1. Working Principle of Dual Clutch Automatic Transmission雙離合自動(dòng)變速器（簡(jiǎn)稱(chēng)DCT）基于手動(dòng)變速箱基礎(chǔ)之上。而與手動(dòng)變速箱所不同的是，DCT中的兩幅離合器與二根輸入軸相連，換擋和離合操作都是通過(guò)一集成電子和液壓元件的機(jī)械電子模塊來(lái)實(shí)現(xiàn)。而不再通過(guò)離合器踏板操作。就像tiptronic液力自動(dòng)變速器一樣，駕駛員可以手動(dòng)換擋或?qū)⒆兯贄U處于全自動(dòng)D擋（舒適型，在發(fā)動(dòng)機(jī)低速運(yùn)行時(shí)換擋）或S擋（任務(wù)型，在發(fā)動(dòng)機(jī)高速運(yùn)行時(shí)換擋）模式。此種模式下的換擋通常由擋位和離合執(zhí)行器實(shí)現(xiàn)。兩幅離合器各自與不同的輸入軸相連。如果離合器1通過(guò)實(shí)心軸與擋位1、3、5相連，那么離合器2則通過(guò)空心軸與擋位2、4、6和倒擋相連。 雙離合變速箱通俗的說(shuō)就是，這種變速速箱形式就有兩個(gè)離合器，一個(gè)控制1、3、5檔，一個(gè)控制2、4、6檔。使用一檔的時(shí)候二檔已經(jīng)準(zhǔn)備好了，同理，所以換檔時(shí)間大大縮短，沒(méi)有延時(shí)。

　　Double clutch automatic transmission (DCT) is based on manual transmission. Unlike manual gearbox, two clutches in DCT are connected with two input shafts. Shifting and clutch operation are realized by a mechanical and electronic module which integrates electronic and hydraulic components. And no longer through the clutch pedal operation. Just like tiptronic automatic transmission, drivers can shift gears manually or in full automatic D-shift (comfortable, shifting at low speed) or S-shift (task, shifting at high speed) mode. Shifting in this mode is usually achieved by gear and clutch actuators. The two clutches are respectively connected with different input axes. If clutch 1 is connected to gear 1, 3 and 5 through solid axis, then clutch 2 is connected to gear 2, 4, 6 and reverse through hollow axis. Dual clutch gearbox is commonly said that this form of gearbox has two clutches, one control 1, 3, 5 gear, one control 2, 4, 6 gear. When using the second gear, the second gear is ready, the same is true, so the shift time is greatly shortened and there is no delay.

　　2、市面上常見(jiàn)的幾種雙離合自動(dòng)變速器形式：

　　2. Several common types of dual clutch automatic transmission on the market:

　　大眾：DSG雙離合器變速箱

　　Volkswagen: DSG Dual Clutch Gearbox
                    

　　很多國(guó)人對(duì)于雙離合變速器的認(rèn)識(shí)也是從DSG開(kāi)始。當(dāng)然，大眾的“雙離合”也是比較有代表性的，旗下大部分進(jìn)口車(chē)也都配有DSG，如高爾夫GTI，EOS，邁騰和尚酷等。 大眾EOS采用的就是DSG雙離合變速箱不過(guò)，現(xiàn)今大眾其實(shí)共有兩款DSG雙離合變速器，在大眾內(nèi)部代號(hào)分別為DQ250和DQ200，從直觀數(shù)據(jù)上分析，代號(hào)DQ250的DSG有六個(gè)擋位，能承受較大扭矩為350NM，主要用于高排量或主打操控性的車(chē)型，如高爾夫GTI和即將上市的09款邁騰；而DQ200則是七速雙離合變速器，能承受較大扭矩為250NM，主要搭載于中低排量的車(chē)型，如下半年上市的高爾夫6、速騰等。

　　Many Chinese people's understanding of double clutch transmission also begins with DSG. Of course, Volkswagen's "double clutch" is also representative. Most of its imported cars are equipped with DSG, such as Golf GTI, EOS, Mayton Monk Cool and so on. Volkswagen EOS uses DSG dual-clutch gearbox. However, there are actually two DSG dual-clutch gearboxes in Volkswagen nowadays. The internal codes are DQ250 and DQ200. From the visual data analysis, the DSG coded DQ250 has six gears and can withstand the maximum torque of 350NM. It is mainly used for high displacement or main control vehicles, such as Golf GTI and the upcoming 09 Maiteng. DQ200 is a seven-speed dual-clutch transmission, which can withstand a maximum torque of 250 NM. It is mainly equipped with low and medium displacement models, such as Golf 6 and Suoteng, which are listed in the following six months.

　　沃爾沃：POWERSHIFT雙離合器變速箱

　　Volvo: POWERSHIFT Dual Clutch Gearbox

　　與大眾所采用的干式離合器的DSG變速箱不同，Powershift所采用的是濕式雙離合器，是將離合器片浸泡在機(jī)油當(dāng)中，來(lái)對(duì)其進(jìn)行冷卻。離合器可以將動(dòng)力輸送給六個(gè)檔位中的任何一個(gè)，由電腦控制的離合器根據(jù)汽車(chē)速度和轉(zhuǎn)速對(duì)駕駛者的換檔意圖做出判斷，可以預(yù)選擇下一擋位從而實(shí)現(xiàn)檔位的快速切換。 POWERSHIFT雙離合器變速箱[3] 由于Powershift變速箱可以設(shè)定在電腦控制的“自動(dòng)”模式之下，或者利用方向盤(pán)上的撥片來(lái)實(shí)現(xiàn)手動(dòng)換檔。搭載2.0升四缸渦輪柴油的C30、S40和V50是首批配備這種變速箱的車(chē)型。雖然這臺(tái)發(fā)動(dòng)機(jī)的較大功率和扭矩分別為136馬力和320牛米，但這種雙離合變速箱可承受的較大扭矩輸出達(dá)到450牛米。

　　Unlike the DSG gearbox of the dry clutch used by the public, Powershift uses a wet dual clutch, which immerses the clutch slice in the oil to cool it. The clutch can transfer power to any of the six gears. The computer-controlled clutch can judge the driver's shift intention according to the speed and speed of the car, and can select the next gear in advance to realize the fast shift. POWERSHIFT Dual Clutch Gearbox [3] Because Powershift Gearbox can be set in the "automatic" mode controlled by computer, or manual shift can be achieved by using the dial on the steering wheel. C30, S4 0 and V50 with 2.0 liter four-cylinder turbo-diesel are the first models equipped with such gearboxes. Although the maximum power and torque of the engine are 136 horsepower and 320 km2 respectively, the maximum torque output that the dual clutch gearbox can withstand is 450 km2.

　　保時(shí)捷：PDK雙離合器變速箱

　　Porsche: PDK Dual Clutch Gearbox

　　PDK雙離合器變速箱其原名為保時(shí)捷Doppel Kupplungen，當(dāng)然就是雙離合器變速系統(tǒng)的德文，而PDK便是取名自德文原名中三個(gè)單字的前綴字母的組合。根據(jù)消息顯示，這個(gè)全新的雙離合器變速系統(tǒng)工作原理與VW集團(tuán)的DSG相同，也同樣具備附在方向盤(pán)后方的換檔撥片，讓駕駛者手不需離開(kāi)方向盤(pán)就可以進(jìn)行換檔控制的功能。 保時(shí)捷——PDK雙離合器變速箱PDK雙離合器變速箱同樣具備兩組離合器，分別負(fù)責(zé)奇數(shù)與偶數(shù)檔位，換檔速度要比現(xiàn)在大多數(shù)普通的手排變速箱快很多，保時(shí)捷的大多數(shù)車(chē)款將把這個(gè)雙離合器變速箱作為選購(gòu)配備。

　　The original name of PDK dual clutch gearbox is Porsche Doppel Kupplungen. Of course, it is German for dual clutch transmission system. PDK is a combination of three prefix letters from the original German name. According to the news, the new dual clutch transmission system works on the same principle as the DSG of VW Group, and also has the shift pad attached to the rear of the steering wheel, so that the driver can shift without leaving the steering wheel. Porsche - PDK dual clutch gearbox PDK dual clutch gearbox also has two sets of clutches, responsible for odd and even gears, shift speed is much faster than most of the ordinary manual gearbox, most of Porsche's cars will use this dual clutch gearbox as an optional equipment.

　　Maintenance of Jinan Automatic Transmission三菱：TC-SST雙離合器變速箱Mitsubishi: TC-SST dual clutch gearbox其實(shí)三菱SST雙離合變速箱在工作原理上也是和DSG非常相似的，也同樣是在奇數(shù)擋位和偶數(shù)擋位上各采用一個(gè)離合器，兩個(gè)離合器會(huì)在同一時(shí)間各選擇一個(gè)檔位。這樣一來(lái)，汽車(chē)在脫離一個(gè)檔位后自動(dòng)掛上下一檔，其換檔速度遠(yuǎn)遠(yuǎn)快于手動(dòng)操作速度，從而縮短了換檔延遲和動(dòng)力損失。除換檔更加平穩(wěn)外，TC-SST還提高了EVO的加速度。

　　In fact, the working principle of Mitsubishi SST double clutch gearbox is very similar to DSG. It also uses one clutch in odd and even gears, and two clutches will choose one gear at the same time. In this way, the automobile automatically hangs up and down after leaving a gear. Its shift speed is much faster than the manual operation speed, thus reducing the shift delay and power loss. In addition to shifting more smoothly, TC-SST also improves EVO acceleration.