Electrical fan system for vehicle

Refrigeration – Automatic control – Of external fluid or means

Reexamination Certificate

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Details

C181S183000, C181S184000

Reexamination Certificate

active

06986260

ABSTRACT:
An electric fan system has a first electric blower10,which utilizes a brushless motor, and a second electric blower, which utilizes a brushed motor, for distributing the cooling air to the radiator and the condenser. The system has an electronic engine control unit which activates only the first electric blower when it determines that the cooling water temperature is less than T2,and activates both the first and second electric blowers when it determines that the cooling water temperature is T2or higher. The water temperature is based on a detection output from a cooling water temperature sensor. Thus, since the electric blower is not activated unless the cooling water temperature becomes T2or higher, use of the brushed motor is limited and its life is increased.

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European Search Report dated Aug. 19, 2004 in corresponding European Application No.04 01 6094.

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