メタノール・水補助噴射によるディーゼル機関のＮＯｘ・排煙同時低減

石田 正弘, 植木 弘信, 坂口 大作, 黒川 清司

doi:10.1299/kikaib.66.648_2248

メタノール・水補助噴射によるディーゼル機関のＮＯｘ・排煙同時低減

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書誌事項

タイトル別名

Simultaneous Reduction of NOx and Smoke based on Port Injection of Methanol/Water Blend in a DI Diesel Engine.
メタノールミズホジョフンシャニヨルディーゼルキカンノ NOx ハイエンドウジテイゲン

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抄録

The auxiliary port injection system was built up using low pressure injectors installed on a commmon rail. Methanol/water blend was injected into each suction port of a four cylinder turbocharged DI diesel engine by controlling the injection timing and duration electronically. The optimum conditions of the injected amount of methanol/water blend and the blending ratio of methanol and water were investigated to obtain simultaneous reduction in both NO_x and smoke without increasing fuel consumption. In the theoretical study, the effect of methanol/water blend on combustion and NO formation was analyzed by using the two-zone model. The proposed auxiliary port injection of meth anol/water blend combined with the pilot fuel injection could be a feasible countermeasure.