氫氣對汽油引擎之性能影響研究

Effect of Hydrogen on Gasoline Engine Performances

蔡忠憲(Jhong-Sian Tsai)

指導教授 ： 吳澤松

崑山科技大學/工程學院/機械工程研究所/碩士(2012年)

摘要

本研究使用質子交換膜氫氣產生機，進行汽油引擎的除碳、助燃以及引擎污染排放之研究探討；期待提升車輛性能、降低車輛排氣汙染，並嘗試增加氫能替代燃料使用的可行性。
實驗計畫規劃為兩階段。第一階段將改裝汽油引擎進氣系統並與氫氣製造機銜接，利用導入氫方式清除燃燒室的積碳，第二階段則依引擎不同的負載條件下，導入不同比例氫以混合燃燒其測試結果並執行紀錄。
實驗結果顯示，積碳經過燃料加氫產生的高溫燃燒情形下，能夠有效清除表面積碳，且在除碳完後，各種廢氣排放皆比原始汽油來的低。引擎性能方面，由於氫氣能使引擎缸內燃燒較完全，燃燒效率變好，所以燃燒壓力、制動馬力會隨著氫氣導入量增加而增加，但在高負荷時的效果較差。廢氣排放方面，在低轉速低負荷時，容易因為混合汽過濃導致燃燒不完全，廢氣排放增加。隨著轉速提高，進氣量增加後，CO、HC、NOx下降，CO2上升。而在重負載高轉速時，燃燒間隔縮短，氫氣無法和空氣進氣充分做預混合，導致燃燒效率變差，CO、HC、NOx上升，CO2下降。

關鍵字

氫氣 ； 氫氣產生機 ； 輔助燃料 ； 引擎試驗

並列摘要

In this study, the proton exchange membrane hydrogen generator was used to carbon reduction and combustion added for gasoline engine and reducing engine pollutant emissions. In order to enhance vehicle performance and reduce exhaust pollutants, the hydrogen was added to engine as an auxiliary fuel.
The experimental projects were planning at two steps. The first step was modified gasoline engine intake system and convergence with the hydrogen manufacturing machine, induction hydrogen to clean the combustion chamber carbon deposits. The second step was induct different proportions of hydrogen/gasoline mixture, the combustion characteristics were recorded and engine was operated at different engine load conditions.
Experimental results show that the deposit was burned after higher temperature combustion, the surface carbon deposit were removed. The emissions were also lower than the original gasoline. For engine performance tests, the combustion pressure and brake horse-power were increase for increasing the amount of hydrogen induction. For emissions tests, the emission was increased at low speed and low load for incomplete mixing. As engine speed increased,hydrogen feed rate was increased, CO, HC, NOx, were then reduced. At high load and high speed conditions, the CO, HC, NOx were increased and CO2 was decreased.

並列關鍵字

Hydrogen ； Hyrogen Generators ； Auxiliary Fuel ； Engine Test

參考文獻

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