Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/194952
Kind Code:
A1
Abstract:
Provided is a work machine capable of notifying that maintenance is needed due to ongoing clogging of a cooling device or a drop in cooling performance. A wheel loader 1, which is provided with a radiator 31 or an oil cooler 32, comprises controllers 5, 5A which determine an ongoing state of clogging of the radiator 31 or the oil cooler 32. The controllers 5, 5A determine whether the radiator 31 or the oil cooler 32 is clogged on the basis of an outside air temperature AW and a cooling water temperature CW or a working oil temperature HW, determine whether clogging is ongoing on the basis of clogging occurrence ratios R1, R2 in operation of an engine 30, and output, to a warning buzzer 61 or a user management system 62, an notification instruction signal instructing notification that maintenance is needed if it is determined that clogging is ongoing.
Inventors:
HYODO KOJI (JP)
YOSHIKAWA MASAKI (JP)
ITO KAZUYUKI (JP)
TANAKA TETSUJI (JP)
SHIMAZAKI KOUJI (JP)
AOKI ISAMU (JP)
YOSHIKAWA MASAKI (JP)
ITO KAZUYUKI (JP)
TANAKA TETSUJI (JP)
SHIMAZAKI KOUJI (JP)
AOKI ISAMU (JP)
Application Number:
PCT/JP2019/050790
Publication Date:
October 01, 2020
Filing Date:
December 25, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F01P11/12; B60K11/04; B60K11/08; E02F9/00; F01M5/00; F01P5/04; F01P11/14
Foreign References:
| JP2012196146A | 2012-10-18 | |||
| JP2005500935A | 2005-01-13 | |||
| JPH02130216A | 1990-05-18 | |||
| JPH09132041A | 1997-05-20 |
Other References:
See also references of EP 3832083A4
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
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