High-speed robotic transmission s tronic. S-Tronic Audi gearbox, reviews and specifications. S tronic automatic transmission S tronic- What is it

As you know, since 2002 DSG boxes installed on Volkswagen cars, Skoda and Seat.
At the same time, Audi began to serially install the S-tronic transmission on its cars.
At the same time, all the listed companies are included in a single concern - the Volkswagen Group.
Quite expectedly, such a “coincidence” has become the reason for numerous conjectures and disputes. Let's try to clarify the situation.

Given the relatedness of the companies, it really makes no sense to look for serious differences between the C-tronic and the DSG.

Moreover, many manual transmission models are complete twins.
This list includes: DSG-7 (DQ-200), DSG-6 (DQ-250) and DSG-7 (DQ-500).
However, the brand has four rings and own developments.
We are talking about transmissions that are designed for a longitudinal arrangement of the engine.

Due to the transverse layout, prior to 2008, existing DSG versions did not cover all the lineup.
To solve this problem, Audi has released a box version of the DL-501.
Its characteristics are the same as the DQ-500, and the design is adapted to the longitudinal placement of the motor.
Used by DL-501 only on powerful all-wheel drive vehicles Audi.

The second unique development was the DL-382. With 400 Nm of maximum torque, the box is available in two versions: for front-wheel drive (F) and all-wheel drive (Q) cars.

Therefore, to the question what is the difference between S-Tronic and DSG, cannot be answered unambiguously.

In general, these are identical units released under different trade names.
However, some Audi models nevertheless, they are equipped with exclusive boxes that have no analogues in the DSG line.
These gearboxes can be distinguished by factory indexes: 0B5, 0CK, 0CL, 0CJ.

Our specialized service provides diagnostic and repair services for DSG (S-tronic) of all generations.
To sign up for a visit, you just need to send an "online application" or call the contact number.

The main disadvantage of modern automatic transmission is the loss of power and dynamics when shifting gears. Each Auto giant has its own developments in the construction of robotic automatic transmissions: Toyota - Multimode, VAG - DSG, Ford - PowerShift

The main meaning of the robot is that the automation itself, with the help of actuators, presses the clutch at the right time. But the delay when shifting gears was too big. Therefore, the engineers decided to introduce two clutches into the box. Due to this, S-Tronic shifts gears without loss of power (shifting occurs in a fraction of a second, the technical performance of the car itself increases accordingly). There is no switch box at all.

Principle of operation

Odd gears are tied to the first clutch, as well as reverse. To the second - even. The principle of operation of two clutches is as follows: starting off in first gear, the automation has already engaged the gears of the second gear, which are currently spinning at idle. As soon as the computer has determined the moment of switching to the second speed, the valve bodies instantly release the first clutch from engagement and press the second one, this operation takes place almost instantly and there is no traction break. The box has switched to the second speed, and the automation has already prepared the transition to the third, as soon as a signal is received from it, the car will instantly switch to this speed.

Audi S-Tronic Transmission

By reducing shift times, the S-Tronic dual-clutch transmission increases dynamic characteristics car, and also pleases the driver with its instant response to pressing the accelerator pedal.

Advantages

No loss of time for switching - reduces the acceleration time of the car;
Fuel consumption is lower than the standard manual transmission - due to automatic selection optimal speed engine operation;
No power cut when shifting - the illusion of an endless transmission.

Change of oil

According to the manual, the oil in the gearbox is filled for the entire service life. But we live in Russia!

Gearbox pan gasket
Two filters: internal and external
Rubber O-ring for external filter cover
Oil 4-6 liters depending on the box

Most owners simply renew their oil without changing filters. Drain the oil, fill in new in the same amount. They go for a week and update again. That's the whole procedure.

In services, they wind up the price of replacement work, or they sell you expensive oil.

S-Tronic adaptation

Breaking the entire forum and talking with the service workers, I came to the conclusion:

Adaptation helps;
Adaptation helps, but not for long;
Adaptation doesn't help.

On the Ford vehicles, MultiMode from Toyota, etc. In this article, we will look at the S-tronic gearbox, the problems, advantages and features of this automatic transmission.

Read in this article

S-tronic gearbox: what it is and how it works

So, the S-tronic box is a preselective robot and is installed on Audi models. Given that Audi is part of concern VAG, it becomes clear that the transmission is actually an analogue of the well-known DSG (Direct Shift Gearbox). However, there are also some differences.

The S-tronic gearbox is usually installed on cars with all-wheel and front-wheel drive, and the R-tronic box is often installed on Audi, which differs from its counterpart in the presence of a hydraulic drive.

As in the case of DSG, S-tronic has two clutch discs, which allows you to change gears very quickly, the power flow is practically not interrupted when switching, high fuel efficiency and comfort are achieved, and acceleration dynamics improves.

If we talk about the S-tronic device, we should highlight:

two discs;
two secondary shafts (for even and odd gears);
complex electronic system controls (sensors, );
(mechatronics), which is the actuator.

Simply put, the C-tronic box on an Audi is two manual gearboxes that are combined in one housing. Even gears are implemented on the shaft of one box, while the other shaft is responsible for odd ones.

There are also two clutch discs. As long as the vehicle is in one gear (even or odd), the corresponding disc is in operation, while the other clutch disc is disengaged. However, the next gear is already pre-selected and engaged. This is the basic principle of operation of the preselective gearbox.

At the moment of switching, the working clutch is quickly disconnected and the second one is instantly connected. As a result, upshifting or downshifting occurs instantly, the driver does not feel jerks, delays, shocks, etc.

To make it clearer, let's imagine a car on the mechanics, which accelerates from a standstill in first gear. For such acceleration, a pair of first gear gears is involved. Next, the driver will squeeze the clutch and independently turn on the increased (second or even third).

In the case of a preselective robot, while the car is in first gear, the gears in second gear will also already be engaged with each other, but the clutch will not be engaged.

After the box thus reaches the 6th or seventh gear (highest), the switching process will occur in the reverse order. While the car, for example, is moving in 7th gear, 6th will also already be selected and almost engaged. By the way, the robotic box is similar to where, unlike the manual transmission, you can change gears only in strict sequence.

As for the mechatronics, which allows you to create the right pressure in the system and hydraulic cylinders under the control of the ECU, the entire system is tuned to achieve maximum transmission efficiency at the same time as a high level of comfort for the driver. We add that there are also robotic boxes gears with an electric drive, however, the electric drive is put exclusively on budget car models.

Pros and cons of the S-tronic box

Having figured out what S tronic is and how this type of unit is arranged, you can consider the strengths and weak sides this automatic transmission. Let's start with the advantages of a preselective transmission:

high acceleration dynamics, since the gears are switched in 0.8 ms, which is very fast. A car with such a gearbox accelerates smoothly and dynamically;
noticeable fuel savings (up to 10%) compared not only with hydromechanical automatic transmissions and CVTs, but also with manual transmissions, which reduces the cost of maintaining the vehicle.
this box works so that the driver and passengers do not feel the moment of gear shifting. In terms of comfort, the preselective robot is close to the variator;

As it may seem at first glance, DSG or S-Tronic boxes, as well as similar analogues from other manufacturers, are the best option, since they most successfully combine positive traits mechanics and classical automata. However, in reality, this design has serious drawbacks that do not allow preselective robots to displace other types of automatic transmissions.

The disadvantages of S-Tronic include the high initial cost of a car with this gearbox, low resource and insufficient high reliability transmission, the complexity and high cost of repairs, as well as the need to carry out regular maintenance gearboxes.

Considering that structurally the robot is still the same mechanics, there are no special complaints about the box itself in terms of reliability. However, do not forget that, as in the case of mechanics, the clutch is a "consumable".

Also, the device of such a robot assumes the presence of numerous servomechanisms and actuators. In practice, these elements cause the owners of preselective transmissions a lot of problems.

First of all, in the box, the robot, unlike the manual transmission, needs to be changed more often transmission oil and it must be done correctly. Also, with wear, the gearbox may not operate as smoothly, jerking, vibration, bumps or dips when shifting may occur.

In this case, the banal replacement of clutches and oil in the box in many cases does not help, often you have to change the valve body itself, check the condition of the preselector, etc. At the same time, the replacement of mechatronics is expensive. Furthermore, new block also does not always become a 100% solution to the problem.

Summing up

As you can see, the preselective robotic gearbox is a kind of hybrid of manual transmission and automatic transmission. On the one hand, it is based on a reliable "mechanical" design, instead of an expensive one, the usual clutch units are used, etc.

However, there is also a valve body (mechatronics) and a number of servomechanisms, the box itself works according to very complex algorithms. As a result, the design is not only expensive and complex, but often.

As a result, we note that even taking into account certain shortcomings, the S-tronic or Audi R-tronic robotic box is able to provide high performance accelerating dynamics combined with fuel efficiency and comfort. As a result, this type of gearbox is actively installed on cars brand Audi which belongs to the premium segment.

Concept and design of preselective boxes

Every transmission has certain strengths and weaknesses. The main disadvantage of the classic "automatic" is the opening of power during the transition from one gear to another. To eliminate this shortcoming representatives of the automotive industry are developing modernized automatic transmissions, where it is possible to change gears without this opening (gap). This led to the appearance of preselective boxes.

Their idea is quite simple. The work of a manual transmission with a pair of shafts was taken as the basis for the creation. In fact, this box has two clutches to eliminate the power gap when switching between gears. This solution not only helped to increase the dynamic performance, reduce the consumption of gasoline and / or diesel, but also increase the safety of the car when overtaking and performing other maneuvers at speed.

Today, Audi cars are equipped with 7-speed preselective robotic boxes, which are called S-Tronic. This unit has proven itself in the market, is considered reliable, technologically advanced and one that contributes to increased comfort when driving a car.

Compact dimensions

One of the strengths of the preselective 7-speed gearboxes created by the Volkswagen concern is relatively small dimensions unit. Thanks to this feature, this robotic gearbox can be used on compact vehicles with limited engine compartment. That's why S-Tronic is in demand today and in various small cars, where the installation of a full-fledged six- or seven-speed "automatic" is extremely difficult.

Yes, in the city compact car Audi brand thanks to the development of the preselective unit, it became possible to use multi-stage automatic transmissions or manual transmissions, which contributes to the realization of the dynamic potential of the engine, fuel economy, and increased safety.

How does S-Tronic work?

Structurally, this development Volkswagen Group closer to manual transmission which are equipped with a robot - automatic device, switching steps. In cars with S-Tronic, the use of steering-wheel paddles (switches for manual change) is supposed to be used, although automatic mode also copes with the tasks quite effectively. The process of both automatic and manual shifting takes a fraction of a second, and there is no loss of power, since two clutches are involved.

The 7-speed S-Tronic for Audi is distinguished by the presence of a computer control system that monitors all parameters of the transmission. If any problem occurs, for example, fails, then the computer will display on dashboard a warning. Thanks to this feature, not only the operation of the car is simplified and the comfort of the driver is increased, but it also becomes possible to respond to breakdowns in a timely manner and reduce the cost of maintenance and / or repair of the unit.

Contemporary diagnostic equipment used in service centers, also contributes to the rapid identification of a malfunction and its elimination if the warning about the problem is of a general nature (there is a warning from the transmission computer, but without specifying the causes).

Another specific feature of this preselective box is the provision of greater maneuverability when cornering. When maneuvering to the right, the steerability increases due to the compression of the friction packs, and when turning to the left, there is a hydraulic lock, which gives the right wheel increased torque.

Reliability level S-Tronic

With all the advantages of this “automatic” box for Audi cars, the unit also has disadvantages, which should be taken into account by owners of cars with such a transmission. First of all, this automatic transmission has a complicated design, which allows you to achieve a smooth transition between speeds without jerks and gaps in power. For this, there are additional clutch and shafts. An increase in the number of moving parts leads to an increase in the risk of breakage, even though all elements are made of durable and reliable materials.

The second important feature of the 7-speed gearbox is the urgent need for timely qualified service. So, first of all, the unit needs a regular oil change, which should be done every 40-50 thousand kilometers. Ignoring this recommendation and the desire to save on service work will result in additional costs - it is likely that clutches will be required or fail. The S-Tronic box is also demanding on the type of oil - it is recommended to use only original brands.

Another specific feature of this box is the design differences from the classic "automatic machines". Because of this, a number of specialists and car service masters do not take up work with this unit, which should also be taken into account by potential buyers of an Audi car with this automatic transmission.

As you know, in the line of the German manufacturer Audi, to the models Audi Q7 and Audi A6 allroad quattro added at the time audi SUV Q5, the main components of which are borrowed from the Audi A4 ’08. The new Audi Q5 sports utility vehicle combines everything road car with the dynamics of a sports sedan. Superiority high technology Audi, made it possible to provide the Q5 SUV with all the necessary components and assemblies, for example, as: practical chassis, powerful engine, 7-speed automatic transmission (AT) with S tronic double friction clutch and dynamic Audi drive select dynamics control system, great design, high-quality finishing materials, taste and comfort of the cabin. All this taken together makes the sport utility vehicle excellent opportunities for driving around the city and off-road, providing the necessary comfort for its owners during any ride. But the most important component between the engine and the car was the equipped S-tronic.

Today we will talk in detail about the 7-speed automatic box gears (automatic transmission) with a double friction S tronic clutch in combination with a quattro drive, paired with a petrol two-liter turbocharged turbo engine FSI, power 211 Horse power. The automatic transmission has the trade name S tronic and service designation 0B5. S tronic is a fully synchronized electro-hydraulically controlled gearbox that provides automatic gear shifting without interruption in power flow, with very short shift times and continuous traction, provides considerable fuel savings and driving pleasure.

Why we decided to pay attention to this gearbox model is very simple, it is almost perfect in terms of dynamics, sportiness and performance.
The overall results of the clutch response in various modes are almost colossal, and in Dynamic mode it is achieved in just 79.893 miles of seconds.
The S-Tronic transmission has established itself as the fastest and most successful transmission in Audi vehicles. This box transmission is installed on almost all all-wheel drive models german mark who require high speed gear changes and instant response to changes in driving style.

The S tronic has a range gear ratios for gasoline engines 6, for diesel 8, while the seventh gear is overdrive, and maximum speed reached in 6th gear. The automatic gearbox provides up to 550 Nm at 9000 rpm, the weight is about 142 kg with a dual-mass flywheel and filled with oil.

We now turn your attention to design feature gearboxes. The S tronic automatic transmission consists of two main parts. The first part includes: drive plate, dual-mass flywheel, final drive differentials, two multi-plate friction clutches with electro-hydraulic control, clutches are oil-cooled by an internal ATF pump, mechatronic unit, ATF cooler connection, oil breathers. By disassembling and studying everything in detail, we note that the Mechatronic unit includes a control unit hydraulic system, the electronic unit control, part of temperature sensors and executive mechanisms. The second part is mechanical part or a seven-speed fully synchronized gearbox (seven-speed CVT), which has an independent lubrication system, center differential, oil pans, gear lever, side shaft, drain hole. Everything is shaped in such a way that creates a balance between the automatic transmission unit, its cooling and the highest reaction speed of gear shifting.

The S-Tronic transmission has proven to be the fastest and most successful transmission in Audi vehicles. This transmission is installed on almost all German brand all-wheel drive models that require high speed gear changes and instant response to changes in driving style.

For example, the Audi R8 sports car is equipped with a dual-split S-tronic transmission, as well as the well-known “charged” Audi RS models.

Paying more attention to the Audi R8 sports car equipped with the new S tronic, one can note the property of this box - it "jumps" between gears, which gives incredible dynamics when you press the gas pedal. Audi cars with such a gearbox, they “shoot” from a place with amazing power.

Audi R8 with a 5.2 liter engine installed under the hood accelerates from 0 to 100 km / h in just 3.5 seconds. But, despite its power, the car manages to save fuel. When the driver releases the gas pedal, the S tronic shifts to the last 7th gear, which saves fuel significantly. According to the manufacturer average consumption fuel sports car decreased by 1 liter per 100 kilometers.

1. Special oil pans for directional lubrication of bearings and gears allow operation at very low oil levels. Due to this, splashing losses (bubbling) are reduced, which improves (bubbling), which improves efficiency.
2. Primary shaft on three bearings;
3. New gearbox oil;
4. Self-locking center differential with asymmetric 40/60 dynamic torque distribution;
5. Space for installing an offset lip seal (when replacing all lip seals);
6. Cylindrical gear with specially shaped teeth, allowing angular deviation of the shaft axis in two planes (spiral teeth);
7. Side shaft with an inclination in two planes;
8. Switch for detecting the position of 1st, 2nd gear and gear reversing;
9. Sealed double row angular contact ball bearing for long life and low rotational resistance;
10. Welded bevel gear and special tooth shape due to angled side shaft;
11. Main gear / differential in front of the clutch module;
12. Clutch module - dual mass flywheel and single disc dry clutch as a structural group of the gearbox;

The torque reserve is about 350 Nm, ideal suitable motors 2.0l TFSI and 2.0l TDI.

Further in the materials, we will talk in detail about temperature sensors, hydraulic pressure sensors, gear shift sensors, input shaft speed sensors, the cooling system and protection of the gearbox, about correct operation Automatic transmission S tronic and much more.