THERMOSTATTED HYDRAULIC FAN CLUTCH

摘要

A fan for cooling an engine is adjusted in function of the engine speed. The fan has a hydraulic clutch in which a sliding adjustment is made in function of the temperature of the engine coolant. The drive shaft of the hydraulic clutch is designed as a hollow shaft in which the coolant circulates. The hollow shaft also contains a thermostat which actuates the tappet of a valve in the hydraulic clutch to regulate the flow. The valve is preferably designed as a disk valve in contact with the return openings of the hydraulic clutch. In order to cool the hydraulic clutch, the pump wheel is designed as a hollow body which communicates with the liquid circulating in the hollow shaft.