Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2001.06d
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- Pages.884-889
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- 2001
Modeling of Piston Crevice Hydrocarbon Oxidation in SI Engines
전기점화 기관 간극 체적 내 미연탄화수소의 산화 모델링
- Published : 2001.06.27
Abstract
Combustion chamber crevices in SI engines are identified as the largest contributor to the engine-out hydrocarbon emissions. The largest of crevice region is the piston ring pack crevice. To predict and understand the oxidation process of piston crevice hydrocarbons, a 3-dimensional numerical simulation method was developed. A engine shaped computational mesh with moving grid for piston and valve motions was constructed. And a 4-step oxidation model involving 7 species was used and the 16 coefficients in the rate expressions were optimized based on the results from a detailed chemical kinetic mechanism for the oxidation condition of engine combustion chamber. Propane was used as a fuel in order to eliminate oil layer absorption and liquid fuel effect.
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