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Qualitative and Quantitative Influence of a Fully Electronically Controlled CVT on Fuel Economy and Vehicle Performance
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English
Abstract
The trend towards increased individualism concerning the car's response to drivers' preferences is evident. In combination with the desire for high performance plus severe legal requirements on fuel consumption and emission levels this sets the powertrain engineer an almost impossible task. A Continuously Variable Transmission with full electronic control offers an opportunity to meet this challenge due to its infinite number of ratios within a wide ratio span.
Based on the experience with 600000 CVT-cars in the field equipped with the VDT-belt a 250 Nm-CVT has been developed. This up-range CVT model features electronic controls for ratio and line pressure control, a torque convertor with lock-up and flow controlled pump. The transmission has been fitted to a 3, 3 I Chrysler Voyager. Fuel consumption measurements show a 17 % decrease in the ECE-cycle compared with the 4-speed automatic in one and the same car while improving the acceleration performance in the 0−100 km/h (0 − 62 mph) run by 1 second.
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Citation
Hendriks, E., "Qualitative and Quantitative Influence of a Fully Electronically Controlled CVT on Fuel Economy and Vehicle Performance," SAE Technical Paper 930668, 1993, https://doi.org/10.4271/930668.Also In
References
- Hendriks E. ter Heegde P. van Prooijen T. Aspects of a metal pushing V-belt for Automotive CVT-application; Passenger car Meeting and Exposition Dearborn Michigan October 31 November 3 1988 paper no. 881734
- van Vuuren S. Efficiency Improvements in CVT-systems; Sitev ‘90 Conference Geneva 1990
- Gielis W.T.M. Electronic control of continuously variable transmission and its extension to engine transmission management Second International Conference on new Developments in Powertrain and Chassis Engineering Strasbourg 14-16 June 1989 133 138
- Höhn B.R. Anforderungen an Zukunftigen PKW-Getriebe; Getriebe in Fahrzeugen heute und morgen; VDI-berichte 878 1991 1 20