Title:
作業機械の制御装置
Document Type and Number:
Japanese Patent JP7089497
Kind Code:
B2
Abstract:
To provide a control device for a work machine that can deal with water mixed in the hydraulic oil used for a hydraulic system of the work machine.SOLUTION: A control device 190 of a work machine comprises a storage device 191 that stores a rate-of-change-reference value, which is a threshold value of a rate of change in viscosity of hydraulic oil; and a processing device 192 connected to a viscosity sensor 170, a notification device 180, and the storage device 191. The processing device 192 records a viscosity input from the viscosity sensor 170 from start to stop of the work machine 100, in the storage device 191 as time-series viscosity data. Further, the processing device 192 compares the rate of change in viscosity calculated based on the time-series viscosity data with the rate-of-change-reference value, and outputs the result of the comparison to the notification device 180.SELECTED DRAWING: Figure 1
Inventors:
Akira Kurasako
Hideki Akita
Hideki Akita
Application Number:
JP2019162009A
Publication Date:
June 22, 2022
Filing Date:
September 05, 2019
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
E02F9/26; E02F9/22; F15B20/00
Domestic Patent References:
| JP2016113819A | ||||
| JP6117987A | ||||
| JP2000303504A | ||||
| JP2014129733A | ||||
| JP2007138712A |
Foreign References:
| WO2019021502A1 | ||||
| EP3382109A1 |
Attorney, Agent or Firm:
Hiraki International Patent Office