Open center hydraulic system

摘要

An open center hydraulic system (10) that includes a variable displacement pump (12) having an inlet (14), an outlet (16) and a sensing port (18), the pump (12) configured to provide reduced fluid flow in response to a predetermined fluid pressure differential between the outlet (16) and the sensing port (18). A first fluid circuit (20) and a second fluid circuit (22) each serve as signal lines with the pump sensing port (18). During operation of the second fluid circuit (22), reduced fluid flow from the pump outlet (16) is achieved as a result of the sum of induced fluid pressure reductions of respective controlled pressure reduction devices (34, 36) approaching the predetermined pump fluid pressure differential.