Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/213027
Kind Code:
A1
Abstract:
In order to enhance the responsiveness of an electromagnetic valve device to an operation, this work machine is provided with: an electromagnetic valve device which controls the flow of a pressure oil supplied from a hydraulic pump to a hydraulic actuator; an operation member through which the electromagnetic valve device is operated; and an operation position determining unit which determines whether the operation member is disposed within a preset neutral range. The work machine is provided with: an operation intention determining unit which determines whether an operator intends to operate the operation member on the basis of a state change of the operation member; a current supplying unit which supplies current to the electromagnetic valve device on the basis of an operation of the operation member; and a current control unit which allows a standby current, which is lower than a current at the time when the hydraulic actuator starts an operation, to be supplied from the current supplying unit to the electromagnetic valve device, when the operation position determining unit determines that the operation member is disposed within the neutral range and the operation intention determining unit determines that there is an intention to operate the operation member.
Inventors:
TSUCHIE YOSHIYUKI (JP)
SAKAMOTO HIROSHI (JP)
SAKAMOTO HIROSHI (JP)
Application Number:
PCT/JP2017/020523
Publication Date:
December 14, 2017
Filing Date:
June 01, 2017
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/20; F15B11/08
Foreign References:
| JPH11287207A | 1999-10-19 | |||
| JP2013014981A | 2013-01-24 | |||
| JP2010248867A | 2010-11-04 | |||
| JP2011006862A | 2011-01-13 | |||
| US20110071739A1 | 2011-03-24 |
Other References:
See also references of EP 3467211A4
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
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