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http://dx.doi.org/10.15231/jksc.2015.20.3.013

The Study for Improving the Combustion in a D.I. Diesel Engine using Multi-cavity Piston  

Park, Chul Hwan (Department of Mechanical Engineering, Graduate School, Kumoh National Institute of Technology)
Bang, Joong Cheol (Department of Mechanical Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society of Combustion / v.20, no.3, 2015 , pp. 13-20 More about this Journal
Abstract
The performance of a direct-injection diesel engine often depends on the strength of swirl or squish, the shape of combustion chamber, the number of nozzle holes, etc. This is natural because the combustion in the cylinder was affected by the mixture formation process. Since the available duration to make the mixture formation of air-fuel is very short, it is difficult to make complete mixture. Therefore, an early stage of combustion is violent, which leads to the weakness of noise and vibration. In this paper, the combustion process of a common-rail diesel engine was studied by employing two kinds of pistons. One has several cavities on the piston crown to intensify the squish during the compression stroke in order to improve the atomization of fuel, we call this multi cavity piston in this paper. The other is a toroidal single cavity piston, generally used in high speed diesel engines. To take photographs of flame and flaming duration, a four-stroke diesel engine was remodeled into a two-stroke visible single cylinder engine and a high speed video camera was used.
Keywords
Visible engine; Multi cavity piston; Two stage injection; High speed flame photographs; Cylinder pressure diagram;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
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