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Schematic of a DCT (using two identical clutches located on the axis of the flywheel) 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 transmission is equipped with two oil pumps to ensure an energy-efficient supply of long-life synthetic fuel-economy low-friction oil: a mechanical rotary vane pump with chain drive, which is significantly smaller than its predecessor and located next to the main shaft, and a pump driven by a brushless electric DC motor. [8]
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 ...
Fluid Coupling: Hydraulic 4-Bolt N/A K4B 050 [h] N/A 51 kg⋅m (369 lb⋅ft) 1964 – 1981 Longitudinal: 3.9789 1.0000 4 3.9789 1.5846 1.9947 S 3 3 2 Fluid Coupling: Hydraulic 4-Bolt N/A K4C 025 [3] 722.2 25 kg⋅m (181 lb⋅ft) 1967 – 1972 Longitudinal: 3.9833 1.0000 4 3.9833 1.5852 1.9958 S 3 3 2 Fluid Coupling: Hydraulic 4-Bolt N/A K4A 040 ...
When the pump is configured for low displacement, it produces a low volume of oil flow, causing the hydraulic motor(s) to turn more slowly. As the pump's displacement is increased, a greater volume of oil flow is produced for any given engine RPM, causing the motor(s) to turn faster. Advantages of a hydrostatic CVT include: Capacity scalability.
A continuously variable transmission (CVT) can change seamlessly through a continuous range of gear ratios. This contrasts with other 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 RPM while the vehicle moves at varying speeds.
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.
TC-SST uses dual-clutches to change gears.The TC-SST completes the clutch and gear shifts more quickly than a driver could in a conventional manual transmission, and is also quicker than either an automatic transmission with a torque converter, or a single-clutch automated manual transmission. [3]
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