Division of Air Quality Control Research, National Institute of Environmental Research, Incheon, Republic of Korea.
Environ Technol. 2011 Aug-Sep;32(11-12):1173-81. doi: 10.1080/09593330.2010.505611.
In Korea emissions from motor vehicles are a major source of air pollution in metropolitan cities, and in Seoul a large proportion of the vehicle fleet is made up of gasoline-powered passenger cars. The carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx) and carbon dioxide (CO2) contained in the exhaust emissions from 76 gasoline-powered passenger cars equipped with three-way catalysts has been assessed by vehicle speed, vehicle mileage and model year. The results show that CO, HC, NOx and CO2 emissions remained almost unchanged at higher speeds but decreased rapidly at lower speeds. While a reduction in CO, HC and NOx emissions was noticeable in vehicles of recent manufacture and lower mileage, CO2 emissions were found to be insensitive to vehicle mileage, but strongly dependent on gross vehicle weight. Lower emissions from more recent gasoline-powered vehicles arose mainly from improvements in three-way catalytic converter technology following strengthened emission regulations. The correlation between CO2 emission and fuel consumption has been investigated with a view to establishing national CO2 emission standards for Korea.
在韩国，机动车排放是大都市空气污染的主要来源，而在首尔，很大一部分机动车队由汽油动力乘用车组成。通过车速、行驶里程和车型年，评估了装有三元催化转化器的 76 辆汽油动力乘用车的尾气排放中的一氧化碳（CO）、碳氢化合物（HC）、氮氧化物（NOx）和二氧化碳（CO2）含量。结果表明，CO、HC、NOx 和 CO2 的排放在较高速度下几乎保持不变，但在较低速度下迅速下降。虽然最近制造和行驶里程较低的车辆的 CO、HC 和 NOx 排放明显减少，但 CO2 排放对车辆行驶里程不敏感，但与整车重量密切相关。最近汽油动力车辆排放的减少主要是由于排放法规加强后三元催化转化器技术的改进。还研究了 CO2 排放与燃料消耗之间的关系，以期为韩国制定国家 CO2 排放标准。
