不同海拔下轻型汽油车RDE排放特性研究  

RDE Test Study on the Characteristics for Light-duty Gasoline Vehicles at Different Altitudes

作　　者：李璇 Li Xuan

机构地区：[1]中汽研汽车检验中心(昆明)有限公司,云南昆明651701

出　　处：《时代汽车》2024年第16期177-180,共4页Auto Time

摘　　要：为探究在不同海拔下轻型车实际行驶污染物排放的变化规律,在柳州(100m)、蒙自建水(130m)、昆明(1900m)和西宁(2400m)这四个不同海拔的城市下,采用轻型车便携式排放测试设备PEMS对一辆轻型汽油车进行了实际行驶工况的NO_(x)、CO、CO_(2)、PN(颗粒物数量 Particle Number)排放试验的研究。研究表明,随着海拔的升高,空气密度降低,发动机负荷减小,CO随海拔升高是增大的趋势;CO_(2)随海拔整体变化差异不大;NO_(x)随海拔升高有先降低再升高的趋势,2400m时,排放相比1900m升高5倍;PN随海拔升高有先降低再升高的趋势,1900m时比100m海拔排放降低至原来的三分之一。To investigative the RDE on the characteristics for light-duty gasoline vehicles at different altitudes,a NO_(x),CO,CO_(2),PN(Particle Number)emission test was carried out on a light-duty petrol vehicle at four different altitudes,namely,Liuzhou(100m),Jianshui(130m),Kunming(1900m),and Xining(2400m),using portable emission test equipment for light-duty vehicles(PEMS)for the actual driving conditions.Particle number emission tests were conducted on a light-duty petrol vehicle under real driving emission using the PEMS portable vehicle emission test equipment.The study shows that,with the increase of altitude,the air density decreases,the engine load decreases,CO increases with the increase of altitude;CO_(2) does not vary much with the overall change of altitude;NO_(x) has a tendency to decrease and then increase with the increase of altitude,and the emission is 5 times higher at 2400m compared with that at 1900m;PN has a tendency to decrease and then increase with the increase of altitude,and the emission is 3 times lower at 1900m compared with that at 100m altitude.PN has a tendency to decrease and then increase with altitude,and the emission at 1900m is 3 times lower than that at 100m.

关 键 词：轻型车 实际行驶污染物排放 海拔 排放特性 

分 类 号：U46[机械工程—车辆工程]