1. School of Automotive Engineering, Chongqing Univ., Chongqing 400044, PR China.
2. Professor, School of Automotive Engineering, Chongqing Univ., Chongqing 400044, PR China (corresponding author).
3. Master of Engineering, School of Automotive Engineering, Chongqing Univ., Chongqing 400044, PR China.
4. Senior Engineer, Changan Automobile Company Limited, Airport Ave., Chongqing 400044, PR China.