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Engine flush process and composition

Inactive Publication Date: 2006-06-01
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials can be volatile or flammable or both, as well as difficult to store and dispose of.
Conventional solvent based flush systems, moreover, typically do nothing to recondition the surfaces of a cleaned engine.

Method used

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  • Engine flush process and composition
  • Engine flush process and composition
  • Engine flush process and composition

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] A composition is prepared in a mixture of base oils (50% 400 N naphthenic oil and 50% 100 N API Group I oil), having a viscosity at 100° C. of 2.14 mm2 / s and 22% aromatic content, 5% of a succinimide dispersant, 1% of a hindered phenolic ester antioxidant, 1.4% overbased calcium and sodium sulfonate detergents, 1.4% zinc dialkyldithiophosphate, 0.4% trialkyl (relatively short chain) borate ester, 0.3% sulfurized olefin antioxidant, 0.1% alkyl sulfone and 10 ppm antifoam agent, all numbers on a diluent oil-free basis.

[0066] A 3.8 L six-cylinder gasoline engine is evaluated for high temperature poston deposits by the protocol set forth in ASTM Sequence IIIG Test Procedure Draft 2D prior to the flushing and cleaning of the present invention. Each piston is evaluated at the undercrown, second land, third land, piston skirt, 1st groove, 2nd groove, and 3rd groove positions. The weighted piston deposit result is determined by multiplying each rated area by the following weighting ...

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Abstract

An internal combustion engine can be cleaned of sludge, deposits, or wear debris, by supplying to lubricated surfaces of said engine a composition having a kinematic viscosity of 1 to 10 mm2 / s at 100° C. comprising oil having at least 15% aromatics by ASTM D-2007; at least 2.5 weight percent of a nitrogen-containing dispersant; at least 0.6 weight percent of an overbased metal detergent; and at least about 0.5 weight percent of a metal salt of a phosphorus acid, circulating the composition through the engine and removing the composition from the engine.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a composition and process suitable for flushing an internal combustion engine to remove sludge, deposits, or wear from lubricated surfaces of the engine. [0002] There is a need to develop an engine flush lubricant to clean older engines, typically those with greater than 120,000 km (75,000 mi.) on the odometer. Among the devices known to be used for supplying cleaning fluids to engines are those described in U.S. Pat. No. 5,460,656, among others. There are, indeed, numerous engine cleaning or flushing compositions available for use, many of which may contain kerosene, mineral spirits, or other solvents. It is believed that typical engine flush oils may sometimes contain 60-98% kerosene (also known as Fuel Oil No. 1) or diesel fuel No. 2; 1-15% solvents or light base stocks such as ethylene glycol monobutyl ether, 2-ethyoxyethanol, solvent dewaxed heavy paraffinic petroleum distillates (the foregoing may sometimes be...

Claims

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Application Information

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IPC IPC(8): C10M141/06C10M141/10
CPCC10M169/04C10M169/045C10M171/02C10M2203/1006C10M2203/1045C10M2203/1065C10M2207/026C10M2207/281C10M2215/28C10M2219/022C10M2219/04C10M2219/046C10M2223/045C10M2227/061C10N2210/01C10N2210/02C10N2230/02C10N2230/04C10N2240/10C10N2010/02C10N2030/04C10N2030/02C10N2010/04C10N2040/25
Inventor BASAR, PAUL D.GOODLIVE, STEVEN A.TARACHA, JOHN W.ABRAHAM, WILLIAM D.
Owner THE LUBRIZOL CORP
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