The control method of ISG motors intervention double-clutch automatic transmission gearshift

The present invention relates to a kind of control method of ISG motors intervention double-clutch automatic transmission gearshift, under pure engine operating condition, ISG motors are made to intervene DCT shift processes comprehensively, described control method is comprised the following steps that：1) in the torque phase of DCT shift processes, ISG motors are allowed to be operated in upshift assistant mode or downshift power generation mode；2) in the inertia phase of DCT shift processes, ISG motor switch operating states are made rapidly, and enter upshift power generation mode or downshift assistant mode, allowing ISG motors to provide makes the synchronizing torque of engine and target clutch driven plate Fast synchronization；3) in torque switch step, ISG motors are gradually backed out mode of operation, and motor torque is gradually switched to drive demand torque.Compared with prior art, the advantages of present invention can effectively solve the torque coordination control problem between double clutch in DCT gearshift procedures, engine and ISG motors.