Why can the rapidly growing AMT gearbox replace the MT as the mainstream?

Not long ago, WABCO, an internationally renowned vehicle parts manufacturer, held an extraordinary shareholders' meeting in New York and approved the agreement for the acquisition of the company by ZF Friedrichshafen AG of Germany. After the completion of the acquisition, ZF CEO Wolfhanningsch Eide said in an interview that ZF will combine the technological advantages of both parties and continue to make efforts in the field of commercial vehicle automation.

In the field of commercial vehicles, when it comes to autonomous driving, most of the words that come to people's minds are full of science and technology, such as intelligent control, active identification, radar monitoring, and high-precision maps. But in fact, among all the key technologies involved in the automatic operation of trucks, the application of automatic shift technology, that is, AMT gearbox, may be the most mature one at present.

The AMT gearbox for heavy trucks is the fastest development speed in the past ten years. At this year's Shanghai International Auto Show, the high-end models displayed at various commercial vehicle booths, including the Auman EST-A 2019 China VI Changxing Edition, Howo T7H China VI Tractor, Qingling Jujia 2020 Edition, etc., all use AMT transmissions.

All kinds of signs show that after nearly two years of cultivation of AMT gearboxes by domestic heavy-duty tractors, its development status has been basically mature. In 2019, AMT gearboxes entered the introduction period, and some domestic high-end AMT gearbox models have achieved a certain market foundation.

However, at the same time, it should be made clear that the increasingly mature AMT technology of heavy-duty tractors does not mean that it has solved all the pain points in use, and there are still bottlenecks in the development status of AMT heavy trucks. It is foreseeable that for a long time to come, manual transmission will still be an important choice for heavy-duty tractors.

AMT automatic transmissions came to China around 2000 with imported heavy trucks, and the independent research and development of AMT by Chinese commercial vehicle companies began in the following years. Sinotruk and Jiefang are the first companies to participate, and the "expert" fast of commercial vehicle parts is playing an increasingly strong influence in this field.

Compared with MT, AMT has more prominent advantages in China.

This is because it has benefits that the previous generation did not have.

Because of its advanced technology, it is the development trend.

Because the process is advanced, it has better advantages.

Advanced technology is the development trend.

Because the AMT's gearbox accelerates faster than the MT's gearbox.

That's the trend, the big trend of the future.

Just because there is an extra letter a

Advantages: high transmission efficiency, low manufacturing cost, simple structure, low fuel consumption; Disadvantages: Shift impact and poor comfort.

AMT is an improved version of the traditional manual gear transmission, which has both the automatic characteristics of an AT gearbox and the advantages of MT, because it is based on the improved MT and has a lower manufacturing cost.

However, the biggest disadvantage of the AMT transmission is that when changing gears, the power transmission will be interrupted, and the frustration is very strong, and the comfort of the occupants in the car is difficult to guarantee.

It's all gearboxes, what are the advantages of AT CVT DCT AMT MT? Be sure to find out when buying a car.

2. The transmission efficiency is higher than that of the automatic transmission, and it is more fuel-efficient than the hydraulic automatic transmission under the same displacement engine conditions.

3. The structure is simpler, the maintenance is cheaper than the automatic transmission, and the durability is better than the automatic transmission.

4. The process is relatively mature and the manufacturing cost is low.

Second, the shortcomings. 1. When shifting gears, it is necessary to control the clutch, shift handle and throttle at the same time, which will make the driver's operation burden large, especially for novices, which is easy to cause the driver to be nervous and affect driving safety.

2. Those who are not skilled in controlling the clutch often turn off on the road, especially if the uphill operation is improper, there is a chance that the engine and gearbox will be damaged.

You can also take a look at the car's performance first.

The type and power of the engine and transmission of the car are different. You can learn about their relationship first, I hope it can help you.

The engine powers the car and belongs to the heart of the car. The bumper gearbox transmits power to the wheels and is the link between the engine and the wheels.

Engine: The automobile engine is a device that provides power to the car, and belongs to the heart of the car. According to the different fuels, the car engine can be divided into diesel engine, gasoline engine and electric motor.

According to the different working methods of the air intake system, it can be divided into naturally aspirated engines, turbocharged engines and supercharged engines. According to the different cylinder arrangement methods, it can be divided into in-line engine, V-type engine, W-type engine and horizontally opposed engine. According to the number of cylinders, it can be divided into single-cylinder engine and multi-cylinder engine.

The difference between AMT gearbox and pure AT gearbox is: AT is the general term for all automatic transmissions, while AMT is a mechanical automatic transmission, which is an automatic transmission system with microcomputer control on the basis of manual transmission.

1) The cars sold on the market are equipped with manual transmissions (MT), automatic transmissions (AT), and continuously variable transmissions (CVT).

b) The main features of AMT are:

AMT is modified on the basis of the original mechanical transmission (manual wave), mainly changing the manual shift control part;

That is, under the condition that the overall transmission structure remains unchanged, the automation of gear shift is realized by installing an automatic control system controlled by a microcomputer, therefore.

AMT is actually a robotic system that operates the clutch and selects the gears;

Because AMT can be transformed on the basis of the manual wave of the current production, the production inheritance is good, and the responsibility of input is also low, which is easy to be accepted by the production plant;

The core technology of AMT is microcomputer control, and electronic technology and quality will directly determine the performance and operation quality of AMT.

AMT (Automatic Mechanical Transmission) is a combination of AT (Automatic Transmission) and MT (Manual Transmission), and cars equipped with AMT no longer need a clutch pedal, and the driver can simply start and drive the car by simply pressing the accelerator pedal. Structurally, it can be understood as a manual gearbox, with a clutch and shift fork operated by a hydraulic mechanism to achieve automatic shifting.

Advantages: simple structure, convenient operation, fast gear shifting speed; Fuel-efficient, durable, high transmission efficiency; And the cost is lower, and the defeat pants are lower. Since the AMT gearbox is still an evolution of the MT gearbox in terms of structure, it also inherits the characteristics of the MT gearbox, such as strong durability and easy maintenance.

Disadvantages: mainly due to the large impact of shifting, serious frustration, and poor comfort; The penetration rate in China is far less than that of developed countries in Europe and the United States, and AMT is basically only used in some A0 class models.

The AMT gearbox is a MT gearbox with an "electronically controlled clutch", since it is a MT gearbox, of course, you have to add MT gearbox oil.

AMT gearbox is also called "semi-automatic" gearbox, but it has nothing to do with the "AT" gearbox, but it is almost the same as the MT gearbox, which is nothing more than the "foot pedal" clutch becomes the "electromechanical control" clutch, to put it bluntly, you don't have to step on the clutch yourself, electromechanical helps you step on it, so in essence, MT should have AMT, AT should have the same AMT, as shown in the figure below, the inside of the AMT gearbox is almost the same as the inside of the MT gearbox.

Therefore, you can add MT (manual) transmission oil, the role of "manual transmission oil" is "lubrication", so there are requirements for the viscosity and thermal attenuation of the "transmission" oil, and the viscosity is high enough to completely wrap the parts, and can maintain enough oil film thickness to better protect the parts from damage.

Both are automatic transmissions, and comfort is based on the type of vehicle and the performance of each vehicle. But there are some differences in technology and principle, AMT and AT are two different levels of cars equipped with transmissions, the reason why you say that AT gearboxes can not be popularized is very simple, not all cars and price cars can also be automatic transmissions. For today's automatic transmissions, there are no fatal defects as long as they are not overloaded or if the lubricating oil reserve and marking requirements are met.

You can rest assured of that.

The AMT is fully automatic, with only the brakes and accelerators pressed.

The difference is the addition of a manual gear.

There is no difference in comfort.

There is not much difference, the main thing is that AMT adds a shift solenoid valve to the AT, and that's it.