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Patent Searching and Data


Title:
WORKING MACHINE MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/044660
Kind Code:
A1
Abstract:
The present invention is capable of preventing, in advance, the damage of hydraulic parts of a working machine due to the performance deterioration of an operating oil even when the operating oil of a hydraulic system is changed and becomes a mixed oil in which a mineral oil and a biodegradable oil are mixed. To this end, a storage device stores oil change history information about an operating oil, an oil type determination value for determining whether the operating oil is a mineral oil, a biodegradable oil, or a mixture of the mineral oil and the biodegradable oil, and an abnormality determination value for each kind of the operating oil, and a controller checks whether oil change information in which an oil type is not determined exists in the oil change history information, and, when there is oil change information in which an oil type is not determined, determines the type of the operating oil on the basis of the oil type determination value and each value of a plurality of oil properties detected by an oil sensor and determines the abnormality of the operating oil by using the abnormality determination value corresponding to the determination result of the operating oil type.

Inventors:
KURASAKO AKIRA (JP)
AKITA HIDEKI (JP)
MOTOKI HIDEKAZU (JP)
Application Number:
PCT/JP2020/016623
Publication Date:
March 11, 2021
Filing Date:
April 15, 2020
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/22; E02F9/26; F15B20/00
Domestic Patent References:
WO2019021502A12019-01-31
Foreign References:
JP2007292238A2007-11-08
JP2017191064A2017-10-19
JP2018178747A2018-11-15
Attorney, Agent or Firm:
KAICHI IP (JP)
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