电控喷射单一燃料CNG轿车发动机的性能试验  

Performance Test of CNG Car Engine featuring Electronically-controlled Injection

作　　者：张群[1,2] 王天友[1] 吴喜庆[1,2] 郭云杰[1] 王刚德[1] 付晓光[1] 李琦[2] 刘书亮[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室 [2]天津一汽夏利汽车股份有限公司

出　　处：《汽车技术》2010年第5期51-55,共5页Automobile Technology

基　　金：国家高技术研究发展计划(863)资助项目(2008AA11A154)

摘　　要：研究了过量空气系数及点火时刻对某电控喷射单一燃料压缩天然气发动机的动力性、经济性和排放性能的影响。试验结果表明,在整个转速范围内,该发动机的有效燃料消耗率比汽油机平均降低了约17.7%,有效热效率平均提高了9.68%。在此基础上得到了在变过量空气系数和点火时刻下,该天然气发动机的燃烧、排放规律。The effect of excessive air coefficient and ignition timing on dynamic performance, fuel economy and emission performance of an electronically controlled injection dedicated CNG car engine was studied. The test results show that the engine＇s BSFC is about 17.7% lower and effective thermal efficiency is 9.68% higher as compared to gasoline engine. Based on this, the law of combustion and emission of CNG engine is obtained under variable excessive air coefficient and ignition timing.

关 键 词：压缩天然气发动机 过量空气系数 点火时刻 性能试验 

分 类 号：U473.24[机械工程—车辆工程]