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US 2020/0232476 A1Published application
Variable pitch fan pitch limit
AssigneeDeere & Company
InventorShaun J. Miller
Life of this patent
Estimating the term…
Abstract
A fan assembly that has a fan hub having a plurality of blades extending radially therefrom and having a variable pitch and a controller in communication with the fan assembly to reposition a pitch of the plurality of blades. The controller establishes a variable maximum pitch of the plurality of blades based on an ambient temperature.
Claims20
A fan assembly, comprising:
- a fan hub having a plurality of blades extending radially therefrom and having a variable pitch;
- and
- a controller in communication with the fan assembly to reposition a pitch of the plurality of blades;
- wherein, the controller establishes a variable maximum pitch of the plurality of blades based on an ambient temperature.
1 more element
A method for controlling the pitch of a variable pitch fan assembly, comprising:
- providing a fan hub, a plurality of blades extending radially from the fan hub, and a controller;
- identifying, with the controller, a maximum pitch of the plurality of blades based on an ambient factor;
- adjusting a pitch angle of the plurality of blades, with the controller, to a desired pitch that is at or between a minimum pitch and the maximum pitch.
A work machine, comprising:
- an engine;
- a vehicle system;
- a fan assembly having blades that have a pitch angle that is repositionable;
- and
- a controller in communication with the fan assembly and the vehicle system to reposition the pitch angle of the blades;
- wherein, the controller establishes a variable maximum pitch of the plurality of blades based on an ambient factor.
3 more elements
Dependencies are inferred from the claim text.