Study on dynamic performance in engagement process of wet clutch

A multimode dynamic model of a wet clutch in engagement process was developed and its correctness was verified by the experiment. From the simulation, the following conclusions were extracted: in oil feeding process of the wet clutch, the pressure in the hydraulic cylinder was influenced by the stiffness and original length of return spring, piston stroke, the area of hydraulic cylinder and etc., and was independent of the initial buffering pressure that was set by the digital proportional relief valve; when the piston came to the end, the pressure rose immediately, the impact frictional force brought impact torque in gear shifting process; the higher the initial buffering pressure, the bigger the impact torque. The slipping time and ultimate frictional torque were decided by the initial buffering pressure, the final buffering pressure and the process from the initial buffering pressure to the final buffering pressure. When the initial buffering pressure decreased, the slipping time, ultimate frictional torque, maximal dynamic torque factor and frictional work increased, but the first impact in shifting process was decreased.