Which is better, dry or wet dual clutch? Why? Hello

Wet dual-clutch is better than dry clutch and ** is also higher.

Wet dual clutch refers to a multi-plate clutch with two sets of clutches, one large and one small, coaxially assembled. They are assembled in a sealed oil chamber filled with hydraulic oil. As a result, the wet clutch structure has better modulation capacity and excellent hot melt performance, and can transmit more torque without damage.

However, due to the factors of layout and friction materials, the overall size of the wet dual clutch is larger than that of the dry dual clutch, which is not conducive to the layout of the vehicle powertrain.

1. Wet dual-clutch is better than dry type, and ** is also higher.

2. The difference with wet dual clutch is that the clutch plate working environment is different.

3. To talk about the advantages: the wet dual-clutch is stable and mature, which can not only achieve fast and smooth, seamless gear shifting, but also at low speeds because of the oil to help dissipate heat, so there will be no overheating. Cons:

Naturally, it is also because the wet dual-clutch structure is complex, the volume and weight are relatively large, the manufacturing cost is much higher than that of the dry dual-clutch, and the maintenance is relatively time-consuming and laborious, and the liquid must be replaced regularly.

All dual-clutch transmissions can be divided into three parts: dual-clutch, gearbox, and control (spool valve box). The clutch part is divided into dry and wet.

Dry double clutch means that the two clutch plates and the intermediate pressure plate are directly exposed to the air, relying on air flow to dissipate heat, and the combination and disconnection of the clutch are driven by the slide valve box to push the clutch push rod K1 and K2 to hold.

Dry dual-clutch and wet dual-clutch have similarities and differences, of course, it does not mean that who is better than the other, each has its own advantages and disadvantages.

Dual-clutch transmissions are divided into dry dual-clutch transmissions and wet dual-clutch transmissions. The principle of both dry and wet transmission is basically the same, with two clutches working in turns.

However, the connecting medium of the driving disc and the driven disc of the clutch is different, and the dry dual clutch relies on air. The clutch discs of the dry dual clutch are in direct contact with the engine flywheel. Because of poor heat dissipation, dry dual clutch is prone to the risk of high temperature or even ablation of clutch plates in congested urban areas.

At this level, the wet dual-clutch transmission technology is more mature.

The wet dual-clutch is fluid-dependent. Wet dual clutch disc, refers to the clutch disc soaked in the transmission oil, from the technical maturity and reliability, wet double clutch because the clutch disc works in the hydraulic oil, the oil plays a certain heat dissipation effect, so the use of more stable. The wet dual-clutch structure is complex, the manufacturing cost is high, and its power transmission efficiency is not as high as that of the dry type.

DCT is a dual-clutch gearbox assembly, which can be called DCT regardless of whether it is dry or wet.

The advantages of a dual-clutch transmission are as follows:

1.Quick gear shifts. The dual-clutch transmission has a very short shift time, which is faster than that of a manual transmission, in less than a second.

2.Fuel efficient. The dual-clutch transmission eliminates torque interruptions, which means that the engine's power is always being used and always there.

Optimal work, so you can save a lot of fuel. Compared to traditional planetary automatic transmissions, fuel economy is better and fuel consumption can be reduced by about 15%.

3.Comfort. Because of the fast gear shift, every gear change in DCT is very smooth, and the frustration is so small that it is difficult for the human body to notice.

6.During gear shifting, there is almost no loss of torque.

7.When the high-gear gear is ready, the upshift is extremely fast, reaching an astonishing 8 milliseconds.

8.Regardless of the throttle or operating mode, the shift time can reach at least 600 milliseconds (from odd to odd, or.

It takes about 900 milliseconds to go from even to even, e.g. from 5th to 3rd gear).

The disadvantages of dual-clutch transmissions are as follows:

1.Cost issues. The structure of dual-clutch transmission is complex, and the manufacturing process requirements are relatively high, so the cost is relatively high. So we see that the dual-clutch transmissions are equipped with some mid-to-high-end models.

2.Torque issues. Although the dual-clutch gearbox can definitely meet the requirements of the general vehicle in terms of the torque it can bear, it is still not enough for intense use.

Because if it is a dry clutch, it will generate too much heat, and if it is a wet clutch, the friction will not be enough.

Wet dual clutch: refers to the dual clutch is a large and a small two groups of multi-plate clutches coaxially installed together, they are installed in a closed oil cavity filled with hydraulic oil, so the wet clutch structure has better adjustment ability and excellent hot melting, it can transmit relatively large torque.

Hello, dry clutch and wet test have their own advantages and disadvantages, the advantage of dry is that the clutch plate is not easy to slip, the disadvantage is not durable, the advantage of the wet test clutch plate is that the clutch plate is durable, the clutch wear is not so bad, more durable, the disadvantage is that it is easier to slip, the acceleration is not good, thank you.

Brother thinks too much! Either way, you won't feel any difference! Stay safe and don't speed!

The difference between Volkswagen dual-clutch dry and wet.

Dry dual-clutch transmissions and wet dual-clutch transmissions, their comparison is undoubtedly better for wet dual-clutch transmissions. Wet dual clutches cost much more than dry ones. According to common thinking, the performance of a high stupid answer must be good.

In the current situation of the flood of family cars, many people have experienced dry dual clutches, but most people generally feel that it is a dry dual clutch and think that there are more recommendations for wet dual clutches. Next, we mainly look at the comparison of dry and wet clutches in terms of cooling, cost, energy utilization, load torque capacity, and later maintenance. Cooling effect.

As the standard for dividing wet and dry clutches, the cooling method is undoubtedly the biggest difference. The dry clutch has poor air cooling effect, and the transmission is prone to overheating when changing gears frequently. The wet clutch has a good oil cooling effect, and the transmission is not easy to overheat.

Structural costs. The transmission structure of the dry clutch is simple, and the power is directly transmitted through the friction plate, which has a small mass and low cost. The wet clutch needs to be loaded with oil pumps, cooling oil pipes, etc. for oil cooling, which has a large mass volume and high cost.

Efficiency-wise. The dry clutch has a simple structure and high transmission efficiency of hard connection, which is conducive to energy consumption; The working environment of the wet clutch is a liquid environment, and the power transmission partially overcomes the hydraulic pressure, and the partial conversion heat is absorbed, the transmission efficiency is not high, and the energy consumption angle is not very good. Torque transmission.

The dry clutch has a simple structure, connects hardware, and has weak torque resistance, so it is not used in high-torque vehicles, and the maximum torque is generally left and right; The complex structure of the wet clutch determines that it can withstand large torques, and is often used in high-power, high-performance sports cars. The Bugattiwell and McLaren P1 are powered by a seven-speed wet dual-clutch transmission. Post-maintenance.

The dry clutch has a low cost, but a high failure rate, and the manufacturing cost of a wet clutch with more daily maintenance is high, but the stability is good, the failure rate is less, but the maintenance cost is generally higher. Regardless of the clutch, routine maintenance is essential. Now the dual clutch can be developed up to 8 gears, and this gear can only be wet, but as the number of stops increases, the wet and dry structure is greatly limited.

Although the wet dual-clutch transmission is expensive, it has a high value and is more reliable in terms of quality maintenance, and can withstand the impact of high-power torque. For a recreational sports car, a wet dual-clutch transmission is the best choice.

<> "Dry clutches do not need to be soaked in oil, and power is transmitted directly through the clutch pressure plate. The advantages are fast shifting, better stability of wet gearboxes than dry gearboxes, and lower relative failure rates. However, the maintenance cost in the later stage is relatively high, and the transmission fluid and filter element must be replaced every 60,000 kilometers The two main types of dry and wet gearboxes belong to direct shift transmissions.

The reason why they are popular is because of their advantages such as fast shifting, fuel savings, advanced technology, etc.

The method of distinguishing between wet and dry clutches is mainly to check whether the friction plates of wet and dry double clutches contain lubricating oil. If the friction plate of the clutch is placed in the lubricating oil, it is wet, and vice versa, the dry dry clutch and the wet clutch are the same in terms of working principle and basic structure. There is no essential difference between a dry clutch and a wet clutch transmission.

The principle of dry and wet transfer stops is basically the same, and the two clutches work alternately.

The difference between dry and wet clutches 1, with the difference of the working environment Dry and wet dual clutches, the difference between dry and wet dual clutches is that they have different clutch plates. Dry dual clutches rely on air, wet dual clutches rely on oil [1] The friction plates in the dry clutch scale do not have a sealed oil groove and need to rely on air cooling to dissipate heat. [2] The two sets of clutch plates of the wet clutch are in a sealed tank to absorb heat by soaking the transmission oil of the clutch plates.

The wet dual clutch is more stable to use, because the clutch plates work in the hydraulic oil, which has a certain heat dissipation effect. Due to poor heat dissipation, dry type is prone to the risk of high temperature of clutch plates or even clutch plate ablation in crowded urban areas. Therefore, at this level, the wet dual-clutch transmission has a high degree of technical maturity.

2. Difference in response speed [1] The dry clutch is driven by the direct contact of the metal plate, which makes the power transmission more direct, the metal plate is compressed, the transmission ratio is increased, and the effect is directly significant [2] For the wet clutch, the oil is used as a "middleman" to increase the speed from the driving disc to the oil centrifugal force, and then to the acceleration of the driven disc, adding a set of procedures. As can be seen from the structure of the clutch, the wet clutch is more complex, and the complex structure means higher energy loss, so the transmission efficiency of the wet dual clutch transmission is lower, which takes up more engine power, and it also means higher fuel consumption when other factors remain the same. The structure of the wet tank surplus double clutch is complex, the manufacturing cost is high, and the power transmission efficiency is not as good as that of the dry type.

3. Torque bearing difference [1] The metal friction plate of the dry clutch cannot withstand too much torque. If the stress is too great, it is easy to damage the friction plate. Therefore, the dry clutch can only be used for small displacement, low torque output of the model!

The master summed up: there are no such problems with the wet clutch at all. For family vehicles, family cars with a displacement of 200 N·m and supercars with a displacement of more than 1,000 Nm can be perfectly competent.

Wet clutch applications can be seen even on many large diesel engines and electric motors.

Wet dual-clutch and dry dual-clutch have their own advantages and disadvantages.

1. Transmission efficiency

The dry dual-clutch is driven by the direct contact of the metal sheet, the power transmission is more direct, the metal sheet is pressurized, the transmission ratio is increased, and the transmission effect is remarkable. However, the wet dual-clutch soaking in oil will increase the transmission resistance, so the transmission efficiency is not as good as the dry dual-clutch.

2. Light weight and low manufacturing cost

The wet dual-clutch gearbox must have a hydraulic pump, lubricating fluid, cooling pipe and external cooling system, while the dry dual-clutch will have more advantages in terms of manufacturing cost and light weight because of the saving of the relevant hydraulic system.

3. Heat dissipation

Because the dry dual clutch is air-cooled, it can only be cooled by empty brother burning gas, while the wet dual clutch is immersed in oil, that is, water cooled, which is obviously more efficient than the dry dual clutch, which is also the reason why the dry dual clutch is prone to failure.

4. Withstand torque

The metal friction plates of a dry clutch are not oil-lubricated like a wet clutch. If it is subjected to excessive stress impact, it can easily cause damage to the friction plate. As a result, dry clutches can only be used in vehicles with small displacements and low torque outputs.

Even, in order to adapt to the dry clutch, some vehicles deliberately output the torque of the engine in a low gear to protect the transmission clutch.

Advantages and disadvantages of dual-clutch gearbox:

Advantages: 1. The dual-clutch gearbox combines the advantages of manual transmission and automatic transmission, without using torque converters, and instead adopts two sets of clutches, and through the alternating work of the two sets of clutches, the effect of backlash-free gear shift is achieved.

2. Because there is no torque converter, the power of the engine can be fully exerted, and the two sets of clutches work alternately with each other, so that the shift time is extremely short, and the power fault of the engine is very limited.

3. Because the shift is more direct and the power loss is smaller, its fuel consumption can be reduced by more than 10.

Disadvantages: 1. Because the hydraulic torque converter is not used, and the "semi-linkage" action of the manual transmission cannot be realized, the insufficient torque at low speed will be completely exposed for the small displacement engine.

2. Because the dual-clutch adopts computer control, it belongs to an intelligent transmission, it needs to send an electronic signal to the engine in the process of upshifting and downshifting, and after the engine replies, it can cooperate with the engine to complete the upshift and downshift. The use of a large number of electronic components also increases the probability of failure.