关于高EGR率下的柴油机燃烧及排放的研究  

Study on Combustion and Exhaust Emissions of Diesel Engines Operating with High EGR Rates

作　　者：刘省波[1] 李岳林[1] 李薛[1] 张楚书[1] 张宁[2] 

机构地区：[1]长沙理工大学汽机学院,湖南长沙410076 [2]长沙电力职业技术学院

出　　处：《小型内燃机与摩托车》2010年第4期25-28,共4页Small Internal Combustion Engine and Motorcycle

基　　金：湖南省自然科学基金资助项目(06JJ20045);湖南省教育厅重点资助科研项目(07A004)

摘　　要：通过试验研究了柴油机在高EGR率下,喷油定时、喷油压力对其燃烧及排放的影响。结果表明：不论是提前还是延迟喷油定时,增加着火延迟,都会减少碳烟排放量,而且喷油定时的提前有保持热效率和防止发动机失火等优点。在所有的喷油压力下,混合气中氧含量达到9%-10%时,可以实现无烟燃烧。This research investigates the influences of the injection timing and injection pressure on the combustion and exhaust emissions in a diesel engine operating with high EGR rate.Increases in ignition delays with both advancing and retarding the injection timing reduce the smoke emissions,but advancing the injection timing has the advantages of maintaining the thermal efficiency and preventing misfiring.Smokeless combustion is realized with an intake oxygen content of 9-10% regardless of the injection pressure.

关 键 词：柴油机 EGR 喷油定时 喷油压力 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]