1. School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, China
2. Guangxi Automobile Group Co., Ltd, Liuzhou, China
3. Liuzhou Wuling Automobile Industry Co., Ltd, Liuzhou, China
4. Institute of the New Energy and Energy-saving & Emission-reduction, Guangxi University of Science and Technology, Liuzhou, China