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Patent Searching and Data


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)
Application Number:
PCT/JP2021/045193
Publication Date:
September 15, 2022
Filing Date:
December 08, 2021
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/20; F15B11/00; F15B11/02
Foreign References:
JP3403535B22003-05-06
JP2001323901A2001-11-22
JPH1130204A1999-02-02
JP2020133705A2020-08-31
JP3403535B22003-05-06
Attorney, Agent or Firm:
KAICHI IP (JP)
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