Wet clutches that handle the gearshift in automotive transmission undergo severe thermal stresses due to the occurrence of large temperature gradients during engagement. To accurately design wet clutches, better models to simulate the engagement process are needed. A finite element model for simulating wet clutch engagement is presented. The total friction coefficient was used to describe the different lubrication regimes that a wet clutch engagement undergoes. The model also includes provision for drive torque that realistically simulates the engine torque of a car. The results of the simulations are successfully verified by comparison with laboratory experiments on a test-rig specifically designed to accomodate the drive torque, covering a wide range of physical engagements. Excellent agreement between experiment and simulations is obtained in terms of both the dynamics of the engagement and the thermal characteristics. The results are indicative of the utility of the model as a useful engineering tool.
Thermal and dynamic characterization of wet clutch engagement with provision for drive torque
Transactions of the ASME, Journal of Tribology ; 123 , 2 ; 313-323
2001
11 Seiten, 11 Bilder, 7 Tabellen, 26 Quellen
Article (Journal)
English
Engagement behavior of a paper-based wet clutch part 1: influence of drive torque
Automotive engineering | 1999
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