Oil composition and its use in a transmission

a technology of oil composition and transmission, applied in the field of lubricating composition, can solve the problems that the lubricant of gear and transmission is not capable of providing adequate protection

Inactive Publication Date: 2006-12-07
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0117] A lubricating composition is prepared by blending into an oil of lubricating viscosity about 1.3 wt % of a oil soluble phosphorus amine salt; about 1.5 wt % of a detergent package containing a phenate and a sulphonate detergent; about 0.004 wt % of at least one metal deactivator; about 20 wt % of a dispersant viscosity modifier; and about 0.8 wt % of a dispersant. The lubricating composition has a Kinematic Viscosity (at 100° C. as determined by ASTM method D2270) of about 18 mm2 / s (or cSt); and a Viscosity at 40° C. (as determined by D2270) of 130.5 mm2 / s.

[0118] Reference Example 1 is a commercially available manual transmission fluid.

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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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Claims

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Application Information

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Owner THE LUBRIZOL CORP
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