Abuse Torque Load Simulation and Design of Differential Mechanism in Hybrid Electric Vehicle

Abstract

This study established the dynamic math model and the physical simulation model of a hybrid transmission system, and investigated the abuse torque load characteristics of the Differential Mechanism. It is found that, when the transmission system contains a large moment of inertia of components, the abuse torque load of the Differential Mechanism is 23% greater than that of traditional vehicles, which may lead to Differential Mechanism failure. By monitoring the change of wheel angular acceleration and controlling the output torque of the driving motor, the peak abuse torque load can be reduced by 35%. At the same time, the spline interface design of the Differential Mechanism and Half Shafts were improved to increase the impact resistance from the source. At last, the Differential Mechanism was subjected to an impact fatigue test with positive results.