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A direct-shift gearbox (DSG, German: Direktschaltgetriebe [1]) [2] [3] is an electronically controlled, dual-clutch, [2] multiple-shaft, automatic gearbox, in either a transaxle or traditional transmission layout (depending on engine/drive configuration), with automated clutch operation, and with fully-automatic [2] or semi-manual gear selection.
Rated up to 23.5 kg⋅m (230 N⋅m; 170 lbf⋅ft) while having a dry weight of 79.9 kg (176.1 lb). It is contracted by Chrysler Group LLC for use in 2013–2016 Dodge Dart and 2014-2016 Jeep Compass and Jeep Patriot, the transmission is designed to be maintenance-free under normal use and is assembled in South Korea.
The operation of a dual-clutch transmission is analogous to two traditional manual transmissions, each with its own clutch, operating in parallel and alternating shifts. The Ford unit is a six-speed with one clutch acting on reverse, first, third, and fifth gears, and the other used for second, fourth, sixth gears.
The transaxle configuration combines the gearbox and final drive in one housing and is only built in individual cases; In the transverse direction, the gearbox and final drive are very often combined in one housing due to the much more restricted space available; Every type of transmission occurs in every type of installation.
In my DSG car, when downshift is anticipated, the gearbox selects a lower gear on the unused gearshaft, which connects that gearshaft to the wheels, speeding it up to match the wheel speed; at the point the downshift happens, one clutch opens, the engine is "blipped" by the transmission to the higher revs needed to match with the lower gear ...
Mercedes-AMG developed the 7-speed MCT "Multi Clutch Technology" planetary automatic transmission. The MCT transmission is essentially the 7G-Tronic automatic transmission without a torque converter. Instead of a torque converter, it uses a compact wet startup clutch to launch the car from a stop and also supports computer-controlled double ...
Mercedes-AMG developed the MCT 9G (Multi Clutch Technology) transmission. It made its debut in the Mercedes-AMG E 63 4Matic+. The MCT transmission is essentially the 9G-Tronic with a start-off wet clutch (NAK for German Nass-Anfahrkupplung) replacing the torque converter. This saves weight and optimises the response to the accelerator pedal input.
The other notable article is the Direct-Shift Gearbox - the specific Volkswagen Group DSG transmission. Oh, and these types were not 'pioneered' on the Veyron at all - they were actually pioneered on the Volkswagen Golf Mk4 R32 in 2003. ;-) 78.32.143.113 ( talk ) 09:31, 13 January 2010 (UTC) [ reply ]
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