Dual-Motor Hybrid Dedicated Transmission Based on P1/P3 Architecture

Abstract

In order to meet increasingly stringent fuel consumption and emission requirements, in the field of powertrains, there is an increasing demand for the development and application of hybrid dedicated transmissions, especially dual-motor hybrid dedicated transmissions. During the application of the dual-motor hybrid dedicated transmission, the layout space and cost have become factors that cannot be ignored. How to find an optimal solution among multiple influencing factors such as performance, space and cost determines the application prospect and market promotion of the dual-motor hybrid dedicated transmission. Based on the above ideas, the Schaeffler Engineering team designed and developed a dual-motor hybrid dedicated transmission with P1/P3 architecture. The dual motor architecture provides the flexible drive modes, and the innovative one-way clutch structure design achieve the targets of low cost and simple structure; besides, the innovative one-way clutch structure design effectively controls the axial length, which optimizes the structure and reduces the cost of the hybrid dedicated transmission, so it can be convenient suitable for three-cylinder and four-cylinder engines. At the same time, a suitable hybrid control strategy was applied to optimize fuel consumption and to ensure smooth drive and reliability of components.