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International Journal of Automotive Technology > Volume 19(3); 2018 > Article
International Journal of Automotive Technology 2018;19(3): 473-488.
doi: https://doi.org/10.1007/s12239-018-0046-8
DYNAMICS ANALYSIS OF TORSIONAL VIBRATION INDUCED BY CLUTCH AND GEAR SET IN AUTOMATIC TRANSMISSION
Meng Li, Michael Khonsari, Ruzhou Yang
Louisiana State University
ABSTRACT
The torsional vibration generated during clutch engagement directly affects the shifting quality of automatic transmissions, where the noise source stems from both the clutch and the gear set. To predict the dynamical response and driveline oscillation, a comprehensive mathematical model of the vehicle powertrain equipped with automatic transmission is developed with consideration of nonlinearities in the clutch and the planetary gear set. For the clutch, the dynamics of stickslip is described for the transition between the slipping to locked states. The gear backlash model is used to analyze the rattle noise of the planetary gear set. Based on extensive powertrain simulations for the clutch engagement process, the magnitude of vibration propagation in the driveline are predicted to identify the primary factors of noise generation.
Key Words: Powertrain, Transmission, Planetary gear backlash, Clutch engagement
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