System for controlling rotational speed of hydraulically driven cooling fan of internal combustion engine, responsive to engine coolant and also fan propellant temperature
November 4, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3664129 Fan drive system Hydraulic fan drive system Hydraulic fan drive system Apparatus for regulating the rotation of a hydraulically-operated cooling fan Hydraulic power steering and cooling fan drive system for vehicles Control means for engine cooling systems A system for controlling a hydraulic cooling fan for an engine as a _function of ambient and coolant temperatures Engine cooling system Fan drive, particularly for cooling installation of vehicles InventorsAssigneeApplicationNo. 07/116340 filed on 11/04/1987US Classes:123/41.12, Temperature-responsive123/41.02Automatic coolant flow controlExaminersPrimary: Nelli, Raymond A.Attorney, Agent or FirmInternational ClassesF01P 7/04 (20060101)F01P 7/00 (20060101) Foreign Application Priority Data1986-11-12 JPAbstractA cooling fan for an internal combustion engine hydraulically driven by a flow of propellant hydraulic fluid is controlled of its rotational speed by a system which includes a device for sensing a value representing the operating temperature of the engine, a device for sensing the operating temperature of the propellant hydraulic fluid, and a device for controlling the flow of the propellant hydraulic fluid, so as to increase the flow rate of the propellant hydraulic fluid when the operating temperature of the engine increases and also when the operating temperature of the propellant hydraulic fluid increases. | |
