柴油机瞬态工况下微粒排放特性及影响因素  

Particulate Emission Characteristics and Its Influencing Factors under Transient Operating Condition of a Diesel Engine

作　　者：王忠恕[1] 刘忠长[1] 郭永田 王永红 

机构地区：[1]吉林大学汽车工程学院 [2]一汽大连柴油机厂

出　　处：《农业机械学报》2004年第6期19-21,25,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(项目编号:59976011);国家"973"重点基础研究发展计划资助项目(项目编号:2001CB209205);吉林省科技发展计划资助项目(项目编号:20040512)

摘　　要：利用瞬态微粒测量系统 ,对增压中冷柴油机瞬态工况下微粒的排放特性进行了研究 ,结果表明 ,瞬态工况下微粒的排放量高于稳态工况 ,且随转矩变化率的增加微粒排放量明显增加 ,在低转速时更为明显。由于瞬态工况下进气量的增加滞后于燃油的增加 ,使得燃烧质量恶化 ;燃烧室内的温度相对于燃油喷射的滞后 ,也导致了瞬态工况下的微粒排放量的增加。Particulate emission characteristics of a turbo-charged and mid-cooling diesel engine under transient operating conditions were studied by a transient measurement system. The results showed that PM emission under transient operating condition was higher than that under static operating condition and would increase with the increment of torque changing rate, which was even more obvious under low speed conditions. As the increase of air flowrate was slower than that of fuel under transient operating conditions, the combustion quality would be getting worse. A delay of the combustion chamber temperature to the fuel injection would also lead to an increase of PM emission.

关 键 词：柴油机 瞬态工况 测量系统 微粒排放 燃烧室 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]