WEIGHT PROPAGATION AND EQUIVALENT HORSEPOWER FOR ALTERNATE-ENGINED CARS
The authors discuss a vehicle performance simulation program designed to develop performance variables in alternatives to the Otto-cycle engine equivalent performance being the principal criterion. The original engine system is (figuratively) removed from the baseline vehicle and the alternate power system, with horsepower chosen to give the same power-to-weight ratio, is "installed" . This is achieved by iteratively adjusting the engine horsepower and calculating the vehicle weight, including the weight propagation caused by the engine weight changes. The performance of the resulting vehicle is then computed with the vehicle simulation program and compared to that of the baseline vehicle. The power-to-weight ratio is adjusted, with vehicle weight increments calculated at each horsepower value, and the simulation computations repeated until equivalent performance is obtained. Seven alternate heat-engine types were ivestigated in this study including the uniform charge (UC) Otto, alternate UC Otto, stratified charge Otto, turbocharged diesel, single shaft Brayton, free turbine Brayton, Stirling and Rankine (steam).
- Preprint for meeting held February 27-March 3, 1978.
Warrendale, PA United States 15096
- Klose, G
- KURTZ, D W
- Publication Date: 1978
- Pagination: 16 p.
- TRT Terms: Air engines; Diesel engines; Energy; Fuel conservation; Heat cycle; Horsepower; Iterative methods; Mathematical methods; Performance; Rankine engines; Simulation; Stirling engines; Stratified charge engines; Superchargers; Turbochargers; Vehicle performance; Vehicle power plants
- Old TRIS Terms: Automobile engines; Brayton system; Supercharging; Turbocharging; Weight volume relationships
- Subject Areas: Energy; Highways; Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00180085
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: SAE 780348 Preprint
- Files: TRIS
- Created Date: Oct 12 1978 12:00AM