Principle of bus door switch

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 soon as the driver presses the switch, the solenoid valve is energized, the gas path is connected, the door pump sucks/exhausts, and the door is opened/closed. 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.