汽車自動變速箱常見的有四種型式，分別是液力自動變速箱(簡稱AT)、機(jī)械無級自動變速箱(簡稱CVT)、電控機(jī)械自動變速箱(簡稱AMT)、DCT（雙離合自動變速箱Dual Clutch Transmission）。

　　There are four common types of automatic transmissions for automobiles, namely hydraulic automatic transmission (AT), mechanical continuously variable transmission (CVT), electronically controlled mechanical automatic transmission (AMT), and DCT (Dual Clutch Transmission).

　　AT不用離合器換檔，檔位少變化大，連接平穩(wěn)，因此操作容易，既給開車人帶來方便，也給坐車人帶來舒適。但缺點(diǎn)也多，一是對速度變化反應(yīng)較慢，沒有手動變速箱靈敏;二是費(fèi)油不經(jīng)濟(jì)，傳動效率低變矩范圍有限。

　　AT does not require a clutch to shift gears, with minimal gear changes and smooth connections, making it easy to operate and providing both convenience and comfort for drivers and passengers. But there are also many disadvantages. Firstly, it has a slow response to speed changes and is not as sensitive as a manual gearbox; Secondly, fuel consumption is uneconomical, with low transmission efficiency and limited torque range.

　　機(jī)械式無級自動變速箱的特點(diǎn)是變速比不是間斷的點(diǎn)，而是一系列連續(xù)的值，從而能更好地協(xié)調(diào)車輛外界行駛條件與發(fā)動機(jī)負(fù)載，可充分發(fā)揮發(fā)動機(jī)潛力，提高整車燃料經(jīng)濟(jì)性，它使汽車具有沒有漏洞的牽引性能，從而顯著地提高整車性能。

　　The characteristic of a mechanical continuously variable automatic transmission is that the transmission ratio is not a discontinuous point, but a series of continuous values, which can better coordinate the external driving conditions and engine load of the vehicle, fully tap the potential of the engine, improve the fuel economy of the whole vehicle, and make the car have flawless traction performance, thereby significantly improving the overall performance of the vehicle.

　　電控機(jī)械自動變速箱在傳統(tǒng)的手動齒輪式變速器基礎(chǔ)上改進(jìn)而來的，是綜合合了 AT(自動) 和 MT(手動)兩者優(yōu)點(diǎn)的機(jī)電液一體化自動變速器;AMT既具有液力自動變速器自動變速的優(yōu)點(diǎn)，又保留了原手動變速器齒輪傳動的效率高、成本低、結(jié)構(gòu)簡單、易制造的長處。

　　The electronic mechanical automatic transmission is an improved version of the traditional manual gear transmission, which combines the advantages of both AT (automatic) and MT (manual) in an electromechanical hydraulic integrated automatic transmission; AMT not only has the advantages of automatic transmission of hydraulic automatic transmission, but also retains the high efficiency, low cost, simple structure, and easy manufacturing advantages of the original manual transmission gear transmission.

　　雙離合器自動變速箱采用兩套離合器，通過兩套離合器的相互交替工作，來到達(dá)無間隙換擋的效果。DCT綜合了AT和AMT的優(yōu)點(diǎn)，傳動效率高、結(jié)構(gòu)簡單、生產(chǎn)成本較低，不僅保證了汽車的動力性和經(jīng)濟(jì)性，而且極大地改善了汽車運(yùn)行的舒適性。

　　The dual clutch automatic transmission adopts two sets of clutches, which work alternately to achieve seamless shifting. DCT combines the advantages of AT and AMT, with high transmission efficiency, simple structure, and low production cost. It not only ensures the power and economy of the car, but also greatly improves the comfort of car operation.

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