Torque and high pressure limiting control for variable...

Details Torque and high pressure limiting control for variable... Torque and high pressure limiting control for variable...

F - Mech Eng,Light,Heat,Weapons

16

D

138/63

F16D 31/02 (2006.01) F04B 1/32 (2006.01) F04B 49/08 (2006.01)

Patent

CA 1177725

Torque and High Pressure Limiting Control for Variable Displacement Pumps Abstract It is common practice to provide the servo- system for a variable displacement pump with a "load- plus" valve to maintain pump discharge pressure above a minimum pressure level and above a load pressure in a fluid actuator connected to the pump in response to the load pressure in the actuator. Systems of this type are normally lacking in a device for ensuring that the prime mover for the pump functions at maximum efficiency. This invention is directed to a pressure and horsepower limiting valve (24) for ensuring such efficiency by modulating a load pressure signal (PL) communicated to the "load-plus" valve (23).

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