基于PEMS试验的重型柴油车冷启动排放特征研究  

Research on Emission Characteristics of Heavy Diesel Vehicles during Cold-start Based on PEMS Test

作　　者：张靳杰 杨聪 徐达 李鑫 ZHANG Jinjie;YANG Cong;XU Da;LI Xin(CATARC Automotive Inspection Center(Wuhan)Co.,Ltd.,Hubei Wuhan 430056)

机构地区：[1]中汽研汽车检验中心(武汉)有限公司,湖北武汉430056

出　　处：《汽车实用技术》2021年第17期54-58,共5页Automobile Applied Technology

摘　　要：为了分析重型柴油车冷启动情况下各污染物的排放特征,文章选取了5辆重型柴油车进行实际道路车载试验。试验结果表明,从累计排放量上看,NOX在冷启动阶段的占比较大,而CO和PN在冷启动阶段的占比较小;从比排放上看,冷启动阶段NOX和CO的比排放较大,而PN在冷启动阶段的比排放时大时小;比较冷启动前后各污染物浓度的变化,发现NOX在冷启动前后有很明显的下降趋势,而PN和CO的变化趋势不明显,与车辆自身的情况有较大关系。车辆在冷启动阶段的NOX和CO排放是未来需要关注的重点。In order to analyze the emission characteristics of various pollutants under the condition of cold-start of heavy-duty diesel vehicles,5 heavy-duty diesel vehicles were selected for actual road vehicle testing.The test results show that,NOX accounts for a relatively large share in the cold start phase,while CO and PN account for a relatively small share in the cold-start phase,from the perspective of cumulative emissions.The specific emissions of NOX and CO during the cold start phase are relatively large,from the perspective of specific emissions.However,the specific emission of PN during the cold start phase was not always the larger one.Comparing the changes in the concentration of various pollutants before and after the cold start,it is found that NOX has a clear downward trend before and after the cold start,while the change trend of PN and CO is not obvious,indicating that the situation of the vehicle itself play a role in the emission of the PN and CO.It should be paid more attention to the NOX and CO emissions of vehicles during the cold start phase in the future.

关 键 词：冷启动 PEMS 重型柴油车 污染物排放 

分 类 号：U467[机械工程—车辆工程]