臺灣博碩士論文加值系統

傳統的可變氣門正時系統是採取分段可變式的氣門機構，其氣門正時為分段固定式，並無法完全依照引擎當時的運轉狀況提供適當的氣門正時；而利用電磁閥所組成的電子氣閥(electromagnetic valve)可以有效的改善此缺點，提供引擎各種需求下的氣門正時，並且各缸可以允許有個別不同的正時設定，可以有效提升引擎效能和降低燃油消耗率與減少引擎廢氣污染產生。
本研究主要方向為針對電子氣閥的結構所造成對氣閥作用力的影響做改良，提出新型電子氣閥結構設計，以期達到更良好的動態表現，並分析電子氣閥能量消耗，更能符合在實際應用上的目的。另一方面，本研究導出氣閥間隙的動態方程式，並建立模組來執行氣閥間隙動態模擬，分析氣閥間隙在電子氣閥機構中對閥體的影響與撞擊速度控制的重要性。

It is acknowledged that variable valve timing (VVT) can effectively enhance engine performance and significantly reduce engine fuel consumption and exhaust emission. Application of electromagnetic valve (EMV) in SI engines can effectively improve the problems of fixed valve timings and events in conventional cam-valve engines. EMV engines have much higher flexibility in valve timing than conventional engines. Valve timings of EMV engines can have different settings to satisfy different engine operating conditions and different cylinder conditions.
The main direction of this research, in order to improve the influences of the system holding force due to the structure of the electromagnetic valve causes . We propose the structural design of the new electromagnetic valve. To reach better dynamic behavior and analyze the energy consumption of the electromagnetic valve, hope it can fit in with the purpose in practical application even more. On the other hand, this research establishes the dynamic equations of the valve lash, to realize the dynamic simulation of valve lash. It also analyzes the influence of the structure and impact velocity control(soft landing) in the electromagnetic valve system of valve lash.

中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 3
1.3 文獻回顧 4
1.3.1 電子氣閥設計研究 5
1.3.2 間隙調整機構分類與設計 7
1.3.3 氣閥間隙動態模擬 9
1.4 研究方法與方向 10
1.5 論文大綱 10
第二章 電子氣閥構造與動態 12
2.1 電子氣閥構造與作動方式 13
2.2 電子氣閥動態模式 14
2.2.1 機械子系統 15
2.2.2 電子子系統 17
2.2.3 電磁子系統 18
2.3 彈簧力道分析 21
第三章 電子氣閥設計分析 23
3.1 傳統電子氣閥分析 23
3.2 新型電子氣閥設計概念 24
3.3 新型電子氣閥機構 27
3.3.1 電子氣閥機構作動示意 35
3.3.2 閥作用力計算 36
3.3.3 材料選擇 37
3.4 電子氣閥作用力分析 40
3.5 電流作動分析 52
第四章 電子氣閥氣閥間隙動態模擬 57
4.1 氣閥間隙概述 57
4.1.1 氣閥間隙文獻探討 58
4.2 氣閥間隙模擬條件設定 60
4.3 氣閥間隙模擬結果討論 62
4.4 電子氣閥能量消耗 66
4.4.1 能量消耗文獻探討 66
4.4.2 新型電子氣閥能量消耗 70
第五章 結論與未來展望 72
5.1 新型電子氣閥設計結論 72
5.2 氣閥間隙動態模擬結論 73
5.3 能量分析結論 73
5.4 未來展望 74
參考文獻 75
符號彙整 77

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