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研究生:莊豐瑞
研究生(外文):Chuang, Fong-Jui
論文名稱:使用E85燃料引擎管理系統之適應性研究
論文名稱(外文):Adaptive Study on An Engine ManagementSystem Using E85 Ethanol-gasoline Fuel
指導教授:鐘證達鐘證達引用關係
指導教授(外文):Cheng-Ta Chung
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:機械與機電工程研究所
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:2009
畢業學年度:97
語文別:中文
論文頁數:88
中文關鍵詞:引擎管理系統λECME0E85
外文關鍵詞:Engine Management SystemλECME0E85
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本論文主要在混合使用E0和E85兩種燃料對於引擎運轉情況差異與引擎管理系統(engine management system)參數調整之適應性研究,測試之引擎乃採用NISSAN MR20DE型式、電子式燃油噴射系統,利用λ為參數,做為引擎控制模組(ECM)燃油比例演算法感知器,計算當前燃油之乙醇含量,優化引擎管理系統。
亦當使用E0燃料之車輛,添加E85燃料,將使得λ偏離正確值,而位在貧油範圍,欲達到正確狀態,λ值必須升高(噴油時間增濃),重算函數同時從14.7降為一個較低值(最低值是9.8)。這樣一直到重算函數是燃油當前乙醇含量一個尺度。14.7表示純汽油,而9.8表示乙醇含量為85%。因此使用E0與E85雙燃料之適應方法,可以運用ECM檢查λ調節,並且分析零點之位置,以便確定燃油當前乙醇含量。
實驗結果顯示使用E85燃料時,CO濃度明顯減少30~70%﹔CO2濃度受到噴油增量影響,排放濃度較E0燃料增加4~20%,但隨著噴油時間減少使得CO2濃度有下降趨勢﹔HC排放量因熱值、噴油增量、原廠設定參數(點火時間)等影響,引擎性能輸出欲達到E0燃料表現,使得E85燃料之HC排放濃度明顯偏高。
The article is mainly aimed at the research of the differences of engine operation in use of hybrid E0 and E85 fuels and the adaptability of parameter adjustment for the engine management system; the engine applied for test is NISSAN MR20DE model with electronic fuel injection system that utilizes λ as the parameter to enable the engine control module (ECM) fuel proportion algorithm sensor calculating the ethanol content in the current fuel in order to optimize the engine system.
Furthermore, when the vehicle using E0 fuel is poured with E85 fuel, it makes λ deviated from the correct value and therefore located in the lean range; if intend to attain the correct status again, λ value must be raised (increase of injection time), re-account the function parameter to have it dropped from 14.7 to a much lower value(the minimum is 9.8). Repeat the action until the function parameter to be a criterion of the ethanol content in the current fuel. 14.7 indicates pure gasoline while 9.8 means ethanol content is 85%. As being the instance, the adaptation of applying E85 and E0 hybrid fuels can be fulfilled by utilizing ECM check for λ adjustment, and analyzing the location of zero point in order to verify the ethanol content in the current fuel.
The result from the experiment shows that when E85 fuel is applied, the concentration of CO is apparently decreased by 30~70%﹔at the same time, the concentration of CO2 is influenced by the increase of injected oil, the way the consistency of its emission is increased by 4~20% in comparison with E0 fuel. However, following the time of injected oil reduced, the concentration of CO2 is inclined drop-down. And in regard of HC emission, due to the effects of thermal value, increase of injected fuel, and the original set parameter (ignition time), etc., if the engine function output is to reach the same level as E0 fuel performs, it is necessary to have the consistency of HC emission by E95 fuel obviously
enhanced.
中文摘要...........................................i
ABSTRACT...........................................ii
致謝.............................................. iv
目錄 ...........................................v
表目錄............................................ viii
圖目錄.............................................ix
符號說明 ..........................................xi
第一章 緒論 .....................................1
1.1 前言......................................1
1.2 研究動機與目的.................................2
1.3 研究方法.......................................3
1.4 研究範圍與限制.................................4
1.5 本文架構.......................................5
第二章 文獻回顧...................................6
2.1 石油的起源與汽油煉製方式..................6
2.2 乙醇燃料發展近況及特性.........................8
2.3 乙醇混合燃料對引擎性能的影響...................11
2.4 火花點火燃燒對廢氣排放之成因..............13
2.4.1 一氧化碳之成因......................14
2.4.2 碳氫化合物之成因....................16
2.4.3 二氧化碳之成因......................17
2.5 含氧感知器(λ)之適應分析........................18
2.5.1 含氧感知器構造與原理................18
2.5.2 引擎性能影響........................19
第三章 實驗原理與設備.............................21
3.1 理論分析與性能參數.............................21
3.1.1 空氣燃料當量比(ψ)............................21
3.1.2 理論空燃比與實際空氣過剩率(λ)之計算..........22
3.1.3 制動單位燃料消耗率...........................25
3.1.4 引擎輸出扭矩與功率(P)........................26
3.2 實驗設備.......................................27
3.2.1 實驗用燃料..........................28
3.2.2 實驗環境條件.................................29
3.3 引擎系統..................................29
3.3.1 引擎系統基本架構....................29
3.3.2 引擎系統局部修改....................31
3.4 動力量測系統..............................35
3.4.1 終端電腦設備.................................35
3.4.2 引擎動力計..........................36
3.4.3 燃油計量供給系統....................37
3.4.4 冷卻水溫控系統......................38
3.4.5 廢氣量測儀器........................39
3.5 實驗步驟與方法............................40
第四章 實驗結果與分析.............................43
4.1 噴油時間對污染排放之分析探討 .............44
4.1.1 E85燃料燃燒後CO排放之探討...........44
4.1.2 E85燃料燃燒後HC排放之探討...........46
4.1.3 E85燃料燃燒後CO2排放之探討..........49
4.1.4 E85燃料燃燒後O2含量之探討...........51
4.1.5 燃料燃燒後λ值之探討.................53
4.2 噴油時間對引擎性能之影響探討..............55
4.2.1 燃油熱能消耗之分析探討.......................55
4.2.2 引擎最大功率與扭矩之探討............57
第五章 結論.......................................61
5.1 結論與建議................................61
5.2 未來發展..................................62
參考文獻...........................................63
附錄 A﹕E0與E85燃料之實驗數據......................67
附錄 B﹕NISSAN MR-20DE引擎規格及控制系統.......72
附錄 C﹕BOSCH ETT 008.55型廢氣分析儀規格.......80
EXTENDED ABSTRACT..................................82
簡 歷..............................................88
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