Solenoid valve for control of injection valve of IC engine with solenoid and movable armature and control valve element working together with valve seat for opening/closing fuel

摘要

The solenoid valve (2) is designed so that the slide piece (40) subdivides the armature chamber into unloading chambere (52) connecting with a fuel lower pressure connection (10) and a hydraulic damping chamber (51), in which the fuel discharge duct (17) opens out. The damping chamber is relievable across at least one connecting duct (44,47) provided with a throttle (43,48) to the unloading chamber. So that the speed of the control valve element (25,26) with the closing of the solenoid valve, before the impact at the valve seat (24), is reduced by a fuel pressure cushion reacting on the damping chamber on the control valve element.