基于行程动力学参数的PEMS与CVS的排放特性研究  

Study on emission characteristics of PEMS and CVS based on stroke dynamics parameters

作　　者：高明 徐桂金 姚大宇 GAO Ming;XU Guijin;YAO Dayu(CATARC Automotive Test Center(Changzhou)Co.,Ltd.,Emission and Energy Saving Test Research Department,Changzhou 231000,Jiangsu,China)

机构地区：[1]中汽研汽车检验中心(常州)有限公司排放节能试验研究部,江苏常州231000

出　　处：《农业装备与车辆工程》2024年第7期29-33,49,共6页Agricultural Equipment & Vehicle Engineering

基　　金：中汽研汽车检验中心(常州)有限公司2022年度重点项目(CZ22P01)。

摘　　要：为了研究Ⅰ型试验中不同污染物排放特性,使用便携式排放测试系统(PEMS)与全流稀释系统(CVS),分析污染物排放因子与车辆的行程动力学参数、车速、加速度之间的相关性变化。结果表明,相对正加速度(RPA)与v·apos[95](速度与大于0.1 m/s^(2)正加速度的乘积的第95百分位)呈反比关系,CO、NOX、CO_(2)、PN排放因子均在低速段最高,CVS与PEMS采集数据趋势基本相同。汽车在加速阶段污染物排放显著增加,减速阶段污染物排放较少,对排放影响也较小,在v≤30 km/h,a≥0.8 m/s^(2)的情况下排放因子达到峰值。由于设备连接及进气方式的不同,使得CVS与PEMS的数值存在差异,但2套设备可同时用于试验以提高测试精度,因此本研究对Ⅰ型试验排放特性研究有着重大意义。In order to study the emission characteristics of different pollutants in the type I test,the portable emission test system(PEMS)and the full flow dilution system(CVS)were used to analyze the correlation between pollutant emission factors and the travel dynamics parameters,speed and acceleration of the vehicle.The results showed that there was an inverse relationship between relative positive acceleration(RPA)and v·apos[95](the 95th percentile of the product of velocity and positive acceleration greater than 0.1 m/s^(2)),and the emission factors of CO,NOX,CO_(2)and PN were highest in the low speed segment,and the data collected by CVS and PEMS were basically the same.In the acceleration stage,the emission of pollutants increases significantly;in the deceleration stage,the emission of pollutants was less,and the impact on emission was also small.When v≤30 km/h and a≥0.8 m/s^(2),the emission factor will reach a peak.Due to the difference of equipment connection and air intake mode,the values of CVS and PEMS were different,but the two sets of equipment could be used in the test at the same time to improve the test accuracy,so this study has great significance for the study of emission characteristics of type I test.

关 键 词：便携式排放测试系统 全流稀释系统 行程动力学参数 排放因子 污染物排放 

分 类 号：U462.3[机械工程—车辆工程]