Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2024/070905
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a work machine in which deterioration of the speed response of a hydraulic cylinder that drives a work device, and waving or runaway of the hydraulic cylinder, are prevented, thereby making it possible to perform work with high precision. To accomplish this purpose, a controller calculates a correction value for a target operating pressure of a flow rate control valve for keeping a meter-out pressure of a hydraulic cylinder, which is measured while the hydraulic cylinder is driven to cause the work device to perform a prescribed operation, within a range from a prescribed first lower-limit value to a prescribed first upper-limit value, and the controller corrects the target operating pressure in accordance with the correction value.
Inventors:
ABE KOTA (JP)
IGARASHI TERUKI (JP)
NARAZAKI AKIHIRO (JP)
IGARASHI TERUKI (JP)
NARAZAKI AKIHIRO (JP)
Application Number:
PCT/JP2023/034378
Publication Date:
April 04, 2024
Filing Date:
September 21, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F3/43; E02F9/22; E02F9/26
Domestic Patent References:
| WO2022137872A1 | 2022-06-30 | |||
| WO2021065384A1 | 2021-04-08 |
Foreign References:
| JP2021152307A | 2021-09-30 | |||
| JP2020153461A | 2020-09-24 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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