Title:
HYDRAULIC SYSTEM OF WORK MACHINE AND WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/127303
Kind Code:
A1
Abstract:
The response delay of a proportional solenoid valve (45 (145)) is suppressed without excessive increase in power consumption. A hydraulic system (HS (HS1)) of a work machine (1) is provided with a hydraulic actuator (AC) driven by a hydraulic oil, a control valve (V) that performs switching operation for switching the flow volume of the hydraulic oil supplied to the hydraulic actuator (AC), and a control device (70) for controlling the control valve (V), wherein: the control valve (V) is provided with a solenoid (S) and performs the switch operation on the basis of a current supplied to the solenoid (S); and the control device (70) supplies to the solenoid (S) a shift current (101) for causing the control valve (V) to perform the switching operation and, when the shift current (101) is not being supplied, intermittently supplies a standby current (100), which is lower than the shift current (101) and has a current value (Is) within a range where the control valve (V) does not perform the switching operation.
Inventors:
HORII HIROSHI (JP)
MORI HIROYA (JP)
MORI HIROYA (JP)
Application Number:
PCT/JP2022/041050
Publication Date:
July 06, 2023
Filing Date:
November 02, 2022
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
F15B21/045; E02F9/20
Foreign References:
| JP2009509837A | 2009-03-12 | |||
| JP2020159465A | 2020-10-01 | |||
| US20110266270A1 | 2011-11-03 | |||
| JPH02209603A | 1990-08-21 |
Attorney, Agent or Firm:
YASUDA & OKAMOTO PATENT ATTORNEYS (JP)
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