Parameter optimization of a dual mass flywheel considering clutch engagement stability during the starting of a DCT vehicle

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (14) : 162-169.

GUO Zheng1,QIN Datong1,LI Shengwei2,LIU Yonggang1

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Abstract

In the starting process, the fluctuation of engine output torque leads to unstable clutch engagement and affects the ride comfort of the vehicle powertrain. Dual mass flywheel (DMF) can reduce the influence of engine torque fluctuation on clutch and vehicle powertrain. Aiming at the problem that clutch engagement instability affects vehicle ride comfort during the starting process, the influence of DMF stiffness, damping and inertia ratio of primary and secondary flywheel of DMF on clutch engagement stability of DCT vehicle during the starting process was studied by taking Dual clutch automatic transmission (DCT) vehicle as the research object. A multi-objective optimization model with clutch stick slip ratio and vehicle jerk as the objective function was established. The model was optimized by genetic algorithm. The optimal parameter combination of DMF which improves the clutch engagement stability and significantly reduces the vehicle impact was obtained.

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GUO Zheng1,QIN Datong1,LI Shengwei2,LIU Yonggang1. Parameter optimization of a dual mass flywheel considering clutch engagement stability during the starting of a DCT vehicle[J]. Journal of Vibration and Shock, 2023, 42(14): 162-169

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