Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/182010
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a work machine in which the tracking of a drive speed to a target speed of a hydraulic actuator can be improved. To this end, a controller: calculates a target speed for a boom in accordance with an input amount from an operation lever; calculates an actuator target flowrate on the basis of the target speed; calculates a pump target flowrate on the basis of the actuator target flowrate; calculates a target meter-in pressure, which is the target value for the meter-in pressure of an actuator, on the basis of the input amount from the operation lever, the output value of an inertial measurement device, and the meter-out pressure of the actuator; calculates the difference between the target speed and the drive speed of the boom as a speed error; calculates the difference between the meter-in pressure and the target meter-in pressure as a pressure error; and corrects the pump target flowrate in accordance with the speed error and the pressure error.
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Inventors:
ITOU RYOUSUKE (JP)
AMANO HIROAKI (JP)
KUMAGAI KENTO (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
AMANO HIROAKI (JP)
KUMAGAI KENTO (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
Application Number:
PCT/JP2023/009422
Publication Date:
September 28, 2023
Filing Date:
March 10, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/22; F15B11/00; F15B11/044
Foreign References:
| JP2017020233A | 2017-01-26 | |||
| JP2020133705A | 2020-08-31 | |||
| JP2020041603A | 2020-03-19 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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