广州市营运车辆排放状况分析

Analysis of Commercial Vehicle Emission in Guangzhou

营运车辆主要包括城市公交、出租车和长途客货运车。虽这些车辆所占机动车比例小,由于使用频率高、使用时间长、年行驶里程长,是城市机动车排气监管的重点。广州近年营运车辆排气检测数据分析结果表明,营运车辆的整体排放状况较好,抽检超标率均低于10%,但相对拟修订国家标准a类限值来说燃气公交车的超标约为70%,因此,广州对燃气公交车应进一步加强维护维修与保养,按规定定期更换机尾净化器等措施促进其超标率的降低。

The commercial vehicles mainly included bus, Taxi, long-distance passenger and freight vehicles. Although the commercial vehicle was a small percentage of vehicles, it was focal point in the vehicles exhaust supervision because of high use frequency,long use time and long running distance, and high emission amount. In Guangzhou, the overall emission of the commercial vehicle was relatively good by sample detection data analysis in recent years, and the exceeding standard rate was lower than 10%. However, the sample detection data was evaluated according to ＂a＂ limit value of the proposed revision national standard, it was not very optimistic as the exceeding standard rate of the gas bus was about 70%. Therefore, gas bus should be asked to further strengthen the maintenance and repair and regularly replace the tail purifier in accordance with the regulations to reduce exceeding standard rate in Guangzhou.