When in 2002, Volkswagen introduced a double clutch box as an alternative to the classic automaton, there was no limit to admiration. It is understandable, such a solution has already tried to use, in particular, Porsche. Volkswagen also created an inexpensive and very effective version for conventional serial machines. It is thanks to the VW for the first time, cars with an automatic transmission became as dynamic as the versions with a manual box.
Today, DSG deserves applause. But after 10 years of presence on the market it became obvious that this solution is not suitable for everyone. Despite the fact that DSG is rated as a very successful and thoughtful design, after a while it may require the intervention of the mechanic. It will cost expensive, especially if the previous owner of the car did not take care of the regular replacement of the oil in the box. Moreover, the conditions of operation and the quality of care in the past is a big mystery.
History
DSG box (from English. Dual Shift Gearbox or German. Doppelkupplungsgetriebe) currently has several fundamental design options. The first version appeared at the turn of 2002 and 2003. It was 6- step box DQ250 gear, distinctive trait which is the grip of a wet type, i.e. Oil operating. The box is able to cope with torque up to 350 nm.
In 2008, a lighter and economical 7-speed version of DQ200 appeared on the market. It is able to digest only 250 Nm of torque. In 2010, the company presented the DQ500 box developed by own forces. All previous versions helped develop Borg Warner and LUK. The last modification was adapted for large torque (up to 600 nm), which allowed it to use even in commercial vehicles, for example, VW Transporter. Soon the box found its application and in small models of the brand. Designers returned to "wet clutches", but the number of steps remains the same - 7. Modification of the DL501 is applied in audi cars and denotes s-tronic.
Reliability
Unlike classic automata that do not need a clutch, nor in a solid flywheel, the DSG box uses both of these components. Two-mask flywheel must be reliable and have a resource, as in the case of working with a manual transmission. Theoretically, it is able to withstand at least 150,000 km. In reality, the flywheel may fail by passing only half the path from him.
As for the clutch, then "wet", thanks better coolingmay also serve 250-300 thousand km. Replacing the "dry" may be required when running 150-200 thousand km. But according to statistics, it happens earlier, in which the control system is to blame. Problems causes no electrical contact or damage to electromagnetic valves in mechatronics. The defect is usually manifested before the intersection of the mark of 100,000 km.
Fortunately, in many cases, the fault can be eliminated in specialized workshops. Official services for problems with mechatronome change the box to a new one. In conventional "garages" to repair the DSG box will not work. Regardless of the type, the box requires special tools. The accuracy of the factory manufacture is 5 microns, which requires extreme accuracy when assembling after repair.
Types DSG.
Number of gears: 6.
Maximum engine torque: 350 nm.
Clutch type: wet.
Exploitation
The box requires regular oil replacement and filter. Service must not less often than every 60,000 km. Dirty oil can destroy mechatronics.
Application
VW Golf V 1.4 FSI, 1.9 TDI, 2.0 TDI
VW Touran 2.0 TDI
SEAT Leon II 2.0 TDI
Skoda Octavia II 2.0 TDI
VW Passat B6 2.0 TDI, 2.0 TFSI.
Number of gear: 7.
Maximum engine torque: 250 nm.
Clutch type: dry.
Exploitation
The box has two independent oil circuits and the manufacturer does not provide for oil replacement. However, independent services recommend changing liquid.
Application
Skoda Fabia II 1.4 TSI
VW Golf V / VI 1.4 TSI
VW Golf VI 1.6 TDI
VW Touran 1.4 TSI
Skoda Octavia II 1.8 TFSI
VW Passat B6 / B7 1.4 TSI.
Number of gear: 7.
Maximum engine torque: 600 nm.
Clutch type: wet.
Exploitation
The box has a "wet" type clutch and requires regular oil replacement.
Application
VW Multivan 2.0 TDI
VW TRANSPORTER 2.0 TDI
VW Tiguan 2.0 TFSI
Typical malfunctions and repair costs
6-speed DSG, regardless of type, without any problems can pass 200,000 km. A lot of cars overcoming more than 300,000 km.
A dry clutch of a 7-speed box can be exhausted by 150-200 thousand km.
Two-hour flywheel, as a rule, wears before the clutch. It is 50% more expensive than the flywheel for mechanical boxes Transmissions.
For repair box after large miles (more than 300,000 km) may take about 1,500-2000 dollars.
DSG B. good condition You can purchase for 1000-1500 dollars. However, the number of proposals for secondary market Strongly limited.
Cost new box The official service is about $ 6,000.
As for the box itself, the control and control and management system associated with the operation of the mechatronics and control module are encountered. To repair the control module, you will need about 200-300 dollars. Recovery is possible only in specialized services.
Symptoms of malfunction of mechatronics
Highlight "PrndS" on dashboard and the transition of the box to "N" mode.
Hard switching on the 1st transmission.
Hard switching with the 3rd 2nd and 2nd on the 1st, sometimes cleaned clicks.
Vibrations on the 2nd gear during braking.
Shocks with successive shifts.
The sensation of loss of thrust when the revolutions fall below 2000.
Double clutch
Clutch DSG 7.
As a result of friction, dry clutch is faster (even up to 150,000 km). The cost of the new clutch (with replacement) is about 700 dollars, in the official service - about 1,300 dollars. Wet clutch are more durable. They can pass more than 250,000 km. The cost of their replacement is about 1000 dollars.
Mechatronics
Problems arise due to the loss of contact on the board in the soldering places. This is the result of the introduction in 2004 by the ecological methods of soldering. Experts extract the module and re-solder. The cost of the service is about 200 dollars.
Hydraulic block
It is a group of electromagnetic valves and oil pressure control circuit. Could fail electromagnetic valvewhich can be replaced. The cause of their malfunction can be metallic sawdust, resulting from clutch wear.
Two-masted flywheel
Its wear is the most common cause of dismantling the DSG box (sometimes even after 70,000 km). The durability of the flywheel reduces chip tuning and riding on very low revs. It costs more than a car flywheel without a DSG.
Attention! Regular oil replacement - a prerequisite good job Gearbox.
As a rule, the filter and oil are changed every 60,000 km in an automated gearbox with "wet clutches". For the 6-speed DSG DQ250 will be needed 5.2 liters. The cost of the service is about 200 dollars in the official service and $ 100 in the usual. The oil must be a special type designed for DSG boxes.
The manufacturer does not provide for replacement of oil in boxes with "dry clutch". but specialized Services Nevertheless, it is recommended to do it every 60,000 km. The exchange is subject to oil in automatic transmission (1.7 l) and hydraulic fluid of mechatronics. The cost of services is about 90 dollars.
New developments in the field automatic boxes Transmissions give a motorist great opportunities To select. And with the appearance on the market of a robotic gearbox DSG with make a choice getting harder - I want to try everything to find the best for myself. DSG - a new generation shift box, which combines all the best engineering solutions and modern technologies. We will analyze its device, characteristics, species, et al. Including on the instructions for use.
DSG gearbox
DSG selectorDSG gearbox (with it. Direkt Schalt Getriebe) was developed by the German concern Volkswagen. Literally DSG with German translates as: "Direct transmission box". The transmission is a type of a robotic gearbox using double clutch, combining the characteristics of both automatic transparents and mechanics. The process of switching the gear and turning on / off the clutch occurs automatically, and the driver only selects the necessary mode of movement using the gear selector lever.
DSG has long proven itself with positive in sports type cars, and for ordinary vehicle It is still new. Another transmission name is a preselective robotic double-clutch gearbox. It is the presence of two clutches and distinguishes this type of automatic transmission from its other fellow.
Device and principle of operation
Device preselective gearbox DSG Device automatic transmission of this type as follows:
- main transmission and differential;
- mECHATRONIC control module;
- double grip;
- internal primary shaft;
- outdoor primary shaft;
- two secondary shafts.
The design feature of the DSG is that it has two primary and two secondary shaft. Each secondary shaft is in engaging with the corresponding primary. Moreover, on one pair of the shafts are the gears of even gear, and on the other - odd. The primary shaft with even gears is made by the hollow and the primary shaft of odd gear is inserted into it. Each shaft is connected to "its" clutch.
Switching gear occurs as follows: The movement of the car begins on the first gear, but the second transmission is already in "combat readiness", that is, its gears are already engaged. As soon as the command is received about switching to the second transmission, odd clutch will dispel, and even clums. At the same time, the third gear is already included on an odd row to get started immediately after opening even clutch. Shift shift is carried out using synchronizers.
Thus, the transmissions switch at a speed not affordable even to the most experienced driver. Hence the name preselective gearbox (pre-in advance, Select - choice). Speaking by scientific language, thanks to this, the DSG gearbox during transmission is practically absent there is a break of power flow from the engine to the checkpoint. This has a positive effect on both the car acceleration and fuel efficiency.
Coupling and transmission switching controls the control unit. It consists of electronic and hydraulic control modules, as well as sensors. This unit, called the mechatronics, is located directly in the gearbox housing.
Built-in sensors control the status of the gearbox and follow the operation of the main elements. Tracking parameters: the speed of rotation at the input and output of the gearbox, the level of pressure and oil temperature, the position of the transmission plug. On the basis of signals of sensors, the mechatronics implements the transmission control algorithm.
Varieties DSG.
Currently distinguish two types of DSG boxes:
- six-speed;
- seven-step.
General scheme 6 and 7th stage DSG Initially preselative automatic transmission was a six-speed. It uses a double grip of a wet type (in use - "wet"). The clutch is constantly in the oil, which provides lubrication of parts and cooling discs, which, in turn, increases its resource.
Unlike a six-speed, grip in 7-speed DSG "dry", and oils for this automatic transmission take times three less. The oil pump with hydraulic drive is replaced here on electrical, which reduces energy consumption and increase the fuel efficiency of the engine. But the clutch resource will be lower.
Transmission DSG 6.
DSG 6 automatic transmission is not the last model from a series of robotic transmissions from Volkswagen. But it is considered more powerful - the engine torque is 350 nm.
Today, this checkpoint 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 model DSG appeared three years after the sixth and was made specifically for budget cars. DSG 6 is characterized by a large weight (about 95 kilograms) and large volume. transmission Oil. DSG 7 weighs about 70 kilograms and has a smaller volume of oil, which is positively reflected in the flow rate of fuel and the cost of regular maintenance.
Device 7-speed DSG DSG 7 is installed on cars equipped with a torque motor 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).
On the device "Dry" DSG no different from "wet". It is based on: the first and second secondary shafts, the main transmission, oil filter, flywheel and mechanical block. The feature of this automatic transmission is the presence of a two dry clutch clutch clutch, working not in the oil bath. Such a technical innovation made it possible to significantly increase the CPD of the box.
Differences of two generations DSG
DSG automatic transmission is undoubtedly one of the most advanced gearboxes. But despite the obvious advantages, she has and cons. We will analyze them in more detail, while paying separate attention both to "wet" and "dry" automatic transmission.
DSG 7 gearbox The main difference in the DSG of the two generations is caused by the value of the transmitted torque. This is due to the type of cars to which boxes are installed. About the weight of the box, oil consumption and fuel economy has already been written above. The seventh model in this regard will be better. But a longer service life and higher reliability will provide a six-speed box.
Now directly about what advantages characterize the DSG automatic transmission.
- The speed of switching gear.
- High acceleration dynamics due to almost continuous torque receipt on the wheel of the car.
- The smoothness of the car movement due to the fact that the switching of speeds occurs without jerks.
- The ability to work both in automatic mode and in manual gear mode, which gives the driver the ability to independently choose the style of movement.
Now as for the negative qualities of the DSG.
- The overall complexity of the design and, as a result, an increase in the total cost of the car, as well as a decrease in the resource of operation.
- Completeness of repair.
- Expensive and complex oil replacement, especially in a six-speed DSG.
- In DSG 7, the shift process up or down may be not so smooth. This is due to the peculiarities of the dry clutch.
- The inconvenience of the operation of the car in traffic jams, since when stopped, it is recommended to switch to neutral transmission.
Nowadays, you can meet vehicles of the most different designs, and not all of their mechanisms are distinguished by impeccable work. This article will talk about quite unusual, robotic gearbox - DSG 7. Everyone who has already come across it or is simply interested in various innovations of the automotive world, will surely be interested in obtaining additional information regarding this issue.
1. What is a DSG gearbox
Abbreviation "DSG" decrypt as DIREKT SCHALT GETRIEB. And literally means "the direct transmission box". In fact, it is only one of many types of preselective robotic gearboxes equipped with two clutches. In essence, the "robot" is the same, only control in it is automated.
When you want to switch the transfer, on-board computer Sends actuators a special "team", and they disconnect the slave clutch disc from the lead, thereby breaking the connection between force aggregate and box. As a result, after the movement of the shafts with gears, the discs are connected back, and the torque transmission process is resumed.
It should be noted that with this task the computer does not always cope quickly, and in most cases it takes longer than the driver would need. Therefore, if you are a fan of a dynamic ride, it is better to buy a vehicle with a conventional mechanical gearbox.
However, a double-clutch box is somewhat different from typical "robots". She invented the French engineer A. Kegresse, who was working in the personal garage of Nikolai II to the First World War. By the way, it was he who came up with a tracked-wheel engine for the royal "Pakcarde".
True, at the end of the 30s, when the principle of operation of the double clutch was described in detail Kegressee, the existing technologies have not yet allowed to construct a prototype, and they have been safely forgotten about the beginning of the 80s. The "new product" was tested on Ford cars (Fiesta and Ranger model) and Peugeot 205 brands, after which they put on racing Audi and Porsche.
2. What is the difference between DSG 6 and DSG 7
There are two kinds of direct transmission boxes DSG - DSG 6 and DSG 7. The first in 2003, a six-speed DSG 6 device appeared, in which the double grip worked in an oil bath ("wet" option). Such a large amount of oil turned out to be a significant problem, because precisely because of it, the engine lost its power. This nuance has become an impetus to the creation of a more advanced option of the CAT, which is DSG 7, presented company Volkswagen. in 2008.
This design allowed to reduce the amount of transmission oil used, because it is now applied only for lubrication, and not to cool the clutch. As a result, efficiency increases, and fuel consumption is reduced. However, the use of dry clutch led to the emergence of other problems that we will talk about a little later. In general, the only thing that distinguishes the 7th model from the 6th (in addition to the difference in the amount of oil) is the presence of the 7th transmission.
The DSG-7 gearbox is installed on the middle class cars, which are not so demanding in terms of speed and more designed for quiet and quiet ride.
3. Classic DSG 7 problems
There are a lot of problems with which you may encounter when using a classic "dry" gearbox DSG 7. The most common options include:
1. The appearance of the vibration of the machine when shifting gears from the first to the second and back. Cause: Clutch discs are too sharply closed, and it turns out that you throw a clutch (remember this moment when driving on a car with mechanical gearbox). IN this caseThe error occurs in the mechatronics block and is eliminated by flashing or replacing it.
2.
The emergence of vibrations on the 2nd transmission when moving at low speeds. Here, the source of the problem should be sought in the absence of a damper of oscillations on the second clutch. The engineers of the Volkswagen AG concern considered that it would be enough to install damper on the first clutch, because it is the most loaded. In addition, the area of \u200b\u200bhis clutch is greater than the friction area of \u200b\u200bthe second clutch.
After LUK company (was responsible for the creation of DSG-7), nevertheless released a clutch with a changed friction material, vibrations were really slightly decreased, but still not completely disappeared. Vag specialists try to correct this problem by updating softwareBut one mechatronics will not be able to solve the "disease" of the whole design. Simply put, rattling will accompany DSG-7 work before next model boxes.
3. The knocks in the gearbox when driving at low speeds is another common problem of this type of checkpoint. The official explanation of such a problem is based on the fact that the gearbox has a large number of tightly placed parts, and under certain conditions, due to the highly loaded parts and gears, vibration may appear. Considering that the number transmission fluid In this model, it is not very large, the transfer of sounds from the checkpoint outward is more intense.
True, the emergence of such noise affects the personal comfort of the driver and passengers, without reflecting on the performance of the CAT and its resource. This "inconvenience" is not even a defect, because of which employees of specialized workshops will not be able to help you. Therefore, before buying a vehicle with DSG 7 gearbox, decide: you can "survive" this noise or not.
4.
Shoes at the beginning of the move and when switching to "D" modes, "s", "m". In this case, the set of reasons for such behavior of the car is quite extensive. For example, a malfunction can be hidden both in the clutch block and in mechatronics or in the "Engine - PPC" node. Whatever it was, but the vehicle, followed by such a malfunction, is better to check in the car service.
5. Mechatronics breakdown can also have a variety of foundations. However, most often the culprit is the version of the software and the mode of operation of the car. Earlier models have suffered much more often from the mechanical breakdown caused by errors by.
Today, most of the problems managed to eliminate with the help of the constant update of "brains", as a result of which the electronics began to behave more obedient, although it was still not insured against operational errors. For example, a sharp start with a pinch brake can easily lead to a complete breakage of the box with a "dry" clutch.
As you can see, all listed problems are in the complex design of the DSG gearbox 7. It turns out that the Volkswagen AG concern's specialists sought to create an ideal checkpoint, and now pay for errors to the annual modernization of the transmission.
4. Car models with a problem box DSG 7
A sufficiently large number of cars of all cars was produced with a problem transmission gear DSG 7. It is only possible to remember Škoda Octavia, VW Golf or Audi A3 2014 release. However, this is still not all applicants for the emergence of the problems described above. Delighted into the essence of the question, it is impossible not to remember other cars that "lucky enough to become the owners of this transmission.
Among vehicles brand Audi. In this regard, models are allocated TT (2010-2014 release), A1 (2010-2014 G.V.), A3 (2008-2014 G.V.), A4 (2007-2014 G.V.), S4 (2008-2014 .), A5 (2007-2014 G.V.), A6 (2011-2014 G.V.), A7 (2010-2014 G.V.), Q5 (2008 - 2014) and R8 (2012 -2014 G.V.). Concern Seat. Installed DSG 7 on the model Ibiza (2008-2014 G.V.), León (2005-2014 G.V.) and Altea (2009-2014).
The creators of some models did not distinguish Skoda.. In particular, DSG 7 functions on ŠKODA Octavia (2004-2014 G.V.), Škoda Superb (2008-2014) and Škoda Yeti (2009-2014). However, most of all such boxes are installed on the product of the concern. Volkswagen.: Polo (Hatchback 2009-2014 G.V.), Golf (2009-2014 G.V.), Jetta (2005-2014 G.V.), Touran (2010-2014 GV), New Beetle (2013- 2014 G.V.), Passat (2005-2014 GV), Passat CC (2008-2014 G.V.), Sharan (2010-2014 G.V.), Scirocco (2009-2014 GV ), Tiguan (2011-2014 G.V.), Caddy (2010-2014).
Of course, each specific model You can choose to solve the problems of the DSG 7 gearbox problems, but it is sometimes easier to replace it with a more suitable, alternative option to the checkpoint. For example, for ŠKODA Octavia, 1.4 liters will fit well 1.4 (140) 6MT, and for AUDI A3 (1.8 liters), if necessary, you can select 2.0 (143) DSG6.
Despite the possible cons, many of the listed models of cars are successfully operated for more than one year, and problems with the PPC do not bother their owners. It is likely that, in your case, it is still not long to deal with the way problems described above, but, nevertheless, it is better to know about such an opportunity in advance. Naturally, before purchasing a car with this system, it is worth weighing everything "for" and "against" well, and it is better to additionally consult with a knowledgeable person.
Every year the automotive market offers a huge number of models, complete sets, modifications for every taste and wallet of the buyer. In addition to design, comfort and engine, a variety of proposed transmissions are presented. More and more manufacturers are equipped with cars as a mechanical, so automatic transmission. But if the mechanics differ in the main number of steps and gear ratios, then it is more complicated with automation. They are represented in several types, differing from each other by the principle of work, design, scope of application.
Most often, the buyer's choice drops on 2 types of automatic boxes - classical automatic transmission and DSG, which is also called a "robotic" box. Consider each type more and try to decide what of them is better.
Automatic
The classic hydrotransformer box is the most common from automatic transmissions used in cars. Its first samples began to be installed back in the 20s of the last century, but it became a full-fledged it only closer to the middle of the twentieth century, when all three major components were combined into a single mechanism. These main components are: hydrotransformer, planetary gearbox, hydraulic control unit.
In such a machine there is no rigid clutch, and the torque is transmitted due to the circulation of oil inside the torque converter. Switching steps occurs by means of a planetary type gear in a box, and the control function performs hydraulicock.
The popularity of this type is due to its sufficient reliability and maintenance. The focus should be based on the quality of oil and timely maintenance of the hydrotransformer.
On average, modern automatic transmissions have from 4 to 6 steps. The management includes the main modes:
- "D" - movement.
- "P" - parking. Used for long parking. Machine movement is impossible.
- "R" - reverse.
- "N" - neutral. Machine movement is possible. Used for short-term stops or for towing.
- "L" - movement on reduced transmission. Used B. sophisticated conditionsWhere the engine speed is important.
One of the weighty disadvantages of this type is price. Due to the complexity of the design, the cost of the box is quite high, which entails an increase in the price of the car. It is also worth noting that such a transmission is satisfied with heavy and adds an additional 20 - 30 kilograms of weight. This negatively affects dynamic characteristics and on fuel consumption.
But if the budget does not allow you to buy a car with automatic transmission, but I want exactly the machine, then alternative option Another type of transmission - DSG, also referred to as "robot", will be excellent.
DSG gearbox
Robotic transmission - So usually refer to the DSG box. The mechanism is similar to the usual manual transmission, only the function of switching the steps performs automation.
A distinctive feature of this type is the presence of two clutches. Each of them is responsible for its row of steps - even and odd. Starting the first transmission movement, one disk is closed, while the second is ready for switching to the next step. When the desired turns of the engine and speed reaching, the first disk opens and closes the second, translating the box to the next transmission. When the speed is reduced, the process occurs in the reverse order.
Thanks to such a system, the torque is transmitted as smoothly and without loss of power, which significantly reduces fuel consumption.
But there is such transmission and substantial disadvantages.
According to statistics, DSG more often than other CPP fails. One of the most problem seats In such boxes - clutch. Disks are subject to rapid wear, which is why clutch is slipped. From this, jerks appear when switching, failures, reduced dynamics. The electronic control unit also quickly produces its resource, disorders appear in the electrical circuit. All this entails high repair and maintenance costs.
What is common between automatic transmission and dsg
- Automation. Both transmissions are automatic and the driver is not necessary to be distracted by clutch disclosure, switching lever, gas pedal regulation. This is especially important for drivers who only received a driver's license and have not yet acquired enough mechanical box management skills.
- With a good state of transmissions, the switching occurs smoothly, comfortable, without jerks.
- Modes and their letter notation are identical.
Main differences
- In the automatic transmission there is no rigid engagement with the engine. In DSG, two clips responsible for their number of steps.
- Fuel consumption with DSG box lower than that of the machine. Switching the "robot" occurs as short as possible, which reduces the load on the engine.
- Car dynamics with automatic worse than with DSG. Due to the features of the clutch, the engine with automatic transmission is required more load for overclocking.
- Automatic transmission is more reliable robotic. According to numerous studies, the robot is most often susceptible to breakdowns.
- Price and service. DSG is cheaper, but requires significant repair and maintenance costs.
What type and for whom it is better
Automation is widely popular among women. In this, perhaps, both types of transmissions will not yield to each other. But it is also important to take into account the conditions of operation. Due to its design, the automatic transmission is suitable for urban conditions. Although the consumption of the automaton is higher, in conditions of DSG traffic jams are much more susceptible to wear.
DSG box is an automatic robotic transmission to switch the gear that does not only use Skoda car brand on its cars, and in general, the entire Volkswagen Group concern. What is it better than an ordinary machine, how does it work, what reliability and what is the resource? Many are asked such questions when they face the choice of a car and in particular transmission to it. Let's consider everything in order.
The DSG abbreviation in German is decrypted as DirektschaltGetriebe (DirectShlTGETRIBE) and in English Direct Shift Gearbox. It is also called preselatively called it.
Benefits
To improve comfort when moving, engineers of any concerns are trying to develop all new fixtures and devices. When the first box-machine was invented and released - it was a grand breakthrough. After all mechanical switch Requires additional effort when driving and work with two pedals: gas and clutch, and here you only need to put pressure on gas, or on the brake.
What advantages are DSG compared to mechanics or ordinary machine:
- the most important thing is that when gear shifts, there is no gap between them and thus the engine power loss (when switching on the mechanics, we squeeze the clutch, the transmission of thrust on the wheels stops, and the engine is running in this moments) providing best speaker acceleration and engine efficiency;
- the efficiency of fuel use rises to 10% compared with mechanics and a simple machine;
- the ability to switch transmissions both in auto and manual mode (which is not on all automata).
As you can see the main advantages two, but this allowed the DSG gearbox to become very popular and since the release of the first, and it was in 2003 for the present time more than a million were released.
Device and principle of operation
In essence, the DSG gearbox is a mechanic, but switching speeds, as written above, occurs without loss of power. The main difference from any other gearbox is the presence of two clutches in DSG. The principle of operation of which is that one when switching from one transmission to another, one clutch is turned off and the second at the same time turns on. Thus, uninterrupted transmission of torque on the wheels is ensured. Accordingly, it turns out that the primary shaft is also two. It follows that DSG is not alone, but two boxes, even and odd gears that work simultaneously. If you start moving, the first, and the second transmission, and the second transmission, only the grip on the second open is turned around. When a moment comes to switch, the grip is first turned off, and the second at the same moment closes. The same principle of work occurs on.
Why is it called robotic, because the transmission change process is automated? Because the MCP, in which the transmission change occurs on Avtomate, and this is our DSG, it is customary to call "robots" in order to distinguish from hydromechanical machines. Gear gears are switched by ordinary synchronizer couplings, but their forks are powered by hydraulic cylinders. Clutch drives also turn on and turned off with hydraulics, and a block called mechatronics with all this process.
The unit itself is a frame of the electronic and electro-hydraulic components, as well as the sensors of the entire DSG box control system. The principle of operation of the mechatronics is to track the readings of the input sensors, which are followed by the frequency of rotation of the shafts at the inlet and outlet of the box, pressure and temperature of the oil, and in what position the switching plugs are located. Based on all this electronic block The programmed by the electrohydraulic management action algorithm is being implemented.
Thus, as it was written above, the principle of operation of the DSG robot is reduced to a consistent inclusion of transmissions on both primary shafts.
Views
Currently, two types of preselective gearbox are used on the car brand Skoda, it is DSG 6 and DSG 7, six and seven-step respectively. DSG 6 was released first in distant 2003, and DSG 7 published in 2006.
A distinctive feature of DSG 6 (factory marking VW 02E) is a "wet" clutch - disk packages are constantly located and operate in an oil bath, which lubricates them and cools at the same time. It immediately has a positive effect on the clutch resource, and in general the entire box.
It should be noted that DSG 6 can digest and provide craving up to 325 Newtons, so it is usually used on powerful and large volumes of engines. This range begins from 1.4 liters and 140 horses and ends on V-shaped six, a volume of 3.2 liters with 250 horses. But how to be with budget cars, why are they such a heavy and powerful 6-step DSG 6, the weight of which is 93-kilograms. And then the engineers were invented and the new 7-step box was designed - DSG 7.
A feature that differs 7-step DSG 7 from DSG 6 is "dry" clutch. DSG 7 (factory number VW 0am) was developed specifically for low-power engines, the torque of which does not exceed 250 Newtons. If you compare the volume of the oil refueling, then the 6-step requires at least 6.5 liters, and DSG 7 cost 1.7 liters. Of the advantages of 7-speed DSG, the following can be noted:
- weight equals 70 kg;
- almost 4 times less than the oil used;
- large fuel engineering engine (by 6.5% according to the European ride cycle), due to the lack of need for permanent oil pump.
Therefore, the 7-step gearbox called DSG 7 very well began to be used in a pair with less powerful engines And its limit is such a plan as 1,4 TSI, the power of which is 122 hp, well, or 1.9 TDI, which is endowed with 105 horses.
disadvantages
Although the manufacturer guarantees the reliability of the DSG, yet some problems in its operation are found. What kind of problems are what kind and how to deal with them? Let's first see what flaws are when you buy a car with transmission DSG. And does it affect his reliability:
- the cost of the car is much higher than with simple mechanics;
- a very complex transmission design does not always allow it to repair and very often have to change it entirely that again is not cheap;
- the DSG 7 resource and its components are much lower than 6-speed, although the manufacturer guarantees its service life for 300 thousand km. (during this time it is believed that the whole car is wearing);
- the mechatronic unit may fail against frequent temperature drops, and their oscillation reaches from -30 in winter to +140 (the oil temperature in which it is located on 6-speed DSG);
- mechatronics itself is not amenable to repair, only a complete replacement;
- expensive oil replacement procedure on 6-speed transmissions;
- at the seven-speed, jerking when shifting gears from the first to the second (this defect is extremely rare, but still present);
- excessive overheating, as a consequence of the preset work.
Here is the actually the main drawbacks of the DSG, which, according to some, and undermine the overall reliability of the transmission. But such cases are a rare phenomenon. Nothing is eternally and has the right to wear. Similarly, it requires a regular replacement of grip in the manual transmission, which can be erased in one moment. So what to say about the fact that the "robot" DSG is bad - not worth it.
Proper operation and conclusions
Many ask a question: "How to use, or exploit this transmission"? There is no answer to him, since of all the actions you can do, it is correct to choose the mode with the help of a selector. You have no more contact with transmissions. Watch out for its work, it should be smooth if any kind of noise or twitching appear, you should immediately contact the service.
