山路行驶的柴油车污染物排放特性试验

在山路和平路上,进行了不同载荷下国V柴油车的实际道路行驶排放(RDE)试验.采集车速、海拔、氮氧化物(Nox)和颗粒物数量(PN)排放浓度等数据,分析了道路坡度、车辆载荷与输出功率对排放的影响.研究发现:测试柴油车辆,在平均坡度约6％山路行驶时Nox排放因子高于平路20％以上,PN低于平路20％以上.道路坡度自0增大到...

Tests of exhaust emission characteristics for diesel vehicles driving on the mountain road

Reality driving emission(RDE)tests were carried out on loads in mountains and plains for diesel vehicles of the CHINA Phase V.The data of speed,altitude,NO_x and PN emission concentration,etc.were collected to investigate the influence of the slope of mountain road,the vehicle mass loads and the output power on NO_x and PN emissions of diesel vehicles.The results show that NO_x emission factors on mountain road with an average slope of about 6%are 20%at least higher than that on flat road,and PN emission factors are 20%at least lower than that on flat road.With the increased of gradient from 0 to 8%,NO_x emission concentrations increased by more than 1 times,and PN emission concentrations increased by 20%-60%.As the gradient increases further,NO_x and PN emission concentration increases slowly and then decreases.When the load increased,NO_x and PN emission concentrations increase.The emission rates of NO_x and PN are high in 10-40 kW region,and the high emission regions of NO_x and PN become wider with increased of load.The results can provide a reference for the setting of vehicle operating conditions for RDE test.