F - Mech Eng,Light,Heat,Weapons – 01 – P
Patent
F - Mech Eng,Light,Heat,Weapons
01
P
F01P 5/02 (2006.01)
Patent
CA 2345942
The present invention pertains to vehicles and in particular, control of the axial fan adjacent the radiator that moves air therethrough to provide bi-directional fan operation. The forward blowing speed of the fan is made variable. When the engine is below its operating temperature and the vehicle is moving, the fan is switched to blow forwards and at a speed proportional to vehicle speed so as to block cold air from entering and blasting onto a cold engine. This speeds engine warm-up to reduce emissions, improve fuel economy, speed windshield defogging for improved visibility. When the engine is above its operating temperature and the vehicle is idling or moving slowly, as in traffic. The fan then again blows forwards cooling the radiator, the engine, and the plastic and electronic components of the engine bay and rejects hot, noxious fumes from traffic vehicles in front. Looping of hot radiator air is eliminated. A well understood motor control circuit design uses signals from engine temperature and road-speed sensors to determine and witch the fan motor's direction of rotation and its speed of rotation. When not blowing forward, the fan reverts to normal operation.
Mackelvie Winston R.
Na
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