Title:
HYDRAULIC CONTROL DEVICE, HYDRAULIC CIRCUIT CONTROL METHOD, AND HYDRAULIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/075426
Kind Code:
A1
Abstract:
This hydraulic control device comprises: a virtual bleed information output unit that, on the basis of an operation amount for an operating tool 35, a discharge pressure of a hydraulic pump 22, and a virtual bleed characteristic that is set in advance and is a characteristic of a virtual bleed circuit in which a control valve and a hydraulic oil tank are assumed to be connected via a bypass line, outputs virtual bleed information 75 indicating the state of hydraulic oil flowing through the virtual bleed circuit; a request bleed information output unit that outputs requested bleed information 77, which indicates the state of the hydraulic oil flowing through the virtual bleed circuit and which is required in order to cause a hydraulic actuator to perform a desired operation that corresponds to the operation amount; a target control value determination unit that determines a target control value for the hydraulic pump 22 in accordance with a comparison result between the virtual bleed information 75 and the requested bleed information 77; and a pump control unit that controls the hydraulic pump 22 in accordance with the target control value.
Inventors:
NAGATOMI YUICHI (JP)
FUSHIMI JUNYA (JP)
FUSHIMI JUNYA (JP)
Application Number:
PCT/JP2023/030690
Publication Date:
April 11, 2024
Filing Date:
August 25, 2023
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
F15B11/044; E02F9/22; F15B11/02
Domestic Patent References:
| WO2013128622A1 | 2013-09-06 |
Foreign References:
| JPH1047306A | 1998-02-17 | |||
| JP2011094687A | 2011-05-12 | |||
| US20190024677A1 | 2019-01-24 |
Attorney, Agent or Firm:
R&C IP LAW FIRM (JP)
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