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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 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.
A continuously variable transmission (CVT) can change seamlessly through a continuous (infinite) range of gear ratios, compared with other automatic transmissions that provide a limited number of gear ratios in fixed steps. The flexibility of a CVT with suitable control may allow the engine to operate at a constant angular velocity while the ...
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.
They may be used in passenger cars and SUVs, or light commercial vehicles such as vans and light trucks. Aisin is a company of the Toyota Group . Therefore, the transmissions of both manufacturers are often based on identical gearset concepts.
Since the clutch is not used, it is easy to mismatch speeds of gears, and the driver can quickly cause major (and expensive) damage to the gears and the transmission. Heavy trucks are usually powered with diesel engines. Diesel truck engines from the 1970s and earlier tend to have a narrow power band, so they need many close-spaced gears.
ZF Friedrichshafen AG is a German technology manufacturing company that supplies systems, in particular transmissions for passenger cars and SUVs, light commercial vehicles such as vans and light trucks, as well as all types of heavy and special vehicles. Basically there are two types of motor vehicle transmissions:
The 6R is a 6-speed automatic transmission for longitudinal engine placement in rear-wheel drive vehicles. It is based on the ZF 6HP26 transmission [1] and has been built under license by the Ford Motor Company at its Livonia Transmission plant in Livonia, Michigan.