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机动车排放已成为我国大中城市的主要污染源,研究机动车排放的影响因素对控制排放降低污染具有积极的意义。本研究应用美国Sensors公司生产的SEMTECH-DS车载排放测试仪,测试了同一部排量为1.6L的汽油小轿车在深圳市3种不同类型的典型道路工况下的排放污染物(CO、HC、NOx)的排放特征,对测试数据进行深入的分析,结果表明:车辆的各种排放因子随速度的降低而增加,车速低于10km/h的排放污染物急剧增加;车辆在不同特征道路行驶的CO与HC平均排放因子(g/km)相差显著,在城市次干道低于10km/h车速下的排放占全程总排放的30%以上,CO与HC的平均排放因子是快速路的2～5倍。
Motor vehicle emission has become the main pollution source in large and medium-sized cities in our country. Studying the influencing factors of vehicle emission has a positive meaning to reduce pollution. In this study, SEMTECH-DS vehicle emission tester manufactured by Sensors Company of America was used to test the emission of pollutants (CO, HC , NOx). The results show that all kinds of emission factors of vehicles increase with the decrease of speed, and the emission pollutants with speed less than 10km / h increase sharply. Vehicles travel on different characteristic roads (G / km), the emission of CO under the sub-urban trunk road less than 10km / h accounted for more than 30% of the total discharge, and the average emission factor of CO and HC was 2 ~ 5 times.