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Top DUAL CLUTCH TRANSMISSION ( DCT ) 1 LITRE

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Product details

A dual-clutch transmission (DCT) (sometimes referred to as a twin-clutch transmission) is a type of multi-speed vehicle transmission system, that uses two separate clutches for odd and even gear sets.[1] The design is often similar to two separate manual transmissions with their respective clutches contained within one housing, and working as one unit.[2][3] In car and truck applications, the DCT functions as an automatic transmission,The concept of a dual-clutch transmission was invented by French engineer Adolphe Kégresse in 1939.[11] The transmission was intended for use in the Citroën Traction Avant, however Kégresse ran out of money before a working model could be developed.[12]

One of the first production DCTs was the Easidrive unit developed in the late 1950s by UK's Smiths Industries and Rootes. This DCT — introduced on the 1961 Hillman Minx (Series IIIC) — used two electro-magnetic clutches, along with analogue electronics and a series of solenoids to implement the gear shifts.[13][14] The Easidrive was offered as an option on Hillman and Singer models, however it was not a reliable device and many were replaced by conventional manual transmissions.

Specifications

Key Features

The fundamental principle of a DCT is that one clutch drives a gear-set for the even-numbered gears, while the other clutch drives the odd-numbered gears.[1][2][4] Since the DCT can pre-select an odd gear while the vehicle is being propelled in an even gear (or vice versa), DCTs can shift several times faster than is possible with a manual transmission.[3][5] By timing the operation of one clutch to engage at the precise moment that the other is disengaging, a DCT can shift gears without interrupting the torque supply to the wheels.[4][5]