Optimal torque control strategy of electric transmission driver based on AMT during gear shift

The electric transmission driver (ETD) integrates the transmission and permanent magnet synchronous motor into a compositive new type hybrid power unit assembly, which can perform shift, generate electricity, regenerative braking and drive function. The ETD not only integrates the transmission and motor into a compositive unit, makes the hybrid power system become smaller and can be used in different types of vehicles, but also can satisfy the requirement of hybrid power system integrative control. Two kinds of input torque optimal control strategies of ETD based on AMT (automatic mechanical transmission) under different shift condition were discussed and validated based on road test. It is found the gear shift quality, riding comfort and driving smoothness of HEV equipped with ETD are obviously much better than the bus equipped with conventional AMT according to the input torque control strategies from the experiment data results.