Schematics, efficiency curves, and a brief discussion are employed to describe 20 possible transmission concepts for a passenger car powered by a single-shaft gas turbine engine. This type of engine requires a continuously-variable-ratio transmission to permit engine operation at efficient peak cycle temperatures for all power levels, while operating over a limited speed range of approximately 50% speed at idle to 100% speed at full power. Possible transmission concepts are analyzed, including currently available and new gearboxes and various speed variators (fixed and variable stator torque converters, hydromechanical systems, traction drives, slip clutches, and belt drives). It is concluded that differential split power traction drive concepts provide the best overall efficiency across the transmission speed ratio range. Substituting a variable stator torque converter for the traction drive provides high peak efficiency and permits eventual substitution of a developed traction unit. Hydromechanical concepts (Tri-Mode and Orshansky), are excellent in efficiency but may be noisy and costly. Two-shaft or free-power turbine arrangements are conventional, complex, and costly, and may have temperature limitations.

  • Supplemental Notes:
    • Also published in HS-028 833 (SAE-SP-465), "Advanced Gas Turbine Systems for Automobiles," Warrendale, Pennsylvania, 1980, p 7-30. Presented at SAE Congress and Exposition, Detroit, 25-29 February 1980.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Carriere, D L
  • Publication Date: 1980

Media Info

  • Features: References;
  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00391486
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 800100, HS-028 835
  • Files: HSL, USDOT
  • Created Date: Dec 30 1984 12:00AM