| 摘要 |
PURPOSE: A pneumatic system is provided to prevent a bus from starting with the door open by allowing the bus door to open only when the bus has stopped completely. CONSTITUTION: A pneumatic system for preventing a bus from starting with the door open is as follows. Door opening sensors are installed on a front door(10) and a rear door(20) of the bus. A third solenoid valve for controlling the operation of a parking brake by regulating the pressure of the air injected in into the parking brake in response to the signals from the door opening sensors is installed between the parking brake(112) and an air tank(111) with a second supply line(S2).
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