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研究生:余乃婷
研究生(外文):Nai-ting Yu
論文名稱:HCCI柴油與煤油混摻二階段噴射其效能之探討
論文名稱(外文):The Effects of Two Stage Diesel and Kerosene Duel Injections on HCCI Engine Performance
指導教授:施國亮施國亮引用關係
指導教授(外文):Kou-liang Shin
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:機械工程系碩士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:中文
論文頁數:63
中文關鍵詞:HCCI柴油引擎雙燃料噴射煤油汙染排放
外文關鍵詞:Dual fuelHCCIDieselEngineEmissionKerosene
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本研究主要在於嘗試探討改裝後柴油共軌引擎,在進氣歧管架設一只噴嘴噴入煤油來探討對引擎性能之影響。探討對象主要是以CY190 1000C.C. 單缸直噴式柴油引擎為實驗載具,其中引擎操作噴油壓力於600bar,並固定柴油的當量比(Φd=0.2、0.3、0.4、0.5),以四個不同轉速(rpm=1500、1800、2100、2400)下來進行之實驗探討。探討雙燃料模式下噴入煤油,以改變煤油溫度與取代比例對引擎性能輸出與汙染排放與純噴入柴油的差異性。
實驗中將固定柴油噴射之當量比(Φd),並且改變預噴煤油的溫度與取代比例。本實驗是以等熱質的方法作為基準,且經由計算調整預噴煤油之噴油量與柴油之噴油量使其能量固定、總熱值不變。本實驗將分為三個部分:第一部分為於缸內直噴柴油,量取其引擎性能輸出及汙染;第二部分為雙燃料噴射模式,於歧管內預噴不同油溫 (30°、55°、80°,文中以TK=30、TK=55、TK=80表示)與不同取代比例(10%、15%、20%,文中以FK=10、FK=15、FK=20表示)之煤油,來探討性能及排汙之影響,找出最佳之煤油油溫與取代比例;第三部分為比較缸內直噴柴油與最佳之預噴煤油油溫與取代比例的引擎性能輸出及汙染排放之差異。
本研究結果發現雙燃料預噴煤油模式下,引擎扭力輸出有些微上升,因為預噴煤油所產生之預混情形,改善了傳統柴油引擎的缺點,減少了柴油引擎點火延遲的現象,但是汽缸內邊界層的油氣無法完全燃燒,使汙染排放物增加。實驗結果得知,預噴煤油比較缸內直噴柴油其扭力部分上升了13.54%~46.67%,對於HC的排放量上升了65.52%~492.69%,而CO的排放量上升了88%~421%,在Smoke的排放較為不穩定變動量從-54%~79%,對於CO2的排放上升了1.86%~20.55%,在NOX的排放下降了3.2%~31.6%。
The research studies the HCCI engine’s performance under the addition of a kerosene injection at the intake manifold. A 1000c.c. single cylinder traditional diesel engine was previously modified to a common rail system. The injection pressure is 600bars, The equivalence is varied (Φd=0.2、0.3、0.4、0.5), and the engine speed is selected (rpm=1500、1800、2100、2400). The kerosene injected amount and its temperature is varied to study its effect on the engine performance.
The varied kerosene injection amount and temperature in controlled under the same heating value basis. The research has three parts. Part I has the baseline diesel engine study. Part II has duel fuel injection with varied kerosene injection amount and fuel temperature. Part III compares the baseline the optimized kerosene auxiliary injection on the engine performance.
Under duel fuel injection the engine output is slightly increased. This may be caused by the kerosene injection’s pre-mixed combustion. However, the bulk fuel-air near the wall can’t be completed burnt so that the exhaust is increased. The torque is increased by 13.54%~46.67%, HC is increased by65.52%~492.69%, the CO is increased by 88%~421%, the smoke is varied by -54%~79%, the CO2 is increased by 1.86%~20.55%, and the NOX is reduced by 3.2%~31.6%
中文摘要
英文摘要
誌謝
目錄
表目錄
圖目錄
符號說明
第一章 緒論
1-1 前言
第二章 研究動機及研究背景
2-1 研究動機
2-2 研究背景與文獻回顧
2-3 研究目的
第三章 研究實驗與量測方法
3-1 實驗控制及量測設備
3-1-1 引擎數據量測設備
3-1-2 柴油引擎進氣與燃油系統
3-1-3 等能量(等熱值)燃料噴射之計算
3-1-4 燃燒室壓力量測系統
3-1-5 二階段預噴系統介紹
3-1-6 引擎廢氣排放濃度量測系統
3-2 高壓共軌供油系統
3-2-1 高壓油泵(High pressure pump)
3-2-2 柴油共軌(Common rail)
3-2-3 交流馬達(AC motor)
3-2-4 噴油嘴(Unit injector)
3-3 熱釋放
3-3-1 熱釋放計算公式
3-3-2 熱釋放率計算
3-4 實驗步驟與研究方法
第四章 研究結果與分析
4-1 一階段模式下缸內直噴柴油對於引擎性能及汙染之影響
4-2 二階段預噴煤油對柴油引擎性能及汙染之影響
4-2-1 二階段預噴射煤油對NOx排放之影響
4-2-2 二階段預噴射煤油對HC排放之影響
4-2-3 二階段預噴煤油對CO排放之影響
4-2-4 二階段預噴煤油對CO2排放之影響
4-2-5 二階段預噴煤油對Smoke排放之影響
4-2-6 二階段預噴射煤油對扭力之影響
4-2-7 二階段預噴射煤油對比燃油消耗率之影響
4-2-8 預噴煤油對柴油引擎燃燒壓力之影響
第五章 結論與未來展望
5-1 結論
5-2 未來展望
參考文獻
個人簡歷
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