You can view the function of the impeller and turbine, in addition to these other components, in this video: There are additional components in modern torque converters. The faster the engine rotates, the more oil pressure is applied to the turbine, increasing the speed of the turbine until it eventually nearly matches the speed of the impeller. As the oil pressure around the circumference increases, the oil is pushed onto the vanes of the turbine, beginning to apply rotational force. When the torque converter spins, oil inside of it is pushed to the outer circumference by the impeller. The second is attached to the input shaft of the transmission. This set of vanes is called the impeller. It has two sets of vanes, one attached to the flexplate, which is bolted to the back of the engine crankcase.
#AUTOMATIC DCT TRANSMISSION MANUAL#
It engages and disengages the transmission from the engine, providing the function of a clutch in a manual transmission. The torque converter is a fluid coupling. In addition to these systems, there is a gear-driven oil pump to provide hydraulic pressure for actuation. It’s much more challenging to explain how an automatic transmission works, but here are the basics: An automatic transmission relies on three primary systems to function: planetary gear sets, a torque converter and sets and clutches with a control system. This transmission is capable of lightning-quick shifts in as little as 80 milliseconds. The GT500 features the 7-speed TREMEC TR-9070 DCT. It features the TREMEC TR-9080 DCT, our first 8-speed transmission, which includes a nested concentric clutch and integrated differential (either mechanical limited-slip or electronically actuated limited-slip).Īn example of a longitudinal DCT can be found in the 2020 Ford Mustang Shelby GT500. The 2020 Chevrolet Corvette Stingray is an example of a transaxle DCT. The TREMEC TR-9080 DCT used in the 2020 Chevrolet Corvette Stingray is an example of a traverse DCT, which integrates the differential with the transmission. There are both longitudinal and traverse versions of a DCT.
While most transaxles are found in front-wheel-drive vehicles, they are also used in rear- and mid-engine high performance vehicles. A transaxle combines the function of the transmission and the drive axle, and it has an internal differential to send power to left and right axleshafts. Essentially the transmission has already shifted, and changing gears is actually just a matter of disengaging one clutch and engaging the other one.Ī DCT can be either a traditional longitudinal transmission, used in typical rear-wheel-drive cars, or a transaxle which is also referred to as a transverse transmission.
This is also what makes a DCT capable of extremely quick shifts.
This allows the transmission to pre-select the next gear and be ready for the next upshift. Typically the odd gears (First, Third, etc.) are on one input shaft, while the even gears are on the other shaft. This is one of the key unique technologies in a DCT, and it is the brain of the transmission.
#AUTOMATIC DCT TRANSMISSION DRIVER#
The difference is that instead of being actuated by a driver via the transmission shifter, the shift forks are moved by an actuation system and controlled by the transmission or powertrain electronic control module (ECM). Like a manual transmission, a DCT has synchronizers and shift forks. The clutches ride on the separate shafts and are used to engage and disengage the shafts individually. It also has two input shafts-one inside the other. As the “dual clutch” name implies, a Dual Clutch Transmission has two clutch assemblies.
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