瞬态工况下EGR率测量方法的研究  

Dissuasion Energy Conversation Based EGR Rate Measurement of EGR Rate for Transient Operations

作　　者：朱昌吉[1] 刘忠长[1] 许允[1] 

机构地区：[1]吉林大学汽车工程学院,吉林长春130022

出　　处：《内燃机学报》2006年第3期276-279,共4页Transactions of Csice

基　　金：国家重点基础研究发展规划项目(2001CB209205);国家自然科学基金项目(503760190)

摘　　要：稳态工况EGR率的测量通常采用测量CO2浓度的方法,在瞬态工况下CO2分析仪存在响应滞后的问题,提出利用热力学能量守恒原理,通过测量EGR混合前后的气体温度,计算出基于质量比率的EGR率,并对测量精度进行了分析,与目前国内外通用的测量CO2的浓度来计算EGR的方法进行了比较。温度法测量的EGR率基本上可以满足瞬态下EGR率的测量要求。CO2 concentration is usually used to measure EGR rate under steady operation conditions. The responding delay of CO2 analyzer will become the problem in measuring EGR rate under transient operation conditions. A novel EGR rate real-time measuring technique based on energy conversation is proposed in this paper. Through measuring the temperature of intake air and the mixture of intake air and EGR gases, EGR rate can be obtained. The results showed that the precision and responding characteristics of the measuring technique could meet the demands of engine transient operations.

关 键 词：过渡工况 EGR EGR率瞬态测量 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]