1. State Key Laboratory of Engines, Tianjin University, Tianjin, China
2. Technology Center, Dongfeng Motor Corporation, Wuhan, China
3. Department of Mechanical and Aerospace Engineering, University of California, Davis, CA, USA
4. China Automotive Technology & Research Center Co, Ltd, Tianjin, China
5. Internal Combustion Engine Research Institute, Tianjin University, Tianjin, China
6. Weichai Power Co. Ltd, Weifang, China