Apparatus for controlling an electric motor for driving a coolin

Details Apparatus for controlling an electric motor for driving a coolin Apparatus for controlling an electric motor for driving a coolin

1977-09-09

1979-09-18

Truhe, J. V.

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

318447, 318473, 307 10R, 307117, 123 4112, H02P 300

Patent

active

041684567

ABSTRACT:
Disclosed is an apparatus for controlling an electric motor for driving a cooling fan of an internal combustion engine. The apparatus comprises an engine operation detecting means, a timer, an engine temperature detecting means, a logical product generating means, and a motor controlling means. The electric motor is driven only when all of the following three conditions are satisfied: the engine is not operating; a predetermined timing period initiated when the engine stops operating has not expired; and a temperature in the engine room is higher than a predetermined value.

REFERENCES:
patent: 3794896 (1974-02-01), Holt
patent: 3823363 (1974-07-01), Hill
patent: 3942024 (1976-03-01), Ingham
patent: 3964444 (1976-06-01), Hemmann et al.
patent: 3982163 (1976-09-01), Hill
patent: 4129812 (1978-12-01), Shigenobu et al.

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