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Title:
FAN DRIVE SYSTEM AND MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/131118
Kind Code:
A1
Abstract:
This fan drive system is provided with: a hydraulic pump; a hydraulic motor that rotates a fan on the basis of a hydraulic oil supplied from the hydraulic pump; a data acquisition unit that acquires the actual rotation speed of the fan; a target quantity determining unit that determines the target rotation speed of the fan on the basis of the state of a subject to be cooled by the fan; and an estimation unit that estimates the state of the hydraulic pump or the state of the hydraulic motor on the basis of a feedback quantity change indicating the difference between the target rotation speed and the actual rotation speed.

Inventors:
OHSHIRO, Mitsuru (2-3-6 Akasaka, Minato-k, Tokyo 14, 〒1078414, JP)
OGASAWARA, Kenichi (2-3-6 Akasaka, Minato-k, Tokyo 14, 〒1078414, JP)
HIRANO, Masahiro (2-3-6 Akasaka, Minato-k, Tokyo 14, 〒1078414, JP)
Application Number:
JP2017/000818
Publication Date:
July 19, 2018
Filing Date:
January 12, 2017
Export Citation:
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Assignee:
KOMATSU LTD. (2-3-6, Akasaka Minato-k, Tokyo 14, 〒1078414, JP)
International Classes:
F15B20/00; F15B21/04
Domestic Patent References:
WO2002057662A12002-07-25
Foreign References:
JPH0526211A1993-02-02
JPH0914120A1997-01-14
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (Toranomon Mitsui Building, 8-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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