Air brake control system having an electromagnetic valve device which has two set points for establishing a lap position

摘要

An electromagnetic valve control system employing a controller circuit for controlling the position of a pneumatic valve by regulating the magnetizing current provided to the electrical solenoid by establishing a first magnetizing current set point when the valve is to be moved from a release position to a lap position and by establishing a second magnetizing current set point when the valve is to be moved from an application position to a lap position.