DESIGN STUDIES OF CONTINUOUSLY VARIABLE TRANSMISSIONS FOR ELECTRIC VEHICLES

Preliminary design studies were performed on four continuously variable transmission (CVT) concepts for use in advanced electric vehicles. A 1700 kg (3750 lb) vehicle with an energy storage flywheel was specified. Requirements of the CVTs were a maximum torque of 450 N-m (330 lb-ft), a maximum output power of 75 kW (100 hp), and a flywheel speed range of 28,000 to 14,000 rpm. The design of each concept was carried through the design layout stage. Power losses were determined over the ranges of operating conditions, and transmission effficiencies were calculated. The design studies were performed under contracts to NASA for DOE by Garrett/AiResearch (toroidal traction CVT), Battelle Columbus Labs (steel V-belt CVT), Kumm Industries (flat belt variable diameter pulley CVT), and Bales-McCoin Tractionmatic (cone-roller traction CVT). (ERA citation 06:009378)

• Supplemental Notes:
  • Society of Automotive Engineers international engineering congress and exposition, Detroit, MI, USA, 23 Feb 1981.
• Corporate Authors:

  Department of the Navy

  The Pentagon
  Washington, DC  United States  20350

  Department of Energy

  1000 Independence Avenue, SW
  Washington, DC  United States  20585
• Authors:
  • Parker, R J
  • Loewenthal, S H
  • Fischer, G K
• Publication Date: 1981

Media Info

• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Design; Dissipation; Economic efficiency; Electric vehicles; Energy storage systems; Flywheels; Hybrid automobiles; Hybrid vehicles; Manual transmissions
• Uncontrolled Terms: Efficiency
• Old TRIS Terms: Flywheel-powered vehicles
• Subject Areas: Design; Economics; Energy; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00336767
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NASA-TM-81642, CONF-810206-2
• Contract Numbers: AI01-77CS51044
• Files: TRIS
• Created Date: Jun 12 1981 12:00AM