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Method of Lubricating an Aluminum Silicate Composite Surface with a Lubricant Comprising Ashless, Sulphur, Phosphorous Free Antiwear Agent

a technology of aluminum silicate and composite surface, which is applied in the direction of additives, base materials, organic chemistry, etc., can solve the problems of reduced catalyst performance, increased wear, and poor engine wear performance of aluminium-alloy based engines compared with ferric based engines

Inactive Publication Date: 2010-07-29
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]In one embodiment the invention provides a lubricating composition comprising an ashless, phosphorus-free, sulphur-free antiwear agent, and wherein the lubricating composition is characterised as having at least one of (i) a sulphur content of 0.8 wt % or less, (ii) a phosphorus content of 0.2 wt % or less, or (iii) a sulphated ash content of 2 wt ...

Problems solved by technology

In addition, sulphur and phosphorus tend to poison the catalysts used in catalytic converters, resulting in a reduction in performance of said catalysts.
However, well known antiwear agents ZDDP, are believed to result in poorer engine wear performance in aluminium-alloy based engine compared with ferric based engines.
However, reducing the levels of antiwear additives such as ZDDP, is likely to increase wear and result in other detrimental performance of an engine.

Method used

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  • Method of Lubricating an Aluminum Silicate Composite Surface with a Lubricant Comprising Ashless, Sulphur, Phosphorous Free Antiwear Agent

Examples

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example 1

[0103]A lubricating composition is prepared containing 1 wt % of di-2-ethylhexyl tartrate, 0.6 wt % of other antiwear agents, 7.9 wt % of dispersants, 1.5 wt % of detergents, 3.6 wt % of antioxidants, 6.1 wt % of viscosity modifier, 0.1 wt % of corrosion inhibitor, and 0.1 wt % of friction modifier. The lubricating composition has a sulphated ash content of 0.6 wt %, a phosphorus content of about 570 ppm, and a sulphur content of 0.17 wt %.

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Abstract

The present invention relates to a method of lubricating an aluminium-composite surface by supplying to the aluminium composite surface (typically an internal combustion engine aluminium surface) a lubricating composition comprising an oil of lubricating viscosity and an ashless antiwear agent.

Description

FIELD OF INVENTION[0001]The invention provides a method of lubricating an aluminium-alloy or aluminium composite surface by supplying to the surface a lubricating composition comprising an oil of lubricating viscosity and an ashless antiwear agent. The invention further provides a lubricating composition suitable for lubricating the aluminium-alloy or aluminium composite surface.BACKGROUND OF THE INVENTION[0002]It is well known for lubricating oils to contain a number of additives used to protect the mechanical devices such as internal combustion engines from wear, soot deposits and acidity build up. A common antiwear additive for engine lubricating oils is zinc dialkyldithiophosphate (ZDDP). It is believed that ZDDP antiwear additives protect the engine by forming a protective film on metal surfaces.[0003]In recent years engine lubricants containing phosphorus compounds and sulphur have been shown to contribute in part to particulate emissions, and emissions of other pollutants. In...

Claims

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Application Information

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IPC IPC(8): C10M133/46C10M169/04C10M129/72C10M133/16C10M133/44C10M129/66C10M137/08C10M137/10
CPCC10M141/08C10M141/10C10N2240/10C10N2230/45C10N2230/43C10M2207/028C10M2207/042C10M2207/24C10M2207/262C10M2207/281C10M2207/282C10M2207/288C10M2207/289C10M2215/08C10M2215/082C10M2215/086C10M2215/12C10M2215/223C10M2215/224C10M2215/28C10M2219/046C10M2219/068C10M2219/089C10M2223/043C10M2223/045C10M2227/066C10N2230/06C10N2230/42C10N2210/06C10N2030/06C10N2030/42C10N2030/43C10N2030/45C10N2040/25C10N2010/12
Inventor DAVIES, MARKMCATEE, RODNEY J.
Owner THE LUBRIZOL CORP
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