A system for controlling a hydraulic cooling fan for an engine a

Details A system for controlling a hydraulic cooling fan for an engine a A system for controlling a hydraulic cooling fan for an engine a

1981-12-21

1984-10-30

Richter, Sheldon J.

Heat exchange

Movable heating or cooling surface

Rotary drum

123 4112, 123 4149, 165 40, F28F 2700

Patent

active

044795327

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.

REFERENCES:
patent: 3893555 (1975-07-01), Elmer
patent: 4062329 (1977-12-01), Rio
patent: 4200146 (1980-04-01), Olson
patent: 4203712 (1980-05-01), Uehara
patent: 4302156 (1981-11-01), LaFlame
patent: 4313402 (1982-02-01), Lehnhoff et al.
patent: 4348990 (1982-09-01), Nolte et al.

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