This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Analysis of Automatic Transmission Clutch-Plate Temperatures
Annotation ability available
Sector:
Language:
English
Abstract
Automatic transmission clutch failures and rapid oxidation of the transmission fluid have sometimes been attributed to high temperatures in the clutch pack. For the purpose of estimating these temperatures, an analysis was made of the clutch system, and a solution was developed from the partial differential equations of heat conduction with appropriate boundary conditions. The solution thus obtained was verified experimentally.
There were several important conclusions to this study. The maximum temperature rise occurs somewhat earlier than the end of the lockup time. The interface temperature rise increases as the lockup time decreases for a fixed amount of energy input. The ratio of heat flux entering the reaction plate to that entering the composite plate is not constant, as has been assumed by others. The heat absorbed by the fluid outside the clutch pack is negligible during the short lockup time. Temperature rises for some typical cases are computed.
Recommended Content
Authors
Citation
Tataiah, K., "An Analysis of Automatic Transmission Clutch-Plate Temperatures," SAE Technical Paper 720287, 1972, https://doi.org/10.4271/720287.Also In
References
- Haviland M. L. et al “Surface Temperatures and Friction in Lubricated Clutches.” Paper 642B SAE Automotive Engineering Congress Detroit January 1963
- Newcomb T. P. “Transient Temperatures in Brake Drums and Linings.” Paper 7, Proceedings Automobile Div. Inst. Mech. Engrs. 1958-1959
- Newcomb T. P. “Flow of Heat in a Composite Solid.” Brit. J. Applied Physics 10 1959 204 206
- Newcomb T. P. “Temperatures Reached in Friction Clutch Transmissions.” J. Mech. Engrg. Sciences 2 4 1960 273 287