FAN CONTROL SYSTEM WITH ELECTRO-HYDRAULIC VALVE PROVIDING THREE FAN MOTOR OPERATIONAL POSITIONS

The invention provides a fan control system (25) including a tank (30), a pump (32), a hydraulic motor (34), a fan (15), and a control valve (40, 140). The control valve (40, 140) is adapted to selectively direct a flow of hydraulic fluid from the pump (32) through the control valve (40, 140) into a...

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Bibliographische Detailangaben
Hauptverfasser:	HOPF DARREN J, HAND TIMOTHY L, REEVER JUSTIAN D
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL DEVICES FOR VENTING OR AERATING ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	The invention provides a fan control system (25) including a tank (30), a pump (32), a hydraulic motor (34), a fan (15), and a control valve (40, 140). The control valve (40, 140) is adapted to selectively direct a flow of hydraulic fluid from the pump (32) through the control valve (40, 140) into a pressure control chamber (81) of the hydraulic motor (34) or from the pressure control chamber (81)to the tank (30) to vary the control pressure therein to move the hydraulic motor's swashplate (85) between forward and reverse positions. The control valve (40, 140) is adapted to selectively directhydraulic fluid from the pump (32) into the pressure control chamber (81) such that the control pressure therein is pressurized to an idle pressure to move the swashplate (85) to an intermediate position between the forward and reverse positions such that the output shaft (75) rotates at an idle rate which is less than the rotational speed of the output shaft (75) when in the forward mode. 本发明公开了一种风扇控制系统(25)，包括罐(30)、泵(32)