定軸式變速箱為配置於引擎與驅動輪之間的一種裝置，主要提供車輛不同的減速比，讓引擎在車輛增減速時可維持在一定的工作轉速範圍，並具有良好的傳遞性能，廣泛的應用在各種車輛的傳動系統中。本研究的目的在於針對汽車定軸式雙離合器自動變速箱建立一系統化設計方法的理論，以系統化的方式進行變速箱的構型設計、齒數設計、電腦輔助計算程式及具體化設計。本文首先介紹汽車定軸式雙離合器自動變速箱的基本組成與作動原理；其次提出一系統化的設計程序進行變速箱之設計，歸納變速箱減速比的設計範圍，建立汽車定軸式雙離合器自動變速箱的設計規格表；而後分別針對縱置式與橫置式雙離合器自動變速箱進行變速齒輪系的構造合成，設計出12型縱置式與8型橫置式七速雙離合器自動變速箱之構型，並對此二種構型分別進行齒數設計，建立電腦輔助計算程式介面；最後將設計成果具體化，建立構造模型，以利於汽車變速箱之設計。本研究之成果將有助於汽車定軸式雙離合器自動變速箱之創新設計。

　　The countershaft transmission is a device connected between engine and driving wheel for transferring power. This device can provide variable gear ratios to maintain engine speed in certain operating range and is well applied for vehicle transmission systems for its high performance. In this thesis, the systematic design methodology for dual-clutch countershaft automatic transmission (DCT) is proposed. This methodology can provide a systematic design procedure for the gear box prototype, number of teeth, computer-aid program and preliminary layout. First, the fundamentals and gear-shifting operations for DCT are illustrated to establish the design requirements. Secondly, 12 kinds and 8 kinds for 7-speed DCT prototype are synthesized for the gear mechanism with FR type and FF type respectively. Then, according to both FR and FF types, calculate the proper number of teeth for ideal gear ratio and build the computer-aided calculating interface. Finally, the preliminary layouts of the above prototypes and number of teeth are built by CAD models. The result of this research will be beneficial for further newly DCT designs.

摘要..........................................................................................I
英文摘要.................................................................................II
目錄........................................................................................III
圖目錄.....................................................................................V
表目錄....................................................................................IX
第一章 前言............................................................................1
1.1 文獻回顧......................................................................1
1.2 研究目的......................................................................4
第二章 基本概念....................................................................9
2.1 汽車變速箱的分類......................................................9
2.2 雙離合器自動變速箱之基本構造與作動原理........17
2.3 雙離合器自動變速箱之功能分析............................22
第三章 雙離合器自動變速箱之設計程序.........................25
3.1 系統化設計程序........................................................25
3.2 基本需求....................................................................29
3.2.1 雙離合器自動變速箱之評估項目...................29
3.2.2 變速箱減速比的選擇.......................................31
3.3 設計規格表................................................................44
第四章 雙離合器自動變速箱之構造合成.........................45
4.1 縱置式雙離合器自動變速箱之構造合成................45
4.2 橫置式雙離合器自動變速箱之構造合成................59
4.3 結語............................................................................72
第五章 電腦輔助齒數設計.................................................73
5.1 齒輪式變速箱之參數選擇........................................73
5.2 縱置式雙離合器自動變速箱之齒數設計................78
5.3 橫置式雙離合器自動變速箱之齒數設計................93
5.4 結語.........................................................................106
第六章 具體化設計...........................................................109
6.1 具體化設計流程.....................................................109
6.2 具體化結果.............................................................112
第七章 結論與建議...........................................................116
參考文獻............................................................................118

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