基于比功率的LPG公交车排放特性研究  

A Study on the Emission Characteristics of LPG Transit Buses Based on VSP

作　　者：彭美春[1] 吴晓伟 江晓燕[1] 

机构地区：[1]广东工业大学机电学院,广州510006 [2]三一重工路面机械研究院,长沙410100

出　　处：《汽车工程》2014年第3期269-272,263,共5页Automotive Engineering

基　　金：国家863计划项目(2006AA11A1C7)资助

摘　　要：为研究LPG公交车排放特性与比功率的关系，推导了公交车比功率（VSP）的计算公式，并采用车载排放测试技术测试了车辆实际运行工况下的排气污染物的排放值和车速，对数据进行处理与分析j结果表明，公交车实际运行的VSP落在-5—5kW／t区间内的行驶时间占比约大于96％。VSP为负时，排气污染物排放速率变化较小，排放因子随着VSP增大缓慢增大；VSP为正时，随着VSP增大，CO和HC的排放速率与排放因子先增大后减小，NO，排放速率呈增大趋势，而排放因子先增大，后缓慢下降。For studying the relationship between emission characteristics and vehicle specific power （VSP） of LPG transit buses, the formula of VSP for transit bus is derived, the speed and pollutant emissions of buses under real operation conditions are measured with portable emission measurement system with these data processed and analyzed. The results show that the proportion of bus driving time in real operation with their VSP falls into the interval of [-5, 5 ] kW/t is more than 96%. At negative VSP range, the emission rates of all pollutants only have minor change and their emission factors increase slowly with the rise of VSP; while at positive VSP range, with the increase of VSP, the emission rates and emission factors of CO and HC rise first and then fall ; while the emission rate of NOx shows a tendency of steady increase and its emission factor rises first and then falls slowly.

关 键 词：LPG公交车 排放速率 排放因子 比功率 车载排放测试 

分 类 号：U469.7[机械工程—车辆工程]