Research On China ? Light Gasoline Vehicles Real Driving Emission(RDE) Characteristics

While the car provides great convenience for people's production and life,it also brings huge pollution to people's living environment.To measure vehicle emissions characteristics,many countries have established strict regulations to strengthen the supervision and control of vehicle emissions.Taking light gasoline vehicles as an example,vehicle emission tests are usually based on laboratory chassis dynamometers or engine rig dynamometers,as well as remote sensing technology.However,the influencing factors of the vehicle when driving on the road are numerous and varied,and the measured emissions of the vehicle on the road are different from the emission characteristics under the specific working conditions in the laboratory.This paper studies the real driving emission characteristics of typical vehicles under different environmental boundary conditions,and analyzes the sensitivity of different influencing factors,providing data support for vehicles with different technical routes that meet national ? emission standards.Different from the chassis dynamometer and engine bench test,the pollutant emission during the real driving emission of the light vehicle is mainly affected by environmental boundary conditions,engine control parameters,post-processing control strategies and other factors.RDE emissions of gasoline and diesel prototypes meeting national V emission standards at different altitudes and outside air temperatures were studied by vehicle emission equipment.The RDE test method,the similarities and differences between RDE tests in Europe and China,and the RDE performance of vehicles in high altitude and low temperature environments in China explored the adaptability of RDE in China.The results show that the RDE test method can be used to detect and further control the real emissions of vehicles under extended altitude conditions in China.The performance of different types of post-processing technology routes varies with the mileage of the vehicle.According to different environmental boundary conditions and real endurance history,the influence characteristics of environmental boundary conditions on the performance indexes of different technical route postprocessing devices are analyzed,and the ?s of different countries are evaluated.The characteristics of the technical route.At the same time,it analyzes the changes of the mileage of different technical routes with the vehicle,and provides data support for the establishment of post-processing key components rapid aging methods and performance evaluation specifications and technical route selection to meet national ? emission standards.