Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/190491
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a work machine with which it is possible to ensure high operability by preventing an actuator from thrusting out or preventing a vehicle body from undergoing shock using a bleed-off function when the actuator is starting up, and to improve energy-saving properties by reducing a bleed-off flow rate after the actuator has started up. In order to achieve this purpose, a controller opens a bleed-off valve at a timing that is during operation of an operating device and before the flow rate of a hydraulic pump begins to increase, and closes the bleed-off valve at a timing that is during operation of the operating device and after the flow rate of the hydraulic pump has begun to increase.
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/JP2021/045193
Publication Date:
September 15, 2022
Filing Date:
December 08, 2021
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/20; F15B11/00; F15B11/02
Foreign References:
JP3403535B2 | 2003-05-06 | |||
JP2001323901A | 2001-11-22 | |||
JPH1130204A | 1999-02-02 | |||
JP2020133705A | 2020-08-31 | |||
JP3403535B2 | 2003-05-06 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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