Simultaneous Reduction of Pressure Rise Rate and Emissions of a CI Engine by Use of Dual-component Fuel Spray

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  • 二成分混合燃料噴霧による圧縮着火機関の圧力上昇率およびエミッションの低減
  • ニ セイブン コンゴウ ネンリョウ フンム ニ ヨル アッシュク チャッカ キカン ノ アツリョク ジョウショウリツ オヨビ エミッション ノ テイゲン

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Abstract

Combustion and emissions characteristics of dual-component fuel were evaluated for ranges of injection timing and intake oxygen concentration. Fuels used were mixtures of a gasoline-like component, i-octane, and diesel fuel-like component, n-tridecane, so that the effects of the difference in chemistry and volatility were investigated. The experimental study performed in a CI engine and the numerical analysis using multi-component fuel model demonstrated that the dual-component fuel reduced pressure rise rate due to the difference in the vapor formation rate between two components which have the different reactivity. Furthermore, the experimental results showed that the dual-component fuel achieves low NOx and soot combustion without suffering from penalty of thermal efficiency.

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