Traction fluid formulation
AssigneeThe Lubrizol Corporation
InventorCraig D. Tipton
Life of this patent
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Abstract
A traction fluid useful in automotive power transmitting equipment includes a base fluid of polymers of at least one olefin which contains 3 to 5 carbon atoms, hydrocarbon molecules containing non-aromatic cyclic moieties, or mixtures thereof; a low-temperature viscosity control agent selected from the group consisting of oligomers or polymers of linear alpha olefins of at least 8 carbon atoms, naphthenic oils, synthetic ester oils, polyether oils, and mixtures thereof, in an amount sufficient to reduce the low temperature viscosity of the traction fluid; and an additive package including dispersants, detergents, or mixtures thereof, along with other optional additive components.
Claims37
A traction fluid useful in automotive power transmitting equipment, comprising:
- (a) a major amount of a base fluid comprising a predominantly linear hydrogenated dimer of alpha-alkylstyrene;
- (b) a low-temperature viscosity control agent selected from the group consisting of oligomers or polymers of linear alpha olefins of at least 8 carbon atoms, naphthenic oils, synthetic ester oils, polyether oils, and mixtures thereof, in an amount sufficient to reduce the viscosity at −40° C. of said traction fluid;
- and
- (c) an additive selected from the group consisting of dispersants, detergents, and mixtures thereof, in an amount sufficient to improve the clutch friction durability performance of said traction fluid.
Dependencies are inferred from the claim text.