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The characteristics of combustion and emission of biodiesel fuel were investigated in a single cylinder DI diesel engine equipped with a common rail injection system. In order to compare the emissions of oxygenated fuel with the diesel fuel, tested fuels were neat diesel and biodiesel obtained from soybean oil. Experimental results show that the peak injection rate is reduced when the engine is fueled with biodiesel at 100㎫ injection pressure. The peak combustion pressure and heat release of biodiesel was lower than that of diesel at an injection pressure of 100㎫ because of lower heating value. However, NO<SUB>x</SUB> emission of biodiesel combustion was decreased compared with diesel combustion. The ignition delay of biodiesel was reduced due to a higher cetane number of the biodiesel fuel. HC and CO emissions are decreased at a high injection pressure. Cooled-EGR increased the ignition delay and decreased maximum combustion pressure and the NO<SUB>x</SUB> emission was rapidly decreased with 30, 45% of EGR rate.

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Abstract
1. 서론
2. 실험장치 및 방법
3. 실험 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-556-017555777