NEAR-TERM HYBRID VEHICLE PROGRAM, PHASE 1. APPENDIX B: DESIGN TRADE-OFF STUDIES

The relative attractiveness of various hybrid/electric power train configurations and electrical and mechanical drive-line components was studied. The initial screening was concerned primarily with total vehicle weight and economic factors and identified the hybrid power train combinations which warranted detailed evaluation over various driving cycles. This was done using a second-by-second vehicle simulation program which permitted the calculations of fuel economy, electricity usage, and emissions as a function of distance traveled in urban and highway driving. Power train arrangement possibilities were examined in terms of their effect on vehicle handling, safety, serviceability, and passenger comfort. A dc electric drive system utilizing a separately excited motor with field control and battery switching was selected for the near term hybrid vehicle. Hybrid vehicle simulations showed that for the first 30 mi (the electric range of the vehicle) in urban driving, the fuel economy was 80 mpg using a gasoline engine and 100 mpg using a diesel engine. In urban driving the hybrid would save about 75% of the fuel used by the conventional vehicle and in combined urban/highway driving the fuel saving is about 50%.

• Supplemental Notes:
  • Prepared for JPL.
• Corporate Authors:

  General Electric

  Marine Turbine & Gear Engineer, 1100 Western Ave
  Lynn, MA  United States  01910

  National Aeronautics and Space Administration

  600 Independence Avenue, SW
  Washington, DC  United States  20546
• Publication Date: 1979-10-8

Media Info

• Pagination: 204 p.

Subject/Index Terms

• TRT Terms: Alternatives analysis; Comfort; Diesel engines; Diesel fuels; Economic factors; Electric batteries; Electric power transmission; Electric vehicles; Engines; Fuel consumption; Gasoline; Gasoline engines; Handling characteristics; Highways; Hybrid automobiles; Hybrid vehicles; Internal combustion engines; Manual transmissions; Simulation; Transmissions; Urban areas; Vehicle design; Vehicle power plants; Vehicle safety; Weight
• Uncontrolled Terms: Handling
• Old TRIS Terms: Engine design; Mechanical drives; Propulsion system configurations; Vehicular safety; Weight mass
• Subject Areas: Design; Economics; Energy; Highways; Vehicles and Equipment; I96: Vehicle Operating Costs;

Filing Info

• Accession Number: 00318658
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NASA-CR-163227 Final Rpt., SRD79-134/3-APP-B-V1
• Contract Numbers: JPL-955190
• Files: TRIS
• Created Date: Oct 27 1981 12:00AM