Four power systems were studied: an advanced spark ignition engine; a battery-powered electric motor; a diesel engine; and a diesel-electric hybrid. These systems were studied via computer simulations of vehicle operation over a specific driving cycle which yielded energy consumption estimates. Two types of vehicles were considered. One was a subcompact passenger car designed primarily for urban/suburban use but capable of cruising at 100 km/h and mixing safely with suburban traffic. The second type of vehicle was a full-size car designed for comfortable interstate-highway operation as well as local driving. The electrics were based on the assumed availability of an advanced battery with an energy density about four times greater than that of present-day lead-acid traction batteries. The same type of advanced battery, reconfigured to provide maximum power, is assumed to be available for the diesel-electric hybrid. However, in the hybrid, the battery only supplements the power available from a small diesel engine during peak power demand periods (the battery is recharged from the engine through a motor/alternator). It is concluded that, for subcompacts, the all-electric propulsion system could provide an attractive vehicle for local transportation. However, the diesel and the diesel-electric hybrid may provide an alternative to the spark-ignition engine: they would be almost as inexpensive to operate as the electric, yet would not be confined by range limitations. For full-size cars, the diesel and diesel-electric hybrid's fuel savings make them economically attractive: for example, the diesel-electric's projected fuel savings amount to more than over an advanced spark ignition engine.

Media Info

  • Pagination: p. 39-41
  • Serial:
    • Automotive Engineering
    • Volume: 86
    • Issue Number: 5
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00183256
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 12 1981 12:00AM