HYDRAULIC DISTRIBUTING VALVE Russian patent published in 2002 - IPC

FIELD: hydraulic equipment. SUBSTANCE: invention relates to hydraulic distributing valve used in valve-type fuel injecting nozzle. Proposed valve with valve element has control piston loaded by spring in direction of closing of valve element to hold the latter ion contact with valve seat. Piston limits bypass space which is limited by piezoelectric drive. With drive moving, pressure in said bypass space increases and control piston overcomes resistance of spring and moves in direction of opening. Drive is installed in parallel with control piston close to piston. Bypass space is divided into first and second parts placed in communication through channel which is provided with throttling section. Channel passes square to axis of control piston. EFFECT: enlarged operating capabilities of hydraulic distributing valve, improved reliability of valve. 4 cl, 2 dwg