Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/054507
Kind Code:
A1
Abstract:
Provided is a construction machine that is capable of controlling, with a high degree of accuracy, branch currents flowing from a hydraulic pump to a plurality of hydraulic actuators. A controller (100) has a meter-out valve control unit (140) that calculates either a target opening area of a second meter-out valve (65a, 65b) in accordance with a pressure difference between a supply pressure and a second meter-in pressure or a target opening area of a first meter-out valve (55a, 55b) in accordance with a pressure difference between the supply pressure and a first meter-in pressure.
Inventors:
MORIKI HIDEKAZU (JP)
KANAZAWA AKIRA (JP)
CHIBA TAKAAKI (JP)
IMURA SHINYA (JP)
TSURUGA YASUTAKA (JP)
KANAZAWA AKIRA (JP)
CHIBA TAKAAKI (JP)
IMURA SHINYA (JP)
TSURUGA YASUTAKA (JP)
Application Number:
PCT/JP2019/034581
Publication Date:
March 19, 2020
Filing Date:
September 03, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F15B11/05; E02F9/22; F15B11/042; F15B11/044
Foreign References:
| JPH06117408A | 1994-04-26 | |||
| JPH06117408A | 1994-04-26 |
Other References:
See also references of EP 3795844A4
Attorney, Agent or Firm:
KAICHI IP (JP)
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