Valve Unit

In the valve unit, four bellows valves and the pressure accumulator valve are activated. The bellows valves and the pressure accumulator valve are solenoid valves which are closed under spring pressure when de-energized.

Fig 1: Pneumatic Layout Of Control Valve

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Control Valve Schematic

Courtesy of BMW OF NORTH AMERICA, INC.