Magnetorheological fluids
AssigneeGeneral Motors Corporation
InventorsMark A. Golden, John C. Ulicny, Keith S. Snavely, Anthony L. Smith
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Abstract
One embodiment of the invention includes an MR fluid of improved durability. The MR fluid is particularly useful in devices that subject the fluid to substantial centrifugal forces, such as large fan clutches. A particular embodiment includes a magnetorheological fluid including 10 to 14 wt % of a hydrocarbon-based liquid, 86 to 90 wt % of bimodal magnetizable particles, and 0.05 to 0.5 wt % fumed silica.
Claims13
A magnetorheological fluid comprising:
- 10 to 14 weight percent of a hydrocarbon-based liquid;
- 86 to 90 weight percent of bimodal magnetizable particles;
- and
- 0.05 to 0.5 weight percent fumed silica.
A magnetorheological fluid comprising:
- 10 to 14 weight percent of a liquid phase comprising a polyalphaolefin;
- 86 to 90 weight percent of magnetizable particles;
- and
- 0.05 to 0.5 weight percent fumed silica.
A magnetorheological fluid comprising a liquid phase including a polyalphaolefin, magnetizable particles and 0.05 to 0.5 weight percent fumed silica.
Dependencies are inferred from the claim text.