What is the principle of bus door?

The bus door mainly generates electricity according to the atmospheric pressure to open or close the door.

Working principle of bus automatic door, compressed air generated by air pump acts on cylinder and hinge mechanism through electromagnetic reversing valve, and the door opens.

Specifically; Buses are generally pneumatic folding doors. As long as the driver presses the switch, the solenoid valve is energized, the air path is connected, and the air pump sucks and exhausts, the door will open and close. Some can use the remote controller to control the power on and off of the solenoid valve, thus controlling the opening and closing of the door.