Advantages and disadvantages of dual clutch transmission

Time：

2018-12-17

What is a dual clutch transmission? More and more models now use dual-clutch gearboxes. The dual-clutch gearbox has its own advantages and disadvantages. But despite the buzz, many car companies still insist on using it. So why are domestic car companies so fond of using dual clutch gearboxes? Let's take a look at the advantages and disadvantages of the dual clutch transmission together with Xiaobian.

The so-called dual-clutch gearbox is actually composed of two sets of manual gearboxes. The two clutches respectively control the connection and disconnection between the two sets of gears and the engine, so that when the "1st gear" is hung, the "2nd gear" is ready and hung. In the "2nd gear", the "3rd gear" is also prepared in advance, and so on, from the time interval of shifting off, to achieve rapid shifting.

It is precisely because of the inherent advantages of the dual-clutch gearbox, even if the major manufacturers have difficulties, they must try to overcome the technical difficulties and develop their own dual-clutch gearbox, including their own brands.

DSG dual clutch transmission: two sets of gearboxes

The DSG gearbox combines the advantages of a conventional manual transmission with an automatic transmission, just as two transmissions are combined, one clutch controls the single gear and the other clutch controls the double gear. That is to say, when the gearbox is engaged in the first gear, the second gear has been engaged, and when the shift timing is reached, the second clutch is engaged with the engine output shaft and switched into the second gear. At the same time, the third gear set controlled by the first clutch also completes the toothing waiting for the shift command. The DSG gearbox's small hydraulic power loss during shifting and extremely short shift times result in high efficiency throughout the shifting process, reducing energy losses and naturally increasing acceleration and vehicle fuel economy.

Nowadays, many people may know the dual-clutch gearbox. In fact, the dual-clutch gearbox can be subdivided into two types: "dry" dual-clutch transmission and "wet" dual-clutch transmission. long. Simply put, the "dry" dual clutch has the advantage of being more sensitive than the general "wet" dual clutch transmission, but the wear on the clutch plates is more severe. The "wet" dual clutch reduces the wear of the clutch plate, but since it is controlled by the electro-hydraulic control system, there is a certain delay in use.

Advantages: The vehicle will not have the feeling of power interruption during the acceleration process, making the acceleration of the vehicle more powerful and smooth. The acceleration time of 100 kilometers is shorter than that of the traditional manual transmission; the reaction is very sensitive and has good driving pleasure; the fuel economy is outstanding. .

Disadvantages: expensive, high maintenance costs.

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