Internal-combustion engines – Cooling – Automatic coolant flow control
Reexamination Certificate
2011-04-12
2011-04-12
Kamen, Noah (Department: 3783)
Internal-combustion engines
Cooling
Automatic coolant flow control
C123S041490
Reexamination Certificate
active
07921816
ABSTRACT:
A control device for a hydraulically driven fan is provided with a cooling fan which is rotated by a hydraulic motor and carries out ventilation for cooling a working fluid. Further, the control device for the hydraulically driven fan is provided with a sensor for detecting a temperature of the working fluid, and a lever switch for detecting whether a working mechanism actuated by the engine is in a stopped state, by determining whether a working machine lever has been operated. In order that a resonance between the cooling fan and the engine is suppressed, the control device for the hydraulically driven fan further adjusts a rotating speed of the hydraulic motor in correspondence to a detection result by the lever switch. In the case that a stopped state of the working mechanism is detected on the basis of an operation state of the working machine lever by the lever switch, the rotating speed of the hydraulic motor is adjusted. Accordingly, it is possible to adjust and change the rotating speed of the cooling fan, thus it is possible to prevent resonance noise and vibration from being generated between the cooling fan and the engine.
REFERENCES:
patent: 4823744 (1989-04-01), Omura
patent: 6195989 (2001-03-01), Hall et al.
patent: 6349882 (2002-02-01), Kita et al.
patent: 6481388 (2002-11-01), Yamamoto
patent: 2003/0041727 (2003-03-01), Maruta et al.
patent: 2005/0254959 (2005-11-01), Furuta et al.
patent: 3812267 (1988-11-01), None
patent: 04-311620 (1992-11-01), None
patent: 11-107753 (1999-04-01), None
patent: 2000-110560 (2000-04-01), None
patent: 2001-182535 (2001-07-01), None
patent: 2001-193460 (2001-07-01), None
patent: 2005-083344 (2005-03-01), None
patent: 2005-146878 (2005-06-01), None
patent: 2005/024199 (2005-03-01), None
patent: PCT/JP2006/316824 (2006-10-01), None
Office Action dated Feb. 9, 2010 in related German Application No. 11 2006 002 204.0 with English translation.
German Office Action dated Oct. 1, 2010 for related German patent Application No. 112006002204.0-13.
Hoshi Kouji
Okuda Kozo
Yanagihara Keiji
Fox Rothschild LLP
Kamen Noah
Komatsu Ltd.
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