1. School of automotive and traffic engineering, Jiangsu university, Zhenjiang, Jiangsu, China
2. Vehicle measurement, control and safety key laboratory of Sichuan province, Chengdu, Sichuan, China
3. Provincial engineering research center for new energy vehicle intelligent control and simulation test technology of Sichuan, Xihua university, Chengdu, Sichuan, China
4. State key laboratory of engines (Tianjin university), Tianjin university, Tianjin, China