出租车PEMS与VMAS排放测试比较  

Comparison between PEMS and VMAS Based on Taxi Emission Measurement

作　　者：方荣华[1] 彭美春[1] 吴晓伟[1] 李剑锋[1] 林怡青[1] 

机构地区：[1]广东工业大学机电工程学院,广东广州510090

出　　处：《车用发动机》2011年第2期42-46,共5页Vehicle Engine

摘　　要：以1辆LPG出租车为研究对象,研究PEMS排放测试与VMAS排放测试的差异性与相关性,在转鼓试验台上按IG195简易瞬态工况运行,分别采用VMAS与PEMS排放测试系统进行CO,HC与NOx排放测试。对排放速率、排放因子测试结果进行对比分析,发现两种测试方法下对应工况排放值的变化趋势相同;两者测试原理不同,PEMS测得的CO,HC与NOx的排放速率、排放因子均较VMAS大,PEMS测试结果更准确;VMAS测试方法与PEMS测试方法测得的CO,HC,NOx的排放速率线性相关系数分别为0.881 9,0.868 1,0.772 3,两者存在较好的线性相关性。For a LPG taxi,the difference and correlation between PEMS and VMAS were studied.Using the VMAS and PEMS respectively,the CO,HC and NOx emission were measured by IG195 short transient driving cycles on the roller test bench.Through comparing and analyzing the emission rate and exhaust factor of the two systems,the emission trends of corresponding working conditions were found to be the same.The measurement principles between them were different.The emission rate and exhaust factor of PEMS were larger than those of VMAS,but the measurement results of PEMS were more accurate.The liner correlation coefficient of CO,HC and NOx exhaust rate between PEMS and VMAS was 0.881 9,0.868 1,and 0.772 3 respectively,which indicated that the two emission measurement systems had good liner correlation.

关 键 词：排放测试 汽车排放总量分析系统 便携式排放测量系统 出租车 

分 类 号：U270.7[机械工程—车辆工程]