预燃室式LPG发动机的试验研究  

Experimental Study on a LPG Engine with Pre-chamber

作　　者：周俊杰[1] 魏鹏[1] 肖广飞[1] 李锋[1] 

机构地区：[1]大连理工大学,大连116024

出　　处：《内燃机工程》2003年第6期4-6,共3页Chinese Internal Combustion Engine Engineering

基　　金：辽宁省科学技术基金资助项目(9910400301)

摘　　要：在不改变原柴油机缸盖结构的前提下,将小型直喷式柴油机改造成预燃室式火花点火LPG发动机。在此基础上,对预燃室喷嘴直径进行了优化试验研究。试验结果表明,这种预燃烧系统作为主室的点火能量放大器和扰动源,可提高燃烧速度,缩短燃烧持续期,达到了稀气快燃的目的,可获得较好的动力性和改善排放,尤其怠速工况下NO排放非常理想。为CNG或LPG发动机的改造、理论研究和应用提供借鉴。A small-scale D.I.diesel engine is modified into a S.I.LPG engine without changing the structure of the original cylinder head. Experimental studies on the diameter of spray nozzle of the pre-chamber have been optimized. Being the ignition energy amplifier and perturbation source in the main room, this kind of pre-combustion system can raise the combustion rate, shorten the combustion duration and get a better power and emission performance especially for the emission of NO on the idling condition. Therefore it is valuable for the modification, theoretical research and application of the CNG or LPG engine.

关 键 词：内燃机 预燃室 排放 火花点火 LPG发动机 柴油机 试验研究 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]