摘要
采用多组分排放分析仪对一辆装有DOC后处理器的国Ⅳ柴油汽车的NO2排放进行了测试,研究了柴油机冷、热起动条件下DOC前后NOx排放中NO2的含量及其排放特性。结果表明,DOC前,NEDC循环下柴油机热起动时NO2与NOx排放均增高,冷起动和热起动时NO2占NOx的比例市区工况均高于市郊工况;DOC后,NOx排放基本不变,冷起动和热起动时NO2占NOx的比例均升高。
A China IV diesel car with DOC after treatment device was tested for NO2 emission with multiple component emission analyzer,and NO2 content in NOx emission and its emission characteristic before and after DOC in cold and hot start conditions of diesel engine are studied.The results show that before DOC in the NEDC cycle,NOx and NOx emission of diesel engine in hot start are higher,while proportion of NO2/NOx in urban area is higher than that in suburban areas in both cold start and hot start;After DOC,NOx basically remains unchanged while the proportion of NO2/NOx increases in both cold and hot start.
出处
《汽车技术》
北大核心
2011年第6期27-30,共4页
Automobile Technology
