Types of DSG boxes. DSG box: pros and cons, strengths and weaknesses "DSG How does DSG work 7

The robotic transmission with two dry clutches DSG 7 is one of the most common gearboxes installed on VAG cars today. On our website, we have already talked in detail about the principle of operation and the history of the origin of DSG, today we would like to talk in detail about which cars are installed DSG seven, or rather, make a detailed list by brands and models, we hope that this information will be useful to you.

But first, it should be said that the DSG 7 DQ200 is installed on front-wheel drive vehicles equipped with gasoline turbo engines with a transverse arrangement. Often the volume of such engines does not exceed 1.8 liters, and the power is 180 hp. and 250 Nm of torque. This transmission model uses dual mass dry clutches. This design solution is much more reliable than the flywheel that was used in the DSG-6. With the help of an updated firmware, the manufacturer reduced the maximum load on the box when the gas pedal is fully depressed. This allows you to avoid overloads and many breakdowns. If you are a fan of VAG cars, you can safely choose one of the following models with DSG 7 DQ200, because this transmission has all the advantages of robotic boxes, but at the same time it is devoid of many typical disadvantages of previous versions.

Types of gearboxes DSG 7

Seven-speed robotic gearboxes are available in several modifications and are designed for different types of vehicles.

The simplest dry clutch robot is labeled DQ200. This transmission is designed for low-power powertrains. This gearbox can be found on many front-wheel drive vehicles that are used as a daily means of transportation.

The DQ500 is a wet clutch robot. It is more reliable and withstands more intense loads than its predecessor. Such a box can withstand a torque of up to 600 N * m and is used for more powerful power units. Suitable for all-wheel drive vehicles.

Previous robots are designed for machines with a transverse motor. The DL501 and DL382 wet clutch gearboxes are suitable for longitudinally mounted engines.

Separately, I would like to say about the new 7-speed DQ381 robot. This box represents an improved version of DSG 7, which reduces the amount of harmful emissions into the atmosphere, has a reduced coefficient of friction between parts. The manufacturer assures that it is more reliable than its predecessors, but it is too early to judge this, time will tell.

List of cars with DSG 7

SEAT

• SEAT Ibiza IV 1.2 105 HP (2008 - 2012 onwards)
• SEAT Ibiza IV 1.6 105 HP (2008 - 2012 onwards)
• SEAT Ibiza IV restyling 1.2 105 hp (2012 - 2017 onwards)
• SEAT Ibiza IV restyling 1.6 105 hp (2012 - 2017 onwards)
• SEAT Ibiza FR IV restyling 1.4 150 hp (2012 - 2017 onwards)
• SEAT Ibiza IV restyling 1.0 110 hp (2015 - 2017 onwards)

• SEAT Leon II restyling 1.8 160 hp (2009 - 2012 onwards)
• SEAT Leon III 1.2 105 HP (2013 - 2017 onwards)
• SEAT Leon III 1.4 122 HP (2013 - 2017 onwards)
• SEAT Leon III 1.4 140 HP (2013 - 2017 onwards)
• SEAT Leon III 1.8 180 HP (2013 - 2017 onwards)

• SEAT Toledo 1.4 125 HP (2012 - 2017 onwards)
• SEAT Toledo 1.6 90 HP (2012 - 2017 onwards)

Skoda

• Skoda Fabia II restyling 1.2 105 hp (2012 - 2015 onwards)
• Skoda Fabia III 1.2 110 HP (2014 - 2017 onwards)

Fabia rs

• Skoda Fabia RS II 1.4 180 HP (2010 - 2014 onwards)

• Skoda Octavia A5 1.4 122 HP (2008 - 2013 onwards)
• Skoda Octavia A5 1.8 160 HP (2008 - 2013 onwards)
• Skoda Octavia A7 1.4 150 HP (2013 - 2017 onwards)
• Skoda Octavia A7 station wagon 1.4 150 HP (2013 - 2017 onwards)
• Skoda Octavia A7 1.8 180 HP (2013 - 2017 onwards)
• Skoda Octavia A7 1.8 180 HP station wagon (2013 - 2017)
• Skoda Octavia 1.4 TSI 2019 MY
• Skoda Octavia 1.8 TSI 2019 MY

• Skoda Rapid 1.4 TSI 2019 MY

Roomster

• Skoda Roomster 1.2 105 HP (2010 - 2015 onwards)

• Skoda Superb II 1.8 160 HP (2008 - 2013 onwards)
• Skoda Superb II restyling 1.8 152 hp (2013 - 2015 onwards)
• Skoda Superb II restyling station wagon 1.8 152 hp (2013 - 2015 onwards)
• Skoda Superb III 1.4 150 HP (2015 - 2017 onwards)
• Skoda Superb III 1.8 180 HP (2015 - 2017 onwards)
• Skoda Superb III station wagon 1.8 180 hp (2015 - 2017 onwards)
• Skoda Superb 2.0 TSI 2 WD 2019 MY
• Skoda Superb 2.0 TDI 2 WD 2019 MY
• Skoda Superb 2.0 TDI 4 WD 2019 MY

• Skoda Yeti 1.2 105 HP (2009 - 2014 onwards)
• Skoda Yeti 1.4 122 HP (2009 - 2014 onwards)
• Skoda Yeti restyling 1.4 122 hp (2014 - 2017 onwards)

Volkswagen

• Volkswagen Beetle A5 1.2 105 HP (2013 - 2017 onwards)
• Volkswagen Beetle A5 1.4 160 HP (2013 - 2017 onwards)

• Volkswagen Golf VI 1.2 105 HP (2009 - 2012 onwards)
• Volkswagen Golf VI 1.4 122 HP (2009 - 2012 onwards)
• Volkswagen Golf VI 1.6 102 HP (2009 - 2012 onwards)
• Volkswagen Golf VII 1.4 125 HP (2013 - 2017 onwards)
• Volkswagen Golf VII 1.4 150 HP (2013 - 2017 onwards)

Golf Plus

• Volkswagen Golf Plus II restyling 1.2 105 hp (2009 - 2014 onwards)
• Volkswagen Golf Plus II restyling 1.4 122 hp (2009 - 2014 onwards)
• Volkswagen Golf Plus II restyling 1.6 102 hp (2009 - 2014 onwards)

• Volkswagen Jetta V 1.2 105 HP (2005 - 2011 onwards)
• Volkswagen Jetta VI 1.4 122 HP (2011 - 2014 onwards)
• Volkswagen Jetta VI 1.4 50 HP (2011 - 2014 onwards)
• Volkswagen Jetta VI restyling 1.4 125 hp (2015 - 2017 onwards)
• Volkswagen Jetta VI restyling 1.4 150 hp (2015 - 2017 onwards)

• Volkswagen Passat B6 1.4 122 HP (2005 - 2011 onwards)
• Volkswagen Passat B6 1.8 152 HP (2005 - 2011 onwards)
• Volkswagen Passat B6 Estate 1.4 122 HP (2005 - 2011 onwards)
• Volkswagen Passat B6 Estate 1.8 152 HP (2005 - 2011 onwards)
• Volkswagen Passat B7 1.4 122 HP (2011 - 2015 onwards)
• Volkswagen Passat B7 1.4 150 HP (2011 - 2015 onwards)
• Volkswagen Passat B7 1.8 152 HP (2011 - 2015 onwards)
• Volkswagen Passat B7 1.4 Estate 122 HP (2011 - 2015 onwards)
• Volkswagen Passat B7 1.4 Estate 150 HP (2011 - 2015 onwards)
• Volkswagen Passat B7 1.8 Estate 152 HP (2011 - 2015 onwards)
• Volkswagen Passat B8 1.4 125 HP (2015 - 2017 onwards)
• Volkswagen Passat B8 1.4 150 HP (2015 - 2017 onwards)
• Volkswagen Passat B8 1.8 180 HP (2015 - 2017 onwards)
• Volkswagen Passat B8 Estate 1.4 150 HP (2015 - 2017 onwards)
• Volkswagen Passat B8 Estate 1.8 180 HP (2015 - 2017 onwards)
• Volkswagen Passat 1,8 TDI 2018-19 MY

The new Passat, which was released in 2019, is also available with a robotic 7-speed gearbox, but these models use the new DSG-7 DQ 381, equipped with a dual wet clutch.

Passat CC

• Volkswagen Passat CC 1.8 152 HP (2008 - 2011 onwards)
• Volkswagen Passat CC restyling 1.8 152 hp (2011 - 2015 onwards)

• Volkswagen Polo V 1.2 90 HP (2014 - 2017 onwards)
• Volkswagen Polo V 1.2 110 HP (2014 - 2017 onwards)
• Volkswagen Polo V 1.4 150 HP (2014 - 2017 onwards)
• (2015 - 2017 onwards)
• Volkswagen Polo 1.4 TSI 2018-19 MY

Scirocco

• Volkswagen Scirocco III 1.4 122 HP (2009 - 2015 onwards)
• Volkswagen Scirocco III 1.4 160 HP (2009 - 2015 onwards)

Whatever they say about DSG, but we can find them on the most popular car models of different years of release. The manufacturer is improving the robotic transmission, while maintaining all the advantages of this box and eliminating the typical "sores". If a few years ago many were afraid to buy cars with a robot, today there are more and more people wishing to become their owners. Time and the experience of car owners prove that if the rules of operation of this transmission are followed, it rarely brings unpleasant surprises.

Korean engineers followed the German manufacturers. Already now we can meet Kia and Hyundai cars on which a seven-speed DCT robot with two clutches is installed.

To date, DSG has become a very common automatic transmission model for VAG cars and we are ready to provide you with a large assortment of repaired and used DSG boxes, mechatronics, clutches and parts for them (used and new clutches are in great demand).

• We have been working since 1998, the territory is 2100 sq. m.
• We carry out with a WARRANTY repair and sale of automatic transmission DSG, mechatronics, clutches, as well as further consultations, programming and assistance with adaptation, commissioning and adjustment of the clutch.
  

• DSG 7 - 0AM: mechatronics repair from 12.000 rubles. 12 months warranty
  DSG 7 - 0AM: repair automatic transmission 70.000 - 80.000 rubles. 12 months warranty or 20.000 km
  DSG 7 - 0AM: Used automatic transmission 50.000 - 60.000 rubles. 3 months warranty
  DSG 7 - 0AM: Clutch with replacement used (turnkey) 23.000 rubles. 6 months warranty
  DSG 7 - 0AM: Clutch with replacement N / O (turnkey) 31,000 rubles. 12 months warranty
  DSG 7 - 0AM: Clutch with replacement OEM (turnkey) 43.000 rubles. warranty 18 months

• DSG 7 - 0B5: mechatronics repair from 30,000 - 50,000 rubles. 12 months warranty
  DSG 7 - 0B5: repair mechatronics - 50,000 rubles. 12 months warranty
  DSG 7 - 0B5: ECU (control unit) mechatronics - 30,000 rubles. 12 months warranty
  DSG 7 - 0B5: overhaul automatic transmission 120.000. 12 months warranty or 20.000 km
  DSG 7 - 0B5: Used automatic transmission 85,000 rubles. 3 months warranty
  DSG 7 - 0B5: Clutch repair kit 18.000 rubles. 6 months warranty
  DSG 7 - 0B5: Clutch assembly kit 35,000 rubles. 12 months warranty

• DSG 7 - 0BT / 0BH: mechatronics repair from 25.000 - 50.000 rubles. 12 months warranty
  DSG 7 - 0BT / 0BH: repair mechatronics - 50,000 rubles. 12 months warranty
  DSG 7 - 0BT / 0BH: repair automatic transmission 110.000 - 120.000 rubles. 12 months warranty or 20.000 km
  DSG 7 - 0BT / 0BH: Used automatic transmission 85,000 - 95,000 rubles. 3 months warranty
  DSG 7 - 0BT / 0BH: Clutch assembly set 25.000 rubles. 12 months warranty

Dual Clutch Automatic DSG - Direct Shift Gearbox (DSG, Direct-Shift Gearbox)

The first in this field was the Volkswagen concern. The design of such transmissions practically does not differ from each other for each of the manufacturers. The DSG (Direct Shift Gearbox) robotic gearbox is currently the most advanced automated transmission.

When 1st gear is engaged, the clutch locks the 1st gear on the driven shaft. Then the clutch is closed and the torque is transmitted through the internal input shaft to the gearbox. Together with the engagement of 1st gear, the mechatronic (DSG control unit) blocks the gears of the 2nd gear. Thus, two gears are engaged at once, although the 2nd gear does not engage, because the outer shaft clutch is open. If necessary, switch to second gear, the DSG mechatronic opens the first clutch discs and closes the second. Then the torque is already going through the outer input shaft and the second gears. In the meantime, the 3rd stage is blocked on the inner shaft, and so on. The same thing, but in the opposite order, occurs when the vehicle decelerates.

Engaging and disengaging the clutch discs (with the clutch discs DSG 6 work in oil - this is the so-called "wet clutch") and shifting gears in the DSG is controlled by a mechatronics that combines a hydraulic system, a set of mechanical rods and servo drives and an electronic unit that, based on sensors, determines the algorithm of the box.

DSG 7 is a seven-speed robotic gearbox DQ200 with a double dry clutch 0AM, which differs from the 6-speed DSG in the presence of a 7th gear and a hydraulically controlled double dry clutch. In addition to other design advantages, this design allows, first of all, to significantly reduce the amount of required transmission. In the DSG-7, it is only used for lubrication and not for cooling the clutch. The result: higher efficiency and therefore lower fuel consumption.

Repair of automatic transmissions of all brands, including CVT variators, multitronics with the ability to grind cones and restore the oil pump, automatic transmissions DSG: 02E, 0AM, 0B5, MPS6 (6DCT450) with clutch adjustment, even used

Repair of valve bodies, control plates, automatic transmission mechatronics with the possibility of programming for your car

Repair of DSG mechatronics with test at the stand and programming the firmware version for your car

Repair of electronic boards and automatic transmission ECU

Repair of torque converters, restoration of used parts (oil pumps, planetary gears, housings, cones, drums, etc.), on high-precision equipment

Supply of original and non-original, reconditioned and used spare parts

Contract, rebuild and used automatic transmissions

Delivery in Moscow and Moscow region

Evacuation of the car for repairs up to 100 km from the Moscow Ring Road FREE OF CHARGE

• When buying spare parts for automatic transmissions, a specialist consultation is free.

Modern life cannot be imagined without cars, and city traffic should be as comfortable as possible for the driver. Ease of driving is provided with the help of various transmissions (automatic transmission, robotic gearbox).

The robotic box is very popular because of the smooth movement and economical fuel consumption, the presence of a manual mode, which allows you to adjust the driving style to the needs of the driver.

The principle of operation of the checkpoint DSG

DSG is a manual gearbox equipped with an automatic gear change gear and two clutch baskets.

The DSG box is connected to the engine through two clutches located axially. The odd and rear stages function through one clutch, and the even ones through the other. Such a device provides a smooth change of stages without a decrease and interruption of power, carrying out a continuous transmission of torque from the motor to the driving axle of the wheels.

During acceleration in the first stage, the gears of the second gear are already engaged. When the control unit transmits a command to change the gears, the gearbox hydraulic drives release one clutch and clamp the second, making the transfer of torque from the engine from one stage to another.

Thus, the process takes place up to the extreme stage. When the speed decreases and other conditions change, the procedure is carried out in the reverse order. The change of steps takes place with the help of synchronizers.

The step change in the DSG box is carried out at a high speed, inaccessible even to professional riders.

What is mechatronic in automatic transmission

The control of both clutches and the change of stages is carried out using a control unit consisting of hydraulic and electronic units, sensors. This unit is called Mechatronic and is located in the gearbox housing.

Sensors built into Mechatronic monitor the condition of the gearbox and monitor the operation of the main parts and assemblies.

Parameters monitored by Mechatronics sensors:

• the number of revolutions at the entrance and exit of the box;
• oil pressure;
• oil level;
• working fluid temperature;
• the location of the forks for the inclusion of steps.

On the latest models of DSG boxes, ECT is installed (an electronic system that controls the change of stages).

In addition to the above parameters, ECT controls:

• vehicle speed;
• throttle opening degree;
• motor temperature.

Reading these parameters will prolong the life of the gearbox and engine.

Direct Shift Transmission Types

Currently, there are two types of DSG boxes:

• six-speed (DSG-6);
• seven-speed (DSG-7).

DSG 6

The first preselective (robotic) gearbox was the six-speed DSG, which was developed in 2003.

DSG-6 design:

• two clutches;
• two rows of steps;
• crankcase;
• Mechatronic;
• differential gearbox;
• main gear.

The DSG-6 uses two wet clutches that are invariably in the transmission fluid to lubricate the mechanisms and cool the clutch discs, thereby extending the transmission life.

Two clutches transmit torque to the rows of gearbox steps. The gearbox drive disk is connected to the clutches by a flywheel of a special hub that unites the stages.

The main components of the Mechatronics (electrohydraulic module) located in the gearbox housing:

• gearbox distribution spools;
• multiplexer generating control commands;
• gearbox solenoid and control valves.

When the position of the selector is changed, the gearbox distributors are activated. The stages are changed by means of solenoid valves, and the position of the friction clutches is corrected by means of pressure valves. These valves are the "heart" of the gearbox, and Mechatronic is the "brain".

The gearbox multiplexer controls hydraulic cylinders, of which there are 8 in such a gearbox, but no more than 4 gearbox valves function simultaneously. In different gearbox modes, different cylinders work, depending on the required stage.

Gears in DSG-6 change cyclically. At the same time, two rows of steps are involved, only one of them is not used - it is in standby mode. When the gear moment changes, the second row is immediately activated, switching to the active mode. Such a mechanism of the gearbox operation provides a gear change in less than a split second, while the movement of transport occurs smoothly and evenly, without sluggishness and jerks.

DSG-6 is a more powerful robotic gearbox. The torque of the car engine with such a gearbox is about 350 Nm. Such a box weighs under 100 kilograms. Gear oil for DSG-6 requires more than 6 liters.

At the moment, DSG-6 is mainly installed on the following vehicles:

• Seat (Alhambra, Toledo);
• Skoda (Octavia, SuperB);
• Audi (TT, Q3, A3);

DSG boxes are equipped with Tiptronic, which transfers the box to manual control mode.

DSG 7

DSG-7 was developed in 2006 especially for economy class cars. The DSG box weighs 70-75 kg. and contains less than 2 liters of oil. This gearbox is installed on budget cars with an engine torque of no more than 250 Nm.

At the moment, DSG-7 is mainly installed on the following vehicles:

• Audi (TT, Q3, A3);
• Seat (Leon, Ibiza, Altea);
• Skoda (Octavia, Fabia, SuperB);
• Volkswagen (Tiguan, Golf, Jetta, Passat).

The main difference between DSG-7 and DSG-6 is the presence of 2 dry clutch discs that are not in the transmission fluid. Such changes made it possible to reduce fuel consumption and reduce the cost of service.

Advantages and disadvantages of a robotic automatic transmission

A robotic gearbox has advantages and disadvantages compared to other transmissions.

DSG box advantages:

• reduced consumption of the fuel mixture (up to 10-20%);
• manual control capability, similar to;
• no power loss when changing steps;
• smooth movement of the car;
• high dynamic characteristics of a car equipped with a DSG box;
• reducing the time required for overclocking;
• the possibility of automatic and manual gear selection;
• comfortable control of a car equipped with such a gearbox;
• the absence of a clutch pedal and the usual selector lever, which does not cause difficulties when switching from a car to a classic one;

Disadvantages of DSG box:

• high cost of a car with DSG in comparison with cars equipped with other types of transmissions;
• occasionally, the robot slows down and does not keep pace with the dynamic acceleration of the car, making changes of steps with a slight delay;
• mechatronics is one of the weak points in the DSG box, malfunctions periodically occur in this unit;
• if a malfunction occurs in mechatronics, it needs to be replaced, since it cannot be repaired;
• reduced gearbox resource;
• mechatronics malfunctions are facilitated by frequent temperature drops, which is especially important in winter;
• the service life of DSG-7 and its components is noticeably shorter than in DSG-6;
• increased heating of the box due to the continuous activity of the preselector;
• an increase in the cost of servicing a robotic checkpoint;
• the complexity of repairing a robotic box, which not many service stations can carry out;
• not installed on SUVs and other powerful cars;
• high cost of repair, in some cases it is necessary to completely change the DSG.

• timely maintenance of the DSG checkpoint (replacement of the transmission fluid according to the regulations - no more than 60,000 kilometers, troubleshooting);
• warming up the robotic gearbox by short-term finding the car after starting in a standing position;
• smoothness of movement after warming up for 1-5 kilometers from the moment of the start of movement;
• avoidance of wheel slip;
• at stops for more than 1 minute, it is recommended to transfer the DSG gearbox selector to neutral mode;
• when driving on snow and ice, it is recommended to turn on the "snowflake" mode, if available;
• with dynamic driving and fast acceleration, it is advisable to move the selector lever to the "sport" position;
• when going through each maintenance, it is necessary to diagnose the DSG box and initialize;
• the accelerator pedal must be squeezed out smoothly, even in manual mode;
• acceleration is desirable in manual mode, and smooth driving and braking in automatic mode;
• placing the car from the DSG box into the parking lot in the "neutral" selector position with the obligatory engagement of the parking brake (handbrake).

The robotic gearbox is, in fact, an improved manual transmission, the switching of the stages in which occurs with the help of mechatronics based on various parameters read by the sensors. If certain recommendations are followed, the service life of the robotic box can be significantly extended.

According to its philosophy, DSG is a manual transmission, the change of stages in which occurs automatically. The driver has the ability to engage the manual shift mode, but in this case the gear change is carried out by the actuators by means of the control of the electrical signals. Such a design does not imply a direct connection between the gearshift lever and the forks for changing the driven gears. The clutch function is based on the same principle. The engine flywheel is disconnected from the gearbox drive shaft by a servo drive at the command of the automatic transmission control unit.

A distinctive feature of the DSG gearbox is the dual clutch. The lightning speed of gear shifting was achieved due to the fact that when the gear is engaged, the next step is automatically engaged. For example, when you engage 1st gear, 2nd gear is immediately followed. We can say that two separate clutch baskets work in tandem with a manual gearbox. It will be difficult for you to understand how the DSG works if you are unfamiliar with the car.

At the moment, there are two generations of robotic gearboxes from the VW-Group. Each of them has its own characteristics, so the device DSG 6 and DSG 7 should be considered separately.

DQ250

Volkswagen AG launched DSG production in 2003. The checkpoint was developed by the American company BorgWarner. According to the assurances of the designers, mechanical components "digest" up to 350 Nm. This made it possible to meet such a box on a car with an internal combustion engine of 1.6-3.2 liters. DQ250 is equipped with VW Golf, Scirocco Jetta, Passat, Sharan, Touran, as well as some Seat and Skoda models . The main components of the automatic transmission:

A dual-mass flywheel is used to transmit torque from the crankshaft. The main feature of the six-speed gearbox is the wet clutch, which in its structure resembles a torque converter type automatic transmission. Inside the body there are 2 clutch packs, which consist of discs rigidly connected to the flywheel of the internal combustion engine, as well as friction discs that mesh with the input shaft of the gearbox. If necessary, the clutch of the gearbox shaft and the flywheel, the discs are compressed under oil pressure. In idle mode, the discs rotate without engaging. The design uses an oil pump of a hydraulic type, which provides oil not only to the clutch, but also to the actuators of the mechatronics.

DSG 7

In 2008, the seven-speed DQ200, developed by the specialists of the Luk company, saw the light. The moment comfortable for the automatic transmission was limited to 250 Nm, so less powerful, light cars with a transverse engine are equipped with it. Of the features of the device, one can single out a clutch arranged in one housing with a dual-mass flywheel, which is no longer combined with an oil bath inside the box. The principle of operation of the dry clutch is identical to that used on machines with a manual transmission. This follows from the device:

Luk also replaced the hydraulic oil pump with an electrically driven system. This made it possible to almost 4 times reduce the filling volume of oil (1.7 liters versus 6.5 liters for DSG 6).

DQ500

The third generation of the automatic transmission was developed by Volkswagen specialists. The manufacturer claims that it is capable of "holding" up to 600 Nm, so such transmissions are installed on the Transporter 4 × 4, Tiguan and many other models from the VW-Group. The designers returned to the wet clutch type.

Control system

It is the Mechatronic that controls the processes taking place inside the DSG. System components:

• input sensors fixing the position of the gear shifting forks, shaft rotation speed, oil pressure and temperature readings, throttle valve opening degree, etc .;
• electronic control unit;
• an electro-hydraulic unit, which is a complex of actuators. It includes spool valves, solenoid valves, oil pressure control valves, multiplexer.

Putting the puzzle together

It remains to consider only some of the features of the DSG device, which make it possible to understand how the preliminary engagement of the next gear is implemented. The main secret is that the gearbox has two input shafts. They are located coaxially (one passes inside the other) and each is connected to its own clutch.

One of the shafts is designed for an even number of speeds, the other for odd steps and reverse gear. In travel mode, the wheels are connected to only one input shaft. The amount of torque, that is, the transmission, is determined by which gear of the secondary shaft is currently connected to the primary shaft. At the moment when one of the clutches connects the input shaft to one of the output shafts, the second output shaft rotates freely, which makes it possible to select the next gear through the synchronizers. When the mechatronic technician decides that the moment has come to engage the gear, he will open one clutch and immediately engage the second. Exactly the one whose shaft is already connected to the gear wheel of the next gear.

The type of drive installed in the vehicle determines the layout of the wet clutch. A more compact option is concentric (friction discs are located in the same plane). For rear-wheel drive cars, a parallel arrangement of couplings is used (they are located perpendicular to the shaft, the packages are one after the other). The type of drive axle determines the layout of the gearbox itself.

Danger of buying

It should be admitted that the smoothness of switching and the speed of switching is very expensive for many car owners with DSG. Major breakdowns:

• DQ250 - Quick Failure of a Dual Mass Flywheel. The problem here is not the DSG, but the unreliable design of the flywheel element. The appearance of vibrations accelerates the failure of the double clutch;
• DQ200 - Flywheel issue fixed. But a dry clutch wears out much faster. Reducing the amount of oil leads to frequent overheating. The dual clutch does not tolerate constant sharp accelerations very badly. Designers, trying to extend the life of the automatic transmission, programmatically underestimate the characteristics of the internal combustion engine, smooth out reactions to a sharp depression of the accelerator pedal;
• overheating is a common problem for all DSGs, but the worst case in this regard is for automatic transmissions with a dry clutch;
• malfunction of mechatronics. Typical breakdown for DQ200 and DQ250, but there are precedents with DQ500;
• breakage of the axle of the differential satellites is a problem that has migrated from the manual transmission of new images. Fortunately for the owners, the malfunction is infrequent.

How to be

Jerks or vibrations when switching, kicks, constant sounds and non-engaging gears can catch the owner of a new car already from 30 thousand km. The trouble-free operation of the DQ200 rarely lasts more than 70 thousand km. The DQ250 is capable of running over 100,000 km during normal operation. This situation is really scary, because the resource of a torque converter type automatic transmission is often not limited to 250 thousand km. Some models, with regular oil changes and careful operation, wind up to 400 thousand km. At the moment, the best DSG transmission is the DQ500, which is installed on all-wheel drive cars. The front-wheel drive layout is more prone to overheating. Much, of course, depends on the conditions in which the car is driven. What harms a robotic checkpoint:

• prolonged driving in traffic jams (especially in summer);
• dynamic driving with sharp accelerations;
• incorrect chip tuning.

Now you know what DSG is. In addition to the above information, owners can be advised to change the oil every 30 thousand km in a gearbox with a wet clutch. This will significantly extend the service life. The question of the advisability of buying used cars with DSG deserves special attention.

Motorists have long been accustomed to two types of transmissions - automatic and manual. At the beginning of the 2000s, boxes of a different type appeared on the roads, "preselective", or, in other words, DSG (English abbreviation for Direct Shift Gearbox). Such units are the merger of manual transmission and automatic transmission.

1. What is DSG box

The driver selects the gears, and the electronics itself controls the clutch and gives the command to change gears. A distinctive feature of such units is a double clutch and five shafts.

This solution made it possible to achieve the same acceleration and maximum speed as with a conventional manual gearbox. It would be correct to say that DSG is the next step in the development of a manual transmission. Such nodes are also often called "robots".

2. The device and technical subtleties of DSG boxes

DSG boxes are divided into two types - DSG-6 and DSG-7, the first is a six-speed version, the second is a seven-speed one.

The DSG-6 has a large torque and operates on a “wet” basis. The mechanical parts are immersed in an oil bath, while the oil circulates, thereby cooling the clutch assemblies and discs.

Such gearboxes are installed on vehicles with increased power:

• Volkswagen Golf, Volkswagen Eos $
• Skoda Octavia;
• Audi TT, AUDI Q3.

DSG 7 is a dry box. Differences from DSG 6 - in reduced torque and dry clutch, transmission oil is used only to lubricate the clutch discs. They are installed on low-power cars or on those in which the torque does not matter much. Due to the lack of normal cooling, they are disliked by motorists.

Examples of cars with seven-speed "robots":

• Volkswagen Passat, Volkswagen Transporter;
• Skoda Fabia, some Octavia;
• Audi A3.

The principle of operation of robotic boxes ("robots") is as follows:

When the first gear is engaged, its gear is blocked, the clutch closes and the moment is transmitted to the gearbox, at the same time the gears of the second gear are blocked. It turns out that two gears work simultaneously, but the second clutch is open and ready to be engaged. At the command of the on-board computer, the discs of one clutch open and the other is turned on. Next, the gears of the third gear are blocked. As a result, the box is constantly ready to change the next gear. When slowing down, the cycle repeats, only in the opposite direction.

The common unit of such boxes is mechatronics, a unit that includes sensors, hydraulics, and electronic components. He monitors the readings of oil pressure, the position of the gears, speed and other parameters and, based on this, decides whether to shift to an up or down gear.

3. Advantages and disadvantages of "robots"

The robotic gearbox has many pros and cons.

The pluses include:

• almost instant gear change;
• Manufacturers declare fuel economy (controversial, perhaps in comparison with a conventional "automatic");
• There is no engine power take-off, as with manual transmission control;
• Manual control.

There are also many disadvantages:

• The repair cost is high;
• Unreliable mechanical part even in new models;
• Expensive and complicated oil change procedure in DSG-6 boxes;
• Poorly tolerates aggressive driving style.
• cars with such a box are more expensive than conventional hydromechanical "automatic" and "mechanics".

For example, let's take a low-cost foreign car Skoda Octavia with an engine capacity of 1.4 liters.

The price for a complete set with mechanics is 1,034 thousand rubles, they already want 1,074 thousand rubles for a box with DSG, however, the manufacturer claims a fuel economy of 0.1 liters for every hundred kilometers. In a dealership, a "robot" will cost 40-60 thousand more expensive than conventional mechanics, 10-20 thousand more expensive than an automatic machine.

4. Opinions and reviews

Feedback from the owners of such cars is extremely contradictory. On the one hand, the barricades are satisfied with the choice of motorists, on the other hand, they are disappointed and trying to dissuade them from such an ambiguous acquisition. The State Duma even recorded an attempt to completely ban DSG 7 boxes in Russia. The argument was made by concern for citizens, deputies expressed the opinion that such a box is not safe for drivers. Fortunately, it didn’t even come to an initial hearing.

DSG proponents cite arguments such as “correcting mistakes” by DSG manufacturers (dubious merit), fast gear changes that do not depend on driving skill, low fuel economy, stable operation at low temperatures, positive dynamics. Ill-wishers are countered by the fact that they have incorrectly read the instructions for the car. Indeed, manufacturers recommend, in contrast to hydromechanics, to include neutral in traffic jams or at traffic lights. However, these are just tips.

There are much more opponents and more weighty arguments. Unreliability of software, difficult maintainability, often it is impossible to repair at all, the entire unit changes, and this affects the cost. "Garage" repairs are excluded, if even a conventional automatic transmission can be repaired in a car workshop with competent employees and a set of tools, then no one will take on DSG except for official dealers. Women complain about rolling back in traffic jams, men complain about the impossibility of a quick start from a traffic light (a tribute to reliability, when the first gear is connected, the box "thinks").

At the second speed, vibrations are felt, extraneous noises are heard in the box. A common phenomenon is a breakdown due to firmware, for example, "brains" stop recognizing even transmissions. It is believed that such systems are poorly compatible with gasoline, behave a little better with diesel fuel. In the heat on "dry" boxes clutch discs overheat, they cannot be repaired, only for replacement. It is not for nothing that the people say this: DSG - Two Clutches a Year.

There are far more bad reviews than positive ones. The negative nature of the responses is clearly visible. On the other hand, if everything were really so bad with them, such boxes would not have received such distribution, and judging by the models on which they are installed, there are still a lot of them. Perhaps the automakers do not admit their mistakes, again, re-equipment of conveyors is a costly business, but making people believe in quality and reliability is the work of marketers and PR services.

5. Conclusions

The decision on choosing a robotic gearbox is made exclusively by the future owner. If you are not a fan of aggressive driving, you are ready to spend at an authorized dealer, you don’t like the “lethargy” of automatic machines, but you also don’t want to lose comfort because of the clutch pedal - DSG is fine. Again, in pursuit of a customer, such boxes usually come with an increased warranty. For example, Volkswagen claims 150 thousand kilometers without repair. Those who like to leave abruptly from a traffic light are better off looking in the direction of the "mechanics". If small jolts and fuel consumption are not critical, buy a car with a conventional automatic transmission.

In Russian conditions, DSG does not take root very well. Perhaps, soon the engineers of corporations will find solutions to many problems, as has happened more than once, but so far "robots" are the most common lottery. Play it or not - the choice is yours. But if the question arose only about the DSG, then the choice of a six-speed model is preferable in terms of reliability and dynamics.