Cold Start Emission Characteristics of Diesel Engine at High Altitude and Low Temperature
2022-01-0682
03/29/2022
- Event
- Content
- Diesel engine is the core in the field of engineering machine power plant, while both at home and abroad for the diesel engine cold start the transient emission characteristics below 0 ℃ and above 2000m is almost a blank. Therefore, aimed at high altitude and low temperature environment emission characteristics of diesel engine cold start, this article has carried on the systematic analysis and research. In this paper, a simulation test system for cold start of diesel engine at low temperature at high altitude is established. The cold start experiments of a heavy diesel engine at different ambient temperatures (10℃, 0℃, -10℃ and -20℃) and different altitudes (0m, 3000m and 4000m) is carried out. In this paper, the gas emission of diesel engine during the speed-up period of cold start is studied. The main conclusions are as follows: (1) With the increase of altitude and the decrease of ambient temperature, HC emission of diesel engine during cold start speed-up period is obviously increased, and NOx emission increases gradually. HC emission mainly concentrated in the cycle with high cylinder pressure and increased significantly when the rotation speed fluctuated violently during the starting process, The NOx emission mainly occurs after the cycle of high pressure in the cylinder. (2) At 3000m and below -10℃, the total HC emission at cold start is 18~1280 times of that at 0m and 10℃, The total NOx emission rises to 15~190 times.
- Citation
- Pan, X., Xiang, B., Lou, D., zhang, y. et al., "Cold Start Emission Characteristics of Diesel Engine at High Altitude and Low Temperature ," SAE Technical Paper 2022-01-0682, 2022, .