Oil composition and its use in a transmission

Abstract

This invention relates to a lubricating composition containing (a) an oil soluble phosphorus amine salt; (b) about 0.0001 wt % to about 0.5 wt % of a metal containing detergent package comprising a phenate and a sulphonate; (c) a dispersant; (d) a dispersant viscosity modifier; (e) a metal deactivator; and (f) an oil of lubricating viscosity, wherein the lubricating composition contains less than about 0.25 wt % of a metal dialkyldithiophosphate. The invention further relates to a method of lubricating a transmission by employing the lubricating composition.

Description

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AI Technical Summary

Benefits of technology

The invention relates to a lubricant that has very low amounts of certain chemicals called metal dialkyldithiophosphate (less than 0.25% by weight). This change can improve performance and reduce emissions from engines running on these fuels.

Problems solved by technology

The technical problem addressed by this patent is the development of a lubricating composition that can provide effective protection against wear, scuffing, and micropitting while maintaining good compatibility with hydraulic components, stable operation over time, and low levels of contamination. This is necessary because traditional lubricants cannot effectively protect against these issues when used in high-powered gear and transmission systems.