1. School of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
2. Product Planning & Automotive New Technology Research Institude, BYD Automobile Industry Company Limited, Shenzhen 518118, China
3. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
4. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, China