As we all know, the clutch is the connection between the engine and the transmission. The clutch plays an important role in the whole vehicle as the "switch" of the power output of the engine. In order to save space, the clutch is generally integrated with the transmission, and some models now even use two clutches and transmission integration, which is called a dual-clutch transmission, or DCT for short.
Some automatic car brands will advertise that their cars use "dual clutch" when promoting, so many people may think that a dual clutch transmission is an automatic transmission. In fact, the dual-clutch transmission cannot be called an automatic transmission because it does not have a torque converter. However, the automatic transmission clutch actuator inherits the advantages of manual transmission and automatic transmission. On the basis of using two sets of clutches to control alternately, the clutch action time is greatly shortened, so as to achieve the effect of no-gap shifting.
We know that when the mechanical transmission of concentric pneumatic clutch actuator is shifting, the clutch pedal will be stepped on. At this time, the power output from the engine will be cut off. With the increase of time, the speed of the car will drop rapidly. However, if a dual-clutch transmission is used to shift gears, the two clutches will control the odd-numbered gears and the even-numbered gears respectively. Before shifting, the variable has already combined the next gear in advance. When receiving a shifting command, the geartronic transmission will feedback and give the engine a signal to ramp up quickly. At this time, the previously meshed gears are quickly combined, the first group of clutches is disconnected, and the second group of clutches is activated. This is the shifting process of the dual-clutch transmission, because the two clutches are used to work alternately, which greatly shortens the shifting time and reduces the speed of the vehicle when shifting.
At present, cars using dual-clutch transmissions are generally manual-integrated transmission vehicles. Whether in manual transmission or automatic transmission, the car can shift at a relatively smooth speed without the phenomenon of a sharp drop in speed when shifting. Dual-clutch transmissions have many benefits, such as shortened shift times, which are especially useful when racing against the clock. In real life, the car is not a racing car. In addition, many manufacturers use the adjustment that emphasizes smoothness in the matching of dual-clutch transmission. Therefore, the application effect of dual-clutch transmission in real life is similar to that of CVT (continuously variable transmission).