Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2019/240133
Kind Code:
A1
Abstract:
Provided is a work machine with which the responsiveness of a hydraulic actuator can be improved when driving the hydraulic actuator via an electric lever-type operation device. In the present invention, a controller 100 further has: an operation direction determining unit 116 that determines the operation directions of operation devices 2a, 2b; and a standby pressure switching command unit 117 that outputs a standby pressure switching command to a first target pilot pressure correction unit 112 or a second target pilot pressure correction unit 113 which corresponds to a solenoid proportional valve that does not correspond to the operation direction from among first solenoid proportional valves 41a, 42a, 42b, 43a, 43b, 44a and second solenoid proportional valves 41b, 42c, 42d, 43c, 43d, 44b. When the standby pressure switching command is input, the first target pilot pressure correction unit 112 and the second target pilot pressure correction unit 113 switch the first standby pressure α to a second standby pressure β set lower than the first standby pressure.
Inventors:
KOBAYASHI HIROYUKI (JP)
TSUCHIE YOSHIYUKI (JP)
MORIKI HIDEKAZU (JP)
SAKAMOTO HIROSHI (JP)
TSUCHIE YOSHIYUKI (JP)
MORIKI HIDEKAZU (JP)
SAKAMOTO HIROSHI (JP)
Application Number:
PCT/JP2019/023120
Publication Date:
December 19, 2019
Filing Date:
June 11, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F15B11/028; E02F9/20; F15B11/08; F15B21/045
Foreign References:
| JP2015175174A | 2015-10-05 | |||
| JP2017110774A | 2017-06-22 | |||
| JPH0579503A | 1993-03-30 |
Other References:
See also references of EP 3805575A4
Attorney, Agent or Firm:
KAICHI IP (JP)
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