针对双轴驱动纯电动汽车的前后电机驱动转矩分配，基于电机的MAP特性，建立以双电机利用效率最大化为目标的优化模型，获得双驱动电动汽车不同转速与不同转矩需求下的双电机最优转矩分配模型。针对双轴驱动电动汽车，设计了普通、动力与经济三种驾驶驱动模型，并基于优化模型制定了三种驱动模式的转矩分配优化策略。最后以轻量化纯电动中巴为对象，建立了Carsim/Simulink联合仿真模型，分别以0-60km/h加速验证动力性能以及NEDC工况的经济性验证效率。仿真结果表明，在三种驱动模式下，本文的策略能小幅度缩短电动中巴的加速时间，提升NEDC工况续航里程分别达2.2%、4.56%与6.6%，为双轴驱动电动汽车提供了双电机转矩优化分配的方法。

Aiming at the driving torque distribution between front and rear motor of two-axle drive electric vehicles, an optimization model is established based on the motor’s MAP characteristics, in order to maximize the utilization efficiency of dual-motor, then an optimal torque distribution model of dual- motor is obtained under the demand of different speed and torque. For two-axle drive electric vehicles, three driving modes of normal, power and economy are designed. And based on this optimization model, three dual- motor’s torque distribution strategies of three driving modes are worked out. Finally, a united simulation model of Carsim/Simulink is built for a lightweight electric minibus. And 0-60km/h acceleration time is used to verify the dynamic performance, and the economic performance of NEDC is used to verify efficiency. The results of simulation show that, the strategy studied in this paper can not only shorten the acceleration time of electric minibus by a small margin, but also extend the range of NEDC, which has increased 2.2%, 4.56% and 6.6% respectively under three driving modes. It provides an optimization method of dual- motor’s torque distribution for two-axle drive electric vehicles.