增压直喷汽油机超级爆震现象与初步试验  

Super Knock and Preliminary Investigation of Its Influences on Turbocharged GDI Engine

作　　者：张志福[1,2] 舒歌群[1] 梁兴雨[1] 刘国庆[2] 杨万里[2] 王志[3] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]奇瑞汽车股份有限公司发动机工程研究院,安徽芜湖241009 [3]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《内燃机学报》2011年第5期422-426,共5页Transactions of Csice

基　　金：内燃机燃烧学国家重点实验室开放课题基金资助项目(K2010-04);国家高科技发展计划"863"资助项目(2006AA110106)

摘　　要：在增压缸内直喷汽油机上发现了与普通爆震不同的异常燃烧模式——超级爆震,阐述了超级爆震的特征,对比分析了超级爆震与常规爆震和正常燃烧的基本不同.发生超级爆震时,最大爆压达到正常燃烧的2倍以上,并且通过推迟点火角不能抑制超级爆震的发生.在此基础上,初步研究了冷却水温度、进气温度、进气相位和过量空气系数等对超级爆震的影响.试验结果表明:降低冷却水温度,优化进气相位,可以一定程度抑制超级爆震;降低进气温度、改变过量空气系数,对超级爆震没有明显的影响.Super knock was found on turbocharged GDI engine, it is regarded as different pattern to the normal knock. Differences of super knock, normal knock and normal combustion were compared. Maximum combustion pressure of super knock is double to that normal combustion. Super knock can not be eliminated by retarding spark advance angle. The effects of cooling water temperature, intake tempera- ture, intake valve timing and excess air ratio on super knock were investigated. Results show that low cooling water temperature and optimized intake valve timing lead to low intensity of super knock. Variation in intake temperature and excess air ratio has no obvious effect on super knock.

关 键 词：增压 缸内直喷 超级爆震 预燃 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]