增压缸内直喷汽油机抑制预燃试验  

Investigation on Pre-Ignition Suppression of Turbo-Charged GDI Engine

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

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,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：《燃烧科学与技术》2012年第2期156-160,共5页Journal of Combustion Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA110106);天津大学内燃机燃烧学国家重点实验室开放基金资助项目(K2010-04)

摘　　要：预燃是增压缸内直喷汽油机上与普通爆震不同的异常燃烧模式,通过阐述预燃的特征,对比分析了预燃与常规爆震和正常燃烧的基本不同.通过初步分析预燃产生机理,指出了可能抑制预燃的主要手段,试验研究了冷却水温度、点火角、进气相位等对预燃的影响.试验结果表明,降低冷却水温度,优化进气相位,可以一定程度抑制预燃;提前点火角,发生轻微常规爆震,但未出现预燃.Pre-ignition was found on boosted gasoline direct injection （GDI） engine. Phenomena and characteristic of pre-ignition were introduced. Differences of pre-ignition, normal knocking and normal combustion were compared. By analyzing possible root cause for pre-ignition, major suppression approaches were carried out on test-bench. The effects of cooling water temperature, spark advance and intake valve timing on pre-ignition were investigated. The results show that lower cooling water temperature and optimized intake valve timing lead to lower intensity of pre-ignition. Advancing spark advance leads to slightly normal knocking instead of pre-ignition.

关 键 词：增压 缸内直喷 预燃 爆震 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]