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Clutch Energy — A Criteria of Thermal Failure
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English
Abstract
A method is presented for computing the energy dissipation rate in a wet clutch that is part of a vehicle transmission system. This method takes into account the transients in the vehicle prime mover, the hydraulic torque converter, the powershift transmission, and the vehicle load.
The clutch energy rate is then used as an input to attempt to predict the interface temperature at the clutch surface.
The solution of the Fourier-Poisson unsteady state heat conduction equation is carried out using a finite difference method. The calculation of this interface temperature, called temperature index, is then correlated to actual clutch failure through experimental laboratory clutch testing. Results show a temperature index level above which failure is likely to occur regardless of the variation of clutch parameters.
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Authors
Citation
Dundore, M. and Schneider, R., "Clutch Energy — A Criteria of Thermal Failure," SAE Technical Paper 680582, 1968, https://doi.org/10.4271/680582.Also In
References
- Ludwig L. P. “Engagement Characteristics of Wet Type Clutches.” SAE Transactions 67 1959 391 396
- Ishihara T. Emori R. I. “Torque Converter as a Vibration Damper and its Transient Characteristics.” SAE Transactions 75 1967 501 512
- Jania Z. J. “Friction Clutch Transmissions.” Machine Design December 1958
- Jacob Max “Heat Transfer.” I and II New York John Wiley and Sons, Inc. 1949-1957
- Giedt W. H. “Principles of Engineering Heat Transfer.” Princeton, N. J. Van Nostrand 1957
- Benedict Robert P. “Transient Heat Flow.” Electro-Technology December 1961
- McAdams William H. “Heat Transmission.” New York McGraw-Hill 1942