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Title: Automotive Stirling engine: Mod II design report

Abstract

The design of an automotive Stirling engine that achieves the superior fuel economy potential of the Stirling cycle is described. As the culmination of a 9-yr development program, this engine, designated the Mod II, also nullifies arguments that Stirling engines are heavy, expensive, unreliable, and demonstrate poor performance. Installed in a General Motors 1985 Chevrolet Celebrity car, this engine has a predicted combined fuel economy on unleaded gasoline of 17.5 km/L (41 mi/gal) - a value 50% above the current vehicle fleet average. The Mod II Stirling engine is a four-cylinder V-drive design with a single crankshaft. The engine is also equipped with all the controls and auxiliaries necessary for automotive operation. 35 figs.

Authors:
Publication Date:
Research Org.:
Mechanical Technology, Inc., Latham, NY (USA)
OSTI Identifier:
5896999
Report Number(s):
DOE/NASA-0032-28; NASA-CR-175106
ON: DE88003236
DOE Contract Number:
AI01-85CE50112
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; STIRLING ENGINES; PERFORMANCE TESTING; RESEARCH PROGRAMS; AUTOMOBILES; DESIGN; PROGRESS REPORT; ROAD TESTS; DOCUMENT TYPES; ENGINES; HEAT ENGINES; TESTING; VEHICLES; 330201* - External Combustion Engines- Stirling Cycle

Citation Formats

Nightingale, N.P. Automotive Stirling engine: Mod II design report. United States: N. p., 1986. Web.
Nightingale, N.P. Automotive Stirling engine: Mod II design report. United States.
Nightingale, N.P. Wed . "Automotive Stirling engine: Mod II design report". United States. doi:.
@article{osti_5896999,
title = {Automotive Stirling engine: Mod II design report},
author = {Nightingale, N.P.},
abstractNote = {The design of an automotive Stirling engine that achieves the superior fuel economy potential of the Stirling cycle is described. As the culmination of a 9-yr development program, this engine, designated the Mod II, also nullifies arguments that Stirling engines are heavy, expensive, unreliable, and demonstrate poor performance. Installed in a General Motors 1985 Chevrolet Celebrity car, this engine has a predicted combined fuel economy on unleaded gasoline of 17.5 km/L (41 mi/gal) - a value 50% above the current vehicle fleet average. The Mod II Stirling engine is a four-cylinder V-drive design with a single crankshaft. The engine is also equipped with all the controls and auxiliaries necessary for automotive operation. 35 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1986},
month = {Wed Oct 01 00:00:00 EDT 1986}
}

Technical Report:
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  • Volume No. 2 of the Automotive Stirling Engine Mod I Design Review Report contains descriptions of the operating principles, performance requirements and design details of the auxiliaries and control systems for the MOD I Stirling engine system. These components and sub-systems have the following main functions: provide the required fuel and air flows for a well controlled combustion process, generating heat to the Stirling cycle; provide a driver acceptable method for controlling the power output of the engine; provide adequate lubrication and cooling water circulation; generate the electric energy required for engine and vehicle operation; provide a driver acceptable methodmore » for starting, stopping and monitoring the engine; and provide a guard system, that protects the engine at component or system malfunction.« less
  • This report constitutes the required Design Review Report. It is a compilation of all of the unrestricted (non-protectable) information presented/discussed at the May 22-23, 1980 ASE Mode I Design Review held at NASA-LeRC. This Design Review Meeting was an update to the preliminary ASE Mod I Design Assessment Meeting held at NASA-LeRC on January 16-17, 1980. As the result of the January review, NASA authorized MTI to proceed with the procurement/fabrication of certain long lead time parts.
  • This volume, No. 3, of the Automotive Stirling Engine Mod 1 Design Review Report contains a preliminary parts list and detailed drawings of equipment for the basic Stirling engine and for the following systems: vehicular Stirling Engine System; external heat system; hot and cold engine systems; engine drive; controls and auxiliaries; and vehicle integration. (LCL)
  • The Mod II Stirling engine represents the culmination of activity in the Automotive Stirling Engine (ASE) development program. Incorporating technologies developed throughout the program, the Mod II is a kinematic, single-crankshaft, four-cycle Stirling V engine with an annular regenerator and cooler surrounding each double-acting piston. Its design is based on a unified, one-piece, cast-iron block incorporating crankcase, gas ducts, control lines, and waterjackets. The Mod II also embodies a new piston design, dependent balance scheme, and roller bearings in the crankshaft/connecting rod system. The Mod II engine is projected to meet ASE program goals of a 30% improvement in fuelmore » consumption compared to the spark-ignition, internal combustion (IC) engine; 1985 emission standards established by the EPA; the ability to be packaged in a current automobile; and a cost competitive with current gasoline and diesel engines.« less
  • An early task under the contract requires the contractor to prepare a series of conceptual Stirling engine system designs intended to meet the final program objectives, and to submit the initial conceptual designs, supporting analyses and recommendations to the NASA Project Manager for review and approval. The recommended Stirling engine concept should be the one which has the greatest chance of successfully meeting the final program objectives, within the capabilities, schedule and budget of the Program. The report summarizes the studies that were made, the methodology that was used and the results which support the concluded recommendation of a: Fourmore » cylinder, double acting, and square U design, with external regenerators. Optimization of this design concept resulted in a calculated fuel economy of 36.3 mpg for a 3200 pound vehicle, compared to the program goal of 30.0 mpg., and acceleration time of 13.1 seconds compared to the program goal of 15.0 seconds. The engine will meet or exceed the program emission goals of HC < 0.41 gram/mile, CO < 3.4 gram/mile, and NO/sub x/ < 0.4 gram/mile.« less