Bus door opening and closing control schematic

? Car engine equipped with an air compressor, when the engine works, the air compressor also works, the air compressor outlet linked to the gas tank, the gas tank has a safety valve, when the tank pressure exceeds a certain pressure, the safety valve automatically open, so under normal circumstances there is a certain amount of gas in the tank and a certain pressure to open and close the door from the gas tank air source.

? Public **** car from the point of view of the design and technical characteristics, and other large and medium-sized bus models (such as long-distance buses, tourist buses, group buses, etc.) is different, this vehicle is equipped with passenger seating and for passengers to stand and walk around the channel, the requirements of a large area of standing, the compartment channels and entrances and exits are wide, more than two doors, the pedal is low. If it is a suburban public **** car, is mainly used for passenger transportation between cities and towns in the middle distance, the seat is more urban public **** car, there should be a luggage compartment or luggage rack.