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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.
Historically, a dual-clutch transmission shifts faster than a standard hydraulic automatic transmission with a torque converter or a single-clutch automated manual transmission. This is possible because the DCT can pre-select the next gear and transfer torque from one clutch to the next clutch with the pre-selected next gear, thus reducing ...
Automatic – once placed in drive (or any other 'automatic' selector position), it automatically selects the gear ratio dependent on engine speed and load; Basically there are two types of engine installation: In the longitudinal direction, the gearbox is usually designed separately from the final drive (including the differential). The ...
The Ford PowerShift are 6 and 7-speed dual-clutch automatic transmissions, produced for the Ford Motor Company. [1] The 6 speed PowerShift gearboxes were built by Getrag Ford Transmissions, a joint-venture with Getrag,. [2] PowerShift improves fuel efficiency by as much as 10 percent when compared to a conventional automatic transmission. [1]
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 ...
The transmission debuted on the E 350 BlueTEC in 2013, [1] and successively replaced both the 7-speed 7G-Tronic (PLUS) transmission and the 5-speed 5G-Tronic transmission. It includes versions for a maximum input torque of 1,000 N⋅m (738 lb⋅ft). [2] After the 5G- and 7G-Tronic, this is the 3rd generation of modern automatic transmissions.
Unlike previous Golfs which featured a 7-speed dual-clutch gearbox (DSG), this engine will be paired with a traditional 8-speed torque converter automatic. The transmission choice is due in part to the specific engine calibration (and automatic transmission combination) developed to meet Australia's outdated Euro 5 emissions regulations ...
Not all automatic transmissions change gear ratios. What they all do is change the ratio of engine speed to wheel speed. Very simple. It should have been the first thing that the article says. Continuously variable transmissions, a type of automatic transmission, accomplish providing a desired ratio, by changing pulley ratios, not "gear ratios ...
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