乙醇添加燃料應用於燃油噴射機車引擎之研究

Investigating of Ethanol-Blended-Fuels Application on EFI Motorcycle Engine

陳榮哲(Rong-Zheng Chen)

指導教授 ： 吳浴沂

國立臺北科技大學/機電學院/車輛工程系所/碩士(2007年)

摘要

本研究將95無鉛汽油與99.9%之無水乙醇調配成乙醇含量1%(E1)、2%(E2)、5%(E5)、10%(E10)、20%(E20)及30%(E30)之乙醇汽油混合燃料，應用於一單缸四行程125cc燃油噴射機車引擎上，探討乙醇汽油對於引擎性能、油耗、排氣污染與燃燒等影響。
實驗結果顯示，使用乙醇汽油混合燃料在部份負荷情況下，因為容積效率的提升，扭力最多提升18%，全負荷時扭力並無明顯提升但有較佳的油耗表現。在廢氣部份，原ECU的操作條件下，因為空燃比效應的影響，CO最多改善88%，HC最多改善33%，但NOx的排放也增加了88%，如將空燃比控制在理論值時，則CO與HC排放差異不大，NOx則因為乙醇本身燃燒溫度較低的特性可使排放量有所減少。在燃燒分析的部份，因為乙醇本身有燃燒速度快的特性，在添加入汽油後，燃料E30與E0比較下點火延遲角改善9%，燃燒持續角改善5%。

關鍵字

機車引擎 ； 燃油噴射系統 ； 替代燃料

並列摘要

This paper used ethanol blended gasoline with1, 2, 5, 10, 20 and 30% ethanol for a four strokes, 125cc EFI motorcycle engine to test and verify the engine performance, fuel consumption , exhaust emissions and combustion analysis.
The experimental results indicated that ethanol blended gasoline with appropriate rate of ethanol can increase engine torque maximum 18% when partial load conditions and reduce fuel consumption when full load conditions.The exhaust emissions of CO and HC were reduced maximum 88% and 33% , respectively but 88% increasement of NOx emissions because of A/F ratio effect. Analysis of cylinder pressure data showed that E30 had slightly faster main burn rate and ignition delay than the E0 fuel. Not much differences were noticed when E10 was used in the engine. In conclusion, ethanol blended gasoline has the benefit for improvement volumetric efficiency and increase the engine torque due to the property of high latent heat. The exhaust emission characteristic is based on the A/F ratio effect by the content of ethanol in fuels.

並列關鍵字

motorcycle engine ； fuel injection system ； alternative fuels

參考文獻

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