A system for controlling a hydraulic cooling fan for an engine as a _function of ambient and coolant temperatures
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United States of America Patent
Stats
-
Oct 30, 1984
Grant Date -
N/A
app pub date -
Dec 21, 1981
filing date -
Dec 25, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic actuator system for a cooling fan of an internal combustion engine comprising a first detector for detecting the temperature of the cooling water in a cooling system for the engine and a second detector for detecting the atmospheric temperature. An electrical control circuit generates a first control signal corresponding to the cooling water temperature detected by the first detector and a second control signal corresponding to the maximum number of revolutions of the cooling fan as a function of atmospheric temperature detected by the second detector and generates an electrical output signal corresponding to the difference between the first and second control signals. A proportional control valve is coupled to the control circuit and controlled by the output signal of the control curcuit, and a cooling fan driving device is coupled to the control valve, wherein the rotational speed of the fan driving device is controlled as a function of the flow rate of fluid controlled by the proportional control valve.
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