Variable pitch fan drive system

A fan drive arrangement and method is provided for facilitating the cooling of engine coolant flowing through a radiator and an engine. The fan drive arrangement includes a variable pitch sheave assembly which moves between a first high speed position and a second low speed position. Variable pitch...

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Bibliographische Detailangaben
Hauptverfasser:	RUEHLOW GERALD C, GILLETTE ALLEN, KERN ROBERT D, BAIRD BRET
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONVERSION OR DISTRIBUTION OF ELECTRIC POWER COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL DYNAMO-ELECTRIC MACHINES ELECTRICITY ENGINE PLANTS IN GENERAL GENERATION HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A fan drive arrangement and method is provided for facilitating the cooling of engine coolant flowing through a radiator and an engine. The fan drive arrangement includes a variable pitch sheave assembly which moves between a first high speed position and a second low speed position. Variable pitch sheave assembly is interconnected by first and second drive belts to first and second drive pulleys operatively connected to the crankshaft of the engine and by first and second fan belts to corresponding fan pulleys connected to a fan shaft of a fan. Variable pitch sheave assembly includes first and second drive belt receiving grooves for receiving corresponding drive belts therein and first and second fan belt grooves for receiving corresponding fan belts therein. The depths of the fan belt grooves and the drive belt grooves of the variable pitch sheave assembly are varied in response to the temperature of the engine coolant flowing through the radiator so as to vary the fan speed accordingly.