What are the different types of car transmissions?

Transmissions are classified as follows: manual transmission, automatic manual transmission, CVT continuously variable transmission, CVT gearbox with gear, dual-clutch transmission, AMT transmission.

What gearboxes are used in these cars.

At present, there are four main types of automatic transmissions on the market:

1. AT gearbox, scientific name is hydraulic automatic transmission, this is a kind of automatic transmission that we have the most contact, from the early contact with the 4AT gearbox, to now some cars are equipped with 9AT gearbox, the advantages of AT gearbox are obvious, the power is "more direct", the shortcomings are also more prominent, the frustration when accelerating, and the fuel consumption is relatively high.

2. CVT gearbox, scientific name mechanical stepless automatic transmission, is mainly represented by Japanese cars, and most models such as Honda and Nissan use CVT gearbox. The characteristics of the CVT gearbox are obvious, because the gear ratio is not an intermittent point, but a series of continuous values, so the ride performance is very good, and the fuel economy is also more prominent, but the shortcomings are also relatively obvious, that is, the instantaneous output of power lacks a burst point, which is relatively gentle.

3. AMT gearbox, the abbreviation of electronically controlled mechanical automatic gearbox, AMT gearbox is a compromise product of MT gearbox and AT gearbox, the advantage is that the production cost is relatively low, and the operation is more convenient than that of manual gearbox. However, the shortcomings of AMT gearbox are more prominent, and it is easy to have a strong sense of frustration if the operation is not good, which greatly affects the comfort, and there are relatively few models equipped with AMT gearbox on the market now.

4. Dual-clutch transmission is referred to as DCT, dual-clutch as the name suggests is the use of two sets of clutches, through the alternating work of the two sets of clutches, to achieve the effect of backlash-free shifting, and divided into dry dual-clutch, and wet dual-clutch, dual-clutch transmission, fast shift speed, small power loss during shifting, fuel economy performance is also good, the shortcomings of dual-clutch gearbox are more obvious, and the stability of quality is a major disadvantage of dual-clutch.

1. Manual transmission, also known as MT, is the earliest and most widely used, since the birth of the car is a manual transmission, has been used until now, it is enough to show that it has good reliability and stability. Its structure is simple, and the shift lever controls the fork inside to shift gears, allowing several sets of gears of different sizes to mesh together to achieve a shift, just like a gearing bike.

2. AT gearbox, with the development of technology, AT gearbox has been produced, which does not need people to control the shift, only needs to control forward or backward, and the operation is simple. It is composed of torque converter, clutch and brake, with a complex structure, which needs to be supported by advanced technology and intelligent shift procedures, mainly relying on the hydraulic transmission power of transmission oil, and the shift depends on the planetary gear set.

3. CVT gearbox, also known as continuously variable gear. The driving wheel and the driven wheel are both conical structure, which are connected by steel belts. It does not have a fixed gear ratio, the gear ratio is continuously variable, the gear shifts are smooth, and the fuel consumption is very low.

Ideal for domestic use, it is not suitable for high torque output due to the use of steel belt drive.

4. Dual-clutch gearbox, which is a combination of two manual gearboxes and a set of automatic shift mechanism is added, which is essentially a manual gearbox. It has the advantages of a manual transmission. The transmission efficiency is high, fuel saving, fast gear shifting, and it also has the advantages of automatic transmission, which is simple to operate.

At present, the biggest disadvantage is that the gearbox is easy to overheat, and it is more serious when driving in congested roads, and the reliability is not very high.

The function of the car gearbox.

1. Change the transmission ratio, expand the range of torque and speed of the driving wheel, so as to adapt to the often changing driving conditions, and at the same time make the engine work under favorable (higher power and lower fuel consumption);

2. Under the condition that the direction of rotation of the engine remains unchanged, the car can drive backwards;

3. Use neutral gear to interrupt power transmission, so that the engine can start and idle, and facilitate the transmission to shift gears or carry out power output.

In terms of control means, there are manual transmissions, automatic transmissions, and manual automatic transmissions (manual intervention control functions are added on the basis of automatic transmissions). Manual transmissions are currently dominated by 5th or 6th gear. The main automatic transmission is a 6-speed.

The automatic manual transmission is also the mainstream 6-speed, and there is also a DSG dual-clutch transmission, which has very good performance and good fuel economy. As well as CVT, the gear shift is very smooth, in fact, there is no gear at all.

The gearbox can be divided into two-axle and three-axle type, and can also be divided into manual and automatic MT, AT, AMT, DCT or DSG, CVT, etc., among which Volkswagen focuses on DSG, Japan will carry forward CVT, AMT is used the least, and it is generally used in relatively small economic cars, while MT and AT are the most common.

The gearboxes of automobiles have CVT, MT, AT, and these types, all of which have their own advantages, and the gearboxes selected according to different cars are also very different.

1) According to the transmission ratio, it can be divided into continuously variable transmission and continuously variable transmission (CVT).

2) According to the operation mode, it can be divided into manual transmission (MT) and automatic transmission (AT, including manual automatic transmission, continuously variable transmission, dual-clutch transmission, automatic clutch transmission).

3) According to the clutch control form, it can be divided into automatic clutch transmission (AMT), dual clutch transmission (DSG DCT), etc.

Common car transmissions are: hydraulic automatic transmission (AT), mechanical continuously variable automatic transmission (CVT), electronically controlled mechanical automatic transmission (AMT), dual clutch transmission (DSG).

1. AT is composed of hydraulic torque converter, planetary gear and hydraulic control system, and realizes variable speed torque through hydraulic transmission and gear combination. Among them, the torque converter is the most important component, which is composed of a pump wheel, a turbine and a guide wheel, and has the function of transmitting torque and clutch.

2. Compared with AT, CVT eliminates the need for complex and cumbersome gear combination transmission transmission, but the transmission adopts two sets of pulleys. The speed change is achieved by changing the contact radius of the drive wheel with the driven wheel belt. Due to the elimination of the gear drive, the gear ratio can be changed at will, the speed is more stable, and there is no sudden gear jumping.

3. AMT is a step-dependent automatic transmission like a hydraulic automatic transmission (AT). On the basis of the ordinary manual transmission, a microcomputer-controlled electric device is added, which replaces the manual operation of clutch disengagement, engagement, transmission selection and shift action, and realizes automatic gear shifting.

4. There is a clear difference between the DSG gearbox and the traditional automatic gearbox, and the DSG does not use a hydraulic torque converter from the beginning. This transmission is not produced on the basis of a conventional automatic transmission concept. The engineers who designed the DSG embarked on an innovative new technology path that skillfully combined the flexibility of a manual transmission with the convenience of a traditional automatic transmission.

Why is there no manual gearbox!

Transmissions are classified as follows:

1. Manual gearbox.

2. Hand self-integrationAutomatic transmission

3. CVT continuously variable gearbox CVT beltGearsof the gearbox.

Dual-clutch transmission, AMT and sequential gearbox.

For example, as you can see on the parameter configuration page, the parameter "6-speed manual automatic integration" refers to the fact that this model is an ordinary automatic transmission.

Gearbox with manual control of the gears with 6 gears. If you see "7-speed CVT", you're referring to the transmission structure being a CVT structure, but with 7 analog gears.

Function. In the driving of the car, in order to adapt to different working conditions, the driving force and the speed of the car need to change in a certain range, and the torque and speed change range of the existing engine cannot reach this requirement, so the gearbox is arranged.

Its functions are as follows:

1) Change the transmission ratio between the engine and the wheels.

Make the engine work under the best working conditions, expand the torque and speed transmitted by the engine to the driving wheels, and get different speeds;

2) enable the car to drive backwards;

3) Set the neutral.

Hello! Glad for your question.

There are many types of gearboxes, such as AMT, AT, CVT, and DCT

1. AMT is also called electronically controlled mechanical automatic gearbox, its mechanical structure is still a manual gearbox, which is also the meshing of several sets of gears, and there is also a clutch. On this basis, it is equipped with a set of electronically controlled shift system, which automatically controls the engagement and disconnection of the clutch and automatically selects the gear. In this way, it has the same transmission efficiency as a manual gearbox, and there is no need for the driver to change gears.

However, in actual use, due to the reasons of electronic control technology and the characteristics of manual transmission, there will be many problems. The biggest problem is that the gear changes are not smooth, the frustration is great, and the driving is uncomfortable, so there are very few vehicles using AMT. Because of its low cost, it is generally used in relatively cheap family cars, so that the manual transmission becomes an automatic transmission.

2. AT is a common hydraulic automatic gearbox, which is composed of several components such as hydraulic torque converter, planetary gear set, gearbox computer, solenoid valve, brake belt, clutch plate and so on. The transmission of power depends on the transmission oil, which relies on the oil pressure to shift gears and transmit power. There are 4AT, 6AT, 9AT, etc., the number represents the number of gears, 4 means that this gearbox only has 4 forward gears, and 9 means that this gearbox has 9 forward gears.

AT gearbox has a history of several years, is widely used, the technology is relatively mature, and today's shift smoothness can also be, so many cars use AT gearbox.

3. CVT is also called continuously variable gearbox, the driving wheel and the driven wheel are conical structure, connected by steel belt, and there is no fixed gear, it can also be said that there are countless gears, which can be regarded as the smoothest gearbox. Nowadays, many CVT cars also say that they have several gears, which are actually simulated, so that the driver can feel that the vehicle is changing gears and improve the driving pleasure. Its main advantages are smooth shifting and low fuel consumption, but due to the structural characteristics of the gearbox, it is not suitable for frequent high torque output, fierce driving, pulling heavy objects, running tracks, etc.

4. DCT is also called dual-clutch gearbox, which is also an improvement of manual gearbox, which is also the meshing and clutch of gears, plus a set of electronically controlled shift system. However, it has two clutches, and when it comes to shifting gears, one clutch gradually exits and the other clutch gradually engages, so that the power output is uninterrupted and smoother. The electronic control system is also more advanced and smarter, and can probably read the driver's intentions and the driving conditions at that time.

However, there will still be a setback at low speeds, especially when the deceleration is about to stop, the setbacks are more serious, and the gearbox is also prone to overheating when driving in traffic jams. The overall technical maturity is average, the transmission efficiency is high, and fuel saving is its biggest advantage.

There are four most common types of automotive transmissions:

1. AT gearbox, scientific name hydraulic automatic gearbox;

2. CVT gearbox, scientific name mechanical stepless automatic gearbox;

3. AMT gearbox is the abbreviation of electronically controlled mechanical automatic gearbox;

4. Dual-clutch transmission, referred to as DCT, as the name suggests, uses two sets of clutches.

Manual is MT. And also. Hand automata is AMT. And the automatic is AT. There is also a stepless variable is CVT. There is also a dual-clutch which is the DS G.

Types of automotive transmissions: manual transmissions, automatic manual transmissions, CVT continuously variable transmissions, CVT gearboxes with gears, dual-clutch transmissions, AMT and sequential transmissions.

Types of gearboxes: manual transmission, automatic manual transmission, CVT continuously variable transmission, CVT gearbox with gear, dual-clutch transmission, AMT and sequential transmission.

There are four types of automatic transmissions:

1. The hydraulic automatic transmission realizes automatic transmission through the combination of hydraulic transmission and planetary gears, which is generally composed of hydraulic torque converter, planetary gear mechanism, shift actuator, shift control system, shift control mechanism and other devices;

2. The characteristic of mechanical continuously variable automatic transmission is that the gear ratio is not an intermittent point, but a series of continuous values, so as to better coordinate the external driving conditions of the vehicle and the engine load, and give full play to the potential of the engine;

3. The electronically controlled mechanical automatic transmission is improved on the basis of the traditional manual gear transmission, which is a mechatronic and hydraulic integrated automatic transmission that combines the advantages of AT (automatic) and MT (manual);

4. The dual-clutch automatic transmission adopts two sets of clutches, and the two sets of clutches work alternately to achieve the effect of backlash-free shifting.

Common automotive transmissions are as follows:

Manual Transmission:

Models equipped with manual transmissions require the driver to use their hands and feet to switch gears while driving, but manual transmissions are not a hallmark of lower-spec models, and some see this direct communication with machinery as a pleasure. Manual transmissions are divided into gears, and our common ones are 5-speed manual transmissions and 6-speed manual transmissions.

2.Mechanical Transmission (AMT):

From the point of view of operation, the models equipped with AMT transmission can be classified as automatic transmission models, but in terms of structure, the AMT transmission adopts more manual transmission structure, but it controls the clutch through a set of servo mechanism, thereby liberating the driver's left foot. Today, most AMT transmissions use electro-hydraulic actuators to control the clutch and shift forks.

3.Hydraulic Automatic Transmission (AT):

This type of gearbox is composed of a hydraulic torque converter, a planetary gear mechanism, a hydraulic control system, an electronic control system, etc. At present, the vast majority of automatic transmission models on the market are equipped with this type of automatic transmission, and the number of gears is still one of the criteria to measure the technical content. The original 4-speed automatic transmission is no longer the mainstream, at present, the average family car is mostly 5 or 6 gears, luxury cars are favored by more gears of automatic transmission, Range Rover Evoque, Mercedes-Benz C-Class and other models are also equipped with 9-speed automatic transmission.

Continuously variable gearbox:

In terms of driving operation, cars equipped with CVT transmissions also use a gear lever to select parking, reversing, neutral, and forward or manual gears, as early as 1886, the CVT continuously variable transmission was installed on a Mercedes-Benz car. However, due to the immaturity of various technologies at that time, the gearbox of this structure was not taken seriously at that time. With the continuous advancement of technology, CVT technology has also matured, and its advantages in transmission smoothness and fuel economy have been highlighted.

5.Dual-clutch automatic transmission:

In terms of operation mode, dual-clutch automatic transmission still belongs to the category of automatic transmission, but it is different from the hydraulic automatic transmission and CVT continuously variable transmission introduced in the previous article in terms of internal structure and gear shifting mode. It is somewhat similar to the AMT automatic transmission, which relies on the gears of different gear ratios between the switching shafts to change the gear ratio, and the device responsible for cutting off or engaging the power is also realized by the clutch located at the input end of the transmission, but the more logical dual-clutch automatic transmission is better than the AMT transmission in terms of shift speed and shift quality.