1. Ph.D. Candidate, State Key Laboratory of Engines, Tianjin Univ., Tianjin 300072, China; Engine Engineer, GAC Automotive Research & Development Center, Jinshan Rd. 668, Panyu District, Guangzhou, Guangdong 511434, China.
2. Engine Engineer, GAC Automotive Research & Development Center, Jinshan Rd. 668, Panyu District, Guangzhou, Guangdong 511434, China.
3. Professor, State Key Laboratory of Engines, Tianjin Univ., Tianjin 300072, China.
4. Engine Engineer, GAC Automotive Research & Development Center, Jinshan Rd. 668, Panyu District, Guangzhou, Guangdong 511434, China (corresponding author).