Lubricating Oil Composition

a technology of lubricating oil and composition, which is applied in the direction of lubricant composition, liquid carbonaceous fuel, fuel, etc., can solve the problems of increasing fuel consumption, reducing the life of the filter, and raising the back pressure of the vehicle engine, so as to reduce the clogging of diesel particulates

Inactive Publication Date: 2007-06-07
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0031] It has been surprisingly found in the present invention that for a given sulphated ash content, the use of magnesium detergents in lubricating oil compositions give improved performance in diesel particulate filter tests, that is to say, reduced filter clogging, as compared to the use of calcium detergents therein.
[0033] Thus, the disadvantages associated with trying to achieve a balance of the basicity properties of a lubricating oil composition and reducing diesel particulate clogging in a diesel particulate filter may therefore be overcome by the use of magnesium detergents.

Problems solved by technology

Sulphated ash deposits can clog the diesel particulate filter (DPF) of vehicles, thereby reducing filter life, raising back pressure in the vehicle engine and causing increased fuel consumption.
However, reducing the amount of detergents present in a lubricating oil composition in order to reduce the sulphated ash content thereof can have an adverse effect on the basicity of the lubricating oil composition.
However, US 2004 / 0127371 A1 does not provide any teaching on how to reduce the adverse clogging effect of sulphated ash on the diesel particulate filter units without having to compromise on the basicity of the lubricating oil composition.

Method used

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  • Lubricating Oil Composition

Examples

Experimental program
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Formulations

[0108] Table 1 indicates the formulations that were tested.

[0109] The formulations in Table 1 comprised conventional antioxidants, anti-foams, dispersants, friction modifiers, seals fix additives, pour point depressants, viscosity index modifiers and zinc dithiophosphate additives.

[0110] The magnesium detergent used was that available under the trade designation “Infineum C9012” (TBN 345 mg.KOH / g) from Infineum.

[0111] The calcium detergents used were those available under the trade designations “Infineum M7101” (TBN 168 mg.KOH / g), “Infineum M7102” (TBN 64 mg.KOH / g) and “Infineum M7105” (TBN 280 mg.KOH / g) from Infineum.

[0112] The base oils used in said formulations were Group III base oils available from the Shell group under the trade designations “XHVI-5.2” and “XHVI-8.2”.

[0113] All formulations described in Table 1 were SAE 5W30 viscosity grade oils.

TABLE 1Comp.Comp.Additive (wt. %)Ex. 1Ex. 2Ex. 1Ex. 2Anti-foam30 ppm30 ppm30 ppm30 ppmCalcium salicylate1——0.801...

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Abstract

The use, in a lubricating oil composition comprising base oil, of one or more magnesium detergents, for the reduction of clogging in a diesel particulate filter.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a lubricating oil composition, in particular to a lubricating oil composition which is suitable for lubricating internal combustion engines. BACKGROUND OF THE INVENTION [0002] In view of the adverse affects that the sulphated ash, sulphur and phosphorus concentrations of lubricating oil compositions may have on vehicle exhaust after-treatment devices such as diesel particulate filters (DPF), there is a trend towards lubricating oil compositions having reduced sulphated ash, sulphur and / or phosphorus concentrations therein (i.e. so-called low-SAPS lubricating oil compositions). [0003] Phosphorus concentrations may be generally reduced by reducing the amount of zinc dithiophosphates which are present as anti-wear additives in lubricating oil compositions. [0004] Sulphur levels in lubricating oil compositions may be reduced by employing low sulphur level base oils and reducing the amount of sulphur-containing additives empl...

Claims

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Application Information

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IPC IPC(8): C10L1/14
CPCC10M159/20C10M159/22C10M159/24C10M167/00C10M2203/1006C10M2207/026C10M2207/028C10M2207/262C10M2215/28C10M2219/046C10M2223/045C10N2210/02C10N2230/04C10N2230/06C10N2230/08C10N2230/12C10N2230/18C10N2230/36C10N2230/42C10N2230/43C10N2230/45C10N2230/52C10N2240/10C10N2240/102C10N2240/103C10N2010/04C10N2030/04C10N2030/06C10N2030/08C10N2030/12C10N2030/18C10N2040/25C10N2030/36C10N2030/42C10N2030/43C10N2030/45C10N2030/52C10N2040/252C10N2040/253
Inventor BUSSE, PETERLEONHARDT, HELMUTSANT, PETERWILLARS, MALCOM J.
Owner SHELL OIL CO
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