To whom Correspondence should be addressed. E-mail: zhangxin@ bitu. edu. cn Zhang Xin, born in 1959. She received her Ph. D degree in Power and Control Engineering Department of Beijing JiaoTong University in 2000. She also received her B.S. and M.S. degrees from Zhejiang University and Xi' An JiaoTong University in 1982 and 1986 respectively. Her research interests include the clean energy vehicles, combustion for gas fueled engines.