35
Design and function
The PDC valve influences the flow
resistance of the working
chamber on the piston rod side
(working chamber 1).
Working chamber 1 is connected
to the PDC valve via bore holes.
The PDC valve has a low flow
resistance when the air spring
pressure is low (no load or small
partial load). Part of the damping
oil bypasses the damping valve,
thereby reducing the damping
force.
The flow resistance of the PDC
valve has a fixed relation to the
control pressure (air spring
pressure).
The damping force is dependent
on the flow resistance of the
relevant damping valve
(compression/rebound) plus that
of the PDC valve.
242_033
PDC valve
Working chamber 1
Bottom valve
Piston valve with
sealing collar
Working
chamber 2
Bores
Gas filling
Throttle in air connector
Rebound stop
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