混合动力轿车的控制策略与建模

Modeling and Development of the Control Strategy for a Hybrid Car

采用理论模型和试验数据相结合的建模方法,在系统仿真软件MATLAB/Simulink环境中建立了EQ7200HEV混合动力轿车样车A的仿真模型,该整车模型的控制策略采用了逻辑门限与瞬时优化相结合的算法,既可以满足实时性的要求,又能同时兼顾电池的充放电损失和制动回收电能.仿真结果与实验数据比较表明,文中提出的控制策略能有效地控制混合动力系统在高效区工作,显著地提高了汽车的燃油经济性.

A computer simulation model for EQ7200HEV hybrid car A was developed in the system simulation software MATLAB/Simulink environment. The bench test results for key components of the hybrid powertrain are treated as reliable reference in the modeling. Based upon the simple logic threshold approach in corporation of a stand-by optimization algorithm, a control strategy for the hybrid car A was proposed and also implemented in the real hybrid car. Simulation results were presented for behaviors of the engine, motor and battery, which demonstrate that the control strategy is effective. The present control strategy is applied in the real car A and it is shown from the monitoring and testing that the control functions are practical.