Demystifying the story behind the AT (AT) AT gearbox
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Fast (AT) AT gearbox family
The Fast 6 (AT) AT gearbox 6 gear can reach the torque transmission range of the manual gearbox 9-speed gearbox or 12-speed gearbox. Its flagship FC6A140/180, FC6A210/250 series heavy-duty automatic transmissions can be widely used for buses, luxury buses, heavy trucks, wide body dump trucks, construction machinery, special vehicles, etc. with a torque of 750N·m to -2576N·m. A variety of models. This is because there is a hydraulic torque converter in the gearbox. When working in the low gear, the torque converter is in torque-changing mode, which can amplify the torque of the engine and make the whole vehicle under starting and climbing conditions. Achieve greater power output. Unlike ordinary MT (manual) transmissions, AT gearboxes use a planetary gear structure. The most important feature of planetary gear transmission is its small size, large carrying capacity and stable operation. This is why the transmission has high reliability and low noise when transmitting high torque.
In the design of this series of gearboxes, each part has undergone a lot of simulation calculations, so that it also has an extremely long service life when carrying out high torque transmission. In turn, the transmission achieves greater torque transmission, and Fast (Shuangte) owns the world's advanced processing and manufacturing capabilities. The gears and bearings of the AT gearbox have high processing precision and excellent quality, further enhancing product reliability. And durability.
Many people will doubt that, as an AT gearbox, will it affect the safety of the transmission when it is subjected to such a large torque?
The maximum input torque of the gearbox refers to the maximum power that it can withstand. The greater the maximum input torque, the better the truck's power performance and the greater the carrying capacity. When designing the gearbox, researchers will master the maximum torque input into the gearbox in advance, and then increase the safety factor based on this. That is to say, even under the special conditions, the maximum torque can be used in the transmission, and the safety of the transmission can still be guaranteed within a certain range. At the same time, taking into account the problem of torsional vibration that has the greatest impact on the transmission, the designer used a special component in the transmission to effectively avoid or reduce the impact of torsional vibration on the transmission. The dual measures for the transmission were: Security escort.
How AT gearboxes work with hydraulic retarders
Fast Transmission (Double) AT Transmission Now all products can be installed with hydraulic retarder. Retarders can be standard or optional. The retarder is integrated in the transmission and requires no energy storage device, which saves the layout of the chassis of the vehicle. The key core technology has reached the international advanced level and fully meets the development needs of the vehicle and the individual needs of different users.
The hydraulic retarder equipped with the Fast (AT) AT gearbox has a high unit braking torque and braking power, and the braking force does not decline. If the braking torque is compared with the same type of foreign products of the same type, the braking torque About 30% higher, and soft brake, no impact, can work for a long time, no thermal decline, compact structure, light weight, good vehicle comfort. When the reporter test-drives a vehicle loaded with a Fast (AT) AT gearbox, he specifically felt the braking force of the retarder. Obviously, the braking effect was good. In addition, the integrated hydraulic retarder on the Fast (AT) AT gearbox is a very good choice for customers, can effectively ensure the safety of driving, and do not have to buy additional hydraulic retarder Device, can save costs.
How AT gearboxes match the tastes of various brands of engines
Difficulties in tuning the public, Fast (AT) special AT gearbox also need to adjust the degree of matching with the brand of the engine, only the perfect combination between the gearbox and the engine in order to ensure the reliability of the vehicle in the process of running. Prior to the installation of the Fast (AT) AT gearbox, the customer will have full technical communication with the customer to understand certain parameters of the model, the parameters of the engine, and then apply the operating conditions. A technical agreement will be signed with the customer and all the Functional requirements, and the technologies that both parties should master, are very clear. In addition, Fast has a strong after-sales service guarantee system that can track customer usage.
In actual loading, it will be divided into two parts, one part is the connection of the mechanical part, this part is very common, the other part is the connection of the electrical part, the so-called connection of the electrical part, on the one hand, the wiring harness of the transmission and the vehicle Harness connects. On the other hand, to connect the gearbox with the electronic control system of the engine, it is necessary to fully communicate, because many times it is necessary to give the engine a command, such as the timing of torque reduction, or some torque signal of the engine, and send it to the transmission. Let the gearbox achieve some control functions. This is called communication. It refers to some electronic communication between the engine and the gearbox. This requires a lot of work. Including the later period, it will also do some software optimization after loading. This will also be accomplished by launching a lot of communication information between gearboxes. With reference to the message parameters, some software controls will be modified to optimize the entire communication system. The biggest feature of the Fast (AT) AT gearbox is that it integrates the TCU and the transmission wiring harness on the gearbox, which simplifies the work of wiring harnesses in the main engine plant and improves the reliability of the transmission electronic control system.
How to plan future for Fast (AT) AT gearbox
According to the China Truck Network Reporter, Xi'an Shuangte Intelligent Transmission Co., Ltd., a manufacturer of Fast Transmission Co., Ltd., will continue to explore newer and higher technical routes based on the development and production of 6AT products. The sales target market is mainly for buses, followed by terminal tractors and special vehicles, including some heavy truck dump trucks. With the continuous improvement of China's overall national strength and economic level, the bus market is increasingly demanding the upgrading of vehicles and their parts and components. Nearly 100% of European passenger car markets use automatic transmissions. The market share in North America is 80% and Japan is 60%. However, China’s current automatic transmissions are still small in the bus market, especially in the bus market. There is still much room for development and the future is very promising.
Fast (AT) special AT gearbox rely on Fast and Caterpillar unique technology background and strong brand influence, with strong market competitiveness. As the pioneer of domestic heavy-duty automatic transmissions, can the Fast (AT) AT gearbox bring China's commercial vehicle market into the era of an automatic transmission? let us wait and see.