Study on Adaptive Method of Filling for Wet Dual Clutch*

A vehicle model equipped with wet dual clutch transmission based on Matlab/Simulink is established and the filling influence on the vehicle's gear shifting quality is simulated by the model. The simulation results show the friction work increases when the wet clutch is under fill and the jerk increases when the clutch is over-fill. So a two-parameter fuzzy control method is proposed to adjust the filling oil pressure and the built model is used to verify the effectiveness of the algorithm. Furthermore, rapid prototype simulation verification is carried out based on dSPACE hardware. The simulation results show that the adaptive control can reduce the jerk and friction work of the vehicle shifting process, and improve the shifting quality and driving comfort of the vehicle.