F - Mech Eng,Light,Heat,Weapons – 01 – P
Patent
F - Mech Eng,Light,Heat,Weapons
01
P
F01P 5/04 (2006.01) F01P 7/04 (2006.01)
Patent
CA 2342114
A method is described for controlling a variable speed fan drive for a cooling fan of a vehicle. The method comprises the steps of: determining the total cooling capacity requirements of the component systems; if the total cooling requirement is greater than zero, determining the amount of air flow through the cooling device to meet the total cooling capacity requirement in a first predefined time period; determining the optimum fan rotary speed necessary to achieve the amount of air flow determined in the previous step while considering the fan moment of inertia to minimize the fan acceleration torque load; setting the fan rotary speed at the speed determined in the previous step and controlling the acceleration of the fan speed as determined in the previous step; and waiting the first predefined time period and repeating the above steps.
Borden Ladner Gervais Llp
Deere & Company
LandOfFree
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