Abstract: An electromechanically coupled powertrain configuration is developed for a parallel hybrid electric vehicle to enhance its fuel economy and dynamics. First, the configuration of the hybrid electric vehicle is analyzed to determine that the selected drive mode of the powertrain is P2 parallel hybrid, and the electromechanical coupling method of coaxial torque coupling is adopted. Then, the engine and motor are selected by combining the relevant data of the prototype vehicle, and the theoretical calculation method is used to match the parameters of the electromechanical coupling system. In order to obtain the optimal matching scheme, the integrated optimization of the designed electromechanical coupling system is carried out with the orthogonal experimental design method, and a set of optimal matching values of electromechanical coupling parameters are obtained. Finally, a multi-objective optimization of the driveline parameters is implemented to obtain the optimized transmission ratios.

Key words: Electromechanical coupling systems; Integrated development; Parameter matching; Orthogonal design of experiments

摘要： 针对并联混动汽车设计一套机电耦合构型动力系统，以提高其动力性和燃油经济性。 首先对混动汽车的构型进行分析，确定所选择的动力系统驱动模式为 P2 并联混合动力，并采 用同轴式转矩耦合的机电耦合方式。然后结合原型车的相关数据，对发动机和电机进行选型， 并采用基于理论计算的方法为机电耦合系统进行参数匹配。为获得最优匹配方案，结合正交 试验设计方法对所设计的机电耦合系统进行集成寻优，得到一组最优机电耦合参数匹配数值。 最后，对传动系参数进行了多目标优化，得到了优化后的变速器传动比。

关键词: 机电耦合系统；集成开发；参数匹配；正交试验设计