Title:
WORKING MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/201158
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a working machine which is capable of increasing an operating speed of an actuator by means of a regeneration function, while securing the position control accuracy of the actuator. To this end, a controller: calculates target actuator supply flow rates by deducting regeneration flow rates from a target actuator flow rate; calculates a target flow rate control valve opening amount on the basis of the target actuator supply flow rates; calculates a target pump flow rate that is equal to or greater than the sum of the target actuator supply flow rates; controls a flow rate control valve according to the target flow rate control valve opening amount; and controls a hydraulic pump according to the target pump flow rate.
Inventors:
KUMAGAI KENTO (JP)
IMURA SHINYA (JP)
TSURUGA YASUTAKA (JP)
CHIBA TAKAAKI (JP)
AMANO HIROAKI (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
SUGIYAMA GENROKU (JP)
YAMAMOTO SHINJIRO (JP)
IMURA SHINYA (JP)
TSURUGA YASUTAKA (JP)
CHIBA TAKAAKI (JP)
AMANO HIROAKI (JP)
NISHIKAWA SHINJI (JP)
NARAZAKI AKIHIRO (JP)
SUGIYAMA GENROKU (JP)
YAMAMOTO SHINJIRO (JP)
Application Number:
PCT/JP2021/013993
Publication Date:
October 07, 2021
Filing Date:
March 31, 2021
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F3/43; E02F9/22; F15B11/02; F15B11/024; F15B11/042; F15B11/044; F15B11/08; F15B11/16
Domestic Patent References:
| WO2018235779A1 | 2018-12-27 |
Foreign References:
| JP2018003516A | 2018-01-11 | |||
| JPH11101202A | 1999-04-13 | |||
| JP3056254B2 | 2000-06-26 | |||
| JPS594680B2 | 1984-01-31 | |||
| JP2018003516A | 2018-01-11 |
Other References:
See also references of EP 4101991A4
Attorney, Agent or Firm:
KAICHI IP (JP)
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