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Patent Searching and Data


Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/145182
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a work machine in which, during a combined operation for simultaneously driving a specified actuator for regenerating a return oil and another actuator, the speed control for each actuator and the thrust control for the specified actuator can be performed with a simple configuration. To do so, a controller: calculates target thrust, which is a target value for the thrust of the specified actuator, on the basis of an input amount of an operation device and an output value of a posture sensor; calculates a target meter-out pressure, which is a target value for a meter-out pressure of the specified actuator, on the basis of the target thrust and a meter-in pressure of the specified actuator; and calculates a target regeneration control valve opening area, which is a target value for the opening area of the regeneration control valve, on the basis of the target meter-out pressure and the meter-out pressure of the specified actuator.

Inventors:
KUMAGAI KENTO (JP)
IMURA SHINYA (JP)
TSURUGA YASUTAKA (JP)
CHIBA TAKAAKI (JP)
YAMAMOTO SHINJIROU (JP)
AMANO HIROAKI (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
Application Number:
PCT/JP2022/040741
Publication Date:
August 03, 2023
Filing Date:
October 31, 2022
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F15B11/00; E02F9/22; F15B11/028; F15B11/042; F15B11/044
Domestic Patent References:
WO2021200244A12021-10-07
Foreign References:
JPH07158604A1995-06-20
JP2022001769A2022-01-06
US20140283676A12014-09-25
JP5214450B22013-06-19
JP3511425B22004-03-29
Attorney, Agent or Firm:
KAICHI IP (JP)
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