| 摘要 |
PURPOSE: A bimetallic cooling fan control device is provided to improve the performance of an engine by fastening an electromagnetic clutch and rotating a cooling fan just when necessary and by releasing the electromagnetic clutch and not rotating the cooling fan just when unnecessary. CONSTITUTION: In a bimetallic cooling fan, the cooling fan is rotated by the starting torque produced as an impeller, fastened to a water pump shaft in a bearing case to which oil is supplied through a slide valve opening and closing by a bimetallic thermostat, is rotated. A bimetallic cooling fan control device comprises an electromagnetic clutch(22) fastening or releasing the impeller and the water pump shaft; a switch(50) fastening the electromagnetic clutch by supplying power to the electromagnetic clutch or releasing the electromagnetic clutch by intercepting power; an engine rpm(revolutions per minute) sensor(32) sensing engine rpm; a coolant temperature sensor(34) sensing temperature of a coolant; a suction air temperature sensor(36) sensing temperature of suction air; and a controller(40) controlling the switch on the basis of values sensed by the sensors.
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