不同类型机动车尾气中芳香烃化合物含量分析

首次对北京市9种车辆、5种燃料在不同工况下排放芳香烃化合物的特征．进行了定量研究。结果表明，车型、燃料、净化器及工况等因素对排放量产生影响，电喷车比化油器车芳香烃化合物排放量低；汽油车排放量最高，柴油车其次，LPG及CNG车排放量最低；使用净化器可以降低芳香烃排放量；不同工况对排放量的影响随车型，燃料类型的不同而不同。

Analysis on the concentration of aromatic hydrocarbons in the exhaust of different types of vehicles

Quantitative study on aromatic hydrocarbons in the exhaust of nine kinds of vehicles and five kinds of fuels under different working conditions in Beijing city has been carried out for the first time. It shows that type of vehicle, fuel, purifier and working conditions can affect its emission amount. The emission of vehicles with electronic sprayer engine is lower than that of vehicles with carburetor engine; The emission of vehicles using gasoline is the highest, the emission of vehicles using diesel is in the next place and the emission of vehicles using LPG and CNG is the lowest; Using purifier can lower the emission amount of aromatic hydrocarbons; The effect on emission amount under different working conditions is different with the change of type of vehicles and type of fuels. Therefore, using clean fuel, installing purifier and using electronic sprayer engine can reduce the content of aromatic hydrocarbons in the exhaust.