海拨高度对柴油机起动污染物排放的影响  

Pollutant emission characteristics during start process under different altitude of diesel engine

作　　者：胡志远[1] 于书祥 阚泽超 曹志义[2] 楼狄明[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]北方发动机研究所,山西大同037036

出　　处：《中国环境科学》2018年第1期91-96,共6页China Environmental Science

摘　　要：以某大功率低压缩比柴油机为研究对象,进行了0,1000,2000,3000,3750,4500m 6个海拨高度的起动排放试验,研究了该柴油机不同海拨高度下起动过程中的HC,CO,NO_x和颗粒物排放特性.结果表明:海拨升高,柴油机起动过程的HC,CO和颗粒物排放增加,NOx排放降低;与平原(0m海拨)比较,该柴油机高原(4500m海拨)冷起动排放的HC,CO和颗粒物分别增加7.1,2.6和2.1倍,NOx降低53.8%;0~4500m海拨,该柴油机起动过程排放的颗粒物中聚集态颗粒物质量占94%~99%,颗粒物数量呈单峰对数分布,峰值粒径随着海拨的升高向大粒径方向移动,几何平均粒径增大.A number of starting pollutant emission tests of a high-power, low compression ratio diesel engine at 0, 1000, 2000, 3000, 3750 and 4500m altitude have been carried out respectively. The aim was to research emission characteristics of HC, CO, NOx and particulate matter from start process of low compress ratio diesel engine at different altitudes. The test results shown that the HC, CO and particulate matter emissions of the tested diesel engine increases with the sea level rise, whereas NOx emissions decreased. The HC, CO, particulate matter emissions at 4500m were increased by 7.1. 2.6, and 2.1times compared that at 0m, but NOx decreased by 53.8%. The mass fraction of aggregated particles accounted for 94%~99% of the total particulate matter mass emission during the process of starting the diesel engine under 0~4500m altitude, and the quantity of particulates showed single peak value logarithmic distribution, the peak particle size, as well as the geometric mean particle diameter increases with the rising of altitude.

关 键 词：污染物排放 海拨 起动 柴油机 

分 类 号：X502[环境科学与工程—环境工程]