HYDRAULIC SYSTEM FOR WORK MACHINE

PROBLEM TO BE SOLVED: To provide a hydraulic system for a work machine. SOLUTION: In one embodiment, the hydraulic system is provided with a hydraulic pump and at least one meter-in spool valve. Each spool valve has an inlet and an outlet. At least one hydraulic actuator is provided, and each hydrau...

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Bibliographische Detailangaben
1. Verfasser: YOSHINO KAZUNORI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a hydraulic system for a work machine. SOLUTION: In one embodiment, the hydraulic system is provided with a hydraulic pump and at least one meter-in spool valve. Each spool valve has an inlet and an outlet. At least one hydraulic actuator is provided, and each hydraulic actuator is fluidly coupled with the corresponding spool valve outlet. A load hold check valve fluidly interconnects the hydraulic pump with the spool valve inlet. A tank and at least one poppet valve assembly are provided. Each poppet valve assembly is fluidly coupled with the corresponding spool valve outlet and the actuator. Each poppet valve assembly selectively interconnects the corresponding actuator with the tank or atmospheric pressure. COPYRIGHT: (C)2009,JPO&INPIT