[Yuan, Quan] Tsinghua Univ, Dept Automot Engn, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China.^[Zhao, Junwei] Beihang Univ, Sch Transportat Sci & Engn, Beijing 100191, Peoples R China.^[Zou, Tiefang] Changsha Univ Sci & Technol, Sch Automobile & Mech Engn, Changsha 410114, Peoples R China.