Can anyone tell me what kind of gearbox DSG is?

DSG (Direct Shift Gearbox) superficially means "direct shift gearbox" in Chinese. DSG is just the proprietary name for the dual-clutch technology that Volkswagen has bought out for itself.

Origin

The origin of DSG is just like other automotive high technologies. Its design comes from racing sports, and its practical application can be traced back to the Porsche 962C in the early 1980s and the 1985 Audi sport?quattro?S1 RC racing car, and made great contributions to their winning of multiple championships~! The concept of dual clutch is very advanced, but as a new technology, there is a problem of poor durability. The durability also determines its cost. Therefore, after more than ten years of development, it is really common. For street cars.

Working principle

1: As shown in the figure, clutch 1 is responsible for 1st gear, 3rd gear, 5th gear and reverse gear, and clutch 2 is responsible for 2nd gear, 4th gear and 6th gear; engage In odd-numbered gears, clutch 1 is engaged, input shaft 1 is working, clutch 2 is disengaged, and input shaft 2 is not working. That is, during the working process of the DSG transmission, there are always 2 gears combined, one is working, and the other is. Be ready for the next step; jump downshifts can be performed in manual mode: if the starting gear and the final gear are controlled by the same clutch, they will be converted through the gear controlled by another clutch. If the starting gear and the final gear are controlled by the same clutch, If the final gear is not controlled by the same clutch, you can jump directly to the set gear.

The structure of AMT is more efficient than that of automatic transmission. In addition to the flexibility of manual transmission and the comfort of automatic transmission, DSG can also provide uninterrupted power output, which is completely different from Two automatically controlled clutches. DSG basically consists of several major items: two basic 3-axis 6-speed mechanical gearboxes, an electro-hydraulic clutch mechanism containing two sets of multi-flap clutch plates, and a gearbox ECU. Different from ordinary dual-shaft gearboxes or single-input shaft systems, the DSG gearbox not only has dual clutches, but also has a coaxial dual-input shaft system, and the six forward gears are placed on the driven shafts on both sides. . The traditional manual transmission uses a clutch. When changing gears, the driver must depress the clutch pedal to cause the gears in different gears to engage. The power is interrupted during the gear shifting, causing the output performance to be intermittent. .

DSG can be imagined as combining the functions of two manual transmissions into one and building them into a single system. DSG contains two automatically controlled clutches, which are electronically controlled and hydraulically driven, and can control the operation of two sets of clutches at the same time. When the gearbox is operating, one set of gears is engaged, and when it is time to shift gears, the gears for the next set of gears have been preselected, but the clutch is still disengaged; when shifting gears, a clutch will use the gear in use disengage, and at the same time, another gear whose clutch engagement has been pre-selected can ensure that at least one set of gears is outputting power during the entire shifting period, so that there is no interruption in power.

To cooperate with the above operation, the transmission shaft of DSG is divided into two parts, one is a solid transmission shaft placed inside, and the other is a hollow transmission shaft sleeved on the outside; the solid transmission shaft inside The shaft connects the 1st, 3rd, 5th and rear gears, while the hollow drive shaft outside connects the 2nd, 4th and 6th gears. The two clutches are each responsible for the gearing action of one drive shaft, and the engine power is generated by one of the drive shafts. For uninterrupted transmission, considering the service life of parts, designers chose an oil tank diaphragm clutch, and the clutch action is controlled by a hydraulic system.

Due to the use of two sets of clutches and the next gear has been pre-selected before shifting, the DSG's gear shifting speed is very fast. It only takes less than 0.2 seconds for the next gear to be geared. It's faster than the manual transmission of the most skilled professional drivers, so the acceleration results of using DSG on the same car are faster than using MT.

In actual driving, DSG gives people the feeling that there is no slight frustration or push and pull during the entire shifting process. It is only reflected on the tachometer that the gear is changing. In addition, DSG also has a variety of driving modes, such as sports mode. With the help of electronic programs, the upshifting of this mode is obviously slow, while the downshifting has been greatly improved. The shifting time is also adjusted to be shorter, just like driving a sports car. generally.

The driver can also switch from automatic mode to manual mode at any time by moving the shift lever or pressing a button on the steering wheel, providing a dynamic driving style. The shift buttons on both sides of the steering wheel allow the driver to shift up or down without touching the shift lever, just like an F1 driver driving an F1 car. In intense driving environments, such as high-speed curves, manual shifting is often necessary. With the help of DSG, the driver can also experience the special pleasure of automatically increasing the throttle during the shifting process.