Method of controlling a variable speed fan

Details Method of controlling a variable speed fan Method of controlling a variable speed fan

F - Mech Eng,Light,Heat,Weapons

01

P

F01P 7/02 (2006.01) F01P 7/04 (2006.01)

Patent

CA 2436987

Various control strategies and techniques (28) for controlling a variable speed fan (18) in an internal combustion engine (12) are provided. The various control techniques improve fuel economy by operating the fan at a speed sufficient to cool the engine, while avoiding unnecessarily higher speeds that result in poor fuel economy. Further, the fan may be completely disabled at cold start up to avoid over cooling, particularly in an engine using a charge air cooling system.

L'invention concerne plusieurs stratégies et techniques de commande d'un ventilateur à vitesse variable dans un moteur à combustion interne. Ces diverses techniques de commande réduisent la consommation de carburant en activant le ventilateur à une vitesse suffisante pour refroidir le moteur, tout en évitant des vitesses inutilement élevées qui ne favorisent pas l'économie de carburant. En outre, en cas de démarrage à froid, le ventilateur peut être complètement désactivé afin d'éviter un surrefroidissement, notamment dans un moteur utilisant un système de refroidissement d'air comprimé d'admission.

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