重型柴油车NO_x排放检测现状及方法

刘宗昊¹，刘树成^1*，刘加昂¹，苗壮²

1.山东省机动车排气污染监控中心，山东 济南   250102；

2.青岛无车承运服务中心有限公司，山东 青岛   266000

摘要：以山东省在用重型柴油车为研究对象，调研定期排放检验、遥感监测和远程监控在重型柴油车NO_x排放监管中的应用现状，采用恒定转速法和自由加速法试验研究重型柴油车的NO_x排放规律。调研结果表明：定期排放检验和遥感检测2种方法测得的车辆NO_x排放与重型柴油车实际NO_x排放情况不符，远程监控形式测得的NO_x排放与实际情况相符。试验结果表明：恒定转速法和自由加速法测得的重型柴油车NO_x体积分数能够真实反映重型柴油车NO_x的排放规律，都可用于重型柴油车NO_x排放的快速检测。

关键词：重型柴油车；NO_x排放；检测方法

Detection status and detection methods of NO_x emission for heavy-duty diesel vehicles

LIU Zonghao¹, LIU Shucheng^1*, LIU Jiaang¹, MIAO Zhuang²

1. Shandong Motor Vehicle Exhaust Pollution Monitoring Center, Jinan 250102, China;

2. Qingdao Car-free Transportation Service Center Co., Ltd., Qingdao 266000, China

Abstract: Taking heavy-duty diesel vehicles in use in Shandong Province as the research object, this study investigated the application status of regular emission inspection, remote sensing monitoring, and remote monitoring in the regulation of NO_xemissions from heavy-duty diesel vehicles. The constant speed method and free acceleration method are used to experimentally study the NO_xemission characteristics of heavy-duty diesel vehicles. The results show that the NO_x emissions measured by two methods, regular emission inspection and remote sensing detection, do not match the actual NO_x emissions of heavy-duty diesel vehicles. The NO_xemissions measured by remote monitoring are consistent with the actual situation. It is also show that the volume fraction of NO_x measured by the constant speed method and the free acceleration method can truly get the emission characteristics of NO_x from heavy-duty diesel vehicles, and both can be used for rapid detection of NO_x emissions from heavy-duty diesel vehicles.

Keywords: heavy-duty diesel vehicle; NO_xemission; detection method