气门正时对增压式汽油HCCI发动机NO_x和CO排放影响的初步研究  

Study on Influence of Valve Timing on NOx and CO Emission for Boosted Gasoline HCCI

作　　者：祁俊荣[1] 钟绍华[1] 

机构地区：[1]武汉理工大学汽车工程学院

出　　处：《天津汽车》2007年第2期13-15,44,共4页Tianjin AUTO

摘　　要：HCCI燃烧是一种新的发动机燃烧技术。文章研究了在不同的进气门和排气门最大开启点下,NOx和CO排放随气门正时变化的影响。结果表明,当排气门正时提前很多且增压压力和过量空气系数在增大时,NOx排放最低,而CO的排放最高。阐述了有效降低NOx和CO排放的方法。Homogeneous Charge Compression Ignition （HCCI） is a new combustion technology of engine. NOx and CO emission influenced with the change of valve timing at the different maximum opening points （MOP） of inlet and exhaust valve are studied in this paper. The results show that with valve timing advancing, NOx emission value is reduced to minimum, but value of CO emission is the maximum when boost pressure and over-flow air coefficient are both increased. The paper introduces an effective method to reduce NOx and CO emission.

关 键 词：均质充量压缩燃烧 气门正时 排放 

分 类 号：U464[机械工程—车辆工程]