油水乳化燃料對機車引擎之影響

Effects of Emulsified Fuels on Motorcycle Engine

陳政安(Cheng-An 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(2006年)

https://doi.org/10.6841/NTUT.2006.00168

摘要

台灣第五期機車排氣污染法規將在2007年7月1日開始實施，其中CO及HC的標準值在四行程機車上並不難達到，但要符合NOx的排放標準將會是一大挑戰。前人已有許多將水噴入引擎燃燒室中降低NOx排放量之研究，但這類研究多以柴油引擎為主，汽油引擎方面相當少，機車引擎上更是罕見。
本研究將95 無鉛汽油與純水調配成含水量為5%、10%及15%的油水乳化燃料，應用到一單缸四行程氣冷式125cc引擎上，就是利用水的潛熱(Latent Heat)來降低燃燒溫度，進而減少NOx。
實驗結果顯示，適當比例的油水乳化燃料，可以改善引擎扭力，降低耗油率，大幅減少NOx和CO的排放量。使用含水10%的油水乳化燃料時，扭力提升5.02%，CO改善35.2%，NOx改善30.6%。但因為純水及乳化劑都是不利於燃燒的物質，因此會使HC上升，而當含水量為15%時，因為太多水而降低燃燒速度，進而減少引擎扭力並且使排氣溫度上升。

關鍵字

NOx ； 機車引擎 ； 乳化燃料

並列摘要

The 5th stage motorcycle emission regulation of Taiwan will start from July 1, 2007. The CO and HC are not difficult to meet, but the standard of NOx is a great challenge. This paper used gasoline/water emulsions with 5, 10, and 15% water for a four strokes, 125cc motorcycle engine to reduce NOx emission.
The experimental results indicated that emulsified fuel with appropriate rate of water can increase engine torque and reduce fuel consumption. The exhaust emissions of NOx and CO were significantly reduced. When use gasoline/water emulsions with 10% water, Engine torque increase 5.02%, CO decrease 35.2%, NOx decrease 30.6%, but the HC emissions was increased. The emulsified fuel with 15% water is the worst case due to too much water in the fuel. The exhaust temperature is increased and the engine torque is decreased due to slow combustion rate.

並列關鍵字

NOx ； motorcycle engine ； emulsified fuel

參考文獻

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