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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 ...
The C725 is a 7-speed version developed for engines up to 250 N⋅m (180 lbf⋅ft) of maximum torque and intended only for front-wheel-drive vehicles and transverse engines and is produced in China by the GAC Fiat joint-venture. Three FCA models currently have this transmission as an option, the Fiat Ottimo, the Fiat Viaggio, and the Alfa Romeo ...
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 ...
The Lamborghini Aventador uses a single-clutch lightweight 7-speed automated manual gearbox built by Graziano. [ 7 ] [ 8 ] Despite being single-clutch, gear-shifts are accomplished in 50ms. The Gallardo and the first-generation Audi R8 used a mid-engine Graziano gearbox ( manual or automated manual versions).
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. As the first gear is engaged, the 2-4-6 clutch is disengaged and the second gear cogs are engaged. At the appropriate time, the R-1-3-5 clutch is disengaged and the 2-4-6 clutch is engaged.
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.
7DCT300 – 7-speed dual-wet-clutch – Renault EDC and Mini/BMW Steptronic Doppelkupplung since MY2018 in FWD applications, Ford Puma and Ford Fiesta since MY2020 7DCT400 – 7-speed dual-wet-clutch – Tougher version of the 7DCT300 that can handle up to 400 Nm of torque [12] 7HDT300/ 7HDT400 – 7-speed dual-wet-clutch for hybrid ...
Efficiency is generally high because most of the dynamic friction is caused by very slight transitional clutch speed changes. The drawback to ratcheting CVTs is the vibration caused by the successive transition in speed required to accelerate the element, which must supplant the previously operating and decelerating power-transmitting element.
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