Simulating the effects of fuel injection characteristics on DI diesel engine emissions 2000-05-0022
An upgraded multizone model is developed in order to study the
effects of fuel injection characteristics on DI diesel engine soot
and NOx emissions. Effects of fuel spray characteristics, the
movement and evaporation of droplet, and spray wall impingement are
considered. NOx emission is predicted by the extended Zeldovich
mechanism and soot emission is simulated by the current soot
formation and oxidation model. The multizone model can be used to
calculate cylinder pressure, heat release rate, engine performance,
NOx and soot emissions, etc.
In this paper, the boot injection and split injection are
simulated. The simulation shows that the fuel injection
characteristics have significant effects on the process of engine
combustion and emissions. The NOx and PM emissions from DI diesel
engine can be reduced simultaneously by optimizing the shape of
injection rate, especially by boot injection.
Shenghua Liu, J. W. Hwang, M. H. Kim, J. O. Chae, T. Y. Chung
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