運用引擎模擬分析改善引擎性能

Improving the Engine Performance with Application of Engine Simulation

林耿宏(Keng-Hung 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(2005年)

摘要

容積效率是影響引擎性能輸出大小的重要指標，而影響容積效率的主要因素為進、排氣系統的長度與設計方式，本論文主要以AVL BOOST模擬軟體分析不同進氣歧管長度對容積效率的影響，及不同排氣歧管型式之排氣脈波做一探討。
依據BOOST所建立之引擎模型架構，分別建立各種不同進氣歧管長度之模型，輸入相同空燃比、點火角度及汽門正時控制策略，探討在各轉速下容積效率與性能輸出的差異。研究結果顯示本實驗之引擎使用400mm進氣歧管可達到最佳容積效率，排氣系統方面，結果顯示四管匯成二管再匯成ㄧ管(4-2-1)的排氣歧管於排氣末期，汽門重疊時期不易產生排氣反射波，不會影響進氣效率，於動力計實驗測試結果，4-2-1排氣歧管型式比四管匯成ㄧ管(4-1)的排氣歧管型式性能有明顯改善提升。

關鍵字

引擎模擬 ； 容積效率 ； 引擎性能

並列摘要

Volumetric efficiency is the important indicator of engine performance. The main factors of volumetric efficiency are the lengths and configurations of intake and exhaust manifold systems. In this thesis, AVL BOOST simulation software is used to analyze how the above factors influence volumetric efficiency the factors include the length of intake manifold and the exhaust wave action which is caused by various configurations of exhaust manifold.
The effects of intake manifold length and exhaust manifold configuration on the volumetric efficiency are studied by engine simulation at first, and then the experimental work is performed to improve the engine performance according to the results of engine simulation. The engine has batter volumetric efficiency by using 400mm of intake manifold length. In the exhaust system, two configurations of exhaust manifold, four pipes converge to one pipe (4-1) and four pipes converge to two pipes and then converge to one pipe (4-2-1), are tested. The 4-2-1 manifold produces higher engine performance than the 4-1 manifold due to the wave action in the exhaust system.

並列關鍵字

Engine Simulation ； Volumetric Efficiency ； Engine Performance

參考文獻

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