| 研究生: |
歐東哲 Ou, Dung-Je |
|---|---|
| 論文名稱: |
柴油引擎於進氣處使用輔助燃料噴射之運轉性能及排氣污染效應之研究 Study of Operating Performance and Exhaust Emissions for Diesel Engines with Auxiliary Fuels Injected at the inlet port |
| 指導教授: |
吳鴻文
Wu, Horng Wen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 系統及船舶機電工程學系 Department of Systems and Naval Mechatronic Engineering |
| 論文出版年: | 2007 |
| 畢業學年度: | 95 |
| 語文別: | 中文 |
| 論文頁數: | 109 |
| 中文關鍵詞: | 實驗分析 、燃燒性能 、密閉式循環柴油引擎系統 、均質壓燃式引擎 |
| 外文關鍵詞: | combustion performance, close cycle diesel engine, homogeneous charge compression ignition, experimental analysis |
| 相關次數: | 點閱:86 下載:1 |
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為了環保需求以及面對能源危機,進行能源系統的改良工作刻不容緩。柴油引擎乃是提供多數陸上以及海上動力的來源。如果將排放廢氣中的二氧化碳濃度降低,柴油引擎就可以形成一個密閉循環系統(CCDE)。均質壓燃方式(HCCI)可以提高直噴式柴油引擎的熱效率與降低污染物的生成。如果將HCCI和CCDE兩大系統結合,利用HCCI方式能夠降低污染物的特性,來提升CCDE系統的運轉壽命。
本文針對KUBOTA RK-125 型之單缸直噴式柴油引擎進行實驗,利用不同的實驗參數,進行不同預混合比之進氣對均質壓燃式柴油引擎燃燒性能分析。在不同的預混合燃氣及組成分率下,量測氣缸內的爆發壓力,以及排放的各項污染濃度, 並計算其熱釋放率,將實驗所的結果和數值模擬做比較。
本研究已成功的將柴油引擎之進氣過程導入汽油、乙醇以及甲醇燃氣,並且進行穩定的柴油實驗。實驗的結果顯示甲醇之預混合燃氣所排放的各項污染濃度除了一氧化碳外均為最低。未來期許本實驗之結果,對HCCI方式安裝在密閉式循環柴油引擎系統有參考價值。
In order to demand environment protection and face to energy crisis, the process of improving the energy system is urgent. Diesel engines can be generally applied to the power source for the vehicles on land and boats at sea. If we can reduce CO2 of the exhaust, a diesel engine can be a closed cycle system (CCDE). A homogeneous charge compression ignition (HCCI) method can enhance the thermal efficiency of a DI diesel engine and reduce the formulation of pollutant. If we apply a HCCI method to the CCDE system, we could use the characteristic of HCCI that can reduce pollutant so as to increase the life of CCDE system.
This article is aimed at the KUBOTA RK-125 which is a single cylinder direct injection diesel engine and conducts an experiment. We use different experimental parameters to analyze the combustion performance of a homogeneous charge compression ignition engine with different of premixed ratios of intake premixed gas and its contents. The pressure in cylinder, exhaust emissions, and computation heat release rate of engine are measured at different composition fractions of intake premixed gas, and then the results between the experiment and simulation will be compared.
The research has already implemented the fuels of gasoline, ethanol and methanol successfully in the intake process, and carries out a stable diesel engine experiment. Experimental results show that the premixed gas of ethanol has the lowest exhaust emissions except for CO . The experimental results in this research are expected to be a reference value when the close cycle diesel engine system installs with the HCCI method in the future.
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