Everyone is automatic. Why is this bold?

National six emissions, intelligent upgrade and automatic transmission (AMT) are definitely the most critical configurations of trucks in 2020. Looking at the domestic enterprises capable of R&D, debugging and mass production of heavy automatic transmissions, I counted them in one hand. Heavy Duty Truck, Jiefang, Dongfeng, Futian Ou Man and Kuai, which automatic transmission is better? What are the advantages and disadvantages of each family?

Webeco technical blessing? The research on China Heavy Duty Truck and Fast has begun to take shape for many years.

Speaking of AMT, we can't avoid it. China Heavy Duty Truck Co., Ltd. is one of the earliest heavy commercial vehicle enterprises in China. It has been committed to the promotion of AMT for so many years and can be said to be the pioneer of AMT in China. Like FAST, China Heavy Duty Truck cooperated with Webeco to develop the execution control mechanism of AMT, which is also known as TCU.

Let's talk about heavy duty truck first. AMT of heavy trucks is based on the previous manual gearbox with an automatic actuator, which is often called gearbox cover. Then the TCU controls the clutch and actuator to complete gear selection and gear shifting. No matter gear selection or gear shifting, AMT of heavy trucks adopts pneumatic control, which has the advantages of simplicity and reliability.

Although there are many years of market experience, large-scale assembly has not been formed so far, and heavy-duty AMT seems to be a bit inflexible. Some users reported that the gearbox didn't know what gear to choose, and the gearbox was unmoved when it needed to be downshifted when climbing, and the car stopped directly on the half slope. From 20 19, China Heavy Duty Truck has optimized the TCU and added a gyroscope, which can better let the vehicle feel the slope and help start and select gears.

In addition, there are user reactions. The matching between AMT and the whole vehicle is not very good, which is caused by poor communication between TCU and the whole vehicle. Therefore, China Heavy Duty Truck's current AMT can only be regarded as the leader of the second echelon in China. And may be limited by technology. At present, the main AMT of heavy trucks is 16. Users of Shandeka can choose to install ZF AMT, which also shows that Sinotruk is walking on two legs and preparing with two hands.

The fast AMT is exactly the same as the heavy truck, and the actuator of the gearbox is the same as the heavy truck. Even the gear handle is a doll head that we are familiar with. At present, the AMT installed capacity of Fast is small, mainly for Shaanxi Automobile, Xugong, Universiade and other car companies. Although Fast is a leading gearbox enterprise in China, it still lacks experience in AMT and can only wander in the second echelon.

Fast has also made a breakthrough in technology in recent two years, and developed a 12-speed AMT integrated with TCU. This design is similar to AMT, which is the mainstream of ZF at present. TCU is integrated into the gearbox cover, and full helical gear processing technology and central separation bearing unit are adopted. But again, the experience of fast AMT is still lacking, and the technology and hardware may catch up, but the soft power is still not enough for the first-tier brands in Europe and America.

Hold hands with Bosch? AMT market liberation is low.

Jiefang, as the big brother of commercial vehicles in China, naturally did not leave behind the research on AMT, similar to China Heavy Duty Truck and Fast. It also cooperates with Bosch, an excellent international electrical supplier. The shift actuating mechanism of liberating AMT is a product of Bosch, and it is a rare pure electric control, that is, the gear selection and shift structure are all executed by motor. Theoretically speaking, the execution speed of liberating AMT is faster than the pneumatic control of heavy trucks.

However, this design also brings many disadvantages, such as difficult maintenance and high cost. In addition, the small market share and low market recognition of the liberated AMT are also related to the liberation promotion strategy. Before the AMT market is mature, liberation may not start rashly and become a crab eater.

At present, there are J6, J7, JH6, Hanv and other autonomous AMT models assembled. In addition, J7 can also be equipped with ZF AMT, which also shows that the strategy of liberating and promoting AMT is also a two-legged walk, which also shows that ZF's AMT market recognition is far better than liberation.

Besides ZF, Jiefang also cooperates with Eaton. According to sources in the truck industry, Eaton's latest AMT gearbox has been loaded on Jiefang tractor. Some previously liberated models are also equipped with Eaton's AMT. As for whether the future liberation will continue to introduce Eaton's AMT technology, it is still unknown.

Join hands with Knohl? Dongfeng AMT was released in small batches.

Dongfeng commercial vehicle located in "China Automobile City" has long been laid out in AMT. Dongfeng commercial vehicles are also looking for international giant Noel for technical cooperation. Dongfeng provides gearbox hardware, and Knohl is responsible for gear shifting mechanism and software system. The early Dongfeng AMT had no sound in the market, and even just stayed in the stage of technical verification and loading test.

In recent years, Dongfeng Commercial Vehicle took the opportunity of cooperating with Volvo, an international commercial vehicle giant, to develop the latest DA 14 series AMT, which is called Dongfeng independent AMT with Volvo technology. But so far, this gearbox has not formed sales volume, and it is only put into small batches, and the quantity may not be as good as that liberated by AMT.

Master the core technology? Futian Ou Man holds hands with ZF? Lock in AMT market

Compared with previous models, Ou Man's model is simpler. Directly cooperate with ZF to establish a joint venture factory and directly use ZF's mature AMT products. At the same time, the AMT gearbox produced by the joint venture factory can also be sold to other domestic car companies, which is equivalent to mastering the core technology and locking in the AMT market.

Back to technology, Ou Man uses ZF? What are the technical advantages of AMT? First of all, ZF has been deeply involved in AMT market for many years, and it is being used at home and abroad. There are numerous AMT car companies, including China Heavy Duty Truck, Jiefang, Dongfeng and other domestic truck giants. It can be said that ZF is the absolute king of AMT market.

Secondly, strictly speaking, ZF? AMT adopts integrated TCU, and gear selection is controlled by solenoid valve and pneumatically executed. This technology can ensure the speed and improve the reliability. Meanwhile, ZF? AMT gearbox adopts modular design, which makes it more convenient to install retarder, hybrid power unit and other components, and it is also the future development direction of components.

ZF？ AMT adopts full helical gear processing technology, which has high strength, low noise and transmission efficiency as high as 99.7%. One of the secrets of AMT fuel saving. Meanwhile, ZF? AMT adopts a central separated bearing unit, which helps to control the clutch accurately, prolong the life of the clutch plate, and make the gear shift smoother when starting.

Besides, ZF? AMT also has some leading technologies, such as neutral taxiing strategy, which can appropriately increase the taxiing distance and reduce the fuel consumption of the whole vehicle downhill. There is also a shift strategy based on GPS. Simply put, the electronic map is built into the transmission TCU, and the precise positioning of the vehicle is realized through precise positioning. In this way, the gearbox can better perceive the road surface changes and accurately select the most suitable gear, such as breaking forward and grading. The advantage of this is that it can reduce fuel consumption, and if it is used in conjunction with mechanism braking, it can also improve safety performance.

Based on ZF's AMT experience for many years, Ou Man has unique conditions for equipping ZF AMT. After all, it is a family matter, so it naturally has some advantages in debugging and matching. To put it simply, the advantage of Ou Man AMT is the combination of software and hardware, and the most intuitive feeling brought to users during use is comfort, so you don't have to worry about it like other brands.

ZF？ The advantage of AMT is that it has many years of market experience, especially the actual operating data in different regions. The technology adopted by ZF is also relatively advanced in the world at present, such as integrated TCU and central separation bearing unit. For domestic trucks, Ou Man has the greatest advantage at present. Futian and ZF have a joint venture factory equipped with ZF? Ou Man price of AMT has some price advantages over other brands. If ZF? AMT is no good, why do you choose so many high-end heavy trucks? You taste it, you taste it!

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.