Modern life cannot be imagined without cars, and urban traffic should be as comfortable as possible for the driver. The convenience of driving a car is provided with the help of various transmissions (automatic transmission, robotic gearbox).
The robotic box is very popular due to the smoothness of movement and economical fuel consumption, the presence of a manual mode that allows you to adjust the driving style to the needs of the driver.
The principle of operation of the DSG gearbox
DSG is a manual transmission equipped with an automatic gear change drive and has two clutch baskets.
The DSG box is connected to the engine through two clutches located axially. The odd and rear stages operate through one clutch, and the even ones through the other. Such a device provides a smooth change of steps without reducing and interrupting power, carrying out a continuous transmission of torque from the motor to the drive axle of the wheels.
During acceleration in the first stage, the gears of the second gear are already in mesh. When the control unit transmits a step change command, the hydraulic drives of the gearbox release one clutch and clamp the second, making the transfer of torque from the motor from one step to another.
Thus, the process goes to the extreme stage. When reducing the speed and changing other conditions, the procedure is carried out in the reverse order. The change of steps occurs with the help of synchronizers.
The change of steps in the DSG box is carried out at a high speed, inaccessible even to professional racers.
What is mechatronics in automatic transmission
The control of both clutches and the change of steps 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 the Mechatronic control the state of the gearbox and monitor the operation of the main parts and assemblies.
Parameters controlled by Mechatronics sensors:
- the number of revolutions at the input and output of the box;
- oil pressure;
- oil level;
- working fluid temperature;
- the location of the stage forks.
On the latest models of DSG boxes, ECT (electronic system that controls the change of steps) is installed.
In addition to the above parameters, ECT controls:
- vehicle speed;
- degree of throttle opening;
- motor temperature.
Reading these parameters prolongs the life of the gearbox and engine.
Types of Direct Shift Transmission
There are currently two types of DSG boxes:
- six-speed (DSG-6);
- seven-speed (DSG-7).
DSG 6
The first preselective (robotic) gearbox was a six-speed DSG, which was developed in 2003.
DSG-6 design:
- two clutches;
- two rows of steps;
- crankcase;
- Mechatronics;
- gearbox differential;
- 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 life of the transmission.
Two clutches transmit torque to the rows of gearbox steps. The drive disk of the gearbox is connected to the clutches by a flywheel of a special hub that combines the stages.
The main components of the Mechatronics (electro-hydraulic module) located in the gearbox housing:
- gearbox distribution spools;
- a multiplexer that generates control commands;
- solenoid and control valves of the gearbox.
When the position of the selector is changed, the gearbox distributors are switched on. The steps are changed with the help of electromagnetic valves, and the position of the friction clutches is corrected with the help of pressure valves. These valves are the "heart" of the gearbox, and the Mechatronic is the "brain".
The gearbox multiplexer controls the hydraulic cylinders, of which there are 8 in such a gearbox, but no more than 4 gearbox valves operate at the same time. Different cylinders operate in different gearbox modes, depending on the required stage.
Gears in the DSG-6 change cyclically. Two rows of steps are active at the same time, only one of them is not used - it is in standby mode. When changing the transmission torque, the second row is immediately activated, switching to the active mode. This mechanism of operation of the gearbox provides a gear change in less than a fraction of a second, while the movement of traffic occurs smoothly and evenly, without slowness and jerks.
DSG-6 is a more powerful robotic gearbox. The torque of a 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 specifically 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 not more than 250 Nm.
To date, DSG-7 is mainly installed on the following cars:
- 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 allowed to reduce fuel consumption, reduce the cost of service.
Advantages and disadvantages of a robotic automatic transmission
The robotic gearbox has its advantages and disadvantages in comparison with other transmissions.
Advantages of the DSG box:
- reduced consumption of the fuel mixture (up to 10-20%);
- the possibility of manual control, similar to;
- no power loss when changing stages;
- smoothness of the car;
- high dynamic characteristics of a car equipped with a DSG box;
- reduction of the time required for acceleration;
- the possibility of automatic and manual gear selection;
- comfortable driving, 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 with a classic one;
Disadvantages of the DSG box:
- the high cost of a car with DSG compared to cars equipped with other types of transmissions;
- occasionally the robot slows down and does not keep up with the dynamic acceleration of the car, changing 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 must be replaced, since it cannot be repaired;
- reduced gearbox resource;
- mechatronics malfunctions contribute to frequent temperature changes, which is especially important in winter;
- the service life of DSG-7 and its components is noticeably shorter than in DSG-6;
- increased box heating due to continuous preselector activity;
- increase in the cost of servicing a robotic gearbox;
- the complexity of repairing a robotic box, which not many service stations can carry out;
- not installed on SUVs and other powerful cars;
- the high cost of repairs, in some cases it is necessary to completely change the DSG.
- timely maintenance of the DSG gearbox (transmission fluid replacement according to the regulations - no more than 60,000 kilometers, troubleshooting);
- warming up the robotic gearbox by briefly keeping the car in a standing position after starting;
- smooth movement after warming up for 1-5 kilometers from the moment the movement starts;
- avoidance of wheel slip;
- when stopping for more than 1 minute, it is recommended to switch the DSG box 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 accelerations, it is advisable to move the selector lever to the “sport” position;
- during each maintenance, it is necessary to diagnose the DSG box and perform initialization;
- the accelerator pedal must be depressed smoothly, even in manual mode;
- acceleration is desirable to carry out in manual mode, and smooth driving and braking - in automatic;
- parking the car from the DSG box to the parking lot in the “neutral” selector position with the mandatory inclusion of the parking brake (handbrake).
The robotic box is, in fact, an improved manual transmission, in which the steps are switched using mechatronics based on various parameters read by the sensors. Subject to certain recommendations, you can significantly extend the life of the robotic box.
To date, DSG has become a very common automatic transmission model for VAG vehicles and we are ready to provide you with a large assortment of refurbished 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 GUARANTEE the repair and sale of DSG automatic transmissions, mechatronics, clutches, as well as further consultations, programming and assistance in adapting, commissioning and adjusting the clutch.
- DSG Models:
02E- 6 speed wet clutch
0AM- 7 speed with two clutches
0B5- 7 speed wet clutch all wheel drive
Audi: A3, A4, Q5, Allroad, TT
Volkswagen:
Skoda Fabia, Octavia, Super B
Audi: A3, A4, Q5, Allroad, TT
Volkswagen: Golf, Passat, Jetta, Touran, Transporter - T5
Skoda Fabia, Octavia, Super B
Estimated cost of DSG 6 and DSG 7 boxes:
- DSG 6 - 02E: mechatronics repair from 25.000 - 45.000 rubles. 12 months warranty
DSG 6 - 02E: repair mechatronic - 45.000 rubles. 12 months warranty
DSG 6 - 02E: repair automatic transmission 90.000 - 95.000 rubles.
DSG 6 - 02E: Used automatic transmission 70.000 - 80.000 rubles. 3 months warranty
DSG 6 - 02E: Clutch repair kit 15.000 rub. 6 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 second-hand replacement (turnkey) 23.000 rub. 6 months warranty
DSG 7 - 0AM: Clutch with N / O replacement (turnkey) 31.000 rubles. 12 months warranty
DSG 7 - 0AM: Clutch with OEM replacement (turnkey) 43.000 rub. 18 months warranty
- 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 rub. 6 months warranty
DSG 7 - 0B5: Clutch assembly kit 35.000 rub. 12 months warranty
- DSG 7 - 0BT / 0BH: mechatronics repair from 25.000 - 50.000 rubles. 12 months warranty
DSG 7 - 0BT / 0BH: repair mechatronic - 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 kit 25.000 rub. 12 months warranty
DSG Dual Clutch Automatic Transmission - Direct Shift Gearbox (DSG)
The Volkswagen concern was the first in this field. The design of such transmissions practically does not differ from each other for each of the manufacturers. Robotic gearbox DSG (Direct Shift Gearbox) is currently the most advanced automated transmission.
- 6 - 7 speed automatic DSG
During acceleration, the next gear is switched on electronically in advance, and remains on all the time. If it is necessary to change gear, the automation only opens the first clutch and closes the second - synchronously and extremely quickly. At the same time, the next gear is immediately engaged on the shaft with the first clutch, which will wait for the next transition to a step up. When braking, everything happens in reverse order.
- What is a 6 speed DSG (02E) - DSG 6!
When 1st gear is engaged, the clutch blocks the 1st gear on the driven shaft. Then the clutch closes, and the torque is transmitted through the internal input shaft to the gearbox. Together with the inclusion of 1st gear, the mechatronics (DSG control unit) blocks the gears of 2nd gear. Thus, two gears are engaged at once, although the 2nd gear is not engaged, because the clutch of the outer shaft is open. If it is necessary to shift to second gear, the DSG mechatronic opens the discs of the first clutch and closes the second one. Then the torque is already going through the external input shaft and second gear gears. In the meantime, the 3rd stage is blocked on the inner shaft, and so on. The same thing, but in reverse order, occurs when the car slows down.
Turning the clutch discs on and off (and the clutch discs DSG 6 work in oil - this is the so-called "wet clutch") and gear shifting 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.
- What is a 7 speed gearbox DSG DQ200 (DSG-7), DL500/1 (0B5) - DSG 7!
DSG 7 - DQ200 seven-speed robotic gearbox with 0AM dual dry clutch, differs from the 6-speed DSG in the presence of a 7th gear and a hydraulically controlled double dry clutch. In addition to other structural 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, not clutch cooling. The result: higher efficiency and thus lower fuel consumption.
- The main directions of our technical center:
Repair of automatic transmissions of all brands, including CVT variators, multitronics with the possibility of grinding cones and restoring the oil pump, automatic transmissions DSG: 02E, 0AM, 0B5, MPS6 (6DCT450) with clutch adjustment, even used ones
Repair of valve bodies, control plates, automatic transmission mechatronics with the possibility of programming for your vehicle
Repair of DSG mechatronics with testing at the stand and programming the firmware version for your vehicle
Repair of electronic boards and automatic transmission ECU
Repair of torque converters, restoration of used parts (oil pumps, planetaries, housings, cones, drums, etc.), on high-precision equipment
Supply of original and non-original, remanufactured and used spare parts
Contract, rebuild and used automatic transmissions
Delivery in Moscow and Moscow region
Vehicle evacuation for repairs up to 100 km from MKAD FREE OF CHARGE
- When buying spare parts for automatic transmission, expert advice is free of charge.
Payment by cash, bank transfer and credit cards!!!
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The DSG robotic gearbox (English spelling Direct Shift Gearbox, German - DirektSchaltGetriebe), despite all the claims, is currently the most advanced automated gearbox installed on mass car models.
The DSG box provides gear shifting without interrupting the power flow, which significantly improves its consumer qualities compared to other "robots". These qualities include the best acceleration dynamics and fuel economy (the engine does not idle).
Continuous transmission of torque from the engine to the drive wheels is achieved through the use of two clutches and their corresponding two rows of gears. The DSG transmission has six-speed and seven-speed designs. A seven-speed gearbox (torque up to 250 Nm) is installed on cars B, C and some D class models. A six-speed gearbox transmits torque up to 350 Nm and is installed on more powerful machines.
The design of the DSG gearbox includes a dual mass flywheel, dual clutch, two rows of gears, final drive, differential and control system. Structural elements are placed in the body (crankcase) of the box.
The double clutch provides torque transmission to the first and second rows of gears. On a six-speed gearbox, the clutch includes a drive disk connected through the input hub to the flywheel, and two friction multi-plate clutches connected through the main hub to the gear rows. The seven-speed gearbox has two conventional friction clutches.
On a six-speed gearbox, a wet-type double clutch, i.e. constantly in oil. The oil provides lubrication and simultaneous cooling of the discs, which significantly increases the clutch life.
The seven-speed gearbox is equipped with a dry clutch, which can significantly reduce the amount of oil refilled (from 6.5 liters to 1.7 liters), reduce energy costs and increase the fuel efficiency of the engine. For the same purpose, the hydraulically driven oil pump on the seven-speed gearbox has been replaced with a more economical electric pump. On the other hand, dry clutches are subject to more wear.
The first row of the gearbox provides odd gears and reverse, the second row is responsible for even gears. Each of the gear rows is a primary and secondary shaft with gear blocks. Primary shafts are located coaxially, while the primary shaft of the second row is made hollow and put on the primary shaft of the first row.
The gears on the input shafts are rigidly connected to the shaft. The pinion gears rotate freely. In this case, the gears of the primary and secondary shafts are in constant engagement. Synchronizers are located between the gears of the secondary shaft, which carry out the inclusion of a specific gear. To perform a reverse movement in the gearbox, an intermediate shaft with a reverse gear is provided. The drive gears of the final drive are also located on the secondary shafts.
Direct control of the clutch and gear shifting is provided by the control system. It includes input sensors, an electronic control unit and an electro-hydraulic unit as actuators.
Electronic and electro-hydraulic control units, as well as almost all input sensors, are combined into a single module called Mechatronic. The control module is located directly in the gearbox housing.
The input sensors monitor the input and output speed of the transmission, oil pressure and temperature, and the position of the gear shift forks. The electronic control unit, based on the signals from the sensors, implements the control algorithm for the electro-hydraulic unit embedded in it.
The electro-hydraulic control unit controls the transmission's hydraulic control circuit. It includes control spools, solenoid valves and pressure control valves, multiplexer.
The valve spools are actuated by the selector lever. Solenoid valves carry out gear shifting. Pressure control valves ensure the operation of the friction clutches. Solenoid valves and pressure control valves are the actuators of the transmission control system.
The gearbox uses a multiplexer device that allows you to control eight gear shift hydraulic cylinders using only four solenoid valves. In the initial position of the multiplexer, some hydraulic cylinders operate, in the working position, others, while in both modes there are common solenoid valves.
The principle of operation of the DSG transmission is to sequentially engage the gears of both rows. In this case, during the operation of one gear, the next gear is already selected and ready to be switched on.
New developments in the field of automatic transmissions give the motorist a great deal of choice. And with the advent of the DSG dual-clutch robotic transmission on the market, it’s becoming increasingly difficult to make a choice - you want to try everything to find the best for yourself. DSG is a new generation gearbox that combines all the best engineering solutions and modern technologies. We will analyze in the article its device, characteristics, types, we will dwell, among other things, on recommendations for operation.
DSG gearbox
DSG selectorThe DSG gearbox (from German Direkt Schalt Getriebe) was developed by the German concern Volkswagen. Literally, DSG is translated from German as: "Direct Engagement Gear Box". The transmission is a kind of robotic gearbox using a double clutch, combining the characteristics of both automatic transmission and mechanics. The process of shifting gears and engaging / disengaging the clutch occurs automatically, and the driver only selects the desired driving mode using the gear selector lever.
DSG has long proven itself on the positive side in sports cars, and is still a novelty for conventional vehicles. Another name for the transmission is a dual-clutch preselective robotic gearbox. It is the presence of two clutches that distinguishes this type of automatic transmission from its other counterparts.
Device and principle of operation
DSG preselective gearbox device The automatic transmission device of this type is as follows:
- main gear and differential;
- Mechatronic control module;
- double clutch;
- dual mass flywheel;
- internal primary shaft;
- outer primary shaft;
- two secondary shafts.
The design feature of the DSG is that it has two primary and two secondary shafts. Each secondary shaft is engaged with its corresponding primary. Moreover, gears of even gears are located on one pair of shafts, and odd gears on the other. The input shaft with even gears is made hollow and the input shaft of odd gears is inserted into it. Each shaft is connected to "its" clutch.
Gear shifting occurs as follows: the movement of the car starts in first gear, but the second gear is already in "alert", that is, its gears are already engaged. As soon as the command to shift to second gear is received, the odd clutch will open and the even clutch will close. In this case, the third gear is already engaged in the odd row, in order to start work immediately after the even clutch is opened. Gear shifting is carried out using synchronizers.
Thus, gears are switched at a speed not available even to the most experienced driver. Hence the name preselective checkpoint (pre - in advance, select - choice). In scientific terms, this means that the DSG transmission has virtually no interruption in the power flow from the engine to the gearbox when shifting gears. This has a positive effect on both acceleration of the car and fuel economy.
Clutch and gear shifting is controlled by the control unit. It consists of electronic and hydraulic control modules as well as sensors. This unit, called Mechatronic, is located directly in the gearbox housing.
Built-in sensors monitor the condition of the gearbox and monitor the operation of the main elements. Monitored parameters: speed at the input and output of the gearbox, oil pressure and temperature levels, the position of the gear shift forks. Based on the sensor signals, Mechatronic implements the transmission control algorithm.
Varieties of DSG
There are currently two types of DSG boxes:
- six-speed;
- seven-speed.
General scheme of 6 and 7-speed DSG Initially, the preselective automatic transmission was a six-speed. It uses a wet-type double clutch (in everyday life - “wet”). The clutch is constantly in oil, which provides lubrication of parts and cooling of the discs, which, in turn, increases its life.
Unlike the six-speed one, the clutch of the 7-speed DSG is “dry”, and this automatic transmission requires three times less oil. The hydraulically driven oil pump has been replaced here with an electric one, which reduces energy costs and improves fuel efficiency of the engine. But the clutch resource will be lower.
Transmission DSG 6
The DSG 6 is not the latest in Volkswagen's range of robotic transmissions. But it is considered more powerful - the engine torque is 350 Nm.
Today, this gearbox is installed on cars of the following brands:
- Volkswagen (Golf, Passat, Jetta, Touran, Tiguan);
- Skoda (Superb, Octavia);
- Audi (A3, Q3, TT);
- Seat (Toledo, Alhambra).
Transmission DSG 7
The seventh DSG model appeared three years after the sixth and was made specifically for budget cars. DSG 6 is characterized by high weight (about 95 kilograms) and a large amount of gear oil. The DSG 7 weighs around 70 kilograms and has a smaller oil volume, which has a positive effect on fuel consumption and the cost of regular maintenance.
7-speed DSG device DSG 7 is installed on vehicles equipped with an engine with a torque of up to 250 Nm. These include the following models:
- Volkswagen (Golf, Passat, Transporter, Caddy);
- Skoda (Fabia, Superb, Octavia);
- Audi (A3, Q3, TT);
- Seat (Ibiza, Leon, Altea).
According to the device, a “dry” DSG is no different from a “wet” one. It is based on: the first and second secondary shafts, main gear, oil filter, flywheel and Mechatronics unit. A feature of this automatic transmission is the presence of two dry friction clutches that do not work in an oil bath. This technical innovation has significantly increased the efficiency of the box.
Differences between two generations of DSG
DSG automatic transmission is undoubtedly one of the most advanced gearboxes. But, despite the obvious advantages, it also has disadvantages. We will analyze them in more detail, while paying special attention to both “wet” and “dry” automatic transmissions.
Gearbox DSG 7
The main difference in the DSG of the two generations is due to the amount of transmitted torque. This is due to the type of cars on which the boxes are installed. About the weight of the box, oil consumption and fuel efficiency have already been written above. The seventh model in this regard will be better. But a longer service life and higher reliability will be provided by a six-speed gearbox.
Now directly about what advantages characterize the DSG automatic transmission.
- Gear shifting speed.
- High dynamics of acceleration due to the almost continuous supply of torque to the wheels of the car.
- The smoothness of the movement of the car due to the fact that the gearshift occurs without jerks.
- The ability to work both in automatic mode and in manual gear shifting mode, which gives the driver the opportunity to independently choose the style of movement.
Now as for the negative qualities of DSG.
When they say DirektSchaltGetriebe, for some reason, the dark times of the Third Reich and the Ahnenerbe department, the Higher Unknowns and other occult nonsense of the secret SS department are immediately remembered. In fact, everything is much more harmless. The higher unknowns are fundamentally different synchronized shift gearboxes, the name of which in English interpretation sounds more soothing - Direct Shift Gearbox, DSG. This is a new word in automotive engineering, it was written in the tablets of history by Volkswagen AG and was the first in the world to launch mass production.
Higher Unknowns, or what is it - DSG gearbox?
In the photo - Direct Shift Gearbox (DSG) or a new word in automotive engineering
With all the claims and quibbles about this design, this is the most advanced gearbox on planet Earth. The highest stage in the evolution of transmission, unknown to many and terrible for competitors. Due to the high level of competition, perhaps, all the talk about its failure arises. The DSG gearbox has already raised its pen to sign the verdict on all existing automatic, CVT and manual transmissions. Why did the rest of the boxes annoy the engineers from Volkswagen so much?
A manual gearbox is a well-thought-out mechanism well adapted to modern powerful high-speed motors. With filigree use, it provides accurate and precise gear shifting, a fairly wide range of gear ratios, but one thing is bad in it - you need to constantly work with the lever, and catching the engine speed literally intuitively. Otherwise, with one inaccurate movement, one inaccurate throw of the clutch, the car twitches, comfort is lost, and most importantly - precious seconds and torque. The hydromechanical automaton, it seems, was called to solve these problems, but brought only new ones. Yes, the torque converter perfectly smooths out all the jerks when shifting gears, evens out the traction force, but the price of this comfort is the loss of a huge amount of power, excessive fuel consumption, as a result, the efficiency of this couple, engine and automatic transmission, falls to an unforgivably low level. High hopes were placed on a robotic transmission with an electric clutch and gear shift, but they did not materialize either in terms of comfort or power loss.
DSG Robotic Transmission Video
And the engineers of VW AG were not wiser for a long time. All the gearbox was missing for optimal performance was one more gearbox and one more clutch. DirektSchaltGetriebe, DSG, works exactly like this. While acceleration is in progress and the odd first gear is engaged, the even second gear is also already engaged, but not connected to the crankshaft flywheel. The transmission, in other words, is "pre-selected", which is why such boxes are also called preselective. As soon as the moment comes to shift to an increased, even, gear, it is enough to simply open one clutch and close the other. It takes a fraction of a second, there is no break in the flow of power, the car practically does not feel any jerks and drops in acceleration dynamics, and this is how this was achieved constructively.
The device and problems of the DSG gearbox
DirektSchaltGetriebe is a dual circuit gearbox, which means that it has as many as 5 shafts and as many as 2 clutches. Clutches can be wet and dry, it depends on which engine the gearbox is bolted to and how many steps it has. Such a box can also be controlled manually - using the Triptronic system or paddle shifters, as on most sports cars. In terms of smooth operation, DSG is no different from automatic transmission, and in terms of acceleration dynamics it is not inferior to mechanics with the most experienced driver. And this is an indisputable fact. A lot of tests and comparative tests were carried out, during which the DSG box showed its superiority over the mechanics both on the sports track and in the frequency of gas station arrivals. The difference in fuel consumption during the operation of the VW Golf R32 with both gearboxes, manual and DSG, was no less than 1.3 liters per hundred. And all due to saving torque, and the same Golf R32 accelerates to hundreds in 6.4 s, and with mechanics - in 6.6 s, but at maximum speed the difference in the gearbox is not visible - 247 km / h.
There are two types of DSG boxes - with wet and dry clutches. Wet clutch has its disadvantages in that a certain amount of engine energy is spent on overcoming the resistance of the oil bath. As a rule, this is a six-speed DSG, and it is installed on cars with higher torque and, accordingly, more powerful ones. DSG6 is installed on Volkswagen and Skoda Octavia with torque above 250 Nm and up to 350 Nm. Only on powerful and large engines does a six-speed DSG make sense. In 2008, Volkswagen introduced the seven-speed DSG7 for lower power and smaller displacement engines. Since then, it has become possible to install these boxes on small-capacity cars with a volume of 1200, 1400 cm³. The 7-speed transmission has a dry clutch, so there is no loss of power due to the oil bath. After 2008, the design of the six-speed boxes also changed. An electric drive was used on the oil pump of the hydraulic system, which made it possible to increase the efficiency of the engine by a few percent.
Problems with the DSG box are noted, judging by the reviews, only when the maintenance regulations, oil changes, and operation contrary to the instructions are not followed. Repair of such a box will not be cheaper than a machine. In the cold season, this box requires warming up, otherwise there may be jolts and jerks when switching from first to second gear until the box warms up. Another disadvantage of the 7-speed DSG is that it is not used with powerful engines. Maximum - 122-horsepower 1.4 TSI with two supercharged or diesel 1.9 TDI with 109 forces. Nevertheless, no one deprives you of the choice - you can buy the same Passat, Golf, Octavia, or Audi as with traditional mechanics, with a hydromechanical automatic machine, or with the Higher Unknown DirektSchaltGetriebe, preselective DSG gearboxes.
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Five years ago at the Frankfurt Motor Show, Kia unveiled the Kia GT concept sedan. True, the Koreans themselves called it a four-door sports coupe and hinted that this car could become a more affordable alternative to the Mercedes-Benz CLS and Audi A7. And now, five years later, the Kia GT concept car has transformed into the Kia Stinger. Judging by the photo...
In the Stavropol region again allowed to use hand-held radar
This was told by the head of the UGIBDD for the Stavropol Territory, Alexei Safonov, RIA Novosti reports. The head of the local traffic police said that 30 violations of the speed limit were recorded in 1.5 hours of work. At the same time, those drivers who exceed the permitted speed by 40 km / h and above are identified. At the same time, Safonov proposed introducing criminal liability ...
GMC SUV turned into a sports car
Hennessey Performance has always been famous for its ability to generously add additional horses to a “pumped” car, but this time the Americans were clearly modest. GMC Yukon Denali could turn into a real monster, fortunately, that the 6.2-liter "eight" allows you to do this, but the mechanics of Hennessey limited themselves to a rather modest "bonus", increasing the engine power ...
In St. Petersburg, a car was stolen without an engine and a roof
According to Fontanka.ru, a businessman turned to the police and said that a green GAZ M-20 Pobeda, which was produced back in 1957 and had Soviet numbers, had been stolen from the courtyard of his house on Energetikov Avenue. According to the victim, the car did not have a motor with a roof at all and was intended for restoration. Who needs a car...
Russian assembly of Mazda: now they will also make motors
Recall that the production of Mazda cars at the facilities of the Mazda Sollers JV in Vladivostok started in the fall of 2012. The Mazda CX-5 crossover was the first model that the plant mastered, and then the Mazda 6 sedans were put on the conveyor. At the end of 2015, 24,185 cars were produced. Now Mazda Sollers Manufacturing LLC...
The traffic police published new exam ticketsHowever, the traffic police decided today to publish on its website new examination tickets for categories "A", "B", "M" and subcategories "A1", "B1". Recall that the main change that awaits driver candidates from September 1, 2016 concerns the fact that the theoretical exam will become more difficult (and, therefore, you need to learn tickets more carefully). If now...
Throughout the history of the automotive industry, designers have always liked to single out a few unique in terms of characteristics and capabilities from the general mass of production models. At the present time, this approach to the design of cars has been preserved. To this day, many global auto giants and small companies strive to ...
What cars in 2018-2019 are most often bought in Russia
The number of cars on the roads of the Russian Federation is constantly growing - a fact that is confirmed by the annual study of sales of new and used models. So, based on the results of the study, which can answer the question of what cars are bought in Russia, for the first two months of 2017...
Which sedan to choose: Camry, Mazda6, Accord, Malibu or Optima
Powerful story The name "Chevrolet" is the very history of the formation of American cars. The name "Malibu" beckons with its beaches, where numerous films and television series were filmed. Nevertheless, from the first minutes in the car "Chevrolet Malibu" one can feel the prose of life. Pretty simple stuff...
