Title:
Work machine
Document Type and Number:
Japanese Patent JP6360824
Kind Code:
B2
Abstract:
Regeneration control is exercised and energy saving is realized even when an abnormality occurs to pressure sensors for hydraulic actuators. A work machine includes: a hydraulic pump (41b) that supplies a hydraulic fluid to a second hydraulic actuator (34); a regeneration circuit (47) that regenerates a return hydraulic fluid from a first hydraulic actuator (32) between the second hydraulic actuator (41b) and the hydraulic pump (41b); a discharge circuit (46) that discharges the return hydraulic fluid from the first hydraulic actuator (32) to a tank; a regeneration amount regulation device (45) that regulates a proportion of a flow rate of the return hydraulic fluid flowing to the regeneration circuit (47) and a flow rate of the return hydraulic fluid flowing to the discharge circuit (46); a controller (100) that controls the regeneration amount regulation device (45); a first operation amount sensor (53a) that detects an operation amount of the first operation device (51); and a first hydraulic actuator speed computing unit (111) that computes a speed of the first hydraulic actuator (32). The controller (111) controls the regeneration amount regulation device on the basis of the operation amount detected by the first operation amount sensor (53a) and the speed computed by the first hydraulic actuator speed computing unit (111).
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Inventors:
Shinya Imura
Hijikata Seiji
Hijikata Seiji
Application Number:
JP2015250590A
Publication Date:
July 18, 2018
Filing Date:
December 22, 2015
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
F15B21/14; E02F9/22; F15B11/024; F15B20/00
Domestic Patent References:
| JP200889023A | ||||
| JP2015190518A | ||||
| JP201675302A |
Attorney, Agent or Firm:
Kaichi International Patent Office