Lubricating compositions for friction material interfaces
AssigneeChevron Oronite Company LLC
InventorsKarine Lantuejoul, Kenneth L. McLeod, Paul F. Vartanian
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Abstract
A certain combination of an oil-soluble fatty acid ester of a polyhydric alcohol and an oil-soluble fatty acid amide act as appropriate friction-modifying agents, which when added to a lubricating oil, exhibit good brake anti-chatter characteristics.
Claims12
A lubricating oil composition comprising:
- a) a major amount of at least one base oil of lubricating viscosity, and
- b) at least one mixture of additive components comprising:
- (i) from about 0.05 to about 2.0 wt % of one or more oil-soluble fatty acid eaters of a polyhydric alcohol, and
- (ii) from about 0.05 to about 2.0 wt % of one or more oil-soluble fatty acid amides having the following formula:
- R—C(O)—NH2,
- wherein R may be a saturated or unsaturated hydrocarbyl group containing at least about 8 carbon atoms per molecule and wherein the ratio of the oil-soluble fatty acid ester of a polyhydric alcohol to the oil-soluble fatty acid amide is from about 4:1 to about 1:2.
A method of making a lubricating oil composition comprising blending together a major amount of at least one base oil of lubricating viscosity, and at least one mixture of additive components comprising:
- a) from about 0.05 to about 2.0 wt % of one or more oil-soluble fatty acid esters of a polyhydric alcohol, and
- b) from about 0.05 to about 2.0 wt % of one or more oil-soluble fatty acid amides, having the following formula:
- R—C(O)—NH2,
- wherein R may be a saturated or unsaturated hydrocarbyl group containing at least about 8 carbon atoms per molecule and wherein the ratio of the oil-soluble fatty acid ester of a polyhydric alcohol to the oil-soluble fatty acid amide is from about 4:1 to about 1:2, at a temperature sufficient to result in the combination of the components.
A method of reducing brake chatter by lubricating the contacting surfaces of brakes with a lubricating oil composition comprising:
- a) a major amount of at least one base oil of lubricating viscosity, and
- b) at least one mixture of additive components comprising:
- (i) from about 0.05 to about 2.0 wt % of one or more oil-soluble fatty acid esters of a polyhydric alcohol, and
- (ii) from about 0.05 to about 2.0 wt % of one or more oil-soluble fatty acid amides having the following formula:
- R—C(O)—NH2,
- wherein R may be a saturated or unsaturated hydrocarbyl group containing at least about 8 carbon atoms per molecule and wherein the ratio of the oil-soluble fatty acid ester of a polyhydric alcohol to the oil-soluble fatty acid amide is from about 4:1 to about 1:2.
Dependencies are inferred from the claim text.