整车PEMS测试冷启动工况排放特性研究  

Study on Emission Characteristics of Vehicle PEMS Test Under Cold Start Condition

作　　者：李长豫 杨永真 高旺 Li Chang-yu;Yang Yong-zhen;Gao Wang(China Automotive Technology&Research Center,Tianjin 300300,China)

机构地区：[1]中汽研汽车检验中心(天津)有限公司,天津300300

出　　处：《内燃机与配件》2023年第19期39-42,共4页Internal Combustion Engine & Parts

摘　　要：为了分析重型柴油车在PEMS试验中冷启动工况下的排放特征,本文选取重型柴油车进行了4次冷启动排放测试试验,分析颗粒物数量浓度及NOx污染物的排放特征。试验结果表明,冷启动工况下NOx污染物在瞬态排放及比排放量方面均占比较大,是PEMS试验中瞬态NOx污染物排放量最大的部分,但颗粒物排放数量及浓度在冷启动前后并无明显变化,认为与冷启动工况相关性不大;另外,分析整车行驶特征,发现驾驶行为[1]越激烈NOx比排放越大,两者存在一定程度的正相关性。In order to analyze the emission characteristics of heavy diesel vehicles under cold start condition in PEMS test,this paper selected one heavy diesel vehicle to conduct four cold start emission test tests to analyze the quantity concentration of particulate matter and emission characteristics of NOx pollutants.The test results show that the NOx pollutants in the cold start condition account for a relatively large proportion in both the transient emission and specific emission,which is the largest part of the emission of transient NOx pollutants in the PEMS test.However,the emission quantity and concentration of particulate matter do not change significantly before and after the cold start condition,so it is believed that there is little correlation with the cold start condition.In addition,by analyzing the driving characteristics of the vehicle,it is found that the more intense the driving behavior[1],the greater the NOx ratio emission,and there is a certain degree of positive correlation between the two.

关 键 词：PEMS 冷启动 排放特性 驾驶行为 

分 类 号：U473[机械工程—车辆工程]