Control system and method for pump output pressure control

F - Mech Eng,Light,Heat,Weapons – 04 – C

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F04C 14/24 (2006.01) F01M 1/02 (2006.01) F01M 1/20 (2006.01)

Patent

CA 2663123

A pump system includes pump having a control feature which, responsive to a supply of pressurized working fluid, reduces the pressure of the working fluid pressurized by the pump. The control feature is connected to the output of the pump by a regulating valve. The control feature receives pressurized working fluid to decrease the output of the pump in response to the pressure of the supplied working fluid. A regulating valve selectively connects the pressurized working fluid to the control feature. The regulating valve has a control port to receive pressurized working fluid from the pump to urge the valve to a closed position against a biasing force. A controllable valve is operable to interrupt the supply of pressurized working fluid to control port to alter the output pressure of the pump.

Système de pompe comprenant une pompe dotée d'une fonction de régulation qui, en réponse à la fourniture d'un fluide de travail sous pression, réduit la pression du fluide de travail sous pression par la pompe. La fonction de régulation est connectée à la sortie de la pompe par une soupape de régulation. La fonction de régulation reçoit un fluide de travail sous pression dans le but de réduire la sortie de la pompe en réponse à la pression du fluide de travail fourni. Une soupape de régulation connecte de façon sélective le fluide de travail sous pression à la fonction de régulation. La soupape de régulation comprend un orifice de commande destiné à recevoir un fluide de travail sous pression en provenance de la pompe dans le but de forcer la soupape vers une position fermée à l'encontre d'une force de sollicitation. Une soupape réglable peut être utilisée afin d'interrompre la fourniture de fluide de travail sous pression vers l'orifice de commande dans le but d'altérer la pression de sortie de la pompe.

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