Title:
WORKING MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/191084
Kind Code:
A1
Abstract:
A control device of this working machine: calculates a target speed of a fluid pressure actuator in accordance with an operation signal from an operating device; calculates a target thrust or a target torque of the fluid pressure actuator on the basis of a driving state of the fluid pressure actuator; and if the sign of the target speed resulting from the calculation is different from the sign of the target thrust or the target torque resulting from the calculation, controls a speed of the fluid pressure actuator by means of a meter-out control valve, on the basis of the operation signal from the operating device, and controls at least one of a pump and a meter-in control valve such that a meter-in side pressure of the fluid pressure actuator is equal to or greater than a prescribed value.
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Inventors:
AMANO HIROAKI (JP)
KUMAGAI KENTO (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
KUMAGAI KENTO (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
Application Number:
PCT/JP2023/013664
Publication Date:
October 05, 2023
Filing Date:
March 31, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/22; E02F9/20; F15B11/02; F15B11/028; F15B11/044
Domestic Patent References:
| WO2022208694A1 | 2022-10-06 |
Foreign References:
| JP2014098404A | 2014-05-29 | |||
| JP2020029717A | 2020-02-27 | |||
| JP2000310201A | 2000-11-07 | |||
| JP2012237423A | 2012-12-06 | |||
| JP2022017833A | 2022-01-26 | |||
| JPH02142902A | 1990-06-01 | |||
| JP2019124227A | 2019-07-25 | |||
| JPH06117408A | 1994-04-26 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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