Lubricating oil composition for hybrid vehicles
AssigneeChevron Japan Ltd.
InventorsHisanari ONOUCHI, Isao TANAKA, Taiki HATTORI
Life of this patent
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Abstract
The lubricating oil composition includes an oil of lubricating viscosity, one or more compounds containing a carboxylic acid functional group or ester functional group the compound represented by each R1, R2, R3, R4, R5, and R6 is independently hydrogen or hydrocarbyl group; at least one of R1, R2, R3, and R4 is a hydrocarbyl group; and a poly alkylene glycol represented by each R7, R8, and R9 is independently hydrogen or hydrocarbyl group and n is from 5 to 1000.
Claims23
An internal combustion engine lubricating oil composition comprising:
- an oil of lubricating viscosity;
- one or more additive compounds comprising carboxylic acid functional group or ester functional group, wherein the one or more additive compounds is represented by
- wherein each R1, R2, R3, R4, R5, and R6 is independently hydrogen or hydrocarbyl group;
- wherein at least one of R1, R2, R3, and R4 is a hydrocarbyl group;
- and
- a poly alkylene glycol represented by
- wherein each R7, R8, and R9 is independently hydrogen or hydrocarbyl radical group and wherein n is from 5 to 1000.
A method of improving performance of an engine, the method comprising:
- lubricating the engine with a lubricating oil composition comprising:
- an oil of lubricating viscosity;
- one or more additive compounds comprising carboxylic acid functional group or ester functional group, wherein the one or more additive compounds is represented by
- wherein each R1, R2, R3, R4, R5, and R6 is independently hydrogen or hydrocarbyl group;
- wherein at least one of R1, R2, R3, and R4 is a hydrocarbyl group;
- and
- a poly alkylene glycol represented by
- wherein each R7, R8, and R9 is independently hydrogen or hydrocarbyl group and wherein n is from 5 to 1000.
A method of improving rust performance of an engine in a hybrid vehicle, wherein the method comprises:
- lubricating the engine with a lubricating oil composition comprising:
- an oil of lubricating viscosity;
- one or more additive compounds comprising carboxylic acid functional group or ester functional group, wherein the one or more additive compounds is represented by
- wherein each R1, R2, R3, R4, R5, and R6 is independently hydrogen or hydrocarbyl group;
- wherein at least one of R1, R2, R3, and R4 is a hydrocarbyl group;
- and
- a poly alkylene glycol represented by
- wherein each R7, R8, and R9 is independently hydrogen or hydrocarbyl group and wherein n is from 5 to 1000.
Dependencies are inferred from the claim text.