非分散红外法应用于在用柴油车NO_x排放检测的研究

Research of NDIR Applied on Measuring NO_x Emission from In-Use Diesel Vehicles

柴油车排放的NO_x量大且占比高,污染状况不容忽视。针对目前柴油车排放环保定期检验中缺少NO_x检测方法和标准的情况,采用非分散红外法对210辆柴油车NO_x排放进行实测。结果显示,加载减速检测工况中80%VelMaxHP工况点可用于柴油车NO_x排放检测,有利于识别高排放车辆。该方法的推广应用,将为今后柴油车后处理装置的效果监管和车辆NO_x实际排放的日常检测提供重要技术支撑。

It cannot be ignored that diesel vehicles emit large amounts of NO_x.Nowadays,NO_x detection methods and standards are lack during the process of regular inspection for diesel vehicles.On the 210 diesel vehicles,NO_x emissions were measured by NDIR.Detection results showed that 80%VelMaxHP operating points of lug-down condition can be used for NO_x testing of diesel vehicles,which helps the identification of high emission vehicles.The application of this method will provide important technical support for the monitoring of the effectiveness of diesels’after-treatment devices as well as the annual check of NO_x emissions.