1. Automotive gearbox: It is divided into manual and automatic. The manual gearbox is mainly composed of gears and shafts, which generates variable speed and torque through different gear combinations. The automatic gearbox AT is composed of hydraulic torque converter, planetary gear and hydraulic control system, which achieves variable speed by means of hydraulic transmission and gear combination. Moment.

2. The function of automobile transmission:

1. Changing the transmission ratio and expanding the range of the torque and speed of the driving wheel to adapt to the constantly changing driving conditions, while enabling the engine to work under the conditions of high power and low fuel consumption.

2. When the direction of engine rotation is unchanged, the car can go backwards.

3. Use neutral gear to interrupt power transmission, so that the engine can start, change speed, and facilitate transmission shift or power output.

4. The transmission is made up of a transmission mechanism and a transmission mechanism.