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MODELING OF DIRECT INJECTION DIESEL ENGINE EMISSIONS FOR A QUASI-DIMENSIONAL MULTI-ZONE SPRAY MODEL  

Jung, D. (Department of Mechanical Engineering, The University of Michigan)
Assanis, D.N. (Department of Mechanical Engineering, The University of Michigan)
Publication Information
International Journal of Automotive Technology / v.5, no.3, 2004 , pp. 165-172 More about this Journal
Abstract
Phenomenological models for direct injection diesel engine emissions including NO, soot, and HC were implemented into a full engine cycle simulation and validated with experimental data obtained from representative heavy-duty DI diesel engines. The cycle simulation developed earlier by Jung and Assanis (2001) features a quasi-dimensional, multi-zone, spray combustion model to account for transient spray evolution, fuel-air mixing, ignition and combustion. In this study, additional models for HC emissions were newly implemented and the models for NO, soot, and HC emissions were validated against experimental data. It is shown that the models can predict the emissions with reasonable accuracy. However, additional effort may be required to enhance the fidelity of models across a wide range of operating conditions and engine types.
Keywords
Diesel; Emissions; NO; Soot; HC; Quasi-dimensional; Multi-zone model;
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