Pilot control circuit for load sensing hydraulic systems

Details Pilot control circuit for load sensing hydraulic systems Pilot control circuit for load sensing hydraulic systems

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 11/08 (2006.01) F15B 13/042 (2006.01)

Patent

CA 2062778

2062778 9119106 PCTABS00008 Pilot control circuits are useful, for example, for controlling the actuation of main control valves of load sensing hydraulic systems. Using the main supply pump as the source of pressurized pilot fluid sometimes results in inadequate pilot pressure for maintaining the main control valves in an actuated position under some operating conditions. The subject pilot control system (24) includes an accumulator (42) to store pressurized fluid received from the main supply pump for use by the pilot control circuit when the pressure level of the main hydraulic system momentarily drops below a level for proper pilot control operation. Thus, the main control valves are maintained in their actuated position irregardless of the pressure level of the fluid in the main supply system.

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