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Note: This page contains sample records for the topic "braking anti-lock brakes" 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.


1

E-Print Network 3.0 - anti-lock braking system Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

such as trucks, tractor... -trailers and buses. In these brake systems, compressed air is used as the energy transmitting medium to actuate... the foundation brakes mounted...

2

Gravity brake  

DOE Patents [OSTI]

A mechanical gravity brake that prevents hoisted loads within a shaft from free-falling when a loss of hoisting force occurs. A loss of hoist lifting force may occur in a number of situations, for example if a hoist cable were to break, the brakes were to fail on a winch, or the hoist mechanism itself were to fail. Under normal hoisting conditions, the gravity brake of the invention is subject to an upward lifting force from the hoist and a downward pulling force from a suspended load. If the lifting force should suddenly cease, the loss of differential forces on the gravity brake in free-fall is translated to extend a set of brakes against the walls of the shaft to stop the free fall descent of the gravity brake and attached load.

Lujan, Richard E. (Santa Fe, NM)

2001-01-01T23:59:59.000Z

3

Braking system  

DOE Patents [OSTI]

A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling means causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

Norgren, D.U.

1982-09-23T23:59:59.000Z

4

Contactless magnetic brake for automotive applications  

E-Print Network [OSTI]

consumption due to power assistance, and requirement for anti-lock controls. To solve these problems, a contactless magnetic brake has been developed. This concept includes a novel flux-shunting structure to control the excitation flux generated by permanent...

Gay, Sebastien Emmanuel

2009-05-15T23:59:59.000Z

5

Vehicle brake testing system  

DOE Patents [OSTI]

This invention relates to a force measuring system capable of measuring forces associated with vehicle braking and of evaluating braking performance. The disclosure concerns an invention which comprises a first row of linearly aligned plates, a force bearing surface extending beneath and beside the plates, vertically oriented links and horizontally oriented links connecting each plate to a force bearing surface, a force measuring device in each link, a transducer coupled to each force measuring device, and a computing device coupled to receive an output signal from the transducer indicative of measured force in each force measuring device. The present invention may be used for testing vehicle brake systems.

Stevens, Samuel S. (Harriman, TN); Hodgson, Jeffrey W. (Lenoir City, TN)

2002-11-19T23:59:59.000Z

6

Combined hydraulic and regenerative braking system  

DOE Patents [OSTI]

A combined hydraulic and regenerative braking system and method for an electric vehicle, with the braking system being responsive to the applied hydraulic pressure in a brake line to control the braking of the vehicle to be completely hydraulic up to a first level of brake line pressure, to be partially hydraulic at a constant braking force and partially regenerative at a linearly increasing braking force from the first level of applied brake line pressure to a higher second level of brake line pressure, to be partially hydraulic at a linearly increasing braking force and partially regenerative at a linearly decreasing braking force from the second level of applied line pressure to a third and higher level of applied line pressure, and to be completely hydraulic at a linearly increasing braking force from the third level to all higher applied levels of line pressure.

Venkataperumal, Rama R. (Troy, MI); Mericle, Gerald E. (Mount Clemens, MI)

1981-06-02T23:59:59.000Z

7

Full Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road User AssessmentNREL is aBraking

8

Regenerative braking device  

DOE Patents [OSTI]

Disclosed are several embodiments of a regenerative braking device for an automotive vehicle. The device includes a plurality of rubber rollers (24, 26) mounted for rotation between an input shaft (14) connectable to the vehicle drivetrain and an output shaft (16) which is drivingly connected to the input shaft by a variable ratio transmission (20). When the transmission ratio is such that the input shaft rotates faster than the output shaft, the rubber rollers are torsionally stressed to accumulate energy, thereby slowing the vehicle. When the transmission ratio is such that the output shaft rotates faster than the input shaft, the rubber rollers are torsionally relaxed to deliver accumulated energy, thereby accelerating or driving the vehicle.

Hoppie, Lyle O. (Birmingham, MI)

1982-01-12T23:59:59.000Z

9

Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues  

E-Print Network [OSTI]

Speciation of Sb in airborne particulate matter, vehicle brake linings, and brake pad wear residues: XAS XANES EXAFS Antimony Particulate matter Brake linings a b s t r a c t Insights into the speciation of Sb in samples of brake linings, brake pad wear residues, road dust, and atmospheric particulate

Short, Daniel

10

Variable ratio regenerative braking device  

DOE Patents [OSTI]

Disclosed is a regenerative braking device (10) for an automotive vehicle. The device includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (36) and an output shaft (42), clutches (38, 46) and brakes (40, 48) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. The rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft is clutched to the transmission while the brake on the output shaft is applied, and are torsionally relaxed to deliver energy to the vehicle when the output shaft is clutched to the transmission while the brake on the input shaft is applied. The transmission ratio is varied to control the rate of energy accumulation and delivery for a given rotational speed of the vehicle drivetrain.

Hoppie, Lyle O. (Birmingham, MI)

1981-12-15T23:59:59.000Z

11

Commercial Motor Vehicle Brake Assessment Tools  

E-Print Network [OSTI]

Commercial Motor Vehicle Brake Assessment Tools Commercial Motor Vehicle Roadside Technology to deceleration in g's ­ Passing score: BE43.5 · Enforcement tool for only 3 years. · Based solely on brake Brake Research · CMVRTC research built on these enforcement tools ­ Correlation Study ­ Level-1 / PBBT

12

Brake blending strategy for a hybrid vehicle  

DOE Patents [OSTI]

A hybrid electric powertrain system is provided including a transmission for driving a pair of wheels of a vehicle and a heat engine and an electric motor/generator coupled to the transmission. A friction brake system is provided for applying a braking torque to said vehicle. A controller unit generates control signals to the electric motor/generator and the friction brake system for controllably braking the vehicle in response to a drivers brake command. The controller unit determines and amount of regenerative torque available and compares this value to a determined amount of brake torque requested for determining the control signals to the electric motor/generator and the friction brake system.

Boberg, Evan S. (Hazel Park, MI)

2000-12-05T23:59:59.000Z

13

Disturbance Control of the Hydraulic Brake in a Wind Turbine  

E-Print Network [OSTI]

Disturbance Control of the Hydraulic Brake in a Wind Turbine Frank Jepsen, Anders Søborg brake in a wind turbine. Brake torque is determined by friction coefficient and clamp force; the latter brake is one1 of the two independent brake systems in a wind turbine. As a consequence of the gearing

Yang, Zhenyu

14

TMV Technology Capabilities Brake Stroke Monitor  

E-Print Network [OSTI]

TMV Technology Capabilities Brake Stroke Monitor Brake monitoring systems are proactive maintenance This technology allows for CMV operators to have knowledge of their steer, drive, and tandem axle group weights setup is required. Current Safety/Enforcement Technologies EOBR (electronic on-board recorder) On

15

Brake Defect Causation and Abatement Study (BDCAS)  

E-Print Network [OSTI]

Brake Defect Causation and Abatement Study (BDCAS) Oak Ridge National Laboratory managed by UT corrective actions and validate true abatement of initial out-of- service causation the FMCSA began the BDCAS

16

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

17

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

18

Electric vehicle regenerative antiskid braking and traction control system  

DOE Patents [OSTI]

An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensors and determining if regenerative antiskid braking control, requiring hydrualic braking control, or requiring traction control are required. The processor then employs a control strategy based on the determined vehicle state and provides command signals to a motor controller to control the operation of the electric traction motor and to a brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative antiskid braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1995-01-01T23:59:59.000Z

19

Electric vehicle regenerative antiskid braking and traction control system  

DOE Patents [OSTI]

An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensors and determining if regenerative antiskid braking control, requiring hydraulic braking control, or requiring traction control are required. The processor then employs a control strategy based on the determined vehicle state and provides command signals to a motor controller to control the operation of the electric traction motor and to a brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative antiskid braking control, hydraulic braking control, and traction control. 10 figs.

Cikanek, S.R.

1995-09-12T23:59:59.000Z

20

Thermal cracking in disc brakes Thomas J. Mackin *,1  

E-Print Network [OSTI]

Thermal cracking in disc brakes Thomas J. Mackin *,1 , Steven C. Noe, K.J. Ball, B.C. Bedell, D, or hub, which is connected to the wheel and axle, and an inboard and outboard braking surface

Salvaggio, Carl

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Why Brake-By-Wire (BBW) ? Advantages of BBW  

E-Print Network [OSTI]

Conventional Brake System http://www.conti-online.com #12;BBW Survey [ SKF (Motor + PGT +Ball Screw)] [ DELPHI (Motor + PGT +Ball Screw)] [Continental Teves (Motor + PGT + Roller Screw)] [Continental Teves installed at wheel] #12;Sectional Drawing of the Electromechanically Actuated Disk Brake From ITT Brake Pads Caliper

Yao, Bin

22

The effect of friction on drum brakes  

SciTech Connect (OSTI)

The boundary element method (BEM) has been developed for a long period of time. Cruse and Wilson developed an isoparametric quadratic element. Rizzo, Cruse, Rizzo and Shippy, and Swedlow and cruse applied the method to various problems. It shows that the BEM can provide a very good analytical result in the linear problem and it can reduce time in preparation of numerical data. Watson and Newcomb pointed out that the pressure distribution on the contact surface of the brake drum and the lining plate do not vary significantly along the axis. The deflection can be reduced by an appropriate design of the web; therefore, two dimensional analysis with the BEM is used in this analysis. Based on the authors` knowledge, this is the first paper to analyze the drum brake by using the BEM. The assumptions are the brake drum to be a rigid body, perfect interface contact between the drum and the shoe, the constant friction coefficient of the friction material and the thermal effect to be neglected. The two dimensional equations are derived based on the Somigliana`s identity. Since there is no shape function and no need of the Jacobin for the coordinate transform, to integrate numerically is easier and to write a computer code is simpler for the constant value element than the second order element. The linear element is inappropriate to treat the comer problem. Using the linear elements or second order elements creates discontinuous phenomena along the irregular boundary. The common nodal point has different normal vector and boundary conditions. It is necessary to have an extra equation to provide a unique solution for the final linear equation. Using the constant value element can get rid of this problem. The effect of the friction on the pressure distribution at the friction interface is studied. The calculated results of the pressure distribution are compared with the available data. The mathematical model can be used as a design tool to predict the performance of drum brakes.

Huang, Y.M.; Shyr, J.S. [National Taiwan Univ. (China)

1995-12-31T23:59:59.000Z

23

Airborne wear particles railway research group FEM Simulation of train disc brake behavior  

E-Print Network [OSTI]

1 Airborne wear particles railway research group FEM Simulation of train disc brake behavior a modern train disc brake with brake caliper and high speed pads. During braking, a considerable amount. A model of train brake caliper Aim The overall aim of the MSc degree project is to develop a thermoelastic

Haviland, David

24

E-Print Network 3.0 - antiskid braking system Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Idar Petersen2 Summary: -lock brake systems ABS control the brake torque of each wheel to prevent it from getting locked... in the process of braking. This is important to...

25

Pulsar Braking Index and Mass Accretion  

E-Print Network [OSTI]

I show that the braking index, $N$, a fundamental pulsar experimental quantity, naturally differs from the canonical value of 3 by terms which involve mass accretion. Using the measured values of $N$ for PSR1509-58 and PSR0531+21, I determine that for constant density neutron stars their present mass accretion rates are $(3.10\\pm.51)\\times10^{-5}$ M year$^{-1}$ and $(9.946\\pm.089)\\times10^{-5}$ M year$^{-1}$ respectively, where M is the mass of each pulsar. Finally, I demonstrate that mass accretion removes the outstanding problem of the origin of the big glitches of the Vela Pulsar.

P. D. Morley

1993-11-15T23:59:59.000Z

26

Do Si stars undergo any magnetic braking?  

E-Print Network [OSTI]

The old question of rotational braking of Ap Si stars is revisited on the empirical side, taking advantage of the recent Hipparcos results. Field stars with various evolutionary states are considered, and it is shown that the loose correlation between their rotational period and their surface gravity is entirely compatible with conservation of angular momentum. No evidence is found for any loss of angular momentum on the Main Sequence, which confirms earlier results based on less reliable estimates of surface gravity. The importance of reliable, fundamental Teff determinations of Bp and Ap stars is emphasized.

P. North

1998-02-23T23:59:59.000Z

27

E-Print Network 3.0 - antilock brake systems Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

such as trucks, tractor... -trailers and buses. In these brake systems, compressed air is used as the energy transmitting medium to actuate... the foundation brakes mounted...

28

A diagnostic system for air brakes in commercial vehicles  

E-Print Network [OSTI]

to maintenance and hence they require frequent inspections. Current inspection techniques require an inspector to go underneath a vehicle to check the brake system for possible faults, such as leaks, worn brake pads, out-of-adjustment of push rods, etc...

Coimbatore Subramanian, Shankar Ram

2007-09-17T23:59:59.000Z

29

Development of Diagnostic Algorithms for Air Brakes in Trucks  

E-Print Network [OSTI]

causes a reduction in the steady-state pressure in the brake chamber and an increase in the lag of the braking pressure response thereby increasing the stopping distance of the vehicle. Currently a presence of leak in the system is detected...

Dhar, Sandeep

2011-10-21T23:59:59.000Z

30

A pressure control scheme for air brakes in commercial vehicles  

E-Print Network [OSTI]

This research is focused on developing a control scheme for regulating the pressure in the brake chamber of an air brake system found in most commercial vehicles like trucks, tractor-trailers and buses. Such a control scheme can be used...

Bowlin, Christopher Leland

2007-04-25T23:59:59.000Z

31

Braking system for use with an arbor of a microscope  

DOE Patents [OSTI]

A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling device causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

Norgren, Duane U. (Orinda, CA)

1984-01-01T23:59:59.000Z

32

Regenerative braking on bicycles to power LED safety flashers  

E-Print Network [OSTI]

This work develops a method for capturing some of the kinetic energy ordinarily lost during braking on bicycles to power LED safety flashers. The system is designed to eliminate: (a) battery changing in popular LED flashers, ...

Collier, Ian M

2005-01-01T23:59:59.000Z

33

Asbestos-free brake-lining materials for hydrogenerators  

SciTech Connect (OSTI)

Three different asbestos-free materials currently considered as new lining materials for hydrogenerator brakes were tested and compared to the original asbestos lining. Results show that these substitutes not only vary greatly from the original material in terms of mechanical properties and physical characteristics but also exhibit significantly different performances in braking tests. Consequently, these new materials are not entirely suitable for the intended application.

Lalonde, S.; Lanteigne, J. [Hydro-Quebec, Varennes, Quebec (Canada)

1995-11-01T23:59:59.000Z

34

Investigation of aerodynamic braking devices for wind turbine applications  

SciTech Connect (OSTI)

This report documents the selection and preliminary design of a new aerodynamic braking system for use on the stall-regulated AWT-26/27 wind turbines. The goal was to identify and design a configuration that offered improvements over the existing tip brake used by Advanced Wind Turbines, Inc. (AWT). Although the design objectives and approach of this report are specific to aerodynamic braking of AWT-26/27 turbines, many of the issues addressed in this work are applicable to a wider class of turbines. The performance trends and design choices presented in this report should be of general use to wind turbine designers who are considering alternative aerodynamic braking methods. A literature search was combined with preliminary work on device sizing, loads and mechanical design. Candidate configurations were assessed on their potential for benefits in the areas of cost, weight, aerodynamic noise, reliability and performance under icing conditions. As a result, two configurations were identified for further study: the {open_quotes}spoiler-flap{close_quotes} and the {open_quotes}flip-tip.{close_quotes} Wind tunnel experiments were conducted at Wichita State University to evaluate the performance of the candidate aerodynamic brakes on an airfoil section representative of the AWT-26/27 blades. The wind tunnel data were used to predict the braking effectiveness and deployment characteristics of the candidate devices for a wide range of design parameters. The evaluation was iterative, with mechanical design and structural analysis being conducted in parallel with the braking performance studies. The preliminary estimate of the spoiler-flap system cost was $150 less than the production AWT-26/27 tip vanes. This represents a reduction of approximately 5 % in the cost of the aerodynamic braking system. In view of the preliminary nature of the design, it would be prudent to plan for contingencies in both cost and weight.

Griffin, D.A. [R. Lynette & Associates, Seattle, WA (United States)

1997-04-01T23:59:59.000Z

35

Magnetic braking of T Tauri stars  

E-Print Network [OSTI]

We construct models for the rotation rates of T Tauri stars whose spin is regulated by magnetic linkage between the star and a surrounding accretion disc. Our models utilise a time-dependent disc code to follow the accretion process and include the effects of pre-main-sequence stellar evolution. We find that the initial disc mass controls the evolution of the star-disc system. For sufficiently massive discs, a stellar field of $\\sim$ 1 kG is able to regulate the spin rate to the observed values during the classical T Tauri phase. The field then acts to expel the disc and the star spins up at constant angular momentum as a weak-line system. Lower mass discs are ejected at an early epoch and fail to brake the star significantly. We extend the model to close binary systems, and find that the removal of angular momentum from the disc by the secondary significantly prolongs the inner disc lifetime. Such systems should therefore be relatively slow rotators. We also discuss the implications of our model for the spectral energy distributions and variability of T Tauri stars.

P. J. Armitage; C. J. Clarke

1995-12-05T23:59:59.000Z

36

Regenerative braking device with rotationally mounted energy storage means  

DOE Patents [OSTI]

A regenerative braking device for an automotive vehicle includes an energy storage assembly (12) having a plurality of rubber rollers (26, 28) mounted for rotation between an input shaft (30) and an output shaft (32), clutches (50, 56) and brakes (52, 58) associated with each shaft, and a continuously variable transmission (22) connectable to a vehicle drivetrain and to the input and output shafts by the respective clutches. In a second embodiment the clutches and brakes are dispensed with and the variable ratio transmission is connected directly across the input and output shafts. In both embodiments the rubber rollers are torsionally stressed to accumulate energy from the vehicle when the input shaft rotates faster or relative to the output shaft and are torsionally relaxed to deliver energy to the vehicle when the output shaft rotates faster or relative to the input shaft.

Hoppie, Lyle O. (Birmingham, MI)

1982-03-16T23:59:59.000Z

37

Fuzzy logic electric vehicle regenerative antiskid braking and traction control system  

DOE Patents [OSTI]

An regenerative antiskid braking and traction control system using fuzzy logic for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensor and determining if regenerative antiskid braking control, requiring hydraulic braking control, and requiring traction control are required. The processor then employs fuzzy logic based on the determined vehicle state and provides command signals to a motor controller to control operation of the electric traction motor and to the brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative braking control, hydraulic braking control, and traction control. 123 figs.

Cikanek, S.R.

1994-10-25T23:59:59.000Z

38

Evaluation of driver braking performance to an unexpected object in the roadway  

E-Print Network [OSTI]

components, specifically whether the equation accurately reflects driver and vehicle behaviors during a braking maneuver. This research evaluated the two components of the SSD equation. Four field studies were conducted that evaluated driver braking...

Picha, Dale Louis

1994-01-01T23:59:59.000Z

39

Control Engineering Practice 11 (2003) 163170 A mechatronic conception of a new intelligent braking system  

E-Print Network [OSTI]

, residual friction, noise, vibrations, a new brake has been designed according to a modular principle which describes a new intelligent braking system for motor vehicles. A mechatronic approach helped to avoid some

Paris-Sud XI, Université de

40

Fuzzy logic electric vehicle regenerative antiskid braking and traction control system  

DOE Patents [OSTI]

An regenerative antiskid braking and traction control system using fuzzy logic for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensor and determining if regenerative antiskid braking control, requiring hydraulic braking control, and requiring traction control are required. The processor then employs fuzzy logic based on the determined vehicle state and provides command signals to a motor controller to control operation of the electric traction motor and to the brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Evaluation of Corrosion Failure in Tractor-Trailer Brake System  

SciTech Connect (OSTI)

As reported to ORNL, concomitant with the introduction of different deicing and anti-icing compounds, there was an increase in the brake failure rate of tractor-trailer trucks. A forensic evaluation of a failed brake system was performed. Optical and scanning electron microscopic evaluation showed corrosion to be mostly confined to the brake table/lining interface. The corrosion is non-uniform as is to be expected for plain carbon steel in chloride environments. This initial analysis found no evidence for the chlorides of calcium and magnesium, which are the newly introduced deicing and antiicing compounds and are less soluble in water than the identified chlorides of sodium and potassium, in the scale. The result could be as a result of non-exposure of the examined brake table to calcium and magnesium chloride. The mechanisms for the increased failure rate are postulated as being an increased rate of corrosion due to positive shifts in the corrosion potential, and an increased amount of corrosion due to an increased ''time of wetness'' that results from the presence of hygroscopic salts. Laboratory scale evaluation of the corrosion of plain carbon steel in simulated deicing and anti-icing solutions need to be performed to determine corrosion rates and morphological development of corrosion product, to compare laboratory data to in-service data, and to rank economically feasible replacement materials for low carbon steel. In addition, the mechanical behavior of the lining attached to the brake shoe table needs to be assessed. It is opined that an appropriate adjustment of materials could easily allow for a doubling of a brake table/lining lifetime. Suggestions for additional work, to clarify the mechanisms of rust jacking and to develop possible solutions, are described.

Wilson, DF

2002-10-22T23:59:59.000Z

42

E-Print Network 3.0 - air brake association Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

... Source: Southwest Region University Transportation Center Collection: Engineering ; Energy Storage, Conversion and Utilization 2 Commercial Motor Vehicle Brake Assessment...

43

Airbus A320 Braking as Predicate-Action Peter B. Ladkin  

E-Print Network [OSTI]

Airbus A320 Braking as Predicate-Action Diagrams Peter B. Ladkin Universitat Bielefeld, Technische of the Airbus A320 braking systems contained in the Flight Crew Operating Manual. This helps identify to interest us and others in the design of the A320 braking system [FI.93a, FI.93b, FI.93c]. This paper

Ladkin, Peter B.

44

Adaptive Rollover Prevention for Automotive Vehicles with Differential Braking  

E-Print Network [OSTI]

Adaptive Rollover Prevention for Automotive Vehicles with Differential Braking Selim Solmaz, switching, and tuning (MMST) paradigm [13, 14, 15] for preventing un­tripped rollover in automotive vehicles performance than its fixed robust counterpart. Keywords: Automotive control; Multiple models; Parameter

Duffy, Ken

45

Many applications require brakes, for instance to decelerate or to  

E-Print Network [OSTI]

an error occurs in the process of a robotic arm. The energy consumption and actuation force of these brakes is very high. A team of TU Delft scientists developed a method to reduce the energy consumption. The energy consumption is high because an actuator has to generate a normal force between two friction

46

Oxygen-Diffused Titanium as a Candidate Brake Rotor Material  

SciTech Connect (OSTI)

Titanium alloys are one of several candidate materials for the next generation of truck disk brake rotors. Despite their advantages of lightweight relative to cast iron and good strength and corrosion resistance, titanium alloys are unlikely to be satisfactory brake rotor materials unless their friction and wear behavior can be significantly improved. In this study, a surface engineering process oxygen diffusion was applied to titanium rotors and has shown very encouraging results. The oxygen diffused Ti-6Al-4V (OD-Ti) was tested on a sub-scale brake tester against a flat block of commercial brake lining material and benchmarked against several other Ti-based materials, including untreated Ti-6Al-4V, ceramic particle-reinforced Ti composites (MMCs), and a thermal-spray-coated Ti alloy. With respect to friction, the OD-Ti outperformed all other candidate materials under the imposed test conditions with the friction coefficient remaining within a desirable range of 0.35-0.50, even under the harshest conditions when the disk surface temperature reached nearly 600 ?C. In addition, the OD-Ti showed significantly improved wear-resistance over the non-treated one and was even better than the Ti-based composite materials.

Qu, Jun [ORNL; Blau, Peter Julian [ORNL; Jolly, Brian C [ORNL

2009-01-01T23:59:59.000Z

47

aircraft brake materials: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

brake materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 26 REDUCTION OF CADMTUM PLATING ON...

48

Braking index of isolated pulsars: open questions and ways forward  

E-Print Network [OSTI]

Isolated pulsars are rotating neutron stars with accurately measured angular velocities $\\Omega$, and their time derivatives which show unambiguously that the pulsars are slowing down. Although the exact mechanism of the spin-down is a question of debate, the commonly accepted view is that it arises either through emission of magnetic dipole radiation (MDR) from a rotating magnetized body, through emission of a relativistic particle wind, or via higher order magnetic multipole or gravitational quadrupole radiation. The calculated energy loss by a rotating pulsar is model dependent and leads to the power law $\\dot{\\Omega}$ = -K $\\Omega^{\\rm n}$ where $n$ is called the braking index. The theoretical value for braking index is $n = 1, 3, 5$ for wind, MDR, quadrupole radiation respectively. The accepted view is that pulsar braking is strongly dominated by MDR. Highly precise observations of isolated pulsars yield braking index values in the range $1 < n < 2.8$ which are consistently less than the value pred...

Hamil, Oliver

2015-01-01T23:59:59.000Z

49

TOWARDS GLOBAL CHASSIS CONTROL BY INTEGRATING THE BRAKE AND  

E-Print Network [OSTI]

. Szab´o*, J. Bokor*, C. Poussot-Vassal**, O. Sename**, L. Dugard** *Computer and Automation Research active suspensions and an active brake is proposed to improve the safety of vehicles. The design is based of the method is demonstrated through a complex simulation example containing vehicle maneuvers. Keywords: LPV

Paris-Sud XI, Université de

50

Heavy and Overweight Vehicle Brake Testing: Five-Axle Combination Tractor-Flatbed Final Report  

SciTech Connect (OSTI)

The Federal Motor Carrier Safety Administration, in coordination with the Federal Highway Administration, sponsored the Heavy and Overweight Vehicle Brake Testing (HOVBT) program in order to provide information about the effect of gross vehicle weight (GVW) on braking performance. Because the Federal Motor Carrier Safety Regulations limit the number of braking system defects that may exist for a vehicle to be allowed to operate on the roadways, the examination of the effect of brake defects on brake performance for increased loads is also relevant. The HOVBT program seeks to provide relevant information to policy makers responsible for establishing load limits, beginning with providing test data for a combination tractor/trailer. This testing was conducted on a five-axle combination vehicle with tractor brakes meeting the Reduced Stopping Distance requirement rulemaking. This report provides a summary of the testing activities, the results of various analyses of the data, and recommendations for future research. Following a complete brake rebuild, instrumentation, and brake burnish, stopping tests were performed from 20 and 40 mph with various brake application pressures (15 psi, 25 psi, 35 psi, 45 psi, 55 psi, and full system pressure). These tests were conducted for various brake conditions at the following GVWs: 60,000, 80,000, 91,000, 97,000, 106,000, and 116,000 lb. The 80,000-lb GVWs included both balanced and unbalanced loads. The condition of the braking system was also varied. To introduce these defects, brakes (none, forward drive axle, or rear trailer axle) were made inoperative. In addition to the stopping tests, performance-based brake tests were conducted for the various loading and brake conditions. Analysis of the stopping test data showed the stopping distance to increase with load (as expected) and also showed that more braking force was generated by the drive axle brakes than the trailer axle brakes. The constant-pressure stopping test data revealed a linear relationship between brake application pressure and was used to develop an algorithm to normalize stopping data for weight and initial speed.

Lascurain, Mary Beth [ORNL; Capps, Gary J [ORNL; Franzese, Oscar [ORNL

2013-10-01T23:59:59.000Z

51

Energy Efficiency in Heavy Vehicle Tires, Drivetrains, and Braking Systems  

SciTech Connect (OSTI)

This document was prepared to support the primary goals of the Department of Energy, Office of Heavy Vehicle Technologies. These were recently stated as follows: ''Develop by 2004 the enabling technologies for a class 7-8 truck with a fuel efficiency of 10 mpg (at 65 mph) which will meet prevailing emission standards. For Class 3-6 trucks operating on an urban driving cycle, develop by 2004 commercially viable vehicles that achieve at least double the fuel economy of comparable current vehicles (1999), and as a research goal, reduce criteria pollutants to 30% below EPA standards. Develop by 2004 the diesel engine enabling technologies to support large-scale industry dieselization of Class 1 and 2 trucks, achieving a 35 % fuel efficiency improvement over comparable gasoline-fueled trucks, while meeting applicable emissions standards.'' The enabling technologies for improving the fuel efficiency of trucks, include not only engine technologies but also technologies involved with lowering the rolling resistance of tires, reducing vehicle aerodynamic drag, improving thermal management, and reducing parasitic frictional losses in drive train components. Opportunities also exist for making better use of the energy that might ordinarily be dissipated during vehicle braking. Braking systems must be included in this evaluation since safety in truck operations is vital, and braking requirements are greater for vehicles having lowered resistance to rolling. The Office of Heavy Vehicle Technologies has initiated a program to improve the aerodynamics of heavy vehicles through wind tunnel testing, computational modeling, and on-road evaluations. That activity is described in a separate multi-year plan; therefore, emphasis in this document will be on tires, drive trains, and braking systems. Recent, dramatic fluctuations in diesel fuel prices have emphasized the importance of effecting savings in truck fuel economy by implementing new component designs and materials.

Peter J. Blau

2000-04-26T23:59:59.000Z

52

E-Print Network 3.0 - automotive drum brakes Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biochemistry, Georgia Institute of Technology Collection: Chemistry 3 Commercial Motor Vehicle Brake Assessment Tools Summary: System Visual determination of potentially unsafe...

53

E-Print Network 3.0 - air brakes Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

... Source: Oak Ridge National Laboratory, Center for Transportation Analysis Collection: Energy Storage, Conversion and Utilization 2 CMV Brake Wear and Performance Test Little is...

54

E-Print Network 3.0 - automotive brake materials Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

such as trucks, tractor... -trailers and buses. In these brake systems, compressed air is used as the energy transmitting medium to ... Source: Southwest Region University...

55

Plant and Environment Interactions Arsenic Accumulation in the Hyperaccumulator Chinese Brake and Its Utilization  

E-Print Network [OSTI]

in a greenhouse. At recently, however, has Chinese brake (Pteris vittata L.)harvest, the Chinese brake produced soils (0.47­7.56 mg As kg 1 ),concentration to water-soluble arsenic in soil) of 1450 and a transloca to remediate arsenic contaminated soils. schullat, 2000), soil arsenic concentration (Jiang and Singh, 1994

Ma, Lena

56

Integrated vehicle dynamics control via coordination of active front steering and rear braking  

E-Print Network [OSTI]

Integrated vehicle dynamics control via coordination of active front steering and rear brakingComputer and Automation Research Institue, Hungarian Academy of Sciences, Kende u. 13-17, H-1111, Budapest, Hungary, Email front steering and rear braking in a driver- assist system for vehicle yaw control. The proposed control

Paris-Sud XI, Université de

57

Vehicle yaw control via coordinated use of steering/braking systems  

E-Print Network [OSTI]

Vehicle yaw control via coordinated use of steering/braking systems M. Doumiati, O. Sename, J.sename@gipsa-lab.grenoble-inp.fr) Computer and Automation Research Institute, Hungarian Academy of Sciences, Kende u. 13-17, H-1111, Budapest with steer- ing/braking coordination task for vehicle yaw control. For steerability enhancement, only active

Paris-Sud XI, Université de

58

Modeling the pneumatic relay valve of an s-cam air brake  

E-Print Network [OSTI]

- niques. The design of a model-based diagnostic system requires the development and experimental corroboration of a mathematical model of the evolution of pressure in each brake chamber of a truck in response to the application of brake pedal input...

Vilayannur Natarajan, Shankar

2005-08-29T23:59:59.000Z

59

Modeling the pneumatic subsystem of a S-cam air brake system  

E-Print Network [OSTI]

The air brake system is one of the critical components in ensuring the safe operation of any commercial vehicle. This work is directed towards the development of a fault-free model of the pneumatic subsystem of the air brake system. This model can...

Coimbatore Subramanian, Shankar

2004-09-30T23:59:59.000Z

60

Fault tolerant control of automatically controlled vehicles in response to brake system failures  

E-Print Network [OSTI]

in the brake system is vital. In this thesis, nonlinear failure detection filters are used for fault detection of sensors and actuators in a class of nonlinear systems. In this thesis, the effects of brake system failures in an AHS where the vehicle steering...

Hsien, Li-Wei

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Emission Factor for Antimony in Brake Abrasion Dusts as One of the  

E-Print Network [OSTI]

originating from automobiles. Abrasion dusts from commercially available brake pads (nonasbestos organic type factors originating from automobiles were approximately 32 µg Sb/braking/car for PM10 and 22 µg Sb of automobiles to the atmospheric Sb concen- tration. The emission factors of pollutants from automobiles have

Short, Daniel

62

Wind turbine trailing-edge aerodynamic brake design  

SciTech Connect (OSTI)

This report describes the design of a centrifugally actuated aerodynamic-overspeed device for a horizontal-axis wind turbine. The device will meet the following criteria; (1) It will be effective for airfoil angles of attack 0{degrees} to 45{degrees}. (2) It will be stowed inside the blade profile prior to deployment. (3) It will be capable of offsetting the positive torque produced by the overall blade. (4) Hinge moments will be minimized to lower actuator loads and cost. (5) It will be evaluated as a potential power modulating active rotor-control system. A literature review of aerodynamic braking devices was conducted. Information from the literature review was used to conceptualize the most effective devices for subsequent testing and design. Wind-tunnel test data for several braking devices are presented in this report. Using the data for the most promising configuration, a preliminary design was developed for a MICON 65/13 wind turbine with Phoenix 7.9-m rotor blades.

Quandt, G.

1996-01-01T23:59:59.000Z

63

Preliminary survey report: control technology for brake lining at Northwest Local School District, Cincinnati, Ohio  

SciTech Connect (OSTI)

A walk-through survey of control technology for reducing asbestos exposure during maintenance and repair of vehicular brakes was conducted at Northwest Local School District, Cincinnati, Ohio in January, 1986. The primary method for controlling and collecting dust during brake servicing was a wet-washing technique and good work practices, ensuring that exposure to hazardous physical or chemical agents was reduced or eliminated. Also available was an enclosed-type brake assembly cleaner designed to be connected to the shop air and a vacuum system. The brake assembly cleaner did not have a viewing port to examine the area being cleaned. The operator had to remove the unit to inspect the cleaned area potentially exposing himself to any dust remaining on the brake shoes or hub. The unit itself was a potential dust source as it was designed to fit 16-inch wheels and did not form a tight seal on the smaller 15-inch wheels of the newer buses. The authors conclude that the wet wash technique is an excellent method for controlling asbestos emissions during brake maintenance. The vacuum brake-assembly cleaner is inadequate and potentially hazardous. An in-depth survey of the wet technique is recommended.

Cooper, T.C.; McGlothlin, J.D.; Godbey, F.W.; Sheehy, J.W.; O'Brien, D.M.

1986-05-01T23:59:59.000Z

64

Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine  

E-Print Network [OSTI]

, the characteristics of combustion for swept injection timings along the maximum brake torque plateau are determined. The research is conducted by varying injection timing at constant engine speed and load while measuring engine emissions and in-cylinder pressure...

Kroeger, Timothy H

2013-09-19T23:59:59.000Z

65

E-Print Network 3.0 - automotive brake disc Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Please cite this article in press as: F. Massi, et al., Contact surface topography and system dynamics of brake squeal, Wear (2008), Summary: for future work. 487 References 488...

66

E-Print Network 3.0 - automotive disc brakes Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Please cite this article in press as: F. Massi, et al., Contact surface topography and system dynamics of brake squeal, Wear (2008), Summary: for future work. 487 References 488...

67

A mathematical model for air brake systems in the presence of leaks  

E-Print Network [OSTI]

A MATHEMATICAL MODEL FOR AIR BRAKE SYSTEMS IN THE PRESENCE OF LEAKS A Thesis by SRIVATSAN RAMARATHNAM Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 2008 Major Subject: Mechanical Engineering A MATHEMATICAL MODEL FOR AIR BRAKE SYSTEMS IN THE PRESENCE OF LEAKS A Thesis by SRIVATSAN RAMARATHNAM Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

Ramaratham, Srivatsan

2008-10-10T23:59:59.000Z

68

Braking index of isolated uniformly rotating magnetized pulsars  

E-Print Network [OSTI]

Isolated pulsars are rotating neutron stars with accurately measured angular velocities $\\Omega$, and their time derivatives which show unambiguously that the pulsars are slowing down. Although the exact mechanism of the spin-down is a question of debate in detail, the commonly accepted view is that it arises through emission of magnetic dipole radiation (MDR) from a rotating magnetized body. Other processes, including the emission of gravitational radiation, and of relativistic particles (pulsar wind), are also being considered. The calculated energy loss by a rotating pulsar with a constant moment of inertia is assumed proportional to a model dependent power of $\\Omega$. This relation leads to the power law $\\dot{\\Omega}$ = -K $\\Omega^{\\rm n}$ where $n$ is called the braking index. The MDR model predicts $n$ exactly equal to 3. Selected observations of isolated pulsars provide rather precise values of $n$, individually accurate to a few percent or better, in the range 1$ <$ n $ < $ 2.8, which is consi...

Hamil, Oliver; Urbanec, Martin; Urbancova, Gabriela

2015-01-01T23:59:59.000Z

69

Preliminary survey report: evaluation of brake-drum service controls at Pennsylvania Bureau of Vehicle Management, Vehicle Maintenance Division, Harrisburg, Pennsylvania  

SciTech Connect (OSTI)

Exposure to asbestos during the servicing of brakes on state-owned vehicles at the Bureau of Vehicle Management Maintenance Division, Harrisburg, Pennsylvania, was investigated as part of a study of control technologies. Brakes had been serviced at this garage facility for the previous year using a BCE-1000 Clayton brake-cleaning unit, sized for cars, vans, and pickups. The brake-cleaning unit consisted of a transparent enclosure hood and a HEPA vacuum filter dust collector, designed to contain and collect all brake-lining dust during vehicular brake maintenance and replacement. The authors conclude that the Clayton BCE-1000 dust-control unit appeared to be effective in containing and collecting brake dust during all vehicular brake maintenance and replacement jobs in this situation.

Van Wagenen, H.D.

1987-03-01T23:59:59.000Z

70

On The Use of Eddy Current Brakes as Tunable, Fast Turn-On Viscous Dampers For Haptic Rendering  

E-Print Network [OSTI]

On The Use of Eddy Current Brakes as Tunable, Fast Turn-On Viscous Dampers For Haptic Rendering, linear dampers for haptic rendering using a prototype haptic device outfitted with eddy current brakes discuss the results from haptic experiments for rendering viscosity, virtual walls and virtual friction

Hayward, Vincent

71

Neutron scattering residual stress measurements on gray cast iron brake discs  

SciTech Connect (OSTI)

Neutron diffraction was used to investigate the effects of a heat treatment designed to remove internal residual stresses in brake discs. It is believed that residual stresses may change the rate of deformation of the discs during severe braking conditions when the disc temperature is increased significantly. Neutron diffraction was used to map out residual strain distributions in a production disc before and after a stress-relieving heat treatment. Results from these neutron diffraction experiments show that some residual strains were reduced by as much as 400 microstrain by stress relieving. 5 refs., 5 figs., 1 tab.

Spooner, S.; Payzant, E.A.; Hubbard, C.R. [and others

1996-11-01T23:59:59.000Z

72

REPORT on the TRUCK BRAKE LINING WORKSHOP and FLEET OPERATORS' SURVEY  

SciTech Connect (OSTI)

The report summarizes what transpired during brake linings-related workshop held at the Fall 2003 meeting of the Technology and Maintenance Council (TMC) in Charlotte, NC. The title of the workshop was ''Developing a Useful Friction Material Rating System''. It was organized by a team consisting of Peter Blau (Oak Ridge National Laboratory), Jim Britell (National Highway Traffic Safety Administration), and Jim Lawrence (Motor and Equipment Manufacturers Association). The workshop was held under the auspices of TMC Task Force S6 (Chassis), chaired by Joseph Stianche (Sanderson Farms, Inc.). Six invited speakers during the morning session provided varied perspectives on testing and rating aftermarket automotive and truck brake linings. They were: James R. Clark, Chief Engineer, Foundation Brakes and Wheel Equipment, Dana Corporation, Spicer Heavy Axle and Brake Division; Charles W. Greening, Jr, President, Greening Test Labs; Tim Duncan, General Manager, Link Testing Services;Dennis J. McNichol, President, Dennis NationaLease; Jim Fajerski, Business Manager, OE Sales and Applications Engineering, Federal Mogul Corporation; and Peter J. Blau, Senior Materials Development Engineer, Oak Ridge National Laboratory. The afternoon break-out sessions addressed nine questions concerning such issues as: ''Should the federal government regulate aftermarket lining quality?''; ''How many operators use RP 628, and if so, what's good or bad about it?''; and ''Would there be any value to you of a vocation-specific rating system?'' The opinions of each discussion group, consisting of 7-9 participants, were reported and consolidated in summary findings on each question. Some questions produced a greater degree of agreement than others. In general, the industry seems eager for more information that would allow those who are responsible for maintaining truck brakes to make better, more informed choices on aftermarket linings. A written fleet operator survey was also conducted during the TMC meeting. Twenty-one responses were received, spanning fleet sizes between 12 and 170,000 vehicles. Responses are summarized in a series of tables separated into responses from small (100 or fewer powered vehicles), medium (101-1000 vehicles), and large fleets (>1000 vehicles). The vast majority of fleets do their own brake maintenance, relying primarily on experience and lining manufactures to select aftermarket linings. At least half of the responders are familiar to some extent with TMC Recommended Practice 628 on brake linings, but most do not use this source of test data as the sole criterion to select linings. Significant shortfalls in the applicability of TMC RP 628 to certain types of brake systems were noted.

Blau, P.J.

2003-02-03T23:59:59.000Z

73

Recycled brake linings as partial aggregate substitute in asphalt paving. Construction and final report. Report for July 1992-August 1996  

SciTech Connect (OSTI)

The purpose of this project was to evaluate the performance of asphalt containing various percentages of brake lining as an aggregate, and compare its performance to that of normal asphalt containing natural aggregate. This project is an effort to explore alternate ways to use waste product. Four test section of FB-2 Modified mix containing brake lining materials were placed in July 1992 along with one control section on SR 3022 in Mercer county. To date all sections are performing satisfactory, and Brake linings should be recommended as a viable partial replacement of aggregate in bituminous materials. This study only considered the performance of only off-spec brake linings, therefore, any performance data or enviromental effects of placement of used brake material should be addressed.

Miller, P.A.; Sukley, R.

1996-09-01T23:59:59.000Z

74

Real-Time Dynamic Brake Assessment Conduct a proof-of-concept  

E-Print Network [OSTI]

Real-Time Dynamic Brake Assessment Purpose Conduct a proof-of-concept test to examine the Federal Motor Carrier Safety Administration's Vehicle and Roadside Operations Division Concept stemming conducted for the National Highway Transportation Safety Administration. Signals to be collected Real

75

Regenerative Braking for an Electric Vehicle Using Ultracapacitors and a Buck-Boost Converter  

E-Print Network [OSTI]

Regenerative Braking for an Electric Vehicle Using Ultracapacitors and a Buck-Boost Converter Juan for an Electric Vehicle has been simulated. The purpose of this device is to allow higher accelerations, similar in shape and size to a Chevrolet S-10. This vehicle was already converted to an electric car

Catholic University of Chile (Universidad Catlica de Chile)

76

A study of factors affecting foot movement time in a braking maneuver  

E-Print Network [OSTI]

The nature of foot movement time (MT) in an actual braking maneuver and in a stationary vehicle was investigated regarding the effects of age and gender of the driver and nature of the stimulus to which the driver was responding. ANOVAs showed...

Berman, Andrea Helene

1994-01-01T23:59:59.000Z

77

Nonlinear analysis of time series of vibration data from a friction brake: SSA, PCA, and MFDFA  

E-Print Network [OSTI]

We use the methodology of singular spectrum analysis (SSA), principal component analysis (PCA), and multi-fractal detrended fluctuation analysis (MFDFA), for investigating characteristics of vibration time series data from a friction brake. SSA and PCA are used to study the long time-scale characteristics of the time series. MFDFA is applied for investigating all time scales up to the smallest recorded one. It turns out that the majority of the long time-scale dynamics, that is presumably dominated by the structural dynamics of the brake system, is dominated by very few active dimensions only and can well be understood in terms of low dimensional chaotic attractors. The multi-fractal analysis shows that the fast dynamical processes originating in the friction interface are in turn truly multi-scale in nature.

Nikolay K. Vitanov; Norbert P. Hoffmann; Boris Wernitz

2014-10-23T23:59:59.000Z

78

DOES MAGNETIC-FIELD-ROTATION MISALIGNMENT SOLVE THE MAGNETIC BRAKING CATASTROPHE IN PROTOSTELLAR DISK FORMATION?  

SciTech Connect (OSTI)

Stars form in dense cores of molecular clouds that are observed to be significantly magnetized. In the simplest case of a laminar (non-turbulent) core with the magnetic field aligned with the rotation axis, both analytic considerations and numerical simulations have shown that the formation of a large, 10{sup 2} AU scale, rotationally supported protostellar disk is suppressed by magnetic braking in the ideal MHD limit for a realistic level of core magnetization. This theoretical difficulty in forming protostellar disks is termed the ''magnetic braking catastrophe''. A possible resolution to this problem, proposed by Hennebelle and Ciardi and Joos et al., is that misalignment between the magnetic field and rotation axis may weaken the magnetic braking enough to enable disk formation. We evaluate this possibility quantitatively through numerical simulations. We confirm the basic result of Joos et al. that the misalignment is indeed conducive to disk formation. In relatively weakly magnetized cores with dimensionless mass-to-flux ratio {approx}> 4, it enabled the formation of rotationally supported disks that would otherwise be suppressed if the magnetic field and rotation axis are aligned. For more strongly magnetized cores, disk formation remains suppressed, however, even for the maximum tilt angle of 90 Degree-Sign . If dense cores are as strongly magnetized as indicated by OH Zeeman observations (with a mean dimensionless mass-to-flux ratio {approx}2), it would be difficult for the misalignment alone to enable disk formation in the majority of them. We conclude that, while beneficial to disk formation, especially for the relatively weak field case, misalignment does not completely solve the problem of catastrophic magnetic braking in general.

Li Zhiyun [Astronomy Department, University of Virginia, Charlottesville, VA (United States); Krasnopolsky, Ruben; Shang, Hsien [Academia Sinica, Theoretical Institute for Advanced Research in Astrophysics, Taipei, Taiwan (China)

2013-09-01T23:59:59.000Z

79

Variations in gear fatigue life for different wind turbine braking strategies  

SciTech Connect (OSTI)

A large number of gearbox failures have occurred in the wind industry in a relatively short period, many because service loads were underestimated. High-torque transients that occur during starting and stopping are difficult to predict and may be overlooked in specifying gearbox design. Although these events comprise a small portion of total load cycles, they can be the most damaging. The severity of these loads varies dramatically with the specific configuration of the wind turbine. The large number of failures in Danish-designed Micon 65 wind turbines prompted this investigation. The high-speed and low-speed shaft torques were measured on a two-stage helical gearbox of a single Micon 65 turbine. Transient events and normal running loads were combined statistically to obtain a typical annual load spectrum. The pitting and bending fatigue lives of the gear teeth were calculated by using Miner's rule for four different high-speed shaft brake configurations. Each breaking scenario was run for both a high- and a low-turbulence normal operating load spectrum. The analysis showed increases in gear life by up to a factor of 25 when the standard high-speed shaft brake is replaced with a dynamic brake or modified with a damper. 9 refs., 9 figs., 3 tabs.

McNiff, B.P. (Second Wind, Inc., Somerville, MA (USA)); Musial, W.D. (Solar Energy Research Inst., Golden, CO (USA)); Errichello, R. (GEARTECH, Albany, CA (USA))

1991-06-01T23:59:59.000Z

80

Design Principles of a flywheel Regenerative Braking System (f-RBS) for Formula SAE type racecar and system testing on a Virtual Test Rig modeled on MSC ADAMS  

E-Print Network [OSTI]

momentum in the industry [4]. These vehicles (BEVs and HEVS) use electric motor/generator pairs to propel themselves and to recapture braking energy (electric RBS) and the power source is the battery. The regenerative braking system uses a generator..., aerodynamic and road losses. 4. Improvised Transmission design to reduce losses. 5. Hybrid and Alternative Energy Propulsion systems e.g. the Hybrid Electric Vehicle (HEV), the Fuel Cell Vehicle (FCV). 6. Recycling Braking energy Storage and reuse...

Pochiraju, Anirudh

2012-08-31T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Probability of failure of the waste hoist brake system at the Waste Isolation Pilot Plant (WIPP)  

SciTech Connect (OSTI)

In its most recent report on the annual probability of failure of the waste hoist brake system at the Waste Isolation Pilot Plant (WIPP), the annual failure rate is calculated to be 1.3E({minus}7)(1/yr), rounded off from 1.32E({minus}7). A calculation by the Environmental Evaluation Group (EEG) produces a result that is about 4% higher, namely 1.37E({minus}7)(1/yr). The difference is due to a minor error in the US Department of Energy (DOE) calculations in the Westinghouse 1996 report. WIPP`s hoist safety relies on a braking system consisting of a number of components including two crucial valves. The failure rate of the system needs to be recalculated periodically to accommodate new information on component failure, changes in maintenance and inspection schedules, occasional incidents such as a hoist traveling out-of-control, either up or down, and changes in the design of the brake system. This report examines DOE`s last two reports on the redesigned waste hoist system. In its calculations, the DOE has accepted one EEG recommendation and is using more current information about the component failures rates, the Nonelectronic Parts Reliability Data (NPRD). However, the DOE calculations fail to include the data uncertainties which are described in detail in the NPRD reports. The US Nuclear Regulatory Commission recommended that a system evaluation include mean estimates of component failure rates and take into account the potential uncertainties that exist so that an estimate can be made on the confidence level to be ascribed to the quantitative results. EEG has made this suggestion previously and the DOE has indicated why it does not accept the NRC recommendation. Hence, this EEG report illustrates the importance of including data uncertainty using a simple statistical example.

Greenfield, M.A. [Univ. of California, Los Angeles, CA (United States); Sargent, T.J. [Univ. of Chicago, IL (United States)]|[Stanford Univ., CA (United States). Hoover Institution

1998-01-01T23:59:59.000Z

82

Collapse of Magnetized Singular Isothermal Toroids: II. Rotation and Magnetic Braking  

E-Print Network [OSTI]

We study numerically the collapse of rotating, magnetized molecular cloud cores, focusing on rotation and magnetic braking during the main accretion phase of isolated star formation. Motivated by previous numerical work and analytic considerations, we idealize the pre-collapse core as a magnetized singular isothermal toroid, with a constant rotational speed everywhere. The collapse starts from the center, and propagates outwards in an inside-out fashion, satisfying exact self-similarity in space and time. For rotation rates and field strengths typical of dense low-mass cores, the main feature remains the flattening of the mass distribution along field lines -- the formation of a pseudodisk, as in the nonrotating cases. The density distribution of the pseudodisk is little affected by rotation. On the other hand, the rotation rate is strongly modified by pseudodisk formation. Most of the centrally accreted material reaches the vicinity of the protostar through the pseudodisk. The specific angular momentum can be greatly reduced on the way, by an order of magnitude or more, even when the pre-collapse field strength is substantially below the critical value for dominant cloud support. The efficient magnetic braking is due to the pinched geometry of the magnetic field in the pseudodisk, which strengthens the magnetic field and lengthens the level arm for braking. Both effects enhance the magnetic transport of angular momentum from inside to outside. The excess angular momentum is carried away in a low-speed outflow that has, despite claims made by other workers, little in common with observed bipolar molecular outflows. We discuss the implications of our calculations for the formation of true disks that are supported against gravity by rotation.

A. Allen; Z. Y. Li; F. H. Shu

2003-11-17T23:59:59.000Z

83

Hybrid Braking System for Non-Drive Axles | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Groundto Apply for Weatherization 7HybirdBraking System

84

Solar tracker motor having a fixed caliper and a translating caliper each with an electromagnetic brake system  

DOE Patents [OSTI]

Concepts and technologies described herein provide for an accurate and cost-effective method for rotating a solar array disk for tracking the movement of the sun. According to various aspects, a motor includes a fixed caliper and a translating caliper positioned adjacent to one another. Electromagnetically controlled brakes on the translating caliper grip the solar array disk while adjacent, but spaced apart, electromagnets on the fixed caliper and the translating caliper are energized to create an attractive force that pulls the translating caliper with the solar array disk toward the fixed caliper. After reaching the fixed caliper, brakes on the fixed caliper are engaged with the disk, brakes on the translating caliper are released from the disk, and the translating caliper is pushed back to the starting location where the process repeats until the desired rotation is completed.

Rau, Scott James

2013-01-29T23:59:59.000Z

85

Rotational evolution of the Crab pulsar in the wind braking model  

E-Print Network [OSTI]

The pulsar wind model is updated by considering the effect of particle density and pulsar death. It can describe both the short term and long term rotational evolution of pulsars consistently. It is applied to model the rotational evolution of the Crab pulsar. The pulsar is spun down by a combination of magnetic dipole radiation and particle wind. The parameters of the Crab pulsar, including magnetic field, inclination angle, and particle density are calculated. The particle density in acceleration region is about 10^3 times the Goldreich-Julian charge density. The lower braking index between glitches is due to a larger particle density. This may be glitch induced magnetospheric activities in normal pulsars. Evolution of braking index and the Crab pulsar in P-Pdot diagram are calculated. The Crab pulsar will evolve from magnetic dipole radiation dominated case towards particle wind dominated case. Considering the effect of pulsar "death", the Crab pulsar (and other normal pulsars) will not evolve to the clust...

Kou, F F

2015-01-01T23:59:59.000Z

86

Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeNew YorkLouisiana Laws andDakota1 Cleanbutton highlighted

87

Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeNew YorkLouisiana Laws andDakota1 Cleanbutton highlightedButton

88

Hybrid: Braking  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road User AssessmentNRELhighlightedButton

89

Use of an auditory signal in a rear-end collision warning system: effects on braking force and reaction time  

E-Print Network [OSTI]

driving game. Superimposed on the game screen was the image of a car which appeared to the driver to be ahead of him/her. The image enlarged in size, appearing to be a car applying its brakes. The participant was instructed to react as he would in a real...

Hopkins, Jennifer Susan

1995-01-01T23:59:59.000Z

90

CityCarControl : an electric vehicle drive-by-wire solution for distributed steering, braking and throttle control  

E-Print Network [OSTI]

In this paper, we propose CityCarControl, a system to manage the steering, braking, and throttle of a new class of intra-city electric vehicles. These vehicles have a focus on extreme light-weight and a small parking ...

Brown, Thomas B., M. Eng. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

91

Collapse of Magnetized Singular Isothermal Toroids: II. Rotation and Magnetic Braking  

E-Print Network [OSTI]

We study numerically the collapse of rotating, magnetized molecular cloud cores, focusing on rotation and magnetic braking during the main accretion phase of isolated star formation. Motivated by previous numerical work and analytic considerations, we idealize the pre-collapse core as a magnetized singular isothermal toroid, with a constant rotational speed everywhere. The collapse starts from the center, and propagates outwards in an inside-out fashion, satisfying exact self-similarity in space and time. For rotation rates and field strengths typical of dense low-mass cores, the main feature remains the flattening of the mass distribution along field lines -- the formation of a pseudodisk, as in the nonrotating cases. The density distribution of the pseudodisk is little affected by rotation. On the other hand, the rotation rate is strongly modified by pseudodisk formation. Most of the centrally accreted material reaches the vicinity of the protostar through the pseudodisk. The specific angular momentum can b...

Allen, A; Shu, F H

2003-01-01T23:59:59.000Z

92

A closed-loop quasi-optimal dynamic braking resistor and shunt reactor control strategy for transient stability  

SciTech Connect (OSTI)

A control strategy for dynamic braking resistor and shunt reactor is proposed for stabilization of power systems when subject to large disturbances. The time optimal control is derived as a function of synchronous machine power, its rotor angular position and speed deviation. The response for a single machine system with the proposed control has been compared with that from the time optimal solution obtained through the steepest descent method. The strategy has also been tested on two multimachine systems. Results indicate that the proposed strategy provides a simple and effective method of stabilization under transient emergency conditions.

Rahim, A.H.M.A.; Alamgir, D.A.H.

1988-08-01T23:59:59.000Z

93

Hydraulic Drivetrain and Regenerative Braking Team 13: Andrew Brown, Karan Desai, Andrew McGrath, Hurst Nuckols, Grant Wilson Adviser: Dr. Andrew Jackson  

E-Print Network [OSTI]

Hydraulic Drivetrain and Regenerative Braking Team 13: Andrew Brown, Karan Desai, Andrew Mc Pressure Reservior Filter Variable Vane Pump Motor/Pump Hydraulic Accumulators Solenoid Valve Relief Valve Suction Line Since their development in 2006, hydraulic drivetrain systems have gained considerable

Carpick, Robert W.

94

Vehicle System Dynamics, Vol. 26, No.4, October 1996, pp.301-320. Traction/Braking Force Distribution for Optimal Longitudinal  

E-Print Network [OSTI]

as the desired level of vehicle yaw motion, and the control system was designed to follow the yaw motion commandVehicle System Dynamics, Vol. 26, No.4, October 1996, pp.301-320. Traction/Braking Force in the past twenty years through the use of electronic devices. Four-wheel-steering (4WS) systems have been

Peng, Huei

95

An analysis of the annual probability of failure of the waste hoist brake system at the Waste Isolation Pilot Plant (WIPP)  

SciTech Connect (OSTI)

The Environmental Evaluation Group (EEG) previously analyzed the probability of a catastrophic accident in the waste hoist of the Waste Isolation Pilot Plant (WIPP) and published the results in Greenfield (1990; EEG-44) and Greenfield and Sargent (1993; EEG-53). The most significant safety element in the waste hoist is the hydraulic brake system, whose possible failure was identified in these studies as the most important contributor in accident scenarios. Westinghouse Electric Corporation, Waste Isolation Division has calculated the probability of an accident involving the brake system based on studies utilizing extensive fault tree analyses. This analysis conducted for the U.S. Department of Energy (DOE) used point estimates to describe the probability of failure and includes failure rates for the various components comprising the brake system. An additional controlling factor in the DOE calculations is the mode of operation of the brake system. This factor enters for the following reason. The basic failure rate per annum of any individual element is called the Event Probability (EP), and is expressed as the probability of failure per annum. The EP in turn is the product of two factors. One is the {open_quotes}reported{close_quotes} failure rate, usually expressed as the probability of failure per hour and the other is the expected number of hours that the element is in use, called the {open_quotes}mission time{close_quotes}. In many instances the {open_quotes}mission time{close_quotes} will be the number of operating hours of the brake system per annum. However since the operation of the waste hoist system includes regular {open_quotes}reoperational check{close_quotes} tests, the {open_quotes}mission time{close_quotes} for standby components is reduced in accordance with the specifics of the operational time table.

Greenfield, M.A. [Univ. of California, Los Angeles, CA (United States); Sargent, T.J.

1995-11-01T23:59:59.000Z

96

Design and test of a wet type helium turbo-expander with an alternator as a brake  

SciTech Connect (OSTI)

A wet type helium turbo-expander with expected adiabatic efficiency of 70% at inlet pressure, temperature, and outlet pressure of 1.3 MPa, 6.0 K, and 0.2 MPa, respectively, has been developed. An alternator is adopted as a brake where a permanent magnet is held in the turbine shaft. And a self-acting gas bearing is used at thrust and journal bearings. An electromagnet supports thrust bearing to lift up the thrust disk when initiating operation. Design mass flow rate of the turbine is determined to be 60 g/s, corresponding to the JT mass flow rate in the existing helium liquefier/refrigerator. In the cryogenic performance test, the turbine had increased helium liquefaction rate by four times larger than the liquefaction rate without turbine operation.

Kato, T.; Miyake, A.; Kawano, K.; Hamada, K.; Hiyama, T.; Iwamoto, S.; Ebisu, H.; Tsuji, H. [Japan Atomic Energy Research Institute, Ibaraki-ken (Japan); Saji, N.; Kaneko, Y. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan)] [and others

1994-12-31T23:59:59.000Z

97

Upper and lower limits on the Crab pulsar's astrophysical parameters set from gravitational wave observations by LIGO: braking index and energy considerations  

E-Print Network [OSTI]

The Laser Interferometer Gravitational Observatory (LIGO) has recently reached the end of its fifth science run (S5), having collected more than a year worth of data. Analysis of the data is still ongoing but a positive detection of gravitational waves, while possible, is not realistically expected for most likely sources. This is particularly true for what concerns gravitational waves from known pulsars. In fact, even under the most optimistic (and not very realistic) assumption that all the pulsar's observed spin-down is due to gravitational waves, the gravitational wave strain at earth from all the known isolated pulsars (with the only notable exception of the Crab pulsar) would not be strong enough to be detectable by existing detectors. By August 2006, LIGO had produced enough data for a coherent integration capable to extract signal from noise that was weaker than the one expected from the Crab pulsar's spin-down limit. No signal was detected, but beating the spin-down limit is a considerable achievement for the LIGO Scientific Collaboration (LSC). It is customary to translate the upper limit on strain from a pulsar into a more astrophysically significant upper limit on ellipticity. Once the spin-down limit has been beaten, it is possible to release the constraint that all the spin-down is due to gravitational wave emission. A more complete model with diverse braking mechanisms can be used to set limits on several astrophysical parameters of the pulsar. This paper shows possible values of such parameters for the Crab pulsar given the current limit on gravitational waves from this neutron star.

Giovanni Santostasi

2008-07-16T23:59:59.000Z

98

OVERVIEW ______ Sensors for Intelligent  

E-Print Network [OSTI]

are extensively applied in automobiles to control pollution, enhance fuel economy, implement anti-lock braking. For the interim, electromagnetic acoustic transducers (EMATs) show great promise as u

Wadley, Haydn

99

Svendborg Brakes | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWende NewSowitec do Brasil EnergiaSur de RenovablesPvt Ltd

100

http://www.cs.ucsb.edu/~sherwood/RCsec/ CyberTrust PI Meeting  

E-Print Network [OSTI]

. Blurring the line between software and hardware, reconfigurable hardware offers the raw high speed such as flight control and anti-lock braking, an adversary or rogue nation could potentially craft a soft core functions have different levels of trust (for example the anti-lock brakes and the MP3 player in your car

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Automated Validation of Software Models Steve Sims Rance Cleaveland  

E-Print Network [OSTI]

Simulink R and six Stateflow R diagrams and has an implementation consisting of approximately 1000 lines to formulate and check application spe- cific properties such as Will a car's anti-lock brakes ever engage when the brake pedal is not pressed? Addition- ally, Salsa can serve as the engine for consistency check- ing [TR

Cleaveland, Rance

102

Charles P. Shelton Philip Koopman  

E-Print Network [OSTI]

of components per subsystemN k Proof of Concept: Scalable Specification of an example Brake- By-Wire system + + + + + Real-world electromechanical anti-lock braking system transformed to hypothetical embedded network a race course Combine line following sensor system with location tracking and navigation algorithms Run

Koopman, Philip

103

Charles P. Shelton Philip Koopman  

E-Print Network [OSTI]

of components per subsystemN k Proof of Concept: Scalable Specification of an example Brake- By-Wire system + + + + + Real-world electromechanical anti-lock braking system transformed to hypothetical embedded network Systems GM Autonomous Robot Navigation: + + Combine line following sensor system with location tracking

Koopman, Philip

104

Adaptation of hybrid five-phase ABS algorithms for experimental validation  

E-Print Network [OSTI]

-lock braking, Hybrid control systems, Limit cycle analysis, Experimental validation, Quarter-car. 1Adaptation of hybrid five-phase ABS algorithms for experimental validation Mathieu Gerard WilliamAnti-lock Braking System (ABS) is the most important active safety system for passenger cars, but unfortunately

Paris-Sud XI, Universit de

105

auxiliary brakes: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

is modified to increase the productivity. The new fixture design is carried out by using CATIA V5 modeling software and it is critically evaluated for the failure of piston rod...

106

ORNL/Pub40701 Heavy and Overweight Vehicle Brake  

E-Print Network [OSTI]

, and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific

107

aircraft braking system: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

is to develop a thermoelastic Haviland, David 174 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

108

Global chassis control using braking and suspension systems P. Gaspar  

E-Print Network [OSTI]

. Poussot-Vassal , O. Sename , L. Dugard *Computer and Automation Research Institute, Hungary **Laboratoire active control mechanisms are applied in road vehicles to solve different control tasks, see e.g. [1,5,6,7]. As an example, the suspension system is the main tool to achieve comfort and road holding for a vehicle whilst

Paris-Sud XI, Université de

109

Modeling of air brakes for onboard diagnostics of heavy trucks  

E-Print Network [OSTI]

Accidents involving commercial vehicles have disastrous consequences; most of the times they result in human fatalities, environmental damage, traffic congestion leading to fuel wastage and associated productivity losses. Moreover, with the rapid...

Kankanala, Penchala N

2000-01-01T23:59:59.000Z

110

MODELING OF AN ELECTROMECHANICAL ENERGY HARVESTING SYSTEM INTEGRATED IN CAR DAMPERS  

E-Print Network [OSTI]

for the anti-lock braking system (ABS). These systems require energy to power the sensors that allow them variety of materials, such as piezoelectric materials and dielectric elastomers, and a broad range of mechanisms, such as electromagnetic generators, were developed. These techniques or materials enable

Boyer, Edmond

111

Role of Directional Wireless Communication in Vehicular Networks  

E-Print Network [OSTI]

expressed in this material are those of the author(s) and do not necessarily reflect the views such anti-lock brake systems (ABS), traction control systems (TCS) and electronic stability control (ESC the line-of-sight can be ef- ficiently enhanced by enabling vehicle-to-vehicle (V2V) and vehicle

112

RURAL PASSENGER SAFETY RESOURCES Exhibits (Insure for $500)  

E-Print Network [OSTI]

, A) Don't Let Up (Anti-lock Brake Safet (T, A) Sharing the Highways (with Big Trucks) (C) Street Bicycle Safety Car Pools and the Buckle Rule Child Safety Seat Fact Cards (Eng/Sp) Children and Air Bags Protection Laws in Texas(E/S) One Minute Car Seat Check Up Pedestrian Safety Safety First (Eng/Sp) Safety

113

Time-Based Intrusion Detection in Cyber-Physical Systems Christopher Zimmer, Balasubramany Bhat, Frank Mueller  

E-Print Network [OSTI]

determined prior to the schedulability analysis. We demonstrate how to provide micro-timings for multiple granularity levels of application code. Through bounds checking of these micro-timings, we develop techniques) to highly critical ones (anti-lock brakes, hydro-electric dam controls and flight control systems

Mueller, Frank

114

rail inspections matrix  

Broader source: Energy.gov (indexed) [DOE]

of Air Brakes 4 - Air Brakes and Parts 5 - Air Brake Hoses and Hose Supports 6 - Brake Beams 7 - Brake Beam Hangers 8 - Brake Beam Hanger Brackets and Bracket Wear Plates 9 -...

115

Brake rotor design and comparison using finite element analysis : an investigation in topology optimization  

E-Print Network [OSTI]

An Introduction to the Conjugate Gradient Method Without thedescent method and the conjugate gradient method. The onlymethod and the conjugate gradient method can be found in

Domond, Kenneth

2010-01-01T23:59:59.000Z

116

Experimental Evaluation of Time-redundant Execution for a Brake-by-wire Application  

E-Print Network [OSTI]

faults is to use time-redundancy [3, 4, 5, 6]. The declining prices of high-performance microprocessors error masking. The real-time kernel uses fixed priority scheduling to control temporal error masking

Karlsson, Johan

117

ORNL/TTG/BWPT/PVS/Rev5 Performance-Based Brake Tester  

E-Print Network [OSTI]

, and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific

118

E-Print Network 3.0 - automatic braking Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

limit the speed of an inline ... Source: Mft, Sinan - Department of Mechanical and Industrial Engineering, Northeastern University Collection: Engineering 2 Technical Report...

119

A performance evaluation of an automotive magnetorheological brake design with a sliding mode controller  

E-Print Network [OSTI]

industries due to its potential to improve vehicle perfor- mance, safety and cost. The ``x'' in x Engineering, University of Victoria, 3800 Finnerty Road, P.O. Box 3055 STN CSC, Victoria, BC, Canada V8W 3P6 flow and heat transfer analysis. The performance of the MRB in a vehicle was studied using a quarter

Park, Edward

120

Combined fast valving and braking resistor application to improve transient stability  

E-Print Network [OSTI]

. In many cases, power plants and load centers are connected through long transmission lines. Furthermore, the development over the years of improved methods of' cooling generators and of designing low pressure turbine stages have resulted in a reduction... power input to the turbogenerator is measured with a reheater pressure transducer and the electrica1 power output from the generator is measured with a kw transducer. When the 10 0 V 0 C4 4 0) f-4 H m Cd . A ) N Cd VII &D '0 (U Ctd cd cdm OE...

Chen, Jen-Yeu Thomas

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Abstract Arsenic hyperaccumulator Pteris vittata L. (Chinese brake fern) grows well in arsenic-contami-  

E-Print Network [OSTI]

and plated on medium containing 4 mM of arsenate, a common form of arsenic in the environment. The deduced ubiquitous in the environment. It is present both as arsenite (AsIII) and arsenate (AsV) in the environment

Ma, Lena

122

A molecular brake, not a clutch, stops the Rhodobacter sphaeroides flagellar motor  

E-Print Network [OSTI]

,1,2 , Mostyn T. Brownb,1 , Mark C. Leakea,c , Richard W. Brancha , Richard M. Berrya , and Judith P peptidoglycan-bound stator complexes, down an electrochemical gradient into the cytoplasm, is responsible

Berry, Richard

123

ORNL/TM-2011/479 Real-Time Dynamic Brake Assessment  

E-Print Network [OSTI]

.............................................................................................................................1 1.1 BACKGROUND...............................................................................................................6 2.2.1 Test Vehicle and Sensors

124

Pneumatic brake control for precision stopping of heavy-duty vehicles  

E-Print Network [OSTI]

6], heavy-duty vehicle maintenance automation, as well astrue automation are applications on heavy-duty vehicles [

Bu, Fanping; Tan, Han-Shue

2007-01-01T23:59:59.000Z

125

Injection Timing Effects on Brake Fuel Conversion Efficiency and Engine System's Respones  

E-Print Network [OSTI]

to excessive speeds and intake manifold to unnecessary pressures. 10 Table 1: Engine Specifications Number of Cylinders 4 Compression Ratio 17.0:1 Bore (in, mm) 4.19, 106 Stroke (in,mm) 5, 127 Displacement (in2... then decrease as injection moves from its most retarded timing to its most advanced timing. When varying from -4? ATDC to -22? ATDC, the BFCE reaches a peak at -10? ATDC of 22.9%, while the minimum of 20.1% occurs at -22? ATDC. For higher load low speed...

McLean, James Elliott

2011-10-21T23:59:59.000Z

126

Arsenic species and leachability in the fronds of the hyperaccumulator Chinese brake (Pteris vittata L.)  

E-Print Network [OSTI]

coupled with atomic fluorescence spectrometry. The impacts of air-drying on arsenic species Science Ltd. doi:10.1016/S0269-7491(02)00470-0 Enviro

Ma, Lena

127

Author's personal copy What can the braking indices tell us about the nature of pulsars?  

E-Print Network [OSTI]

additional torques by particle outflow or accretion disk, changes in inclination angle or magnetic field's personal copy pole radiation and relativistic particle flow/wind (Dar, 1999; Allen and Horvath, 2000; Xu and Qiao, 2001; Wu et al., 2003; Contopoulos et al., 2006), the models with changing inclination angles (e

Xu, Ren-Xin

128

Daimler's SuperTruck Program; 50% Brake Thermal Efficiency | Department of  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models | Department1 Prepared by:DTE Energy Video (Text Version)000

129

Detection of a magnetic field on HD108: clues to extreme magnetic braking and the Of?p phenomenon  

E-Print Network [OSTI]

We report the detection of a magnetic field on the Of?p star HD108. Spectropolarimetric observations conducted in 2007, 2008 and 2009 respectively with NARVAL@TBL and ESPaDOnS@CFHT reveal a clear Zeeman signature in the average Stokes V profile, stable on timescales of days to months and slowly increasing in amplitude on timescales of years. We speculate that this timescale is the same as that on which Ha emission is varying and is equal to the rotation period of the star. The corresponding longitudinal magnetic field, measured during each of the three seasons, increases slowly from 100 to 150G, implying that the polar strength of the putatively-dipolar large-scale magnetic field of HD108 is at least 0.5kG and most likely of the order of 1-2 kG. The stellar and wind properties are derived through a quantitative spectroscopic analysis with the code CMFGEN. The effective temperature is difficult to constrain because of the unusually strong HeI4471 and HeI5876 lines. Values in the range 33000-37000 K are preferr...

Martins, F; Marcolino, W L F; Bouret, J -C; Wade, G A; Escolano, C; Howarth, I D

2010-01-01T23:59:59.000Z

130

486 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 54, NO. 2, MARCH 2005 Iterative Learning Control of Antilock Braking of  

E-Print Network [OSTI]

Engineering, University of Michigan-Dearborn, Dearborn, MI 48128 USA (e-mail: chrismi@umich.edu; mi Engineering, University of Michigan-Dearborn, Dearborn, MI 48128 USA (e-mail: anding@umich.edu). Digital driving, while the equivalent model, Corolla, which is driven by an internal combustion engine (ICE) alone

Mi, Chunting "Chris"

131

Energy-Saving Control of an Unstable Valve with a MR Brake QingHui Yuan and Perry Y. Li  

E-Print Network [OSTI]

to the effect of flow induced forces, QingHui Yuan is with Eaton Corporation Innovation Center, Eden Prairie, MN. QinghuiYuan@eaton.com P. Y. Li is with the Department of Mechanical Engineering, University of Minnesota

Li, Perry Y.

132

alternative fuel vehicles: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

133

alternative fuel vehicle: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

lower brake specific fuel consumption for DBE10 compare to diesel. Index Terms- injection pressure, oxygenated fuel, brake thermal efficiency D I. Sharun Mendonca; John Paul Vas...

134

Value Capture in the Global Wind Energy Industry  

E-Print Network [OSTI]

Nacelle housing Brake system Yaw bearings All other Suppliern.a. n.a. Brake system n.a. n.a. Yaw bearings Spain n .a.

Dedrick, Jason; Kraemer, Kenneth L.

2011-01-01T23:59:59.000Z

135

Observations of Infalling and Rotational Motions on a 1,000-AU Scale around 17 Class 0 and 0/I Protostars: Hints of Disk Growth and Magnetic Braking?  

E-Print Network [OSTI]

We perform imaging and analyses of SMA 1.3 mm continuum, C18O (2-1) and 12CO (2-1) line data of 17 Class 0 and 0/I protostars to study their gas kinematics on a 1,000-AU scale. Continuum and C18O (2-1) emission are detected toward all the sample sources and show central primary components with sizes of ~600-1,500 AU associated with protostars. The velocity gradients in C18O (2-1) have wide ranges of orientations from parallel to perpendicular to the outflows, with magnitudes from ~1 to ~530 km/s/pc. We construct a simple kinematic model to reproduce the observed velocity gradients, estimate the infalling and rotational velocities, and infer the disk radii and the protostellar masses. The inferred disk radii range from 500 AU with estimated protostellar masses from 1 Msun. Our results hint that both large and small disks are possibly present around Class 0 protostars, which could be a sign of disk growth at the Class 0 stage. In addition, the directions of the overall velocity gradients in 7 out of the 17 sour...

Yen, Hsi-Wei; Takakuwa, Shigehisa; Ho, Paul T P; Ohashi, Nagayoshi; Tang, Ya-Wen

2014-01-01T23:59:59.000Z

136

Atmospheric Environment 41 (2007) 49084919 Particle size and composition distribution analysis of automotive  

E-Print Network [OSTI]

of automotive brake abrasion dusts for the evaluation of antimony sources of airborne particulate matter Akihiro

Short, Daniel

137

Machine Design -2 The figure below shows a picture of the splined end of a failed half-shaft. The fatigue failure occurred at the  

E-Print Network [OSTI]

and resists the braking torque on deceleration. The acceleration and braking torques act in opposite directions, the braking torque will be taken as positive since it is the larger torque. The acceleration torque is measured accurately, Tmin = -411.6 in-lbf. The braking torque is loosely estimated as Tmax

Virginia Tech

138

DRIVING SAFETY Summer time in the south and that means the potential for afternoon thunderstorms. Listed below are the  

E-Print Network [OSTI]

with oil and dirt on the road that makes it slippery. Slow down for large puddles, wet brakes reduce breaking ability. Drive through slowly, tapping the brake. Test brakes once you're through, after checking. If you start to lose control, take your foot off the gas. Don't brake suddenly. Be aware of passing

Li, X. Rong

139

Experimental analysis on squeal modal instability F.Massi, L.Baillet, O.Giannini  

E-Print Network [OSTI]

-mail: francesco.massi@uniroma1.it Abstract In this paper, an experimental analysis performed on a simplified brake apparatus is presented. Brake squeal is a major concern in braking design. During past years a common a dynamic instability. When two modes of the brake system couple at the same frequency, one of them becomes

Boyer, Edmond

140

Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks  

E-Print Network [OSTI]

Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks 90% of this material is reproduced brakes before a collision Some 40% more do not brake effectively Road Accidents 41.600 fatalities 1

Lo Cigno, Renato Antonio

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks  

E-Print Network [OSTI]

Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks 90% of this material is reproduced brakes before a collision Some 40% more do not brake effectively Road Accidents 41.600 fatalities 1

Lo Cigno, Renato Antonio

142

Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks  

E-Print Network [OSTI]

Nomadic Communications AA 2010/11 Vehicular Ad Hoc Networks 90% of this material is reproduced% of passengers vehicles and 26% of trucks do not activate brakes before a collision Some 40% more do not brake

Lo Cigno, Renato Antonio

143

Empathic Experience Design (Seepersad) | 1! EMPATHIC EXPERIENCE DESIGN!  

E-Print Network [OSTI]

! Cost! External interactions! User interactions! Architecture! material flow! energy flow! inform to a product! Often innovate themselves! Drum Brakes! Aftermarket Forks! Quick-release seats! Motorcycle brake levers! Reinforced Frames! [4] Von Hippel, E., 2005, Democratizing Innovation, MIT Press.! Photo

Ghosh, Joydeep

144

Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks  

E-Print Network [OSTI]

Nomadic Communications AA 2009/10 Vehicular Ad Hoc Networks 90% of this material is reproduced% of passengers vehicles and 26% of trucks do not activate brakes before a collision Some 40% more do not brake

Lo Cigno, Renato Antonio

145

CRANE/HOIST SAFETY PROGRAM Texas Tech University  

E-Print Network [OSTI]

HOLDING BRAKE..........................................................................................6) are protected from potential hazards associated with the movement of equipment and material. The Crane

Zhang, Yuanlin

146

Technical Report #36 March 1, 1984 Computational Logic Inc.  

E-Print Network [OSTI]

. An entire line of automobiles is recalled because of problems with the software that controls the braking

Boyer, Robert Stephen

147

MUSIC VENUES IN EXETERMUSIC VENUES IN EXETER EXETER'S MUSIC SCENEEXETER'S MUSIC SCENE  

E-Print Network [OSTI]

The Damned o Turin Brakes o Youngblood Brass Band #12;AROUND EXETERAROUND EXETER Cavern Club Live Music Venue

Mumby, Peter J.

148

Analysis, Design, And Evaluation Of Avcs For Heavy-duty Vehicles With Actuator Delays  

E-Print Network [OSTI]

fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 4: Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 5: Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 8: Ten autonomous vehicles,

Yanakiev, Diana; Eyre, Jennifer; Kanellakopoulos, Ioannis

1998-01-01T23:59:59.000Z

149

Analysis, Design And Evaluation Of Avcs For Heavy-duty Vehicles  

E-Print Network [OSTI]

fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 2 : Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 3 : Ten autonomous vehicles,fuel/brake (deg) time (s) acceleration (m/s 2 ) time (s) Figure 6 : Ten autonomous vehicles,

Yanakiev, Diana; Kanellakopoulos, Ioannis

1996-01-01T23:59:59.000Z

150

Getting Out of the Way Safety Verification without Compromise  

E-Print Network [OSTI]

verification of adaptive cruise control algorithms require both discrete braking modes and overly conservative conditions for adaptive cruise control algorithms that do not require discontinuous braking and also allow Assume global upper and lower braking bounds Assume worst-case scenario (WCS) Leader uses strongest

Sivilotti, Paul

151

Traffic Light Mapping and Detection Nathaniel Fairfield Chris Urmson  

E-Print Network [OSTI]

by lines painted on the road, traffic lights indicate precedence at intersections, brake lights show when, are becoming common- place as part of commercial driver-assistance systems. With power steering, power brakes obstructions or false positives such as those induced by the brake lights of other vehicles. Happily, both

Tomkins, Andrew

152

Design and Implementation of a Teleautonomous Hummer Darrin C. Bentivegna, Khaled S. Ali, Ronald C. Arkin and Tucker Balch  

E-Print Network [OSTI]

for steering, brake, and throttle have been implemented on a commercially available Hummer. Control is provided to feedback sensors for the steering wheel, brake, and forward speed; and a Unix workstation for high control the steering wheel, brake pedal and throttle. A control computer performs lowlevel computation

153

A Preliminary Report on Tool Support and Methodology for Feature Interaction Detection  

E-Print Network [OSTI]

that operate the dynamics of the vehicle. Examples of these mechanical components are brakes, throttle of these mechanical components are brakes, throttle and steering. Ideally, features should be able to be integrated simultaneous requests to apply the brakes and the throttle. The feature interaction problem becomes more

Waterloo, University of

154

Influence of physical parameters and operating conditions for structural integrity of mechanical system subjected to squeal noise  

E-Print Network [OSTI]

for the static load and circular wave front lines for the ramp loading. Introduction Disc brake systems-linear vibrations, acoustic radiation, brake squeal, friction Abstract. This work proposes to study the effects of physical parameters and loading conditions on both dynamic and acoustic responses of a brake system

Paris-Sud XI, Universit de

155

Science Arts & Mtiers (SAM) is an open access repository that collects the work of Arts et Mtiers ParisTech  

E-Print Network [OSTI]

BALMES - On the influence of geometry updating on modal correlation of brake components. - 2012 Any On the influence of geometry updating on modal correlation of brake components. B. Frana de Paulaa , G. Rejdycha degradation of the test/analysis correlation. An application to an industrial brake part is eventually

Boyer, Edmond

156

Correctness Proofs for Device Drivers in Embedded Systems Jianjun Duan  

E-Print Network [OSTI]

that may be thousands of lines; we intend to integrate our manual proofs about bottom-level routines. For example, an auto- motive brake-by-wire system might be required to begin brake drum actuation within 50 ms of receiving a brake pedal input. Let's look at a more detailed example: a hypothetical embedded system

Regehr, John

157

A Vehicle-to-Vehicle Communication Protocol for Cooperative Collision Warning  

E-Print Network [OSTI]

safer than B due to the following two reasons: Line-of-sight limitation of brake light: Typically by Vodafone-U.S. Foundation Graduate Fellowship. and , travel in the same lane. When suddenly brakes, a driver can only see the brake light from the vehicle di- rectly in front1 . Thus, very likely vehicle

Liu, Jie

158

ME 379M Race Car Engineering and Project Management ABET EC2000 syllabus  

E-Print Network [OSTI]

. Engine Calibration (5 classes) 3. Modeling Straight Line Performance (3 classes) 4. Braking and Brake in class. Other Required Material: NA Course Objectives: The primary goal of ME 379M is to teach economy and emissions, transmission/differential, and vehicle performance modeling. 3) Brake systems

Ben-Yakar, Adela

159

Journal of Cleaner Production 13 (2005) 1931 www.elsevier.com/locate/jclepro  

E-Print Network [OSTI]

and products of service. Brake pads are true products of consumption, because they are released to biological be expec- ted to be increasingly used for cars. However, cars also contain some consumption parts polyethylene terephthalate (PET) [3]. Brake pads (syn- onym ``brake linings'') are polymer matrix composites

Short, Daniel

160

Concurrency Theory Lecture 22: Timed Modelling & Conclusions  

E-Print Network [OSTI]

Systems Example 22.1 (Real-time reactive systems) brake systems and airbags in cars plant controls mobile.1 (Real-time reactive systems) brake systems and airbags in cars plant controls mobile phones ... Real-Time Reactive Systems Example 22.1 (Real-time reactive systems) brake systems and airbags in cars plant controls

Ábrahám, Erika

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

48669Federal Register / Vol. 65, No. 154 / Wednesday, August 9, 2000 / Proposed Rules Type of motor vehicle  

E-Print Network [OSTI]

vehicle Service Brake Systems Emergency brake sys- tems: applica- tion and brak- ing distance in feet from initial speed of 20 mph Braking force as a percent- age of gross vehicle or combination weight mph B. Property-carrying vehicles: (1) Single unit vehicles having a manufacturer's GVWR of 10

162

Oxygen-Enriched Combustion for Military Diesel Engine Generators...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Combustion for Military Diesel Engine Generators Oxygen-Enriched Combustion for Military Diesel Engine Generators Substantial increases in brake power and considerably lower peak...

163

DOE/LX/07-0092&D1 Secondary Document  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

formerly stored included capacitors, light ballasts, and liquid-filled potential transformers, brake shoes, speed increaser, recorders, portable handrails, carts, a metal...

164

air coupled ultrasonic: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ultrasonic testing (ACUT) setup for the inspection of commercial carbon-carbon composite aircraft brake disks was developed in Intelligent Measurement and Evaluation...

165

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

45 Overall DC electrical energy consumption (DC Whmi) 29 Overall DC electrical energy captured from regenerative braking (DC Whmi) 39 Total number of trips 10,847 Total...

166

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

50 Overall DC electrical energy consumption (DC Whmi) 39 Overall DC electrical energy captured from regenerative braking (DC Whmi) 28 Total number of trips 10,624 Total...

167

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

148 Overall DC electrical energy consumption (DC Whmi) 87 Overall DC electrical energy captured from regenerative braking (DC Whmi) 46 Total number of trips 6,223 Total...

168

Monthly Summary Results for the Chrysler RAM PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

5 Overall AC electrical energy consumption (AC Whmi) 111 Overall DC electrical energy consumption (DC Whmi) 71 Overall DC electrical energy captured from regenerative braking...

169

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

52 Overall DC electrical energy consumption (DC Whmi) 29 Overall DC electrical energy captured from regenerative braking (DC Whmi) 39 Total number of trips 22,071 Total...

170

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

0 Overall DC electrical energy consumption (DC Whmi) 61 Overall DC electrical energy captured from regenerative braking (DC Whmi) 43 Total number of trips 111,773 Total...

171

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

20 Overall AC electrical energy consumption (AC Whmi) 93 Overall DC electrical energy consumption (DC Whmi) 71 Overall DC electrical energy captured from regenerative braking...

172

Monthly Summary Results for the Chrysler RAM PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

18 Overall DC electrical energy consumption (DC Whmi) 74 Overall DC electrical energy captured from regenerative braking (DC Whmi) 45 Total number of trips 11,462 Total...

173

Monthly Summary Results for the Chrysler RAM PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

190 Overall DC electrical energy consumption (DC Whmi) 111 Overall DC electrical energy captured from regenerative braking (DC Whmi) 50 Total number of trips 2,055 Total...

174

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

0 Overall DC electrical energy consumption (DC Whmi) 66 Overall DC electrical energy captured from regenerative braking (DC Whmi) 30 Total number of trips 725 Total distance...

175

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

9 Overall AC electrical energy consumption (AC Whmi) 79 Overall DC electrical energy consumption (DC Whmi) 63 Overall DC electrical energy captured from regenerative braking...

176

Energy Department Announces $4 Million Solicitation for Solid...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

fluorescent lamps. SSL sources are already replacing conventional technologies in automobile brake lights, traffic signals, exit signs and flashlights. The solid-state lighting...

177

Secretary Chu's Remarks at the California Institute of Technology...  

Office of Environmental Management (EM)

computer tools with embedded energy analysis. It was the system integration of the automobile engine, transmission, brakes and battery that enabled Toyota to create the Prius....

178

E-Print Network 3.0 - annular flow conditions Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Environmental Sciences and Ecology ; Geosciences 88 225Noise Control Eng. J. 52 (5), 2004 SeptOct Determination of sound radiation from a simplified disk-brake...

179

applied modal analysis: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

instability. Introduction Disc brake noise continues to be object of investigation for automotive-mail: francesco.massi@uniroma1.it Abstract In this paper, an experimental...

180

E-Print Network 3.0 - antioxidant response element-mediated Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

brake fern (Pteris vittata L.) upon... adaptive biochemical responses such as production of antioxidant ... Source: Ma, Lena - Soil and Water Science Department, University...

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Defining engine efficiency limits  

Broader source: Energy.gov (indexed) [DOE]

waste energy in the exhaust where it may be recovered through a bottoming cycle, turbo-compounding, thermo-electrics, etc Brake Work Combustion Irreversibility Q o Remaining...

182

Climate and Transportation Solutions: Findings from the 2009 Asilomar Conference on Transportation and Energy Policy  

E-Print Network [OSTI]

hybrid motor using braking energy or by a waste heat recovery system,source of energy. Long-haul hybrid systems can be effective

Sperling, Daniel; Cannon, James S.

2010-01-01T23:59:59.000Z

183

E-Print Network 3.0 - aircraft carriers proposed Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: for deceleration during landing, it is proposed that aircraft can use wheel brakes only for stopping. It is also... proposed that using an aircraft tow for...

184

UVM Outing Club Winter Group Equipment List  

E-Print Network [OSTI]

: _____ have gas tank full _____ add dry gas in extreme cold weather _____ disconnect battery NOTES: #12; _____ chains/cables _____ oil _____ extra antifreeze _____ brake and transmission fluids _____ scraper

Hayden, Nancy J.

185

Radiation Safety  

Broader source: Energy.gov (indexed) [DOE]

Weeks of training * 15 of that is OJT * General Code of Operating Rules * Air Brake & Train Handling * System Special Instructions * Safety Instructions * Federal Regulations *...

186

Design of life-size haptic environments Yoky Matsuoka  

E-Print Network [OSTI]

, or software failure, a brake-actuated device is inherently incapable of exceeding the kinetic energy of motion while still allowing us to simulate virtual objects (i.e. to constrain the user's motion inside comparisons to active devices. Theo- retically, we demonstrate that brake-actuated devices surprisingly

Matsuoka, Yoky

187

06/21/2007 02:33 PMA Warning System As Your Co-Pilot -WSJ.com Page 1 of 2http://online.wsj.com/public/article_print/SB118237615627242545.html  

E-Print Network [OSTI]

quickly, the car automatically slows to a safe-braking distance. Upside: If the car complains when you that gauge and maintain safe-braking distances may keep bumper riders -- and fender benders -- in check of this material are governed by our Subscriber A

Shashua, Amnon

188

WABCO Automotive UK Ltd is part of American Standard Companies Inc. As  

E-Print Network [OSTI]

automotive products companies, it supplies braking and other control systems to the commercial vehicle TAKING THE OIL OUT OF PUTTING THE BRAKES ON KTP BENEFITS Knowledge Transfer Partnerships are designed material based on the pressure swing adsorption technique. They also have increased knowledge of how oil

Berzins, M.

189

Dear Editor: It appears to me that the basic premise of Nancy Mead's article "Who is liable for  

E-Print Network [OSTI]

." The second scenario is the following. "A is driving his car, a model X, when, suddenly, the brakes fail. In the second case, they can sue the manufacturer Y for the brake failure, while in the first case they must, my bank is selling my personal information without my permission, on-line merchants are collecting

Santini, Simone

190

Exemplar of Automotive Architecture with Variability Kacper Bak, Marko Novakovic, Leonardo Passos  

E-Print Network [OSTI]

are assembled from physical components, such as engine, brakes, or lights. Modern cars, however, are software of such a system. It controls engine and brakes so that the car automatically maintains selected speed and keeps manufacturers have been using Software Product Lines (SPLs) to deliver car-specific software from a shared code

Czarnecki, Krzysztof

191

Seminar: Entwicklung eingebetteter Systeme Margot Bittner, Mark-Oliver Reiser  

E-Print Network [OSTI]

interactions Product lines and multi-tier organizations Mechanical engineering processes and organizations >100k Testflle >100k Anforderungsobjekte Engine Mgmnt. System ETAS Brake Actuator Siemens Torqu e Mode_speed vehicle_speed engine _ torque rain_intensity accelerator_pedal_request brake_torque brak e_

Wichmann, Felix

192

Norges teknisk naturvitenskapelige universitet  

E-Print Network [OSTI]

on the last page in the problem set shows observed lifetimes for brake pads for a random sample of 40 cars = mixed driving The 40 observations, each represented by a line in the table, are assumed of independent censoring for the brake pad data of this problem set. Can one in this situation also suspect

Langseth, Helge

193

A Methodology for the Development of Novel VANET Safety Applications1  

E-Print Network [OSTI]

.edu, {boxu,wolfson}@cs.uic.edu Jie Lin Department of Civil and Materials Engineering University of Illinois. Examples of such applications include the emergency electronic brake light or the highway merge warning the Electronic Emergency Brake Lights (EEBL), the Highway Merge Warning (HMW), and the Control Loss Warning (CLW

Wolfson, Ouri E.

194

Department of Mechanical and Nuclear Engineering Spring 2011 KYDEX LLC, 1  

E-Print Network [OSTI]

process. Capping is applied to the KYDEX material to provide protection and/or add decorative patterns. Currently, the tension is controlled by manually adjusting the air brake on the feed roller. The brake must accurately measure the tension on the capping material. The system should be able to automatically adjust

Demirel, Melik C.

195

Complex Embedded Automotive Control Systems DaimlerChrysler  

E-Print Network [OSTI]

progressed along several lines of inquiry, it appears to be the case that almost no effort has been devoted equipped with active systems (4-wheel- steering, active suspension, active brakes, etc.) may, in principle and rear steer-by-wire, brake-by-wire and active suspensions. An integrated chassis controller would com

Duffy, Ken

196

Comprehensive Experimental Analyses of Automotive Attack Surfaces Stephen Checkoway, Damon McCoy, Brian Kantor,  

E-Print Network [OSTI]

-computerized attacks as well (e.g., cutting the brake lines). This situation suggests a significant gap in knowledge distributed com- puter systems comprising millions of lines of code execut- ing on tens of heterogeneous network can circumvent all computer control systems, including safety critical elements such as the brakes

Hu, Fei

197

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 7, NO. 2, MARCH 1999 271 Sliding Mode Measurement Feedback Control  

E-Print Network [OSTI]

Measurement Feedback Control for Antilock Braking Systems Cem Unsal, Member, IEEE, and Pushkin Kachroo, R. Takahashi. This material is based upon work supported by VDOT and Virginia Tech's Center of vehicle motion and stability by providing anti-skid braking and anti- spin acceleration. The design

Kachroo, Pushkin

198

10/06/09 10:24 AMUntitled Page 1 of 1  

E-Print Network [OSTI]

as a single driver tapping lightly on the brakes inadvertently starting a chain reaction of over-braking by drivers in the following vehicles. Eventually a long line of traffic comes to a complete stop. On major materials provided by University of Alberta, via EurekAlert!, a service of AAAS. Need to cite this story

Flynn, Morris R.

199

November 18, 2009 22:50 Vehicle System Dynamics VSD09 Vehicle System Dynamics  

E-Print Network [OSTI]

November 18, 2009 22:50 Vehicle System Dynamics VSD09 Vehicle System Dynamics Vol. 00, No. 00), involving the steering and braking actuators. This VDSC aims at improving automotive vehicle yaw stability the rear wheels) and use the steering actuator only if it is necessary (e.g. if the braking system

Boyer, Edmond

200

IEEE Instrumentation and Measurement Technology Conference  

E-Print Network [OSTI]

, and light emitting diode brake- light messaging. These technologies all focus on improving the signal- ance, sensor, radar, fluorescence, light emitting diode. I. INTRODUCTION As a compromise between · Radar reflection-enhanced license plates · Vehicle-to-vehicle light emitting diode (LED) brake- light

Gillespie, Brent

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 13, NO. 1, FEBRUARY 2008 1 Development of a Scaled Vehicle With Longitudinal  

E-Print Network [OSTI]

displacement of the flywheel (rad). i Angular displacement of the turbine (rad). t Angular displacement material (kg/m3 ). brake Brake torque (Nm). B Damping coefficient of transmission (kg/s). Rdcm DC motor motor (Nm). e Torque produced by the engine (Nm). It Transmission inertia (kgm2 ). t Turbine torque

Del Vecchio, Domitilla

202

Verification tests of the U. S. Electricar Corporation Lectric Leopard. Technical report 3 Aug-25 Sep 81  

SciTech Connect (OSTI)

The Lectric Leopard manufactured by U.S. Electricar Corporation was tested at MERADCOM as part of the Department of Energy project to verify conformity to performance standards of electric vehicles. The Leopard is a standard Fiat Strada sedan which has been converted to an electric vehicle. It is powered by 16 6-V batteries through a silicon-controlled rectifier (SCR) Controller to a 23-hp series-wound d.c. motor. It is equipped with a five-speed manual transmission, power-assisted disc brakes in the front and drum brakes in the rear. It is not equipped with regenerative braking.

Dowgiallo, E.J. Jr; Snellings, I.R.; Chapman, R.D.

1982-04-01T23:59:59.000Z

203

Tyre modelling for use in vehicle dynamics studies  

SciTech Connect (OSTI)

A new way of representing tyre data obtained from measurements in pure cornering and pure braking conditions has been developed in order to further improve the Dynamic Safety of vehicles. The method makes use of a formula with coefficients which describe some of the typifying quantities of a tyre, such as slip stiffnesses at zero slip and force and torque peak values. The formula is capable of describing the characteristics of side force, brake force and self aligning torque with great accuracy. This mathematical representation is limited to steady-state conditions during either pure cornering or pure braking and forms the basis for a model describing tyre behaviour during combined braking and cornering.

Bakker, E.; Nyborg, L.; Pacejka, H.B.

1987-01-01T23:59:59.000Z

204

Crevice volume effect on spark ignition engine efficiency  

E-Print Network [OSTI]

A set of experiments and a simulation study are completed to quantify the effect of the piston crevice on engine efficiency. The simulation study breaks down the loss mechanisms on brake efficiency at different displacement ...

Smith, Patrick M. (Patrick Michael)

2013-01-01T23:59:59.000Z

205

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

33 Overall DC electrical energy consumption (DC Whmi) 26 Overall DC electrical energy captured from regenerative braking (DC Whmi) 27 Total number of trips 6,332 Total distance...

206

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

1 Overall DC electrical energy consumption (DC Whmi) 64 Overall DC electrical energy captured from regenerative braking (DC Whmi) 30 Total number of trips 4,292 Total distance...

207

Monthly Summary Results for the Chrysler RAM PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

1 Overall DC electrical energy consumption (DC Whmi) 65 Overall DC electrical energy captured from regenerative braking (DC Whmi) 45 Total number of trips 10,555 Total distance...

208

Monthly Summary Results for the Chrysler RAM PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

87 Overall DC electrical energy consumption (DC Whmi) 54 Overall DC electrical energy captured from regenerative braking (DC Whmi) 47 Total number of trips 6,560 Total distance...

209

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

3 Overall DC electrical energy consumption (DC Whmi) 4 Overall DC electrical energy captured from regenerative braking (DC Whmi) 43 Total number of trips 5,888 Total distance...

210

Monthly Summary Results for the Chrysler RAM PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

3 Overall DC electrical energy consumption (DC Whmi) 71 Overall DC electrical energy captured from regenerative braking (DC Whmi) 43 Total number of trips 13,167 Total distance...

211

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

15 Overall DC electrical energy consumption (DC Whmi) 13 Overall DC electrical energy captured from regenerative braking (DC Whmi) 27 Total number of trips 2,405 Total distance...

212

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

8 Overall DC electrical energy consumption (DC Whmi) 70 Overall DC electrical energy captured from regenerative braking (DC Whmi) 28 Total number of trips 1,225 Total distance...

213

Chrysler RAM PHEV Fleet Test Reports  

Broader source: Energy.gov (indexed) [DOE]

33 Overall DC electrical energy consumption (DC Whmi) 74 Overall DC electrical energy captured from regenerative braking (DC Whmi) 33 Total number of trips 5,273 Total distance...

214

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

4 Overall DC electrical energy consumption (DC Whmi) 65 Overall DC electrical energy captured from regenerative braking (DC Whmi) 28 Total number of trips 2,348 Total distance...

215

Chrysler Town & Country PHEV Fleet  

Broader source: Energy.gov (indexed) [DOE]

0 Overall DC electrical energy consumption (DC Whmi) 0 Overall DC electrical energy captured from regenerative braking (DC Whmi) 27 Total number of trips 1,579 Total distance...

216

Chrysler RAM PHEV Fleet Results Report  

Broader source: Energy.gov (indexed) [DOE]

4 Overall DC electrical energy consumption (DC Whmi) 72 Overall DC electrical energy captured from regenerative braking (DC Whmi) 44 Total number of trips 36,749 Total distance...

217

Section6.8.doc  

E-Print Network [OSTI]

9) The electric current I, in amps, in a circuit varies directly as the voltage V. When 16 ... 10) The stopping distance d of a car (in feet) after the brakes have been...

218

PHYS 101 Lecture 26 -Pascal's Principle 26 -1 2001 by David Boal, Simon Fraser University. All rights reserved; further copying or resale is strictly prohibited.  

E-Print Network [OSTI]

's important: Pascal's principle Demonstrations: Pascal's vases; books-on-a-bag (hydraulic press) Static. Pascal's principle underlies the operation of the hydraulic press, car brakes, etc. F same P everywhere F

Boal, David

219

E-Print Network 3.0 - acoustic flight tests Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

signal produced by lead brake on metalic test piece 1 To analyse the signal... ACOUSTIC EMISSION IN AEROSPACE STRUCTURES P.J. Wells W.A. Wright Advanced Information...

220

A Model-Driven Approach for Generating Embedded Robot Navigation Control Software  

E-Print Network [OSTI]

, which is symbolically represented as an area contaminated with hazardous materials (e.g., land mines engines and brakes, chemical factories, and avionics applications. In fact, it has been reported that over

Gray, Jeffrey G.

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Mechanical Proofs about Computer Programs Technical Report #41  

E-Print Network [OSTI]

shuttle fails to launch. An entire line of automobiles is recalled because of problems with the software that controls the braking system. Unauthorized users get access to computer systems. Sensitive information

Boyer, Robert Stephen

222

A University of Alabama Low-Cost Diamond-Coated Tools  

E-Print Network [OSTI]

composite engineered materials have Heat pipe Tool tip Metal-matrix composite engineered materials have (with heat pipe) Tool tip potential for engine pistons, brake parts, driveshafts, etc. Machining must

Carver, Jeffrey C.

223

NOTTINGHAM TRENT UNIVERSITY -INVESTING IN EXCELLENCE VICE-CHANCELLOR'S PHD SCHOLARSHIP SCHEME & SCHOOL PHD SCHOLARSHIP SCHEME  

E-Print Network [OSTI]

of the material and to assess the development of understanding using the new approach. At a time of national-university laboratory', Physics Education, 41(6), November 2006, pp556-559. Ireson G and Twidle J Magnetic braking

Evans, Paul

224

THEMENHEFT FORSCHUNG INTELLIGENTE FAHRZEUGE48 1. Targets for sustainable mobility  

E-Print Network [OSTI]

, lightweight material, and tire technology. Instead, also the operation of the vehicle has to be optimized potenti- als for fuel savings lies in the avoidance of unnecessary acceleration and brake actua- tion

Mbius, Bernd

225

Experiences in Applying Formal Verification in Robotics  

E-Print Network [OSTI]

and certifying a safety function for autonomous vehicles and robots. We out- line the algorithm which such as the area covered by a braking robot in our case, play a central role. This leads to an increase

Lth, Christoph - Deutschen Forschungszentrum fr Knstliche Intelligenz & Fachbereich 3

226

Mechanical Proofs about Computer Programs Technical Report #41  

E-Print Network [OSTI]

in unpredictable ways. A space shuttle fails to launch. An entire line of automobiles is recalled because of problems with the software that controls the braking system. Unauthorized users get access to computer

Boyer, Robert Stephen

227

Violations & Enforcement Parking Violation Definitions  

E-Print Network [OSTI]

Vehicles parked on a grade should have the emergency brake set. Keys should never be left in the ignition - Improper parking and failure to park within lines Improper parking includes parking compact vehicles

Hong, Jason I.

228

Antonio Diaz-Calderon Jet Propulsion Laboratory  

E-Print Network [OSTI]

@jpl.nasa.gov Alonzo Kelly The Robotics Institute Carnegie Mellon University On-Line Stability Margin and Attitude which move heavy loads, accelerate or brake aggressively, turn at speed, or operate on sloped terrain

Kelly, Alonzo

229

Steve Wright School of Computing  

E-Print Network [OSTI]

the effect of fatigue on driver atten- tion, event traf c might be scripted to form a stationary line ahead of the subject driver to measure the reaction time of the driver's braking responses (Ward, 1997). The second

Leeds, University of

230

Techniques for developing verified concurrent programs based on monitors and semaphores  

E-Print Network [OSTI]

course instructors of Memorial University for their valu- able lectures and course materials which of Engineering and Applied Science and Gerard Brake, ECE, for their administrative and technical as- sistance

Peters, Dennis

231

Computer-Aided Verification: How to Trust a Machine with Your Life  

E-Print Network [OSTI]

are used to control all sorts of devices -- from washing machines and microwave ovens to braking systems is formidable. The formal verification of a five-line algorithm can easily run into pages of dense mathematical

Pace, Gordon J.

232

WABCO Automotive UK Ltd is part of American Standard Companies Inc. One  

E-Print Network [OSTI]

automotive products companies, it supplies braking and other control systems to the commercial vehicle and the Institute for Materials Research. RESULTS Research and teaching benefited, with WABCO product studies

Berzins, M.

233

Robust yaw stability controller design and hardware-in-the-loop testing for a road vehicle  

E-Print Network [OSTI]

Unsymmetrical loading on a car like mu-split braking, side wind forces, or unilateral loss of tire pressure results in unexpected yaw disturbances that require yaw stabilization either by the driver or by an automatic ...

Guvenc, Levent

234

COASTAL HOUSEHOLD AIR TRAVEL SPORTS & RECREATION MANUFACTURING AUTOMOTIVE PUBLIC SAFETY MEDICAL GROCERY Search and Rescue at Sea Infrared Ear Thermometers Collision Avoidance Systems Shock-Absorbing Athletic Shoes Powdered Lubricants Improved Radial Tires  

E-Print Network [OSTI]

Power Plant Design Car Chassis and Brake Systems Face Masks and Fire Suits Artificial Limbs and Freeze-Drying Pollution Remediation Polished Brass Finish Virtual Biofeedback Training Helmets Rapid

235

Transportation and its Infrastructure  

E-Print Network [OSTI]

Evaluation of Hybrid Diesel-Electric Transit Buses - Finalof braking energy in diesel-electric vehicles (see the webCNG buses, hybrid diesel-electric buses and taxi renovation)

2007-01-01T23:59:59.000Z

236

Exascale for Energy: The Role of Exascale Computing in Energy Security  

E-Print Network [OSTI]

2010. Exascale for Energy Carbon capture and sequestration:brakes on CO 2 emissions Carbon capture and sequestrationnecks for large-scale carbon capture and seques- tration.

Authors, Various

2010-01-01T23:59:59.000Z

237

Maintenance Sheet for 2013 Chevrolet Volt  

Broader source: Energy.gov (indexed) [DOE]

0DU103929 Date Mileage Description Cost 342013 4,876 Replaced relay assembly, engine control module, and 12V battery - under warranty NC 342013 4,876 Reflashed parking brake...

238

Maintenance Records for 2010 Toyota Prius vin#0462  

Broader source: Energy.gov (indexed) [DOE]

DU2A5010462 Date Mileage Description Cost 11232009 5,935 Changed oil and filter, rotated tires, and inspected brakes 31.75 12182009 13,330 Changed oil and filter and inspected...

239

Maintenance Records for 2010 Ford Fusion vin#4757  

Broader source: Energy.gov (indexed) [DOE]

Ford Fusion VIN 3FADP0L34AR144757 Date Mileage Description Cost 1142010 6,330 Changed oil and filter and inspected brake system 46.83 2112010 12,302 Changed oil and filter...

240

Maintenance Records for 2010 Honda Insight EX vin 0141  

Broader source: Energy.gov (indexed) [DOE]

Insight EX VIN JHMZE2H78AS010141 Date Mileage Description Cost 12102009 5,947 Changed oil and filter and inspected brake system 30.44 252010 11,011 Changed oil and filter and...

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Message froM DonalD fisher It is hard to believe that the summer is over. I hope you were able to find time for  

E-Print Network [OSTI]

- Optical, Altra Electric Clutch Brake Group, Sola Block, Savage Arms, New England Wire, and the Black Energy Council Institute (NECEC Institute) has announced that Black Island Wind Turbines of Springfield

Massachusetts at Amherst, University of

242

Transportation and its Infrastructure  

E-Print Network [OSTI]

system for international aviation, Study carried out for ICAO, London, UK IEA Hybrid, 2006: International Energysystems, store regenerative braking energy and to operate the powerful motor drives needed for hybrid

2007-01-01T23:59:59.000Z

243

Apparatus for stopping a vehicle  

DOE Patents [OSTI]

An apparatus for externally controlling one or more brakes on a vehicle having a pressurized fluid braking system. The apparatus can include a pressurizable vessel that is adapted for fluid-tight coupling to the braking system. Impact to the rear of the vehicle by a pursuit vehicle, shooting a target mounted on the vehicle or sending a signal from a remote control can all result in the fluid pressures in the braking system of the vehicle being modified so that the vehicle is stopped and rendered temporarily inoperable. A control device can also be provided in the driver's compartment of the vehicle for similarly rendering the vehicle inoperable. A driver or hijacker of the vehicle preferably cannot overcome the stopping action from the driver's compartment.

Wattenburg, Willard H. (Walnut Creek, CA); McCallen, David B. (Livermore, CA)

2007-03-20T23:59:59.000Z

244

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

245

INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF PHYSICS D: APPLIED PHYSICS J. Phys. D: Appl. Phys. 38 (2005) 14021409 doi:10.1088/0022-3727/38/9/012  

E-Print Network [OSTI]

belt drives, brakes, tyres and clutches in automobiles and in other machines; gears devices; robotic manipulator joints; the motion of a human knee-joint (natural or artificial) and walking

Müftü, Sinan

246

Just build it! : a fully functional concept vehicle using robotic wheels  

E-Print Network [OSTI]

Interest in electric vehicle drive units is resurging with the proliferation of hybrid and electric vehicles. Currently emerging key-technologies are: in-wheel motors, electric braking, integrated steering activators and ...

Schmitt, Peter, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

247

RESEARCH ARTICLE Controlling speed and direction during interception  

E-Print Network [OSTI]

. Turning rate was controlled using a steering wheel and speed was controlled using a foot pedal (Wann and Land 2000), braking (Lee 1976; Yilmaz and Warren 1995), and fly ball catching (Chapman 1968

248

Proceedings of the XIV Colloquium on Musical Informatics (XIV CIM 2003), Firenze, Italy, May 8-9-10, 2003 AN INTRODUCTORY CATALOG OF COMPUTER-SYNTHESIZED CONTACT SOUNDS, IN  

E-Print Network [OSTI]

Rolling Roller Dropping Plastic Bottle Sound models Falling, then rolling Ball Falling Coin Rolling & Braking Wheel Squeaking Door Rubbed Glass Walking on Gravel Invisiball Breaking Glass Crumpling Figure 1

Fontana, Federico

249

Vibration Isolation of a Locomotive Mounted Energy Storage Flywheel  

E-Print Network [OSTI]

Utilizing flywheels to store and reuse energy from regenerative braking on locomotives is a new technology being developed in the Vibration Control and Electromechanics Lab at Texas A&M. This thesis focuses on the motion analysis of a locomotive...

Zhang, Xiaohua

2011-02-22T23:59:59.000Z

250

SUPPORTING INFORMATION for Modeling the Atmospheric Transport and Deposition  

E-Print Network [OSTI]

, James Quigley, Joyce E. Rosenthal1 Center for the Biology of NaturalSystems, Queens College, Flushing Mathewson-Brake Ontario Ministry of Natural Resources, Peterborough, Ontario, Canada John . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 M. Summary of Sensitivity Analyses. . . . . . . . . . . . . . . . . . . . . . . . . . . 42 N

251

Overview of the Advanced Combustion Engine R&D  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

high-efficiency engines using hydrocarbon-based (petroleum and non-petroleum) fuels and hydrogen Light-Duty Heavy-Duty 2010 2015 2015 2018 Engine brake thermal efficiency 45% 50%...

252

Chapter 9 -Forklift Operations Forklift Operations Safety Rules  

E-Print Network [OSTI]

, or hazardous locations. 19. Operators should not put their fingers, arms, or legs between the uprights that horn, lights, brakes, tires, gas supply, hydraulic lines, etc. are in safe working condition. Employees

253

Using phosphate rock to immobilize metals in soil and increase arsenic uptake by hyperaccumulator Pteris vittata  

E-Print Network [OSTI]

as a by-product of copper (Cu) and lead (Pb) smelters (Bagga and Peterson, 2001). Smelting and mining (Chinese Brake fern) was found growing on a site in Central Florida contami- nated with chromated copper

Ma, Lena

254

Note: Index has not been updated to reflect revisions to Chapters 2, 5 and new 11. AASHTO Green Book, 3-21 ballistic, 3-8  

E-Print Network [OSTI]

, 6-20 aging eyes, 3-16 air pollutant levels, 7-15 air pollutants, 7-13, 7-14 air pollution, 7-13 air-8 bifurcation behavior, 5-15 acceleration control, 3-24 block length, average, 6-20, 6-20, 6-22 acceleration-36 adaptive signals, 9-19 brake and carburetion systems, 7-8 adaptive signal control, 9-27 braking inputs, 3

Bertini, Robert L.

255

EXPERIMENTAL INVESTIGATION OF PERFORMANCE PARAMETERS OF SINGLE CYLINDER FOUR STROKE DI DIESEL ENGINE OPERATING ON NEEM OIL BIODIESEL AND ITS BLENDS  

E-Print Network [OSTI]

Increasing oil prices, and global warming activates the research and development of substitute energy resources to maintain economic development. The methyl esters of vegetable oil, known as biodiesel are becoming popular because of their low ecological effect and potential as a green substitute for compression ignition engine. The main objective of this study is to investigate the performance of neem oil methyl ester on a single cylinder, four stroke, direct injection, and 8 HP capacity diesel engine. The Experimental research has been performed to analyze the performance of different blends 20 % (BD20), 50 % (BD50), and 100 % (BD100) of neem oil biodiesel. Biodiesel, when compared to conventional diesel fuel, results showed that the brake specific fuel consumption and brake specific energy consumption are higher and brake thermal efficiency less during testing of engine. The brake specific energy consumption is increased by 0.60 % to 8.25 % and brake thermal efficiency decreased by 0.57 % to 7.62 % at 12 kg engine brake load as compared to diesel fuel. When the fuel consumption of biodiesel is compared to diesel fuel it observed that the fuel consumption was increased by 2.5 % to 19.5 % than that of diesel fuel for B20, B50 and B100 bends at 12 kg engine brake load. It is observed that the performance of biodiesel blends is less as compared to plain diesel and during testing of diesel engine run normally for all engine loads. It is investigated that the neem oil biodiesel 20 % blend showed very close performance when compared to plain diesel and hence can be used as an alternative fuel for conventional diesel in the future.

Rob Res; Dharmendra Yadav; Nitin Shrivastava; Vipin Shrivastava

256

Design and fabrication of advanced materials from Illinois coal wastes. [Quarterly] technical report, September 1--November 30, 1994  

SciTech Connect (OSTI)

The main goal of this project is to develop a bench-scale procedure to design and fabricate advanced brake and structural composite materials from Illinois coal combustion residues. During the first quarter of the project, the thrust of the work was directed towards setting up the experimental facilities and undertaking preliminary tests to gauge the ability of coal tar derived binder in fabricating the brake skeletons. In addition systematic scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and differential thermal analysis (DTA) were conducted on PCC fly ash (Baldwin), fly ash (ADM), FBC fly ash, FBC spent bed bottom ash, bottom ash (ADM), and scrubber sludge residues to characterize their geometrical shape and thermal stability. The PCC fly ash particles being highly spherical in shape and thermally inert up to 1100{degrees}C will make an excellent raw material for our composites. This is born out by fabricating brake skeletons from PCC fly ash colloids. Unlike the PCC fly ash and FBC fly ash, the scrubber sludge particles are not suitable hosts for our brake lining materials because of a whisker-like particle structure. Six different compositions of various combustion residues were tested in the fabrication of brake skeletons, and our tar derived binder shows great promise in the fabrication of composite materials.

Malhotra, V.M.; Wright, M.A. [Southern Illinois Univ., Carbondale, IL (United States)

1994-12-31T23:59:59.000Z

257

Heel and toe driving on fuel cell vehicle  

DOE Patents [OSTI]

A system and method for providing nearly instantaneous power in a fuel cell vehicle. The method includes monitoring the brake pedal angle and the accelerator pedal angle of the vehicle, and if the vehicle driver is pressing both the brake pedal and the accelerator pedal at the same time and the vehicle is in a drive gear, activating a heel and toe mode. When the heel and toe mode is activated, the speed of a cathode compressor is increased to a predetermined speed set-point, which is higher than the normal compressor speed for the pedal position. Thus, when the vehicle brake is removed, the compressor speed is high enough to provide enough air to the cathode, so that the stack can generate nearly immediate power.

Choi, Tayoung; Chen, Dongmei

2012-12-11T23:59:59.000Z

258

Rubber friction and tire dynamics  

E-Print Network [OSTI]

We propose a simple rubber friction law, which can be used, e.g., in models of tire (and vehicle) dynamics. The friction law is tested by comparing numerical results to the full rubber friction theory (B.N.J. Persson, J. Phys.: Condensed Matter 18, 7789 (2006)). Good agreement is found between the two theories. We describe a two-dimensional (2D) tire model which combines the rubber friction model with a simple mass-spring description of the tire body. The tire model is very flexible and can be used to calculate accurate mu-slip (and the self-aligning torque) curves for braking and cornering or combined motion (e.g., braking during cornering). We present numerical results which illustrate the theory. Simulations of Anti-Blocking System (ABS) braking are performed using two simple control algorithms.

B. N. J. Persson

2010-07-16T23:59:59.000Z

259

Final report for CCS cross-layer reliability visioning study  

SciTech Connect (OSTI)

The geometric rate of improvement of transistor size and integrated circuit performance known as Moore's Law has been an engine of growth for our economy, enabling new products and services, creating new value and wealth, increasing safety, and removing menial tasks from our daily lives. Affordable, highly integrated components have enabled both life-saving technologies and rich entertainment applications. Anti-lock brakes, insulin monitors, and GPS-enabled emergency response systems save lives. Cell phones, internet appliances, virtual worlds, realistic video games, and mp3 players enrich our lives and connect us together. Over the past 40 years of silicon scaling, the increasing capabilities of inexpensive computation have transformed our society through automation and ubiquitous communications. Looking forward, increasing unpredictability threatens our ability to continue scaling integrated circuits at Moore's Law rates. As the transistors and wires that make up integrated circuits become smaller, they display both greater differences in behavior among devices designed to be identical and greater vulnerability to transient and permanent faults. Conventional design techniques expend energy to tolerate this unpredictability by adding safety margins to a circuit's operating voltage, clock frequency or charge stored per bit. However, the rising energy costs needed to compensate for increasing unpredictability are rapidly becoming unacceptable in today's environment where power consumption is often the limiting factor on integrated circuit performance and energy efficiency is a national concern. Reliability and energy consumption are both reaching key inflection points that, together, threaten to reduce or end the benefits of feature size reduction. To continue beneficial scaling, we must use a cross-layer, Jull-system-design approach to reliability. Unlike current systems, which charge every device a substantial energy tax in order to guarantee correct operation in spite of rare events, such as one high-threshold transistor in a billion or one erroneous gate evaluation in an hour of computation, cross-layer reliability schemes make reliability management a cooperative effort across the system stack, sharing information across layers so that they only expend energy on reliability when an error actually occurs. Figure 1 illustrates an example of such a system that uses a combination of information from the application and cheap architecture-level techniques to detect errors. When an error occurs, mechanisms at higher levels in the stack correct the error, efficiently delivering correct operation to the user in spite of errors at the device or circuit levels. In the realms of memory and communication, engineers have a long history of success in tolerating unpredictable effects such as fabrication variability, transient upsets, and lifetime wear using information sharing, limited redundancy, and cross-layer approaches that anticipate, accommodate, and suppress errors. Networks use a combination of hardware and software to guarantee end-toend correctness. Error-detection and correction codes use additional information to correct the most common errors, single-bit transmission errors. When errors occur that cannot be corrected by these codes, the network protocol requests re-transmission of one or more packets until the correct data is received. Similarly, computer memory systems exploit a cross-layer division of labor to achieve high performance with modest hardware. Rather than demanding that hardware alone provide the virtual memory abstraction, software page-fault and TLB-miss handlers allow a modest piece of hardware, the TLB, to handle the common-case operations on a cyc1e-by-cycle basis while infrequent misses are handled in system software. Unfortunately, mitigating logic errors is not as simple or as well researched as memory or communication systems. This lack of understanding has led to very expensive solutions. For example, triple-modular redundancy masks errors by triplicating computations in either time or area. T

Quinn, Heather M [Los Alamos National Laboratory; Dehon, Andre [U. PENN; Carter, Nicj [INTEL

2010-12-20T23:59:59.000Z

260

N d'ordre : 69 -2011 Anne 2010/2011 THESE DE L`UNIVERSITE DE LYON  

E-Print Network [OSTI]

; __________________________________________________________________________________________ Title : Study of reliability and aging of supercapacitor storage system for partial and punctual supplying of a trolley through the recovery of braking energy. Component to the storage system approach. Summary: The first objective of the HYBUS project is to integrate a supercapacitor storage system

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Analysis and Design of a Novel Three-Level LLCC Inverter Supplying an Airborne Piezoelectric  

E-Print Network [OSTI]

Analysis and Design of a Novel Three-Level LLCC Inverter Supplying an Airborne Piezoelectric Brake on the investigation of a novel single-phase three-level PWM inverter in the kW power range, feeding a high power multi suit best to the needs of ultrasonic motors has been conducted. A resonant inverter with LLCC

Paderborn, Universität

262

Princeton Plasma Physics Laboratory NSTX Experimental Proposal  

E-Print Network [OSTI]

Operations Chit Review Board (designated by Run Coordinator) MINOR MODIFICATIONS (Approved by Experimental and detailed nature of the inertial effects and dissipation mechanisms have yet to be determined. The strength, and neoclassical effects. Active braking of the plasma rotation by externally applied fields will be used to alter

Princeton Plasma Physics Laboratory

263

Princeton Plasma Physics Laboratory NSTX Experimental Proposal  

E-Print Network [OSTI]

Responsible Division: Experimental Research Operations Chit Review Board (designated by Run Coordinator) MINOR redistribution and loss of fast ions resulting from the bursts. In addition, eternal braking fields eigenfunctions. Comparison with calculated BAAE eigenfunctions will improve understanding of the exact nature

Princeton Plasma Physics Laboratory

264

Computer controlled synchronous shifting of an automatic transmission  

DOE Patents [OSTI]

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements.

Davis, Roy I. (9214 Abbey La., Ypsilanti, MI 48198); Patil, Prabhakar B. (10294 W. Outer Dr., Detroit, MI 48223)

1989-01-01T23:59:59.000Z

265

Computer controllable synchronous shifting of an automatic transmission  

DOE Patents [OSTI]

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements. 6 figs.

Davis, R.I.; Patil, P.B.

1989-08-08T23:59:59.000Z

266

www.cnrs.fr NATIONAL PRESS RELEASE I PARIS I 17 FEBRUARY 2013  

E-Print Network [OSTI]

time) on 17/02/2013 No matter how intimidating their name, supercapacitors are part of our daily lives. Take buses for example: supercapacitors are charged during braking and supply electricity to open supercapacitors while in operation. The technique devised by the scientists provides a new tool for optimizing

van Tiggelen, Bart

267

Introduction to special section on the Phoenix Mission: Landing Site Characterization Experiments, Mission Overviews, and  

E-Print Network [OSTI]

braking strategy. After a safe landing, twin fan-like solar panels are unfurled and provide the energy lander with a science payload inherited from MPL and 2001 instruments gives significant advantages, University of Ottawa, Ottawa, Ontario, Canada. 10 Max Planck Institute for Solar System Research, Katlenburg

Duck, Thomas J.

268

High voltage bus and auxiliary heater control system for an electric or hybrid vehicle  

DOE Patents [OSTI]

A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to the vehicle's high voltage bus and is thermally coupled to a coolant loop containing a heater core for the vehicle's climate control system. The system controller responds to cabin heat requests from the climate control system by generating a pulse width modulated signal that is used by the control circuit to operate the heater at a duty cycle appropriate for the amount of cabin heating requested. The control system also uses the heater to dissipate excess energy produced by an auxiliary power unit and to provide electric braking when regenerative braking is not desirable and manual braking is not necessary. The control system further utilizes the heater to provide a safe discharge of a bank of energy storage capacitors following disconnection of the battery or one of the high voltage connectors used to transmit high voltage operating power to the various vehicle systems. The control circuit includes a high voltage clamping circuit that monitors the voltage on the bus and operates the heater to clamp down the bus voltage when it exceeds a pre-selected maximum voltage. The control system can also be used to phase in operation of the heater when the bus voltage exceeds a lower threshold voltage and can be used to phase out the auxiliary power unit charging and regenerative braking when the battery becomes fully charged.

Murty, Balarama Vempaty (West Bloomfield, MI)

2000-01-01T23:59:59.000Z

269

Work Request Form -Georgia Tech Motor Pool Vehicle Number ___________________ Date: _____________________ Department: ________________________  

E-Print Network [OSTI]

are experiencing) ____ Not Heating ____ Not Cooling Electrical and Electronics Systems (Please mark what best fits Signal Out Brake System/ Suspension and Steering (Please mark what best fits the description of the issue/ hard pedal Heating and A/C (Please mark what best fits the description of the issue you

270

Performance and Emission Characteristics of an Aircraft Turbo Diesel Engine using JET-A Fuel  

E-Print Network [OSTI]

Protection Agency (EPA)............................................................ 10 1.4.3 Emission Technology .................................................................................................... 11 1.4.3.1 Catalytic Converter... Actual e Exit f Fuel inf Free Stream o Point Pr Prop T Thrust x Compound Family viii Abbreviations Definition AFR Air Fuel Ratio BHP Brake Horsepower CED Compact Engine Display CFR Code of Federal Regulations CReSIS Center for Remote...

Underwood, Sean Christopher

2008-05-05T23:59:59.000Z

271

Fault-tolerance in an Embedded Steering Robot: a hybrid approach  

E-Print Network [OSTI]

, i.e. using the actual steering wheel, fuel paddle and braking paddle. For such an autonomous robot is a device capable of driving a vehicle fully automatically using the same interface as a human driver does- lab/Simulink to simulate the behavior of the whole system: vehicle, robot and embedded software

Cuijpers, Pieter

272

Environmental and Experimental Botany 51 (2004) 121131 Effects of arsenic species and phosphorus on arsenic  

E-Print Network [OSTI]

.Q. Maa,, G.E. MacDonaldb, B. Bondadaa a Soil and Water Science Department, University of Florida by P, and to quickly produce thiols might have both contributed to the capability of Chinese Brake fern of anthropogenic activities. Phytoremediation is fast emerging as a remediation technology to decontaminate

Ma, Lena

273

Associate Professor Visiting Scholar  

E-Print Network [OSTI]

efficient and environment friendly compared with conventional vehicles that are powered by internal optimization of the power sources and the recovery of vehicle kinetic energy during braking and coasting the algorithms for the operation control and optimization of a parallel hybrid electric vehicle 4 . Based

Mi, Chunting "Chris"

274

Milli-Biology Programmable Matter  

E-Print Network [OSTI]

with engineered materials, in order to expand the range of length scales and properties beyond what is available gearing at low RPM, and power is required to maintain static position, requiring holding brakes. But this is exactly the regime needed for programmable materials; electropermanent motors are efficient at low RPM

Ishii, Hiroshi

275

During the Fall 2010 college football season, a student who was also an employee of the University of Notre  

E-Print Network [OSTI]

, or surface in poor condition, with the lift in an elevated position, or used with brakes that are not properly set A worker being electrocuted if the lift makes contact with electrical lines. How to Reduce lines, transformers) Student Worker Killed While Filming Football Practice from a Scissor Lift 1

Garousi, Vahid

276

Faculty of Engineering Institute of Design, Robotics  

E-Print Network [OSTI]

of materials and systems including small-scale and full-size brake dynamometers The University's Charterhouse materials, structures and optimisation techniques. The outcomes of this research is applied to automotive: Control & Dynamics, Design, Strengths of Materials. We have access to dedicated equipment including

Berzins, M.

277

Proceedings of the Workshop on Open Infrastructures and Analysis Frameworks for HLT, pages 93100, Dublin, Ireland, August 23rd 2014.  

E-Print Network [OSTI]

workflow requires time, creating a natural brake on the need to acquire new resources. Grid infrastructure in a header presented when the software was invoked at the commend line. However, users of web services may never see a source code repository or a command line. This work is licenced under a Creative Commons

278

Extended Markov Tracking with an Application to Control Zinovi Rabinovich and Jeffrey S. Rosenschein  

E-Print Network [OSTI]

dynamics which operates in an on-line fashion, during in- teraction with the system. Existence of a simple the environment, and applies brakes as nec- essary. It is the interaction of these two levels that results explanation of its ongoing interaction with the environment. Pursuing this demand for simplicity and the on-line

Rosenschein, Jeff

279

Topics in Vision and Richard Hartley  

E-Print Network [OSTI]

motor Brake linear actuator Experimental Vehicle #12;Speed Sign Detection& Recognition High, areas Circles remain circles Straight lines remain lines #12;Concepts of Euclidean Geometry Circle undergo when you take an image of it with a pinhole camera? #12;Parallel lines are not preserved #12

Li, Hongdong

280

Reinforcement Learning by ValueReinforcement Learning by Value GradientsGradients  

E-Print Network [OSTI]

line shows flight. The corresponding actual flight: Entire animation is summarised by a single "long exposure photograph". #12;State-space diagrams (second example braking as late as possible is optimal) State-space view. Blue line shows flight. Green is theoretical optimal behaviour. The corresponding

Weyde, Tillman

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Tau-Coupling Revisited 103 When Is Behavioral Data  

E-Print Network [OSTI]

and the moving target. In line with the theory, previous research has found a linear relationship between we will discuss this theory and argue that although the presented experimental results are in line variable tau in the context of visually con- trolling the braking of a car. He showed that tau

Jegelka, Stefanie

282

New active safety device dedicated to light all-terrain vehicle stability: Application to quad bike and off-road  

E-Print Network [OSTI]

. It consists in using Predictive Functional Control (PFC) so as to compute, on-line, the maximum vehicle and braking control [3] and [2]), they appear to be poorly relevant for fast off-road motion context (since]. It consists in the on-line adaptation of tire cornering stiffnesses, representative of grip conditions, based

Boyer, Edmond

283

Eigenmode Identification in Campbell Diagrams Krisztian Buza, Christine Preisach, Andre Busche, Lars Schmidt-Thieme  

E-Print Network [OSTI]

be approximated by lines (as linear terms usually dominate). Analysis of Campbell diagrams is usually performed to rotational motion. In Campbell diagrams, eigenmodes are represented as nearly horizontal lines. Excitation., the component brakes after a number of cycles [1]. Campbell diagrams are usually recorded during engine tests

Schmidt-Thieme, Lars

284

iTDi Blog for teachers by teachers Critical Thinking Adam  

E-Print Network [OSTI]

'. Assessors are obsessed with coverage. If material has been covered, it can be tested. If it can be tested is merely a symptom of what we are presented with in published course materials. Consider this: every learners to step on the brakes of a car that is already parked. Rather than more and more content being

Yanikoglu, Berrin

285

Safe Longitudinal Platoons of Vehicles without Communication Alexis Scheuer, Olivier Simonin and Franois Charpillet  

E-Print Network [OSTI]

brakes at maximum capacity. Collision avoidance of this model is proved. Finally, we show that this model it to form a train without grip material. In this paper we focus on the longitudinal platoon problem, by considering that vehicles are moving in a one dimensional space (along a line). As it has been shown

Simonin, Olivier -Dpartement Informatique, Institut National des Sciences Appliques de Lyon

286

Tensor Visualization Guiding Component Design  

E-Print Network [OSTI]

Insitute of Mathematics, University of Saarbrcken 5 Material Sciences, University of Saarbrcken #12;What do all these authors do? Applied problems require interdisciplinary teams: Material Science Markus Bernhard Burgeth #12;Engineering Problem Design of a brake lever (bike) Goal: Replace metal

Tanaka, Jiro

287

A Spatial Odyssey of the Interval Algebra: 1. Directed Intervals To appear in: Proceedings of the 17th International Joint Conference on Artificial Intelligence (IJCAI'01), Seattle, WA, August 2001.  

E-Print Network [OSTI]

as the underlying line. There are several differences of temporal and spatial intervals which have to be considered to the underlying line. We de- velop an algebra for qualitative spatial representa- tion and reasoning about of influence (such as safety margin, braking dis- tance, or reaction distance) could be represented

Renz, Jochen

288

A CASTOR WHEEL CONTROLLER FOR DIFFERENTIAL DRIVE WHEELCHAIRS  

E-Print Network [OSTI]

on the front axis), and the tire material (rubber), the addi- tional force to change the angle of the castor by the equipped laser scanners and brakes in time if an obstacle is danger- ously close to the wheelchair. During for different grounds and tire materials, but without a projection of these forces to the differential drive

Bremen, Universitt

289

Adaptive Integrated Maintenance and Operation  

E-Print Network [OSTI]

sensors Unknown remaining life of components Sudden changes in demand or supply of raw materials #12 Sudden changes in demand or supply of raw materials Bayesian Statistics to handle uncertainties in the railway context Anomaly detection and prognosis of brake pad wear Detecting arcing and predicting wear

290

Software Engineering Education Mark A. Ardis  

E-Print Network [OSTI]

- plex. Today's top-of-the-line automobiles have hundreds of millions of lines of software, and even low-end cars have tens of millions of lines of code. Of course, predictions are that the size and complexity and control our car remotely over the Internet." The authors of the study were able to disable the brakes

Ardis, Mark

291

Safety and Line Capacity in Railways An Approach in Timed CSP  

E-Print Network [OSTI]

Safety and Line Capacity in Railways An Approach in Timed CSP Yoshinao Isobe1 , Faron Moller2 or moving a train through a node takes time, and sighting and braking dis- tance are both functions of time-Verlag Berlin Heidelberg 2012 #12;Safety and Line Capacity in Railways 55 effort to explain our formal models

Moller, Faron G.

292

2014 Design Report Introduction  

E-Print Network [OSTI]

standard performance test procedures, laying a base line for next year's improvements. 2. Important design accuracy. 3. Decision making: Material and design: High strength Magnesium alloy was chosen for most parts in multiple load scenarios turn, brake, acceleration and combined action. The final masses of the uprights

Rimon, Elon

293

Carbon 41 (2003) 11751180 Thermomechanical behavior of a graphite foam  

E-Print Network [OSTI]

greater than that of electronics cooling, brake and clutch cooling, oven wall copper [3]. lining, etc-Coronado , D.D.L. Chung Composite Materials Research Laboratory, University at Buffalo, State University of New analysis; D. Viscoelasticity; D. Mechanical properties 1. Introduction K [3]. The material is derived from

Chung, Deborah D.L.

2003-01-01T23:59:59.000Z

294

Table Of Contents Section: Page  

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-runaway devices, brakes, backstops, or other safeguards shall be installed to protect persons from injury in the area or on the equipment and, where feasible, areas barricaded or lines marked on the ground, pan guards, or the equivalent if there is a potential for material to fall off the conveyor

US Army Corps of Engineers

295

Physics 207 Lecture 6 Physics 207: Lecture 6, Pg 1  

E-Print Network [OSTI]

/ dry pavement 0.30.4brake lining / iron 0.020.022metal / ice 0.050.1add grease to steel 0.40.6steel / steel µk = kinetic frictionµs = static frictionMaterial on Material #12;Page 3 Physics 207 ­ Lecture 6

Winokur, Michael

296

Supplementary Figure 1. Colorectal tumor cells accumulate features that suppress the activity of E2F1 and enhance the activity of -catenin. In normal cells canonical Wnt  

E-Print Network [OSTI]

a potential brake on -catenin activity: E2F1 inhibits -catenin- mediated activation of c-MYC, and activates adhesions, metastasis, or epithelial-mesenchymal transition. For antibodies, see Materials and Methods. All a dE2F1RNAi transgene (line #3) using a patched-Gal4 promoter driver (ptc), and significant

Cai, Long

297

THE CITY UNIVERSITY OF NEW YORK Classified Civil Service Position Description  

E-Print Network [OSTI]

, - Overhauls and makes repairs to internal combustion engines, brake systems, automatic and manual and orders, and maintains records and inventories of supplies and materials. - Accesses job related Class B Commercial Driver License within six (6) months of appointment. Direct Lines of Promotion FROM

Rosen, Jay

298

Tire-Wear Particles as a Source of Zinc to the Environment  

E-Print Network [OSTI]

(11, 15), brake linings (11, 15, 16), and rubber tires (9, 12, 17). Tire-wear particles have been.S. Geological Survey, MS 430, 12201 Sunrise Valley Drive, Reston, Virginia 20192 Tire-tread material has a zinc (Zn) content of about 1 wt %. The quantity of tread material lost to road surfaces by abrasion has

299

MAGNETIZED ACCRETION-EJECTION STRUCTURES: 2.5-DIMENSIONAL MAGNETOHYDRODYNAMIC SIMULATIONS OF CONTINUOUS IDEAL JET LAUNCHING FROM RESISTIVE ACCRETION DISKS  

E-Print Network [OSTI]

inside the disk brakes the matter azimuthally and allows for accre- tion, while it is responsible shell of dense material is the natural outcome of the inward advection of a primordial field. Subject optical forbidden lines emitted in the jets (see also Hartigan et al. 1995). In galactic systems

Casse, Fabien

300

Hindawi Publishing Corporation Journal of Biomedicine and Biotechnology  

E-Print Network [OSTI]

is not fully understood. Here we review information on the material properties of thick filaments, thin, ultrafast vibrations for sound production, and braking action for stopping movement. This diversity relies in response to loads or forces that vary with time. Muscle is also a highly structured biological material

Vigoreaux, Jim O.

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Visit to Nippondenso, July 29-30, 19911 Our hosts for this visit were Mr. Fukaya, General Manager of the Production  

E-Print Network [OSTI]

and controls, radiators, dashboard displays, brake control systems, and so on. It has manufacturing plants and manufactures products. Nippondenso is a high technology company. Basic and applied research cover materials (what we would call islands); in the 60's they had lines; in the 70's "areas," meaning presumably

Whitney, Daniel

302

AGRICHEMICAL FACT SHEET College of Agricultural Sciences Cooperative Extension  

E-Print Network [OSTI]

changes in regulations affecting over-the-road transport of hazardous materials have made it impor- tant- nents such as brakes, tires, and steering are in good working order. A poorly main- tained vehicle is should a mishap occur. Regularly inspect sprayer tanks, fittings and lines (especially those under

Kaye, Jason P.

303

American Society for Engineering Education, April 1-2, 2005 --Northern Illinois University, DeKalb, IL. 2005 IL/IN Sectional Conference  

E-Print Network [OSTI]

material and all the assignments are built around a central task. Students in the class write computer code, suspension, steering mechanism, brakes, tire mechanics, and more. Figure 1: Screen shots of NIU, limited in capability. In our new numerical methods course, students write hundreds of lines of computer

Kostic, Milivoje M.

304

General requirements. -1926.451 http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10752[3/30/2009 4:11:23 PM  

E-Print Network [OSTI]

material except as necessary for removal of such materials. 1926.451(f)(9) Where swinging loads are being hoisted onto or near scaffolds such that the loads might contact the scaffold, tag lines or equivalent for the functioning of brake and hoist mechanisms. 1926.451(f)(11) Suspension ropes shall be shielded from heat

Eisen, Michael

305

Codon-by-Codon Modulation of Translational Speed and Accuracy Via mRNA Folding  

E-Print Network [OSTI]

that mRNA secondary structures serve as elongation brakes to control the speed and hence the fidelity4]. However, several lines of evidence suggest that speedy elongation undermines translational accuracy when of the tradeoff between the speed and accuracy) [7]. Translational errors are harmful, because of the material

Zhang, Jianzhi

306

(Created 10/12) UNL Environmental Health and Safety (402) 472-4925 http://ehs.unl.edu  

E-Print Network [OSTI]

) stationary machines and equipment used to shape and/or form metal, wood, or other materials by cutting brakes, mechanical power presses, woodworking machinery, abrasive wheels, etc.) NFPA 79, Electrical machine motion (movement in a straight, continuous line) is another recognized hazard because a worker may

Farritor, Shane

307

This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research  

E-Print Network [OSTI]

- line (PANI) and manganese oxide (MnO2) nanoparticles. To enhance the interaction of MnO2 and PANI. The results demonstrated that PANI-ND-MnO2 nanocomposites are promising materials for supercapacitor electrode such as starting automotives and regenerating of brake energy. To date, carbon [25], transition metal oxides [6

Li, Yat

308

IEEE Citation Reference IEEE Publications uses Webster's College Dictionary, 4th Edition. For guidance on grammar and usage not included  

E-Print Network [OSTI]

. Brake, Ed. New York: Wiley, 1994, pp. 55-70. [3] R. L. Myer, "Parametric oscillators and nonlinear materials," in Nonlinear Optics, vol. 4, P. G. Harper and B. S. Wherret, Eds. San Francisco, CA: Academic. Lupatkin, "V-line surface-wave radiation and scanning," Dept. Elect. Eng., New York, Sci. Rep. 85, Aug

Bifano, Thomas

309

Department of Mechanical Engineering  

E-Print Network [OSTI]

Explore and understand applicable science Create new materials #12;Indian Railways #12;Wheel Impact Load automated system for On-Line estimation of Wheel Impact Loads and detection of Wheel Flats of running trains Detection System (WILD) #12;Derailment Mechanism Laboratory Tests Lab Brake Mechanism Placement of Sensors

Srivastava, Kumar Vaibhav

310

Distributions and impact factors of antimony in topsoils and moss in Ny-lesund, Nan Jia, Liguang Sun*, Xin He, Kehua You, Xin Zhou, Nanye Long  

E-Print Network [OSTI]

from the wearing of the brake lining around traffic road, and the deposition of road dust and aerosol, and the two dominant oxidation states in environmental materials are 3 and 5. Sb has been increasingly materials (Okkenhaug et al., 2011; He, 2007). Sternbeck et al. (2002) have shown that Sb was mainly released

Short, Daniel

311

A Brief Note is a short paper that presents a specific solution of technical interest in mechanics but which does not necessarily contain new general methods or results. A Brief Note should not exceed  

E-Print Network [OSTI]

words or equivalent (a typical one-column figure or table is equivalent to 250 words; a one line, the coefficient of thermal expansion, Poisson's ratio, and thermal conductivity for the material. Impo- sition- riety of engineering applications, including disk brakes and clutches (Lee and Barber, 1993

Barber, James R.

312

IODP Expedition 351: Izu Bonin Mariana Arc Origins Week 2 Report (27 June 2014)  

E-Print Network [OSTI]

compromised because the winch brakes would not release, but the problem (air in the hydraulic lines with the last line away from Honmoku Jetty, Berth 3, at 0552 h. Once clear, the sea passage to the first site a comprehensive core description scheme that covers all types of sedimentary materials potentially recovered

313

IMAGE SEGMENTATION FOR PHASE-CONTRAST HARD X-RAY CMT OF C/C Gerard L. Vignoles  

E-Print Network [OSTI]

;2 INTRODUCTION Carbon/carbon composites are well known high-performance materials for thermostructural applications, such as rocket nozzles or airplane brakes, and their market is in appreciable extension collected at the ID19 beam line of ESRF (European Synchrotron Radiation Facility). The strong brilliance

Paris-Sud XI, Université de

314

Lecture notes Introductory fluid mechanics  

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Lecture notes Introductory fluid mechanics Simon J.A. Malham Simon J.A. Malham (22nd February 2013 of fluid mechanics and along the way see lots of interesting applications. 2 Fluid flow 2.1 Flow A material essential to all modern car braking mechanisms. Fluids can be further subcatergorized. There are ideal

Malham, Simon J.A.

315

Lecture notes Ideal fluid mechanics  

E-Print Network [OSTI]

Lecture notes Ideal fluid mechanics Simon J.A. Malham Simon J.A. Malham (6th Feb 2010) Maxwell and in the process learn about the subtleties of fluid mechanics and along the way see lots of interesting are generally incompressible--a feature essential to all modern car braking mechanisms. Fluids can be further

Malham, Simon J.A.

316

Lecture notes Introductory fluid mechanics  

E-Print Network [OSTI]

Lecture notes Introductory fluid mechanics Simon J.A. Malham Simon J.A. Malham (17th March 2014 of fluid mechanics and along the way see lots of interesting applications. 2 Fluid flow, the Continuum are generally incompressible--a feature essential to all modern car braking mechanisms. Fluids can be further

Malham, Simon J.A.

317

MTDC Safety Sensor Technology Beyond the standard duty cycle data  

E-Print Network [OSTI]

MTDC Safety Sensor Technology Background Beyond the standard duty cycle data collection system used in the Department of Energy's Medium Truck Duty Cycle program, additional sensors were installed on three test Administration. The real-time brake stroke, tire pressure, and weight information obtained from these sensors

318

International Journal of Mechanical Sciences 44 (2002) 451464 Transient solution of a thermoelastic instability problem  

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several terms requires that the transient behaviour be generated by a sequence of operations in which, these solutions all assume that the sliding speed is constant, whereas actual brakes and clutches operate at variable sliding speed. The speed may be above critical at initial engagement, but dangerously high

Barber, James R.

319

Yaw stability control design through a mixed sensitivity approach V. Cerone, M. Milanese, D. Regruto  

E-Print Network [OSTI]

which aims at enhancing the vehicle yaw stability is the Vehicle Dynamics Control system (VDC). Indeed systems is to compensate for the driver's inadequacy and generate a control yaw moment through either steering or braking control inputs or both. VDC system directly controls yaw moment by generating

Regruto, Diego

320

NECEC 2008, ST. JOHN'S NEWFOUNDLAND, THURSDAY NOV 6, 2008 1 Abstract--Micro wind turbines are being used with some  

E-Print Network [OSTI]

system for the WH100 utilizes an off-vertical pivot separating the tail/yaw body section from the blade are offset by the installation costs and servicing of the multi-unit micro WEC systems. One of the primary casting due to the action of the furl-brake system (Roberts and Bruneau 2008). The over speed protection

Bruneau, Steve

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

LATERAL VEHICLE STABILIZATION USING CONSTRAINED NONLINEAR CONTROL  

E-Print Network [OSTI]

problems of designing a controller for the yaw dynamics are the nonlinearities which appear in the system, nonlinear systems, constraints. Abstract A lateral stabilization system for automotive vehicles is de of the vehicle during braking maneuvers. These systems were followed by traction control systems, which im- prove

Johansen, Tor Arne

322

VEHICLE DYNAMICS CONTROL WITH ROLLOVER PREVENTION FOR ARTICULATED HEAVY TRUCKS  

E-Print Network [OSTI]

in controlling vehicle yaw response. In this paper, a VDC system that improves yaw, lateral, and roll stability. The Vehicle Dynamics Control system (VDC) actively brakes individual wheels to directly influence vehicle yaw to generate a stabilizing yaw moment. VDC systems are typically designed so that application of differential

Peng, Huei

323

The Centre for Power Transmission  

E-Print Network [OSTI]

the stability of the system. Stability investigations Investigations into the effect of yaw inertia have been the efficacy of the Al- Ko automatic braking system, designed to aid the driver during an emergency, when the principles of yaw inertia at public events. In addition to this, a computer training `game' has been

Burton, Geoffrey R.

324

Operating Systems Introduction  

E-Print Network [OSTI]

by the environment" 4 Introduction (2) ¿ Examples of real-time systems: ¿ plant control ¿ control of production systems ¿ space missions ¿ household appliances ¿ virtual / augmented reality #12;3 5 Introduction (3 of application: ¿ Automotive: · power-train control, air-bag control, steer by wire, brake by wire ¿ Aircraft

Bogliolo, Alessandro

325

Port Authority of Allegheny County: Green Facts Hybrid Buses  

E-Print Network [OSTI]

28 hybrid diesel-electric buses in its fleet. · A diesel-electric hybrid drive system stores energy to supplement the diesel engine when needed and offers many benefits: o Compared to diesel buses, hybrids mileage than diesel-only buses and also achieve better acceleration. o A hybrid's brakes and engine

Sibille, Etienne

326

Automated Vehicle-to-Vehicle Collision Avoidance at Intersections  

E-Print Network [OSTI]

Automated Vehicle-to-Vehicle Collision Avoidance at Intersections M. R. Hafner1 , D. Cunningham2 on modified Lexus IS250 test vehicles. The system utilizes vehicle-to-vehicle (V2V) Dedicated Short the velocities of both vehicles with automatic brake and throttle commands. Automatic commands can never cause

Del Vecchio, Domitilla

327

LPV/H controller for vehicle handling and stability enhancement M. DOUMIATI 1  

E-Print Network [OSTI]

LPV/H controller for vehicle handling and stability enhancement M. DOUMIATI 1 , O. SENAME 1 , J Laboratory, Computer and Automation Research Institute, Budapest, HUNGARY, e-mail: {gaspar, szabo, bokor with steering/braking coordination task, for automotive vehicle yaw control scheme. Because of the tire

Paris-Sud XI, Université de

328

Role of Friction in Materials Selection for Automotive Applications  

SciTech Connect (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

329

1-4244-0449-5/06/$20.00 2006 IEEE IPEMC 2006 Fig. 1 Prototype of piezoelectric actuator  

E-Print Network [OSTI]

components such as transformer and inductor [9]. A model based control of a resonant inverter with LC Investigation of Power Supplies for a Piezoelectric Brake Actuator in Aircrafts Rongyuan Li, Norbert Frhleke, Hermann Wetzel, Joachim Bcker Institute of Power Electronics and Electrical Drives University

Paderborn, Universitt

330

What is about future high speed power line communication systems for in-vehicles networks ?  

E-Print Network [OSTI]

by car manufacturers to fulfil the different communications between electronic control units (ECU related to the steering, traction, braking system (ABS), Electronic Stability Program (ESP), Electric of splicing that is necessary, as well as simplify and lighten the cable bundles The HomePlug Powerline

Paris-Sud XI, Université de

331

Solar Powered Commuter Vehicle Sponsored by: Andy Schoenberg, Ph.D. of SunzeeCar LLC. ; Advisor: Kent Udell, Ph. D.  

E-Print Network [OSTI]

an optimal speed of 40 mph. Thep p p graph below depicts the power usage over timeg p p p g for a single stop the system without Regenerative Braking · Convert an Average of 50% of Kineticg Energy Back into Electrical Energy · Increase the Range from 30 miles to 40g miles. (10 mile increase) Testing:g The car was driven

Provancher, William

332

Alternative Fuel Implementation Tool Kit Case Study on Electric Vehicles  

E-Print Network [OSTI]

in vehicle price. However, Durham's vendor did not agree to such a transfer. Durham used several specific The existing duty cycle/application was feasible for the 70-mile typical driving range of the LEAF The vehicle, brake and fluid checks as well as preventive diagnostics, with no need for oil changes. The LEAF's high

333

ORIGINAL ARTICLE The Effect of Foot and Ankle Prosthetic Components on  

E-Print Network [OSTI]

-9. Objective: To assess the influence of energy storage and return (ESAR) prosthetic feet and multi-axis ankles on ground reaction forces and loading asymmetry between lower limbs in transtibial amputees. Design: The anteroposterior ground re- action force impulse, peak ground reaction forces, and braking and propulsion impulse

334

This document contains the draft version of the following paper: W. Bejgerowski, J.W. Gerdes, S.K. Gupta, and H.A. Bruck. Design and fabrication of miniature  

E-Print Network [OSTI]

members, (b) the reduction in backlash, and (c) potential energy storage in deflected members [2]. Using for a flapping wing micro air vehicle. Methods described in this paper are applicable to any lightweight, load-constant-force compression mechanisms, near-constant-force electrical connectors, bicycle brakes, bicycle derailleur

Gupta, Satyandra K.

335

Energy Management for an Onboard Storage System Based on Multi-Objective Optimization  

E-Print Network [OSTI]

Energy Management for an Onboard Storage System Based on Multi-Objective Optimization Tobias Knoke an onboard energy storage, the overhead line peak power and energy consumption can be reduced. The storage. This can be achieved by using an onboard energy storage, which recuperates the power during the braking

Paderborn, Universität

336

On computing a cell decomposition of a real surface containing infinitely many singularities  

E-Print Network [OSTI]

@nd.edu, www.nd.edu/sommese 5 General Motors Research and Development, USA charles.w.wampler@gm.com, www Introduction Polynomial systems appear throughout the sciences, engineering, and mathe- matics. Given algebraic set #12;2 Bates-Brake-Hauenstein-Sommese-Wampler meets a general linear space of complementary

Hauenstein, Jonathan

337

The New PulsarSupernova Remnant System PSR J1119\\Gamma6127 and SNR  

E-Print Network [OSTI]

). The mean MJD of this observation (51404.4) is just six days after a glitch reported by Camilo et al. (2000:31 \\Theta 10 \\Gamma23 Epoch of period (MJD) 51398 48355.00 Braking index, n 2:91 \\Sigma 0:01 2:837 \\Sigma 0

338

Energy Conversion DevicesEnergy Conversion Devices Fuel Cell Electrocatalyst Development Program  

E-Print Network [OSTI]

Energy Conversion Devices Fuel cells are a critical component in the Ovonic total hydrogen system approach. #12 catalysts for air electrodes for the ORFC * Ovonic Regenerative Fuel Cell #12;Texaco Ovonic Fuel Cell Ovonic Fuel Cell Company, LLC non-precious metal catalysts regenerative braking energy absorption

339

Voltage control on a train system  

DOE Patents [OSTI]

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as "Interference During Acceleration", "Interference Near Station Stops", and "Interference During Delay Recovery." Managing such interference avoids unnecessary brake/acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake/acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking/accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Gordon, Susanna P.; Evans, John A.

2004-01-20T23:59:59.000Z

340

Method of managing interference during delay recovery on a train system  

DOE Patents [OSTI]

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as "Interference During Acceleration", "Interference Near Station Stops", and "Interference During Delay Recovery." Managing such interference avoids unnecessary brake/acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake/acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking/accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Gordon, Susanna P.; Evans, John A.

2005-12-27T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Statistics of Entropy Production in Linearized Stochastic System  

E-Print Network [OSTI]

We consider a wide class of linear stochastic problems driven off the equilibrium by a multiplicative asymmetric force. The force brakes detailed balance, maintained otherwise, thus producing entropy. The large deviation function of the entropy production in the system is calculated explicitly. The general result is illustrated using an example of a polymer immersed in a gradient flow and subject to thermal fluctuations.

K. Turitsyn; M. Chertkov; V. Y. Chernyak; A. Puliafito

2007-02-20T23:59:59.000Z

342

Vehicle Identification Using Infrared Vision and Applications to Cooperative Perception  

E-Print Network [OSTI]

Vehicle Identification Using Infrared Vision and Applications to Cooperative Perception Axel von Arnim, Mathias Perrollaz, Arnaud Bertrand, Jacques Ehrlich Abstract-- Vehicles will be in the next on the road, or an emergency braking notification. Vehicles are also more and more equipped with perception

Paris-Sud XI, Universit de

343

N d'ordre : 69 -2011 Anne 2010/2011 THESE DE L`UNIVERSITE DE LYON  

E-Print Network [OSTI]

; __________________________________________________________________________________________ Title : Study of reliability and aging of supercapacitor storage system for partial and punctual. Summary: The first objective of the HYBUS project is to integrate a supercapacitor storage system an energy storage system, composed by a huge number of supercapacitors, for the recovery of the braking

Boyer, Edmond

344

Department of Mechanical Engineering Spring 2012 Motorized Rolling Walker  

E-Print Network [OSTI]

.16 ft.-lb. of torque Added a light-weight Li-Ion battery and a pulse-width-modulator controller battery capacity Tested the combined braking system to ensure they would stop the walker from moving with and without power Battery performed as desired, providing approximately 4 hours of use No yielding

Demirel, Melik C.

345

Cycling in the wet Wet weather (or at least the threat of rain) puts a  

E-Print Network [OSTI]

lubrication so you may need to check items such as chain and gears on a daily basis during a spell of bad weather. Make sure your brakes are in top condition, tyres well pumped and remember that it takes longer such as painted road markings and metal plates can provide very little friction in the rain and can be extremely

Bristol, University of

346

Volume 81, Issue 2 Friday, October 8, 1999 Look out, it's  

E-Print Network [OSTI]

was last Friday and it went extremely well. I would like to thank Kenny (my co-captain), all the Mathies and the parking brake is up. And it's 30 degrees Celsius. And you don't have air conditioning. Plus our streets, `honesty' is the keyword here. · Resumewritingshouldbefun.Trytoslipphraseslike "excessive lubricant

Zhu, Mu

347

Author's personal copy Research article  

E-Print Network [OSTI]

of heavy metals [23]. Glutathione reductase (GR) is the enzyme that, in conjunction with NADPH, catalyzes to heavy metal stresses have been the subject of several studies [9,21,31]. Srivas- tava et al. [27] found brake fern) accumulates large amounts of arsenic in its fronds without showing toxicity symptoms [19

Ma, Lena

348

JOURNAL DE PHYSIQUE IV Colloque C9, supplCment au Journal de Physique 111, Volume 3, dtcembre 1993  

E-Print Network [OSTI]

Corrosion during gasification of biomass and waste Rikard Kallstrom Studsvik Material AB, 61182 Nycoping oxychlorides, which easily brake the scale. During gasification of waste the situation is even worse, Sweden Abstract. - The gasificationof biomass and waste results in severe atmospheric corrosion con

Paris-Sud XI, Université de

349

Ris6 Report No. 143 Danish Atomic Energy Commission  

E-Print Network [OSTI]

the reference (inching mode); in addition the motors brake rapidly because of the permanent magnetization-speed motion. #12;. 2 . Table of Contents Pftge Introduction 3 General Description 3 Shaft Digitiser 3 Decoder the reflected decimal code from the shaft digitizer either to decimal form or to binary-coded decimal

350

Combustion joining of refractory materials: Carboncarbon composites  

E-Print Network [OSTI]

Combustion joining of refractory materials: Carbon­carbon composites Jeremiah D.E. White Department­carbon composite is achieved by employing self-sustained, oxygen-free, high-temperature combustion reactions to a used "core" to produce a brake that meets the performance specifications. The combustion-joining (CJ

Mukasyan, Alexander

351

Proprietary & Confidential Information NextEra Energy Resources  

E-Print Network [OSTI]

and Canada. #12;11 Generation Repair & Service 27 Employees $20 MM Investment $30 MM Inventory North American Parts & Services $2 MM Investment $17 MM Inventory NextEra Energy Resources Iowa Service angles Exterior casing and auxiliary equipment (brakes, oil pumps, instrumentation and case deflection

McCalley, James D.

352

16 IEEE Canadian Review -Spring / Printemps 2003 1.0 Introduction  

E-Print Network [OSTI]

less energy per kilometer than a standard car. In addition, as solar panel technology becomes more solar panels could be used to charge spare batteries during the workday. Table 1 gives a perspective, superior heat dissi- pation, increased power density and lower maintenance [5]. Regenerative braking refers

Ng, Wai Tung

353

National Aeronautics and Space Administration Entry, DEscEnt, anD LanDing  

E-Print Network [OSTI]

) TA09-6 1.1.1. Rigid Thermal Protection Systems (TPS) (cross cutting with TA05-Thermal Management) TA09-8 1.1.2. Flexible Thermal Protection Systems (cross cutting with TA05-Thermal Management) TA09-9 1 the atmosphere of a body for aerocapture or aero- braking (just "E"), landing on small or large bod- ies

Waliser, Duane E.

354

Manfred Huber 2011 1 Reasoning with Uncertainty  

E-Print Network [OSTI]

Logic - Applications Many everyday applications use Fuzzy Logic control Microwaves ABS brakes Camera Huber 2011 6 Fuzzy Inference (Control) Fuzzy Logic uses logic inference rules and defuzzification© Manfred Huber 2011 1 Reasoning with Uncertainty Fuzzy Logic #12;© Manfred Huber 2011 2 Fuzzy

Huber, Manfred

355

WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED,  

E-Print Network [OSTI]

WASTE DESCRIPTION TYPE OF PROJECT POUNDS REDUCED, REUSED, RECYCLED OR CONSERVED IN 2004 WASTE TYPE Brake Cleaner Recycling System Mercury Utility Devices Substitution 60 Hazardous Waste $1,750 $2,500 $1 of one PCB spill and clean-up event. Organic Solvents Substitution 678 Hazardous Waste $1,355 $36,500 $26

356

Efficient high density train operations  

DOE Patents [OSTI]

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as "Interference. During Acceleration", "Interference Near Station Stops", and "Interference During Delay Recovery." Managing such interference avoids unnecessary brake/acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake/acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking/accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Gordon, Susanna P. (Oakland, CA); Evans, John A. (Hayward, CA)

2001-01-01T23:59:59.000Z

357

Gille-ESYS 10 1 Should Alex Buy a Battery-Powered Car?  

E-Print Network [OSTI]

that use hydrogen fuel cells have a range of more than 200 miles, although they're outrageously expensive. ZEVs just aren't sufficiently environmental to justify their cost. For one thing, manufacturing a new their fuel efficiency is amazing. I was reading that they use regenerative braking to charge up

Gille, Sarah T.

358

ENSC 461: Four-Stroke Diesel Engine School of Engineering Science  

E-Print Network [OSTI]

and brake unit (HM 365), and internal combustion engine basic module (CT 159). Internal combustion engine basic module The internal combustion engine basic module forms the basis for investigations and experiments on internal combustion engines. This unit is equipped with mechanisms for measuring fuel and air

Bahrami, Majid

359

CV evolution: AM Her binaries and the period gap  

E-Print Network [OSTI]

AM Her variables -- synchronised magnetic cataclysmic variables (CVs) -- exhibit a different period distribution from other CVs across the period gap. We show that non-AM Her systems may infiltrate the longer-period end of the period gap if they are metal-deficient, but that the position and width of the gap in orbital period is otherwise insensitive to other binary parameters (excepting the normalisation of the braking rate). In AM Her binaries, magnetic braking is reduced as the wind from the secondary star may be trapped within the magnetosphere of the white dwarf primary. This reduced braking fills the period gap from its short-period end as the dipole magnetic moment of the white dwarf increases. The consistency of these models with the observed distribution of CVs, both AM Her and non-AM Her type, provides compelling evidence supporting magnetic braking as the agent of angular momentum loss among long-period CVs, and its disruption as the explanation of the 2 - 3 hour period gap among nonmagnetic CVs.

R. F. Webbink; D. T. Wickramasinghe

2002-04-19T23:59:59.000Z

360

Use of the WECC WAMS in Wide Area Probing Tests for Validation of System Performance & Modeling  

SciTech Connect (OSTI)

During 2005 and 2006 the Western Electricity Coordinating Council (WECC) performed three major tests of western system dynamics. These tests used a Wide Area Measurement System (WAMS) based primarily on Phasor Measurement Units (PMUs) to determine response to events including the insertion of the 1400-MW Chief Joseph braking resistor, probing signals, and ambient events. Test security was reinforced through real-time analysis of wide area effects, and high-quality data provided dynamic profiles for interarea modes across the entire western interconnection. The tests established that low-level optimized pseudo-random 20-MW probing with the Pacific DC Intertie (PDCI) roughly doubles the apparent noise that is natural to the power system, providing sharp dynamic information with negligible interference to system operations. Such probing is an effective alternative to use of the 1400-MW Chief Joseph dynamic brake, and it is under consideration as a standard means for assessing dynamic security.

Hauer, John F.; Mittelstadt, William; Martin, Kenneth E.; Burns, J. W.; Lee, Harry; Pierre, John W.; Trudnowski, Daniel

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Thermal transport properties of grey cast irons  

SciTech Connect (OSTI)

Thermal diffusivity and thermal conductivity of grey cast iron have been measured as a function of graphite flake morphology, chemical composition, and position in a finished brake rotor. Cast iron samples used for this investigation were cut from ``step block`` castings designed to produce iron with different graphite flake morphologies resulting from different cooling rates. Samples were also machined from prototype alloys and from production brake rotors representing a variation in foundry practice. Thermal diffusivity was measured at room and elevated temperatures via the flash technique. Heat capacity of selected samples was measured with differential scanning calorimetry, and these results were used to calculate the thermal conductivity. Microstructure of the various cast iron samples was quantified by standard metallography and image analysis, and the chemical compositions were determined by optical emission spectroscopy.

Hecht, R.L. [Ford Motor Co., Dearborn, MI (United States). Ford Research Lab.; Dinwiddie, R.B.; Porter, W.D.; Wang, Hsin [Oak Ridge National Lab., TN (United States)

1996-10-01T23:59:59.000Z

362

High reduction transaxle for electric vehicle  

DOE Patents [OSTI]

A drivetrain (12) includes a transaxle assembly (16) for driving ground engaging wheels of a land vehicle powered by an AC motor. The transaxle includes a ratio change section having planetary gear sets (24, 26) and brake assemblies (28, 30). Sun gears (60, 62) of the gear sets are directly and continuously connected to an input drive shaft (38) driven by the motor. A first drive (78a) directly and continuously connects a planetary gear carrier (78) of gear sets (24) with a ring gear (68) of gear set (26). A second drive (80a) directly and continuously connects a planetary gear carrier (80) of gear set (26) with a sun gear (64) of a final speed reduction gear set (34) having a planetary gear carrier directly and continuously connected to a differential (22). Brakes (28, 30) are selectively engageable to respectively ground a ring gear 66 of gear set 24 and ring gear 68 of gear set 26.

Kalns, Ilmars (Plymouth, MI)

1987-01-01T23:59:59.000Z

363

FYI: January 7, 1982 - June 24, 1982  

E-Print Network [OSTI]

with the operation of the Art Library where two Research Assistant positions are currently filled from shrinkage but which were, by previous agreement, to be permanent. Another was concerned with the possibility of filling or not filling a vacant position... the building is closed, because it involves shutting off all power, checking emergency lighting, sirens, buzzers, blinkers, horns, door-closers, brakes, ejection seats and parachutes. If you think of that as another normal day in the Circulation Department...

1982-01-01T23:59:59.000Z

364

Heavy Truck Engine Program  

SciTech Connect (OSTI)

The Heavy Duty Truck Engine Program at Cummins embodied three significant development phases. All phases of work strove to demonstrate a high level of diesel engine efficiency in the face of increasingly stringent emission requirements. Concurrently, aftertreatment system development and refinement was pursued in support of these efficiency demonstrations. The program's first phase focused on the demonstration in-vehicle of a high level of heavy duty diesel engine efficiency (45% Brake Thermal Efficiency) at a typical cruise condition while achieving composite emissions results which met the 2004 U.S. EPA legislated standards. With a combination of engine combustion calibration tuning and the development and application of Urea-based SCR and particulate aftertreatment, these demonstrations were successfully performed by Q4 of 2002. The second phase of the program directed efforts towards an in-vehicle demonstration of an engine system capable of meeting 2007 U.S. EPA legislated emissions requirements while achieving 45% Brake Thermal Efficiency at cruise conditions. Through further combustion optimization, the refinement of Cummins Cooled EGR architecture, the application of a high pressure common rail fuel system and the incorporation of optimized engine parasitics, Cummins Inc. successfully demonstrated these deliverables in Q2 of 2004. The program's final phase set a stretch goal of demonstrating 50% Brake Thermal Efficiency from a heavy duty diesel engine system capable of meeting 2010 U.S. EPA legislated emissions requirements. Cummins chose to pursue this goal through further combustion development and refinement of the Cooled EGR system architecture and also applied a Rankine cycle Waste Heat Recovery technique to convert otherwise wasted thermal energy to useful power. The engine and heat recovery system was demonstrated to achieve 50% Brake Thermal Efficiency while operating at a torque peak condition in second quarter, 2006. The 50% efficient engine system was capable of meeting 2010 emissions requirements through the application of NOx and particulate matter reduction techniques proven earlier in the program.

Nelson, Christopher

2009-01-08T23:59:59.000Z

365

Design and fabrication of advanced materials from Illinois coal wastes. Quarterly report, 1 March 1995--31 May 1995  

SciTech Connect (OSTI)

The main goal of this project is to develop a bench-scale procedure to design and fabricate advanced brake and structural composite materials from Illinois coal combustion residues. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), differential thermal analysis (DTA), and transmission-Fourier transform infrared (FTIR) were conducted on PCC fly ash (Baldwin), FBC fly ash (ADM unit1-6), FBC fly ash (S.I. coal), FBC spent bed ash (ADM unit1-6), bottom ash, and scrubber sludge (CWLP) residues to characterize their geometrical shapes, mineral phases, and thermal stability. Our spectroscopic results indicate that the scrubber sludge is mainly composed of a gypsum-like phase whose lattice structure is different from the lattice structure of conventional gypsum, and sludge does not contain hannebachite (CaSO{sub 3}0.5H{sub 2}O) phase. In the second and third quarters the focus of research has been on developing protocols for the formation of advanced brake composites and structural composites. Our attempts to fabricate brake frictional shoes, in the form of 1.25 inch disks, from PCC fly ash, FBC spent bed ash, scrubber sludge, coal char, iron particles, and coal tar were successful. Based on the experience gained and microscopic analyses, we have now upscaled our procedures to fabricate 2.5 inch diameter disks from coal combustion residues. The SEM and Young`s modulus analyses of brake composites fabricated at 400 psi < Pressure < 2200 psi suggest pressure has a strong influence on the particle packing and the filling of interstices in our composites.

Malhotra, V.M.; Wright, M.A.

1995-12-31T23:59:59.000Z

366

Berkeley Lab Accident Statistics Through January 31, 2012  

E-Print Network [OSTI]

1 Berkeley Lab Accident Statistics Through January 31, 2012 These slides are updated on a monthly Systems Engineer suffered the injuries from a single vehicle motorcycle accident. The employee had braked 0 0 0 0 0 0 0 1 Nuclear Science 0 0 0 0 0 0 0 0 0 0 0 0 0 Physics 0 0 0 0 0 0 0 0 0 0 0 0 0 Energy

Eisen, Michael

367

Friction of Materials for Automotive Applications  

SciTech Connect (OSTI)

This brief overview of friction-related issues in materials for automobiles is invited for a special issue on automotive materials in the ASM journal AM&P. It describes a range of areas in a ground vehicle in which friction must be controlled or minimized. Applications range from piston rings to tires, and from brakes to fuel injector components. A perspective on new materials and lubricants, and the need for validation testing is presented.

Blau, Peter Julian [ORNL

2013-01-01T23:59:59.000Z

368

A computer solution for estimating owning and operating costs for over-the-road hauling units  

E-Print Network [OSTI]

OF CONTENTS PAGE ABSTRACT ACKNOWLEDGEMENT S iv LIST OF TABLES LIST OF FIGURES vii ix CHAPTER I INTRODUCTION II OVER-THE-ROAD HAULING UNITS Characteristics Preliminary Purchase Investigation Vehicle Specifications Fuel Type Weight Restrictions... SIMULATION RUN III OUTPUT, SECOND SIMULATION RUN 88 101 113 VITA 125 yii LIST OF TABLES TABLE PAGE Major On-Highway Truck Manufacturers Gross Vehicle Weight (GVW) Components 10 12 3. (a) Fuel Costs Per Gallon 3. (b) Fuel Consumed Per Brake HP...

Wenners, Edward Bernard

1972-01-01T23:59:59.000Z

369

Design of regulated velocity flow assurance device for petroleum industry  

E-Print Network [OSTI]

flowmeter, which monitors the bypass flow. A motorized butterfly valve is used for actually controlling the bypass flow. In addition to cleaning, the proposed pig utilizes on-board electronics like accelerom- eter and pressure transducers to store the data... . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 B. Concept 1 : Governor Pig . . . . . . . . . . . . . . . . . . . . 35 vii CHAPTER Page C. Concept 2 : Pig Velocity Control Using Mechanical Braking . 39 D. Concept 3 : Bypass Control Using Motorized Butterfly Valve . 40 E. Conclusion...

Yardi, Chaitanya Narendra

2005-02-17T23:59:59.000Z

370

Reducing Fuel Consumption through Semi-Automated Platooning with Class 8 Tractor Trailer Combinations (Poster)  

SciTech Connect (OSTI)

This poster describes the National Renewable Energy Laboratory's evaluation of the fuel savings potential of semi-automated truck platooning. Platooning involves reducing aerodynamic drag by grouping vehicles together and decreasing the distance between them through the use of electronic coupling, which allows multiple vehicles to accelerate or brake simultaneously. The NREL study addressed the need for data on American style line-haul sleeper cabs with modern aerodynamics and over a range of trucking speeds common in the United States.

Lammert, M.; Gonder, J.

2014-07-01T23:59:59.000Z

371

Experimental and theoretical study of propeller spinner/shank interference  

E-Print Network [OSTI]

LIST OF TABLES Table 1. Spinner coordinates Page 82 Table 2. Clark Y airfoil coordinates 88 Xi NCNENCLATURE BHP Cd CD C Dt C speed of sound geometric shank length number of propeller blades Brake Horepower airfoil section chord wind... the more stringent noise regulations. These include concepts such as blade sweep, airfoils, proplets, increased number of blades, and counterr otation - accompanied by advanced materials and analytical capabilities. Another area which offers...

Cornell, Carl Clayton

1986-01-01T23:59:59.000Z

372

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett; Danforth, William; Bevington, Christopher; Jesse, Stowell; Costin, Daniel

2006-10-10T23:59:59.000Z

373

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett; Danforth, William; Bevington, Christopher; Stowell, Jesse; Costin, Daniel

2006-07-11T23:59:59.000Z

374

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett Lee; Danforth, William; Bevington, Christopher; Stowell, Jesse; Costin, Daniel

2006-09-19T23:59:59.000Z

375

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett; Danforth, William; Bevington, Christopher; Jesse, Stowell; Costin, Daniel

2007-02-27T23:59:59.000Z

376

Method for controlling a motor vehicle powertrain  

DOE Patents [OSTI]

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the position of the gear selector lever operated manually by the vehicle operator, the speed of the power source, the state of the ignition key, and the rate of release of an accelerator pedal. A control algorithm produces input data representing a commanded upshift, a commanded downshift and a torque command and various constant torque signals. A microprocessor processes the input and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake to produce the forward drive, reverse and regenerative operation of the transmission.

Burba, Joseph C. (Ypsilanti, MI); Landman, Ronald G. (Ypsilanti, MI); Patil, Prabhakar B. (Detroit, MI); Reitz, Graydon A. (Farmington Hills, MI)

1990-01-01T23:59:59.000Z

377

AB-Net Method of Protection from Projectiles (city, military base, battle-front, etc.)  

E-Print Network [OSTI]

The author suggests a low cost special AB-Net from artificial fiber, which may protect cities and important objects from rockets, artillery and mortar shells, projectiles, bullets, and strategic weapons. The idea is as follows: The offered AB-Net joins an incoming projectile to a small braking parachute and this incoming projectile loses speed by air braking after a drag distance of 50 - 150 meters. A following interception net after the first may serve to collect the slowed projectiles and their fragments or bomblets so that they do not reach the aimpoint. The author offers the design of AB-Net, a developed theory of snagging with a small braking parachute by AB-Net; and sample computations. These nets may be used for defense of a town, city, military base, battle-front line, road (from terrorists), or any important objects or installations (for example nuclear electric station, government buildings, etc.). Computed projects are: Net to counter small rockets (for example, from Qassam), net to counter artillery projectile (caliber 76 mm), net to counter bullets (caliber 7.6 mm). The offered method is cheaper by thousands of times than protection of a city by current anti-rocket systems. Discussion and results are at the end of the article. Key words: Protection from missile and projectile weapons, mortar, rocket, AB-Net, Qassam defense, incoming defense, armor.

Alexander Bolonkin

2008-02-13T23:59:59.000Z

378

Method for controlling a motor vehicle powertrain  

DOE Patents [OSTI]

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the position of the gear selector lever operated manually by the vehicle operator, the speed of the power source, the state of the ignition key, and the rate of release of an accelerator pedal. A control algorithm produces input data representing a commanded upshift, a commanded downshift and a torque command and various constant torque signals. A microprocessor processes the input and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake to produce the forward drive, reverse and regenerative operation of the transmission. 7 figs.

Burba, J.C.; Landman, R.G.; Patil, P.B.; Reitz, G.A.

1990-05-22T23:59:59.000Z

379

Design and fabrication of advanced materials from Illinois coal wastes. Quarterly report, 1 December 1994--28 February 1995  

SciTech Connect (OSTI)

The main goal of this project is to develop a bench-scale procedure to design and fabricate advanced brake and structural composite materials from Illinois coal combustion residues. During the first two quarters of the project, the thrust of the work directed towards characterizing the various coal combustion residues and FGD residue, i.e., scrubber sludge. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), differential thermal analysis (DTA), and transmission-Fourier transform infrared (FTIR) were conducted on PCC fly ash (Baldwin), FBC fly ash (ADK unit l-6), FBC fly ash (S.I. coal), FBC spent bed ash (ADM, unit l-6), bottom ash, and scrubber sludge (CWLP) residues to characterize their geometrical shapes, mineral phases, and thermal stability. Our spectroscopic results indicate that the scrubber sludge is mainly composed of a gypsum-like phase whose lattice structure is different from the lattice structure of conventional gypsum, and sludge does not contain hannebachite (CaSO{sub 3}.0.5H{sub 2}O) phase. Our attempts to fabricate brake frictional shoes, in the form of 1.25 inch disks, from PCC fly ash, FBC spent bed ash, scrubber sludge, coal char, iron particles, and coal tar were successful. Based on the experience gained and microscopic analyses, we have now upscaled our procedures to fabricate 2.5 inch diameter disk,- from coal combustion residues. This has been achieved. The SEM and Young`s modulus analyses of brake composites fabricated at 400 psi < Pressure < 2200 psi suggest pressure has a strong influence on the particle packing and the filling of interstices in our composites. Also, these results along with mechanical behavior of the fabricated disks lead us to believe that the combination of surface altered PCC fly ash and scrubber sludge particles, together ed ash particles are ideal for our composite materials.

Malhotra, V.M.; Wright, M.A. [Southern Illinois Univ., Carbondale, IL (United States)

1995-12-31T23:59:59.000Z

380

Cataclysmic Variable Primary Effective Temperatures: Constraints on Binary Angular Momentum Loss  

E-Print Network [OSTI]

We review the most decisive currently available measurements of the surface effective temperatures, Teff, of white dwarf (WD) primaries in cataclysmic variables (CVs) during accretion quiescence, and use these as a diagnostic for their time averaged accretion rate, . Using time-dependent calculations of the WD envelope, we investigate the sensitivity of the quiescent Teff to long term variations in the accretion rate. We find that the quiescent Teff provides one of the best available tests of predictions for the angular momentum loss and resultant mass transfer rates which govern the evolution of CVs. While gravitational radiation is sufficient to explain the of strongly magnetic CVs at all Porb, faster angular momentum loss is required by the temperatures of dwarf nova primaries (non-magnetic systems). This provides evidence that a normal stellar magnetic field structure near the secondary is essential for the enhanced braking mechanism to work, supporting the well-known stellar wind braking hypothesis. The contrast in is most prominent for orbital periods Porb > 3 hours, above the period gap, but a modest enhancement is also present at shorter Porb. The averaging time which reflects is as much as 10^5 years for low- systems and as little as 10^3 years for high- systems. We discuss the security of conclusions drawn about the CV population in light of these time scales and our necessarily incomplete sample of systems. Measurements for non-magnetic systems above the period gap fall below predictions from traditional stellar wind braking prescriptions, but above more recent predictions with somewhat weaker angular momentum loss. We also discuss the apparently high Teff's found in the VY Scl stars. (abridged)

Dean M. Townsley; Boris T. Gaensicke

2008-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

New coke-sorting system at OAO Koks  

SciTech Connect (OSTI)

A new coke-sorting system has been introduced at OAO Koks. It differs from the existing system in that it has no bunkers for all-purpose coke but only bunkers for commercial coke. In using this system with coke from battery 4, the crushing of the coke on conveyer belts, at roller screens, and in the commercial-coke bunkers is studied. After installing braking elements in the coke path, their effectiveness in reducing coke disintegration and improving coke screening is investigated. The granulometric composition and strength of the commercial coke from coke battery 3, with the new coke-sorting system, is evaluated.

B.Kh. Bulaevskii; V.S. Shved; Yu.V. Kalimin; S.D. Filippov [OAO Koks, Kemerovo (Russian Federation)

2009-05-15T23:59:59.000Z

382

High pressure testing of see-through labyrinth seals  

E-Print Network [OSTI]

of labyrinth tooth Impedance Inches of water [UT'] [L) [L) [FT/L] [FT/L] [FT/L] [FT/L] [L] [L] [F] [F] [UT ] [L] [F/L] [L] K;; m, N NT pe PR PS R Direct stiffness Cross-coupled stiffness Stiffness Coefficient Seal Length Stator... the exit-labyrinth seals. Section A-A in Figure 4 gives the location of swirl brakes. Btmor Inlet Annulus Back Pr'asnua Anfsrlur Shaker Btmgars (2 (9 90 ) Thmmomuple Pressure Traraduccfs (2 e sf ) et Prrmnlrf Btrg Pmmum Therm ocormles Transducers...

Picardo, Arthur Michael

2003-01-01T23:59:59.000Z

383

The Coughing Pulsar Magnetosphere  

E-Print Network [OSTI]

Polar magnetospheric gaps consume a fraction of the electric potential that develops accross open field lines. This effect modifies significantly the structure of the axisymmetric pulsar magnetosphere. We present numerical stead-state solutions for various values of the gap potential. We show that a charge starved magnetosphere contains significantly less electric current than one with freely available electric charges. As a result, electromagnetic neutron star braking becomes inefficient. We argue that the magnetosphere may spontaneously rearrange itself to a lower energy configuration through a dramatic release of electromagnetic field energy and magentic flux. Our results might be relevant in understanding the recent December 27, 2004 burst observed in SGR 1806-20.

Ioannis Contopoulos

2005-07-08T23:59:59.000Z

384

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with a starting and braking control system. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotary axis by keeping the blade span-wise direction in parallel with the axis and being provided with a low speed control windmill in which the radial position of each operating piece varies with a centrifugal force produced by the rotation of the vertical rotary axis.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

385

Regulated apparatus for the generation of electrical energy, such as a wind generator  

SciTech Connect (OSTI)

The invention relates to a regulated apparatus for the generation of electrical energy. A wind generator comprises a propeller having fixed blades and a generator connected by a transmission to the propeller and having sets of main and secondary brushes. The hub of the propeller comprises a rotor of an eddy-current brake whose inductor stator is supplied by a current delivered, starting from a certain speed , by the secondary brushes of the generator which are angularly shifted relative to their neutral position.

Kant, M.

1980-04-15T23:59:59.000Z

386

Mack LNG vehicle development  

SciTech Connect (OSTI)

The goal of this project was to install a production-ready, state-of-the-art engine control system on the Mack E7G natural gas engine to improve efficiency and lower exhaust emissions. In addition, the power rating was increased from 300 brake horsepower (bhp) to 325 bhp. The emissions targets were oxides of nitrogen plus nonmethane hydrocarbons of less than 2.5 g/bhp-hr and particulate matter of less than 0.05 g/bhp-hr on 99% methane. Vehicle durability and field testing were also conducted. Further development of this engine should include efficiency improvements and oxides of nitrogen reductions.

Southwest Research Institute

2000-01-05T23:59:59.000Z

387

Contribution of vehicle emissions to ambient carbonaceous particulate matter: A review and synthesis of the available data in the South Coast Air Basin. Final report  

SciTech Connect (OSTI)

Table of Contents: Executive Summary; Introduction; Ambient Carbonaceous Particulate Matter in the South Coast Air Basin; Measurements of Emissions from In-Use Motor Vehicles in the South Coast Air Basin; Integration of Emissions Measurements into Comprehensive Emissions Inventories; Relating Emissions fom Motor Vehicles to Particulate Air Quality; Synthesis: The Combined Effect of All Vehicle-Related Source Contributions Acting Together; Trends in More Recent Years; Opportunities for Further Research; References; Appendix A: Detailed Mass Emissions Rates for Organic Compounds from Motor Vehicle Exhaust; and Appendix B: Organic Compounds Emitted from Tire Dust, Paved Road Dust, and Brake Lining Wear Dust.

Cass, G.R.

1997-02-01T23:59:59.000Z

388

Recent Trends in Superstring Phenomenology  

E-Print Network [OSTI]

We review for non-experts possible phenomenological scenari in String Theory. In particular we focus on vacuum configurations with intersecting and/or magnetized unoriented D-branes. We will show how a TeV scale tension may be compatible with the existence of Large Extra Dimensions and how anomalous U(1)'s can give rise to interesting signatures at LHC or in cosmic rays. Finally, we discuss unoriented D-brane instantons as a source of non-perturbative effects that can contribute to moduli stabilization and susy braking in combination with fluxes. We conclude with an outlook and directions for future work.

Massimo Bianchi

2009-09-09T23:59:59.000Z

389

Prestressed elastomer for energy storage  

DOE Patents [OSTI]

Disclosed is a regenerative braking device for an automotive vehicle. The device includes a power isolating assembly (14), an infinitely variable transmission (20) interconnecting an input shaft (16) with an output shaft (18), and an energy storage assembly (22). The storage assembly includes a plurality of elastomeric rods (44, 46) mounted for rotation and connected in series between the input and output shafts. The elastomeric rods are prestressed along their rotational or longitudinal axes to inhibit buckling of the rods due to torsional stressing of the rods in response to relative rotation of the input and output shafts.

Hoppie, Lyle O. (Birmingham, MI); Speranza, Donald (Canton, MI)

1982-01-01T23:59:59.000Z

390

Double acting stirling engine phase control  

DOE Patents [OSTI]

A mechanical device for effecting a phase change between the expansion and compression volumes of a double-acting Stirling engine uses helical elements which produce opposite rotation of a pair of crankpins when a control rod is moved, so the phase between two pairs of pistons is changed by +.psi. and the phase between the other two pairs of pistons is changed by -.psi.. The phase can change beyond .psi.=90.degree. at which regenerative braking and then reversal of engine rotation occurs.

Berchowitz, David M. (Scotia, NY)

1983-01-01T23:59:59.000Z

391

Electromagnetic gearing applications in hybrid-electric vehicles  

E-Print Network [OSTI]

switched reluctance electromagnetic gear in mode 2b. . . . . 67 3. 12 Mode 2c. m, = 0, m, & 0, T, & 0. 68 LIST OF FIGURES (Continued) Figure Page 3. 13 Mode 2d. ca, = 0, c0, & 0, T, & 0. 69 3. 14 a). Phase A-A' is permanently energized. Rotor poles 1...-up of the transmotor hybrid. 127 5. 10 Engine runs at no load and the transmotor is de-energized. . . . 128 5. 11 Forward motion of the transmotor hybrid. 129 5. 12 Forward braking of the vehicle. 133 5. 13 Reverse direction motion of the vehicle. 135 5. 14...

Sodhi, Sameer

1994-01-01T23:59:59.000Z

392

Electric machine for hybrid motor vehicle  

DOE Patents [OSTI]

A power system for a motor vehicle having an internal combustion engine and an electric machine is disclosed. The electric machine has a stator, a permanent magnet rotor, an uncluttered rotor spaced from the permanent magnet rotor, and at least one secondary core assembly. The power system also has a gearing arrangement for coupling the internal combustion engine to wheels on the vehicle thereby providing a means for the electric machine to both power assist and brake in relation to the output of the internal combustion engine.

Hsu, John Sheungchun (Oak Ridge, TN)

2007-09-18T23:59:59.000Z

393

The Coughing Pulsar Magnetosphere  

E-Print Network [OSTI]

Polar magnetospheric gaps consume a fraction of the electric potential that develops accross open field lines. This effect modifies significantly the structure of the axisymmetric pulsar magnetosphere. We present numerical stead-state solutions for various values of the gap potential. We show that a charge starved magnetosphere contains significantly less electric current than one with freely available electric charges. As a result, electromagnetic neutron star braking becomes inefficient. We argue that the magnetosphere may spontaneously rearrange itself to a lower energy configuration through a dramatic release of electromagnetic field energy and magentic flux. Our results might be relevant in understanding the recent December 27, 2004 burst observed in SGR 1806-20.

Contopoulos, I

2005-01-01T23:59:59.000Z

394

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft.

Salyer, Ival O. (Dayton, OH)

1995-01-01T23:59:59.000Z

395

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft. 3 figs.

Salyer, I.O.

1995-12-26T23:59:59.000Z

396

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft. 3 figures.

Salyer, I.O.

1994-12-06T23:59:59.000Z

397

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft.

Salyer, Ival O. (Dayton, OH)

1994-01-01T23:59:59.000Z

398

FVB Energy Inc. Technical Assistance Project  

SciTech Connect (OSTI)

The request made by FVB asked for advice and analysis regarding the value of recapturing the braking energy of trains operating on electric light rail transit systems. A specific request was to evaluate the concept of generating hydrogen by electrolysis. The hydrogen would, in turn, power fuel cells that could supply electric energy back into the system for train propulsion or, possibly, also to the grid. To allow quantitative assessment of the potential resource, analysis focused on operations of the SoundTransit light rail system in Seattle, Washington. An initial finding was that the full cycle efficiency of producing hydrogen as the medium for capturing and reusing train braking energy was quite low (< 20%) and, therefore, not likely to be economically attractive. As flywheel energy storage is commercially available, the balance of the analysis focused the feasibility of using this alternative on the SoundTransit system. It was found that an investment in a flywheel with a 25-kWh capacity of the type manufactured by Beacon Power Corporation (BPC) would show a positive 20-year net present value (NPV) based on the current frequency of train service. The economic attractiveness of this option would increase initially if green energy subsidies or rebates were applicable and, in the future, as the planned frequency of train service grows.

DeSteese, John G.

2011-05-17T23:59:59.000Z

399

Effects of the Exposure to Corrosive Salts on the Frictional Behavior of Gray Cast Iron and a Titanium-Based Metal Matrix Composite  

SciTech Connect (OSTI)

The introduction of increasingly aggressive road-deicing chemicals has created significant and costly corrosion problems for the trucking industry. From a tribological perspective, corrosion of the sliding surfaces of brakes after exposure to road salts can create oxide scales on the surfaces that affect friction. This paper describes experiments on the effects of exposure to sodium chloride and magnesium chloride sprays on the transient frictional behavior of cast iron and a titanium-based composite sliding against a commercial brake lining material. Corrosion scales on cast iron initially act as abrasive third-bodies, then they become crushed, spread out, and behave as a solid lubricant. The composition and subsurface microstructures of the corrosion products on the cast iron were analyzed. Owing to its greater corrosion resistance, the titanium composite remained scale-free and its frictional response was markedly different. No corrosion scales were formed on the titanium composite after aggressive exposure to salts; however, a reduction in friction was still observed. Unlike the crystalline sodium chloride deposits that tended to remain dry, hygroscopic magnesium chloride deposits absorbed ambient moisture from the air, liquefied, and retained a persistent lubricating effect on the titanium surfaces.

Blau, Peter Julian [ORNL; Truhan, Jr., John J [ORNL; Kenik, Edward A [ORNL

2007-01-01T23:59:59.000Z

400

A Novel Integrated Magnetic Structure Based DC/DC Converter for Hybrid Battery/Ultracapacitor Energy Storage Systems  

SciTech Connect (OSTI)

This manuscript focuses on a novel actively controlled hybrid magnetic battery/ultracapacitor based energy storage system (ESS) for vehicular propulsion systems. A stand-alone battery system might not be sufficient to satisfy peak power demand and transient load variations in hybrid and plug-in hybrid electric vehicles (HEV, PHEV). Active battery/ultracapacitor hybrid ESS provides a better solution in terms of efficient power management and control flexibility. Moreover, the voltage of the battery pack can be selected to be different than that of the ultracapacitor, which will result in flexibility of design as well as cost and size reduction of the battery pack. In addition, the ultracapacitor bank can supply or recapture a large burst of power and it can be used with high C-rates. Hence, the battery is not subjected to supply peak and sharp power variations, and the stress on the battery will be reduced and the battery lifetime would be increased. Utilizing ultracapacitor results in effective capturing of the braking energy, especially in sudden braking conditions.

Onar, Omer C [ORNL

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Housing assembly for electric vehicle transaxle  

DOE Patents [OSTI]

Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

Kalns, Ilmars (Northville, MI)

1981-01-01T23:59:59.000Z

402

Two-speed transaxle  

DOE Patents [OSTI]

Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

Kalns, Ilmars (Northville, MI)

1981-01-01T23:59:59.000Z

403

Hydraulic system for a ratio change transmission  

DOE Patents [OSTI]

Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

Kalns, Ilmars (Northville, MI)

1981-01-01T23:59:59.000Z

404

Understanding white dwarf binary evolution with white dwarf/main sequence binaries: first results from SEGUE  

E-Print Network [OSTI]

Close white dwarf binaries make up a wide variety of objects such as double white dwarf binaries, which are possible SN Ia progenitors, cataclysmic variables, super soft sources, or AM CVn stars. The evolution and formation of close white dwarf binaries crucially depends on the rate at which angular momentum is extracted from the binary orbit. The two most important sources of angular momentum loss are the common envelope phase and magnetic braking. Both processes are so far poorly understood. Observational population studies of white dwarf/main sequence binaries provide the potential to significantly progress with this situation and to clearly constrain magnetic braking and the CE-phase. However, the current population of white dwarf/main sequence binaries is highly incomplete and heavily biased towards young systems containing hot white dwarfs. The SDSSII/SEGUE collaboration awarded us with 5 fibers per plate pair in order to fill this gap and to identify the required unbiased sample of old white dwarf/main sequence binaries. The success rate of our selection criteria exceeds 65% and during the first 10 months we have identified 41 new systems, most of them belonging to the missed old population.

M. R. Schreiber; A. Nebot Gomez-Moran; A. D. Schwope

2006-11-15T23:59:59.000Z

405

Conceptual study of the potential for automotive-derived and free-piston Stirling engines in 30- to 400-kilowatt stationary power applications. Final Report  

SciTech Connect (OSTI)

The technical feasibility of applying automotive-derived kinematic and free-piston Stirling engine concepts for stationary applications was explored. Automotive-derived engines offer cost advantages by providing a mature and developed engine technology base with downrating and parts commonality options for specific applications. Two engine sizes (30 and 400 kW), two Stirling engine configurations (kinematic and free-piston), and two output systems (crankshaft and hydraulic pump) were studied. The study includes the influences of using either hydrogen or helium as the working gas. The first kinematic configuration selects an existing Stirling engine design from an automotive application and adapts it to stationary requirements. A 50,000-hour life requirement was established by downrating the engine to 40 kW and reducing auxiliary loads. Efficiency improvements were gained by selective material and geometric variations and peak brake efficiency of 36.8 percent using helium gas was achieved. The second design was a four-cylinder, 400 kW engine, utilizing a new output drive system known as the z-crank, which provides lower friction losses and variable stroke power control. Three different material and working gas combinations were considered. Brake efficiency levels varied from 40.5 percent to 45.6 percent. A 37.5 kW single-cycle, free-piston hydraulic output design was generated by scaling one cylinder of the original automotive engine and mating it to a counterbalanced reciprocal hydraulic pump. Metallic diaphragms were utilized to transmit power.

Vatsky, A.; Chen, H.S.; Dineen, J.

1982-05-01T23:59:59.000Z

406

Pulsar wind model for the spin-down behavior of intermittent pulsars  

E-Print Network [OSTI]

It is observed that intermittent pulsars have higher slow down rate in the on state (radio-loud) than in the off state (radio-quiet). This gives the evidence that particle wind may play an important role in pulsar spindown. The effect of particle acceleration is included in modeling the rotational energy loss rate. Applying the pulsar wind model to the three intermittent pulsars (PSR B1931+24, PSR J1841-0500, and PSR J1832+0029), we calculate their magnetic field and inclination angle simultaneously. The braking index of intermittent pulsars is also predicted. The duty cycle of particle wind determined from timing observations is consistent with the duty cycle of the on state. It is shown that the particle number density may always be the Goldreich-Julian density. This may ensure that different on states of intermittent pulsars are stable. Observations on the inclination angle and braking index of intermittent pulsars may help to test different models of particle acceleration, as well as different models of p...

Li, L; Yan, W M; Yuan, J P; Xu, R X; Wang, N

2013-01-01T23:59:59.000Z

407

A Bidirectional High-Power-Quality Grid Interface With a Novel Bidirectional Noninverted Buck Boost Converter for PHEVs  

SciTech Connect (OSTI)

Plug-in hybrid electric vehicles (PHEVs) will play a vital role in future sustainable transportation systems due to their potential in terms of energy security, decreased environmental impact, improved fuel economy, and better performance. Moreover, new regulations have been established to improve the collective gas mileage, cut greenhouse gas emissions, and reduce dependence on foreign oil. This paper primarily focuses on two major thrust areas of PHEVs. First, it introduces a grid-friendly bidirectional alternating current/direct current ac/dc dc/ac rectifier/inverter for facilitating vehicle-to-grid (V2G) integration of PHEVs. Second, it presents an integrated bidirectional noninverted buck boost converter that interfaces the energy storage device of the PHEV to the dc link in both grid-connected and driving modes. The proposed bidirectional converter has minimal grid-level disruptions in terms of power factor and total harmonic distortion, with less switching noise. The integrated bidirectional dc/dc converter assists the grid interface converter to track the charge/discharge power of the PHEV battery. In addition, while driving, the dc/dc converter provides a regulated dc link voltage to the motor drive and captures the braking energy during regenerative braking.

Onar, Omer C [ORNL

2012-01-01T23:59:59.000Z

408

Reactivity Controlled Compression Ignition (RCCI) Combustion on a Multi-Cylinder Light-Duty Diesel Engine  

SciTech Connect (OSTI)

Reactivity controlled compression ignition is a low-temperature combustion technique that has been shown, both in computational fluid dynamics modeling and single-cylinder experiments, to obtain diesel-like efficiency or better with ultra-low nitrogen oxide and soot emissions, while operating primarily on gasoline-like fuels. This paper investigates reactivity controlled compression ignition operation on a four-cylinder light-duty diesel engine with production-viable hardware using conventional gasoline and diesel fuel. Experimental results are presented over a wide speed and load range using a systematic approach for achieving successful steady-state reactivity controlled compression ignition combustion. The results demonstrated diesel-like efficiency or better over the operating range explored with low engine-out nitrogen oxide and soot emissions. A peak brake thermal efficiency of 39.0% was demonstrated for 2600 r/min and 6.9 bar brake mean effective pressure with nitrogen oxide emissions reduced by an order of magnitude compared to conventional diesel combustion operation. Reactivity controlled compression ignition emissions and efficiency results are compared to conventional diesel combustion operation on the same engine.

Curran, Scott [ORNL; Hanson, Reed M [ORNL; Wagner, Robert M [ORNL

2012-01-01T23:59:59.000Z

409

Impact of high energy ball milling on the nanostructure of magnetitegraphite and magnetitegraphitemolybdenum disulphide blends  

SciTech Connect (OSTI)

Different, partly complementary and partly redundant characterization methods were applied to study the transition of magnetite, graphite and MoS{sub 2} powders to mechanically alloyed nanostructures. The applied methods were: Transmission electron microscopy (TEM), Mssbauer spectroscopy (MS), Raman spectroscopy (RS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The main objective was to prepare a model material providing the essential features of a typical tribofilm forming during automotive braking, and to assess the impact of different constituents on sliding behaviour and friction level. Irrespective of the initial grain size, the raw materials were transferred to a nanocrystalline structure and mixed on a nanoscopic scale during high energy ball milling. Whereas magnetite remained almost unchanged, graphite and molybdenum disulphide were transformed to a nanocrystalline and highly disordered structure. The observed increase of the coefficient of friction was attributed to a loss of lubricity of the latter ingredient due to this transformation and subsequent oxidation. - Highlights: Characterization of microstructural changes induced by high energy ball milling Assessment of the potential of different characterization methods Impact of mechanical alloying on tribological performance revealed by tests Preparation of an artificial third body resembling the one formed during braking.

sterle, W., E-mail: Werner.oesterle@bam.de [BAM Federal Institute for Materials Research and Testing, 12200 Berlin (Germany); Orts-Gil, G.; Gross, T.; Deutsch, C. [BAM Federal Institute for Materials Research and Testing, 12200 Berlin (Germany); Hinrichs, R. [Instituto de Geocincias, UFRGS, P.O. Box 15001, 91501-970 Porto Alegre (Brazil); Vasconcellos, M.A.Z. [Instituto de Fsica, UFRGS, P.O. Box 15051, 91501-970 Porto Alegre (Brazil); Zoz, H.; Yigit, D.; Sun, X. [Zoz Group, 57482 Wenden (Germany)

2013-12-15T23:59:59.000Z

410

Comparison of propane and methane performance and emissions in a turbocharged direct injection dual fuel engine  

SciTech Connect (OSTI)

With increasingly restrictive NO x and particulate matter emissions standards, the recent discovery of new natural gas reserves, and the possibility of producing propane efficiently from biomass sources, dual fueling strategies have become more attractive. This paper presents experimental results from dual fuel operation of a four-cylinder turbocharged direct injection (DI) diesel engine with propane or methane (a natural gas surrogate) as the primary fuel and diesel as the ignition source. Experiments were performed with the stock engine control unit at a constant speed of 1800 rpm, and a wide range of brake mean effective pressures (BMEPs) (2.7-11.6 bars) and percent energy substitutions (PESs) of C 3 H 8 and CH 4. Brake thermal efficiencies (BTEs) and emissions (NO x, smoke, total hydrocarbons (THCs), CO, and CO 2) were measured. Maximum PES levels of about 80-95% with CH 4 and 40-92% with C 3 H 8 were achieved. Maximum PES was limited by poor combustion efficiencies and engine misfire at low loads for both C 3 H 8 and CH 4, and the onset of knock above 9 bar BMEP for C 3 H 8. While dual fuel BTEs were lower than straight diesel BTEs at low loads, they approached diesel BTE values at high loads. For dual fuel operation, NO x and smoke reductions (from diesel values) were as high as 66-68% and 97%, respectively, but CO and THC emissions were significantly higher with increasing PES at all engine loads

Gibson, C. M.; Polk, A. C.; Shoemaker, N. T.; Srinivasan, K. K.; Krishnan, S. R.

2011-04-20T23:59:59.000Z

411

Wind turbine/generator set having a stator cooling system located between stator frame and active coils  

DOE Patents [OSTI]

A wind turbine comprising an electrical generator that includes a rotor assembly. A wind rotor that includes a wind rotor hub is directly coupled to the rotor assembly via a simplified connection. The wind rotor and generator rotor assembly are rotatably mounted on a central spindle via a bearing assembly. The wind rotor hub includes an opening having a diameter larger than the outside diameter of the central spindle adjacent the bearing assembly so as to allow access to the bearing assembly from a cavity inside the wind rotor hub. The spindle is attached to a turret supported by a tower. Each of the spindle, turret and tower has an interior cavity that permits personnel to traverse therethrough to the cavity of the wind rotor hub. The wind turbine further includes a frictional braking system for slowing, stopping or keeping stopped the rotation of the wind rotor and rotor assembly.

Bevington, Christopher M.; Bywaters, Garrett L.; Coleman, Clint C.; Costin, Daniel P.; Danforth, William L.; Lynch, Jonathan A.; Rolland, Robert H.

2012-11-13T23:59:59.000Z

412

Hydrogen engine performance analysis project. Second annual report  

SciTech Connect (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

413

Use of a new microporous insulation in a sub car at Acme Steel  

SciTech Connect (OSTI)

Acme Steel Co. is a small integrated steel company headquartered in Riverdale IL., with its blast furnace and coke plant operations located in the city of Chicago. Rail transportation between the two plants is by Conrail with two crews assigned exclusively to Acme. The torpedo cars used for this service are specially reinforced, with 36 in. wheels and additional braking capability for safety on public rail tracks. Over a seven month period, microporous insulating panels 0.28 in. thick in No. 49 sub ladle saved an average 24 degrees in the iron on arrival at the BOF compared to the average for the rest of the fleet. The microporous insulation replaced 0.25 in. of compressed fiber panel.

Harvey, H.; Gamble, F.C.; MacKenzie, I.B.

1996-12-31T23:59:59.000Z

414

Baseline and verification tests of the electric vehicle associates' current fare station wagon. Final test report, March 27, 1980-November 6, 1981  

SciTech Connect (OSTI)

The EVA Current Fare Wagon was manufactured by Electric Vehicle Associates, Incorporated (EVA) of Cleveland, Ohio. It is now available from Lectra Motors Corp. of Las Vegas, Nevada. The vehicle was tested under the direction of MERADCOM from 27 March 1980 to 6 November 1981. The tests are part of a Department of Energy project to assess advances in electric vehicle design. This report presents the performance test results on the EVA Current Fare Wagon. The EVA Current Fare Wagon is a 1980 Ford Fairmont station wagon which has been converted to an electric vehicle. The propulsion system is made up of a Cableform controller, a series-wound 30-hp Reliance Electric Motor, and 22 6-V lead-acid batteries. The Current Fare Wagon is also equipped with regenerative braking. Further details of the vehicle are given in the Vehicle Summary Data Sheet, Appendix A. The results of this testing are given in Table 1.

Dowgiallo, E.J. Jr.; Chapman, R.D.

1983-01-01T23:59:59.000Z

415

Control system for a hybrid powertrain system  

DOE Patents [OSTI]

A vehicle includes a powertrain with an engine, first and second torque machines, and a hybrid transmission. A method for operating the vehicle includes operating the engine in an unfueled state, releasing an off-going clutch which when engaged effects operation of the hybrid transmission in a first continuously variable mode, and applying a friction braking torque to a wheel of the vehicle to compensate for an increase in an output torque of the hybrid transmission resulting from releasing the off-going clutch. Subsequent to releasing the off-going clutch, an oncoming clutch which when engaged effects operation of the hybrid transmission in a second continuously variable mode is synchronized. Subsequent to synchronization of the oncoming clutch, the oncoming clutch is engaged.

Naqvi, Ali K.; Demirovic, Besim; Gupta, Pinaki; Kaminsky, Lawrence A.

2014-09-09T23:59:59.000Z

416

The Crab glitches: incidence and cumulative effect  

E-Print Network [OSTI]

The fourteen glitches observed during 33 years do not show the simple pattern expected from a relaxation oscillator. They may however be regarded as three major events separated by about 12 years, the third being a group of smaller glitches. There is a step increase in slowdown rate at each glitch, whose cumulative effect makes a significant contribution to the second differential nu-ddot. The braking index "n" has previously been evaluated only between glitches: the effect of the glitches is to reduce "n" from 2.51 to 2.45. This extra effect due to the glitches would be explained by an increase in dipole field at the fractional rate of 1.5x10^-5 per annum.

F. Graham Smith; C. Jordan

2003-01-10T23:59:59.000Z

417

Power Modulation Investigation for High Temperature (175-200 degrees Celcius) Automotive Application  

SciTech Connect (OSTI)

Hybrid electric vehicles were re-introduced in the late 1990s after a century dominated by purely internal combustion powered engines[1]. Automotive players, such as GM, Ford, DaimlerChrysler, Honda, and Toyota, together with major energy producers, such as BPAmoco, were the major force in the development of hybrid electric vehicles. Most notable was the development by Toyota of its Prius, which was launched in Japan in 1997 and worldwide in 2001. The shift to hybrids was driven by the fact that the sheer volume of vehicles on the road had begun to tax the ability of the environment to withstand the pollution of the internal combustion engine and the ability of the fossil fuel industry to produce a sufficient amount of refined gasoline. In addition, the number of vehicles was anticipated to rise exponentially with the increasing affluence of China and India. Over the last fifteen years, major advances have been made in all the technologies essential to hybrid vehicle success, including batteries, motors, power control and conditioning electronics, regenerative braking, and power sources, including fuel cells. Current hybrid electric vehicles are gasoline internal combustion--electric motor hybrids. These hybrid electric vehicles range from micro-hybrids, where a stop/start system cuts the engine while the vehicle is stopped, and mild hybrids where the stop/start system is supplemented by regenerative braking and power assist, to full hybrids where the combustion motor is optimized for electric power production, and there is full electric drive and full regenerative braking. PSA Peugeot Citroen estimates the increased energy efficiency will range from 3-6% for the micro-hybrids to 15-25% for the full hybrids.[2] Gasoline-electric hybrids are preferred in US because they permit long distance travel with low emissions and high gasoline mileage, while still using the existing refueling infrastructure. One of the most critical areas in which technology has been advancing has been the development of electronics that can operate in the high temperature environments present in hybrid vehicles. The temperatures under the hood for a gasoline-electric hybrid vehicle are comparable to those for traditional internal combustion engines. This is known to be a difficult environment with respect to commercial-grade electronics, as there are surface and ambient temperatures ranging from 125 C to 175 C. In addition, some hybrid drive electronics are placed in even harsher environments, such as on or near the brakes, where temperatures can reach 250 C. Furthermore, number of temperature cycles experienced by electronics in a hybrid vehicle is different from that experienced in a traditional vehicle. A traditional internal combustion vehicle will have the engine running for longer periods, whereas a mild or micro-hybrid engine will experience many more starts and stops.[3] This means that hybrid automotive electronics will undergo more cycles of a potential wider temperature cycle than standard automotive electronics, which in turn see temperature cycles of 2 to 3 times the magnitude of the {Delta}T = 50 C-75 C experienced by commercial-grade electronics. This study will discuss the effects of these harsh environments on the failure mechanisms and ultimate reliability of electronic systems developed for gasoline-electric hybrid vehicles. In addition, it will suggest technologies and components that can reasonably be expected to perform well in these environments. Finally, it will suggest areas where further research is needed or desirable. Areas for further research will be highlighted in bold, italic type. It should be noted that the first area where further research is desirable is in developing a clearer understanding of the actual hybrid automotive electronics environment and how to simulate it through accelerated testing, thus: Developing specific mission profiles and accelerated testing protocols for the underhood environment for hybrid cars, as has previously been done for gasoline-powered vehicles, is an important area for further st

McCluskey, F. P.

2007-04-30T23:59:59.000Z

418

(Construction of a wind turbine). Final report  

SciTech Connect (OSTI)

A wind powered electrical generator was built by industrial arts students working in electricity, woodworking, and metal technology facilities. The blades were originally aluminum frames covered with sailcloth. These were replaced with hand-carved laminated basswood blades. Original plans called for a bullet and downwind propeller, but this was replaced with an upwind propeller and an aft-mounted tailfin. A V-belt and pulley drive transmits power from the turbine and a motorcycle brake stops the machine during high winds and/or for safe servicing. The original 13 volt, 105 amp alternator was replaced by a 12 volt, 100 amp dc generator. Publicity and dissemination events are listed as well as expenditures. (LEW)

Devine, L.E.

1982-03-22T23:59:59.000Z

419

Wind turbine spoiler  

DOE Patents [OSTI]

An aerodynamic spoiler system for a vertical axis wind turbine includes spoilers on the blades initially stored near the rotor axis to minimize drag. A solenoid latch adjacent the central support tower releases the spoilers and centrifugal force causes the spoilers to move up the turbine blades away from the rotor axis, thereby producing a braking effect and actual slowing of the associated wind turbine, if desired. The spoiler system can also be used as an infinitely variable power control by regulated movement of the spoilers on the blades over the range between the undeployed and fully deployed positions. This is done by the use of a suitable powered reel and cable located at the rotor tower to move the spoilers.

Sullivan, William N. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

420

Wind turbine rotor hub and teeter joint  

DOE Patents [OSTI]

A rotor hub is provided for coupling a wind turbine rotor blade and a shaft. The hub has a yoke with a body which is connected to the shaft, and extension portions which are connected to teeter bearing blocks, each of which has an aperture. The blocks are connected to a saddle which envelops the rotor blade by one or two shafts which pass through the apertures in the bearing blocks. The saddle and blade are separated by a rubber interface which provides for distribution of stress over a larger portion of the blade. Two teeter control mechanisms, which may include hydraulic pistons and springs, are connected to the rotor blade and to the yoke at extension portions. These control mechanisms provide end-of-stroke damping, braking, and stiffness based on the teeter angle and speed of the blade.

Coleman, Clint (Warren, VT); Kurth, William T. (Warren, VT); Jankowski, Joseph (Stowe, VT)

1994-10-11T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Wind turbine having a direct-drive drivetrain  

DOE Patents [OSTI]

A wind turbine comprising an electrical generator that includes a rotor assembly. A wind rotor that includes a wind rotor hub is directly coupled to the rotor assembly via a simplified connection. The wind rotor and generator rotor assembly are rotatably mounted on a central spindle via a bearing assembly. The wind rotor hub includes an opening having a diameter larger than the outside diameter of the central spindle adjacent the bearing assembly so as to allow access to the bearing assembly from a cavity inside the wind rotor hub. The spindle is attached to a turret supported by a tower. Each of the spindle, turret and tower has an interior cavity that permits personnel to traverse therethrough to the cavity of the wind rotor hub. The wind turbine further includes a frictional braking system for slowing, stopping or keeping stopped the rotation of the wind rotor and rotor assembly.

Bevington, Christopher M.; Bywaters, Garrett L.; Coleman, Clint C.; Costin, Daniel P.; Danforth, William L.; Lynch, Jonathan A.; Rolland, Robert H.

2011-02-22T23:59:59.000Z

422

Primary Cosmic Ray Proton Flux Measured by AMS-02  

E-Print Network [OSTI]

The Alpha Magnetic Spectrometer (AMS-02) is a high energy particle detector designed to study origin and nature of cosmic rays up to a few TV from space. It was installed on the International Space Station (ISS) on May 19, 2011. During the first two years of operation AMS-02 performed precise measurements of the proton flux. In the low rigidity range, from 1 GV to 20 GV, the proton flux was daily measured with a statistical error less than 1%. In the same rigidity range a gradual decrease due to Solar modulation effect and transit variations due to Solar Flares and Coronal Mass Ejection were also observed. In the rigidity range from 20 GV up to 100 GV instead, AMS-02 data show no drastic variation and the results are consistent with other experiments. Above 100 GV, AMS-02 proton flux exhibits a single power low behavior with no fine structures nor brakes.

C. Consolandi; on Behalf of the AMS-02 Collaboration

2014-02-06T23:59:59.000Z

423

Diesol: an alternative fuel for compression ignition engines  

SciTech Connect (OSTI)

Physical properties including specific gravity, kinematic viscosity, heat of combustion, flash point, cetane number and distillation curves are presented for several blends of No. 2 diesel fuel and soybean oil. The mixture is referred to as Diesol. The soybean oil received a minimal amount of refining by water-washing to remove most of the lecithin type gums. The Diesol fuels were tested in a Cooperative Fuel Research single cylinder diesel test engine to determine the short time engine performance using soybean oil as a diesel fuel extender. Brake specific fuel consumption, volumetric fuel consumption, exhaust smoke opacity and power were determined. Various blends of Diesol were also tested in a multicylinder diesel commercial power system. Results are presented to show the comparison between Diesol blends and diesel fuel. The fuel properties and engine performance test results indicate that soybean oil would be a viable extender of diesel fuel for compression-ignition engines.

Cochran, B.J.; Baldwin, J.D.C.; Daniel, L.R. Jr.

1981-01-01T23:59:59.000Z

424

Utilization of rotor kinetic energy storage for hybrid vehicles  

DOE Patents [OSTI]

A power system for a motor vehicle having an internal combustion engine, the power system comprises an electric machine (12) further comprising a first excitation source (47), a permanent magnet rotor (28) and a magnetic coupling rotor (26) spaced from the permanent magnet rotor and at least one second excitation source (43), the magnetic coupling rotor (26) also including a flywheel having an inertial mass to store kinetic energy during an initial acceleration to an operating speed; and wherein the first excitation source is electrically connected to the second excitation source for power cycling such that the flywheel rotor (26) exerts torque on the permanent magnet rotor (28) to assist braking and acceleration of the permanent magnet rotor (28) and consequently, the vehicle. An axial gap machine and a radial gap machine are disclosed and methods of the invention are also disclosed.

Hsu, John S. (Oak Ridge, TN)

2011-05-03T23:59:59.000Z

425

Beating the spin-down limit on gravitational wave emission from the Crab pulsar  

E-Print Network [OSTI]

We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravitational-wave Observatory (LIGO). These limits are based on two searches. In the first we assume that the gravitational wave emission follows the observed radio timing, giving an upper limit on gravitational wave emission that beats indirect limits inferred from the spin-down and braking index of the pulsar and the energetics of the nebula. In the second we allow for a small mismatch between the gravitational and radio signal frequencies and interpret our results in the context of two possible gravitational wave emission mechanisms.

The LIGO Scientific Collaboration; B. Abbott; R. Abbott; R. Adhikari; P. Ajith; B. Allen; G. Allen; R. Amin; S. B. Anderson; W. G. Anderson; M. A. Arain; M. Araya; H. Armandula; P. Armor; Y. Aso; S. Aston; P. Aufmuth; C. Aulbert; S. Babak; S. Ballmer; H. Bantilan; B. C. Barish; C. Barker; D. Barker; B. Barr; P. Barriga; M. A. Barton; M. Bastarrika; K. Bayer; J. Betzwieser; P. T. Beyersdorf; I. A. Bilenko; G. Billingsley; R. Biswas; E. Black; K. Blackburn; L. Blackburn; D. Blair; B. Bland; T. P. Bodiya; L. Bogue; R. Bork; V. Boschi; S. Bose; P. R. Brady; V. B. Braginsky; J. E. Brau; M. Brinkmann; A. Brooks; D. A. Brown; G. Brunet; A. Bullington; A. Buonanno; O. Burmeister; R. L. Byer; L. Cadonati; G. Cagnoli; J. B. Camp; J. Cannizzo; K. Cannon; J. Cao; L. Cardenas; T. Casebolt; G. Castaldi; C. Cepeda; E. Chalkley; P. Charlton; S. Chatterji; S. Chelkowski; Y. Chen; N. Christensen; D. Clark; J. Clark; T. Cokelaer; R. Conte; D. Cook; T. Corbitt; D. Coyne; J. D. E. Creighton; A. Cumming; L. Cunningham; R. M. Cutler; J. Dalrymple; K. Danzmann; G. Davies; D. DeBra; J. Degallaix; M. Degree; V. Dergachev; S. Desai; R. DeSalvo; S. Dhurandhar; M. Daz; J. Dickson; A. Dietz; F. Donovan; K. L. Dooley; E. E. Doomes; R. W. P. Drever; I. Duke; J. -C. Dumas; R. J. Dupuis; J. G. Dwyer; C. Echols; A. Effler; P. Ehrens; E. Espinoza; T. Etzel; T. Evans; S. Fairhurst; Y. Fan; D. Fazi; H. Fehrmann; M. M. Fejer; L. S. Finn; K. Flasch; N. Fotopoulos; A. Freise; R. Frey; T. Fricke; P. Fritschel; V. V. Frolov; M. Fyffe; J. Garofoli; I. Gholami; J. A. Giaime; S. Giampanis; K. D. Giardina; K. Goda; E. Goetz; L. Goggin; G. Gonzlez; S. Gossler; R. Gouaty; A. Grant; S. Gras; C. Gray; M. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; F. Grimaldi; R. Grosso; H. Grote; S. Grunewald; M. Guenther; E. K. Gustafson; R. Gustafson; B. Hage; J. M. Hallam; D. Hammer; C. Hanna; J. Hanson; J. Harms; G. Harry; E. Harstad; K. Hayama; T. Hayler; J. Heefner; I. S. Heng; M. Hennessy; A. Heptonstall; M. Hewitson; S. Hild; E. Hirose; D. Hoak; D. Hosken; J. Hough; S. H. Huttner; D. Ingram; M. Ito; A. Ivanov; B. Johnson; W. W. Johnson; D. I. Jones; G. Jones; R. Jones; L. Ju; P. Kalmus; V. Kalogera; S. Kamat; J. Kanner; D. Kasprzyk; E. Katsavounidis; K. Kawabe; S. Kawamura; F. Kawazoe; W. Kells; D. G. Keppel; F. Ya. Khalili; R. Khan; E. Khazanov; C. Kim; P. King; J. S. Kissel; S. Klimenko; K. Kokeyama; V. Kondrashov; R. K. Kopparapu; D. Kozak; I. Kozhevatov; B. Krishnan; P. Kwee; P. K. Lam; M. Landry; M. M. Lang; B. Lantz; A. Lazzarini; M. Lei; N. Leindecker; V. Leonhardt; I. Leonor; K. Libbrecht; H. Lin; P. Lindquist; N. A. Lockerbie; D. Lodhia; M. Lormand; P. Lu; M. Lubinski; A. Lucianetti; H. Lck; B. Machenschalk; M. MacInnis; M. Mageswaran; K. Mailand; V. Mandic; S. Mrka; Z. Mrka; A. Markosyan; J. Markowitz; E. Maros; I. Martin; R. M. Martin; J. N. Marx; K. Mason; F. Matichard; L. Matone; R. Matzner; N. Mavalvala; R. McCarthy; D. E. McClelland; S. C. McGuire; M. McHugh; G. McIntyre; G. McIvor; D. McKechan; K. McKenzie; T. Meier; A. Melissinos; G. Mendell; R. A. Mercer; S. Meshkov; C. J. Messenger; D. Meyers; J. Miller; J. Minelli; S. Mitra; V. P. Mitrofanov; G. Mitselmakher; R. Mittleman; O. Miyakawa; B. Moe; S. Mohanty; G. Moreno; K. Mossavi; C. MowLowry; G. Mueller; S. Mukherjee; H. Mukhopadhyay; H. Mller-Ebhardt; J. Munch; P. Murray; E. Myers; J. Myers; T. Nash; J. Nelson; G. Newton; A. Nishizawa; K. Numata; J. O'Dell; G. Ogin; B. O'Reilly; R. O'Shaughnessy; D. J. Ottaway; R. S. Ottens; H. Overmier; B. J. Owen; Y. Pan; C. Pankow; M. A. Papa; V. Parameshwaraiah; P. Patel; M. Pedraza; S. Penn; A. Perreca; T. Petrie; I. M. Pinto; M. Pitkin; H. J. Pletsch; M. V. Plissi; F. Postiglione; M. Principe; R. Prix; V. Quetschke; F. Raab; D. S. Rabeling; H. Radkins; N. Rainer; M. Rakhmanov; M. Ramsunder; H. Rehbein; S. Reid; D. H. Reitze; R. Riesen; K. Riles; B. Rivera; N. A. Robertson; C. Robinson; E. L. Robinson; S. Roddy; A. Rodriguez; A. M. Rogan; J. Rollins; J. D. Romano; J. Romie; R. Route; S. Rowan; A. Rdiger; L. Ruet; P. Russell; K. Ryan; S. Sakata; M. Samidi; L. Sancho de la Jordana; V. Sandberg; V. Sannibale; S. Saraf; P. Sarin; B. S. Sathyaprakash; S. Sato; P. R. Saulson; R. Savage; P. Savov; S. W. Schediwy; R. Schilling; R. Schnabel; R. Schofield; B. F. Schutz; P. Schwinberg; S. M. Scott; A. C. Searle; B. Sears; F. Seifert; D. Sellers; A. S. Sengupta; P. Shawhan; D. H. Shoemaker; A. Sibley; X. Siemens; D. Sigg; S. Sinha; A. M. Sintes; B. J. J. Slagmolen; J. Slutsky; J. R. Smith; M. R. Smith; N. D. Smith; K. Somiya; B. Sorazu; L. C. Stein; A. Stochino; R. Stone; K. A. Strain; D. M. Strom; A. Stuver; T. Z. Summerscales; K. -X. Sun; M. Sung; P. J. Sutton; H. Takahashi; D. B. Tanner; R. Taylor; R. Taylor; J. Thacker; K. A. Thorne; K. S. Thorne; A. Thring; K. V. Tokmakov; C. Torres; C. Torrie; G. Traylor; M. Trias; W. Tyler

2008-07-22T23:59:59.000Z

426

Heavy-Duty Stoichiometric Compression Ignition Engine with Improved Fuel Economy over Alternative Technologies for Meeting 2010 On-Highway Emission  

SciTech Connect (OSTI)

The objectives of the reported work were: to apply the stoichiometric compression ignition (SCI) concept to a 9.0 liter diesel engine; to obtain engine-out NO{sub x} and PM exhaust emissions so that the engine can meet 2010 on-highway emission standards by applying a three-way catalyst for NO{sub x} control and a particulate filter for PM control; and to simulate an optimize the engine and air system to approach 50% thermal efficiency using variable valve actuation and electric turbo compounding. The work demonstrated that an advanced diesel engine can be operated at stoichiometric conditions with reasonable particulate and NOx emissions at full power and peak torque conditions; calculated that the SCI engine will operate at 42% brake thermal efficiency without advanced hardware, turbocompounding, or waste heat recovery; and determined that EGR is not necessary for this advanced concept engine, and this greatly simplifies the concept.

Kirby J. Baumgard; Richard E. Winsor

2009-12-31T23:59:59.000Z

427

Submerged electricity generation plane with marine current-driven motors  

DOE Patents [OSTI]

An underwater apparatus for generating electric power from ocean currents and deep water tides. A submersible platform including two or more power pods, each having a rotor with fixed-pitch blades, with drivetrains housed in pressure vessels that are connected by a transverse structure providing buoyancy, which can be a wing depressor, hydrofoil, truss, or faired tube. The platform is connected to anchors on the seafloor by forward mooring lines and a vertical mooring line that restricts the depth of the device in the water column. The platform operates using passive, rather than active, depth control. The wing depressor, along with rotor drag loads, ensures the platform seeks the desired operational current velocity. The rotors are directly coupled to a hydraulic pump that drives at least one constant-speed hydraulic-motor generator set and enables hydraulic braking. A fluidic bearing decouples non-torque rotor loads to the main shaft driving the hydraulic pumps.

Dehlsen, James G.P.; Dehlsen, James B.; Fleming, Alexander

2014-07-01T23:59:59.000Z

428

Bailer for top head drive rotary well drills  

SciTech Connect (OSTI)

A bailer mounted to the derrick of a top head drive well drilling rig is described. The bailer includes a winch line drum mounted by a bracket to the derrick. A positive displacement hydraulic motor mounts one end of the drum and receives fluid under pressure from the existing hydraulic pressure supply. Valving is provided to allow reverse operation of the motor so equipment can either be raised or lowered relative to the derrick. The hydraulic delivery line to the motor includes a one way restrictor that will allow relatively free passage of fluid to the motor in a driving or lifting mode but will reverse flow of fluid from the motor, thereby affording a braking effect for lowering a load at a selected rate.

Bartholomew, L.

1980-09-23T23:59:59.000Z

429

Collapse of magnetized hypermassive neutron stars in general relativity  

E-Print Network [OSTI]

Hypermassive neutron stars (HMNSs) -- equilibrium configurations supported against collapse by rapid differential rotation -- are possible transient remnants of binary neutron star mergers. Using newly developed codes for magnetohydrodynamic simulations in dynamical spacetimes, we are able to track the evolution of a magnetized HMNS in full general relativity for the first time. We find that secular angular momentum transport due to magnetic braking and the magnetorotational instability results in the collapse of an HMNS to a rotating black hole, accompanied by a gravitational wave burst. The nascent black hole is surrounded by a hot, massive torus undergoing quasistationary accretion and a collimated magnetic field. This scenario suggests that HMNS collapse is a possible candidate for the central engine of short gamma-ray bursts.

Matthew D. Duez; Yuk Tung Liu; Stuart L. Shapiro; Masaru Shibata; Branson C. Stephens

2005-12-09T23:59:59.000Z

430

Magnetized Hypermassive Neutron Star Collapse: a candidate central engine for short-hard GRBs  

E-Print Network [OSTI]

Hypermassive neutron stars (HMNSs) are equilibrium configurations supported against collapse by rapid differential rotation and likely form as transient remnants of binary neutron star mergers. Though HMNSs are dynamically stable, secular effects such as viscosity or magnetic fields tend to bring HMNSs into uniform rotation and thus lead to collapse. We simulate the evolution of magnetized HMNSs in axisymmetry using codes which solve the Einstein-Maxwell-MHD system of equations. We find that magnetic braking and the magnetorotational instability (MRI) both contribute to the eventual collapse of HMNSs to rotating black holes surrounded by massive, hot accretion tori and collimated magnetic fields. Such hot tori radiate strongly in neutrinos, and the resulting neutrino-antineutrino annihilation could power short-hard GRBs.

Branson C. Stephens; Matthew D. Duez; Yuk Tung Liu; Stuart L. Shapiro; Masaru Shibta

2007-02-02T23:59:59.000Z

431

Advanced Hybrid Propulsion and Energy Management System for High Efficiency, Off Highway, 240 Ton Class, Diesel Electric Haul Trucks  

SciTech Connect (OSTI)

The objective of this project is to reduce the fuel consumption of off-highway vehicles, specifically large tonnage mine haul trucks. A hybrid energy storage and management system will be added to a conventional diesel-electric truck that will allow capture of braking energy normally dissipated in grid resistors as heat. The captured energy will be used during acceleration and motoring, reducing the diesel engine load, thus conserving fuel. The project will work towards a system validation of the hybrid system by first selecting an energy storage subsystem and energy management subsystem. Laboratory testing at a subscale level will evaluate these selections and then a full-scale laboratory test will be performed. After the subsystems have been proven at the full-scale lab, equipment will be mounted on a mine haul truck and integrated with the vehicle systems. The integrated hybrid components will be exercised to show functionality, capability, and fuel economy impacts in a mine setting.

Richter, Tim; Slezak, Lee; Johnson, Chris; Young, Henry; Funcannon, Dan

2008-12-31T23:59:59.000Z

432

Method and apparatus for controlling battery charging in a hybrid electric vehicle  

DOE Patents [OSTI]

A starter/alternator system (24) for hybrid electric vehicle (10) having an internal combustion engine (12) and an energy storage device (34) has a controller (30) coupled to the starter/alternator (26). The controller (30) has a state of charge manager (40) that monitors the state of charge of the energy storage device. The controller has eight battery state-of-charge threshold values that determine the hybrid operating mode of the hybrid electric vehicle. The value of the battery state-of-charge relative to the threshold values is a factor in the determination of the hybrid mode, for example; regenerative braking, charging, battery bleed, boost. The starter/alternator may be operated as a generator or a motor, depending upon the mode.

Phillips, Anthony Mark (Northville, MI); Blankenship, John Richard (Dearborn, MI); Bailey, Kathleen Ellen (Dearborn, MI); Jankovic, Miroslava (Birmingham, MI)

2003-06-24T23:59:59.000Z

433

Low cost electronic ultracapacitor interface technique to provide load leveling of a battery for pulsed load or motor traction drive applications  

DOE Patents [OSTI]

A battery load leveling arrangement for an electrically powered system in which battery loading is subject to intermittent high current loading utilizes a passive energy storage device and a diode connected in series with the storage device to conduct current from the storage device to the load when current demand forces a drop in battery voltage. A current limiting circuit is connected in parallel with the diode for recharging the passive energy storage device. The current limiting circuit functions to limit the average magnitude of recharge current supplied to the storage device. Various forms of current limiting circuits are disclosed, including a PTC resistor coupled in parallel with a fixed resistor. The current limit circuit may also include an SCR for switching regenerative braking current to the device when the system is connected to power an electric motor.

King, Robert Dean (Schenectady, NY); DeDoncker, Rik Wivina Anna Adelson (Malvern, PA)

1998-01-01T23:59:59.000Z

434

Power conversion apparatus and method  

DOE Patents [OSTI]

A power conversion apparatus includes an interfacing circuit that enables a current source inverter to operate from a voltage energy storage device (voltage source), such as a battery, ultracapacitor or fuel cell. The interfacing circuit, also referred to as a voltage-to-current converter, transforms the voltage source into a current source that feeds a DC current to a current source inverter. The voltage-to-current converter also provides means for controlling and maintaining a constant DC bus current that supplies the current source inverter. The voltage-to-current converter also enables the current source inverter to charge the voltage energy storage device, such as during dynamic braking of a hybrid electric vehicle, without the need of reversing the direction of the DC bus current.

Su, Gui-Jia (Knoxville, TN)

2012-02-07T23:59:59.000Z

435

A miniature powerplant for very small, very long range autonomous aircraft. Final report  

SciTech Connect (OSTI)

The authors have developed a new piston engine offering unprecedented efficiency for a new generation of miniature robotic aircraft. Following Phase 1 preliminary design in 1996--97, they have gone forward in Phase 2 to complete detail design, and are nearing completion of a first batch of ten engines. A small-engine dynamometer facility has been built in preparation for the test program. Provisions have been included for supercharging, which will allow operation at ceilings in the 10,000 m range. Component tests and detailed analysis indicate that the engine will achieve brake-specific fuel consumption well below 300 gm/kWh at power levels of several hundred watts. This level of performance opens the door to development of tabletop-sized aircraft having transpacific range and multi-day endurance, which will offer extraordinary new capabilities for meteorology, geomagnetic, and a variety of applications in environmental monitoring and military operations.

Tad McGeer

1999-09-29T23:59:59.000Z

436

Highway Car Traffic as a Complex System: The Physicist's Point of View  

SciTech Connect (OSTI)

A simple cellular automaton model of highway car traffic flow will be presented. This system exhibits a second-order phase transition between the free-moving phase and the jammed phase. Using concepts borrowed from the theory of phase transitions in statistical physics, it can be shown that random braking is the symmetry-breaking field conjugate to the order parameter. For a given value of the speed limit, it is then possible to determine the values of the usual critical exponents using computer simulations. These numerical results can also be obtained within the framework of an approximate technique going beyond the mean-field approximation. It can be shown that the critical exponents satisfy a scaling relation, which can be derived assuming that the order parameter is a generalized homogeneous function in the vicinity of the phase transition point.

Boccara, Nino (University of Illinois at Chicago) [University of Illinois at Chicago

2005-04-20T23:59:59.000Z

437

21st Century Locomotive Technology: 2003 Annual Technical Status Report DOE/AL68284-TSR03  

SciTech Connect (OSTI)

The 21st Century Locomotive program objective is to develop 25% more efficient freight locomotives by 2010. Diesel engine-related research addresses advanced fuel injection, electric turbocharger and abradable seals. Assembly of a common rail fuel injection test system is underway, and a CFD combustion model has been validated. An electrically assisted turbocharger has been constructed and operated, meeting the generator mode design rating. System characterization and optimization is ongoing. Candidate abradable seal materials have been identified and test coupons prepared. Locomotive system-related research addresses capturing, storing and utilizing regenerative braking energy in a hybrid locomotive, and fuel optimization control. Hybrid locomotive energy storage requirements have been identified and studies on specific energy storage solutions are in progress. Energy management controls have been defined and testing initiated. Train and track parameter identification necessary for fuel optimization has been demonstrated.

Lembit Salasoo

2004-01-09T23:59:59.000Z

438

Simulations of the Fuel Economy and Emissions of Hybrid Transit Buses over Planned Local Routes  

SciTech Connect (OSTI)

We present simulated fuel economy and emissions city transit buses powered by conventional diesel engines and diesel-hybrid electric powertrains of varying size. Six representative city drive cycles were included in the study. In addition, we included previously published aftertreatment device models for control of CO, HC, NOx, and particulate matter (PM) emissions. Our results reveal that bus hybridization can significantly enhance fuel economy by reducing engine idling time, reducing demands for accessory loads, exploiting regenerative braking, and shifting engine operation to speeds and loads with higher fuel efficiency. Increased hybridization also tends to monotonically reduce engine-out emissions, but trends in the tailpipe (post-aftertreatment) emissions involve more complex interactions that significantly depend on motor size and drive cycle details.

Gao, Zhiming [ORNL] [ORNL; LaClair, Tim J [ORNL] [ORNL; Daw, C Stuart [ORNL] [ORNL; Smith, David E [ORNL] [ORNL; Franzese, Oscar [ORNL] [ORNL

2014-01-01T23:59:59.000Z

439

Near-term electric test vehicle ETV-2. Phase II. Final report  

SciTech Connect (OSTI)

A unique battery-powered passenger vehicle has been developed that provides a significant improvement over conventional electric vehicle performance, particularly during stop-and-go driving. The vehicle is unique in two major respects: (1) the power system incorporates a flywheel that stores energy during regenerative braking and makes possible the acceleration capability needed to keep up with traffic without reducing range to unacceptable values; and (2) lightweight plastic materials are used for the vehicle unibody to minimize weight and increase range. These features were analyzed and demonstrated in an electric test vehicle, ETV-2. Characteristics of this vehicle are summarized. Information is presented on: vehicle design, fabrication, safety testing, and performance testing; power system design and operation; flywheel; battery pack performance; and controls and electronic equipment. (LCL)

Not Available

1981-04-01T23:59:59.000Z

440

Nano-Scale Interpenetrating Phase Composites (IPC S) for Industrial and Vehicle Applications  

SciTech Connect (OSTI)

A one-year project was completed at Oak Ridge National Laboratory (ORNL) to explore the technical and economic feasibility of producing nano-scale Interpenetrating Phase Composite (IPC) components of a usable size for actual testing/implementation in a real applications such as high wear/corrosion resistant refractory shapes for industrial applications, lightweight vehicle braking system components, or lower cost/higher performance military body and vehicle armor. Nano-scale IPC s with improved mechanical, electrical, and thermal properties have previously been demonstrated at the lab scale, but have been limited in size. The work performed under this project was focused on investigating the ability to take the current traditional lab scale processes to a manufacturing scale through scaling of these processes or through the utilization of an alternative high-temperature process.

Hemrick, James Gordon [ORNL; Hu, Michael Z. [ORNL

2010-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Magnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts  

E-Print Network [OSTI]

A hypermassive neutron star (HMNS) is a possible transient formed after the merger of a neutron star binary. In the latest magnetohydrodynamic simulations in full general relativity, we find that a magnetized HMNS undergoes `delayed' collapse to a rotating black hole (BH) as a result of angular momentum transport via magnetic braking and the magnetorotational instability. The outcome is a BH surrounded by a massive, hot torus with a collimated magnetic field. The torus accretes onto the BH at a quasi-steady accretion rate ~10 solar mass/s; the lifetime of the torus is ~10 ms. The torus has a temperature \\sim 10^{12} K, leading to copious neutrino-antineutrino thermal radiation. Therefore, the collapse of an HMNS is a promising scenario for generating short-duration gamma-ray bursts and an accompanying burst of gravitational waves and neutrinos.

Masaru Shibata; Matthew D. Duez; Yuk Tung Liu; Stuart L. Shapiro; Branson C. Stephens

2005-11-04T23:59:59.000Z

442

A Waste Heat Recovery System for Light Duty Diesel Engines  

SciTech Connect (OSTI)

In order to achieve proposed fuel economy requirements, engines must make better use of the available fuel energy. Regardless of how efficient the engine is, there will still be a significant fraction of the fuel energy that is rejected in the exhaust and coolant streams. One viable technology for recovering this waste heat is an Organic Rankine Cycle. This cycle heats a working fluid using these heat streams and expands the fluid through a turbine to produce shaft power. The present work was the development of such a system applied to a light duty diesel engine. This lab demonstration was designed to maximize the peak brake thermal efficiency of the engine, and the combined system achieved an efficiency of 44.4%. The design of the system is discussed, as are the experimental performance results. The system potential at typical operating conditions was evaluated to determine the practicality of installing such a system in a vehicle.

Briggs, Thomas E [ORNL; Wagner, Robert M [ORNL; Edwards, Kevin Dean [ORNL; Curran, Scott [ORNL; Nafziger, Eric J [ORNL

2010-01-01T23:59:59.000Z

443

Electric vehicle drive train with direct coupling transmission  

DOE Patents [OSTI]

An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox. 6 figures.

Tankersley, J.B.; Boothe, R.W.; Konrad, C.E.

1995-04-04T23:59:59.000Z

444

Electric vehicle drive train with direct coupling transmission  

DOE Patents [OSTI]

An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox.

Tankersley, Jerome B. (Fredericksburg, VA); Boothe, Richard W. (Roanoke, VA); Konrad, Charles E. (Roanoke, VA)

1995-01-01T23:59:59.000Z

445

Advanced Natural Gas Reciprocating Engine(s)  

SciTech Connect (OSTI)

The objective of the Cummins ARES program, in partnership with the US Department of Energy (DOE), is to develop advanced natural gas engine technologies that increase engine system efficiency at lower emissions levels while attaining lower cost of ownership. The goals of the project are to demonstrate engine system achieving 50% Brake Thermal Efficiency (BTE) in three phases, 44%, 47% and 50% (starting baseline efficiency at 36% BTE) and 0.1 g/bhp-hr NOx system out emissions (starting baseline NOx emissions at 2 4 g/bhp-hr NOx). Primary path towards above goals include high Brake Mean Effective Pressure (BMEP), improved closed cycle efficiency, increased air handling efficiency and optimized engine subsystems. Cummins has successfully demonstrated each of the phases of this program. All targets have been achieved through application of a combined set of advanced base engine technologies and Waste Heat Recovery from Charge Air and Exhaust streams, optimized and validated on the demonstration engine and other large engines. The following architectures were selected for each Phase: Phase 1: Lean Burn Spark Ignited (SI) Key Technologies: High Efficiency Turbocharging, Higher Efficiency Combustion System. In production on the 60/91L engines. Over 500MW of ARES Phase 1 technology has been sold. Phase 2: Lean Burn Technology with Exhaust Waste Heat Recovery (WHR) System Key Technologies: Advanced Ignition System, Combustion Improvement, Integrated Waste Heat Recovery System. Base engine technologies intended for production within 2 to 3 years Phase 3: Lean Burn Technology with Exhaust and Charge Air Waste Heat Recovery System Key Technologies: Lower Friction, New Cylinder Head Designs, Improved Integrated Waste Heat Recovery System. Intended for production within 5 to 6 years Cummins is committed to the launch of next generation of large advanced NG engines based on ARES technology to be commercialized worldwide.

Pike, Edward

2014-03-31T23:59:59.000Z

446

Experimental Investigation of Fuel-Reactivity Controlled Compression Ignition (RCCI) Combustion Mode in a Multi-Cylinder, Light-Duty Diesel Engine  

SciTech Connect (OSTI)

An experimental study was performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (RCCI) combustion mode utilizing dual-fuel approach in a light-duty, multi-cylinder diesel engine. In-cylinder fuel blending using port fuel injection of gasoline before intake valve opening (IVO) and early-cycle, direct injection of diesel fuel was used as the charge preparation and fuel blending strategy. In order to achieve the desired auto-ignition quality through the stratification of the fuel-air equivalence ratio ( ), blends of commercially available gasoline and diesel fuel were used. Engine experiments were performed at an engine speed of 2300rpm and an engine load of 4.3bar brake mean effective pressure (BMEP). It was found that significant reduction in both nitrogen oxide (NOx) and particulate matter (PM) was realized successfully through the RCCI combustion mode even without applying exhaust gas recirculation (EGR). However, high carbon monoxide (CO) and hydrocarbon (HC) emissions were observed. The low combustion gas temperature during the expansion and exhaust processes seemed to be the dominant source of high CO emissions in the RCCI combustion mode. The high HC emissions during the RCCI combustion mode could be due to the increased combustion quenching layer thickness as well as the -stratification at the periphery of the combustion chamber. The slightly higher brake thermal efficiency (BTE) of the RCCI combustion mode was observed than the other combustion modes, such as the conventional diesel combustion (CDC) mode, and single-fuel, premixed charge compression ignition (PCCI) combustion mode. The parametric study of the RCCI combustion mode revealed that the combustion phasing and/or the peak cylinder pressure rise rate of the RCCI combustion mode could be controlled by several physical parameters premixed ratio (rp), intake swirl intensity, and start of injection (SOI) timing of directly injected fuel unlike other low temperature combustion (LTC) strategies.

Cho, Kukwon [ORNL] [ORNL; Curran, Scott [ORNL] [ORNL; Prikhodko, Vitaly Y [ORNL] [ORNL; Sluder, Scott [ORNL] [ORNL; Parks, II, James E [ORNL; Wagner, Robert M [ORNL] [ORNL

2011-01-01T23:59:59.000Z

447

Effect of E85 on RCCI Performance and Emissions on a Multi-Cylinder Light-Duty Diesel Engine - SAE World Congress  

SciTech Connect (OSTI)

This paper investigates the effect of E85 on load expansion and FTP modal point emissions indices under reactivity controlled compression ignition (RCCI) operation on a light-duty multi-cylinder diesel engine. A General Motors (GM) 1.9L four-cylinder diesel engine with the stock compression ratio of 17.5:1, common rail diesel injection system, high-pressure exhaust gas recirculation (EGR) system and variable geometry turbocharger was modified to allow for port fuel injection with gasoline or E85. Controlling the fuel reactivity in-cylinder by the adjustment of the ratio of premixed low-reactivity fuel (gasoline or E85) to direct injected high reactivity fuel (diesel fuel) has been shown to extend the operating range of high-efficiency clean combustion (HECC) compared to the use of a single fuel alone as in homogeneous charge compression ignition (HCCI) or premixed charge compression ignition (PCCI). The effect of E85 on the Ad-hoc federal test procedure (FTP) modal points is explored along with the effect of load expansion through the light-duty diesel speed operating range. The Ad-hoc FTP modal points of 1500 rpm, 1.0bar brake mean effective pressure (BMEP); 1500rpm, 2.6bar BMEP; 2000rpm, 2.0bar BMEP; 2300rpm, 4.2bar BMEP; and 2600rpm, 8.8bar BMEP were explored. Previous results with 96 RON unleaded test gasoline (UTG-96) and ultra-low sulfur diesel (ULSD) showed that with stock hardware, the 2600rpm, 8.8bar BMEP modal point was not obtainable due to excessive cylinder pressure rise rate and unstable combustion both with and without the use of EGR. Brake thermal efficiency and emissions performance of RCCI operation with E85 and ULSD is explored and compared against conventional diesel combustion (CDC) and RCCI operation with UTG 96 and ULSD.

Curran, Scott [ORNL; Hanson, Reed M [ORNL; Wagner, Robert M [ORNL

2012-01-01T23:59:59.000Z

448

AB Levitator and Electricity Storage  

E-Print Network [OSTI]

The author researched this new idea - support of flight by any aerial vehicles at significant altitude solely by the magnetic field of the planet. It is shown that current technology allows humans to create a light propulsion (AB engine) which does not depend on air, water or ground terrain. Simultaniosly, this revolutionary thruster is a device for the storage of electricity which is extracted and is replenished (during braking) from/into the storage with 100 percent efficiency. The relative weight ratio of this engine is 0.01 - 0.1 (from thrust). For some types of AB engine (toroidal form) the thrust easily may be changed in any direction without turning of engine. The author computed many projects using different versions of offered AB engine: small device for levitation-flight of a human (including flight from Earth to Outer Space), fly VTOL car (track), big VTOL aircrat, suspended low altitude stationary satellite, powerful Space Shuttle-like booster for travel to the Moon and Mars without spending energy (spended energy is replenished in braking when ship returns from other planet to its point of origin), using AB-devices in military, in sea-going ships (submarimes), in energy industry (for example. as small storage of electric energy) and so on. The vehicles equipped with AB propulsion can take flight for days and cover distances of tens thousands of kilometers at hypersonic or extra-atmosphere space speeds. The work contains tens of inventions and innovations which solves problems and breaks limitations which appear in solution of these very complex revolutionary ideas. Key word: AB levitator, levitation, non-rocket outer space flight, electric energy storage, AB propulsion, AB engine, Bolonkin.

Alexander Bolonkin

2007-03-01T23:59:59.000Z

449

Heavy and Overweight Vehicle Defects Interim Report  

SciTech Connect (OSTI)

The Federal Highway Administration (FHWA), along with the Federal Motor Carrier Safety Administration (FMCSA), has an interest in overweight commercial motor vehicles, how they affect infrastructure, and their impact on safety on the nation s highways. To assist both FHWA and FMCSA in obtaining more information related to this interest, data was collected and analyzed from two separate sources. A large scale nationwide data collection effort was facilitated by the Commercial Vehicle Safety Alliance as part of a special study on overweight vehicles and an additional, smaller set, of data was collected from the state of Tennessee which included a much more detailed set of data. Over a six-month period, 1,873 Level I inspections were performed in 18 different states that volunteered to be a part of this study. Of the 1,873 inspections, a vehicle out-of-service (OOS) violation was found on 44.79% of the vehicles, a rate significantly higher than the national OOS rate of 27.23%. The main cause of a vehicle being placed OOS was brake-related defects, with approximately 30% of all vehicles having an OOS brake violation. Only about 4% of vehicles had an OOS tire violation, and even fewer had suspension and wheel violations. Vehicle weight violations were most common on an axle group as opposed to a gross vehicle weight violation. About two thirds of the vehicles cited with a weight violation were overweight on an axle group with an average amount of weight over the legal limit of about 2,000 lbs. Data collection is scheduled to continue through January 2014, with more potentially more states volunteering to collect data. More detailed data collections similar to the Tennessee data collection will also be performed in multiple states.

Siekmann, Adam [ORNL; Capps, Gary J [ORNL

2012-12-01T23:59:59.000Z

450

Comparative Experimental Investigation of Combustion, Performance and Emission in a Single Cylinder Thermal Barrier Coated Diesel Engine using Diesel and Neem Biodiesel  

E-Print Network [OSTI]

Abstract- The use of methyl esters of vegetable oil known as biodiesel are increasingly popular because of their low impact on environment, green alternate fuel and most interestingly it's use in engines does not require major modification in the engine hardware. Use of biodiesel as sole fuel in conventional direct injection diesel engine results in combustion problems, hence it is proposed to use the biodiesel in low heat rejection (LHR) diesel engines with its significance characteristics of higher operating temperature, maximum heat release, higher brake thermal efficiency (BTE) and ability to handle the lower calorific value (CV) fuel. In this work biodiesel from Neem oil called as Neem oil methyl ester (NOME) was used as sole fuel in conventional diesel engine and LHR direct injection (Dl) diesel engine. The low heat rejection engine was developed with uniform ceramic coating of combustion chamber (includes piston crown, cylinder head, valves and cylinder liner) by partially stabilized /zirconia (PSZ) of 0.5 mm thickness. The experimental investigation was carried out in a single cylinder water-cooled LHR direct injection diesel engine. In this investigation, the combustion, performance and emission analysis were carried out in a diesel and biodiesel fueled conventional and LHR engine under identical operating conditions. The test result of biodiesel fueled LHR engine was quite identical to that of the conventional diesel engine. The brake thermal efficiency (BTE) of LHR engine with biodiesel is decreased marginally than LHR engine operated with diesel. Carbon monoxide (CO) and Hydrocarbon (HC) emission levels are decreased. The results of this comparative experimental investigation reveals that, some of the drawbacks of

M C Navindgi; Dr. Maheswar Dutta; Dr. B. Sudheer Prem Kumar

451

Performance and Emissions Characteristics of Bio-Diesel (B100)-Ignited Methane and Propane Combustion in a Four Cylinder Turbocharged Compression Ignition Engine  

SciTech Connect (OSTI)

Different combustion strategies and fuel sources are needed to deal with increasing fuel efficiency demands and emission restrictions. One possible strategy is dual fueling using readily available resources. Propane and natural gas are readily available with the current infrastructure and biodiesel is growing in popularity as a renewable fuel. This paper presents experimental results from dual fuel combustion of methane (as a surrogate for natural gas) and propane as primary fuels with biodiesel pilots in a 1.9 liter, turbocharged, 4 cylinder diesel engine at 1800 rev/min. Experiments were performed with different percentage energy substitutions (PES) of propane and methane and at different brake mean effective pressures (BMEP/bmep). Brake thermal efficiency (BTE) and emissions (NOx, HC, CO, CO2, O2 and smoke) were also measured. Maximum PES levels for B100-methane dual fuelling were limited to 70% at 2.5 bar bmep and 48% at 10 bar bmep, and corresponding values for B100-propane dual fuelling were 64% and 43%, respectively. Maximum PES was limited by misfire at 2.5 bar bmep and the onset of engine knock at 10 bar bmep. Dual fuel BTEs approached straight B100 values at 10 bar bmep while they were significantly lower than B100 values at 2.5 bar bmep. In general dual fuelling was beneficial in reducing NOx and smoke emissions by 33% and 50%, respectively from baseline B100 levels; however, both CO and THC emissions were significantly higher than baseline B100 levels at all PES and loads.

Shoemaker, N. T.; Gibson, C. M.; Polk, A. C.; Krishnan, S. R.; Srinivasan, K. K.

2011-10-05T23:59:59.000Z

452

DRIVE CYCLE EFFICIENCY AND EMISSIONS ESTIMATES FOR REACTIVITY CONTROLLED COMPRESSION IGNITION IN A MULTI-CYLINDER LIGHT-DUTY DIESEL ENGINE  

SciTech Connect (OSTI)

In-cylinder blending of gasoline and diesel to achieve Reactivity Controlled Compression Ignition (RCCI) has been shown to reduce NOx and PM emissions while maintaining or improving brake thermal efficiency as compared to conventional diesel combustion (CDC). The RCCI concept has an advantage over many advanced combustion strategies in that by varying both the percent of premixed gasoline and EGR rate, stable combustion can be extended over more of the light-duty drive cycle load range. Changing the percent premixed gasoline changes the fuel reactivity stratification in the cylinder providing further control of combustion phasing and pressure rise rate than the use of EGR alone. This paper examines the combustion and emissions performance of light-duty diesel engine using direct injected diesel fuel and port injected gasoline to carry out RCCI for steady-state engine conditions which are consistent with a light-duty drive cycle. A GM 1.9L four-cylinder engine with the stock compression ratio of 17.5:1, common rail diesel injection system, high-pressure EGR system and variable geometry turbocharger was modified to allow for port fuel injection with gasoline. Engine-out emissions, engine performance and combustion behavior for RCCI operation is compared against both CDC and a premixed charge compression ignition (PCCI) strategy which relies on high levels of EGR dilution. The effect of percent of premixed gasoline, EGR rate, boost level, intake mixture temperature, combustion phasing and pressure rise rate is investigated for RCCI combustion for the light-duty modal points. Engine-out emissions of NOx and PM were found to be considerably lower for RCCI operation as compared to CDC and PCCI, while HC and CO emissions were higher. Brake thermal efficiency was similar or higher for many of the modal conditions for RCCI operation. The emissions results are used to estimate hot-start FTP-75 emissions levels with RCCI and are compared against CDC and PCCI modes.

Curran, Scott [ORNL; Briggs, Thomas E [ORNL; Cho, Kukwon [ORNL; Wagner, Robert M [ORNL

2011-01-01T23:59:59.000Z

453

Smart Infrared Inspection System Field Operational Test Final Report  

SciTech Connect (OSTI)

The Smart InfraRed Inspection System (SIRIS) is a tool designed to assist inspectors in determining which vehicles passing through the SIRIS system are in need of further inspection by measuring the thermal data from the wheel components. As a vehicle enters the system, infrared cameras on the road measure temperatures of the brakes, tires, and wheel bearings on both wheel ends of commercial motor vehicles (CMVs) in motion. This thermal data is then presented to enforcement personal inside of the inspection station on a user friendly interface. Vehicles that are suspected to have a violation are automatically alerted to the enforcement staff. The main goal of the SIRIS field operational test (FOT) was to collect data to evaluate the performance of the prototype system and determine the viability of such a system being used for commercial motor vehicle enforcement. From March 2010 to September 2010, ORNL facilitated the SIRIS FOT at the Greene County Inspection Station (IS) in Greeneville, Tennessee. During the course of the FOT, 413 CMVs were given a North American Standard (NAS) Level-1 inspection. Of those 413 CMVs, 384 were subjected to a SIRIS screening. A total of 36 (9.38%) of the vehicles were flagged by SIRIS as having one or more thermal issues; with brakes issues making up 33 (91.67%) of those. Of the 36 vehicles flagged as having thermal issues, 31 (86.11%) were found to have a violation and 30 (83.33%) of those vehicles were placed out-of-service (OOS). Overall the enforcement personnel who have used SIRIS for screening purposes have had positive feedback on the potential of SIRIS. With improvements in detection algorithms and stability, the system will be beneficial to the CMV enforcement community and increase overall trooper productivity by accurately identifying a higher percentage of CMVs to be placed OOS with minimal error. No future evaluation of SIRIS has been deemed necessary and specifications for a production system will soon be drafted.

Siekmann, Adam [ORNL; Capps, Gary J [ORNL; Franzese, Oscar [ORNL; Lascurain, Mary Beth [ORNL

2011-06-01T23:59:59.000Z

454

An Analysis of Energy Savings Possible Through Advances in Automotive Tooling Technology  

SciTech Connect (OSTI)

The use of lightweight and highly formable advanced materials in automobile and truck manufacturing has the potential to save fuel. Advances in tooling technology would promote the use of these materials. This report describes an energy savings analysis performed to approximate the potential fuel savings and consequential carbon-emission reductions that would be possible because of advances in tooling in the manufacturing of, in particular, non-powertrain components of passenger cars and heavy trucks. Separate energy analyses are performed for cars and heavy trucks. Heavy trucks are considered to be Class 7 and 8 trucks (trucks rated over 26,000 lbs gross vehicle weight). A critical input to the analysis is a set of estimates of the percentage reductions in weight and drag that could be achieved by the implementation of advanced materials, as a consequence of improved tooling technology, which were obtained by surveying tooling industry experts who attended a DOE Workshop, Tooling Technology for Low-Volume Vehicle Production, held in Seattle and Detroit in October and November 2003. The analysis is also based on 2001 fuel consumption totals and on energy-audit component proportions of fuel use due to drag, rolling resistance, and braking. The consumption proportions are assumed constant over time, but an allowance is made for fleet growth. The savings for a particular component is then the product of total fuel consumption, the percentage reduction of the component, and the energy audit component proportion. Fuel savings estimates for trucks also account for weight-limited versus volume-limited operations. Energy savings are assumed to be of two types: (1) direct energy savings incurred through reduced forces that must be overcome to move the vehicle or to slow it down in braking. and (2) indirect energy savings through reductions in the required engine power, the production and transmission of which incur thermodynamic losses, internal friction, and other inefficiencies. Total savings for an energy use component are estimated by scaling up the direct savings with an approximate total-to-direct savings ratio. Market penetration for new technology vehicles is estimated from projections about scrappage. Retrofit savings are assumed negligible, but savings are also assumed to accrue with increases in the fleet size, based on economic growth forecasts. It is assumed that as vehicles in the current fleet are scrapped, they are replaced with advanced-technology vehicles. Saving estimates are based on proportions of new vehicles, rather than new-vehicle mileages. In practice, of course, scrapped vehicles are often replaced with used vehicles, and used vehicles are replaced with new vehicles. Because new vehicles are typically driven more than old, savings estimates based on count rather than mileage proportions tend to be biased down (i.e., conservative). Savings are expressed in terms of gallons of fuel saved, metric tons of CO2 emissions reductions, and percentages relative to 2001 levels of fuel and CO2. The sensitivity of the savings projections to inputs such as energy-audit proportions of fuel consumed for rolling resistance, drag, braking, etc. is assessed by considering different scenarios. Though based on many approximations, the estimates approximate the potential energy savings possible because of improvements in tooling. For heavy trucks, annual diesel savings of 2.4-6.8 percent, and cumulative savings on the order of 54-154 percent, of 2001 consumption could accrue by 2050. By 2050, annual gasoline savings of 2.8-12 percent, and cumulative savings on the order of 83-350 percent of 2001 consumption could accrue for cars.

Rick Schmoyer, RLS

2004-12-03T23:59:59.000Z

455

Northeast regional biomass program: Second and Third quarterlies and final report, January 1994--September 30, 1994  

SciTech Connect (OSTI)

The Northeast Regional Biomass Program (NRBP) is comprised of the following states: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania. Rhode Island and Vermont. It is managed for the Department of Energy (DOE) by the CONEG Policy Research Center, Inc. The Northeast states face several near-term barriers to the expanded use of biomass energy. Informational and technical barriers have impeded industrial conversions, delaying the development of a wood energy supply infrastructure. Concern over the environmental impacts on resources are not well understood. Public awareness and concern about safety issues surrounding wood energy use has also grown to the point of applying a brake to the trend of increases in residential applications of biomass energy. In addition, many residential, commercial, industrial, and commercial energy users are discouraged from using biomass energy because of the convenience factor. Regardless of the potential for cost savings, biomass energy sources, aside from being perceived as more esoteric, are also viewed as more work for the user. The Northeast Regional Biomass Program (NRBP) is designed to help the eleven states overcome obstacles and achieve biomass energy potentials.

NONE

1995-07-01T23:59:59.000Z

456

Northeast Regional Biomass Program first and second quarter reports, October 1, 1994--March 31, 1995  

SciTech Connect (OSTI)

The Northeast states face several near-term barriers to the expanded use of biomass energy. Informational and technical barriers have impeded industrial conversions, delaying the development of a wood energy supply infrastructure. Concern over the environmental impacts on resources are not well understood. Public awareness and concern about safety issues surrounding wood energy use has also grown to the point of applying a brake to the trend of increases in residential applications of biomass energy. In addition, many residential commercial, industrial, and commercial energy users are discouraged from using biomass energy because of the convenience factor. Regardless of the potential for cost savings, biomass energy sources, aside from being perceived as more esoteric, are also viewed as more work for the user. The Northeast Regional biomass Program (NRBP) is designed to help the eleven Northeastern states overcome these obstacles and achieve their biomass energy potentials. The objective of this program in the current and future years is to increase the role of biomass fuels in the region`s energy mix by providing the impetus for states and the private sector to develop a viable Northeast biomass fuels market. This paper contains a management report, state program summaries, technical project status report, and technology transfer activities.

NONE

1995-07-01T23:59:59.000Z

457

Radioisotope Electric Propulsion for Deep Space Sample Return  

SciTech Connect (OSTI)

The need to answer basic questions regarding the origin of the Solar System will motivate robotic sample return missions to destinations like Pluto, its satellite Charon, and objects in the Kuiper belt. To keep the mission duration short enough to be of interest, sample return from objects farther out in the Solar System requires increasingly higher return velocities. A sample return mission involves several complicated steps to reach an object and obtain a sample, but only the interplanetary return phase of the mission is addressed in this paper. Radioisotope electric propulsion is explored in this parametric study as a means to propel small, dedicated return vehicles for transferring kilogram-size samples from deep space to Earth. Return times for both Earth orbital rendezvous and faster, direct atmospheric re-entry trajectories are calculated for objects as far away as 100 AU. Chemical retro-rocket braking at Earth is compared to radioisotope electric propulsion but the limited deceleration capability of chemical rockets forces the return trajectories to be much slower.

Noble, Robert J.; /SLAC

2009-07-14T23:59:59.000Z

458

Electric vehicles move closer to market  

SciTech Connect (OSTI)

This article reports that though battery technology is currently limiting the growth of EVs, the search for improvements is spurring innovative engineering developments. As battery makers, automakers, national laboratories, and others continue their search for a practical source of electric power that will make electric vehicles (EVs) more viable, engineers worldwide are making progress in other areas of EV development. Vector control, for example, enables better regulation of motor torque and speed; composite and aluminum parts reduce the vehicle`s weight, which in turn reduces the load on the motor and battery; and flywheel energy storage systems, supercapacitors, regenerative brake systems, and hybrid/electric drive trains increase range and acceleration. Despite efforts to develop an electric vehicle from the ground up, most of the early EVs to be sold in the United States will likely be converted from gasoline-powered vehicles. Chrysler Corp., for example, is expected to sell electric versions of its minivans and build them on the same assembly line as its gasoline-powered vehicles to reduce costs. The pace of engineering development in this field is fast and furious. Indeed, it is virtually impossible to monitor all emerging EV technology. To meet their quotas, the major automakers may even consider buying credits from smaller, innovative EV manufacturers. But whatever stopgap measures vehicle makers take, technology development will be the driving force behind long-term EV growth.

O`Connor, L.

1995-03-01T23:59:59.000Z

459

Light-Duty Drive Cycle Simulations of Diesel Engine-Out Exhaust Properties for an RCCI-Enabled Vehicle  

SciTech Connect (OSTI)

In-cylinder blending of gasoline and diesel fuels to achieve low-temperature reactivity controlled compression ignition (RCCI) can reduce NOx and PM emissions while maintaining or improving brake thermal efficiency compared to conventional diesel combustion (CDC). Moreover, the dual-fueling RCCI is able to achieve these benefits by tailoring combustion reactivity over a wider range of engine operation than is possible with a single fuel. However, the currently demonstrated range of stable RCCI combustion just covers a portion of the engine speed-load range required in several light-duty drive cycles. This means that engines must switch from RCCI to CDC when speed and load fall outside of the stable RCCI range. In this study we investigated the impact of RCCI as it has recently been demonstrated on practical engine-out exhaust temperature and emissions by simulating a multi-mode RCCI-enabled vehicle operating over two urban and two highway driving cycles. To implement our simulations, we employed experimental engine maps for a multi-mode RCCI/CDC engine combined with a standard mid-size, automatic transmission, passenger vehicle in the Autonomie vehicle simulation platform. Our results include both detailed transient and cycle-averaged engine exhaust temperature and emissions for each case, and we note the potential implications of the modified exhaust properties on catalytic emissions control and utilization of waste heat recovery on future RCCI-enabled vehicles.

Gao, Zhiming [ORNL] [ORNL; Curran, Scott [ORNL] [ORNL; Daw, C Stuart [ORNL] [ORNL; Wagner, Robert M [ORNL] [ORNL

2013-01-01T23:59:59.000Z

460

Field Operations Program Activities Status Report  

SciTech Connect (OSTI)

The Field Operations Program is an electric vehicle testing and evaluation program sponsored by US Department of Energy and managed by the Idaho National Engineering and Environmental Laboratory. The Program's goals are to evaluate electric vehicles in real-world applications and environments, support electric vehicle technology advancement, develop infrastructure elements necessary to support significant electric vehicle use, support increased use of electric vehicles in federal fleets, and increase overall awareness and acceptance of electric vehicles. This report covers Program activities from fiscal year 1997 through mid-fiscal year 1999. The Field Operations Program succeeded the Site Operator Program, which ended in September 1996. Electric vehicle testing conducted by the Program includes baseline performance testing (EV America testing), accelerated reliability (life-cycle) testing, and fleet testing. The baseline performance parameters include accelerations, braking, range, energy efficiency, and charging time. The Program collects accelerated reliability and fleet operations data on electric vehicles operated by the Program's Qualified Vehicle Testing (QVT) partners. The Program's QVT partners have over 3 million miles of electric vehicle operating experience.

J. E. Francfort; D. V. O'Hara; L. A. Slezak

1999-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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

Workshop on diamond and diamond-like-carbon films for the transportation industry  

SciTech Connect (OSTI)

Applications exist in advanced transportation systems as well as in manufacturing processes that would benefit from superior tribological properties of diamond, diamond-like-carbon and cubic boron nitride coatings. Their superior hardness make them ideal candidates as protective coatings to reduce adhesive, abrasive and erosive wear in advanced diesel engines, gas turbines and spark-ignited engines and in machining and manufacturing tools as well. The high thermal conductivity of diamond also makes it desirable for thermal management not only in tribological applications but also in high-power electronic devices and possibly large braking systems. A workshop has been recently held at Argonne National Laboratory entitled ``Diamond and Diamond-Like-Carbon Films for Transportation Applications`` which was attended by 85 scientists and engineers including top people involved in the basic technology of these films and also representatives from many US industrial companies. A working group on applications endorsed 18 different applications for these films in the transportation area alone. Separate abstracts have been prepared.

Nichols, F.A.; Moores, D.K. [eds.

1993-01-01T23:59:59.000Z

462

HCCI engine control by thermal management  

SciTech Connect (OSTI)

This work investigates a control system for HCCI engines, where thermal energy from exhaust gas recirculation (EGR) and compression work in the supercharger are either recycled or rejected as needed. HCCI engine operation is analyzed with a detailed chemical kinetics code, HCT (Hydrodynamics, Chemistry and Transport), that has been extensively modified for application to engines. HCT is linked to an optimizer that determines the operating conditions that result in maximum brake thermal efficiency, while meeting the restrictions of low NO{sub x} and peak cylinder pressure. The results show the values of the operating conditions that yield optimum efficiency as a function of torque and RPM. For zero torque (idle), the optimizer determines operating conditions that result in minimum fuel consumption. The optimizer is also used for determining the maximum torque that can be obtained within the operating restrictions of NO{sub x} and peak cylinder pressure. The results show that a thermally controlled HCCI engine can successfully operate over a wide range of conditions at high efficiency and low emissions.

Martinez-Frias, J; Aceves, S M; Flowers, D; Smith, J R; Dibble, R

2000-05-11T23:59:59.000Z

463

Equivalence Ratio-EGR Control of HCCI Engine Operation and the Potential for Transition to Spark-Ignited Operation  

SciTech Connect (OSTI)

This research investigates a control system for HCCI engines, where equivalence ratio, fraction of EGR and intake pressure are adjusted as needed to obtain satisfactory combustion. HCCI engine operation is analyzed with a detailed chemical kinetics code, HCT (Hydrodynamics, Chemistry and Transport), that has been extensively modified for application to engines. HCT is linked to an optimizer that determines the operating conditions that result in maximum brake thermal efficiency, while meeting the peak cylinder pressure restriction. The results show the values of the operating conditions that yield optimum efficiency as a function of torque and rpm. The engine has high NO{sub x} emissions for high power operation, so the possibility of switching to stoichiometric operation for high torque conditions is considered. Stoichiometric operation would allow the use of a three-way catalyst to reduce NO{sub x} emissions to acceptable levels. Finally, the paper discusses the possibility of transitioning from HCCI operation to SI operation to achieve high power output.

Martinez-Frias, J; Aceves, S M; Flowers, D L; Smith, J R; Dibble, R

2001-07-31T23:59:59.000Z

464

Evolution of Compact-Binary Populations in Globular Clusters: A Boltzmann Study. I. The Continuous Limit  

E-Print Network [OSTI]

We explore a Boltzmann scheme for studying the evolution of compact binary populations of globular clusters. We include processes of compact-binary formation by tidal capture and exchange encounters, binary destruction by dissociation and other mechanisms, and binary hardening by encounters, gravitational radiation and magnetic braking, as also the orbital evolution during mass transfer, following Roche lobe contact. For the encounter processes which are stochastic in nature, we study the probabilistic, continuous limit in this introductory work, deferring the specific handling of the stochastic terms to the next step. We focus on the evolution of (a) the number of X-ray sources N_{XB} in globular clusters, and (b) the orbital-period distribution of the X-ray binaries, as a result of the above processes. We investigate the dependence of N_{XB} on two essential cluster properties, namely, the star-star and star-binary encounter-rate parameters 'Gamma' and 'gamma', which we call Verbunt parameters. We compare our model results with observation, showing that the model values of N_{XB} and their expected scaling with the Verbunt parameters are in good agreement with results from recent X-ray observations of Galactic globular clusters, encouraging us to build more detailed models.

Sambaran Banerjee; Pranab Ghosh

2007-08-10T23:59:59.000Z

465

Northeast regional biomass program. Second & third quarterly reports, October 1, 1995--March 31, 1996  

SciTech Connect (OSTI)

The Northeast Regional Biomass Program (NRBP) is comprised of the following states: Connecticut. Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island and Vermont. It is managed for the Department of Energy (DOE) by the CONEG Policy Research Center, Inc. The Northeast states face several near-term barriers to the expanded use of biomass energy. Informational and technical barriers have impeded industrial conversions, delaying the development of a wood energy supply infrastructure. Concern over the environmental impacts on resources are not well understood. Public awareness and concern about safety issues surrounding wood energy use has also grown to the point of applying a brake to the trend of increases in residential applications of biomass energy. In addition, many residential, industrial, and commercial energy users are discouraged from using biomass energy because of the convenience factor. Regardless of the potential for cost savings, biomass energy sources, aside from being perceived as more esoteric, are also viewed as more work for the user. The Northeast Regional Biomass Program (NRBP) is designed to help the eleven Northeastern states overcome these obstacles and achieve their biomass energy potentials. The objective of this program in the current and future years is to increase the role of biomass fuels in the region`s energy mix by providing the impetus for states and the private sector to develop a viable Northeast biomass fuels market.

NONE

1996-07-01T23:59:59.000Z

466

A spinning mirror for fast angular scans of EBW emission for magnetic pitch profile measurements  

SciTech Connect (OSTI)

A tilted spinning mirror rapidly steers the line of sight of the electron Bernstein wave (EBW) emission radiometer at the Mega-Amp Spherical Tokamak (MAST). In order to resist high mechanical stresses at rotation speeds of up to 12 000 rpm and to avoid eddy current induced magnetic braking, the mirror consists of a glass-reinforced nylon substrate of a special self-balanced design, coated with a reflecting layer. By completing an angular scan every 2.5-10 ms, it allows one to characterize with good time resolution the Bernstein-extraordinary-ordinary mode-conversion efficiency as a function of the view angles. Angular maps of conversion efficiency are directly related to the magnetic pitch angle at the cutoff layer for the ordinary mode. Hence, measurements at various frequencies provide the safety factor profile at the plasma edge. Initial measurements and indications of the feasibility of the diagnostic are presented. Moreover, angular scans indicate the best launch conditions for EBW heating.

Volpe, Francesco [Department of Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

2010-10-15T23:59:59.000Z

467

Fumigation of alcohol in a light duty automotive diesel engine  

SciTech Connect (OSTI)

A light-duty automotive diesel engine was fumigated with methanol and ethanol in amounts up to 35% and 50% of the total fuel energy respectively. The main purpose of this study was to determine the effect of alcohol (methanol and ethanol) fumigation on engine performance at various operating conditions. Engine fuel efficiency, emissions, smoke, and the occurrence of severe knock were the parameters used to evaluate performance. Raw exhaust particulate and its soluble organic extract were screened for biological activity using the Ames Salmonella typhimurium assay. Results are given for a test matrix made up of twelve steady-state operating conditions. For all conditions except the 1/4 rack (light load) condition, modest thermal efficiency gains were noted upon ethanol fumigation. Methanol showed the same increase at 3/4 and full rack (high load) conditions. However, engine roughness or the occurrence of severe knock limited the maximum amount of alcohol that could be fumigated. Brake specific NO/sub x/ concentrations were found to decrease for all ethanol conditions tested. Oxides of nitrogen emissions, on a volume basis, decreased for all alcohol conditions tested. Based on the limited particulate data analyzed, it appears as though ethanol fumigation, like methanol fumigation, while lowering the mass of particulate emitted, does enhance the biological activity of that particulate.

Broukhiyan, E.M.H.; Lestz, S.S.

1981-08-01T23:59:59.000Z

468

Feasibility study of a 6V-92TA homogeneous auto-ignited two-stroke (HAT) compressed-natural-gas-engine. Topical report, August 1989-May 1990  

SciTech Connect (OSTI)

The objective of the project was to modify a two-stroke 6V-92TA diesel engine to operate on natural gas using a simple system with gas addition to the compressor inlet and a spark plug for cold start and non-autoignition engine operation. The engine was to be operated at most speed-load conditions by autoignition of the premixed gas-air mixture. This concept is referred to as the Homogeneous Auto-Ignited Two-Stroke (HAT). Autoignition of carbureted natural gas was achieved at various loads and speeds in a 6V-92TA engine modified for operating on natural gas with the HAT concept. However, HAT engine operation up to 277 hp at 2100 rpm (diesel coach rating) was not achieved because early ignition in some cylinders caused knock and excessive heat transfer. Instead, the engine was operated up to 226 hp (767 N.m) at 2100 rpm, 181 hp (780 N.m) at 1650 rpm, 130 hp (773 N.m) at 1200 rpm, and 34 hp (368 N.m) at 650 rpm. Maximum brake thermal efficiency measured was 33.4% at 2100 rpm/219 hp. The corrected efficiency (to compensate for the unburned natural gas lost during the scavenging process) was higher than this. Steady-state emissions show very low NOx, total unburned HC lower than expected and reasonable CO levels. The lean air-fuel mixture and unburned exhaust gases in the cylinder resulted in very low NOx emissions.

Kakwani, R.M.; Winsor, R.E.

1990-08-01T23:59:59.000Z

469

Ethanol fuel for diesel tractors  

SciTech Connect (OSTI)

The use of ethanol fuel in turbocharged diesel tractors is considered. The investigation was performed to evaluate the conversion of a diesel tractor for dual-fueling with ethanol by attaching a carburetor to the inlet air system or with the use of an alcohol spray-injection kit. In this system the mixture of water and alcohol is injected into the air stream by means of pressure from the turbocharger. The carburetor was attached to a by-pass apparatus which allowed the engine to start and shut off on diesel alone. Approximately 46% of the energy for the turbocharged 65 kW diesel tractor could be supplied by carbureted ethanol, and about 30% by the spray-injection approach. Knock limited the extent of substitution of ethanol for diesel fuel. The dual-fueling with ethanol caused a slight increase in brake thermal efficiency. Exhaust temperatures were much lower for equivalent high torque levels. Maximum power was increased by 36% with the spray-injection approach and about 59% with carburetion.

da Cruz, J.M.

1981-01-01T23:59:59.000Z

470

Calculation of Neoclassical Toroidal Viscosity with a Particle Simulation in the Tokamak Magnetic Breaking Experiments  

SciTech Connect (OSTI)

Accurate calculation of perturbed distribution function #14;?f and perturbed magnetic fi eld #14;?B is essential to achieve prediction of non-ambipolar transport and neoclassical toroidal viscosity (NTV) in perturbed tokamaks. This paper reports a study of the NTV with a #14;?f particle code (POCA) and improved understanding of magnetic braking in tokamak experiments. POCA calculates the NTV by computing #14;f with guiding-center orbit motion and using #14;B from the ideal perturbed equilibrium code (IPEC). POCA simulations are compared with experimental estimations for NTV, which are measured from angular momentum balance (DIII-D) and toroidal rotational damping rate (NSTX). The calculation shows good agreement in total NTV torque for the DIII-D discharge, where an analytic neoclassical theory also gives a consistent result thanks to relatively large aspect-ratio and slow toroidal rotations. In NSTX discharges, where the aspect-ratio is small and the rotation is fast, the theory only gives a qualitative guide for predicting NTV. However, the POCA simulation largely improves the quantitative NTV prediction for NSTX. It is discussed that a self- consistent calculation of ?#14;B using general perturbed equilibria is eventually necessary since a non-ideal plasma response can change the perturbed eld and thereby the NTV torque.

Kimin Kim, et al

2013-04-23T23:59:59.000Z

471

Static properties and multiaxial strength criterion for design of composite automotive structures  

SciTech Connect (OSTI)

The Durability of Lightweight Composite Structures Project was established at Oak Ridge National Laboratory (ORNL) by the US Department of Energy to provide the experimentally-based, durability-driven design guidelines necessary to assure long-term structural integrity of automotive composite components. The initial focus of the ORNL Durability Project was on one representative reference material -- an isocyanurate (polyurethane) reinforced with continuous strand, swirl-mat E-glass. The present paper describes tensile, compressive, flexure, and shear testing and results for the reference composite. Behavioral trends and proportional limit are established for both tension and compression. Damage development due to tensile loading, strain rate effects, and effects of temperature are discussed. Furthermore, effects on static properties of various fluids, including water at room and elevated temperatures, salt water, antifreeze, windshield washer fluid, used motor oil, battery acid, gasoline, and brake fluid, were investigated. Effects of prior loading were evaluated as well. Finally, the effect of multiaxial loading on strength was determined, and the maximum shear strength criterion was identified for design.

Ruggles, M.B.; Yahr, G.T.; Battiste, R.L.

1998-11-01T23:59:59.000Z

472

Measuring M dwarf Winds with DAZ White Dwarfs  

E-Print Network [OSTI]

Hydrogen atmosphere white dwarfs with metal lines, so-called DAZs, show evidence for ongoing accretion of material onto their surfaces. Some DAZs are known to have unresolved M dwarf companions, which could account for the observed accretion through a stellar wind. I combine observed Ca abundances of the DAZs with information on the orbital separation of their M dwarf companions to infer the mass loss rate of the M dwarfs. I find that for three of the six known DAZs with M dwarf companions, a stellar wind can plausibly explain the observed accretion on the white dwarfs assuming Bondi-Hoyle accretion of solar abundance stellar winds on the order of 10$^{-14}-10^{-16}\\Msun$ yr$^{-1}$. The rest of the sample have companions with orbits $\\gtorder$ 1~AU, and require companion mass loss rates of $> 10^{-11}\\Msun$ yr$^{-1}$. I conclude that there must be an alternative explanation for accretion of material onto DAZs with widely separated companions. The inferred winds for two of the close binaries are orders of magnitude smaller than typically assumed for the angular momentum loss of red dwarf-white dwarf pairs due to magnetic braking from a stellar wind and may seriously affect predictions for the formation rate of CVs with low mass companions.

J. H. Debes

2006-08-01T23:59:59.000Z

473

Buoyancy and Penrose Process Produce Jets from Rotating Black Holes  

E-Print Network [OSTI]

The exact mechanism by which astrophysical jets are formed is still unknown. It is believed that necessary elements are a rotating (Kerr) black hole and a magnetised accreting plasma. We model the accreting plasma as a collection of magnetic flux tubes/strings. If such a tube falls into a Kerr black hole, then the leading portion loses angular momentum and energy as the string brakes, and to compensate for this loss, momentum and energy is redistributed to the trailing portion of the tube.} {We found that buoyancy creates a pronounced helical magnetic field structure aligned with the spin axis. Along the field lines, the plasma is centrifugally accelerated close to the speed of light. This process leads to unlimited stretching of the flux tube since one part of the tube continues to fall into the black hole and simultaneously the other part of the string is pushed outward. Eventually, reconnection cuts the tube, the inner part is filled with new material and the outer part forms a collimated bubble-structured...

Semenov, V S; Heyn, M F

2014-01-01T23:59:59.000Z

474

Site operator program final report for fiscal years 1992 through 1996  

SciTech Connect (OSTI)

The Site Operator Program was an electric vehicle testing and evaluation program sponsored by US Department of Energy and managed at the Idaho National Engineering and Environmental Laboratory. The Program`s goals included the field evaluation of electric vehicles in real-world applications and environments; the support of electric vehicle technology advancement; the development of infrastructure elements necessary to support significant electric vehicle use; and increasing the awareness and acceptance of electric vehicles. This report covers Program activities from 1992 to 1996. The Site Operator Program ended in September 1996, when it was superseded by the Field Operations Program. Electric vehicle testing included baseline performance testing, which was performed in conjunction with EV America. The baseline performance parameters included acceleration, braking, range, energy efficiency, and charging time. The Program collected fleet operations data on electric vehicles operated by the Program`s thirteen partners, comprising electric utilities, universities, and federal agencies. The Program`s partners had over 250 electric vehicles, from vehicle converters and original equipment manufacturers, in their operating fleets. Test results are available via the World Wide Web site at http://ev.inel.gov/sop.

Francfort, J.E. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab.; Bassett, R.R. [Sandia National Labs., Albuquerque, NM (United States); Birasco, S. [Los Angeles Dept. of Water and Power, CA (United States)] [and others

1998-01-01T23:59:59.000Z

475

Beyond Mixing-length Theory: a step toward 321D  

E-Print Network [OSTI]

We present a physical basis for algorithms to replace mixing-length theory (MLT) in stellar evolutionary computations. The 321D procedure is based on three-dimensional (3D) time-dependent solutions of the Navier-Stokes equations, including the Kolmogorov cascade as a sub-grid model of dissipation (implicit large eddy simulations; ILES). We use Reynolds-averaged Navier-Stokes (RANS) averaging to make 3D simulation data concise, and use 3D simulations to give RANS closure. We sketch a simple algorithm, which is non-local and time-dependent, with both MLT and the Lorenz convective roll as particular subsets of solutions. The damping length is determined from a balance between the large-scale driving and damping at the Kolmogorov scale. We find that (1) braking regions (boundary layers in which mixing occurs) automatically appear {\\it beyond} the edges of convection as defined by the Schwarzschild criterion, (2) dynamic (non-local) terms imply a non-zero turbulent kinetic energy flux (unlike MLT), (3) the effects...

Arnett, W David; Viallet, Maxime; Campbell, Simon W; Lattanzio, John; Mo?ak, Miroslav

2015-01-01T23:59:59.000Z

476

Dynamos in Asymptotic-Giant-Branch Stars As the Origin of Magnetic Fields Shaping Planetary Nebulale  

E-Print Network [OSTI]

Planetary nebulae are thought to be formed when a slow wind from the progenitor giant star is overtaken by a subsequent fast wind generated as the star enters its white dwarf stage$^{1}$. A shock forms near the boundary between the winds, which creates a relatively dense shell that provides the characteristic appearance of a planetary nebula. A spherically symmetric wind will produce a spherically symmetric shell, yet over half of known planetary nebulae are not spherical; rather, they are elliptical or bipolar in shape$^{2}$. While a magnetic field could launch and collimate a bipolar outflow, the origin of such a field has hitherto been unclear, as previous work suggested that a field could not be generated${^3}$. Here we show that an asymptotic-giant-branch (AGB) star can indeed generate a strong magnetic field, in a dynamo at the interface between a rapidly rotating core and the more slowly rotating envelope of the star. The field is strong enough to shape the bipolar outflows that produce the observed bipolar planetary nebulae. Magnetic braking of the stellar core during this process may also explain the puzzlingly$^{4}$ slow rotation of most white dwarf stars.

Eric G. Blackman; Adam Frank; J. Andrew Markiel; John H. Thomas; Hugh M. Van Horn

2001-01-27T23:59:59.000Z

477

Use of Fault Tree Analysis for Automotive Reliability and Safety Analysis  

SciTech Connect (OSTI)

Fault tree analysis (FTA) evolved from the aerospace industry in the 1960's. A fault tree is deductive logic model that is generated with a top undesired event in mind. FTA answers the question, ''how can something occur?'' as opposed to failure modes and effects analysis (FMEA) that is inductive and answers the question, ''what if?'' FTA is used in risk, reliability and safety assessments. FTA is currently being used by several industries such as nuclear power and chemical processing. Typically the automotive industries uses failure modes and effects analysis (FMEA) such as design FMEAs and process FMEAs. The use of FTA has spread to the automotive industry. This paper discusses the use of FTA for automotive applications. With the addition automotive electronics for various applications in systems such as engine/power control, cruise control and braking/traction, FTA is well suited to address failure modes within these systems. FTA can determine the importance of these failure modes from various perspectives such as cost, reliability and safety. A fault tree analysis of a car starting system is presented as an example.

Lambert, H

2003-09-24T23:59:59.000Z

478

Wind turbine having a direct-drive drivetrain  

DOE Patents [OSTI]

A wind turbine (100) comprising an electrical generator (108) that includes a rotor assembly (112). A wind rotor (104) that includes a wind rotor hub (124) is directly coupled to the rotor assembly via a simplified connection. The wind rotor and generator rotor assembly are rotatably mounted on a central spindle (160) via a bearing assembly (180). The wind rotor hub includes an opening (244) having a diameter larger than the outside diameter of the central spindle adjacent the bearing assembly so as to allow access to the bearing assembly from a cavity (380) inside the wind rotor hub. The spindle is attached to a turret (140) supported by a tower (136). Each of the spindle, turret and tower has an interior cavity (172, 176, 368) that permits personnel to traverse therethrough to the cavity of the wind rotor hub. The wind turbine further includes a frictional braking system (276) for slowing, stopping or keeping stopped the rotation of the wind rotor and rotor assembly.

Bevington, Christopher M.; Bywaters, Garrett L.; Coleman, Clint C.; Costin, Daniel P.; Danforth, William L.; Lynch, Jonathan A.; Rolland, Robert H.

2008-10-07T23:59:59.000Z

479

PASSIVE DETECTION OF VEHICLE LOADING  

SciTech Connect (OSTI)

The Digital Imaging and Remote Sensing Laboratory (DIRS) at the Rochester Institute of Technology, along with the Savannah River National Laboratory is investigating passive methods to quantify vehicle loading. The research described in this paper investigates multiple vehicle indicators including brake temperature, tire temperature, engine temperature, acceleration and deceleration rates, engine acoustics, suspension response, tire deformation and vibrational response. Our investigation into these variables includes building and implementing a sensing system for data collection as well as multiple full-scale vehicle tests. The sensing system includes; infrared video cameras, triaxial accelerometers, microphones, video cameras and thermocouples. The full scale testing includes both a medium size dump truck and a tractor-trailer truck on closed courses with loads spanning the full range of the vehicle's capacity. Statistical analysis of the collected data is used to determine the effectiveness of each of the indicators for characterizing the weight of a vehicle. The final sensing system will monitor multiple load indicators and combine the results to achieve a more accurate measurement than any of the indicators could provide alone.

Garrett, A.

2012-01-03T23:59:59.000Z

480

A high-resolution spectropolarimetric survey of Herbig Ae/Be stars - II. Rotation  

E-Print Network [OSTI]

We report the analysis of the rotational properties of our sample of Herbig Ae/Be (HAeBe) and related stars for which we have obtained high-resolution spectropolarimetric observations. Using the projected rotational velocities measured at the surface of the stars, we have calculated the angular momentum of the sample and plotted it as a function of age. We have then compared the angular momentum and the vsini distributions of the magnetic to the non-magnetic HAeBe stars. Finally we have predicted the vsini of the non-magnetic, non-binary ("normal") stars in our sample when they reach the ZAMS, and compared them to various catalogues of the vsini of main-sequence stars. First, we observe that magnetic HAeBe stars are much slower rotators than normal stars, indicating that they have been more efficiently braked than the normal stars. In fact, the magnetic stars have already lost most of their angular momentum, despite their young ages (lower than 1 Myr for some of them). Secondly, our analysis suggests that the...

Alecian, E; Catala, C; Grunhut, J H; Landstreet, J D; Bhm, T; Folsom, C P; Marsden, S

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "braking anti-lock brakes" 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.


481

Magnetism and rotation in Herbig Ae/Be stars  

E-Print Network [OSTI]

Among the main sequence intermediate mass A and B stars, around 5% host large-scale organized magnetic fields. Most of these stars are very slow rotators compared to their non-magnetic counterparts, and show photospheric abundance anomalies. They are referred to as the Ap/Bp stars. One of the greatest challenges, today is to understand the origin of their magnetic field and their slow rotation. The favoured hypothesis is a fossil origin of the magnetic field, in which the magnetic fields of Ap/Bp stars are relics of those which existed in the parental molecular clouds during the formation. This implies that the magnetic field must survive all the initial phases of the stellar evolution and especially the pre-main sequence (PMS) phase. This is consistent with the general belief that magnetic braking occurs during the PMS phase, which sheds angular momentum and slows the rotation of these stars. In this context, we proceeded with a survey of a sample of around 50 PMS Herbig Ae/Be stars, using the new spectropol...

Alecian, E; Catala, C; Folsom, C; Grunhut, J; Donati, J -F; Petit, P; Bagnulo, S; Bhm, T; Bouret, J -C; Landstreet, J D

2007-01-01T23:59:59.000Z

482

The stellar wind cycles and planetary radio emission of the Tau Boo system  

E-Print Network [OSTI]

Tau Boo is an intriguing planet-host star that is believed to undergo magnetic cycles similar to the Sun, but with a duration that is about one order of magnitude smaller than that of the solar cycle. With the use of observationally derived surface magnetic field maps, we simulate the magnetic stellar wind of Tau Boo by means of three-dimensional MHD numerical simulations. As the properties of the stellar wind depend on the particular characteristics of the stellar magnetic field, we show that the wind varies during the observed epochs of the cycle. Although the mass loss-rates we find (~2.7e-12 Msun/yr) vary less than 3 per cent during the observed epochs of the cycle, our derived angular momentum loss-rates vary from 1.1 to 2.2e32erg. The spin-down times associated to magnetic braking range between 39 and 78Gyr. We also compute the emission measure from the (quiescent) closed corona and show that it remains approximately constant through these epochs at a value of ~10^{50.6} cm^{-3}. This suggests that a ma...

Vidotto, A A; Jardine, M; Donati, J F; Opher, M; Moutou, C; Catala, C; Gombosi, T I

2012-01-01T23:59:59.000Z

483

TEC as electric generator in an automobile catalytic converter  

SciTech Connect (OSTI)

Modern cars use more and more electric power due to more on-board electric systems, e.g., ABS brakes, active suspension systems, electric windows, chair adjustment systems and electronic engine control systems. One possible energy source for electricity generation is to use the waste heat from the car`s engine, which generally is as much as 80% of the total energy from the combustion of the gasoline. Maybe the best location to tap the excess heat is the Catalytic Converter (Cat) in the exhaust system or perhaps at the exhaust pipes close to the engine. The Cat must be kept within a certain temperature interval. Large amounts of heat are dissipated through the wall of the Cat. A Thermionic Energy Converter (TEC) in coaxial form could conveniently be located around the ceramic cartridge of the Cat. Since the TEC is a rather good heat insulator before it reaches its working temperature the Cat will reach working temperature faster, and the final temperature of it can be controlled better when encapsulated in a concentric TEC arrangement. It is also possible to regulate the temperature of the Cat and the TEC by controlling the electrical load of the TEC. The possible working temperatures of present and future Cats appear very suitable for the new low work function collector TEC, which has been demonstrated to work down to 470 K.

Svensson, R. [Chalmers Univ. of Technology, Goeteborg (Sweden); Holmlid, L. [Univ. of Goeteborg (Sweden). Dept. of Physical Chemistry

1996-12-31T23:59:59.000Z

484

Constraints on the Formation and Evolution of Circumstellar Disks in Rotating Magnetized Cloud Cores  

E-Print Network [OSTI]

We use magnetic collapse models to place some constraints on the formation and angular momentum evolution of circumstellar disks which are embedded in magnetized cloud cores. Previous models have shown that the early evolution of a magnetized cloud core is governed by ambipolar diffusion and magnetic braking, and that the core takes the form of a nonequilibrium flattened envelope which ultimately collapses dynamically to form a protostar. In this paper, we focus on the inner centrifugally-supported disk, which is formed only after a central protostar exists, and grows by dynamical accretion from the flattened envelope. We estimate a centrifugal radius for the collapse of mass shells within a rotating, magnetized cloud core. The centrifugal radius of the inner disk is related to its mass through the two important parameters characterizing the background medium: the background rotation rate $\\Omb$ and the background magnetic field strength $\\Bref$. We also revisit the issue of how rapidly mass is deposited onto the disk (the mass accretion rate) and use several recent models to comment upon the likely outcome in magnetized cores. Our model predicts that a significant centrifugal disk (much larger than a stellar radius) will be present in the very early (Class 0) stage of protostellar evolution. Additionally, we derive an upper limit for the disk radius as it evolves due to internal torques, under the assumption that the star-disk system conserves its mass and angular momentum even while most of the mass is transferred to a central star.

Shantanu Basu

1998-08-13T23:59:59.000Z

485

Evolution of magnetized, differentially rotating neutron stars: Simulations in full general relativity  

E-Print Network [OSTI]

We study the effects of magnetic fields on the evolution of differentially rotating neutron stars, which can form in stellar core collapse or binary neutron star coalescence. Magnetic braking and the magnetorotational instability (MRI) both redistribute angular momentum; the outcome of the evolution depends on the star's mass and spin. Simulations are carried out in axisymmetry using our recently developed codes which integrate the coupled Einstein-Maxwell-MHD equations. For initial data, we consider three categories of differentially rotating, equilibrium configurations, which we label normal, hypermassive and ultraspinning. Hypermassive stars have rest masses exceeding the mass limit for uniform rotation. Ultraspinning stars are not hypermassive, but have angular momentum exceeding the maximum for uniform rotation at the same rest mass. We show that a normal star will evolve to a uniformly rotating equilibrium configuration. An ultraspinning star evolves to an equilibrium state consisting of a nearly uniformly rotating central core, surrounded by a differentially rotating torus with constant angular velocity along magnetic field lines, so that differential rotation ceases to wind the magnetic field. In addition, the final state is stable against the MRI, although it has differential rotation. For a hypermassive neutron star, the MHD-driven angular momentum transport leads to catastrophic collapse of the core. The resulting rotating black hole is surrounded by a hot, massive, magnetized torus undergoing quasistationary accretion, and a magnetic field collimated along the spin axis--a promising candidate for the central engine of a short gamma-ray burst. (Abridged)

Matthew D. Duez; Yuk Tung Liu; Stuart L. Shapiro; Masaru Shibata; Branson C. Stephens

2006-05-12T23:59:59.000Z

486

Collisionless absorption, hot electron generation, and energy scaling in intense laser-target interaction  

E-Print Network [OSTI]

Among the various attempts to understand collisionless absorption of intense ultrashort laser pulses a variety of models has been invented to describe the laser beam target interaction. In terms of basic physics collisionless absorption is understood now as the interplay of the oscillating laser field with the space charge field produced in the plasma. A first approach to this idea is realized in Brunel's model the essence of which consists in the formation of an oscillating charge cloud in the vacuum in front of the target. The investigation of statistical ensembles of orbits shows that the absorption process is localized at the ion-vacuum interface and in the skin layer: Single electrons enter into resonance with the laser field thereby undergoing a phase shift which causes orbit crossing and braking of Brunel's laminar flow. This anharmonic resonance acts like an attractor for the electrons and leads to the formation of a Maxwellian tail in the electron energy spectrum. Most remarkable results of our inves...

Liseykina, T; Murakami, M

2014-01-01T23:59:59.000Z

487

Advanced Aerodynamic Devices to Improve the Performance, Economics, Handling, and Safety of Heavy Vehicles  

SciTech Connect (OSTI)

Research is being conducted at the Georgia Tech Research Institute (GTRI) to develop advanced aerodynamic devices to improve the performance, economics, stability, handling and safety of operation of Heavy Vehicles by using previously-developed and flight-tested pneumatic (blown) aircraft technology. Recent wind-tunnel investigations of a generic Heavy Vehicle model with blowing slots on both the leading and trailing edges of the trailer have been conducted under contract to the DOE Office of Heavy Vehicle Technologies. These experimental results show overall aerodynamic drag reductions on the Pneumatic Heavy Vehicle of 50% using only 1 psig blowing pressure in the plenums, and over 80% drag reductions if additional blowing air were available. Additionally, an increase in drag force for braking was confirmed by blowing different slots. Lift coefficient was increased for rolling resistance reduction by blowing only the top slot, while downforce was produced for traction increase by blowing only the bottom. Also, side force and yawing moment were generated on either side of the vehicle, and directional stability was restored by blowing the appropriate side slot. These experimental results and the predicted full-scale payoffs are presented in this paper, as is a discussion of additional applications to conventional commercial autos, buses, motor homes, and Sport Utility Vehicles.

Robert J. Englar

2001-05-14T23:59:59.000Z

488

Closed cycle MHD generator with nonuniform gas-plasma flow driving recombinated plasma clots  

SciTech Connect (OSTI)

A new concept of a closed cycle MHD generator without alkali seed has been suggested. The essence of it is the phenomenon of frozen conductivity for recombined plasma which appears for noble gas at T{sub e} > 4,000 K. At the inlet of the MHD channel in supersonic flow of noble gas (He or Ar) the plasma clots with electron density about 10{sup 15} cm{sup {minus}3} are formed by pulsed intense electron beam with energy about 300 keV. Gas flow drives these clots in a cross magnetic field along the MHD channel which has electrodes connected with the load by Faraday scheme. The gas flow pushes plasma layers and produces electric power at the expense of enthalpy extraction. The numerical simulation has shown that a supersonic gas flow, containing about 4 plasma layers in the MHD channel simultaneously, is braked without shock waves creation. This type of the MHD generator can provide more than 30% enthalpy extraction ratio and about 80% isentropic efficiency. The advantages of the new concept are the following: (a) possibility of working at higher pressure and lower temperature, (b) operation with alkali seed.

Slavin, V.S. [Krasnoyarsk State Technical Univ. (Russian Federation); Danilov, V.V.; Sokolov, V.S. [Krasnoyarsk State Univ. (Russian Federation)

1996-12-31T23:59:59.000Z

489

Nuclear-Powered Millisecond Pulsars and the Maximum Spin Frequency of Neutron Stars  

E-Print Network [OSTI]

Millisecond pulsars are neutron stars (NSs) that are thought to have been spun-up by mass accretion from a stellar companion. It is unknown whether there is a natural brake for this process, or if it continues until the centrifugal breakup limit is reached at submillisecond periods. Many NSs that are accreting from a companion exhibit thermonuclear X-ray bursts that last tens of seconds, caused by unstable nuclear burning on their surfaces. Millisecond brightness oscillations during bursts from ten NSs (as distinct from other rapid X-ray variability that is also observed) are thought to measure the stellar spin, but direct proof of a rotational origin has been lacking. Here, we report the detection of burst oscillations at the known spin frequency of an accreting millisecond pulsar, and we show that these oscillations always have the same rotational phase. This firmly establishes burst oscillations as nuclear-powered pulsations tracing the spin of accreting NSs, corroborating earlier evidence. The distribution of spin frequencies of the 11 nuclear-powered pulsars cuts off well below the breakup frequency for most NS models, supporting theoretical predictions that gravitational radiation losses can limit accretion torques in spinning up millisecond pulsars.

Deepto Chakrabarty; Edward H. Morgan; Michael P. Muno; Duncan K. Galloway; Rudy Wijnands; Michiel van der Klis; Craig B. Markwardt

2003-07-01T23:59:59.000Z

490

Extending the Constant Power Speed Range of the Brushless DC Motor through Dual Mode Inverter Control -- Part I: Theory and Simulation  

SciTech Connect (OSTI)

An inverter topology and control scheme has been developed that can drive low-inductance, surface-mounted permanent magnet motors over the wide constant power speed range required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC) [1]. The DMIC can drive either the Permanent Magnet Synchronous Machine (PMSM) with sinusoidal back emf, or the brushless dc machine (BDCM) with trapezoidal emf in the motoring and regenerative braking modes. In this paper we concentrate on the BDCM under high-speed motoring conditions. Simulation results show that if all motor and inverter loss mechanisms are neglected, the constant power speed range of the DMIC is infinite. The simulation results are supported by closed form expressions for peak and rms motor current and average power derived from analytical solution to the differential equations governing the DMIC/BDCM drive for the lossless case. The analytical solution shows that the range of motor inductance that can be accommodated by the DMIC is more than an order of magnitude such that the DMIC is compatible with both low- and high-inductance BDCMs. Finally, method is given for integrating the classical hysteresis band current control, used for motor control below base speed, with the phase advance of DMIC that is applied above base speed. The power versus speed performance of the DMIC is then simulated across the entire speed range.

Lawler, J.S.

2001-10-29T23:59:59.000Z

491

Development of a new feed channel spacer for reverse osmosis elements. Phase 2 final report, October 1, 1994--December 31, 1997  

SciTech Connect (OSTI)

During Phase 1, computer modeling techniques were used as the prime instrument of evaluation of designs for a new feed channel spacer to replace the 30 mil thick standard mesh (Vexar) spacer currently used in ROWPU [Reverse Osmosis Water Processing Unit] spiral-wound elements. A hemispherical peg model, based on a Bed of Nails concept developed in Phase 1, was selected for prototype production of spiral-wound elements for field testing. Evaluation in the See-Thru test cell to observe pressure drops through the spacer, feed mixing patterns and ease of cleaning fouled membrane samples showed considerable benefit over Vexar. This design would be suitable for production by roll embossing (or rotary punching) methods instead of expensive injection molding techniques. A 10{1/2} inch die set was fabricated to prove this concept using a 12 ton press brake. Due to a number of factors, however, the equipment did not work as anticipated and numerous modifications are currently in progress. This work will continue at no cost to the government until completed. A seawater test system has been constructed for field testing of various commercially available feed channel spacers for comparison with the Vexar spacer.

Milstead, C.E.; Riley, R.L.

1998-02-11T23:59:59.000Z

492

Effects of Canola Biodiesel on a DI Diesel Engine Performance and Emissions  

E-Print Network [OSTI]

Abstract- A direct injection (DI) diesel engine is tested with different biodiesel-diesel blends, such as B0 (neat diesel), B5 (i.e., 5 vol. % biodiesel and 95 vol. % diesel), B10 (10 vol. % biodiesel), B20 (20 vol. % biodiesel), B50 (50 vol. % biodiesel), and B100 (neat biodiesel) for performance and emissions under different load conditions. Engine performance is examined by measuring brake specific fuel consumption (bsfc) and fuel conversion efficiency (? f). The emission of carbon monoxide (CO), hydrocarbon (HC), nitric oxide (NO), nitrogen dioxide (NO 2), nitrogen oxides (NOx), carbon dioxide (CO 2) and others are measured. Biodiesel shows a significant CO and HC reduction compared to diesel under low load operation; under high load operation, however, CO with biodiesel is increased a little and HC emissions are very similar to that with diesel. On the other hand, under low load operation, NOx emission with biodiesel is significantly increased than diesel; however, under high load operation, there is almost no change in NOx emissions with biodiesel and diesel. Index Term- Canola biodiesel, diesel engine, engine performance, exhaust emissions.

Murari Mohon Roy; Majed Alawi; Wilson Wang

493

Effectiveness of Diesel Oxidation Catalyst in Reducing HC and CO Emissions from Reactivity Controlled Compression Ignition  

SciTech Connect (OSTI)

Reactivity Controlled Compression Ignition (RCCI) has been shown to allow for diesel-like or better brake thermal efficiency with significant reductions in nitrogen oxide (NOX) particulate matter (PM) emissions. Hydrocarbon (HC) and carbon monoxide (CO) emission levels, on the other hand, are similar to those of port fuel injected gasoline engines. The higher HC and CO emissions combined with the lower exhaust temperatures with RCCI operation present a challenge for current exhaust aftertreatments. The reduction of HC and CO emissions in a lean environment is typically achieved with an oxidation catalyst. In this work, several diesel oxidation catalysts (DOC) with different precious metal loadings were evaluated for effectiveness to control HC and CO emissions from RCCI combustion in a light-duty multi-cylinder engine operating on gasoline and diesel fuels. Each catalyst was evaluated in a steady-state engine operation with temperatures ranging from 160 to 260 C. A shift to a higher light-off temperature was observed during the RCCI operation. In addition to the steady-state experiments, the performances of the DOCs were evaluated during multi-mode engine operation by switching from diesel-like combustion at higher exhaust temperature and low HC/CO emissions to RCCI combustion at lower temperature and higher HC/CO emissions. High CO and HC emissions from RCCI generated an exotherm keeping the catalyst above the light-off temperature.

Prikhodko, Vitaly Y [ORNL; Curran, Scott [ORNL; Parks, II, James E [ORNL; Wagner, Robert M [ORNL

2013-01-01T23:59:59.000Z

494

User's guide to DIANE Version 2. 1: A microcomputer software package for modeling battery performance in electric vehicle applications  

SciTech Connect (OSTI)

DIANE is an interactive microcomputer software package for the analysis of battery performance in electric vehicle (EV) applications. The principal objective of this software package is to enable the prediction of EV performance on the basis of laboratory test data for batteries. The model provides a second-by-second simulation of battery voltage and current for any specified velocity/time or power/time profile. The capability of the battery is modeled by an algorithm that relates the battery voltage to the withdrawn current, taking into account the effect of battery depth-of-discharge (DOD). Because of the lack of test data and other constraints, the current version of DIANE deals only with vehicles using fresh'' batteries with or without regenerative braking. Deterioration of battery capability due to aging can presently be simulated with user-input parameters accounting for an increase of effective internal resistance and/or a decrease of cell no-load voltage. DIANE 2.1 is written in FORTRAN language for use on IBM-compatible microcomputers. 7 refs.

Marr, W.W.; Walsh, W.J. (Argonne National Lab., IL (USA). Energy Systems Div.); Symons, P.C. (Electrochemical Engineering Consultants, Inc., Morgan Hill, CA (USA))

1990-06-01T23:59:59.000Z

495

An evolutionary model for SAX J1808.4 -- 3658  

E-Print Network [OSTI]

An evolutionary scenario to explain the transient nature and short total duration of the X-ray burst of SAX J1808.4 -- 3658 is proposed. An optical companion of the neutron star (a ``turn-off'' Main - Sequence star) fills its Roche lobe at the orbital period ($P_{orb}$) $\\sim$ 19 hours. During the initial high mass--transfer phase when the neutron star is a persistent X-ray source, the neutron star is spun up to a millisecond period. Due to its chemical composition gradient, the secondary does not become fully convective when its mass decreases below 0.3 $\\msun$, hence a magnetic braking remains an effective mechanism to remove orbital angular momentum and the system evolves with Roche - lobe overflow towards a short orbital period. Near an orbital period of two hours the mass transfer rate becomes so small ($\\sim$ $10^{-11}\\msun$/yr) that the system can not continue to be observed as a persistent X-ray source. During further Roche - lobe filling evolution deep mixing allows the surface of secondary to become more and more helium rich. Since the accreted matter is helium rich, it is easy to explain observed short total duration of the burst . This evolutionary picture suggest that radio emission can be observed only at shorter wavelength's. Our model predicts a faster orbital period decay than expected if the orbital evolution is driven only by gravitational wave radiation.

Ene Ergma; Jelena Antipova

1999-02-03T23:59:59.000Z

496

Health-hazard evaluation report HETA 87-392-2099, Loral Systems Group, Akron, Ohio  

SciTech Connect (OSTI)

In response to a request from the International Union, United Automobile, Aerospace and Agricultural Implement Workers of America (UAW), an evaluation was undertaken of possible health hazards at the Loral Systems Group (SIC-3728) located in Akron, Ohio. Concern was voiced about possible asbestos (1332214) exposure. The company produces wheels and brakes for civilian and military aircraft and currently employs about 1560 persons at the Akron facility. At the time of the study there were about 2300 living retirees. The precise number who had worked in one of the four areas of particular interest was unkown. Of the 166 persons found eligible for inclusion in the health hazard evaluation (15 or more years of potential asbestos exposure in at least one of the four identified programs and still residing in Ohio), 129 participated in a medical evaluation consisting of a chest x-ray, pulmonary function test, and completion of a questionnaire to detail medical and prior work histories. Abnormal pulmonary function results were noted in 39 of these individuals of whom 30 demonstrated an obstructive pattern, three a restrictive pattern, and six both an obstructive and restrictive component. Nonsmoking participants were more likely to report chronic cough, chronic phlegm, and chronic bronchitis than comparisons.

Not Available

1991-02-01T23:59:59.000Z

497

Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles (Presentation)  

SciTech Connect (OSTI)

This presentation discusses a method of accounting for realistic levels of driver aggression to higher-level vehicle studies, including the impact of variation in real-world driving characteristics (acceleration and speed) on vehicle energy consumption and different powertrains (e.g., conventionally powered vehicles versus electrified drive vehicles [xEVs]). Aggression variation between drivers can increase fuel consumption by more than 50% or decrease it by more than 20% from average. The normalized fuel consumption deviation from average as a function of population percentile was found to be largely insensitive to powertrain. However, the traits of ideal driving behavior are a function of powertrain. In conventional vehicles, kinetic losses dominate rolling resistance and aerodynamic losses. In xEVs with regenerative braking, rolling resistance and aerodynamic losses dominate. The relation of fuel consumption predicted from real-world drive data to that predicted by the industry-standard HWFET, UDDS, LA92, and US06 drive cycles was not consistent across powertrains, and varied broadly from the mean, median, and mode of real-world driving. A drive cycle synthesized by NREL's DRIVE tool accurately and consistently reproduces average real-world for multiple powertrains within 1%, and can be used to calculate the fuel consumption effects of varying levels of driver aggression.

Neubauer, J.; Wood, E.

2013-05-01T23:59:59.000Z

498

Investigating potential efficiency improvement for light-duty transportation applications through simulation of an organic Rankine cycle for waste-heat recovery  

SciTech Connect (OSTI)

Modern diesel engines used in light-duty transportation applications have peak brake thermal efficiencies in the range of 40-42% for high-load operation with substantially lower efficiencies at realistic road-load conditions. Thermodynamic energy and exergy analysis reveals that the largest losses from these engines are due to heat loss and combustion irreversibility. Substantial improvement in overall engine efficiency requires reducing or recovering these losses. Unfortunately, much of the heat transfer either occurs at relatively low temperatures resulting in large entropy generation (such as in the air-charge cooler), is transferred to low-exergy flow streams (such as the oil and engine coolant), or is radiated or convected directly to the environment. While there are significant opportunities for recovery from the exhaust and EGR cooler for heavy-duty applications, the potential benefits of such a strategy for light-duty applications are unknown due to transient operation, low-load operation at typical driving conditions, and the added mass of the system. We have developed an organic Rankine cycle model using GT-Suite to investigate the potential for efficiency improvement through waste-heat recovery from the exhaust and EGR cooler of a light-duty diesel engine. Results from steady-state and drive-cycle simulations are presented, and we discuss strategies to address operational difficulties associated with transient drive cycles and competition between waste-heat recovery systems, turbochargers, aftertreatment devices, and other systems for the limited thermal resources.

Edwards, Kevin Dean [ORNL; Wagner, Robert M [ORNL

2010-01-01T23:59:59.000Z

499

Gearbox Reliability Collaborative Phase 3 Gearbox 2 Test Plan  

SciTech Connect (OSTI)

Gearboxes in wind turbines have not been achieving their expected design life even though they commonly meet or exceed the design criteria specified in current design standards. One of the basic premises of the National Renewable Energy Laboratory (NREL) Gearbox Reliability Collaborative (GRC) is that the low gearbox reliability results from the absence of critical elements in the design process or insufficient design tools. Key goals of the GRC are to improve design approaches and analysis tools and to recommend practices and test methods resulting in improved design standards for wind turbine gearboxes that lower the cost of energy (COE) through improved reliability. The GRC uses a combined gearbox testing, modeling and analysis approach, along with a database of information from gearbox failures collected from overhauls and investigation of gearbox condition monitoring techniques to improve wind turbine operations and maintenance practices. Testing of Gearbox 2 (GB2) using the two-speed turbine controller that has been used in prior testing. This test series will investigate non-torque loads, high-speed shaft misalignment, and reproduction of field conditions in the dynamometer. This test series will also include vibration testing using an eddy-current brake on the gearbox's high speed shaft.

Link, H.; Keller, J.; Guo, Y.; McNiff, B.

2013-04-01T23:59:59.000Z

500

Hydromechanical transmission with compound planetary assembly  

DOE Patents [OSTI]

A power transmission having three distinct ranges: (1) hydrostatic, (2) simple power-split hydromechanical, and (3) compound power-split hydromechanical. A single compound planetary assembly has two sun gears, two ring gears, and a single carrier with two sets of elongated planet gears. The two sun gears may be identical in size, and the two ring gears may be identical in size. A speed-varying module in driving relationship to the first sun gear is clutchable, in turn, to (1) the input shaft and (2) the second sun gear. The speed-varying means may comprise a pair of hydraulic units hydraulically interconnected so that one serves as a pump while the other serves as a motor and vice versa, one of the units having a variable stroke and being the one clutchable to either the input shaft or to the second sun gear. The other unit, which may have a fixed stroke, is connected in driving relation to the first sun gear. A brake grounds the carrier in the first range and in reverse and causes drive to be delivered to the output shaft through the first ring gear in a hydrostatic mode, the first ring gear being rigidly connected to the output shaft. The input shaft is also clutchable to the second ring gear of the compound planetary assembly.

Orshansky, Jr., deceased, Elias (late of San Francisco, CA); Weseloh, William E. (San Diego, CA)

1980-01-01T23:59:59.000Z