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A Continuously Variable Transmission for Automotive Fuel Economy
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English
Abstract
The use of a high efficiency, continuously variable transmission (CVT) with a wide ratio range is required in order to operate an automotive engine at minimum brake specific fuel consumption (bsfc). Such operation will increase fuel economy from 20-40% over conventional practice.
This paper describes a 12:1 ratio range CVT, and shows a simplified control system capable of allowing a vehicle to operate with the engine at or very near minimum bsfc under all demand power conditions for optimized fuel economy.
Also described is the effect such a transmission has on vehicle performance and raises the possibility of reducing engine size to maintain normal performance, and further increase fuel economy.
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Authors
Topic
Citation
Kraus, J., Kraus, C., and Gres, M., "A Continuously Variable Transmission for Automotive Fuel Economy," SAE Technical Paper 751180, 1975, https://doi.org/10.4271/751180.Also In
References
- Davis D. F. Richardson R. A. “Engine-Transmission Relationship for Higher Efficiency.” SAE Summer Meeting Atlantic City, New Jersey June 6 1952 SAE Transactions 61 1953 81 96
- Request for Proposal No. CI-74-0183 Environmental Protection Agency Washington, D. C. March 26 1974
- Chrysler Corporation First Quarterly Progress Report “Baseline Gas Turbine Development Program.” Report to Environmental Protection Agency under Contract No. 68-01-0459 January 31 1973 Chrysler Corporation, Engineering and Research Office Detroit, Michigan
- Doidge J. R. Cline C. W. Green L. E. “Hydraulic Control Systems.” SAE 5 “Design Practices - Passenger Car Automatic Transmissions.”
- Winchell F. J. Route W. D. “Ratio Changing the Passenger Car Automatic Transmission.” SAE 5 “Design Practices - Passenger Car Automatic Transmissions.”
- Kraus J. H. “Traction Drive Shows Automotive Promise.” Machine Design 45 25 October 18 1973 20 24