Lubricant composition and continuously variable transmission

摘要

Provided is a lubricating oil composition containing a base oil which includes a mineral oil and/or a synthetic oil, and compounded therein, (A) at least one phosphorus-containing compound selected from phosphoric acid monoesters, phosphoric acid diesters and phosphorous acid monoesters, each having a C1 to C8 hydrocarbon group or groups and (B) a tertiary amine compound having C6 to C10 hydrocarbon groups as substituents thereof. The lubricating oil composition provides both a high metal to metal friction coefficient and an excellent wear resistance and is suitably used in a continuously variable transmission.

主权项

1. A lubricating oil composition comprising a base oil which comprises a mineral oil and/or a synthetic oil, and, compounded therein,
(A) at least one phosphorus-containing compound selected from the group consisting of mono-n-butyl acid phosphate, mono-2-ethylhexylacid phosphite, and mono-2-ethylhexyl acid phosphate, and (B) at least one tertiary amine compound selected from the group consisting of tri-n-hexylamine and tri-n-decylamine, wherein a phosphorus content of the phosphorus-containing compound of component (A) is 0.02%-0.12% by mass based on the total mass of the lubricating oil composition; a nitrogen content of the tertiary amine compound of component (B) is 0.005%-0.04% by mass based on the total mass of the lubricating oil composition, and a mass ratio of said phosphorus content of the phosphorus-containing compound of component (A) to said nitrogen content of the tertiary amine compound of component (B) is 3:1 to 4:1.