CONTROL DEVICE FOR CONSTRUCTION MACHINE COOLING FAN

Title:

CONTROL DEVICE FOR CONSTRUCTION MACHINE COOLING FAN

Document Type and Number:

WIPO Patent Application WO/2015/133012

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide a control device for a construction machine cooling fan with which the effect of heat from a warmup operation can be reduced. A control device for a construction machine according to the present invention is equipped with a control unit (10a) that controls the rotational frequency of a cooling fan (21) in accordance with the main pump discharge pressure (P) detected by a main pump discharge pressure sensor (25), the engine cooling water temperature (Tw) detected by an engine cooling water temperature sensor (26), the operating oil temperature (To) detected by an operating oil temperature sensor (27), and the engine rotational frequency (E) detected by an engine rotational frequency sensor (28). By rotating the cooling fan (21) with a rotational frequency controlled by this control unit (10), the cooling breeze that is generated is transmitted to an oil cooler (19) and a control valve (13).

Inventors:

KANEHAMA MITSUHIKO (JP)
SATO KENSUKE (JP)
NAKAMURA TSUYOSHI (JP)

Application Number:

PCT/JP2014/080358

Publication Date:

September 11, 2015

Filing Date:

November 17, 2014

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACHINERY (JP)

International Classes:

F01P7/04; E02F9/00; F01P5/04; F01P5/06; F01P11/08; F01P11/14

Domestic Patent References:

WO2006112091A1

2006-10-26

Foreign References:

JP4285866B2	2009-06-24
JP2006322268A	2006-11-30
JP2000303838A	2000-10-31
JPH11241369A	1999-09-07
JPH05171934A	1993-07-09

Other References: