Title: Study on the Mechanism of Soot Formation and Oxidization in a DI Diesel Engine Using Postinjection
Abstract:The formation of particulate matter (PM or soot) emissions in diesel engines is of great interest, and the development of a predictive mechanism is an important part of understanding the production of...The formation of particulate matter (PM or soot) emissions in diesel engines is of great interest, and the development of a predictive mechanism is an important part of understanding the production of these pollutants. In this paper, a soot-oxidization model is presented on the basis of previous soot-mechanism research, referred to as average-reaction-rate (ARR) model. The ARR soot-oxidization model was combined with the Hiroyasu soot-formation model to compose the H-ARR soot model. With the H-ARR soot model, the process of soot formation and oxidization was numerically modeled according to different conditions of fuel postinjection. Meanwhile, the impact factors and effect mechanism of fuel postinjection on soot oxidization were analyzed in combination with experimental data. Finally, it was demonstrated that the resulting H-ARR soot model could describe the real process of soot formation and oxidization in diesel engine, as well as the influence rule of fuel postinjection on soot oxidization. Especially, it was observed that the brake specific soot emission can be reduced to 30% at the best experimental point of fuel postinjection.Read More
Publication Year: 2009
Publication Date: 2009-04-10
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 3
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