关键词: 异型双电驱桥；分布式电驱桥；集中式电驱桥；扭矩分配；效率最优

Abstract: Aiming at the heterogeneous dual e-drive axle system composed of a distributed e-drive axle and a centralized e-drive axle, this paper proposes an inter-axle torque distribution control method based on instantaneous system efficiency optimization. The method first determines the system's maximum speed and peak driving force boundaries, constructs a comprehensive efficiency storage matrix. Then traverses all working conditions through a main speed loop and a driving force sub-loop. Then within the sub-loop, the driving force demand for each axle is calculated based on a preset wheel-edge force distribution ratio. Within their peak capability ranges, motor efficiencies are obtained by querying motor efficiency MAP, and the overall system efficiency is computed. Finally, the optimal system efficiency under each speed–total driving force operating point is screened and stored, along with its corresponding wheel-edge force distribution ratio, axle-specific wheel-edge forces, motor speeds, motor torques, and efficiencies. This method provides a theoretical basis for efficient cooperative control of heterogeneous dual e-drive axles.

Key words: heterogeneous dual e-drive axle; distributed e-drive axle; centralized e-drive axle; torque distribution; efficiency optimization