System and method for controlling fan activation based on...

Internal-combustion engines – Cooling – Automatic coolant flow control

Reexamination Certificate

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Reexamination Certificate

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06880497

ABSTRACT:
A method for controlling at least one engine cooling fan for a compression ignition internal combustion engine, the method includes turning on the at least one cooling fan when an intake manifold air temperature is equal to or greater than a predetermined turn-on threshold temperature for a predetermined turn-on time, and turning off the at least one cooling fan when the intake manifold air temperature is equal to or less than a predetermined turn-off threshold temperature for a predetermined turn-off time, wherein the predetermined turn-on threshold temperature is greater than the predetermined turn-off threshold temperature.

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patent: 6571751 (2003-06-01), Vogt
Fan Controllers, Axiomatic Technologies Corp., http://www.axiomatic.com/fan-control.html.

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