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

A 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 flow of a damping fluid between an upper chamber and a lower chamber of a shock absorber through the first pair of passive flow-control valves (18, 20) and 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 lower chamber through only 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).