What does 8AT mean in cars?

[LaHaven]

8AT refers to an automatic transmission with 8 forward gears. The following is an introduction to automatic transmissions: 1. AT stands for automatic transmission, also known as automatic gear. It has the advantages of easy operation, comfortable driving, and reduced driver fatigue. 2. The automatic transmission consists of a hydraulic torque converter, planetary gear transmission, and control mechanism, which can automatically change speed and torque according to road conditions. The following is the working principle of an automatic transmission: The pump wheel and turbine form a working pair, similar to two fans placed opposite each other. The wind blown by one fan will rotate the blades of the other fan, with the wind acting as the medium for kinetic energy transfer. If liquid is used instead of air as the medium for kinetic energy transfer, the pump wheel will drive the turbine to rotate through the liquid. By adding a guide wheel between the pump wheel and turbine, a speed difference between the pump wheel and turbine can be achieved through reaction force, enabling speed and torque changes.