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研究生:賴德豪
研究生(外文):Lai De-Hao
論文名稱:直接噴射式共軌柴油引擎燃燒缸壓回饋噴油控制嵌入式系統之研究
論文名稱(外文):Cylinder Combustion Feedback Embedded Control System Study for Direct Injection Common Diesel Engine
指導教授:張一屏
指導教授(外文):Chang I-ping
口試委員:蔡耀文盧昭暉
口試委員(外文):Tsai Yao-WenLu Jau-Huai
口試日期:2014-07-18
學位類別:碩士
校院名稱:大葉大學
系所名稱:機械與自動化工程學系
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:2014
畢業學年度:102
語文別:中文
論文頁數:114
中文關鍵詞:直接噴射式共軌柴油引擎汽缸燃燒壓力、燃燒面積、燃燒斜率響應曲面方程式最佳噴油參數嵌入式設定
外文關鍵詞:Direct injection common rail diesel engine.Cyclinder combustion,Cyclinder area, Cylinder combustion pressure rate response surface function.Optimal embedded set fuel injection parameters.
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本研究之主旨為建立以燃燒缸壓訊號回饋調整直接噴射式共軌柴油引擎嵌入式噴油控制系統之方法。 因柴油引擎空燃比混合氣為稀薄燃燒,無法使用一般含氧感知器得知噴油狀況,所以本研究藉由分析汽缸燃燒壓力訊號以調整噴油壓力與噴油正時,以即時改善引擎輸出扭力及汙染廢氣排放。
實驗藉由量測三種不同引擎轉速在相同負載下之變化,使用燃燒分析儀擷取出柴油在汽缸內所燃燒的平均壓力波形數據。 利用Matlab/Simulink○R建立分析汽缸燃燒壓力模組,將數據代入此模組分析出三種燃燒壓力參數燃燒壓力波形斜率、燃燒面積及淨熱釋放率。 將量測出的引擎性能數據代入實驗設計統計分析軟體STATISTICA○R畫出性能響應曲面及汽缸燃燒壓力響應曲面方程式。 代入最佳化程式可計算出不同引擎性能要求下,引擎管理系統之最佳噴油參數,此外亦可從響應曲面看出汽缸燃燒壓力、噴油參數與引擎性能之關係。 將最佳化噴油參數嵌入式設定之值代入響應曲面方程式即可算出三種燃燒參數之值,藉由不同的燃燒壓力參數調整需要之噴油參數設定。
實驗設計分析結果顯示於設定測試工作狀態範圍下,於汽缸燃燒壓力較大時,實驗量測對應引擎扭力輸出較大,但汙染廢氣排放則會相對較高。 此時可延後噴油正時或減少噴油壓力以降低汙染廢氣排放量,汽缸壓力較小時則反之。
The main purpose of this study is to establish cylinder combustion feedback fuel injection embedded control system for direct injection common rail diesel engine. The oxygen sensor can’t used in feedback control in diesel engine due to its lean combustion. In order to get the proper feedback signals for the fuel injection control, this study uses the measured cylinder combustion pressure to adjust the fuel injection pressure and timing to improve engine output torque and emissions.
The combustion analyzer was used to capture the diesel combustion ensemble averaged cylinder pressure data for three different engine speeds under same load. The experimental data were analyzed by the combustion pressure module built by Matlab / Simulink○R, which can analyze the combustion pressure wave slope, combustion area and net heat release rate. Engine performance and cylinder combustion pressure response surface functions under different engine operating conditions were found by the Design Of Experiment, (DOE) statistical analysis software STATISTICA○R. The DOE optimization program calculates the optimum performance fuel injection parameters, and their corresponding cylinder combustion pressure parameters from these response surface functions. The optimum fuel injection parameters for different engine performance can then be embedded set in the Engine Management System (EMS). From the response surface functions one can also observe the correlations between the engine performance parameters and cylinder combustion parameters with the same fuel injection parameters set. The needed adjustments from the fuel injection parameters can then be correlated to the cylinder pressure measurements and the engine performance required.

Results from DOE showed that when the larger combustion peak pressure in the cylinder was observed, the engine output torque became larger, emissions showed relatively higher for the chosen operating conditions. It showed also that by using less injection pressure or retard the injection timing can improve torque and reduce emissions, while if cylinder combustion pressure became lesser, then fuel injection pressure should be increased and the fuel injection timing can be set more advanced.
封面內頁
簽名頁
中文摘要 iii
ABSTRACT v
誌謝 vii
目錄 viii
圖目錄 x
表目錄 xvi
符號說明 xvii

第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 3
1.2.1 柴油引擎汽缸壓力變化模型及燃燒模擬相關文獻 3
1.2.2 燃燒壓力模組回饋之相關文獻 7
1.2.3 柴油高壓共軌柴油引擎實驗相關之文獻 11
1.3 研究動機 15
1.4 本文架構 15
第二章 研究方法 16
2.1 實驗狀態點選定 17
2.2 建立分析汽缸燃燒壓力曲線模組 17
2.2.1 汽缸壓縮體積模組 18
2.2.2 四行程引擎燃燒分析模組 19
2.2.3 汽缸燃燒壓力曲線模組 20
2.3 汽缸壓力量測 21
2.4 建立燃燒參數響應曲面 21
2.5 建立汽缸燃燒壓力參數與噴油參數之關係 21
2.5.1 柴油引擎燃燒 [23] 22
2.5.2 燃燒壓力圖參數 25
2.6 多目標性能功效係數最佳化搜尋 26
2.7 實驗儀器與設備 29
第三章 柴油引擎燃燒壓力性能分析 37
3.1 汽缸燃燒壓力參數量測 37
3.2 1500rpm 80Nm 汽缸燃燒壓力分析 38
3.3 1750rpm 80Nm 汽缸燃燒壓力分析 58
3.4 2250rpm 80Nm 汽缸燃燒壓力分析 78
第四章 變轉速定扭力噴油參數探討 98
4.1 定負荷不同轉速之噴油參數比較 98
4.2 最佳化之燃燒參數 101
第五章 結論與建議 107
5.1 結論 107
5.2 建議事項與未來研究項目 110
參考文獻 111
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