均質進氣壓燃式引擎自燃特性研究

Investigating of Auto-ignition on HCCI Engine

林育志(Yu-Jr Lin)

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(2008年)

摘要

隨著國際石油的上漲與環保意識的抬頭，各種車輛省能源低污染的技術不斷的被開發，而均質進氣壓縮燃燒引擎雖然可以符合上述要求，但卻還未被商品化，主因為引燃特性不易控制。
本研究將探討改變空燃比、改變進氣溫度、改變EGR比例對於引燃特性、缸內氣體溫度、排氣污染、引擎性能的影響。
實驗結果顯示，當空燃比變稀，會延遲引燃、降低NOx、CO幾乎為零、HC則是因為淬冷層變大的關係變多、引擎扭力略增、缸內氣體溫度也會下降。當進氣溫度增加，會加速引燃、NOx因為缸內氣體溫度增加而變多、CO幾乎為零、HC則是因為缸內氣體溫度增加而減少、引擎扭力有略降、缸內氣體溫度則是增加。當增加EGR導入比例，會延遲引燃、降低NOx、CO幾乎為零、HC則是因為缸內氣體溫度下降而增多、引擎扭力略增、缸內氣體溫度則是減小。

關鍵字

均質進氣壓縮燃燒引擎 ； 機車引擎 ； 引燃特性

並列摘要

The international petroleum price is getting higher and environmental protection is consciousness. The high efficiency and low emission technology is developed constantly. Although the homogeneous charge compression ignition engine could accord with these requirements. It has not been commercialized yet, because the control of ignition is difficiult.
The research discusses the ignition characteristic, in-cylinder gas temperature, emissions, engine performance by altering air-fuel ratio, intake temperature and EGR rate. The results show that lean air-fuel ratio causes ignition delay, low NOx and CO, but HC increased. The engine torque increased slightly and in-cylinder gas temperature reduced. When intake air temperature is increased, ignition advanced. The higher NOx and lower HC is caused by high in-cylinder gas temperature, engine torque decreased slightly. When EGR rate is increased, it will cause ignition delay. Low NOx and CO, but HC is increased because of lower in-cylinder gas temperature. Moreover, engine torque increased slightly and in-cylinder gas temperature reduced.

並列關鍵字

homogeneous charge compression ignition ； motorcycle engine ； ignition

參考文獻

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