![]() ![]() The control unit, often referred to as the mechatronics unit, acts as the brain of the DCT system. The gear sets are arranged in such a way that they can be engaged or disengaged independently, allowing for seamless transitions between gears. Each gear set comprises a pair of gears: one mounted on the input shaft and the other on the output shaft. The input shafts are responsible for driving the gear sets. ![]() By having two clutches, DCTs can pre-select the next gear while the current gear is engaged, resulting in lightning-fast gear changes. One shaft controls the odd-numbered gears (1, 3, 5, etc.), while the other manages the even-numbered gears (2, 4, 6, etc.). Input Shafts and ClutchesĪ DCT consists of two input shafts, each connected to a separate clutch. To understand the working principle of a dual-clutch transmission, let's take a closer look at its key components and their functionalities. This system consists of two separate clutches, one for odd-numbered gears and the other for even-numbered gears. Unlike traditional automatic transmissions that rely on a torque converter, DCTs offer quicker and smoother gear changes, resulting in improved performance and fuel efficiency.ĭCT gearboxes use a dual-clutch system. It is a type of automatic transmission that utilises two separate clutches for seamless gear shifting. The Editorial department is independent of ’s advertising, sales and sponsored content departments.DCT (Dual Clutch Transmission), also known as a twin-clutch or direct-shift gearbox, is an advanced technology that has revolutionised the automotive industry. In line with ’s long-standing ethics policy, editors and reviewers don’t accept gifts or free trips from automakers. Instead, CVTs operate like rheostats, gradually changing gear ratios up or down, as on a dimmer switch for lights.Ĭars.com’s Editorial department is your source for automotive news and reviews. ![]() Others have embraced continuously variable automatic transmissions, which eliminate the traditional shifting through a series of set gears. Several manufacturers, though, have stuck with conventional automatics, which they say have been improved to shift as quickly as DCTs and can accommodate as many as 10 gears to boost fuel economy. Some manufacturers offer DCTs, including BMW, Hyundai, Mercedes-Benz, Porsche and Volkswagen, among others, and particularly on performance models where acceleration and transmission responsiveness are priorities. Why Manual Transmissions Are Dying … and What’ll End Them for Good.Some vehicle owners may not be aware that they have a DCT, only that the transmission shifts automatically. However, as the EPA advises, “Your mileage will vary,” so better gas mileage isn’t guaranteed with DCTs.ĭCTs are designed to operate fully automatically or let the driver shift gears manually with paddle shifters or the transmission shift lever. Power flow to the transmission also remains constant in a DCT unlike in a manual transmission, where depressing the clutch pedal to shift gears interrupts power flow.Ĭar companies that offer DCTs claim they combine the convenience of an automatic and the efficiencies of a manual (such as direct engagement of gears instead of through fluid couplings in an automatic), and that DCTs yield higher fuel economy than conventional automatics. When one gear is engaged in a DCT, the computer is already queuing up the next gear, so shifts can be faster and smoother than in a conventional torque-converter automatic transmission. A transmission control module (i.e., computer) manages when the transmission shifts automatically, eliminating the need for the clutch pedal used on regular manual transmissions. One clutch handles the odd-numbered gears, the other clutch the even-numbered gears. View all 2020 Porsche 911 models for sale near 60606 ![]()
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