稀薄燃烧在TJ376QE二气门汽油机上的实现  

Realization of Lean Combustion in the TJ376QE 2-Valve SI Engine

作　　者：刘德新[1] 刘书亮[1] 王莉[2] 肖浩栋[1] 曹诚[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 [2]天津大学电气与自动化工程学院,天津300072

出　　处：《燃烧科学与技术》2003年第3期267-273,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金重点资助项目(59936130);国家教委博士点基金资助项目(1999005629).

摘　　要：对二气门结构的TJ376QE汽油机进气系统进行了改造,提高了涡流和滚流比.强化空气运动的结果有利于组织燃料在缸内的浓度分布,从而为在二气门汽油机上实现稀薄燃烧打下基础;在原发动机的气道内电控燃油喷射系统的基础上,采用了二次燃油喷射技术.通过对二次喷油时刻和喷油量的分别调节,在缸内形成精细分层的混合气即所谓准均质混合气,从而优化了油耗和排放指标,成功地在二气门汽油机上实现了稀薄燃烧.The intake system of a 2Valve TJ376QE gasoline engine was modified and its intake swirl and tumble motions were intensified. The results of stronger air motions are helpful to organize air and fuel mixture strength distribution and consequently to realize lean mixture combustion in the 2valve gasoline engines. The previous port electronic fuel injection system was modified and the technique of twice electronic fuel injection (TEFI) was employed. Through regulations of the two injection timings and proportions, an adequate air and fuel charge stratification was produced,we call it quasihomogenous mixture, the fuel consumption and exhaust emissions were optimized and the lean burn was successfully realized in a mass produced 2valve SI engine.

关 键 词：稀薄燃烧 滚流和涡流 二次喷油 准均质混合气 二气门汽油机 

分 类 号：TK411.25[动力工程及工程热物理—动力机械及工程]