Multi-Manual Emergency Escaping System of Air Control Bus Door Based on Driver and Passenger Manipulation

For controlling emergency escaping by a bus driver in the case of air control door cannot be opened normally, the paper presented a multi-manual emergency escaping system of pneumatic bus door. Bus driver and passenger can control doors expediently. The pneumatic circuit of the system and its overall arrangement is discussed. A manual control device with special valve core structure is designed. The working performance of the manual shift directional valve is analyzed. The results indicate that driver and passengers can control the bus doors under the state of abnormal condition via manual control devices in series connection rapidly. Driver and passengers control is without mutual interference. Manual shift directional valves are convenient, reliable and fast.