Box DSG - reviews. DSG robotic gearbox - device, principle of operation, prices

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

As you know, there are only a few types of transmissions in the world - mechanical, automatic, tiptronic and CVT. Each of them differs in its design and principle of operation. However, a few years ago, German engineers managed to combine "automatic" with "mechanics". As a result, this invention was called the DSG box. What is this transmission and what features does it have? All this later in our article.

Characteristic

The DSG is a type of mechanical transmission and can be designed for 6 or 7 speeds. This gearbox belongs to the type of direct shift boxes. It has its own automatic gearshift drive and is equipped with two clutches.

Destination

The function of this element is to smoothly shift gears without breaking the flow of power. Due to its special design (we will talk about the device below)it is distinguished by higher consumer qualities than tiptronic and other types of transmissions. In fact, the DSG box provides the car with greater acceleration dynamics and economical fuel consumption.

Varieties

As we said earlier, this transmission can be seven- or six-speed. The first type of gearbox is often installed on low-power vehicles (crossovers and cars) with an engine torque of less than 250 N/m.

These are B, C and D-class cars. The six-speed DSG transmission is designed for torque transmission up to 350 N / m and is most often mounted on full-size SUVs and other cars equipped with powerful engines.

Device

Regardless of the number of speeds, the DSG automatic gearbox has the same design, which includes the following elements:

• main gear;
• differential;
• crankcase (body);
• double clutch;
• dual-mass flywheel;
• two rows of gears;
• control system.

As you can see, the 7 DSG box has almost the same device as the usual "mechanics", with the exception of some elements. Among them, one should highlight such a detail as a double clutch. It is this element that performs the function of transferring forces from the engine to the 1st and 2nd gears. On a six-speed transmission, the drive disc acts as a clutch. The latter is connected to the flywheel through the input hub. Also, 2 are involved in the transmission of torquemulti-plate clutches that communicate with rows of even and odd gears through a hub. The seven-speed DSG box is simpler - there are 2 conventional friction clutches. This ensures the most smooth gear shifting with the least load on the motor.

The presence of a double clutch that connects the box to the engine is the main feature of these types of transmissions. What is most interesting, one of them works to switch even speeds, and the second - to odd ones, and to reverse gear.

Thus, when the car accelerates in first gear, the second gears are already engaged. That is, the intermediate time for the transition from one speed to another decreases several times. This is very true for sports cars. By the way, the first instances of DSG boxes were tested on German Volkswagen Golf cars, after which DSGs began to be equipped with Skoda, Mercedes and many other foreign cars.

Differences between six- and seven-speed gearboxes

The characteristic difference between these transmissions is the amount of oil filled, which contributes to the smooth operation of the gears inside the case. The 6-speed DSG has a "wet-type" clutch, meaning it is in oil at all times.

The amount of fluid required for normal operation of the gearbox is about 6.5 liters. In terms of financial costs, the operation of such a transmission can greatlyhit the pocket of the car owner. Therefore, on most DSG boxes (we are talking about 7-speed), the clutch is of a “dry” type. In total, for the operation of such a gearbox, it is enough to fill in 1.7 liters of oil. This increases fuel economy and reduces energy costs. By the way, the oil pump on such boxes is not hydraulic, but electric.

DSG gearbox - reviews of motorists

Judging by the information that was presented in the reviews, most drivers appreciate the efficiency of this transmission. That is, the time for gear shifting is reduced so much that the operation of the DSG can be compared with the operation of a variator (stepless automatic transmission). Plus, the driver does not feel the various shocks and sounds that can be generated when working with an ordinary "mechanics" or "automatic". And if the DSG “kicks”, then only when reverse gear is turned on and the gas pedal is pressed sharply.

Key Benefits

What else is good about a DSG gearbox? Reviews of car owners claim that fuel consumption never goes beyond the norm. Since at first this box was installed only on the German Golf, we will consider the issue of efficiency using its example. The average engine that this car was equipped with, with its 122 horsepower, could consume less than 5.9 liters of gasoline per “hundred”. The same engine, equipped with the usual "mechanics", consumed about 6.3 liters of fuel. As you can see, there is a difference in consumption, and considerable. But this is not the only difference between the DSG gearbox. Driver reviews saythat in the presence of a double clutch, the motor resource is almost doubled, since the working parts do not experience such a shock as with a conventional transmission.

DSG is also distinguished by high build quality and maintainability. According to statistics, sales of cars with such a transmission in Europe increased by almost 30 percent. In the future, European manufacturers plan to further increase this figure.

Judging by the reviews, the main advantage of the DSG is the speed of the gearbox. According to the test results, the time spent by the checkpoint in the standby mode is only 0.08 seconds. Also, due to the presence of a double clutch, the engine almost does not lose its power, and therefore works at full strength. At the same time, drivers note the possibility of disabling the box when driving on an inclined surface (like a "neutral" on a manual transmission), which reduces the total fuel consumption.

Well, the last good quality of this gearbox is its weight, which is 70 kilograms. Conventional automatic transmissions weigh much more than a DSG transmission.

Main flaws

What are the problems and disadvantages of the DSG 7 box? In general, drivers characterize this transmission on the positive side, but note small disadvantages. Among them is the high cost of maintenance. Repair of DSG boxes in Russia can only be performed at specialized service stations. Due to its design features, this gearbox requires special skills and knowledge during assembly and disassembly, and there are not very many specialists who know a lot about such boxes. Morethis box is very expensive to manufacture. Therefore, cars with such a transmission cost 500-1000 dollars more than, for example, cars with manual transmissions.

Resource

How long does a DSG gearbox last? Reviews of car owners say that the average life of this transmission is about two hundred thousand kilometers. After that, the gearbox is repaired. Often this is a clutch replacement, which takes on enormous loads all the time.