A control strategy of torque-split between the shafts for four-wheel-independent-drive EV

The control strategy of torque-split between the shafts for electric vehicle has significant effects on the vehicle power performance. A dynamical model for studying the electric vehicle was established, taking account of not only the position of the accelerator pedal but also the wheel slip ratio. In this paper, a simulation platform of control system of torque-split between the shafts of this vehicle was developed, and the simulated acceleration process was present. An effective torque-split control strategy was proposed based on the comprehensive analysis of both mechanical split in terms of accelerator pedal position and dynamic split according to the wheel slip rate The results indicate that the control strategy could make full use of the adhesion to the ground conditions, meeting the requirements of electric vehicle´s acceleration process, and improving the vehicle rapidity of reaction and the power performance.