The manual transmission today has evolved. Various transmissions were invented. They made driving the car much easier. An important step in this direction is the creation automatic transmission transmission Later it was changed and improved. Now the driver does not need to think at what moment to switch to a certain gear.

But the engineers did not ignore the manual transmission. It has been improved and changed. New mechanisms appeared. The result of such active searches best option– sequential gearbox. In this case, transmissions can only be switched on in a certain sequence. To increase a gear, go up, to downshift, go down.

In English, sequential means “sequential”. In such a box you can only change gears from high to low or from low to high. This principle is provided for in motorcycles with foot control. When changing gears with your foot, it is problematic to perform complex manipulations. That is why in this case a simple algorithm is used: if the lever moves up, the gear increases, if down, it decreases. This option is very convenient.

The sequential gearbox differs from the standard one in that it only comes with two shafts. In this case, there are no synchronizers, and the gears are always straight-cut. They are needed in order to advance the clutches that directly engage the gears. The differences lie not only in terms of design, but also in operation. In order to engage a gear in the gearbox, you need to disengage the clutch. In a sequential gearbox, when going uphill or moving in a straight line, it is possible to change gears without disengaging the clutch.

Advantages of a sequential box

The sequential box has a lot of advantages:

• The box body is much smaller.
• Significantly more torque can be transmitted.
• The design can easily withstand variable loads.
• Switching occurs at high speed.
• Changing gears does not affect engine speed.
• The transmission retains power caused by heating elements.
• The load on the shaft bearings is quite light.
• Maintenance is as simple as possible.

Gears change only sequentially in the forward or reverse direction. You can only increase the gear in steps. For example, you cannot jump from first to third. The design of this box will not allow this to be done. Another significant difference between the sequential gearbox is that the secondary and primary transmission shafts are stacked. They consist of interconnected elements of an intermediate nature.

But the non-trivial switching mechanism inherent in this type of transmission forced the designers to start searching alternative ways gear shift.

And their efforts were not in vain - the family of gearboxes was replenished first with automatic transmissions, and then with other varieties - robotic, variable, sequential.

But it just so happens that the average car enthusiast can only talk with confidence about manuals and automatics. Much fewer motorists are aware of what a CVT or robotic transmission is. And there are very few who know how the sequential box works and works. We decided to fill this gap in automotive education.

What is a sequential type gearbox?

The classic manual transmission, despite some shortcomings, still occupies a dominant position in the automotive transmission segment. There is an objective explanation for this - mastering switching skills is quite simple, you just need a little practice. But the main thing is that such a gearbox gives the driver freedom of action: moving at the desired speed, he can switch to any gear without restrictions. For example, after accelerating, switch from third to fifth immediately, move away from second and even third, if there is a sufficient slope, brake sharply and engage second gear after fourth.

Of course, this cannot be called complete freedom - the selected gear must correspond to the load on the car and the speed of movement.

The sequential gearbox does not allow this. Its main difference from mechanics is the need to sequentially engage all gears, regardless of direction.

You may ask, what is the point of such a transmission? The answer will be very simple: to simplify driving. There is no contradiction in this - cars with a sequential gearbox do not have a clutch, so the driver does not need to think at all about which gear is currently engaged and which one needs to be engaged when accelerating or, conversely, when braking. As a result, the gear shifting process is noticeably accelerated, which can be called the main advantage of automatic transmission.

Strictly speaking, gearboxes of this type- an integral part of motorcycles, especially older generations, where switching is carried out by a foot pedal. But even today, for example, BMW motorcycles are equipped with precisely this type of transmission, which also evolves over time, becoming more advanced, trouble-free and convenient. Thus, seven-speed sequential gearboxes of the SMG model are currently produced. The first generation of such gearboxes has been installed on BMW E36 M3 cars since 1996, since 2001 SMG 2 has become the main transmission of the E46 M3, and the third generation is included in the E60 M5 package.

If, when using a manual transmission, an experienced and skillful driver spends about 0.6 seconds changing gears (the average is noticeably higher), then the use of modern sequential gearboxes can reduce this time period by approximately three times, to 0.2 seconds.

Of course, for the average motorist this is not critical, but for athletes such a gain in time is very significant, given that during the race they have to switch very often.

The idea that automatic transmission is more complex than mechanics should be considered a misconception. An automatic transmission - yes, it is indeed a very complex device, but the design of an SMG type transmission is simpler than that of a manual transmission. If only because there are no synchronizers here, we will talk about the design of sequential boxes a little later.

Thus, the correct answer to the question of what a sequential gearbox means is the following: it is a type of transmission in which the gears are shifted exclusively sequentially (1-2-3-4, etc.), both up and down, but but much faster, while there is no clutch pedal, and its role is played by electronics. At least in passenger cars.

Design, features, principle of operation of SKPP

ABOUT main feature You already know about a sequential transmission - this is the impossibility of changing gears in any order (or rather, the lack of the possibility of free choice). But what is the point of such a box? The fact is that the driver does not always have the opportunity to engage the desired gear by braking (when moving from a higher to a lower gear) of the car. Especially in cases where the number of gears is large (from six and above), which is typical for agricultural machinery, tractors, and heavy vehicles.

Since there is no clutch pedal (but not the clutch itself), this theoretically simplifies operation vehicle– there is no need to synchronize the movements of the left and right legs when changing gears. The clutch is controlled by receiving all the information necessary for this from sensors and sensors that monitor the degree to which the accelerator pedal is pressed and attempts to engage a certain gear. The ECU, analyzing this data, sends a corresponding signal to the actuator - the progressive automatic transmission unit, which adjusts the vehicle speed.

To have an idea of ​​how a sequential gearbox works, you also need to know that, unlike its mechanical counterpart, spur gears are used here instead of bevel gears. This mechanism has a higher efficiency due to reduced friction losses, but at the same time the torque is reduced. This disadvantage is compensated for by installing gears of larger diameter. Note that the noise level when operating a transmission with spur gears is much higher.

Finally, another feature of the sequential gearbox is the use of hydraulic servos, the function of which is to facilitate and speed up switching between speeds. True, servos are also used in robotic boxes, but instead of hydraulics an electric drive is used.

If on motorcycles gear shifting is carried out by a pedal, then in cars - by the usual lever or buttons (which are even more convenient to use, although this is a matter of habit). The location of the lever is either standard, on the center console, or on the steering wheel, which is typical for “Americans” and “Japanese”. Such a box is designated by the letter “S” (from the word

Sequence, which is translated from English as “sequence”, “sequential”).

In some variations of the sequential box, gear shifting can occur automatically. Typically, such automatic transmission systems can operate in three modes:

• standard mechanical, with manual gear shift;
• sports mechanical, allowing you to speed up the switching process;
• automatic, relieving the driver of the need to change gears (yes, there are analogies with an automatic transmission, but there are also many differences).

The operating principle of the sequential gearbox is based on the use of a gearbox, which has been modernized by equipping it with gears with straight teeth. Thanks to the presence of a hydraulic servo drive mechanism, the driver is not required to have high precision when changing the vehicle's driving mode, which further simplifies driving. All he needs to worry about is monitoring the load on power unit, making sequential switching during acceleration and braking without the participation of the clutch pedal.

How is a noticeable reduction in the time spent switching gears achieved? The thing is. What's on manual transmission When the lever is moved from one position to another, the drive mechanism rod is first tightened, then it is rotated, and only after that it is pressed. The sequential box uses a completely different principle - here two rods are activated simultaneously, one of which is pulled up, the other is immediately pressed. In other words, when switching from third to second speed, at the moment of switching, the third gear rod is tightened, and the second gear is pressed. As a result, the total switching time is reduced from one second (average) to 0.12 milliseconds.

Many motorists confuse sequential gearboxes with cam gearboxes. There really is a lot in common between them (spur gears of increased diameter and length, as well as the presence of end protrusions that serve as the basis for engagement with the cams), thanks to which it is possible to significantly reduce switching time. Cars with a cam transmission are more dynamic, but in this case a lot of experience is required from the driver to shift at the right time. Sequential transmissions do not have this drawback. It is for this reason that cam-type gearboxes are installed exclusively on sports cars, although no one forbids you to do so on a regular production car. The car designers of some Formula 1 teams have combined the advantages of both types of transmissions in one device, but, of course, it is at least inappropriate to compare the driving skills of the racers of this super series with ordinary drivers.

We have already examined at a conceptual level the main advantages of sequential boxes. It's time to discuss the advantages of this type of transmission in more detail. So, the main advantages of using such a checkpoint are as follows:

• no clutch pedal. It turns out that this is good not only for beginners, who may have difficulty using both feet when changing gears (situations when the brake is pressed instead of the clutch are common, and this is an almost guaranteed engine stop). Participants racing competitions on cars equipped with a sequential transmission, they are able to concentrate on the track without being distracted by the need to coordinate the movements of their arms and legs when changing;
• gear shifting occurs at least three times faster. Considering that the automatic transmission, which also lacks a clutch pedal, is much more thoughtful than a manual transmission, then sequential transmissions have no competitors in this regard. The switching itself here requires the driver to move the lever up when accelerating and down when reducing speed. It’s extremely simple: pull the handle up until we accelerate to 4-5 gears, or down until it stops completely. There is no need to think about which gear is currently engaged and which one should be switched to;
• the absence of a time delay when switching gears contributes to some extent to fuel economy. And although this effect is insignificant, it has an accumulative effect - this should always be taken into account;
• Modern sequential-type transmissions have already simplified vehicle control to almost a minimum by moving the control keys to the steering wheel. But it turns out that they offer an even more effective option - an automatic operating mode, when the driver does not have to think about changing gears at all - the electronics and a set of sensors will do all the work for him.

A sophisticated reader will probably have a very reasonable question: if sequential boxes are so good, why have they not yet become widespread?

The answer is trivial: along with the undoubted advantages, this type of transmission also has equally obvious disadvantages, which in most cases outweigh the advantages. Let's describe them:

• low resistance to high loads, without which it is impossible to imagine the operation of the transmission. No matter how easy the switching occurs, even with an automatic transmission, this must be done taking into account the appropriate speed limit - if you switch to third from a speed of 60-70 km/h, this will be a clear mockery of the gearbox. Regardless of the type. The design features of the sequential gear shift mechanism (in particular, the presence of a hydraulic servo drive) significantly reduce the ability of gearbox parts to withstand wear. Suffice it to say that on racing cars such transmissions become unusable literally after every stage. And this is an expensive pleasure: the cost of an automatic transmission is much higher than that of a manual transmission. But in order to gain speed, racing teams are forced to make similar expenses. This is unacceptable for a production car. And although here we are talking not only about making the car easier to drive, but also about increasing power and reducing fuel consumption, all this does not come in vain. The driver, as mentioned above, must shift correctly, feel his car, select the desired speed for moving from low to high gear and vice versa. If you have little experience, mistakes in using a sequential transmission will inevitably lead to its premature failure, and repairing such a box will cost you a significant amount. So you should not buy a car equipped with an automatic transmission if you do not have many years of experience driving a vehicle with an automatic transmission or manual transmission. It is also worth taking into account the fact that it will not be easy for domestic motorists to adapt to shifting gears, the gearbox lever of which is located not on the central tunnel, but on the steering wheel paddles. But these are minor things compared to the fact that even with careful use, the service life of sequential gearboxes is several times less than that of mechanical and even automatic ones;
• Such a transmission is also more expensive to maintain, which is also due design features. If we talk about the cost of spare parts/consumables, then the situation here is not at all rosy. And if you think that you can repair it yourself, then you are deeply mistaken here too. Moreover, if you do not live in a metropolis, then you will still have to look for a car service that will undertake the restoration of the automatic transmission.

Let's also talk about the main misconceptions associated with the mention of a sequential type gearbox:

• Many people believe that robotic and sequential transmissions are synonymous concepts. In reality, this is, of course, far from reality. Although the operating principle of both types of boxes is indeed similar, there are also more than enough differences. An example is the type of servo drive: for a robotic gearbox it is electric, and not based on the use of hydraulics. The robot box is equipped double clutch to eliminate jerks when switching gears, the sequential analogue does not need this;
• There is an opinion that automatic transmission and manual transmission always work in conjunction. This is also incorrect, although such a stereotype can be explained by the growing popularity of automatic transmissions equipped sport mode. In reality, the sequential gearbox does not always have an automatic operating mode, and it is even more wrong to assert that these types of transmissions are identical. The most striking example is racing cars;
• There is also an opinion that automatic transmission is an attribute only of racing cars, and certainly in combination with a cam mechanism. Yes, such a combination is typical for motorsport, but for quite a long time serial cars have been produced on which a sequential type gearbox is successfully used. And without a cam mechanism - it is truly the preserve of racing cars.

Scope of application of sequential automatic transmission

Initially, such boxes were indeed installed only on cars used in various motorsport disciplines. However, even today this type of transmission has no competitors in auto racing, allowing gear changes to be made as quickly as possible and without an intermediate drop in speed. A few tenths of a second (strictly speaking, at least half a second) is a lot where the winner is often separated from the runner-up by hundredths of a second. Add to this a hydraulic shift mechanism - and you get a truly high-speed transmission, albeit quite expensive.

But for more than two decades, automatic transmissions have also been installed on production cars. The BMW automaker turned out to be a pioneer here; currently, for example, the M3/M5 models from BMW or Mercedes-Benz C-class. Some people confuse such a transmission with an automatic transmission, calling it a “manual” version of an automatic transmission, which is fundamentally incorrect, and we have already talked about this. Owners of cars equipped with a sequential gearbox claim that driving a vehicle has become much easier, and precise engagement in gear depending on the driving mode is not required.

Many motorcycles are equipped with gearboxes that operate on the principle of sequential gear shifting, and this technology is more than 50 years old. Usually this is a lever switched by the foot, which has two positions: forward and backward. The neutral is located between them.

The sequential gearbox is also installed on agricultural machines (tractors, tracked vehicles). Here the shift lever is also located under the feet, like on motorcycles, but can also be installed on the steering wheel.

Finally, many models of heavy-duty trucks and other heavy special equipment are equipped with automatic transmission, in which the number of gears can exceed a dozen - it would be very difficult to control such a manual transmission.

Sequential - this word is quite difficult for a Russian-speaking person to pronounce, and all because it came to us from English (sequence) and means “sequential”. A sequential gearbox is most often one that can only change gears sequentially, for example, from first to second and higher, and also in reverse order. Let's look at the principles of operation of mechanical and automatic transmission and then we will move on to the sequential one in order to better understand it.

On most domestic cars a manual transmission is installed, so almost everyone has encountered it in practice, at least while driving in a driving school. This gearbox operates according to the following principle. The rocker can be installed in the neutral position, which is located in the middle between gears. And in order to start moving, you need to depress the clutch pedal and engage first gear. In the process of gaining speed, the movement is consistent.

But the driver can start from second gear if the road surface does not impede smooth movement and the engine allows such a maneuver. If the car does not start, we push it and can even turn the engine on in third and fourth gear. To reduce speed when turning, we can even switch from fifth to second. In other words, the main point you need to remember is that a manual transmission can shift gears inconsistently.

Automatic transmission

Engineers were once given the task of making it easier to drive a car, and it was then that the box was invented automatic switching transmission Its appearance significantly simplified the process of driving a car; the driver no longer needed to select a speed mode. The automatic transmission selects the gear itself, and the driver controls it only by pressing the brake and gas pedals. Driving a car with an automatic transmission is much easier and does not require special qualifications.

However, the process did not stop, which is why a more advanced cam sequential gearbox appeared. For its operation, a clutch pedal is also not needed, as in an automatic one, but its operation is based on completely different principles.

Sequential box

As mentioned earlier, a sequential gearbox is based on the principle of strictly sequential gear shifting. And since it is built on the basis of a manual transmission, then throughout the article we will periodically touch on the principles of operation of a manual transmission.

The first thing to remember is the absence of a clutch pedal for a sequential gearbox, and this is a definite plus for those who have great difficulty coping with three pedals. In fact, this gearbox has a clutch, but it is controlled by the electronic unit, specifically designed for this purpose. This unit reads the signal from sensors that determine how hard you press the gas pedal and calculate which gear should be engaged. Now this is the task not of the driver, but of the equipment.

A command is sent from the electronic unit to the gearbox, where special sensors are installed. They receive this signal and transmit a new command to the progressive unit, where information about the speed rhythm of the car is stored. The progressive block is the last element in the circuit; it is responsible for adjusting the engine operating data. It receives signals from various sensors, from the degree to which the gas pedal is pressed, from the air conditioner being turned on, etc. Based on this data, it calculates and adjusts the speed limit.

Let's dig a little deeper, consider the structural component in more detail, perhaps someone will want to repair such a gearbox with their own hands. And to do this, you definitely need to know all the nuances and principles of transmitting motion to the shaft.

The design of the sequential gearbox includes only spur gears. Their use turned out to be more rational when compared with their helical counterpart installed in a manual transmission. Spur gears produce very high efficiency, and this is due to the fact that they practically do not create friction during operation. However, they also have a drawback: they transmit less torque, so to compensate for this drawback, larger diameter gears are used.

And the last feature of the sequential gearbox is hydraulic servos, it is their presence that allows the electronic unit to make ultra-fast gear changes. Some drivers confuse servos based on a hydraulic component with automatic transmissions. And this is a very serious mistake, because structurally they are completely different: both their operating principle and output efficiency.

Advantages of sequential transmission

Let's take a look at what strengths this innovative gearbox has.

Instant switching

Indeed, this is the main distinguishing feature. This transmission is fast. Not to be fabulous, it is worth noting that the switching is about 150 ms. This time period is achieved due to the presence in the system of an electronic control unit and a hydraulic servo drive. Moreover, there is no loss of speed when switching! The sequential gearbox is a game changer in motorsport.

None of the modern modifications of mechanical or automatic transmission. Moreover, it will now be much easier to keep the car on the road surface, because there will be practically no shaking and vibration. And you won’t have to press the gas pedal all the way to “finish off” the number of revolutions before upshifting, as in an automatic transmission.

Economy

This point follows from the first; thanks to the well-thought-out design of the transmission, fuel consumption is very economical.

Steering wheel paddle shifters

This technology has been around for a long time and is very popular among racers. And in a sequential gearbox, the shift speed is even higher and the convenience is even greater.

Speed ​​mode selection

The driver can choose either automatic gear shifting and drive without thinking about anything, or manual gear shifting, which is called Sport Mode.

Disadvantages of sequential transmission

Wear

High load leads to rapid wear of this type of transmission. And the conversation now is not about the sports cars that you see on the Formula 1 racing track, but about ordinary cars. The fact is that the presence of an electronic control unit makes the gearbox very sensitive to loads, in other words, to untimely switching. Another proof of the statement “The more complex the mechanism, the higher the likelihood of it breaking.” Of course, if everything is done on time and unnecessary load is avoided, such a transmission will be durable.

Expensive service

We looked at the design of a sequential gearbox; it contains many electronic data counters and analyzer units. That's why the cost Maintenance such a transmission is very high.

Basic misconceptions

Sequential transmission = robotic gearbox

This is probably the main misconception. Yes, these two gearboxes have servos, but in the sequential gearbox they are hydraulic, and in the robotic gearbox they are electric. And this is a technologically different implementation.

Sequential transmission is an automatic transmission

Most drivers make this conclusion based on the fact that almost all modern cars for regular use (not sports cars), which are equipped with such a transmission, work only with an automatic transmission. This is a deep misconception, firstly, there are models where you can choose automatic shifting or manual shifting while driving. Secondly, remember Formula 1 racing and everything will immediately fall into place.

Conclusion

Today, the sequential gearbox is becoming more and more popular and is installed on new models of cars and even motorcycles. Over time, this technology is improved and brought to perfection. If we compare the first such transmissions that went into mass production at BMW cars in 1996, and modern analogues - the difference will be colossal! And if a sequential transmission, which is also a cam transmission, is installed on a car, then you get twice as many benefits. Most often, this technological solution is used on sports cars.

Constant experiments to improve the manual transmission led to the invention various types transmissions. All developments were aimed at simplifying the driver’s actions while driving.

One of the important steps in modernizing the manual transmission was the invention of the automatic gearbox. Car manufacturers have focused on introducing these particular boxes. Currently, most cars are equipped with an automatic transmission. A driver, driving a car with an automatic transmission installed, does not think about changing gears to up or down. Automation carries out this process without human intervention.

But the designer was not forgotten about mechanical box. Various experiments on modernization and improvement were constantly carried out. After numerous experiments, the problem of creating a sequential gearbox was solved. The main difference from a conventional manual transmission is the gear shift sequence.

Sequential - this word is not familiar to many Russian drivers and it is quite difficult for a Russian to pronounce it. The reason for this is the English origin of the word. Translated from English it means “sequential”. A sequential gearbox is most often an automated gearbox. It can change gears sequentially, for example, from first to second and higher, and also in reverse order.

Principle of operation

This box was developed on the basis of a mechanical box. The main difference is the use of spur gears. Therefore, the presence of the clutch pedal has lost its necessity. The design includes an electronic control unit that performs this function. Switching speeds using a hydraulic mechanism. The switching itself occurs in a time interval of up to 150 milliseconds.

This circumstance is especially true for sports cars. Cars participating in various races, including Formula 1, are equipped with sequential gearboxes. When developing racing cars, the designers came to the conclusion that this gearbox is the most convenient for pilots. In case of significant vibrations and overloads, it will be easier for pilots to get into gear using just such a gearbox.

It is worth noting that sequential gearboxes have been present on ordinary cars for several years. On cars with an automatic transmission there is a sequential mechanism, which is called “manual” mode among drivers.

Peculiarities

The shift lever on cars with a sequential gearbox is located on the steering wheel in the form of a button marked S. Such cars provide both automatic and manual gear shifting. The sequential gearbox can operate in three modes:

• Standard mechanical.
• Mechanical sports.
• With automatic switching without driver intervention.

pros

A sequential gearbox, like any other mechanism, has its advantages and disadvantages. Among the advantages is the absence of a clutch pedal, which is very pleasing to novice drivers. The next advantage can be considered the speed of gear shifting. And, of course, a definite plus is cost-effectiveness. Due to the speed of switching, there is a significant reduction in fuel consumption.

Another plus is the ability to choose between an automatic or manual transmission. Some cars have “paddle shifters” located under the steering wheel, thanks to which the driver can change gear without taking his hands off the steering wheel.

Minuses

But this box also has its drawbacks. The hydraulic mechanism is subject to significant wear due to heavy load during operation. On cars participating in racing, mechanics repair the gearbox after the second race. IN production cars a much greater strength resource is built into it.

During use, they do not experience as much stress as sports cars. Therefore, when correct operation The service life of a sequential gearbox is no less than that of a manual or automatic gearbox. But if you use such a box without thinking about the consequences, then premature exit you are guaranteed to fail. Will it be hydraulic drive clutch, another component or unit, this is not so important. The main thing to remember is that repairing a sequential box is very expensive.

Currently, the sequential gearbox is attracting more and more car owners. It is installed on many new car models and even motorcycles. The technologies of this transmission are being improved and brought to ideals. The time is not far off when not only sports cars, which are equipped with a sequential gearbox, and even a cam gearbox, will enjoy a convenient transmission, but many car owners will be able to appreciate the advantage of sequential gear shifting.

Sequential gearbox(from English sequence - sequence, English. sequential manual gearbox ) - a gearbox that allows only sequential shifting. The principle of operation of the gear shift mechanism differs from the classic type gearbox. Sequential switching is convenient in cases where the control is operated with the foot (for example, on a motorcycle), when quick switching is required (for example, on sports car) or in the presence of a large number of gears, the selection of which is inconvenient using the traditional method of moving the lever (on tractors, trucks). Typically, switching is accomplished by moving the control away from the neutral position.

The switching mechanism can be either direct acting, for example on motorcycles, or with a servo drive (automated or non-automated).

The following gearbox control scheme is adopted on motorcycles:

• moving the lever up - switching to up gear;
• moving the lever down - switching to downward gear;
• Neutral (transmission disengagement) is usually located between first and second gears, and is not activated by the full stroke of the lever.

On cars, it is usually controlled by a lever that simultaneously serves as a mode selector and gear shift, but can be controlled by buttons located on the steering wheel. On tractors, the control of a sequential gearbox can be duplicated: a lever and a pedal.

The sequential mode is designated by the Latin letter "S".

The sequential gearbox is based on a conventional manual transmission, only slightly modernized and “complicated”. The gear shifting process occurs using hydraulics, this is the main difference between this gearbox and a robotic one. Also, switching occurs sequentially, that is, without skipping speed.

The use of hydraulics makes it possible to reduce the gear shift time of a sequential gearbox to 150 milliseconds. It also allows you to protect the box from “rough” handling.

The gear shift levers are usually located on the steering wheel. There is both automatic and manual switching. Typically there are three modes:

1) standard mechanical;

2) sports mechanical;

3) automatic gear shifting by a sequential gearbox without driver intervention.

For example in models M 3 stamps BMW Gear shift speed has dropped to 80 milliseconds. This was achieved through the use of aerospace technologies, technologies used in Formula 1. Also, sequential boxes have many modes that make life easier for the driver. This includes uphill mode, snow track and many others.

In conventional gearboxes, in the process of switching speeds, the drive rod is pulled up, turned, pressed, and the gear we need is “selected”. In the sequential box, pressure is created in the hydraulic unit and the hydraulic accumulator is filled. Then, through the operation of the hydraulic system, the gear shift process occurs.

For example, in sequential gearbox. You can change gears in two ways: using the steering wheel paddles, or using the gear shift lever in the center console, which allows you to instantly change from one gear to another without reducing speed or engine power or using the clutch. Launch Control uses the optimal rev range to automatically shift gears for the fastest possible acceleration. In this case, there is no need to remove your foot from the accelerator pedal. It is also permissible to move away in second gear (for example, on ice).

The sequential gearbox is based on a conventional manual gearbox. Among the most important innovations is the use of two switches located on the steering wheel, in addition to the conventional selector lever. The driver can change gears without taking his hands off the steering wheel. Gear changes are strictly sequential - not a single one can be missed. The sequential gearbox reduces the risk of inaccurate gear shifting and overloading of the gear teeth.

To compile the publication, information was used from Wikipedia, bmw.ru, autoclub36.ru and cars-area.ru.