現有引擎大多採用曲柄滑塊機構設計，由於受到此機構運動限制，而難以獲致具有較佳燃料效率之活塞運動曲線。為提升燃料效率，許多可設計活塞曲線之引擎機構被提出，但大多具有機構複雜、體積過大等缺點，而無實際應用價值。共軛凸輪引擎機構結合共軛凸輪與曲柄滑塊機構，可彈性調整活塞運動曲線，滿足設計之要求，並具有桿件數少、機構剛性高等優點。
本研究為針對共軛凸輪引擎機構建立完整設計與分析程序。首先，對共軛凸輪引擎機構進行運動分析，以剛體轉置法合成凸輪輪廓，並針對凸輪壓力角與曲率半徑等幾何特徵進行分析。接續進行共軛凸輪機構剛體運動分析，建立完整設計與分析程序。最後進行實例設計與分析，並從實驗中進行觀察，驗證所建立之設計與分析程序。

Due to the kinematic limitation of slider-crank mechanisms used in traditional internal combustion engines, such devices driven by their piston motions have a difficulty to reach the better fuel efficiency. In order to make the fuel efficiency better, many engine mechanisms that can be tuned to obtain desired piston motions have been proposed. Since most of the proposed engine mechanisms have complex linkages and bulky size, they become impractical for real applications. The design of a conjugate cam engine mechanism containing a conjugate cam with a slider crank mechanism can be conveniently tuned to produce a desired piston motion in consideration of a limited space, weight, and the number of linkages.
The aim of this research is to set up a systematic design and analysis procedure for conjugate cam engine mechanisms. First of all, the kinematic analysis of conjugate cam engine mechanisms is performed based on the rigid body transformation method to determinate the conjugate cam profiles. Then, the geometric properties including the pressure angle and radius of curvature are investigated. Also, in order to characterize the rigid body dynamic behavior of the mechanism, the Newton’s Law is used to derive equations of motion. Finally, it is conducted to design and analyze a real system, and observe the real condition from the experiment to prove the theory is correct.

摘要 i
ABSTRACT ii
目錄 iii
圖目錄 v
表目錄 vii
符號表 viii
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 共軛凸輪引擎機構 5
1.4 研究目的與方法 8
1.5 論文架構 10
第二章 共軛凸輪引擎機構運動分析 11
2.1 曲柄滑塊機構運動分析 11
2.2 共軛凸輪機構運動分析 13
2.3 幾何分析 18
2.3.1曲率半徑 18
2.3.2 壓力角 20
第三章 共軛凸輪引擎機構動力分析 22
3.1 共軛凸輪引擎機構做動分析 22
3.2 共軛凸輪引擎機構運動分析 23
3.2.1 曲柄滑塊機構質心運動分析 23
3.2.2 共軛凸輪等效四連桿運動分析 25
3.3 共軛凸輪引擎機構動力分析 27
3.4 凸輪滾子壽命計算 31
3.5 共軛凸輪引擎機構動力輸出特性分析 33
3.5.1 曲柄滑塊機構機械利益 34
3.5.2 擺臂式凸輪機構機械利益 36
第四章 設計實例與驗證 39
4.1 活塞曲線選定 39
4.2 實例機構運動分析與共軛凸輪外廓求取 42
4.3 實例機構動力分析 50
4.4 引擎機構實驗量測 54
第五章 結論 58
參考文獻 59
附錄 61
附錄一 接觸應力分析 61
附錄二 機構桿件尺寸選取 63

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