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Title:
BOOM CONTROL SYSTEM FOR WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/176653
Kind Code:
A1
Abstract:
A boom cylinder (10) drives a boom (6) and comprises a head-side oil chamber (10h) and a bottom-side oil chamber (10b). A first valve (21) comprises a first opening (21c) through which oil from the head-side oil chamber (10h) is discharged to an oil tank (25), and supplies oil from a hydraulic pump (20) to the head-side oil chamber (10h). A second valve (22) comprises a second opening (22c) through which oil from the bottom-side oil chamber (10b) is discharged to the oil tank (25), and supplies oil from the hydraulic pump (20) to the bottom-side oil chamber (10b). During work including operation of the boom (6), a controller (30) separately controls an opening degree (D1) of the first opening (21c) and an opening degree (D2) of the second opening (22c).

Inventors:
YAMAGOE YOSUKE (JP)
Application Number:
PCT/JP2022/004521
Publication Date:
August 25, 2022
Filing Date:
February 04, 2022
Export Citation:
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Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
E02F3/43; E02F9/22; F15B11/044
Foreign References:
JPH10168950A1998-06-23
JP2000204601A2000-07-25
JP2011002092A2011-01-06
JPS5238101U1977-03-17
JPH11158942A1999-06-15
JP2011236562A2011-11-24
JP2020153506A2020-09-24
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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