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US 4,537,158 AGranted
Apparatus for cooling an internal combustion engine
AssigneeBehr-Thomson Degnstoffregler GmbH
InventorRoland Saur
Life of this patent
Estimating the term…
Abstract
Apparatus for cooling an internal combustion engine of a motor vehicle is provided having a thermostatic valve for controlling the coolant flow and having at least one fan associated with the radiator. The fan (or fans) can be operated in several output stages and the thermostatic valve can be adjusted to at least two different opening temperatures. When the thermostatic valve is adjusted to a higher opening temperature, operation of the fan in the output stage associated with a lower coolant temperature is blocked.
Claims6
Apparatus for cooling an internal combustion engine, comprising:
- a thermostatic valve having a closed position for directing a coolant flow to the engine via a direct return, and having an open position for directing the coolant flow to the engine via a radiator when said coolant flow reaches a temperature in excess of an opening temperature of the thermostatic valve;
- means for adjusting said opening temperature of the thermostatic valve to at least two different temperature operating levels;
- at least one fan associated with said radiator and being operable in at least a lower and a higher output stage in correspondence with at least a lower and a higher engine coolant temperature, respectively;
- and
- switching means, responsive to said means for adjusting the opening temperature of the thermostatic valve, have been for blocking the operation of the lower output stage of said fan when the opening temperature of the thermostatic valve is adjusted to a higher of said at least two different temperature operating levels.
2 more elements
Dependencies are inferred from the claim text.