FOUR-PORT THREE-POSITION HYDRAULIC CONTROL VALVE WITH RESERVED ELECTRIC POWER CONTROLLED WHEEL STEERING DRIVE OF FRONT CHASSIS SUPPORT OF VEHICLE WITH HYDRAULIC DAMPER Russian patent published in 2008 - IPC B64C13/42 F15B13/00 B62D5/00 

FIELD: transport.

SUBSTANCE: hydraulic control valve with reserved electric power controlled wheel steering drive of front chassis support of vehicle refers to engineering electro-hydraulic automatics and may be used in drive gear with highly reliable reserved electric power remote control. Hydraulic control valve contains casing with channel ducts for hydraulic feeding and work cavity channels, electric hydraulic valve with double-wound coil and ball valve, ring valve, hydraulic compensator with lid and spring-loaded piston, safety and feeder valves between work cavity channels, needle-shaped throttle with adjusting screw, and two-stage electrohydraulic amplifier. There is throttle orifice in ring valve collar, orifice being connected with needle-shaped throttle and spring-loaded valve cavity, hydraulic compensator lid being separated from ambient air by pneumatic check valve.

EFFECT: increase of reliability, guaranteed life increase.

3 cl, 4 dwg