关键词: 双电机动力系统, 动力参数, 动力性, 经济性

Abstract: Since the the dynamic performance and economic performance of pure electric vehicles were affected by parameter matching of powertrain,for a new dual-motor power train,a method of power train parameters optimization based on energy consumption was proposed.The parameters were preliminary matched based on New European Driving Cycle(NEDC).A multi-objective optimization model was established based on mode shift and power split between two motors,which took power and speed of two motors,and gear ratio as the variables,specific energy consumption and 0-100km/h acceleration time as the optimization objectives.The model was solved by multi-objective particle swarm optimization algorithm,and the results showed that the optimized parameters of the power train could improve the dynamic and economic performance of a dual-motor electric vehicle.

Key words: dual-motor powertrain, power train parameters, dynamic performance, economic performance