直噴ガソリン噴霧の分割噴射特性 : 第1報混合気分布のLAS測定(エンジンの新しい計測技術とモデリング(2),エンジンの新しい計測技術とモデリング)

概要

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The mixture characteristics of DI gasoline spray by split injection were studied by using the Laser Absorption Scattering (LAS) technique. P-xyline was injected into a high temperature and pressure constant volume vessel to simulate gasoline sprays. Base on the comparison of the mixture characteristics between the single and double pulsed sprays, the following possible benefits of the split injection to stratified charge of DI gasoline engine were found: 1) high density liquid droplets piling up at the leading edge of the spray can be avoided, and subsequently the reduction of spray tip penetration; 2) the "over lean" (equivalence ratio less 0.7) can be reduced. These results are believed to contribute to reduction of DI gasoline engine-out smoke and HC emissions.
社団法人日本機械学会の論文
2004-09-04