轻度混合动力汽车运行模式控制

Operating mode control research of mild hybrid electric vehicle

基于实际工程应用的目的,分析了轻度混合动力汽车不同运行模式间的状态迁移及相应模式下的控制策略,通过加速踏板和电子节气门开度变化,详细讨论了行驶模式下的控制策略。在Matlab/Simulink中建立了整车运行模式的状态逻辑模型,在给定的ECE15+EUDC循环工况下进行了仿真分析。最后在转鼓试验台上对改装前后的传统车和轻度混合动力车进行了排放和油耗对比试验。仿真及试验结果表明:在给定的循环工况下,发动机和ISG电机的输出转矩能满足工况需求;改装后的轻度混合动力车相比传统车而言,HC排放降低73.3%、CO排放降低35%,且远低于欧Ⅲ排放限值,百公里油耗约降低15.1%,节油效果明显。

Based on the purpose of the practical engineering applications,the state transition between operating modes of HEV and the corresponding control strategy of the modes were analyzed.Through the opening variation of the accelerator pedal and the electronic throttle,the control strategy of HEV in driving mode was discussed in detail.The state logic model of the HEV＇s operating modes was built in Matlab/Simulink environment.And the performances of the HEV were simulated in the ECE15＋EUDC driving cycle operating mode.Finally the emission and fuel consumption contrast experiments between the traditional vehicle and HEV were carried out on the roll test station.The simulation and test results show that the output torque of the engine and ISG motor can meet with the driving cycle requirements.HC emission decreases by 73.3%,and CO emission decreases by 35% of HEV,compared to that of the traditional vehicle,and the total emissions are much less than Europe Ⅲ emission limits.At the same time,100-kilometer fuel consumption approximately decreases by 15.1% and the fuel saving result is obvious.