Cooling fan controlling apparatus

Details Cooling fan controlling apparatus Cooling fan controlling apparatus

1990-05-17

1991-05-28

Kamen, Noah P.

Internal-combustion engines

Cooling

Automatic coolant flow control

F01P 702

Patent

active

050184849

ABSTRACT:
An apparatus for controlling an electric cooling fan of an automotive vehicle with an engine, having a radiator facing the electric cooling fan for cooling the engine coolant, comprising a device for generating an engine start signal, a coolant temperature sensor for sensing the engine coolant temperature, a judgement device responsive to the engine start signal for comparing the coolant temperature with a preset temperature, and generating a first judgement signal when the coolant temperature is lower than the preset temperature, a cooling fan control temperature setting device responsive to the first judgement signal for setting a cooling fan control temperature in accordance with the coolant temperature, the cooling fan control temperature being set higher with lower coolant temperature at the engine start, a temperature judging device for comparing the cooling fan control temperature with the coolant temperature after engine start and for outputting a second judgement signal, and a device responsive to the second judgement signal for driving the cooling fan.

REFERENCES:
patent: 4425766 (1984-07-01), Claypole
patent: 4590772 (1986-05-01), Nose et al.
patent: 4590892 (1986-05-01), Nose et al.
patent: 4651922 (1987-03-01), Noba

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