Such a wisdom and difficult-of-hearted word for a simple Russian person, as sequential, formed from English Sequence, which means: a sequence. And the English name Sequential Manual Gearbox in Russian sounds like a sequented gearbox. This device on a certain class vehicle allowing only sequential speed switching from the first to elevated and vice versa, without retelling.
Traditional box
On traditional checkpoints installed on most domestic carsThe neutral position of the speed turning lever is found in the middle. In order to move from the scene, we squeeze the clutch and turn on the first gear. In the future, with a set of speed, their sequential switching is recommended.
However, nothing prevents us from starting movement immediately at the second speed, if the state of the road is normal and the engine is designed for such an action. Trying to start the engine with a served battery, we, pushing the car, can be included immediately and third, and even the fourth. Nothing prevents this. Reducing the speed for maneuver, we, pronamous, and the fourth transmission go to the second or first. Converting, you can turn on the course not the speed that for cars is far from harmless.
Automatic transmission
To simplify the car management, an automatic transmission was invented, which freed the driver from the need to choose the movement mode on one or another portion of the path. The machine itself switches, the driver, working by one foot, or adds speed, or slows down. Driving a car with automobiles requires less qualifications, and no wonder the permission to operate such a vehicle is now allocated in a separate category. 
But also work on improving mechanical transmission Not stopped. As a result, a sequential transmission appeared, which also does not provide for the presence of clutch pedal, but working on other principles. And its main feature is strictly serially switching speeds.
Principle of sequentality
Sequential gear shift can be noted, for example, on the motorcycles where they turn on the foot. The neutral position is located most often between the first and second transmission. The same mechanic is applied on tractors on large trucks. The largest proliferation of consistent inclusion received in the boxes of sports cars, where the road each millisecond and unacceptably reduced speed when switching. The use of hydraulics allows you to speed up this process even more and reduce it to a minimum.
The sequental mechanism is based on a regular manual gearbox, somewhat complicated in the modernization process. The main feature It is that with its help you can switch with reduced transmission without reducing the velocity of the vehicle, which is invariably when the traditional gearbox is operated. 
Cutting or sequental
I must say that on a number racing cars Installed cam gearbox. Although if the cam transmission is also sequential, already so very high speed Switching modes will be even higher. And it is applied already on the "Formula 1" bollies.
Unlike chickest gears on a traditional box ordinary car, in the cam gear boom and long. It relates it to a sequential box transmission. And it is this feature that allows both the other system to switch, without reducing the speed. In this case, the device of the box itself is easier - there are no synchronizers here, and instead of a plurality of small teeth on the gear and coupling end protrusions. Those the same cams that are directly engaged with a gap. 
Features
On vehicles with a sequental box, the switch lever is located on the steering wheel. Alternatively, buttons can be installed on the steering wheel. Right button marked with a letter "s". Provided both automatic and manual switching. In this case, the box can work in three modes:
- Standard mechanical.
- Mechanical sports.
- FROM automatic switching without the participation of the driver.
The advantages of this car of the future are the following points:
- In a car with a sequental gearbox, like with automatic transmission, no clutch pedal is good for beginner drivers.
- This box provides a choice between automatic and manual switching.
- High gear shifting speed, which is reflected on the engine efficiency.
The disadvantage is still low resistance to the mechanism of the box.
Presented at the end of June 2015 in Goodwood, you could pay attention to the presence of a sequential gearbox, which has long become an integral attribute of sports and supercars. Since some dockers are interested in the device and features this type PPC, I will tell you about her. Sequental gearbox It is distinguished by the possibility of only sequential switching between transmissions. In other words, the driver can only go to one transmission above either below the used, without jumping through the rest, how can this be done in the classic mechanical gearbox With the search principle of switching. I propose to get acquainted in more detail with this type of switching boxes and dispel a couple of delusions associated with sequential checkpits.
Principle of operation of sequential gearbox
As we have already found out, the transmission of this type of transmission switches only alternately, in a strictly defined sequence. And since the sequential gearbox is built on the basis of mechanical, we will make references on the principle of work precisely to the manual transmission.
FirstlyFor sequential gearbox, the absence of the clutch pedal is characterized, which will first of all please do not make drivers experienced. This greatly facilitates the control of the car, because constant dancing with the left foot on the clutch pedals, right for example, is an amateur thing. The clutch is controlled not the driver, but an electronic unit that receives a signal from sensors reading the press on the gas pedal and directly turn on the specific transmission. As they say, the case of technology. When the box receives a command from electronic blockWith the help of special sensors, a new signal about the velocity used is transmitted to the progressive unit. The progressive unit is the last instance where it is adjusted. speed mode Based on various indicators: ranging from engine speeds and ending with air conditioning.
Video demonstrating the operation of a sequential gearbox. How rapidly switch speeds!
SecondlyThe sequental gearbox uses straight gears. They issue a greater efficiency of the useful effect, if we compare with ososes from the MCPP. This is due to the fact that the chores have gears have more loss For friction. But the torque of the straightforward gears are capable of transmitting smaller, so in sequential gearboxes often use larger gears to compensate for this shortcoming.
Finally third distinctive feature Sequential transmission is the presence of hydraulic servo drives, with which switching between transmissions occurs. Currently, hydraulic servo drives are often associated with robotic gearboxBut it is not. The latter uses electrical.
About one of the options for execution of a sequental box tells Yevgeny herbalists in his video:
Advantages and disadvantages of sequential gearbox
Now that we have an idea of \u200b\u200bthe principle of operation of the transmission mentioned, let's understand what it is worth expecting from her.
Benefits:
1. High speed and convenience of switching between gears. Due to the presence of an electronic control unit and a hydraulic mechanism, time-time switching costs are reduced to 150 milliseconds, which plays a significant role in professional motor racing. More than one of the classical transmissions, both mechanical and automatic, cannot boast more shock gear. In addition, with a sequental gearbox you will not be convulsive to try to get into the right speed, rushing from all horse power On the ring, when to keep the car on the correct trajectory interferes with high load and shaking with vibration.
2. No speed loss when switching.
3. Economical flow Fuel.
The last two points are rather the consequence of the first, but we cannot but take into account this, paying for a sequential gearbox.
4. Ability to switch to stealing petals.
Yes, this technology, so loved by real riders, has opened due to the sequential switching mechanism.
By the way, the gamers also loved this mechanism. Some even themselves take to develop such boxes \u003d)
The fifth advantage could be called a choice between two modes - automatic and manual transmissions (the so-called sport mode). But this feature is characteristic of automatic gearbox. And since the sequental transmission may exist independently, we will leave this advantage of certain types of automatic gearbox.
Disadvantages:
Here we are talking not only about the loads that test the Bolides of Formula 1 on the race track, but also on the loads that the hydraulic mechanism may experience with improperly switching on civilians. No matter how simply switching transfers to sequental gearbox, it is necessary to do this in a timely manner. The aggregates of this transmission are quite sensitive and quickly wears due to the design features. After all, the harder the mechanism, the greater the likelihood of his breakdown.
2. Horificate in service. Actually, here you can also refer to constructive features Sequental gearbox, and without unnecessary comments.
Misconceptions and myths associated with sequential gearbox
1. Sequential gearbox and robotic gearbox is the same.
By all, it is not. Despite similar principle of work, in a robotic checkp. At least electrical servo drives are used to switch between transmissions. And in the sequential gearbox - hydraulic.
2. Sequental and automatic gearbox are inseparable.
Another error caused by the wide distribution of automatic gearbox in a pair with a "sport-mode". However, it is worth remembering the checkpoint used in the motor racing, and everything falls into place. Sequental gearbox can exist separately from automatic transmission.
3. The sequented mechanism is installed only on the barges and other sports cars, along with a cam box.
Undoubtedly, the duet of these two technologies gives a huge advantage on the track, but no longer one ten years old sequental gearbox is used on serial cars intended for public roads.
Application of sequential gearbox
Currently, the sequental mechanism is widely used and even managed to become a classic for some motorcycles and cars. For example, this type of transmission is characteristic of an old motorcycle. But the more popular use of this technology was famous for the SMG gearbox models installed on bMW cars Since 1996.
SMG 1 and SMG 2 for a long time were installed on the BMW 3 series.
A moment of nostalgia or as it was: 
1-Light switch indicator for increased gear; 2-Inclusion indicator and program; 
3-Control lever; 4-; 5-Motion Program Switch (in the Central Console).
Main components first generation SMG. Depicted in the picture: 
1 ECU system SMG.; 2 ECU aBS systems
; 3 Indicator included and program (in tachometer); 4 ECU indicator included and program
5 Motion Program Switch (in the Central Console); 6 Control lever position indicator (in the center console); 7 SMG six-speed gearbox with executive knot; 8 SMG gear mechanism bracket; 9 Drive pump; 10 Executive Cylinder Hydraulic Clutch; 11 Clutch; 12 Hydraulic block; 13 Tank of the main cylinder; 14 ECU of the DME system*
Now SMG is already available in the third generation and since 2005 is installed on the BMW E60 M5.
The main task of modern automotive designers is to improve the design of the usual mechanisms and systems to make their work more efficient and economical. And special interest in this aspect causes a car gearbox that does not cease to improve. In this way, camps was created, which is a simplified version of the ordinary manual box. Today we will discuss what a cam-hand gearbox, as it functions, and what is the advantages of its use.
Cutting gear - features and scope of application
A car, which was first established such a gearbox, was the "domestic" VAZ-2108. It is clear that in those days, such an innovation on the car has caused a lot of attention, since the camps has one very important advantage - it allows you to move much faster with one transmission to another, which contributes to its simplified design. In general, she remains familiar mechanical box Transmissions that were used and still used on many cars.
As for the scope of applying cam gearboxes, the question of their use is not entirely unequivocal. Such gearbox is very convenient for riders, as they allow maneuvering and move from one transmission to another without excess braking and time loss.But here is the conventional passenger cars, the cam flames are difficult to call practical.
Such gearboxes require a driver of another approach to ride and addictive to a new car. In particular, when switching gears on a cam box, it is very important to squeeze the clutch and rejuvenate each time. If this is not done, the gearbox is very quickly extended and will soon require repair, and even full replacement. Yes, and in terms of driving along the downloaded urban roads, the presence of cam gearbox does not care anyway anyway.
Design and principle of camping transmission
How is a cam gearbox arranged? If you are well familiar with the design of the usual mechanical gearbox, then the cam is its simplified version made for a racing version of cars. There are no synchronizers on cam boxes, the function of which is to facilitate the shift process.
But in practice, synchronizers significantly increase the time of this process, therefore, due to the abandonment of their use, the speed of working with the checkpoint increased. You should also not forget that synchronizers in their design are very fragile, so drivers had to change them often.
Refusing synchronizers, the designers were placed on the mechanism of the "cam" cams - protrusions, which are located on the ends of the gears and couplings, which provide them with each other.Wherein maximum amount The cams on the gear can reach only 7, due to which all these elements are included in the clutch with each other, leaving a large stock of space.
A characteristic feature of the work of the cam gearbox is a clawed, which occurs during the contact of the cams. By the way, it is on them that the entire load is transmitted, which occurs during the gear shift. Thanks to this, the gear teeth are less wearing.
It is also worth noting that the gears in such a gearbox are used straightforward, besides, they have larger sizes than those that are used in the classic version of the gearbox. The use of it is straightforwards that it became relevant for the reason that they lose less useful energy during friction, and the transmission shafts do not feel during their additional load. In addition, the booming gears are much easier to produce. What is the increased diameter of such gears associated with? This is necessary in order for these items to transmit the desired torque, since it decreases due to loss.
If speak about sports cars with campaign gearbox, then they make a longer first transmission and use closest transmission numbers. All this allows the car to carry out dynamic accelerations, the need for the usual passenger cars Dont Have. Therefore, on serial cars and standard gearbox, the first transmission on the contrary is the shortest. Fist gearboxes can have one of two switching mechanisms:
1. Search. The switching in this case is carried out in the same way as on the classic checkpoint - the driver lever "searches" each transmission.
2. Sequental, that is, consistent. Transmissions in this case are switched only sequentially one after one, for which the driver is only required to move or up, or down. This option is often used on racing cars, because it is more convenient and fast in use, although it is technically more difficult and therefore often leads to the wear of transmission elements.
As for the principle of operation of the cam gearbox directly, during the switching of each transmission, the gear fork transmits an effort on a shaft-shaped furrows. It is this shaft that scrolls every time you move the gearbox. Depending on which the groove is on the groove, either the specific transmission is turned on, or the neutral position of the PPC.
But there is another option of the gearbox, when when switching the lever, the axis with cams is rotated at a certain angle. In this case, the movement of the fork is ensured by the work of the cams. At the same time, so that another transmission does not turn on, another cam clures another plug, by moving which the gear joins the coupling.
The design of the cam lever is different. It is done long and is located as close as possible to the steering wheel. This is necessary in order to simplify the gear shift process even more. At the same time, the lever also has a blocking that allows you to prevent random activation Neutral transmission. Turns off the blocking by either a special button or a bracket. For the shift speed, the levers can also be placed at the wheel, and hydraulic transmission can be installed on the car.
Many are also interested in the question, and whether there is a cam automatic transmission, that is, a box-machine. In fact, there is only a semi-automatic gearbox with a cam principle of action. In driving a car with such a driver from the driver, only pre-deposit In the information control unit on the moment of transition from one transmission to another, and the block itself will switch the transmissions while driving. Thanks to the automation, even clutch will be turned on / off, and the gas pedal will be adjusted.
The principle of operation of the cam gearbox is also familiar with all motorcyclists, since two-wheeled vehicles have almost similar cam flames.
Important aspects of vehicle management with camps
What a cam-hand gearbox means, we have already understood, it remains only to figure out how to drive the vehicles on which it is installed. Consider using such a box on a modern car:
1. To switch the transmission to simply move the gearbox lever forward, increasing the values \u200b\u200bof the gear, or back to reduce them. At the same time, the number of the transmission that was activated will appear on the transmission display.
2. The clutch pedal is used only in order to give the start. During the ride, the clutch does not need to squeeze completely, enough incomplete.
3. When squeezing the clutch, the gas pedal must be released only on a little bit.
Important! Driving a racing car with cam gearbox is slightly different from the usual use of pedals. Racers constantly hold their right leg on the accelerator, while the left alternately enamel over the brake, then over grip.
4. The clutch pedal is generally absent on cars with sequential gearbox and hydraulic transmission. In this case, the semi-automatic gearbox is often used. So that the automation itself switches the transmission, the driver must decide which transmission he needs, push the lever up or down, and squeeze or release the gas pedal. Automatic inclusion Without moving the lever, it is assumed only for the first transmission.
Advantages and Disadvantages of camps
If you compare a cam gearbox with a classic mechanical gearbox, then its important advantage is the accelerated gear shift process. According to experts, the speed of this process grows threefold. Following this, another very important advantage is provided - during the transition from one to another transmission, the engine turns do not fall.
As a result, the overclocking of the car with a cam gearbox is characterized by very good dynamic without jerks and unwanted braking. If the engine has an extremely narrow range of work - this box is indispensable for it.
It is worth paying attention to other advantages of such a PPC:
Increased loads are not reflected on its integrity and do not lead to wear of parts;
Cutter box less weighs;
Transmits a large torque, increasing engine power.
But looking at the way a cam gearbox is arranged, it can also find several drawbacks. In particular, it is very noisy in operation, since each collision of the cams there is a characteristic knock.Also, with a large load, the cams are too early or late, which is especially relevant for racing cars. Wearing cams in turn is the cause of pollution motor oilin which erased metal particles fall. All this is also added to the high cost of such a gearbox, in connection with which it may not be allowed to afford it.
We summarize that camping gearbox is excellent option For those who love professional races and want to receive from their car the most dynamic overclocking without slowing during each transmission switching. But if the speed is not so important for you - you can stop on the usual manual transmission or automatic transmission.
Sports gearbox is a very complex mechanism. When it is assembling, it is necessary to carefully control the axial backlash, the quality of synchronizers, as well as the gear gears themselves. We offer you sports checkpoints assembled by your tasks. Gearboxes for cars VAZ ready for installation on your tuning (sports car).
When assembling sports boxes You have to use restored spare parts. This is due to the fact that the manufacturer has ceased to supply spare parts into the market in the eighth rendering. Restored spare parts are not inferior in quality new. This practice is used worldwide. (Example: Bosch)
Please note that the use of tuning components when assembling CPP Sport Increases the noise of the transmission operation as a whole. When installing the gearbox, check the adhesion and release bearing.
On vehicles VAZ 2110 setting the scenes (lever) should be entrusted with a specialized car service, because Incorrect lever connection can cause output.
Dear Clients! Incotim draw your attention to the fact that large units, such as sports gearbox, turbo whales, gearbox, turbo cylinder block and TP we collect under the order. The execution time of the order can be more than 3 business days and discussed separately.
We also want to draw your attention to the fact that all Sports PPCs have an increased level of noise.
A variety of gearboxes installed on modern carsSome car enthusiasts lead to a certain confusion, especially when you have to stop your choice on a particular type of transmission. That is why, in this article we will answer the question: "What is a sequential gearbox, principle of operation and its main differences?".
Constructive execution
The basis of the design of such a gearbox is a sequential mechanism (see photo 1), which allows you to switch the transmissions solely ascending (descending).
The sequential gear lever is able to move only forward or backward, and the transmission number is displayed on the display. A special shaft with furrows of a wave-shaped shape controls the switching forks, and this happens as follows. When the lever is a push, the shaft turns on the degree of a certain value and leads to the movement of the switching plug, and their location, and, consequently, the inclusion of one or another transmission is caused by the figure shape of the furrow.
The drive of a sequental gearbox, as a rule, use pneumatic or electrical mechanisms, and controls (buttons, switches) are located on the steering wheel or under it.
So, we considered the constructive execution of this CAT, more precisely, its main element is a sequential mechanism. Next - the principle of operation.
The principle of operation of the PPP of this type is almost similar to the principle of functioning familiar to the majority of motorists of mechanical transmission. Nevertheless, the differences exist, and we will consider them:
Use in the design of the box of sprinkle gears (instead of osostic in mechanics).
The presence of an electronic control unit that performs the function of the missing clutch pedal.
Using switching mechanism hydraulic type To switch gear, which significantly reduces the time of this operation (up to 150 milliseconds).
It is the last feature of sequential gearboxes that predetermined the scope of these mechanisms. They are equipped racing cars - Participants in the Competitions of the Class "Formula 1" and her like. The main reason that determined such an area of \u200b\u200buse of sequential gearbox, has become their ability to minimize the time of inclusion necessary transmission In the mode of severe vibration concomitant high speeds. However, some automakers successfully use similar mechanisms to equip ordinary cars.
Of course, sequential gearboxes, the principle of operation we considered above, have not only certain advantages, but also by some disadvantages.
Pros and cons of sevental gearbox
The functioning of any mechanism under load predetermines the presence of some (and not only positive) operational features. The indisputable advantages of sequental boxes include:
Efficiency provided with minimal switching time.
Easy control of the car (especially for newcomers), due to the lack of clutch pedals.
Ability to select gear mode: automatic or mechanical.
The presence of "stealing petals", allowing to switch, without breaking away from the control of the car (leaving your hands on the steering wheel).
Minuses of the PPC of this type, due to the features constructive execution, experts believe:
Low degree of operational reliability of the hydraulic mechanism caused by the instability of the unit to wear.
High cost of repair and restoration work.
