多种轻型车气体污染物排放水平的转鼓试验及评价  

Gaseous pollutant emissions from different types of light-duty vehicles using chassis dynamometer tests and its evaluating

作　　者：张凡[1] 杨正军[1] 杨超[1] ZHANG Fan;YANG Zhengjun;YANG Chao(China Automotive Technology&Research Center,Tianjin 300300,China)

机构地区：[1]中国汽车技术研究中心有限公司

出　　处：《汽车安全与节能学报》2018年第3期308-316,共9页Journal of Automotive Safety and Energy

摘　　要：测量了不同轻型车的总碳氢THC、一氧化碳CO和氮氧化物NO_x气体污染物排放,并定量评价了中国内地轻型车气体污染物排放水平的变化情况。对于使用不同排放标准的106辆轻型柴油车、缸内直喷汽油车和多点电喷汽油车,在转鼓试验台上,进行了不同循环工况的单位行驶里程排放试验。结果表明:国5阶段缸内直喷汽油车的THC和CO的排放约为国4阶段的86%和65%,但NO_x的排放基本不变。由于全球统一轻型汽车测试循环(WLTC)超高速阶段高车速、急加速的工况条件而产生了大量CO和NO_x排放。冷态条件时、欧盟标准的市区工况(ECE)下的CO和NO_x排放,高于市郊工况(EUDC)。发动机水温和催化器温度对轻型车的气体污染物排放起到主导作用。Measured the emissions of total hydrogen carbonite(THC)、carbon monoxide(CO)and nitrogen oxides(NOx)from different light-duty vehicles to quantitatively evaluate the gaseous pollutants emissions from domestic light-duty vehicles in China.Tested the driving cycle’s emissions of 106 light-duty vehicles including diesel,gasoline direct injection(GDI)and multi-point injection(MPI)gasoline vehicles on a chassis dynamometer with different emissions standards.The results show that the average emissions are 86%for THC and 65%for CO for the GDI gasoline vehicles at the stage 5 of the National Standard comparing to the values at the stage 4 of the National Standard with the NOx average emissions of those remaining the same at both stages of the National Standard.CO and NOx emissions increase largely due to the high-speed and long-acceleration working conditions during the ultra-high-speed stage of WLTC(world-wide harmonized light vehicles test cycle).CO and NOx emissions of ECE(economic commission for Europe)stage are higher than those during the stage of EUDC(extra urban driving cycle)at cold conditions.The temperatures of engine water and catalyst play a great role on the conventional pollutant emissions from light-duty vehicles.

关 键 词：轻型汽车 排放水平 气体污染物 柴油车 汽油缸内直喷(GDI) 多点电喷(MPI) 转鼓试验 

分 类 号：U467.12[机械工程—车辆工程]