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Analysis of the Various Factors Affecting Drag Torque in Multiple-Plate Wet Clutches
Technical Paper
2003-01-1973
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
Experiments were conducted to study the effects of design factors of clutch packs on drag torque. From the test results, the design factors with a large effect were facing area and wave height. At high rotational speeds, automatic transmission fluid (ATF) flow rates and the number of grooves also had a significant effect. At low rotational speeds, since drag torque increased linearly with increasing speed, the results were compared to calculated values using theoretical equations based on Newton's law of viscosity. Furthermore, it was confirmed through visualization experiments of ATF flow on the rotating facing surface that the ATF completely covered the surface at low rotational speeds and that air mixed with the ATF at high rotational speeds.
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Authors
Citation
Kitabayashi, H., Li, C., and Hiraki, H., "Analysis of the Various Factors Affecting Drag Torque in Multiple-Plate Wet Clutches," SAE Technical Paper 2003-01-1973, 2003, https://doi.org/10.4271/2003-01-1973.Also In
References
- Fish, Robert L. “Using the SAE#2 Machine to Evaluate Wet Clutch Drag Losses” SAE Paper No. 910803 1991
- Kato, Y. Murasugi, T. Hirano, H. Shibayama, T. “Fuel Economy Improvement through Tribological Analysis of the Wet Clutches and Brakes of an Automatic Transmission” JSAE Paper No. 9305436 1993