DESIGN STUDY OF TOROIDAL TRACTION CVT FOR ELECTRIC VEHICLES

The development, evaluation, and optimization of a preliminary design concept for a continuously variable transmission (CVT) to couple the high-speed output shaft of an energy storage flywheel to the drive train of an electric vehicle is discussed. An existing computer simulation program was modified and used to compare the performance of five CVT design configurations. Based on this analysis, a dual-cavity full-toroidal drive with regenerative gearing is selected for the CVT design configuration. Three areas are identified that will require some technological development: the ratio control system, the traction fluid properities, and evaluation of the traction contact performance. Finally, the suitability of the selected CVT design concept for alternate electric and hybrid vehicle applications and alternate vehicle sizes and maximum output torques is determined. In all cases the toroidal traction drive design concept is applicable to the vehicle system. The regenerative gearing could be eliminated in the electric powered vehicle because of the reduced ratio range requirements. In other cases the CVT with regenerative gearing would meet the design requirements after appropriate adjustments in size and reduction gearing ratio.

  • Corporate Authors:

    AiResearch Manufacturing Company

    2525 West 190th Street
    Torrance, CA  United States  90509

    National Aeronautics and Space Administration

    600 Independence Avenue, SW
    Washington, DC  United States  20546
  • Authors:
    • Raynard, A E
    • Kraus, Jakub
    • Bell, D D
  • Publication Date: 1980-1

Media Info

  • Pagination: 161 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00318648
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NASA-CR-159803 Final Rpt., DOE/NASA/0117-80/1
  • Contract Numbers: DEN3-117, EC-77-A-31-1044
  • Files: TRIS
  • Created Date: Oct 27 1981 12:00AM