloying parameters were developed to increase the overall hydrogen content of the titanium sheet ranging from commercially pure to 30 atomic percent. Each sheet was evaluated to determine the effect of the hydrogen content on process loads and tool deformation during the plunge phase of the friction stir welding process. Two materials, H-13 tool steel and pure tungsten, were used to fabricate friction stir welding tools that were plunged into each of the thermohydrogen processed titanium sheets. Tool wear was characterized and variations in machine loads were quantified for each tool material and weld metal combination. Thermohydrogen processing was shown to beneficially lower plunge forces and stabilize machine torques at specific hydrogen concentrations. The resulting effects of hydrogen addition to titanium metal undergoing the friction stir welding process are compared with modifications in titanium properties documented in modern literature. Such comparative analysis is used to explain the variance in resulting process loads as a function of the initial hydrogen concentration of the titanium.

Hovanski, Yuri

2009-05-06T23:59:59.000Z

330

Modeling of friction-induced deformation and microstructures.  

SciTech Connect

Frictional contact results in surface and subsurface damage that could influence the performance, aging, and reliability of moving mechanical assemblies. Changes in surface roughness, hardness, grain size and texture often occur during the initial run-in period, resulting in the evolution of subsurface layers with characteristic microstructural features that are different from those of the bulk. The objective of this LDRD funded research was to model friction-induced microstructures. In order to accomplish this objective, novel experimental techniques were developed to make friction measurements on single crystal surfaces along specific crystallographic surfaces. Focused ion beam techniques were used to prepare cross-sections of wear scars, and electron backscattered diffraction (EBSD) and TEM to understand the deformation, orientation changes, and recrystallization that are associated with sliding wear. The extent of subsurface deformation and the coefficient of friction were strongly dependent on the crystal orientation. These experimental observations and insights were used to develop and validate phenomenological models. A phenomenological model was developed to elucidate the relationships between deformation, microstructure formation, and friction during wear. The contact mechanics problem was described by well-known mathematical solutions for the stresses during sliding friction. Crystal plasticity theory was used to describe the evolution of dislocation content in the worn material, which in turn provided an estimate of the characteristic microstructural feature size as a function of the imposed strain. An analysis of grain boundary sliding in ultra-fine-grained material provided a mechanism for lubrication, and model predictions of the contribution of grain boundary sliding (relative to plastic deformation) to lubrication were in good qualitative agreement with experimental evidence. A nanomechanics-based approach has been developed for characterizing the mechanical response of wear surfaces. Coatings are often required to mitigate friction and wear. Amongst other factors, plastic deformation of the substrate determines the coating-substrate interface reliability. Finite element modeling has been applied to predict the plastic deformation for the specific case of diamond-like carbon (DLC) coated Ni alloy substrates.

Michael, Joseph Richard; Prasad, Somuri V.; Jungk, John Michael; Cordill, Megan J. (University of Minnesota); Bammann, Douglas J.; Battaile, Corbett Chandler; Moody, Neville Reid; Majumdar, Bhaskar Sinha (New Mexico Institure of Mining and Technology)

2006-12-01T23:59:59.000Z

331

1990 INTERNATIONAL COMPRESSOR ENGINEERING CONFERENCE-ATPURDUE  

E-Print Network (OSTI)

heat exchanger, as shown in Figure 1, with refrigerant flowing through the inner tube of diameter d discharge pressure pulsations in refrigeration systems. In each of these studies, however, the condenser a transfer matrix model of variable cross- sectional area from solutions for the steady-state heat transfer

Singh, Rajendra

332

Enter the International Science and Engineering Visualization ...  

Science Conference Proceedings (OSTI)

Aug 3, 2013 ... Judges appointed by NSF and Science will select winners in five categories: Photography, Illustration, Posters and Graphics, Games and Apps, ...

333

Solar and seasonal dependence of ion frictional heating  

E-Print Network (OSTI)

Abstract. Ion frictional heating constitutes one of the principal mechanisms whereby energy, originating in the solar wind, is deposited into the Earth's ionosphere and ultimately the neutral atmosphere. Common programme observations by the EISCAT UHF radar system, spanning the years 1984 to 1995, provide the basis for a comprehensive statistical study of ion frictional heating, results of which are documented in this and a previous paper by the authors. In the present work, the authors demonstrate the solar and seasonal dependence of the universal time distribution of frictional heating, and explain these results with reference to corresponding dependences of the ion velocity. Although EISCAT observes a signi®cant increase in the occurrence of enhanced ion velocities associated with increased solar activity, the latter characterised according to the prevailing 10.7 cm solar ¯ux, this is not re¯ected to such an extent in the occurrence of frictional heating. It is suggested that this is a consequence of the decreased neutral atmosphere response times associated with active solar conditions, resulting from the higher ionospheric plasma densities present. Seasonal e€ects on the diurnal distribution of ion frictional heating are well explained by corresponding variations in ionospheric convection, the latter principally a result of geometrical factors. It is noted that, over the entire dataset, the variations in the unperturbed F-region ion temperature, required to implement the identi®cation criterion for ion heating, are highly correlated with model values of thermospheric temperature. Key words. Ionosphere (auroral ionosphere; ionosphere-atmosphere interactions; plasma temperature and density). 1

J. A. Davies; M. Lester; I. W. Mccrea

1999-01-01T23:59:59.000Z

334

Design and development of eco-friendly alcohol engine fitted with waste heat recovery system  

Science Conference Proceedings (OSTI)

The present paper discusses the design and development of an eco-friendly alcohol engine fitted with the waste heat recovery system as a remedial alternative to the existing commonly used internal combustion engine. With the present trends in Internal ...

G. Vijayan Iyer; Nikos E. Mastorakis

2006-06-01T23:59:59.000Z

335

Free-piston engine  

DOE Patents (OSTI)

A combustion system which can utilize high compression ratios, short burn durations, and homogeneous fuel/air mixtures in conjunction with low equivalence ratios. In particular, a free-piston, two-stroke autoignition internal combustion engine including an electrical generator having a linear alternator with a double-ended free piston that oscillates inside a closed cylinder is provided. Fuel and air are introduced in a two-stroke cycle fashion on each end, where the cylinder charge is compressed to the point of autoignition without spark plugs. The piston is driven in an oscillating motion as combustion occurs successively on each end. This leads to rapid combustion at almost constant volume for any fuel/air equivalence ratio mixture at very high compression ratios. The engine is characterized by high thermal efficiency and low NO.sub.x emissions. The engine is particularly suited for generating electrical current in a hybrid automobile.

Van Blarigan, Peter (Truckee, CA)

2001-01-01T23:59:59.000Z

336

Fuel effects in homogeneous charge compression ignition (HCCI) engines  

E-Print Network (OSTI)

Homogenous-charge, compression-ignition (HCCI) combustion is a new method of burning fuel in internal combustion (IC) engines. In an HCCI engine, the fuel and air are premixed prior to combustion, like in a spark-ignition ...

Angelos, John P. (John Phillip)

2009-01-01T23:59:59.000Z

337

Efficiency Improvement through Reduction in Friction and Wear in Powertrain Systems  

DOE Green Energy (OSTI)

The objective of this project is to improve the efficiency of truck drivelines through reduction of friction and parasitic losses in transmission and drive axles. Known efficiencies for these products exceeded 97 percent, so the task was not trivial. The project relied on a working relationship between modeling and hardware testing. Modeling was to shorten the development cycle by guiding the selection of materials, processes and strategies. Bench top and fixture tests were to validate the models. Modeling was performed at a world class, high academic level, but in the end, modeling did not impact the hardware development as much as intended. Insights leading to the most significant accomplishments came from bench top and fixture tests and full scale dynamometer tests. A key development in the project was the formulation of the implementation strategy. Five technical elements with potential to minimize friction and parasitic losses were identified. These elements included churning, lubrication, surface roughness, coatings and textures. An interesting fact is that both Caterpillar and Eaton independently converged on the same set of technical elements in formulating their implementation strategies. Exploiting technical elements of the implementation strategy had a positive impact on transmission and drive axle efficiencies. During one dynamometer test of an Eaton Best Tech 1 transmission, all three gear ranges tested: Under drive, direct drive and over drive, showed efficiencies greater than 99 percent. Technology boosts to efficiency for transmissions reached 1 percent, while efficiency improvements to drive axle pushed 2 percent. These advancements seem small, but the accomplishment is large considering that these products normally run at greater than 97 percent efficiency. Barriers and risks to implementing these technology elements are clear. Schemes using a low fill sump and spray tubes endanger the gears and bearings by lubricant starvation. Gear coatings have exhibited durability issues, stripping away under conditions less demanding than 750,000 miles in service on the road. Failed coatings compound the problem by contaminating the lubricant with hard particles. Under the most severe conditions, super finished surfaces may polish further, reaching a surface roughness unable to support the critical oil film thickness. Low viscosity and low friction lubricants may not protect the gears and bearings adequately leading to excessive pitting, wear and noise. Additives in low friction oils may not stay in solution or suspended thus settling to the bottom and unavailable when they are needed most. Technical barriers and risks can be overcome through engineering, but two barriers remain formidable: (1) cost of the technology and (2) convincing fleet owners that the technology provides a tangible benefit. Dry sumps lower lubricant operating temperatures so the removal of heat exchangers and hoses and reduced demand on engine cooling systems justify their use. The benefits of surface texturing are varied and remain unproven. Lubricant costs seem manageable, but the cost of super finishing and gear coating are high. These are issues of scale and processing technology. Going across the board with gear super finishing and coating will reduce costs. Pushing the envelope to applications with higher torque and higher power density should drive the adoption of these technologies. Fleet owners are an educated and seasoned lot. Only technology measureable in dollars returned is used on truck fleets. To convince fleet owners of the benefit of these technologies, new precision in measuring fuel efficiency must be introduced. Legislation for a minimum standard in truck miles per gallon would also enable the use of these technologies. Improving the efficiency of truck transmissions and axle will make a noticeable impact on the fuel consumption by heavy vehicles in the United States. However, the greatest benefit will come when all the individual efficiency technologies like hybrid power, aerodynamic fairings, auxiliary power units, super

Michael Killian

2009-09-30T23:59:59.000Z

338

Information engineering  

SciTech Connect

The Information Engineering thrust area develops information technology to support the programmatic needs of Lawrence Livermore National Laboratory`s Engineering Directorate. Progress in five programmatic areas are described in separate reports contained herein. These are entitled Three-dimensional Object Creation, Manipulation, and Transport, Zephyr:A Secure Internet-Based Process to Streamline Engineering Procurements, Subcarrier Multiplexing: Optical Network Demonstrations, Parallel Optical Interconnect Technology Demonstration, and Intelligent Automation Architecture.

Hunt, D.N.

1997-02-01T23:59:59.000Z

339

NREL: Wind Research - International Research Collaboratives  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Collaboratives Research Collaboratives Researchers at the National Wind Technology Center (NWTC) leverage U.S. research dollars by participating in multi-lateral research collaborations with many international organizations. NWTC collaborates with several of the world's most respected institutions, including the national research institutions of other countries. NREL also works through international agencies dedicated to the common interests of energy research and applications such as the International Energy Agency (IEA), the International Electrotechnical Commission (IEC), the Institute of Electrical and Electronics Engineers (IEEE), Underwriters Laboratory, and the International Measuring Network of Wind Energy Institutes (MEASNET). International Energy Agency NREL supports international research efforts through its participation in

340

General Engineers  

U.S. Energy Information Administration (EIA) Indexed Site

General Engineers General Engineers The U.S. Energy Information Administration (EIA) within the Department of Energy has forged a world-class information program that stresses quality, teamwork, and employee growth. In support of our program, we offer a variety of profes- sional positions, including the General Engineer, whose work is associated with analytical studies and evaluation projects pertaining to the operations of the energy industry. Responsibilities: General Engineers perform or participate in one or more of the following important functions: * Design modeling systems to represent energy markets and the physical properties of energy industries * Conceive, initiate, monitor and/or conduct planning and evaluation projects and studies of continuing and future

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

CHEMICAL ENGINEERING AND MANUFACTURING CHEMICAL ENGINEERING  

E-Print Network (OSTI)

CHEMICAL ENGINEERING AND MANUFACTURING CHEMICAL ENGINEERING Objective Chemical Engineers of chemicals. This lesson introduces students to one component of chemical engineering: food processing, and a chemical engineer 2. How chemical engineers are involved in food production 3. That chemical engineers need

Provancher, William

342

Web engineering  

Science Conference Proceedings (OSTI)

Web Engineering is the application of systematic, disciplined and quantifiable approaches to development, operation, and maintenance of Web-based applications. It is both a pro-active approach and a growing collection of theoretical and empirical research ... Keywords: development methodologies, taxonomy of Web applications, web Engineering, web application development, web-based information systems

Yogesh Deshpande; San Murugesan; Athula Ginige; Steve Hansen; Daniel Schwabe; Martin Gaedke; Bebo White

2002-10-01T23:59:59.000Z

343

The 2nd International Symposium on Lithium Applications for Fusion...  

NLE Websites -- All DOE Office Websites (Extended Search)

Princeton, New Jersey, USA The 2nd International Symposium on Lithium Applications for Fusion devices The purpose of this symposium is to bring together scientists and engineers...

344

Friction-induced Resonance of a Stochastic Oscillator  

Science Conference Proceedings (OSTI)

The influence of the friction coefficient on the long-time behavior of the output signal of a harmonic oscillator with fluctuating frequency subjected to an external periodic force and an additive thermal noise is considered. The colored fluctuations of the oscillator frequency are modeled as a three-level Markovian telegraph noise. The main purpose of this work is to demonstrate, based on exact expressions, that the resonance is manifested in the dependence of the response function and the complex susceptibility of the oscillator upon the friction coefficient. The advantage of the latter effect is that the control parameter is the damping coefficient, which can easily be varied in possible experiments as well as potential technological applications.

Laas, K.; Mankin, R. [Institute of Mathematics and Natural Sciences, Tallinn University 25 Narva Road, 10120 Tallinn (Estonia)

2009-10-29T23:59:59.000Z

345

Friction Factor Measurements in an Equally Spaced Triangular Tube Array  

SciTech Connect

Friction factor data for adiabatic cross-flow of water in a staggered tube array was obtained over a Reynolds number range (based on hydraulic diameter and gap velocity) of about 10,000 to 250,000. The tubes were 12.7mm (0.5 inch) outer diameter, in a uniformly spaced triangular arrangement with a pitch-to-diameter ratio of 1.5. The friction factor was compared to several literature correlations, and was found to be best matched by the Idelchik correlation. Other correlations were found to vary significantly from the test data. Based on the test data, a new correlation is proposed for this tube bundle geometry which covers the entire Reynolds number range tested.

Vassallo P, Symolon P

2007-03-19T23:59:59.000Z

346

Friction Stir Spot Welding of DP780 Carbon Steel  

Science Conference Proceedings (OSTI)

Friction stir spot welds were made in uncoated and galvannneled DP780 sheets using polycrystalline boron nitride stir tools. The tools were plunged at either a single continuous rate or in two segments consisting of a relatively high rate followed by a slower rate of shorter depth. Welding times ranged from 1-10 s. Increasing tool rotation speed from 800 to 1600 rpm increased strength values. The 2-segment welding procedures also produced higher strength joints. Average lap-shear strengths exceeding 10.3 kN were consistently obtained in 4 s on both the uncoated and the galvannealed DP780. The likelihood of diffusion and mechanical interlocking contributing to bond formation was supported by metallographic examinations. A cost analysis based on spot welding in automobile assembly showed that for friction stir spot welding to be economically competitive with resistance spot welding the cost of stir tools must approach that of resistance spot welding electrode tips.

Santella, M. L.; Hovanski, Yuri; Frederick, Alan; Grant, Glenn J.; Dahl, Michael E.

2009-09-15T23:59:59.000Z

347

Micro-beam friction liner and method of transferring energy  

SciTech Connect

A micro-beam friction liner adapted to increase performance and efficiency and reduce wear in a piezoelectric motor or actuator or other device using a traveling or standing wave to transfer energy in the form of torque and momentum. The micro-beam friction liner comprises a dense array of micro-beam projections having first ends fixed relative to a rotor and second ends projecting substantially toward a plurality of teeth of a stator, wherein the micro-beam projections are compressed and bent during piezoelectric movement of the stator teeth, thereby storing the energy, and then react against the stator teeth to convert the stored energy stored to rotational energy in the rotor.

Mentesana, Charles (Leawood, KS)

2007-07-17T23:59:59.000Z

348

Rack-and-pinion effects in molecular rolling friction  

E-Print Network (OSTI)

Rolling lubrication with spherical molecules working as 'nanobearings' has failed experimentally so far, without a full understanding of the physics involved and of the reasons why. Past model simulations and common sense have shown that molecules can only roll when they are not too closely packed to jam. The same type of model simulations now shows in addition that molecular rolling friction can develop deep minima once the molecule's peripheral 'pitch' can match the substrate periodicity, much as ordinary cogwheels do in a rack-and-pinion system. When the pinion-rack matching is bad, the driven molecular rolling becomes discontinuous and noisy, whence energy is dissipated and friction is large. This suggests experiments to be conducted by varying the rack-and-pinion matching. That could be pursued not only by changing molecules and substrates, but also by applying different sliding directions within the same system, or by applying pressure, to change the effective matching.

Oleg M. Braun; Erio Tosatti

2008-09-05T23:59:59.000Z

349

NEWTON's Engineering References  

NLE Websites -- All DOE Office Websites (Extended Search)

engineering content for K-12 teachers. There are activities, lessons, and curriculum designed to introduce your students to engineering. ENGINEERING.com ENGINEERING.com...

350

College of Engineering Profile The College of Engineering at Colorado  

E-Print Network (OSTI)

College of Engineering Profile 2007-2008 The College of Engineering at Colorado State has a strong and Biological Engineering Civil and Environmental Engineering Electrical and Computer Engineering Mechanical Programs: Chemical and Biological Engineering Civil Engineering Computer Engineering Electrical Engineering

351

Solid Friction from stick-slip to pinning and aging  

E-Print Network (OSTI)

We review the present state of understanding of solid friction at low velocities and for systems with negligibly small wear effects. We first analyze in detail the behavior of friction at interfaces between wacroscopic hard rough solids, whose main dynamical features are well described by the Rice-Ruina rate and state dependent constitutive law. We show that it results from two combined effects : (i) the threshold rheology of nanometer-thick junctions jammed under confinement into a soft glassy structure (ii) geometric aging, i.e. slow growth of the real arrea of contact via asperity creep interrupted by sliding. Closer analysis leads to identifying a second aging-rejuvenation process, at work within the junctions themselves. We compare the effects of structural aging at such multicontact, very highly confined, interfaces with those met under different confinement levels, namely boundary lubricated contacts and extended adhesive interfaces involving soft materials (hydrogels, elastomers). This leads us to propose a classification of frictional junctions in terms of the relative importance of jamming and adsoprtion-induced metastability.

Tristan Baumberger; Christiane Caroli

2005-06-24T23:59:59.000Z

352

Determination of Friction Coefficient in Unconfined Compression of Brain Tissue  

E-Print Network (OSTI)

Unconfined compression tests are more convenient to perform on cylindrical samples of brain tissue than tensile tests in order to estimate mechanical properties of the brain tissue because they allow for homogeneous deformations. The reliability of these tests depends significantly on the amount of friction generated at the specimen/platen interface. Thus, there is a crucial need to find an approximate value of the friction coefficient in order to predict a possible overestimation of stresses during unconfined compression tests. In this study, a combined experimental-computational approach was adopted to estimate the dynamic friction coefficient mu of porcine brain matter against metal platens in compressive tests. Cylindrical samples of porcine brain tissue were tested up to 30% strain at variable strain rates, both under bonded and lubricated conditions in the same controlled environment. It was established that mu was equal to 0.09 +/- 0.03, 0.18 +/- 0.04, 0.18 +/- 0.04 and 0.20 +/- 0.02 at strain rates of...

Rashid, Badar; Gilchrist, Michael; 10.1016/j.jmbbm.2012.05.001

2013-01-01T23:59:59.000Z

353

Adiabatic two-phase frictional pressure drops in microchannels  

SciTech Connect

Two-phase pressure drops were measured over a wide range of experimental test conditions in two sizes of microchannels (sight glass tubes 0.509 and 0.790 mm) for two refrigerants (R-134a and R-245fa). Similar to the classic Moody diagram in single-phase flow, three zones were distinguishable when plotting the variation of the two-phase friction factor versus the two-phase Reynolds number: a laminar regime for Re{sub TP} < 2000, a transition regime for 2000 {<=} Re{sub TP} < 8000 and a turbulent regime for Re{sub TP} {>=} 8000. The laminar zone yields a much sharper gradient than in single-phase flow. The transition regime is not predicted well by any of the prediction methods for two-phase frictional pressure drops available in the literature. This is not unexpected since only a few data are available for this region in the literature and most methods ignore this regime, jumping directly from laminar to turbulent flow at Re{sub TP} = 2000. The turbulent zone is best predicted by the Mueller-Steinhagen and Heck correlation. Also, a new homogeneous two-phase frictional pressure drop has been proposed here with a limited range of application. (author)

Revellin, Remi; Thome, John R. [EPFL, STI ISE LTCM, ME Gl 464, Station 9, CH-1015 Lausanne (Switzerland)

2007-07-15T23:59:59.000Z

354

Argonne Chemical Sciences & Engineering - 2005 Awards  

NLE Websites -- All DOE Office Websites (Extended Search)

5 Awards 5 Awards 2005 Outstanding Engineering Achievement, Illinois Engineering Council, awarded to Argonne National Laboratory Chemical Engineering Division IBA Research Award, International Battery Materials Association, Christopher Johnson R&D 100 Award, Self-Contained Battery-Powered bion® Microstimulator with Rechargeable Miniature Battery, Khalil Amine, Ilias Belharouak, Bookeun Oh, Donald Vissers, Qingzheng Wang Electrochemical Society Battery Division Research Award, Electrochemical Society, Michael Thackeray Illinois Engineering Council Outstanding Engineering Achievement Award, UREX+ Process for Separating Key Radionuclides from Commercial Spent Fuel Innovation Hub Tribute to Innovative Minds, Michael Thackeray The University of Chicago Distinguished Performance Award, U of C, Julius Jellinek

355

Use of Friction Stir Welding and Friction Stir Processing for Advanced Nuclear Fuels and Materials Joining Applications  

SciTech Connect

Application of the latest developments in materials technology may greatly aid in the successful pursuit of next generation reactor and transmutation technologies. One such area where significant progress is needed is joining of advanced fuels and materials. Rotary friction welding, also referred to as friction stir welding (FSW), has shown great promise as a method for joining traditionally difficult to join materials such as aluminum alloys. This relatively new technology, first developed in 1991, has more recently been applied to higher melting temperature alloys such as steels, nickel-based and titanium alloys. An overview of the FSW technology is provided and two specific nuclear fuels and materials applications where the technique may be used to overcome limitations of conventional joining technologies are highlighted.

J. I. Cole; J. F. Jue

2006-06-01T23:59:59.000Z

356

Studies of dynamic contact of ceramics and alloys for advanced heat engines. Final report  

DOE Green Energy (OSTI)

Advanced materials and coatings for low heat rejection engines have been investigated for almost a decade. Much of the work has concentrated on the critical wear interface between the piston ring and cylinder liner. Simplified bench tests have identified families of coatings with high temperature wear performance that could meet or exceed that of conventional engine materials at today`s operating temperatures. More recently, engine manufacturers have begun to optimize material combinations and manufacturing processes so that the materials not only have promising friction and wear performance but are practical replacements for current materials from a materials and manufacturing cost standpoint. In this study, the advanced materials supplied by major diesel engine manufacturers were evaluated in an experimental apparatus that simulates many of the in-cylinder conditions of a low heat rejection diesel engine. Results include ring wear factors and average dynamic friction coefficients measured at intervals during the test. These results are compared with other advanced materials tested in the past as well as the baseline wear of current engines. Both fabricated specimens and sections of actual ring and cylinder liners were used in the testing. Observations and relative friction and wear performance of the individual materials are provided.

Gaydos, P.A.; Dufrane, K.F. [Battelle, Columbus, OH (United States)

1993-06-01T23:59:59.000Z

357

Matching pedagogical intent with engineering design process models for precollege education  

Science Conference Proceedings (OSTI)

Public perception of engineering recognizes its importance to national and international competitiveness, economy, quality of life, security, and other fundamental areas of impact; but uncertainty about engineering among the general public remains. Federal ... Keywords: Engineering Design Process, Primary Through Grade 12 Engineering, Science, Technology, Engineering, and Mathematics Education

Derrick Tate; John Chandler; A. dean Fontenot; Susan Talkmitt

2010-08-01T23:59:59.000Z

358

Harmonic engine  

Science Conference Proceedings (OSTI)

A high efficiency harmonic engine based on a resonantly reciprocating piston expander that extracts work from heat and pressurizes working fluid in a reciprocating piston compressor. The engine preferably includes harmonic oscillator valves capable of oscillating at a resonant frequency for controlling the flow of working fluid into and out of the expander, and also preferably includes a shunt line connecting an expansion chamber of the expander to a buffer chamber of the expander for minimizing pressure variations in the fluidic circuit of the engine. The engine is especially designed to operate with very high temperature input to the expander and very low temperature input to the compressor, to produce very high thermal conversion efficiency.

Bennett, Charles L. (Livermore, CA)

2009-10-20T23:59:59.000Z

359

Engineering Emergence  

Science Conference Proceedings (OSTI)

We explore various definitions and characteristics of emergence, how we might recognise and measure emergence, and how we might engineer emergent systems. We discuss the TUNA ("Theory Underpinning Nanotech Assemblers") project, which is investigating ...

Susan Stepney; Fiona A. C. Polack; Heather R. Turner

2006-08-01T23:59:59.000Z

360

Vehicle Technologies Office: Advanced Combustion Engines  

NLE Websites -- All DOE Office Websites (Extended Search)

Combustion Engines Combustion Engines Improving the efficiency of internal combustion engines is one of the most promising and cost-effective near- to mid-term approaches to increasing highway vehicles' fuel economy. The Vehicle Technologies Office's research and development activities address critical barriers to commercializing higher efficiency, very low emissions advanced internal combustion engines for passenger and commercial vehicles. This technology has great potential to reduce U.S. petroleum consumption, resulting in greater economic, environmental, and energy security. Already offering outstanding drivability and reliability to over 230 million passenger vehicles, internal combustion engines have the potential to become substantially more efficient. Initial results from laboratory engine tests indicate that passenger vehicle fuel economy can be improved by more than up to 50 percent, and some vehicle simulation models estimate potential improvements of up to 75 percent. Advanced combustion engines can utilize renewable fuels, and when combined with hybrid electric powertrains could have even further reductions in fuel consumption. As the EIA reference case forecasts that by 2035, more than 99 percent of light- and heavy-duty vehicles sold will still have internal combustion engines, the potential fuel savings is tremendous.

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Internal combustion electric power hybrid power plant  

SciTech Connect

An internal combustion-electric motor hybrid power plant for an automotive vehicle is disclosed. The power plant includes an internal combustion engine and a direct current electric motor generator which are connected to a drive shaft for the vehicle. A clutch mechanism is provided to connect the internal combustion engine, the direct current electric motor generator and the drive shaft for selectively engaging and disengaging the drive shaft with the internal combustion engine and the motor generator. A storage battery is electrically connected to the motor generator to supply current to and receive current therefrom. Thermoelectric semi-conductors are arranged to be heated by the waste heat of the internal combustion engine. These thermoelectric semi-conductors are electrically connected to the battery to supply current thereto. The thermoelectric semi-conductors are mounted in contact with the outer surfaces of the exhaust pipe of the internal combustion engine and also with the outer surfaces of the cylinder walls of the engine.

Cummings, T.A.

1979-04-10T23:59:59.000Z

362

PARTICIPATING AGENCY SERVICE AGREEMENT THE UNITED STATES AGENCY FOR INTERNATIONAL DEVELOPMENT  

E-Print Network (OSTI)

- 2 - PARTICIPATING AGENCY SERVICE AGREEMENT BETWEEN THE UNITED STATES AGENCY FOR INTERNATIONAL. Participating Agency 12B. United States Agency for International Name: L. Leonard Wolner, Interagency U.S. Army Corps of Engineers United States Agency for International Development Qlf

US Army Corps of Engineers

363

COMPUTER ENGINEERING EECS Department  

E-Print Network (OSTI)

COMPUTER ENGINEERING EECS Department The Electrical Engineering and Computer Science (EECS) Department at WSU offers undergraduate degrees in electrical engineering, computer engineering and computer science. The EECS Department offers Master of Science degrees in computer science, electrical engineering

364

Creep-Fatigue and Thermo-Mechanical Fatigue of Friction-Welded ...  

Science Conference Proceedings (OSTI)

Thus, this method is an attractive welding process for the joining of new generation nickel based superalloys. In addition, friction welding also provides the ability ...

365

Establishing W-Based Friction Stir Welding Tool Life for Thick ...  

Science Conference Proceedings (OSTI)

Over 135 feet of weld length was achieved with a single W-based tool and the ultimate tensile strength throughout ... Friction Stir Welding of Pipeline Steels.

366

The Effect of Friction Stir Processing and Subsequent Rolling on the ...  

Science Conference Proceedings (OSTI)

fan arrangements of Al3Zr particles, triggered by enhanced grain boundary migration due ... the deformation during friction stirring, the fan arrangements of Al3Zr ...

367

Internal Communication  

NLE Websites -- All DOE Office Websites (Extended Search)

9 Internal Communication Process 11_0303 Page 1 of 6 9 Internal Communication Process 11_0303 Page 1 of 6 EOTA - Business Process Document Title: Internal Communication Process Document Number: P-009 Rev 11_0303 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001 Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): N/A P-009 Internal Communication Process 11_0303 Page 2 of 6 Revision History: Rev. Description of Change A Initial Release 09_0902 Modified process to better fit current practice. 10_0831 Added verbiage to clarify process. Added initiation phrase to process steps. 11_0303 Added QAM to the last step and made minor editorial updates. P-009 Internal Communication Process 11_0303 Page 3 of 6 I. Purpose

368

Friction stir welding tool and process for welding dissimilar materials  

SciTech Connect

A friction stir welding tool and process for lap welding dissimilar materials are detailed. The invention includes a cutter scribe that penetrates and extrudes a first material of a lap weld stack to a preselected depth and further cuts a second material to provide a beneficial geometry defined by a plurality of mechanically interlocking features. The tool backfills the interlocking features generating a lap weld across the length of the interface between the dissimilar materials that enhances the shear strength of the lap weld.

Hovanski, Yuri; Grant, Glenn J; Jana, Saumyadeep; Mattlin, Karl F

2013-05-07T23:59:59.000Z

369

Investigation of the viability and cost effectiveness of solid fuel gasifiers close coupled to internal combustion engines for 200 kWe power generation. Technical progress report No. 9  

DOE Green Energy (OSTI)

The viability and cost effectiveness of a 200 kWe engine generator unit fueled by a direct coupled, solid fuel gasifier were studied. Recent literature describing gasifier technology was obtained and personal visits were made to test facility sites and engine manufacturing plants to discuss the subject with researchers and engineers. Two prototype units were inspected, one of which was in partial operation. This report presents a brief discussion of fuel and gasifier technology, gas treatment (clean up) for engine use, engine use technology, other uses for gasifiers, the viability of close coupled units, and an estimate of cost effectiveness. Present small experimental gasifier systems perform as expected and have served to demonstrate the technology. Typically they operate with fuel species which are present and collected on the site of a processing plant. Certain needed development efforts are discussed. Also, fuel must be available at low cost and even then electric power produced in this way is unlikely to be competitive economically where utility poles are available. (LTN)

Mingle, J. G.; Junge, D. C.

1979-01-01T23:59:59.000Z

370

Proceedings of the 1987 coatings for advanced heat engines workshop  

DOE Green Energy (OSTI)

This Workshop was conducted to enhance communication among those involved in coating development for improved heat engine performance and durability. We were fortunate to have Bill Goward review the steady progress and problems encountered along the way in the use of thermal barrier coatings (TBC) in aircraft gas turbine engines. Navy contractors discussed their work toward the elusive goal of qualifying TBC for turbine airfoil applications. In the diesel community, Caterpillar and Cummins are developing TBC for combustion chamber components as part of the low heat rejection diesel engine concept. The diesel engine TBC work is based on gas turbine technology with a goal of more than twice the thickness used on gas turbine engine components. Adoption of TBC in production for diesel engines could justify a new generation of plasma spray coating equipment. Increasing interests in tribology were evident in this Workshop. Coatings have a significant role in reducing friction and wear under greater mechanical loadings at higher temperatures. The emergence of a high temperature synthetic lubricant could have an enormous impact on diesel engine design and operating conditions. The proven coating processes such as plasma spray, electron-beam physical vapor deposition, sputtering, and chemical vapor deposition have shown enhanced capabilities, particularly with microprocessor controls. Also, the newer coating schemes such as ion implantation and cathodic arc are demonstrating intriguing potential for engine applications. Coatings will play an expanding role in higher efficiency, more durable heat engines.

Not Available

1987-01-01T23:59:59.000Z

371

Identification and compensation of friction for a dual stage positioning system  

E-Print Network (OSTI)

Motion control systems are usually designed to track trajectories and/or regulate about a desired point. Most of the other objectives, like minimizing the tracking time or minimizing the energy expended, are secondary which quantify the above described objectives. The control problem in hard disk drives is tracking and seeking the desired tracks. Recent increase in the storage capacity demands higher accuracy of the read/write head. Dual stage actuators as compared to conventional single actuator increases the accuracy of the read/write head in hard disk drives. A scaled up version of the dual stage actuator is considered as the test bed for this thesis. Friction is present in all electromechanical systems. This thesis deals with modelling of the dual stage actuator test bed. A linear model predicts the behavior of the ?ne stage. Friction is signi?cant in the coarse stage. Considerable time has been spent to model the coarse stage as a friction based model. Initially, static friction models were considered to model the friction. Dynamic models, which describe friction better when crossing zero velocity were considered. By analyzing several experimental data it was concluded that the friction was dependent on position and velocity as compared to conventional friction models which are dependent on the direction of motion. Static and Coulomb friction were modelled as functions of velocity and position. This model was able to predict the behavior of the coarse stage satisfactorily for various initial conditions. A friction compensation scheme based on the modelled friction is used to linearize the system based on feedback linearization techniques.

Thimmalapura, Satish Voddina

2004-08-01T23:59:59.000Z

372

Business Engineering (B.Sc.) Summer Term 2013  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 Internal Combustion Engines and Exhaust Gas Aftertreatment Technology- 2134138Business Engineering (B.Sc.) Summer Term 2013 Long version Date: 05.03.2013 Faculty of Economics and Business Engineering KIT - University of the State of Baden-Wuerttemberg and National Research Center

Stein, Oliver

373

Economics Engineering (M.Sc.) Summer Term 2013  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 Internal Combustion Engines and Exhaust Gas Aftertreatment Technology- 2134138Economics Engineering (M.Sc.) Summer Term 2013 Long version Date: 05.03.2013 Faculty of Economics and Business Engineering KIT - University of the State of Baden-Wuerttemberg and National Research Center

Stein, Oliver

374

Economics Engineering (B.Sc.) Summer Term 2013  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 Internal Combustion Engines and Exhaust Gas Aftertreatment Technology- 2134138Economics Engineering (B.Sc.) Summer Term 2013 Long version Date: 06.03.2013 Department of Economics and Business Engineering KIT - University of the State of Baden-Wuerttemberg and National Research

Stein, Oliver

375

Systems Engineering -MENG Post Graduate Activities Detail & History  

E-Print Network (OSTI)

as an international student2008 Graduate and Professional Schools Employer Title City State/Country Amazon.com Software Engineer Seattle NY Apple Software Engineer Cupertino CA BAE Systems Software Eng. Wayne NJ Citi Surface Warfare Officer (Nuclear) Boston MA VSEA Electrical Systems Engineer II Boston MA www

Lipson, Michal

376

Identification of tribological research and development needs for lubrication of advanced heat engines  

DOE Green Energy (OSTI)

The continuous evolution of higher power density propulsion systems has always fueled the search for materials and lubricants with improved thermal and/or durability characteristics. Tribology of the upper cylinder region is the major technology roadblock in the path of the adiabatic diesel engine which has an energy reduction potential that exceeds that of all other engine development types. This tribology assessment resulted in the following major conclusions: a low friction and a low wear seal between the ring belt and cylinder bore are the most critical tribology functions in the diesel combustion chamber; development of solid lubrication systems will not satisfy the simultaneous low friction and low wear requirements in the upper cylinder area; development of separate upper cylinder liquid lubrication systems offers the most attractive design alternative for meeting the operational goals of future ''minimum cooled'' diesel engines.

Fehrenbacher, L.L.; Levinson, T.M.

1985-09-01T23:59:59.000Z

377

Numerical tests of dynamical friction in gravitational inhomogeneous systems  

E-Print Network (OSTI)

In this paper, I test by numerical simulations the results of Del Popolo & Gambera (1998),dealing with the extension of Chandrasekhar and von Neumann's analysis of the statistics of the gravitational field to systems in which particles (e.g., stars, galaxies) are inhomogeneously distributed. The paper is an extension of that of Ahmad & Cohen (1974), in which the authors tested some results of the stochastic theory of dynamical friction developed by Chandrasekhar & von Neumann (1943) in the case of homogeneous gravitational systems. It is also a continuation of the work developed in Del Popolo (1996a,b), which extended the results of Ahmad & Cohen (1973), (dealing with the study of the probability distribution of the stochastic force in homogeneous gravitational systems) to inhomogeneous gravitational systems. Similarly to what was done by Ahmad & Cohen (1974) in the case of homogeneous systems, I test, by means of the evolution of an inhomogeneous system of particles, that the theoretical rate of force fluctuation d F/dt describes correctly the experimental one, I find that the stochastic force distribution obtained for the evolved system is in good agreement with the Del Popolo & Gambera (1998) theory. Moreover, in an inhomogeneous background the friction force is actually enhanced relative to the homogeneous case.

A. Del Popolo

2003-05-05T23:59:59.000Z

378

Friction Stir Spot Welding of DP780 Carbon Steel  

Science Conference Proceedings (OSTI)

Friction stir spot welds were made in uncoated and galvannealed DP780 sheets using polycrystalline boron nitride stir tools. The tools were plunged at either a single continuous rate or in two segments consisting of a relatively high rate followed by a slower rate of shorter depth. Welding times ranged from 1 to 10 s. Increasing tool rotation speed from 800 to 1600 rev min{sup -1} increased strength values. The 2-segment welding procedures also produced higher strength joints. Average lap shear strengths exceeding 10 {center_dot} 3 kN were consistently obtained in 4 s on both the uncoated and the galvannealed DP780. The likelihood of diffusion and mechanical interlocking contributing to bond formation was supported by metallographic examinations. A cost analysis based on spot welding in automobile assembly showed that for friction stir spot welding to be economically competitive with resistance spot welding the cost of stir tools must approach that of resistance spot welding electrode tips.

Santella, Michael L [ORNL; Hovanski, Yuri [ORNL; Frederick, David Alan [ORNL; Grant, Glenn J [ORNL; Dahl, Michael E [ORNL

2010-01-01T23:59:59.000Z

379

Preliminary Notice of Violation, Washington Group International -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Group International - Group International - EA-2003-07 Preliminary Notice of Violation, Washington Group International - EA-2003-07 October 23, 2003 Preliminary Notice of Violation issued to Washington Group International related to Falsification of Records and Procurement Deficiencies at the Advanced Mixed Waste Treatment Project at the Idaho National Engineering and Environmental Laboratory This letter refers to the investigation conducted by the Department of Energy (DOE) into allegations that RTS Wright Industries, LLC, (RTS), a supplier for which Washington Group International (WGI) had direct contractual responsibility, had falsified quality control inspection records. These records pertained to the Advanced Mixed Waste Treatment Project (AMWTP) Supercompactor Glovebox Suite at the Idaho

380

Engineering salary trends in the petroleum industry  

Science Conference Proceedings (OSTI)

To understand the changes that occur cyclically in engineering manpower supply/demand trends in the petroleum industry, it is desirable to have an awareness of some of the major activities and factors affecting such trends; of starting Petroleum Engineering salaries relating to that background; of the on-going engineering salary status which developed from these activities; and of the large effect that high starting and on-going salaries do have in attracting and retaining engineers within the petroleum industry. It is important to realize that changes in industry trends can be brought about both by economic and political decisions, in both domestic and international activities.

Brown, D.C.; Terrant, L.E.

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Vibrational energy transfer in a diesel engine  

Science Conference Proceedings (OSTI)

The paths of vibrational energy transfer in a diesel engine were investigated in order to obtain insight into ways of reducing this transfer to the exterior surfaces and thereby reduce the radiated noise. The engine was tested in a nonrunning condition with simulated internal forces in order to study the different transfer paths separately. Vibration response measurements were made of individual engine components and lumped?parameter models were developed to simulate this response. These models were then used to determine component design changes that would reduce the energy transfer. Two design changes were implemented in the engine and a reduction of the energy transfer was achieved as predicted.

R. G. DeJong; R. H. Lyon

1977-01-01T23:59:59.000Z

382

Past experiences with automotive external combustion engines  

SciTech Connect

GMR (General Motors Research Laboratories, now GM R and D Center) has a history of improving the internal combustion engine, especially as it relates to automotive use. During the quarter century from 1950--75, considerable effort was devoted to evaluating alternative powerplants based on thermodynamic cycles different from those on which the established spark-ignition and diesel engines are founded. Two of these, the steam engine and the Stirling engine, incorporated external combustion. Research on those two alternatives is reviewed. Both were judged to fall short of current needs for commercial success as prime movers for conventional automotive vehicles.

Amann, C.A.

1999-07-01T23:59:59.000Z

383

Greenpeace International  

E-Print Network (OSTI)

report 2 nd edition 2011 japan energy scenario“will we look into the eyes of our children and confess that we had the opportunity, but lacked the courage? that we had the technology, but lacked the vision?” Greenpeace International,

Energy Council; Erec Arthouros Zervos; Sven Teske; Junichi Sato; Hisayo Takada; Image Rice Fields In Kamikatsu; Wolfram Krewitt Dr. Thomas; Sydney Jay Rutovitz; Nicky Ison; Iida Hironao Matsubara

2011-01-01T23:59:59.000Z

384

Reliable solution of an unilateral contact problem with friction and uncertain data in thermo-elasticity  

Science Conference Proceedings (OSTI)

An unilateral contact problem with friction and with uncertain input data in quasi-coupled thermo-elasticity is analysed. As uncertain data coefficients of stress-strain law, coefficients of thermal conductivity, body and surface forces, thermal sources ... Keywords: Coulomb friction, finite element analysis, radioactive waste repositories, steady-state heat flow, unilateral contact

I. Hlavá?ek; J. Nedoma

2005-01-01T23:59:59.000Z

385

Linear Instability with Ekman and Interior Friction. Part II: Initial Value Analysis  

Science Conference Proceedings (OSTI)

Normal-mode and nonmodal growth are investigated using initial value models. The initial value problems for the Eady and a generalized Eady model (the G model) are solved with no friction and with both Ekman and interior friction. The nonmodel ...

Richard Grotjahn; Roderick Pedersen; Joseph Tribbia

1995-03-01T23:59:59.000Z

386

Sensitivity of the Latitude of the Surface Westerlies to Surface Friction  

Science Conference Proceedings (OSTI)

The sensitivity to surface friction of the latitude of the surface westerlies and the associated eddy-driven midlatitude jet is studied in an idealized dry GCM. The westerlies move poleward as the friction is reduced in strength. An increase in ...

Gang Chen; Isaac M. Held; Walter A. Robinson

2007-08-01T23:59:59.000Z

387

International Conference on Mathematics and Computational Methods Applied to Nuclear Science & Engineering (M&C 2013) Sun Valley, Idaho, USA, May 5-9, 2013, on CD-ROM, American Nuclear Society, LaGrange Park, IL (2013)  

E-Print Network (OSTI)

Monte Carlo simulation to model nuclear reactor dynamics. These Monte Carlo methods can be extremely://www.energy.gov/hubs) for Modeling and Simulation of Nuclear Reactors under U.S. Department of Energy Contract No. DE-AC05-00OR22725 for Solving k-Eigenvalue Problems in Neutron Diffusion Theory," Nuclear Science and Engineering, 167, pp. 141

Kelley, C. T. "Tim"

388

Brookhaven Women Engineers' Network  

NLE Websites -- All DOE Office Websites (Extended Search)

Home | Mission | Other links BWEN Brookhaven Women Engineers' Network BNLlogo Brookhaven Women Engineers' Network Network for professionals in engineering, computing and...

389

Meta search engine.  

E-Print Network (OSTI)

??Meta search engines allow multiple engine searches to minimize biased information and improve the quality of the results it generates. However, existing meta engine applications… (more)

Chan, Kwok-Pun

2007-01-01T23:59:59.000Z

390

PROCEEDINGS, Thirty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, January 31 -February 2, 2011  

E-Print Network (OSTI)

Stanford Geothermal Program Department of Energy Resources Engineering, 367 Panama Street Stanford the effect of shear-induced pore dilation, injection schedule, and the characteristic displacement scale dc/dynamic friction in McClure and Horne (2010). The effect of increasing characteristic displacement scale, dc

Stanford University

391

Friction control using ultrasonic oscillation for rolling-element linear-motion guide  

Science Conference Proceedings (OSTI)

This article reports a friction-control method for rolling-element linear-motion guides used for precision positioning. In general, static friction greater than dynamic friction generates stick-slip motion and diminishes the positioning accuracy. Two ultrasonic actuators excite both the rail and the carriage of the guide to give relative displacements to bearing surfaces. In order to effectively propagate the vibration over the entire rail without damping, the actuator drives at that frequency with a half wavelength corresponding to the distances between the rail mounting bolts. This also minimizes undesirable vibration of the machine structure. Moreover, the bearing surfaces of the carriage are resonated by a second ultrasonic actuator. The experiments using a force sensor showed that the static and dynamic friction forces were reduced by approximately 25% at any place on the 600-mm-long rail. Moreover, excitation only at very low velocity decreased the static friction peak.

Oiwa, Takaaki [Shizuoka University, 3-5-1 Hamamatsu, Shizuoka 432-8651 (Japan)

2006-01-15T23:59:59.000Z

392

Enabling High Efficiency Ethanol Engines  

Science Conference Proceedings (OSTI)

Delphi Automotive Systems and ORNL established this CRADA to explore the potential to improve the energy efficiency of spark-ignited engines operating on ethanol-gasoline blends. By taking advantage of the fuel properties of ethanol, such as high compression ratio and high latent heat of vaporization, it is possible to increase efficiency with ethanol blends. Increasing the efficiency with ethanol-containing blends aims to remove a market barrier of reduced fuel economy with E85 fuel blends, which is currently about 30% lower than with petroleum-derived gasoline. The same or higher engine efficiency is achieved with E85, and the reduction in fuel economy is due to the lower energy density of E85. By making ethanol-blends more efficient, the fuel economy gap between gasoline and E85 can be reduced. In the partnership between Delphi and ORNL, each organization brought a unique and complementary set of skills to the project. Delphi has extensive knowledge and experience in powertrain components and subsystems as well as overcoming real-world implementation barriers. ORNL has extensive knowledge and expertise in non-traditional fuels and improving engine system efficiency for the next generation of internal combustion engines. Partnering to combine these knowledge bases was essential towards making progress to reducing the fuel economy gap between gasoline and E85. ORNL and Delphi maintained strong collaboration throughout the project. Meetings were held regularly, usually on a bi-weekly basis, with additional reports, presentations, and meetings as necessary to maintain progress. Delphi provided substantial hardware support to the project by providing components for the single-cylinder engine experiments, engineering support for hardware modifications, guidance for operational strategies on engine research, and hardware support by providing a flexible multi-cylinder engine to be used for optimizing engine efficiency with ethanol-containing fuels.

Szybist, J.; Confer, K. (Delphi Automotive Systems)

2011-03-01T23:59:59.000Z

393

Engineers Constructors  

Office of Legacy Management (LM)

Engineers Engineers - Constructors ~ /:~ ( ' r,.... I!~\ l.,_",z;(J;' Bechtel National, Inc. Oak Ridge Office Jackson Plaza Tower 800 Oak Ridge Turnpike Oak Ridge. Tennessee Mail Address: P. O. B01l 350. Oak Ridge. TN 37830 bce-. R. Barber C. t1iller E. Wal ker C. Knoke G. Phillips G. Scott L. Blevins K. Harer DOE File No. 030-04G Professional Land Surveying 1404 Second Street Santa Fe, New Mexico 87501 Attn: Mr. Robert Benavides Reference: Purchase Contract l4501-01j04-PC-19 Bayo Canyon Survey Dear Mr. Benavides: The following are clarifications to the referenced contract specification. The need for clarification to the specification arises from the fact that the Bayo Canyon site is transected by a corporate boundary, the Los Alamos County-Santa Fe County line. This condition affects three items in the specification Scope Of Work: Item 1.2.5, the as-built site plan of the Bayo

394

Engineering internship at Brown & Root, Incorporated: a report  

E-Print Network (OSTI)

An engineering intership at Brown & Root, Incorporated was completed over a period slightly in excess of one year. During his internship, the industrial engineer was assigned tasks related to the organization of a manufacturing department and the pursuit and completion of its projects. Many of his contributions were system-related and involved sales, engineering proposals, engineering economy, contract negotiations, employee merit evaluation, design, and general groundwork. He was also assigned to two engineering projects concerning the design and construction of manufacturing facilities. One of the project assignments required international travel to England and Nigeria, and almost all of the assignments involved some aspect of engineering management.

Gannaway, Randall Joe, 1952-

1977-12-01T23:59:59.000Z

395

Engineered Fire Safety Group  

Science Conference Proceedings (OSTI)

Engineered Fire Safety Group. Welcome. ... Employment/Research Opportunities. Contact. Jason Averill, Leader. Engineered Fire Safety Group. ...

2012-06-05T23:59:59.000Z

396

Internal Dosimetry  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

MEASUREMENT MEASUREMENT SENSITIVE DOE-STD-1121-2008 Change Notice No.1 October 2013 DOE STANDARD INTERNAL DOSIMETRY U.S. Department of Energy AREA SAFT Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document is available on the Department of Energy Technical Standards Program Web Site at http://energy.gov/hss/information-center/department-energy- technical-standards-program ii Change Notice 1. Internal Dosimetry DOE-STD-1121-2008 Page/Section Change Throughout Change: airborne contamination To: airborne radioactivity Section 1.5, p. 4 Change: HPS N 13.1-1999 To: HPS N 13.1-2011 Section 1.5, p. 4 Change: HPS N 13.6-1999 To: HPS N 13,.6-2010 Section 1.5, p. 4 Delete: HPS N 13.14-1994, Internal Dosimetry Programs for

397

Tailored Materials for High Efficiency CIDI Engines  

DOE Green Energy (OSTI)

The overall goal of the project, Tailored Materials for High Efficiency Compression Ignition Direct Injection (CIDI) Engines, is to enable the implementation of new combustion strategies, such as homogeneous charge compression ignition (HCCI), that have the potential to significantly increase the energy efficiency of current diesel engines and decrease fuel consumption and environmental emissions. These strategies, however, are increasing the demands on conventional engine materials, either from increases in peak cylinder pressure (PCP) or from increases in the temperature of operation. The specific objective of this project is to investigate the application of a new material processing technology, friction stir processing (FSP), to improve the thermal and mechanical properties of engine components. The concept is to modify the surfaces of conventional, low-cost engine materials. The project focused primarily on FSP in aluminum materials that are compositional analogs to the typical piston and head alloys seen in small- to mid-sized CIDI engines. Investigations have been primarily of two types over the duration of this project: (1) FSP of a cast hypoeutectic Al-Si-Mg (A356/357) alloy with no introduction of any new components, and (2) FSP of Al-Cu-Ni alloys (Alloy 339) by physically stirring-in various quantities of carbon nanotubes/nanofibers or carbon fibers. Experimental work to date on aluminum systems has shown significant increases in fatigue lifetime and stress-level performance in aluminum-silicon alloys using friction processing alone, but work to demonstrate the addition of carbon nanotubes and fibers into aluminum substrates has shown mixed results due primarily to the difficulty in achieving porosity-free, homogeneous distributions of the particulate. A limited effort to understand the effects of FSP on steel materials was also undertaken during the course of this project. Processed regions were created in high-strength, low-alloyed steels up to 0.5 in. deep that showed significant grain refinement and homogeneous microstructures favorable to increased fracture toughness and fatigue performance. The final tasks of the project demonstrated that the FSP concept can be applied to a relevant part geometry by fabricating diesel piston crowns with FSP regions applied selectively to the edge of the bowl rim. This area of the piston typically suffers from conditions at high PCP that cause severe thermal fatigue issues. It is expected that, given the data from coupon testing, the durability of pistons modified by FSP will allow much higher fatigue lifetime and potentially also greater resistance to elevated stress-level effects on fatigue.

Grant, G.J.; Jana, S.

2012-03-30T23:59:59.000Z

398

Numerical tests of dynamical friction in gravitational inhomogeneous systems  

E-Print Network (OSTI)

In this paper, I test by numerical simulations the results of Del Popolo & Gambera (1998),dealing with the extension of Chandrasekhar and von Neumann's analysis of the statistics of the gravitational field to systems in which particles (e.g., stars, galaxies) are inhomogeneously distributed. The paper is an extension of that of Ahmad & Cohen (1974), in which the authors tested some results of the stochastic theory of dynamical friction developed by Chandrasekhar & von Neumann (1943) in the case of homogeneous gravitational systems. It is also a continuation of the work developed in Del Popolo (1996a,b), which extended the results of Ahmad & Cohen (1973), (dealing with the study of the probability distribution of the stochastic force in homogeneous gravitational systems) to inhomogeneous gravitational systems. Similarly to what was done by Ahmad & Cohen (1974) in the case of homogeneous systems, I test, by means of the evolution of an inhomogeneous system of particles, that the theoretical ...

Popolo, A D

2003-01-01T23:59:59.000Z

399

Frictionally induced ignition processes in drop and skid tests  

SciTech Connect

The standard LANL/Pantex drop and skid tests rely on subjective assessment of reaction violence to quantify the response of the charge, and completely miss nonpropagating hot-spot ignition sites. Additionally, large variations in test results have been observed, which we propose is due to a misunderstanding of the basic physical processes that lead to threshold ignition in these tests. The tests have been redesigned to provide control of these mechanisms and to permit direct observation of hot spots at the impact site, allowing us to follow the progression of the outcome as the drop height and ignition source density are varied. The results confirm that frictional interactions between high-melting-point solids are the dominant ignition mechanism, not just at the threshold, but in fact at all realistic drop heights.

Dickson, Peter [Los Alamos National Laboratory; Parker, Gary [Los Alamos National Laboratory; Novak, Alan [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

400

Energy conversion device and method of reducing friction therein  

DOE Patents (OSTI)

A device configured for converting energy includes a first surface, a second surface configured for moving with respect to the first surface during operation of the device, and a coating disposed on at least one of the first surface and the second surface. The coating includes a first layer of a ceramic alloy represented by the general formula AlMgB.sub.14--X, wherein X is present in an amount of from 0 to 70 parts by weight based on 100 parts by weight of the ceramic alloy and is a doping agent selected from the group of Group IV elements and borides and nitrides thereof, and a second layer disposed on the first layer and including carbon in a gradient concentration. The coating has a hardness of from 10 to 20 GPa and a coefficient of friction of less than or equal to 0.12.

Solovyeva, Lyudmila Mikhaylovna; Jansson, Kyle S; Elmoursi, Alaa AbdelAzim; Zhu, Dong; Milner, Robert; Daughterty, Early Eugene; Higdon, Clifton Baxter; Elagamy, Kamel Abdel-Khalik; Hicks, Aaron Michael

2013-10-08T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Integrated modeling and testing of a micro hinged structure for sliding friction measurement  

SciTech Connect

This paper summarizes the design, modeling, and initial evaluation of a hinged structure for friction measurement in surface micromachining technology. While the area requirements are small, the present structure allows a much larger velocity and pressure range to be evaluated as compared to comb drive structures. The device consists of a cantilevered driver beam connected to a friction pad through a strategically located hinge. AC excitation of the beam flexure forces axial sliding of the friction pad due to beam foreshortening. Normal force is controlled by DC voltage on wings adjacent to the friction pad. While the achievable slip is small (10--30 nm), it is sufficient to disengage contacting asperities and engage new points of contact, and thus should be representative of frictional processes. Furthermore, the design enables the friction pad contact area to remain relatively constant over the excitation cycle. Computer simulation results are provided to mimic on-going experimental work. Increased friction forces are shown to enhance the size of hysteresis loops relating beam deflection to driver voltage.

Redmond, J.M.; Boer, M.P. de; Michalske, T.A.

1998-08-01T23:59:59.000Z

402

Anti-friction properties of ester additives during hot rolling of aluminum{copyright}  

Science Conference Proceedings (OSTI)

Heavy esters of polyhydric alcohols, such as glycerol and synthetic polyols, are commonly used as additives in aluminum hot rolling lubricants. The presence of several hydroxyl groups allows a varying degree of esterification leading to the formation of full and partial esters. These esters are rarely separated from the main additive, and thus may be present in the finished rolling lubricant, affecting its anti-friction properties. The objective of this work was to examine the anti-friction properties of these potential ester contaminants during rolling on a laboratory hot rolling mill. Two lubricant application methods were examined; as emulsion and direct (neat oil) application. The anti-friction properties of additives were found to depend on their chemical structure and the lubricant applications method. In emulsified oils, partial esters of glycerol were found to greatly reduce friction in comparison to triglycerides, while the partial esters of synthetic polyols exhibited only a weak anti-friction effect. There was no frictional advantage observed which could be associated with using the partial esters in direct application mode. Moreover, under these conditions, the anti-friction properties of the completely esterified synthetic polyols were significantly lower than those of triglycerides, while in emulsions they were comparable. 11 refs., 7 figs., 3 tabs.

Januszkiewicz, K.R.; Bekmesian, G.; Heenan, D.F. [Alcan International Limited, Ontario (Canada)] [and others

1995-08-01T23:59:59.000Z

403

Engines - Spark Ignition Engines - Direct Injection - Omnivorous Engine  

NLE Websites -- All DOE Office Websites (Extended Search)

Direct Injection, Spark-Ignited Engines Direct Injection, Spark-Ignited Engines Omnivorous Engine Omnivorous Engine Setup Omnivorous Engine Setup New engine technology has made possible engines that will operate on a wide variety of fuel inputs, from gasoline to naptha to ethanol to methanol, without driver intervention. Although flexible fuel vehicles have been produced in the millions, their engines have always been optimized for gasoline operation while accepting significant performance and efficiency degradations when using the alternative fuel. This project seeks to combine in-cylinder measurement technology, and advanced controls to optimize spark timing, the quantity and timing of injected fuel, to produce an "omnivorous engine"--one that will be able to run on any liquid spark ignition fuel with optimal efficiency and low

404

Misfire identification in a four-stroke four-cylinder petrol engine using decision tree  

Science Conference Proceedings (OSTI)

Misfire detection in an internal combustion engine is very crucial to maintain optimum performance throughout its service life and to reduce emissions. The vibration of the engine block contains indirect information regarding the condition of the engine. ... Keywords: Decision tree, Engine condition monitoring, Feature selection, Knock, Misfire

S. Babu Devasenapati; V. Sugumaran; K. I. Ramachandran

2010-03-01T23:59:59.000Z

405

Dept. of Mechanical Engineering 1500 Engineering Dr.  

E-Print Network (OSTI)

of Diesel Engine, Exhaust System, Engine Emissions and Aftertreatment Device Models," SAE Paper 2005 Engine, Emissions, and Exhaust Aftertreatment System Level Model to Simulate Diesel Particulate Filter Diesel Engine, Emissions, and Exhaust Aftertreatment System Level Model," SAE 2009-01-1511, SAE

Sheridan, Jennifer

406

CHEMICAL ENGINEERING SCHOOL OF ENGINEERING & APPLIED SCIENCE  

E-Print Network (OSTI)

30 CHEMICAL ENGINEERING SCHOOL OF ENGINEERING & APPLIED SCIENCE MIAMI UNIVERSITY 2005-2006 The program leads to the degree, Bachelor of Science in Applied Science, with a major in Chemical Engineering The chemical engineering students learn to apply the concepts of chemistry, biochemistry and biological science

Dollar, Anna

407

Use of Textured Surfaces to Mitigate Sliding Friction and Wear of Lubricated and Non-Lubricated Contacts  

Science Conference Proceedings (OSTI)

If properly employed, the placement of three-dimensional feature patterns, also referred to as textures, on relatively-moving, load-bearing surfaces can be beneficial to their friction and wear characteristics. For example, geometric patterns can function as lubricant supply channels or depressions in which to trap debris. They can also alter lubricant flow in a manner that produces thicker load-bearing films locally. Considering the area occupied by solid areas and spaces, textures also change the load distribution on surfaces. At least ten different attributes of textures can be specified, and their combinations offer wide latitude in surface engineering. By employing directional machining and grinding procedures, texturing has been used on bearings and seals for well over a half century, and the size scales of texturing vary widely. This report summarizes past work on the texturing of load-bearing surfaces, including past research on laser surface dimpling of ceramics done at ORNL. Textured surfaces generally show most pronounced effects when they are used in conformal or nearly conformal contacts, like that in face seals. Combining textures with other forms of surface modification and lubrication methods can offer additional benefits in surface engineering for tribology. As the literature and past work at ORNL shows, texturing does not always provide benefits. Rather, the selected pattern and arrangement of features must be matched to characteristics of the proposed application, bearing materials, and lubricants.

Blau, Peter Julian [ORNL

2012-03-01T23:59:59.000Z

408

Ultra low friction carbon/carbon composites for extreme temperature applications  

DOE Patents (OSTI)

A carbon/carbon composite in which a carbon matrix containing a controlled amount of boron or a boron compound is reinforced with carbon fiber exhibits a low coefficient of friction, i.e., on the order of 0.04 to 0.1 at temperatures up to 600.degree. C., which is one of the lowest frictional coefficients for any type of carbonaceous material, including graphite, glassy carbon, diamond, diamond-like carbon and other forms of carbon material. The high degree of slipperiness of the carbon composite renders it particularly adapted for limiting friction and wear at elevated temperatures such as in seals, bearings, shafts, and flexible joints

Erdemir, Ali (Naperville, IL); Busch, Donald E. (Hinsdale, IL); Fenske, George R. (Downers Grove, IL); Lee, Sam (Gardena, CA); Shepherd, Gary (Los Alamitos, CA); Pruett, Gary J. (Cypress, CA)

2001-01-01T23:59:59.000Z

409

Small gas-turbine-engine technology  

SciTech Connect

Performance of small gas turbine engines in the 250 to 1000 hp size range is significantly lower than that of large engines. Engines of this size are typically used in rotorcraft, commutercraft, general aviation, and cruise missile applications. Principal reasons for lower efficiencies of smaller engines are well known: Component efficiencies are lower by as much as 8 to 10 percentage points because of size effects. Small engines are designed for lower cycle pressures and temperatures because of smaller blading and cooling limitations. The highly developed analytical and manufacturing techniques evolved for large engines are not directly transferrable to small engines. Thus, it has been recognized that a focused effort addressing technologies for small engines was needed and could significantly impact their performance. Recently, in-house and contract studies were undertaken to identify advanced engine cycle and component requirements for substantial performance improvement of small gas turbines for projected year 2000 applications. This paper presents results of both in-house research and contract studies, conducted with Allison, AVCO Lycoming, Garrett, Teledyne CAE, and Williams International Rotorcraft results are emphasized. Projected fuel savings of 22-42% could be attained. Accompanying direct operating cost reductions of 11-17%, depending on fuel cost, were also estimated. High payoff technologies are identified for all engine applications, and recent results of experimental research to evolve the high payoff technologies are described.

Niedwiecki, R.W.; Meitner, P.L.

1991-01-01T23:59:59.000Z

410

Modeling brittle fracture, slip weakening, and variable friction in geomaterials with an embedded strong discontinuity finite element.  

DOE Green Energy (OSTI)

Localized shear deformation plays an important role in a number of geotechnical and geological processes. Slope failures, the formation and propagation of faults, cracking in concrete dams, and shear fractures in subsiding hydrocarbon reservoirs are examples of important effects of shear localization. Traditional engineering analyses of these phenomena, such as limit equilibrium techniques, make certain assumptions on the shape of the failure surface as well as other simplifications. While these methods may be adequate for the applications for which they were designed, it is difficult to extrapolate the results to more general scenarios. An alternative approach is to use a numerical modeling technique, such as the finite element method, to predict localization. While standard finite elements can model a wide variety of loading situations and geometries quite well, for numerical reasons they have difficulty capturing the softening and anisotropic damage that accompanies localization. By introducing an enhancement to the element in the form of a fracture surface at an arbitrary position and orientation in the element, we can regularize the solution, model the weakening response, and track the relative motion of the surfaces. To properly model the slip along these surfaces, the traction-displacement response must be properly captured. This report focuses on the development of a constitutive model appropriate to localizing geomaterials, and the embedding of this model into the enhanced finite element framework. This modeling covers two distinct phases. The first, usually brief, phase is the weakening response as the material transitions from intact continuum to a body with a cohesionless fractured surface. Once the cohesion has been eliminated, the response along the surface is completely frictional. We have focused on a rate- and state-dependent frictional model that captures stable and unstable slip along the surface. This model is embedded numerically into the element using a generalized trapezoidal formulation. While the focus is on the constitutive model of interest, the framework is also developed for a general surface response. This report summarizes the major research and development accomplishments for the LDRD project titled 'Cohesive Zone Modeling of Failure in Geomaterials: Formulation and Implementation of a Strong Discontinuity Model Incorporating the Effect of Slip Speed on Frictional Resistance'. This project supported a strategic partnership between Sandia National Laboratories and Stanford University by providing funding for the lead author, Craig Foster, during his doctoral research.

Regueiro, Richard A. (University of Colorado, Boulder, CO); Borja, R. I. (Stanford University, Stanford, CA); Foster, C. D. (Stanford University, Stanford, CA)

2006-10-01T23:59:59.000Z

411

TransForum v6n1 - Argonne Engineers See into the Future of Hydrogen...  

NLE Websites -- All DOE Office Websites (Extended Search)

Argonne Engineers See into the Future of Hydrogen Internal Combustion Engines full-combustion image of OH This full-combustion image of OH* shows the number of H + O OH*...

412

Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen  

NLE Websites -- All DOE Office Websites (Extended Search)

Retooling Today's Retooling Today's Engines for the Hydrogen Economy to someone by E-mail Share Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen Economy on Facebook Tweet about Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen Economy on Twitter Bookmark Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen Economy on Google Bookmark Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen Economy on Delicious Rank Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen Economy on Digg Find More places to share Vehicle Technologies Office: Retooling Today's Engines for the Hydrogen Economy on AddThis.com... Retooling Today's Engines for the Hydrogen Economy Hydrogen-Powered Internal Combustion Engines Gain Momentum in the Quest to

413

Hybrid and conventional hydrogen engine vehicles that meet EZEV emissions  

DOE Green Energy (OSTI)

In this paper, a time-dependent engine model is used for predicting hydrogen engine efficiency and emissions. The model uses basic thermodynamic equations for the compression and expansion processes, along with an empirical correlation for heat transfer, to predict engine indicated efficiency. A friction correlation and a supercharger/turbocharger model are then used to calculate brake thermal efficiency. The model is validated with many experimental points obtained in a recent evaluation of a hydrogen research engine. A The validated engine model is then used to calculate fuel economy and emissions for three hydrogen-fueled vehicles: a conventional, a parallel hybrid, and a series hybrid. All vehicles use liquid hydrogen as a fuel. The hybrid vehicles use a flywheel for energy storage. Comparable ultra capacitor or battery energy storage performance would give similar results. This paper analyzes the engine and flywheel sizing requirements for obtaining a desired level of performance. The results indicate that hydrogen lean-burn spark-ignited engines can provide a high fuel economy and Equivalent Zero Emission Vehicle (EZEV) levels in the three vehicle configurations being analyzed.

Aceves, S.M.; Smith, J.R.

1996-12-10T23:59:59.000Z

414

Progress toward an optimized hydrogen series hybrid engine  

DOE Green Energy (OSTI)

The design considerations and computational fluid dynamics (CFD) modeling of a high efficiency, low emissions, hydrogen-fueled engine for use as the prime mover of a series hybrid automobile is described. The series hybrid automobile uses the engine to generate electrical energy via a lightweight generator, the electrical energy is stored in a power peaking device (like a flywheel or ultracapacitor) and used as required to meet the tractive drive requirements (plus accessory loads) through an electrical motor. The engine/generator is stopped whenever the energy storage device is fully charged. Engine power output required was determined with a vehicle simulation code to be 15 to 20 kW steady state with peak output of 40 to 45 kW for hill climb. Combustion chamber and engine geometry were determined from a critical review of the hydrogen engine experiments in the literature combined with a simplified global engine model. Two different engine models are employed to guide engine design. The models are a simplified global engine performance model that relies strongly on correlations with literature data for heat transfer and friction losses, and a state-of-the-art CFD combustion model, KIVA-3, to elucidate fluid mechanics and combustion details through full three-dimensional modeling. Both intake and exhaust processes as well as hydrogen combustion chemistry and thermal NO{sub x} production are simulated. Ultimately, a comparison between the simulation and experimental results will lead to improved modeling and will give guidance to changes required in the next generation engine to achieve the goal of 45% brake thermal efficiency.

Smith, J.R.; Aceves, S.M. [Lawrence Livermore National Lab., CA (United States); Johnson, N.L.; Amsden, A.A. [Los Alamos National Lab., NM (United States)

1995-06-01T23:59:59.000Z

415

INTERNATIONAL AGREEMENTS  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

INTERNATIONAL INTERNATIONAL AGREEMENTS Signed by Secretary Spencer Abraham January 2001-December 2004 TABLE OF CONTENTS Joint Statement of ntent between the Department of Energy of the United States ofAmerica and The Ministry of Energy and Mines of the Republic ofPeru on Cooperation in the Field of Energy -Tab 1 Fifth Hemispheric Energy Ministers Meeting Mexico City, Mexico - March 9, 2001. Mexico Declaration - Energy: A Crucial Factor for Integration and Sustainable Development in the Hemisphere - Tab 2 Extension of the Agreement for Energy Cooperation between the Department of Energy of the United States ofAmerica and the Secretariat ofEnergy of the United Mexican States, and its Four Annexes - Tab3 Implementing Agreement between the Department ofEnergy of the United States ofAmerica and the

416

International Energy Statistics  

U.S. Energy Information Administration (EIA)

> Countries > International Energy Statistics: International Energy Statistics; Petroleum. Production| Annual Monthly/Quarterly

417

" "," ",,," Steam Turbines Supplied by Either Conventional or Fluidized Bed Boilers",,,"Conventional Combusion Turbines with Heat Recovery",,,"Combined-Cycle Combusion Turbines",,,"Internal Combusion Engines with Heat Recovery",,," Steam Turbines Supplied by Heat Recovered from High-Temperature Processes",,,," "  

U.S. Energy Information Administration (EIA) Indexed Site

3 Relative Standard Errors for Table 8.3;" 3 Relative Standard Errors for Table 8.3;" " Unit: Percents." " "," ",,," Steam Turbines Supplied by Either Conventional or Fluidized Bed Boilers",,,"Conventional Combusion Turbines with Heat Recovery",,,"Combined-Cycle Combusion Turbines",,,"Internal Combusion Engines with Heat Recovery",,," Steam Turbines Supplied by Heat Recovered from High-Temperature Processes",,,," " " "," " ," " "NAICS Code(a)","Subsector and Industry","Establishments(b)","Establishments with Any Cogeneration Technology in Use(c)","In Use(d)","Not in Use","Don't Know","In Use(d)","Not in Use","Don't Know","In Use(d)","Not in Use","Don't Know","In Use(d)","Not in Use","Don't Know","In Use(d)","Not in Use","Don't Know"

418

Experimental investigation of energy dissipation behavior of the modified friction device  

E-Print Network (OSTI)

As building materials become stronger, dynamic design and structural control are effective means of improving serviceability in the future's ever lighter structures. The recently proposed modified friction device (MFD) ...

Zahner, Robert Marne

2011-01-01T23:59:59.000Z

419

Friction and Adhesion Forces of Bacillus thuringiensis Spores on Planar Surfaces in Atmospheric Systems  

SciTech Connect

The kinetic friction force and the adhesion force of Bacillus thuringiensis spores on planar surfaces in atmospheric systems were studied using atomic force microscopy. The influence of relative humidity (RH) on these forces varied for different surface properties including hydrophobicity, roughness, and surface charge. The friction force of the spore was greater on a rougher surface than on mica, which is atomically flat. As RH increases, the friction force of the spores decreases on mica whereas it increases on rough surfaces. The influence of RH on the interaction forces between hydrophobic surfaces is not as strong as for hydrophilic surfaces. The friction force of the spore is linear to the sum of the adhesion force and normal load on the hydrophobic surface. The poorly defined surface structure of the spore and the adsorption of contaminants from the surrounding atmosphere are believed to cause a discrepancy between the calculated and measured adhesion forces.

Kweon, Hyojin [Georgia Institute of Technology; Yiacoumi, Sotira [Georgia Institute of Technology; Tsouris, Costas [ORNL

2011-01-01T23:59:59.000Z

420

Cooperative and submolecular dissipation mechanisms of sliding friction in complex organic systems  

E-Print Network (OSTI)

- oretical friction dissipation models3 and computer simulations4 have significantly improved. Gao and J. P. Harmon, Thermochim. Acta 284, 85 1996 . 16 A. Wypych, E. Duval, G. Boiteux, J. Ulanski

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A Physically Consistent Formulation of Lateral Friction in Shallow-Water Equation Ocean Models  

Science Conference Proceedings (OSTI)

Dissipation in numerical ocean models has two purposes: to simulate processes in which the friction is physically relevant and to prevent numerical instability by suppressing accumulation of energy in the smallest resolved scales. This study ...

Alexander F. Shchepetkin; James J. O'Brien

1996-06-01T23:59:59.000Z

422

Dimensionally Consistent Similarity Relation of Ocean Surface Friction Coefficient in Mixed Seas  

Science Conference Proceedings (OSTI)

Applying wavelength scaling, dimensionally consistent expressions of the ocean surface friction coefficient can be developed for both wind sea and mixed sea in the ocean. For a wind sea with a monopeak wave spectrum, the natural choice of the ...

Paul A. Hwang; Héctor García-Nava; Francisco J. Ocampo-Torres

2011-06-01T23:59:59.000Z

423

Friction Stir Processing of Ti-6Al-4V for Grain Size Reduction in ...  

Science Conference Proceedings (OSTI)

In Ti alloys, such as Ti-6Al-4V, fusion welding results in coarse-grained microstructure ... Friction Stir Spot Welding of Magnesium to Aluminum Alloys with a Cold ...

424

Defining the role of elastic lubricants and micro textured surfaces in lubricated, sliding friction  

E-Print Network (OSTI)

Solutions for reducing friction in sliding, lubricated systems include modifying lubricant rheology using polymers and adding a micro-scale texture to the sliding surfaces, but the mechanism of how lubrication properties ...

Hupp, Sara J. (Sara Jean), 1979-

2008-01-01T23:59:59.000Z

425

Engineering Fundamentals - Electrical Engineering, Version 2.0  

Science Conference Proceedings (OSTI)

Engineering Fundamentals – Electrical Engineering (EF-EE) covers the basics of electrical engineering topics. The module provides information about basic electrical engineering terms and concepts that help identify ...

2013-02-05T23:59:59.000Z

426

Renewable Energy Engineering  

E-Print Network (OSTI)

MSc in Renewable Energy Engineering School of Engineering www.cranfield.ac.uk/soe/renewableenergy #12;Postgraduate study Cranfield University 2 School of Engineering MSc in Renewable Energy Engineering Renewable Energy Engineering MSc in Climate change, growing world populations and limited fossil

427

Chemical engineering Research !!  

E-Print Network (OSTI)

Chemical engineering Research !! www.chemeng.lth.se Updated August 2012 #12;WWT Fermentation University/Faculty of Engineering-LTH/Department of Chemical Engineering Membrane Group Ann-Sofi Jönsson More research projects. #12;Lund University/Faculty of Engineering-LTH/Department of Chemical Engineering

428

Hard and low friction nitride coatings and methods for forming the same  

DOE Patents (OSTI)

An improved coating material possessing super-hard and low friction properties and a method for forming the same. The improved coating material includes the use of a noble metal or soft metal homogeneously distributed within a hard nitride material. The addition of small amounts of such metals into nitrides such as molybdenum nitride, titanium nitride, and chromium nitride results in as much as increasing of the hardness of the material as well as decreasing the friction coefficient and increasing the oxidation resistance.

Erdemir, Ali (Naperville, IL); Urgen, Mustafa (Istanbul, TR); Cakir, Ali Fuat (Istanbul, TR); Eryilmaz, Osman Levent (Bolingbrook, IL); Kazmanli, Kursat (Istanbul, TR); Keles, Ozgul (Istanbul, TR)

2007-05-01T23:59:59.000Z

429

Engine spray combustion modeling using unified spray model with dynamic mesh refinement.  

E-Print Network (OSTI)

??The primary objective of this study is to improve the spray and combustion modeling of internal combustion engines using dynamic mesh refinement. The first part… (more)

Kolakaluri, Ravi

2009-01-01T23:59:59.000Z

430

Thermal engine driven heat pump for recovery of volatile organic compounds  

DOE Patents (OSTI)

The present invention relates to a method and apparatus for separating volatile organic compounds from a stream of process gas. An internal combustion engine drives a plurality of refrigeration systems, an electrical generator and an air compressor. The exhaust of the internal combustion engine drives an inert gas subsystem and a heater for the gas. A water jacket captures waste heat from the internal combustion engine and drives a second heater for the gas and possibly an additional refrigeration system for the supply of chilled water. The refrigeration systems mechanically driven by the internal combustion engine effect the precipitation of volatile organic compounds from the stream of gas.

Drake, Richard L. (Schenectady, NY)

1991-01-01T23:59:59.000Z

431

Method for valve seating control for an electro-hydraulic engine valve  

DOE Patents (OSTI)

Valve lift in an internal combustion engine is controlled by an electro-hydraulic actuation mechanism including a selectively actuable hydraulic feedback circuit.

Sun, Zongxuan (Plymouth, MN)

2011-01-11T23:59:59.000Z

432

Engine Valve Actuation For Combustion Enhancement  

DOE Patents (OSTI)

A combustion chamber valve, such as an intake valve or an exhaust valve, is briefly opened during the compression and/or power strokes of a 4-stroke combustion cycle in an internal combustion engine (in particular, a diesel or CI engine). The brief opening may (1) enhance mixing withing the combustion chamber, allowing more complete oxidation of particulates to decrease engine emissions; and/or may (2) delay ignition until a more desirable time, potentially allowing a means of timing ignition in otherwise difficult-to-control conditions, e.g., in HCCI (Homogeneous Charge Compression Ignition) conditions.

Reitz, Rolf Deneys (Madison, WI); Rutland, Christopher J. (Madison, WI); Jhavar, Rahul (Madison, WI)

2004-05-18T23:59:59.000Z

433

Engine valve actuation for combustion enhancement  

DOE Patents (OSTI)

A combustion chamber valve, such as an intake valve or an exhaust valve, is briefly opened during the compression and/or power strokes of a 4-strokes combustion cycle in an internal combustion engine (in particular, a diesel or CI engine). The brief opening may (1) enhance mixing withing the combustion chamber, allowing more complete oxidation of particulates to decrease engine emissions; and/or may (2) delay ignition until a more desirable time, potentially allowing a means of timing ignition in otherwise difficult-to-control conditions, e.g., in HCCI (Homogeneous Charge Compression Ignition) conditions.

Reitz, Rolf Deneys (Madison, WI); Rutland, Christopher J. (Madison, WI); Jhavar, Rahul (Madison, WI)

2008-03-04T23:59:59.000Z

434

Characteristics of the Limit Cycle of a Reciprocating Quantum Heat Engine  

E-Print Network (OSTI)

When a reciprocating heat engine is started it eventually settles to a stable mode of operation. The approach of a first principle quantum heat engine toward this stable limit cycle is studied. The engine is based on a working medium consisting of an ensemble of quantum systems composed of two coupled spins. A four stroke cycle of operation is studied, with two {\\em isochore} branches where heat is transferred from the hot/cold baths and two {\\em adiabats} where work is exchanged. The dynamics is generated by a completely positive map. It has been shown that the performance of this model resembles an engine with intrinsic friction. The quantum conditional entropy is employed to prove the monotonic approach to a limit cycle. Other convex measures, such as the quantum distance display the same monotonic approach. The equations of motion of the engine are solved for the different branches and are combined to a global propagator that relates the state of the engine in the beginning of the cycle to the state after one period of operation of the cycle. The eigenvalues of the propagator define the rate of relaxation toward the limit cycle. A longitudinal and transverse mode of approach to the limit cycle is identified. The entropy balance is used to explore the necessary conditions which lead to a stable limit cycle. The phenomena of friction can be identified with a zero change in the von Neumann entropy of the working medium.

Tova Feldmann; Ronnie Kosloff

2004-05-28T23:59:59.000Z

435

More bang for your buck: Towards super-adiabatic quantum engines  

E-Print Network (OSTI)

The reversible nature of thermodynamical cycles is an idealisation based on the assumption of perfect quasi-static dynamics. As a consequence of this assumption, ideal engines operate at the maximum efficiency but have zero power. Realistic engines, on the other hand, operate in finite-time and are intrinsically irreversible, implying friction effects at short cycle times. The engineering goal is to find the maximum efficiency allowed at the maximum possible power. In the current technological age, with our ability to manipulate devices at the nanoscale and beyond, one must understand the consequences of engines which operate at the quantum mechanical level. In this domain one cannot avoid the emergence of both quantum and thermal fluctuations which drastically alter the energetics of the cycle. Very recently, it has been shown that the Hamiltonian of a quantum system may be manipulated in such a way as to mimic an adiabatic process via a non-adiabatic shortcut. A surge of experimental progress has demonstrated several of these proposals in the laboratory. In this paper we show that, by utilising shortcuts to adiabaticity in a quantum engine cycle, one can engineer a thermodynamical cycle working at finite power and zero friction. Our findings are elucidated using a harmonic oscillator undergoing a quantum Otto cycle.

A. del Campo; J. Goold; M. Paternostro

2013-05-14T23:59:59.000Z

436

Congeneration system with a Stirling engine  

SciTech Connect

This patent describes a cogeneration system for producing process heat for useful purposes and electric energy. It comprises an electric generator; a Stirling cycle engine having an output shaft operatively coupled to the generator for driving the generator, the engine including at least one internal fuel combustor; means for circulating a cooling liquid about the generator and engine to extract heat therefrom; an exhaust system coupled with the engine for exhausting combustion gases from the engine, the exhaust system including a condensing heat exchanger for cooling the combustion gases below the condensing, temperature of the water vapor in the exhaust gases; means for directing the cooling liquid around the condensing heat exchanger to extract heat therefrom and heat the liquid; and means for directing the cooling liquid for useful purposes.

Meijer, R.J.; Meijer, E.J.; Godett, T.M.

1991-12-24T23:59:59.000Z

437

Enhancing trappable antiproton populations through deceleration and frictional cooling  

SciTech Connect

CERN currently delivers antiprotons for trapping experiments with the Antiproton Decelerator (AD), which slows the antiprotons down to about 5 MeV.This energy is currently too high for direct trapping, and thick foils are used to slow down the beam to energies which can be trapped.To allow further deceleration to $\\sim 100 \\;\\mbox{keV}$, CERN is initiating the construction of ELENA,consisting of a ring which will combine RF deceleration and electron cooling capabilities. We describe a simple frictionalcooling scheme that can serve to provide significantly improved trapping efficiency, either directly from the AD or first usinga standard deceleration mechanism (induction linac or RFQ). This scheme could be implemented in a short time.The device itself is short in length, uses accessible voltages, and at reasonable cost could serve in the interim beforeELENA becomes operational, or possibly in lieu of ELENA for some experiments. Simple theory and simulations provide a preliminary assessment of theconcept and its strengths and limitations, and highlight important areas for experimental studies, in particular to pin down the level of multiplescattering for low-energy antiprotons. We show that the frictional cooling scheme can provide a similar energy spectrum to that of ELENA,but with higher transverse emittances.

Zolotorev, Max; Sessler, Andrew; Penn, Gregory; Wurtele, Jonathan S.; Charman, Andrew E.

2012-03-20T23:59:59.000Z

438

Stirling Engine Assessment  

Science Conference Proceedings (OSTI)

Stirling engines are reciprocating engines that are fueled by an external heat source. This report presents a summary of the technical trends, commercialization status, and economic viability of Stirling engine technology for distributed generation (DG) applications.

2002-10-28T23:59:59.000Z

439

Science Technology Engineering Math Science Technology Engineering Math Mechanical Engineering Aerospace Engineering  

E-Print Network (OSTI)

Science Technology Engineering Math Science Technology Engineering Math Mechanical Engineering Loop glider Airboat Straw rockets College Class Science Activity Stomp rockets Underwater copters AND/OR Circuits College Class Science Activity Electronic T/F Motorized flying gliders

Rohs, Remo

440

DOE Solar Decathlon: Engineering  

NLE Websites -- All DOE Office Websites (Extended Search)

U.S. Department of Energy Solar Decathlon Contests Engineering The U.S. Department of Energy Solar Decathlon houses represent the best of modern engineering. For the Engineering...

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Engineering Experimentation - Nuclear Engineering Division (Argonne...  

NLE Websites -- All DOE Office Websites (Extended Search)

such as corrosivehazardous materials, high-temperature structural integrity, and remote handling. More... NE Departments involved: Engineering Development and...

442

Hydrogen engine performance analysis project. Second annual report  

DOE Green Energy (OSTI)

Progress in a 3 year research program to evaluate the performance and emission characteristics of hydrogen-fueled internal combustion engines is reported. Fifteen hydrogen engine configurations will be subjected to performance and emissions characterization tests. During the first two years, baseline data for throttled and unthrottled, carburetted and timed hydrogen induction, Pre IVC hydrogen-fueled engine configurations, with and without exhaust gas recirculation (EGR) and water injection, were obtained. These data, along with descriptions of the test engine and its components, the test apparatus, experimental techniques, experiments performed and the results obtained, are given. Analyses of other hydrogen-engine project data are also presented and compared with the results of the present effort. The unthrottled engine vis-a-vis the throttled engine is found, in general, to exhibit higher brake thermal efficiency. The unthrottled engine also yields lower NO/sub x/ emissions, which were found to be a strong function of fuel-air equivalence ratio. (LCL)

Adt, Jr., R. R.; Swain, M. R.; Pappas, J. M.

1980-01-01T23:59:59.000Z

443

International Fuel Technology Inc | Open Energy Information  

Open Energy Info (EERE)

Fuel Technology Inc Fuel Technology Inc Jump to: navigation, search Name International Fuel Technology Inc Place St. Louis, Missouri Zip 63105 Product Supplier of environmentally friendly surfactant-based fuel additives designed to significantly reduce harmful emissions produced from internal combustion engines. References International Fuel Technology Inc[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. International Fuel Technology Inc is a company located in St. Louis, Missouri . References ↑ "International Fuel Technology Inc" Retrieved from "http://en.openei.org/w/index.php?title=International_Fuel_Technology_Inc&oldid=347044" Categories: Clean Energy Organizations

444

Ultimate search engine.  

E-Print Network (OSTI)

??The search engine is a tool designed to search for information on the web according to the keywords specified by users. Different search engines are… (more)

Patel, Chirag

2012-01-01T23:59:59.000Z

445

Los Alamos Lab: International and Applied Technology Division...  

NLE Websites -- All DOE Office Websites (Extended Search)

International Research and Analysis, IAT-1 IAT-1 has one of the most diverse work forces in the division. By applying its scientific and engineering skills to designated problems,...

446

Internal Dosimetry  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

21-2008 21-2008 October 2008 DOE STANDARD INTERNAL DOSIMETRY U.S. Department of Energy AREA SAFT Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. NOT MEASUREMENT SENSITIVE ii This document is available on the Department of Energy Technical Standards Program Web Site at http://www.hss.energy.gov/nuclearsafety/techstds/ DOE-STD-1121-2008 iii FOREWORD 1. This Department of Energy (DOE) standard is approved for use by all DOE Components and their contractors. 2. Constructive comments (recommendations, additions, deletions) and any pertinent data that may improve this document should be sent to Office of Worker Safety and Health Policy (HS-11) U.S. Department of Energy Washington, DC 20585

447

Intern Programs | IPM  

NLE Websites -- All DOE Office Websites (Extended Search)

enrolled in four-year U.S. colleges and universities. Internships available in physics, electrical engineering, mechanical engineering and computer science offer a chance for...

448

CYCLE-BY-CYCLE COMBUSTION VARIATIONS IN SPARK-IGNITED ENGINES Engineering Technology Division, Oak Ridge National Laboratory, Oak Ridge TN 37831-8088 USA  

E-Print Network (OSTI)

CYCLE-BY-CYCLE COMBUSTION VARIATIONS IN SPARK-IGNITED ENGINES C.S. DAW Engineering Technology-2053 USA ABSTRACT Under constant nominal operating conditions, internal combustion engines can exhibit sub- stantial variation in combustion efficiency from one cycle to the next. Previous researchers have attempted

Tennessee, University of

449

Essays on Monetary Policy and International Macroeconomics  

E-Print Network (OSTI)

stochastic general equilibrium model with search and matching frictionsstochastic general equilibrium (DSGE) model with search and matching frictions

Mileva, Mariya

2012-01-01T23:59:59.000Z

450

A framework for design engineering education in a global context  

Science Conference Proceedings (OSTI)

This paper presents a framework for teaching design engineering in a global context using innovative technologies to enable distributed teams to work together effectively across international and cultural boundaries. The Digital Libraries for Global ... Keywords: Design Education, Design Engineering, Digital Libraries, Distributed Working

Andrew j. Wodehouse; Hilary j. Grierson; Caroline Breslin; Ozgur Eris; William j. Ion; Larry j. Leifer; Ade Mabogunje

2010-08-01T23:59:59.000Z

451

Benchmarking of New and Emerging Reciprocating Engine Products  

Science Conference Proceedings (OSTI)

Internal combustion engines (ICEs) fueled by diesel and natural gas continue to be a low-cost option for distributed generation of electric power. This report presents a summary of new and emerging products and technologies from major engine manufacturers in the United States, Europe, and the Far East.

2001-12-20T23:59:59.000Z

452

FY08 Engineering Research and Technology Report  

Science Conference Proceedings (OSTI)

This report summarizes the core research, development, and technology accomplishments in Lawrence Livermore National Laboratory's Engineering Directorate for FY2008. These efforts exemplify Engineering's more than 50-year history of developing and applying the technologies needed to support the Laboratory's national security missions. A partner in every major program and project at the Laboratory throughout its existence, Engineering has prepared for this role with a skilled workforce and technical resources developed through both internal and external venues. These accomplishments embody Engineering's mission: 'Enable program success today and ensure the Laboratory's vitality tomorrow.' Engineering's mission is carried out through basic research and technology development. Research is the vehicle for creating competencies that are cutting-edge, or require discovery-class groundwork to be fully understood. Our technology efforts are discipline-oriented, preparing research breakthroughs for broader application to a variety of Laboratory needs. The term commonly used for technology-based projects is 'reduction to practice.' As we pursue this two-pronged approach, an enormous range of technological capabilities result. This report combines our work in research and technology into one volume, organized into thematic technical areas: Engineering Modeling and Simulation; Measurement Technologies; Micro/Nano-Devices and Structures; Engineering Systems for Knowledge and Inference; and Energy Manipulation. Our investments in these areas serve not only known programmatic requirements of today and tomorrow, but also anticipate the breakthrough engineering innovations that will be needed in the future.

Minichino, C; McNichols, D

2009-02-24T23:59:59.000Z

453

Method and system for controlled combustion engines  

DOE Patents (OSTI)

A system for controlling combustion in internal combustion engines of both the Diesel or Otto type, which relies on establishing fluid dynamic conditions and structures wherein fuel and air are entrained, mixed and caused to be ignited in the interior of a multiplicity of eddies, and where these structures are caused to sequentially fill the headspace of the cylinders.

Oppenheim, A. K. (Berkeley, CA)

1990-01-01T23:59:59.000Z

454

HCCI engine control and optimization  

E-Print Network (OSTI)

natural gas engine setup for stationary power generation. . . . . . . . . . .natural gas engine setup for stationary power generation.

Killingsworth, Nicholas J.

2007-01-01T23:59:59.000Z

455

International Energy Statistics  

U.S. Energy Information Administration (EIA)

> Countries > International Energy Statistics: International Energy Statistics; Petroleum. Production| ... Jordan 91.087 90.500 85 76.075 ...

456

International Energy Statistics  

U.S. Energy Information Administration (EIA)

> Countries > International Energy Statistics: International Energy Statistics; Petroleum. Production| ... 2013 Africa 117.064 119.114 123.609 ...

457

IWA (International Workshop Agreement)  

Science Conference Proceedings (OSTI)

IWA content IWA (International Workshop Agreement) iso1rss IWA (International Workshop Agreement) Past Meeting Presentations 2nd Internati

458

NCSL International Technical Exchange  

Science Conference Proceedings (OSTI)

NCSL International Technical Exchange. Purpose: The NCSL International ... Charleston, SC 29418. Technical Contact: Val Miller (301) 975-3602.

2013-02-19T23:59:59.000Z

459

Fifth EPRI International Conference on Maintenance Proceedings  

Science Conference Proceedings (OSTI)

The Fifth EPRI International Conference on Maintenance focused primarily on fossil and nuclear generating assets, but many topics will be applicable to other assets, as well. Equipment manufacturers, vendors, architect/engineers, and consultants will also find this conference prodedings to be informative and valuable.

2005-12-23T23:59:59.000Z

460

Life Cycle Engineering Group  

Science Conference Proceedings (OSTI)

... for green manufacturing and construction applications; conduct life cycle engineering assessments for energy efficiency and environmental ...

2012-08-23T23:59:59.000Z

Note: This page contains sample records for the topic "internal engine friction" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

and Chemical Engineering  

E-Print Network (OSTI)

Biological and Chemical Engineering Building #12;2 Biological and Chemical Engineering Building sta is constructing a new building that will house the Department of Chemical Engineering and the Department and Chemical Engineering Building will provide critically needed space for innovators in multiple disciplines

Prinz, Friedrich B.

462

Combined-Admission Engineering.  

E-Print Network (OSTI)

that include relevant engineering experiences, such as FIRST Robotics, Talent Search, or Science/Math Bowl students with an assurance of admission to the Hajim School of Engineering and Applied Sciences in one Science · Electrical and Computer Engineering · Materials Science · Mechanical Engineering · Optics

Portman, Douglas

463

Argonne TDC: Engineering Technologies  

Emergency Response. Engineering. Environmental Research. Fuel Cells. Imaging Technology. Material Science. Nanotechnology. Physical Sciences. Sensor ...

464

Science and Engineering Indicators: 2012 | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

and Engineering Indicators: 2012 and Engineering Indicators: 2012 BusinessUSA Data/Tools Apps Challenges Let's Talk BusinessUSA You are here Data.gov » Communities » BusinessUSA » Data Science and Engineering Indicators: 2012 Dataset Summary Description Science and Engineering Indicators (SEI) comprises quantitative data on the U.S. and international science and engineering enterprise. The "indicators" are quantitative representations that provide summary information on the scope, quality, and vitality of science and engineering. SEI employs a variety of presentation styles including tables, figures, narrative text, bulleted text, Web-based links, highlights, introductions, conclusions, reference list to make the data accessible to readers with different information needs and information-processing preferences. SEI's 8 chapters cover the following subjects: 1) Elementary and Secondary Mathematics and Science Education 2) Higher Education in Science and Engineering 3) Science and Engineering Labor Force 4) Research and Development: National Trends and International Comparisons 5) Academic Research and Development 6) Industry, Technology, and the Global Marketplace 7) Science and Technology: Public Attitudes and Understanding 8) State Indicators SEI is prepared by the National Science Foundation's National Center for Science and Engineering Statistics (NCSES) under the guidance of the National Science Board (Board). It is subject to extensive review by outside experts, interested federal agencies, Board members, and NSF internal reviewers for accuracy, coverage, and balance.

465

Artificial Intelligence and Systems Engineering  

E-Print Network (OSTI)

/PR URL: http://www.dotomi.com Job Titles: Engineering/IT Apprentice, Client Development/Sales Apprentice, Media Apprentice, Account Management Apprentice, Quality Assurance Apprentice Majors: Business: Business. - BS, Engineering: Contract Major, Engineering: Electrical, Engineering: Industrial, Engineering

Sommerville, Ian

466

Velocity-Dependent Friction and Diffusion for Grains in Neutral Gases, Dusty Plasmas and Active Systems  

E-Print Network (OSTI)

A self-consistent and universal description of friction and diffusion for Brownian particles (grains) in different systems, as a gas with Boltzmann collisions, dusty plasma with ion absorption by grains, and for active particles (e.g., cells in biological systems) is suggested on the basis of the appropriate Fokker-Planck equation. Restrictions for application of the Fokker-Planck equation to the problem of velocity-dependent friction and diffusion coefficients are found. General description for this coefficient is formulated on the basis of master equation. Relation of the diffusion coefficient in the coordinate and velocity spaces is found for active (capable to transfer momentum to the ambient media) and passive particles in the framework of the Fokker-Planck equation. The problem of anomalous space diffusion is formulated on the basis of the appropriate probability transition (PT) function. The method of partial differentiation is avoided to construct the correct probability distributions for arbitrary distances, what is important for applications to different stochastic problems. Generale equation for time-dependent PT function is formulated and discussed. Generalized friction in the velocity space is determined and applied to describe the friction force itself as well as the drag force in the case of a non-zero driven ion velocity in plasmas. The negative friction due to ion scattering on grains exists and can be realized for the appropriate experimental conditions.

S. A. Trigger; G. J. F. van Heijst; P. P. J. M. Schram

2004-01-19T23:59:59.000Z

467

Velocity-Dependent Friction and Diffusion for Grains in Neutral Gases, Dusty Plasmas and Active Systems  

E-Print Network (OSTI)

A self-consistent and universal description of friction and diffusion for Brownian particles (grains) in different systems, as a gas with Boltzmann collisions, dusty plasma with ion absorption by grains, and for active particles (e.g., cells in biological systems) is suggested on the basis of the appropriate Fokker-Planck equation. Restrictions for application of the Fokker-Planck equation to the problem of velocity-dependent friction and diffusion coefficients are found. General description for this coefficient is formulated on the basis of master equation. Relation of the diffusion coefficient in the coordinate and velocity spaces is found for active (capable to transfer momentum to the ambient media) and passive particles in the framework of the Fokker-Planck equation. The problem of anomalous space diffusion is formulated on the basis of the appropriate probability transition (PT) function. The method of partial differentiation is avoided to construct the correct probability distributions for arbitrary distances, what is important for applications to different stochastic problems. Generale equation for time-dependent PT function is formulated and discussed. Generalized friction in the velocity space is determined and applied to describe the friction force itself as well as the drag force in the case of a non-zero driven ion velocity in plasmas. The negative friction due to ion scattering on grains exists and can be realized for the appropriate experimental conditions.

S. A. Trigger; G. J. F. Van Heijst; P. P. J. M. Schram

2004-01-01T23:59:59.000Z

468

Engineering Analysis - Nuclear Engineering Division (Argonne)  

NLE Websites -- All DOE Office Websites (Extended Search)

Analysis Analysis DEPARTMENTS Engineering Analysis Nuclear Systems Analysis Research & Test Reactor Nonproliferation and National Security Detection & Diagnostic Systems Engineering Development & Applications Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Engineering Analysis Bookmark and Share The Engineering Analysis Department activities focus on development and application of new and innovative analysis methods for both nuclear and non-nuclear systems. The Department is organized into sections and groups for Engineering Simulations, Safety Analysis, Innovative Systems Development, Engineering Assessments, Plant Analysis & Control, Process

469

Senior Systems Engineer | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Senior Systems Engineer | National Nuclear Security Administration Senior Systems Engineer | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > Regina Griego Senior Systems Engineer Regina Griego Regina Griego Role: Senior Systems Engineer Profile: Regina Griego has been elected a fellow of the International Council on

470

Nevis Engine Company | Open Energy Information  

Open Energy Info (EERE)

Nevis Engine Company Nevis Engine Company Jump to: navigation, search Name Nevis Engine Company Place London, Greater London, United Kingdom Zip WIT IDG Sector Efficiency Product Developer of an internal combustion engine that hopes to double fuel efficiency. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

471

Hybrid vehicle system studies and optimized hydrogen engine design  

DOE Green Energy (OSTI)

We have done system studies of series hydrogen hybrid automobiles that approach the PNGV design goal of 34 km/liter (80 mpg), for 384 km (240 mi) and 608 km (380 mi) ranges. Our results indicate that such a vehicle appears feasible using an optimized hydrogen engine. We have evaluated the impact of various on-board storage options on fuel economy. Experiments in an available engine at the Sandia CRF demonstrated NO{sub x} emissions of 10 to 20 ppM at an equivalence ratio of 0.4, rising to about 500 ppm at 0.5 equivalence ratio using neat hydrogen. Hybrid simulation studies indicate that exhaust NO{sub x} concentrations must be less than 180 ppM to meet the 0.2 g/mile ULEV or Federal Tier II emissions regulations. LLNL has designed and fabricated a first generation optimized hydrogen engine head for use on an existing Onan engine. This head features 15:1 compression ratio, dual ignition, water cooling, two valves and open quiescent combustion chamber to minimize heat transfer losses. Initial testing shows promise of achieving an indicated efficiency of nearly 50% and emissions of less than 100 ppM NO{sub x}. Hydrocarbons and CO are to be measured, but are expected to be very low since their only source is engine lubricating oil. A successful friction reduction program on the Onan engine should result in a brake thermal efficiency of about 42% compared to today`s gasoline engines of 32%. Based on system studies requirements, the next generation engine will be about 2 liter displacement and is projected to achieve 46% brake thermal efficiency with outputs of 15 kW for cruise and 40 kW for hill climb.

Smith, J.R.; Aceves, S.

1995-04-26T23:59:59.000Z

472

Engineering Computation and Design - Nuclear Engineering Division...  

NLE Websites -- All DOE Office Websites (Extended Search)

applied in such diverse areas as vacuum and cryogenic systems, manufacturing engineering, hot cell equipment, and spent fuel processing systems. More... NE Departments involved:...

473

DOE Solar Decathlon: Florida International University: Weathering the Storm  

NLE Websites -- All DOE Office Websites (Extended Search)

Florida International's Solar Decathlon 2005 house in its permanent location on the university's campus. Florida International's Solar Decathlon 2005 house in its permanent location on the university's campus. Enlarge image Engawa enjoys blue skies over the Florida International University campus. (Courtesy of Florida International University) Who: Florida International University What: Engawa Where: Florida International University 10555 West Flagler St. Miami, FL 33172 Map This House Public tours: Not available Solar Decathlon 2005 Florida International University: Weathering the Storm Student decathletes from Florida International University built Engawa for the U.S. Department of Energy Solar Decathlon 2005. After the competition, they reconstructed the hurricane-prone house near the engineering building on Florida International University's campus. They also made several

474

International Conference on Carbon Nanotechnology: Potential and Challenges (Carbon 10)  

E-Print Network (OSTI)

International Conference on Carbon Nanotechnology: Potential and Challenges (Carbon 10) 15 - 17th Since the discovery of the carbon nanotube (CNT) about two decades ago, research related to its of Materials and Process Engineering Kanpur Chapter hosted the `International Conference on Carbon

Srivastava, Kumar Vaibhav

475

Virtual International Research/Education Center: Energy Saving LEDs  

Science Conference Proceedings (OSTI)

This paper presents an establish and operation of energy saving LEDs virtual international research/education center. This is a long-term international engineering education and research collaboration program among California Polytechnic State University ... Keywords: Virtual, research/education center, LEDs

Xiaomin Jin, Xiao-Hua Yu, Xiang-Ning Kang, Guo-Yi Zhang, Guifang Dong

2013-07-01T23:59:59.000Z

476

SYSTEM PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP  

E-Print Network (OSTI)

+Introduction on Low Thermal Energy Stirling Engine Photos from the last friendship get-together #12;-Nano System Engineering Title of his talk: I am a Gaijin: From Dream to Expectation to Reality Dr. Emanuel Leleito International Student Advisor, School of Engineering Title of his talk: Japan Life: Looking Back

Oak Ridge National Laboratory

477

Sodium compatibility studies of low friction carbide coatings for reactor application  

SciTech Connect

Design requirements for low friction materials in FFTF have led to an experimental sodium compatibility program, the objective of which is to select and qualify a low friction coating for the fuel assembly duct load pad. Results are given for chromium carbide and titanium carbide-based coatings on stainless steel exposed to 1160 deg F sodium for several thousand hours. A chromium carbide coating (with a nichrome binder) having an average corrosion rate of approximately 0.25 mpy exhibits optimum sodium compatibility behavior of the materials examined. Both plasma-sprayed chromium carbide and titanium carbide based coatings were found to be unstable when exposed to sodium. (auth)

Whitlow, G.A.; Miller, R.L.; Schrock, S.L.; Wu, P.C.S.