1. School of Mechanical Engineering, University of Science & Technology Beijing, 30 Xueyuan Road, Haidian, Beijing 100083, China
2. FAW-Volkswagen Automobile Co. Ltd., Chengdu Branch 177 Chenglong Road, Longquanyi, Chengdu 610199, China
3. China North Vehicle Research Institute, No. 4, Huaishuling, Fengtai, Beijing 100072, China