Working Principle of Dual Clutch Automatic Transmission

Working Principle of Dual Clutch Automatic Transmission

The dual-clutch transmission is abbreviated as dual-clutch automatic transmission. Because it has two sets of clutches, it is called "dual-clutch transmission". The dual-clutch gearbox originated from motorsports. It was first used in some racing cars in the 1980s. This technology has a history of more than 30 years and is very mature in terms of technology.

Ⅰ. Introduction of dual-clutch automatic transmission

The traditional automatic transmission structure has a significant loss of power, and a considerable part of the engine's power is swallowed up during the power transmission process of the gearbox. Compared with manual gearboxes, automatic gearboxes will also increase fuel consumption while losing control. How can we find a more reasonable solution in terms of convenience and performance? The dual-clutch automatic transmission may be a better way out. Next, we will briefly understand this more advanced form of the gearbox.

In the late 1990s, the first dual-clutch transmission suitable for mass production and application to mainstream models appeared. The dual-clutch technology makes the manual transmission with automatic performance while greatly improving the car's fuel economy. The application of this technology can ensure that the gearbox eliminates the phenomenon of vehicle power interruption when shifting gears.

Ⅱ. The working principle of dual-clutch automatic transmission

The automatic is based on a manual transmission. The difference from the manual gearbox is that the two clutches in the dual-clutch automatic transmission are connected to two input shafts, and the shifting and clutching operations are realized through a mechatronic module that integrates electronic and hydraulic components. The clutch pedal no longer operates.

Just like a hydraulic automatic transmission, the driver can manually shift gears or put the gear lever in fully automatic D gear (comfort type, shift gears when the engine is running at low speed) or S gear (task type, shift gears when the engine is running at high speed) model. Shifting in this mode is usually realized by gears and clutch actuators. The two clutches are connected to different input shafts. If clutch one is connected to gears 1, 3, and 5 through a solid shaft, clutch two is bound to gears 2, 4, 6 and reverse gear through a hollow shaft. In layman's terms, this type of dual-clutch automatic transmission has two clutches, one for 1, 3, and 5 gears, and the other for 2, 4, and 6 gears. When the first gear is used, the second gear is ready, so the shift time is considerably shortened, and there is no delay.

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