The study of Plug-In Hybrid Electric Vehicle power management strategy simulation

The paper is to describe one developing Plug-In Hybrid Electric Vehicle (HEV). By analyzing the power train coupling configuration and targeted functions, a compound power management strategy has been proposed, which combines electric machine-dominated and engine-dominated strategy. According to the SOC of cells and the state of car, the running is separated into charge-depletion (CD) mode and charge-sustaining (CS) mode. The implementation of this control strategy includes three computation hierarchies which are Driving Mode Interpreter (DMI), Mode Transfer Cell (MTC) and Energy Management Implementer (EMI). To evaluate the control strategy and to optimize important parameters, vehiclepsilas driving mode and power management strategy mode are structured to make corresponding simulation studies, in virtue of the two software platforms of AVL Cruise and Simulink/Stateflow. Preliminary simulation results show the implementation of the control strategy to achieve smooth control mode-switching can realize a reasonable distribution of torques of engine and machine, and meet driving performance requirements.