Power transmission

Details Power transmission Power transmission

F - Mech Eng,Light,Heat,Weapons

04

B

138/78.1

F04B 1/26 (2006.01) F04B 1/32 (2006.01) F04B 49/00 (2006.01) F04B 49/06 (2006.01)

Patent

CA 1196837

POWER TRANSMISSION Abstract of the Disclosure A variable displacement pump control system com- prising a variable displacement pump having a movable element for controlling pump displacement, a hydraulic motor for moving the movable element, and a transducer for producing an electric signal corresponding to the actual position of the movable element. A comparator compares the electrical signal from the transducer and an electrical signal corresponding to the desired dis- placement of the pump and produces an error signal. A control operates in response to the error signal to meter fluid flow from the pump output to the hydraulic motor. The control comprises a relief valve, a compensator valve and a servo valve. The servo valve is preferably a single- stage valve that includes damping orifices to provide stability.

422206

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