基于PEMS的重型柴油车尾气污染物排温敏感性试验研究  

Experimental Study on Exhaust Temperature Sensitivity of Exhaust Pollutants from Heavy-duty Diesel Vehicles Based on PEMS

作　　者：王志红[1,2] 钱超[1,2] 郑灏[1,2] 尹冬冬[1,2] Wang Zhihong;Qian Chao;Zheng Hao;Yin Dongdong(Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology,Hubei Wuhan 430070;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology, Hubei Wuhan 430070)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,湖北武汉430070

出　　处：《汽车实用技术》2017年第2期171-175,共5页Automobile Applied Technology

基　　金：国家自然科学基金资助项目(51406140)

摘　　要：围绕国Ⅴ重型柴油车排放气态污染物排温敏感特性规律开展相关研究工作。研究中,基于便携式车载排放测试系统(PEMS)获取典型国Ⅴ重型柴油车实际道路工况下排气系统尾管温度及主要气态污染排放物的瞬态特征。进一步,以瞬态排放因子为关键评价指标,采用温度分段平均法获得目标车主要气态污染物排温敏感特性,结果显示:随排气温度升高,NOx排放总体呈下降趋势,CO和HC排放总体呈先下降后上升趋势。研究表明,国Ⅴ重型柴油车道路工况下排气污染物受排气温度影响显著。The researches on exhaust temperature sensitive characteristics of emission gaseous pollutants from a StateⅤheavy-duty diesel vehicle are developed.In this study, based on the portable on-board emission measurement system (PEMS),the exhaust system stern tube temperature and the transient characteristics of the main gaseous pollutants of the typical StateⅤheavy-duty diesel vehicle on actual road conditions are obtained.Then use transient emission factor as the key evaluation index to obtain exhaust temperature sensitive characteristics of main gaseous pollutants through temperature section average method.The characteristic test results show that, with the exhaust temperature rising, NOx emissions is a downward trend in general and CO and HC emissions are falling at first and rising slightly later.Studies have shown that the exhaust pollutant of the StateⅤheavy-duty diesel vehicle on actual road conditions significantly influenced by the exhaust temperature.

关 键 词：重型柴油车 PEMS 排温敏感性 排放因子 后处理系统 

分 类 号：U472.9[机械工程—车辆工程]