Patent ID: 9574157
Date: 2017-02-21
CPC Classifications: C10M,C10N

Claim:
1. A lubricating oil composition, consisting essentially of: a component (A) being a primary amine having a carbon chain moiety in a linear structure, wherein the linear structure is selected from the group consisting of a hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, heneicosyl group, docosyl group, and oleyl group, and wherein an amount of the component (A) is from 0.001 to 0.1% by mass based on a total mass of the lubricating oil composition in terms of nitrogen derived from the component (A); a component (B) being a tertiary amine represented by the formula (3): wherein R 5 is a hydrocarbon group having from 16 to 22 carbon atoms; and R 6 and R 7 are each independently a hydrocarbon group having 1 or 2 carbon atoms, wherein an amount of the component (B) is from 0.005 to 0.1% by mass based on the total mass of the lubricating oil composition in terms of nitrogen derived from the component (B); a component (C) being at least one of calcium sulfonate, calcium phenate, and calcium salicylate, wherein an amount of the component (C) is from 0.01 to 0.1% by mass based on the total mass of the lubricating oil composition in terms of calcium derived from the component (C); a component (D) being at least one of an acid phosphate and an acid phosphite, wherein an amount of the component (D) is from 0.02 to 0.09% by mass based on the total mass of the lubricating oil composition in terms of phosphorus derived from the component (D); optionally at least one additive selected from the group consisting of a viscosity index improver, a pour point depressant, an antiwear agent, a friction modifier, an ashless dispersant, a rust inhibitor, a metal deactivator, an antifoaming agent, and an antioxidant, wherein the at least one additive is present in an amount that does not hamper the clutch shudder prevention properties of the composition; and a base oil in a balance amount.