近年來響應節能減碳,發展高效能且低污染的內燃機引擎已為重要目標,因此各車輛產業開始研發有關可變氣門正時來達成改善引擎效能。本研究設計一種利用對稱性雙永久磁鐵和電磁鐵之複合式新型電子氣閥,改善傳統雙E型線圈組需要通予大量電流吸附電樞之缺點,來大幅降低能量的消耗,達成節能減碳的目的。 本文之研究目的分為兩個部份,第一部分在於新型電子氣閥的動態模擬與緩接觸控制。經由氣閥動態模擬探討氣閥位移與速度之動態分析結果,並搭配磁路分析軟體了解相對應之磁力,做整個系統行程的模擬及設計控制策略,驗證在高轉速下電流驅控的可行性。此外,選用模糊控制做緩接觸控制之模擬,並提出低複雜度的簡易脈衝緩接觸控制方法。第二部分是關於平台架設以及驅控元件的建立,由位移感測器回授訊號作為輸入,給予控制器訊號輸出控制電流完成電子氣閥開啟及關閉,經由實驗結果獲得整體運作之性能,未來硬體架設上期盼可大幅提升引擎的性能。
For energy saving and carbon reduction in recent years, it is necessary to improve internal combustion engine for high efficiency and low pollution. Therefore, many vehicle industries began to research about improving the performance of internal combustion engines by variable valve timing (VVT). This study had designed a new electromagnetic valve by using both permanent magnet and electromagnet to improve the drawbacks of conventional double E-type coils electromagnetic valve. It effectively reduced energy consumption and carbon exhaust emission. The objective of this study is divided into two parts. The first part is to perform dynamic simulation and soft landing control. From the simulation results, the dynamic responses of valve displacement, valve velocity, and the corresponding force are analyzed and used to design controller. It verifies the feasibility of current driving at high engine speed by the designed control strategy. In addition, Fuzzy Control and simple pulse control algorithm are used for soft landing control. The second part is to establish the experimental platform and the corresponding driving elements. The feedback signals from the position sensors are used as system inputs to obtain output current from controller to achieve the opening and closing for electromagnetic valve. The results obtained by the experiments of the overall operation, hardware architecture would allows an expected increasing performance in the future.