PISTON FOR A DAMPING-ADJUSTABLE SHOCK-ABSORBER, PARTICULARLY FOR A VEHICLE SUSPENSION, PROVIDED WITH FOUR PASSIVE FLOW-CONTROL VALVES AND WITH A FLOW-DIVIDING SOLENOID VALVE

摘要

The piston (10) comprises a first pair of passive flow-control valves (18, 20), namely a first compensation valve (18) and a first rebound valve (20), a second pair of passive flow- control valves (22, 24), namely a second compensation valve (22) and a second rebound valve (24), and a flow-dividing solenoid valve (14) shiftable between a first operating position, in which it allows the flow of a damping fluid between an upper chamber and a lower chamber of the shock-absorber both through the first pair of passive flow-control valves (18, 20) and through the second pair of passive flow-control valves (22, 24), and a second operating position, in which it allows the flow of the damping fluid between the upper chamber and the lower chamber of the shock-absorber only through the second pair of passive flow-control valves (22, 24). The solenoid valve (14) is normally open, i.e. it is normally kept in the first operating position.