FLUID PRESSURE CONTROL CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a fluid pressure control circuit improving an operating efficiency of an accumulator. SOLUTION: The head side of a potential energy recovery cylinder Cy1 is provided in communication with the accumulator Acc through one recovery control valve 1. The discharge passage of a main pump Pp1 driven by an engine E is provided in communication with the accumulator Acc through the other recovery control valve 2. The suction port of a dedicated pump Pp2 driven together with the pump Pp1 by the engine E is connected to the accumulator Acc. The discharge port of the dedicated pump Pp2 is provided in communication with a recovery passage between the head and rod through one reuse control valve 3, and is provided in communication with the discharge passage of the main pump Pp1 through the other reuse control valve 4. COPYRIGHT: (C)2010,JPO&INPIT