Title:
HYDRAULIC SYSTEM OF WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/127552
Kind Code:
A1
Abstract:
The present invention enables a reduction in the vibration noise caused by an electromagnetic proportional valve (45) in accordance with the temperature of hydraulic oil. A hydraulic system (S) of a work machine (1) comprises: a hydraulic actuator (AC) driven by hydraulic oil; an electromagnetic proportional valve (45) that controls the hydraulic actuator (AC) in accordance with a current to be supplied; and a control device (70) that controls the current to be supplied to the electromagnetic proportional valve (45), wherein the control device (70) changes the dither amplitude of the current to be supplied to the electromagnetic proportional valve (45) in accordance with the temperature of the hydraulic oil.
Inventors:
HORII HIROSHI (JP)
MORI HIROYA (JP)
MORI HIROYA (JP)
Application Number:
PCT/JP2022/046438
Publication Date:
July 06, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
F15B21/045; E02F9/20
Foreign References:
| JPH0579503A | 1993-03-30 | |||
| JP2021175911A | 2021-11-04 | |||
| JPH02300581A | 1990-12-12 |
Attorney, Agent or Firm:
YASUDA & OKAMOTO PATENT ATTORNEYS (JP)
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