南京市机动车排气监测与评价

通过对南京市机动车排气污染物的年检监测,表明南京市的汽油车、柴油车、摩托车排气合格率总体呈上升趋势,2002年全市机动车排气监测总合格率为99.9%,比1993年上升了8.6个百分点;汽车尾气达标率也呈上升趋势,2002年达83.8%,比1993年上升了2.6个百分点。对机动车排气路检结果表明,CO超标的车辆占84.4%,CO、HC两项指标都超标的车辆占31.1%。对各类汽油助力车排气监测结果表明,二冲程汽油助力车尾气中CO、HC排放量要高于四冲程汽油助力车的排放量。对各类正三轮摩托车排气抽检结果表明,大部分四冲程正三轮摩托车尾气排放污染物能达标,且排气管无碳烟;二冲程正三轮摩托车尾气中HC值偏高,排气管碳烟明显。

Monitoring and Assessing aboutthe Motor Vehicle Emissionin Nanjing

According to the annual monitoring to motor vehicle emission in Nanjing, the total legal rate of vehicle emission is increasing. In 2002, it was 99.9%, 8.6% more than 1993. For cars, it was 83.8%, 2.6% more than 1993. The in-site monitoring indicated that, the rate of motor vehicle which CO in emission were beyond standard was 84.4%, for CO and HC, it was 31.1%. For motorcycles, the CO and HC in emission for two-stroke gasoline engine was more than four- stroke gasoline engine.