Hao Lijun, Zhao Zhouhui, Yin Hang, Wang Junfang, Li Lanju, Lu Wenhui, Ge Yunshan, Sjödin Åke
School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Chemosphere. 2022 Jun;297:134171. doi: 10.1016/j.chemosphere.2022.134171. Epub 2022 Mar 2.
Diesel vehicle emissions generally deteriorate with vehicle mileage due to the wear and deterioration of vehicle parts. Most of the experimental studies on vehicle emission durability were carried out based on the standard operation cycles of engine or vehicle, few research investigated vehicle emission deterioration characteristics under real driving conditions. In this research, the real driving emission (RDE) test method was used to investigate and evaluate the emission deterioration characteristics of two China-V diesel vehicles equipped with DOC and SCR systems. The experimental results show the emissions of CO and NOx from the N2 and N3 diesel vehicles increase with the vehicle mileage, showing the tendency of emission deterioration. The calculated deterioration factors of N2 and N3 diesel vehicle CO and NOx emissions are greater than the recommended values in China standard HJ 438-2008, which means experimental study on the vehicle emissions durability is necessary. The vehicle emissions deterioration depends on real driving conditions and the vehicle usage over vehicle lifetime.
由于车辆部件的磨损和老化，柴油车排放通常会随着车辆行驶里程的增加而恶化。大多数关于车辆排放耐久性的实验研究是基于发动机或车辆的标准运行循环进行的，很少有研究调查实际驾驶条件下车辆排放恶化特征。本研究采用实际行驶排放（RDE）测试方法，对两辆配备DOC和SCR系统的国五柴油车的排放恶化特征进行了调查和评估。实验结果表明，N2和N3柴油车的CO和NOx排放随着车辆行驶里程的增加而增加，呈现出排放恶化的趋势。N2和N3柴油车CO和NOx排放的计算恶化因子大于中国标准HJ 438-2008中的推荐值，这意味着有必要对车辆排放耐久性进行实验研究。车辆排放恶化取决于实际驾驶条件和车辆整个使用周期内的使用情况。
