What does 9at gearbox mean?

Pacific Auto Network refers to a 9-speed automatic gearbox with only 9 forward gears and 1 reverse gears. Its main function is to achieve high fuel economy, that is, to save fuel and accelerate quickly. As the core component of the automobile, the gearbox has a great relationship with the performance, safety and stability of the automobile.

The biggest advantage of 9AT is fuel saving and fast acceleration.

The core structure of 9AT gearbox is four groups of planetary gears and six shift elements, which is one more shift element than 8HP. In the case of multiple gears, the gear gap between gears is reduced and the reduction ratio range is wide. Fuel consumption can be reduced at high speed and strong acceleration can be obtained at low speed.

Disadvantages of 9AT gearbox:

Due to the increase of gears, the internal components have also increased a lot, which has higher requirements for manufacturing and research and development, and the corresponding costs will be higher. Due to the complexity of internal components, there are many problems that will cause failures. Compressing the volume of components to adapt to the size of the shell leads to less bearable torque.

(Photo/Text/Photo: Pacific Auto Network Li Caiying)