The twin-axle and real-time parallel-series hybrid electric driving system

In order to avoid those disadvantages of the present parallel-series hybrid electric driving system, a novel driving system named Twin-axle and real-time parallel-series system (TRPS) is designed in this paper. By using two wheel-side clutches and two motors in the left and the right rear wheel, the rear electric axle is designed. The transmission is replaced with a pair of gear in the front mechanical axle. Because there is none of differential in the rear electric axle, a novel electronic differential is designed by using logic threshold theory. An exposition has been made upon the structure and the control tactics of this driving system. And another exposition has been made upon the principle of the electronic differential. The method of designing is also expounded in detail. In the end of this paper, a simulation is made which is based on Matlab/Simulink/ Stateflow. Simulation results show that the vehicle can make a turn when only the rear electric axle work. So TRPS can be realized.