液化石油气汽车颗粒物数量排放特征的研究  

A Study on the Characteristics of PM Number Emission from LPG Vehicle

作　　者：王军方[1] 丁焰[1] 尹航[1] 谭建伟[2] 殷宝辉[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]北京理工大学机械与车辆工程学院,北京100081

出　　处：《汽车工程》2013年第7期645-648,共4页Automotive Engineering

基　　金：国家自然科学基金(40805053)资助

摘　　要：利用颗粒物数量测试仪器ELPI对瞬态循环下的汽油车和液化石油气汽车进行颗粒物排放测量。结果表明,两种车辆排放的颗粒物中,粒径小于70nm的颗粒物均占绝对优势,占总排放的80%～90%;大于490nm的颗粒物在总排放中的比例均非常小。且颗粒物数量排放浓度随着车速的升高而增加,尤其是车速超过70km/h后,颗粒物数量排放随车速的增幅升高。但两种车辆相对比较,汽油车排放的颗粒物数量比液化石油气汽车多。The particulate matter （PM） emissions from both gasoline vehicle and liquefied petrol gas （LPG） vehicle in transient driving cycles are measured with electrical low-pressure impactor （ELPI）. The results show that in two types of vehicles the majority, i.e. 80% to 90% of PM have a size smaller than 70nm and only a very little proportion of PM are larger than 490nm. The PM number concentration of emission increases with the rise of vehicle speed, in particular, it grows more sharply when vehicle speed higher than 70km/h. But in comparison between two types of vehicles, the number of PM emitted from gasoline vehicle is more than that from LPG vehicle.

关 键 词：汽油车 液化石油气汽车 颗粒物排放 数量浓度 粒径分布 

分 类 号：X734.2[环境科学与工程—环境工程]