Hydraulisches System für eine Arbeitsmaschine, Arbeitsmaschine und Verfahren zur Steuerung der Arbeitsmaschine

Details

Veröffentlichungs-Nr.

EP4726220

Anmeldetag

7. Mai 2024

Veröffentlichung

12. Dezember 2024

Rechtsraum

EP

Abstract

The present invention easily reduces the influence of air entrainment in hydraulic fluid in fluid chambers (E1, E2, DE) on a hydraulic device (C). A hydraulic system (S) for a working machine (1) includes: a hydraulic pump (P); a hydraulic device to be actuated by hydraulic fluid delivered by the hydraulic pump to drive the working machine; a solenoid proportional valve (SV) to adjust a flow rate and/or a pressure of hydraulic fluid supplied from the hydraulic pump to the hydraulic device; and a controller (70) configured or programmed to control the solenoid proportional valve. The solenoid proportional valve includes: a housing (80); a spool (83) housed in the housing; a coil (85) to be controlled by the controller, and a moving portion (87) to be caused by a magnetic flux generated by the coil to move the spool. The housing includes a fluid chamber to store hydraulic fluid, the fluid chamber having a volume that changes with movement of the spool. The controller is configured or programmed to include an air-bleeding mode in which the controller controls the coil to cause the moving portion to reciprocate a plurality of times in an axial direction of the spool.

Anmelder

Firma

KUBOTA CORPORATION

Land

🇯🇵 Japan