自動變速器（簡稱DCT）是基于手動變速箱發展而來的。它的工作原理是通過集成電子和液壓元件的機械電子模塊來實現換擋和離合操作，而不是通過離合器踏板。與手動變速箱不同，DCT中的兩幅離合器與二根輸入軸相連。

Automatic transmission (DCT) is developed based on manual transmission. Its working principle is to achieve gear shifting and clutch operation through a mechanical electronic module that integrates electronic and hydraulic components, rather than through the clutch pedal. Unlike manual transmissions, the two clutches in DCT are connected to two input shafts.

駕駛員可以選擇手動換擋或將變速桿處于全自動D擋（舒適型，在發動機低速運行時換擋）或S擋（任務型，在發動機高速運行時換擋）。在這種模式下，換擋通常由擋位和離合執行器實現。兩幅離合器各自與不同的輸入軸相連。例如，離合器1通過實心軸與擋位1、3、5相連，離合器2則通過空心軸與擋位2、4、6和倒擋相連。這種變速箱形式有兩組離合器，一個控制1、3、5擋，另一個控制2、4、6擋。使用一擋的時候，二擋已經準備好，因此換擋時間大大縮短，沒有延時。

The driver can choose to manually shift gears or shift the gear lever to fully automatic D gear (Comfort type, shifting when the engine is running at low speeds) or S gear (Task type, shifting when the engine is running at high speeds). In this mode, shifting is usually achieved by gear and clutch actuators. The two clutches are connected to different input shafts. For example, clutch 1 is connected to gears 1, 3, and 5 through a solid shaft, while clutch 2 is connected to gears 2, 4, 6, and reverse through a hollow shaft. This type of gearbox has two sets of clutches, one controlling 1st, 3rd, and 5th gears, and the other controlling 2nd, 4th, and 6th gears. When using first gear, second gear is already ready, so the shifting time is greatly reduced without any delay.

總的來說，自動變速器的工作原理是通過集成電子和液壓元件的機械電子模塊來實現換擋和離合操作，與手動變速箱不同，駕駛員可以選擇不同的擋位模式，以適應不同的駕駛需求。

Overall, the working principle of an automatic transmission is to achieve shifting and clutch operations through a mechanical electronic module that integrates electronic and hydraulic components. Unlike manual transmissions, drivers can choose different gear modes to adapt to different driving needs.

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