Method and electronic device for controlling engine fan

Details Method and electronic device for controlling engine fan Method and electronic device for controlling engine fan

1992-10-28

1994-05-03

Tanner, Harry B.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62183, 123 4112, 236 35, B60H 304

Patent

active

053076443

ABSTRACT:
An electronic engine fan control device is disclosed. The control device includes means for detecting engine coolant temperature, operation of the vehicle air conditioning load, and vehicle road speed. The control device also includes means for generating first and second temperature signals in response to engine coolant temperature. The control device further includes override signal generating means for generating first and second override signal under certain temperature, or certain load and speed conditions. The control device finally includes means for comparing the first and second temperature signals and the first and second override signals for generating a control signal to operate the vehicle fan. A method for controlling an engine fan is also disclosed including the steps of detecting engine coolant temperature, air conditioning load and road speed and generating corresponding signals. The method further includes the steps of comparing the temperature, load and speed signals to preselected values and generating a control signal to operate the engine fan.

REFERENCES:
patent: 4425766 (1984-01-01), Claypole
patent: 4546742 (1985-10-01), Sturges
patent: 4651922 (1987-03-01), Noba
patent: 4779577 (1988-10-01), Ritter et al.
patent: 4804139 (1989-02-01), Bier
patent: 4848100 (1989-07-01), Barthel et al.
patent: 4930320 (1990-06-01), Ide et al.
patent: 5018484 (1991-05-01), Naitoh
patent: 5144916 (1992-09-01), Yoshida et al.

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