- 學位論文
B20玉米油甲酯使用不同的燃料噴射壓力對直噴式柴油引擎性能之影響
The Study on the Effect of Using B20 Corn Oil Methyl Ester with Different Injection Pressure on DI Diesel Engine Performance
摘要
一般生質柴油的比重、十六烷值、動力黏度和含氧量均高於石化高級柴油，而其中比重和動力黏度愈高的生質柴油會使燃料噴射時間提前致影響引擎的性能和廢氣排放濃度。本研究以B20玉米油甲酯生質柴油混合油為燃料，將針對柴油引擎燃料噴射壓力的高低做一探討分析，由引擎性能實驗結果顯示，燃料噴射壓力較原燃料噴射壓力低時，其燃料消耗率、smoke和HC排放濃度分別減低3.77%、10.74%和13.56%，但NOx排放濃度增加4.69%。反之，當燃料噴射壓力較原燃料噴射壓力高時，則燃料消耗率、smoke和HC排放濃度分別增加0.95%、16.70%和23.10%，而NOx排放濃度減低9.99%。由此結果可知、比重和動力黏度較高的生質柴油，可適當的將燃料噴射壓力減低是可行的。
並列摘要
The specific gravity, cetane number, dynamic viscosity, and the oxgen content of biodiesel was higher than fossil premium diesel, especially in higher specific gravity and dynamic viscosity causing the injection timing advanced so that effects engine performance and the concentration of exhaust emission. In this study the diesel engine injection pressure was investigated based on B20 corn oil methyl ester blended fuel. The experimental results of diesel engine performance demonstrated that BSFC, the concentration of Smoke and HC is respectively decreased about 3.77%, 10.74% and 13.56% based on lower injection pressure than original engine but the concentration of NOx is increased about 4.69%. On the other hand, BSFC, the concentration of Smoke and HC emission is increased about 0.95%, 16.70% and 23.10%, respectively. Moreover, the concentration of NOx is decreased about 9.99%. Therefore, using higher specific gravity and dynamic viscosity of biodiesel is able to decrease fuel injection pressure properly.