臺灣博碩士論文加值系統

車輛產業近年來逐漸發展出各種環保的車輛技術，以因應節能減碳的環保要求。主要發展高效率、低耗能與低廢氣排放等相關技術，其中高自由度的連續可變氣門正時與升程系統為其中一種重要的技術選項。本研究開發一使用智慧型材料之新型磁流變液全可變氣閥(MRVVT)，該全可變氣閥透過電流控制，可使引擎具有連續氣門正時與升程可變，可取代傳統凸輪驅動氣門的設計。本研究分為三部分，第一部分利用磁路模擬分析軟體對該新型磁流變液全可變氣閥(MRVVT)進行磁路模擬；第二部分則進行磁流變液全可變氣閥之模擬，模擬結果顯示，該新型磁流變液全可變氣閥可提供極大自由度之氣門可變正時與可變升程，產生各種不同之扭力模式，提高整體引擎之燃油效率。
第三部分建立測試平台進行實體測試、數據分析，於實體加工、組裝實驗後證實本新型電子氣閥可因電流大小及啟閉時間達到連續可變氣門正時與升程，由實驗結果證明此新型磁流變液全可變氣閥技術將可建立低耗能高效率引擎。

Different eco-vehicle technologies have been developed for environmental protection in recent years. Among all the technologies for engine improvement, technology of variable timing and lift for cylinder valve is a potential one. This research studied cylinder dynamics of an engine equipped with a new full variable valve system (VVS) based on innovated magneto-rheological (MR) technology. This MR VVS inserted an MR valve block into conventional inlet valve. There are three sub-blocks in MR valve block: active block, magnetic plate block, and buffer block. By controlling current to MR magnetic plate, the MR fluid flowing into magnetic plate block is controlled. If cam presses upper valve rod, then MR fluid in active block presses low valve rod by different displacements. Therefore, many patterns of valve opening/closing can be obtained: full lift, multiple lift, late valve opening and so on. This research performed magnetic simulation for the new MR VVS to investigate the relationship among MR valve displacement, valve lift, and valve timing. Simulation results showed that the MR VVS provides high freedom of valve timing and lift for gasoline engine to produce different torque modes and high engine efficiency. The results confirmed the abilities of this MR VVS to become essential technique of high-efficiency engine.

摘 要 i
ABSTRACT ii
誌 謝 iv
目 錄 v
表目錄 viii
圖目錄 ix
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究動機與目的 11
1.4 論文架構與綱要 12
第二章 新型電子氣閥作動原理與設計分析 13
2.1 傳統電子氣閥作動原理 13
2.2 新型電子氣閥設計 15
2.3 作動原理 16
2.4電子氣閥之理論模式 16
2.5 尺寸設計 23
2.5.1 本體 24
2.5.2 本體上側蓋 26
2.5.3 本體下側蓋 26
2.5.4 本體右側蓋 27
2.5.5 活塞 28
2.5.6 導磁C型蓋 29
2.5.7 隔板 29
2.5.8 導磁通道與線圈 30
2.6 材料分析 30
第三章 新型電子氣閥之模擬分析 32
3.1電子氣閥尺寸模擬分析 32
3.1.1導磁通道長度 32
3.1.2導磁通道寬度 34
3.1.3磁流變液層 36
3.2 電子氣閥可變氣門正時 37
3.3 電子氣閥可變氣門升程 38
第四章 新型電子氣閥實驗測試、數據分析 41
4.1實體加工製做 41
4.2實驗設備 43
4.2.1阻抗力測試平台 43
4.2.2可變氣門正時與升程測試平台 44
4.3實驗方法及步驟 47
4.3.1阻抗力實驗 47
4.3.2氣門正時與升程實驗 48
4.4實驗結果與討論 48
4.4.1阻抗力實驗 48
4.4.2可變氣門升程實驗 49
4.4.3可變氣門正時實驗 56
4.4.4可變氣門正時與升程實驗 59
第五章 結論與未來展望 62
5.1 結論 62
5.2 未來展望 63
參考文獻 64
符號彙編 67

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