摘要
为实现车用柴油机大流量废气再循环,研制了氧化催化转化器(DOC)后处理器与大流量冷却式废气再循环(L-CEGR)系统组成的排放控制新技术配置,并在11L车用发动机上进行了试验。试验结果表明:采用电控可变几何涡轮增压器(VGT)为主件的L-CEGR系统使NOx排放下降28.6%;采用160MPa高压喷射和进气优化后,PM排放降低74.4%,铂含量为0.55g/unit的DOC能使PM排放降低20%;柴油机各项排放指标均达到国Ⅳ标准,也符合NO2排放限值要求;L-CEGR与160MPa高压喷射等技术相结合,使发动机加权平均燃油消耗率降低3.5%。
To realize the large flow,cooled exhaust gas recirculation（L-CEGR） goal in vehicle diesel engine,the new emission control technology configuration consisting of newly developed diesel oxidation catalyst（DOC） and L-CEGR system was used in an 11-liter displacement engine.The test results show that： characterized by using electron-controlled variable geometry turbocharger（VGT）,the L-CEGR reduces NOx by 28.6%,160 MPa injection pressure and intake flow optimization can lower PM by 74.4%,DOC containing Pt of 0.55 g/unit can reduce the rest PM by 20%,the engine fully complies with China IV standards and NO2 limits,combination of L-CEGR and 160 MPa high pressure injection technology also reduces engine weighted average fuel consumption rate by 3.5%.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2012年第2期6-10,19,共6页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
车用柴油机
废气再循环
氧化催化转化器
排放
IC engine
vehicle diesel engine
exhaust gas recirculation（EGR）
diesel oxidation catalyst（DOC）
emission
