Research on coordinated control of mode transition in dual-drive hybrid system

Abstract

Due to the high economy and drivability performance objectives, the dual-drive hybrid system which has two motors is developed. In the diverse conditions, the drive modes which are on account of the engine status, the requested driver torque and power, C0 status are presented. The unique challenge of the dual-drive hybrid system is drive modes transition. Specifically, the path transition from the electric mode control to parallel mode control in the acceleration and from parallel mode to electric mode in the brake acceleration. The drive mode control process is divided into five control phases. Finally, tests are successfully performed in the real vehicles to prove that the drivability performance are greatly improved and the innovative control strategy is also demonstrated.