機車引擎動力系統容差分析｜國立臺灣科技大學博碩士論文系統

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研究生：	周祖詮 Tsu-chuan Chou
論文名稱：	機車引擎動力系統容差分析 Tolerance Analysis of the Power System for Motorcycle Engine
指導教授：	鄧昭瑞 Geo-ry Tang
口試委員:	修芳仲 Fang-jung Shiou 郭進星 Chin-hsing Kuo
學位類別：	碩士 Master
系所名稱：	工程學院 - 機械工程系 Department of Mechanical Engineering
論文出版年：	2011
畢業學年度：	99
語文別：	中文
論文頁數：	63
中文關鍵詞：	引擎、動力系統、壓縮比、容差分析、容差分配
外文關鍵詞：	engine, power system, compression ratio, tolerance analysis, tolerance allocation
相關次數：	點閱：203 下載：7
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上一筆

本研究探討機車引擎動力系統關鍵尺度及壓縮比可能的變異。研究中推導活塞在上、下死點與周邊間隙尺度鏈及壓縮比的數學關係式。因壓縮比是非線性問題，本研究以近似的線性尺度鏈作為容差估算之依據。研究中利用Excel工具建立最差法及統計法容差分析資料表，以探討各獨立尺度對導出尺度的影響。研究結果發現，適度地調整動力系統零件之公稱值，可確保動力系統上、下死點間隙在安全範圍內。此外，微幅放寬部份尺度的容差也可降低製造不良率及成本，並確保壓縮比容差在規格內。

This thesis examines the variations of critical dimensions and compression ratio of a motorcycle engine. The dimension chains for compression ratio, the clearances as the piston on the top dead center and bottom dead center are derived. Because the compression ratio involves in a nonlinear function of independent dimensions, a linearized dimension chain is used to estimate the tolerance of the derived variable. Excel tables are employed to record the data for tolerance analysis based on the worst case method and statistical method. his work investigates the influences of the tolerance of independent dimensions on the variation of the derived dimensions. The results of this study suggests that the nominal value of some particular dimensions may be modified. In addition, slightly increasing the tolerance of the components of power system can reduce the manufacturing cost but the assembly still meets the functional requirement.

摘要.................................................................................................................Ⅰ
Abstract...........................................................................................................Ⅱ
誌 謝...............................................................................................................Ⅲ
目 錄.............................................................................................................. Ⅳ
圖索引.............................................................................................................Ⅵ
表索引.............................................................................................................Ⅷ
符號說明.........................................................................................................Ⅸ
第一章	緒論.....................................................................................................1
1.1 研究方法.............................................................................................2
1.2 文獻探討.............................................................................................3
1.3 本文架構.............................................................................................5
第二章	四行程機車引擎作動原理.................................................................6
2.1  汽油引擎動力系統構造介紹...........................................................6
2.2  四行程引擎的動作...........................................................................9
2.3  壓縮比對燃燒效率的影響.............................................................11
第三章  容差分析.........................................................................................12
3.1 容差概論...........................................................................................12
3.2 常態分佈.................................…......................................................14
3.3 製程能力分析...................................................................................15
3.4 尺度鏈...............................................................................................17
3.5 容差分析的方法...............................................................................19
3.6 關鍵尺度之容差分析.......................................................................20
3.6.1  上死點間隙...........................................................................21
3.6.2  下死點間隙...........................................................................27
3.6.3  壓縮比........................................….......................................31
第四章  設計變更.........................................................................................41
4.1 上死點間隙.......................................................................................41
4.2 下死點間隙.......................................................................................43
4.3 壓縮比...............................................................................................45
第五章  結論與未來展望.............................................................................50
參考文獻.........................................................................................................52
附錄A 汽缸墊片厚度量測............................................................................54
附錄B 汽缸頭燃燒室及活塞容積量測........................................................58
附錄C 壓縮比靈敏度推導............................................................................62
作者簡介.........................................................................................................62
授 權 書.........................................................................................................63

                                

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