预混合压燃式天然气发动机燃烧性能的初步试验研究  

Experimental Investigation on Combustion Characteristics of Premixed Charge Compression Ignition CNG Engine

作　　者：张惠明[1] 张德福[1] 张振明[1] 郑清平[1] 

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

出　　处：《燃烧科学与技术》2005年第5期389-394,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金(50276041);国家重点基础研究发展规划(973)资助项目(2001CB209201).

摘　　要：对影响单一燃料天然气发动机压缩着火运转范围和排放特性的相关因素进行了试验研究.设计开发的新型燃烧系统采用球形涡流室式燃烧室配以电控天然气复合供气系统,通过台架试验,研究了不同的天然气供气方式、涡流室结构参数、进气空气加热温度及陶瓷电热塞温度对着火燃烧及排放的影响.试验结果表明,天然气低压进气道供气方式有利于天然气的压缩着火;在一定范围内适当增加涡流室与主室通道尺寸,有利于缓解预混合压燃的敲缸现象;辅助加热温度受到敲缸与部分燃烧现象的制约,应当精确控制.The factors which affect the operation range and emission characteristics are explored with experiments on a premixed charge compression ignition CNG （ compressed nature gas） engine. The designed combustion system consists of divided chambers and electrical-controlled compound CNG supplement system. The effect of CNG supplement method divided chamber geometry, and the heating temperature on combustion and emission are studied. The results show that CNG supplement with low pressure injection in intake port is favorable for compression ignition; moderately increasing the passage size between auxiliary and main chambers can help relieve knock in premixed charge compression ignition operation ; heating temperature for intake air should be regulated precisely with the limitation of knock and partly combustion.

关 键 词：发动机 天然气 预混合压燃 低散热 热面点火 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]