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Lubricant composition for bio-diesel fuel engine applications

A technology of lubricating oil composition and biodiesel, which is applied in the direction of lubricating composition, petroleum industry, additives, etc., and can solve the problems of increased use of biodiesel fuel and increased treatment rate

Inactive Publication Date: 2009-08-05
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increases in standard dispersant treat rates in lubricating oils may not be sufficient to address issues arising from increased use of biodiesel fuel in engines

Method used

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  • Lubricant composition for bio-diesel fuel engine applications
  • Lubricant composition for bio-diesel fuel engine applications
  • Lubricant composition for bio-diesel fuel engine applications

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Embodiment Construction

[0010] As described in more detail below, lubricating oils for diesel engines operating on fuels containing biodiesel components can be synergistically improved by the addition of specific highly grafted multifunctional olefin copolymers. More specifically, a highly grafted olefin copolymer as a dispersant / viscosity index improver in a lubricating oil containing a conventional dispersant / inhibitor (DI) package was significantly improved for use in some Engines that run on biodiesel fuel. As described more fully herein, such lubricating oil compositions may be particularly useful for lubricating internal combustion engines (eg, heavy-duty diesel engines and light-duty diesel engines, including diesel engines equipped with exhaust gas recirculator (EGR) systems). Lubricant compositions containing highly grafted multifunctional olefin copolymers may have improved soot dispersion properties (deagglomeration), deposit control and boundary film formation properties, as well as impro...

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Abstract

A diesel engine operating on a fuel containing from about 5 to about 100 wt. % biodiesel components is lubricated with a lubricating oil composition including a major amount of oil of lubricating viscosity, and a minor amount of at least one highly grafted, multi-functional olefin copolymer. The olefin copolymer is made by reacting an acylating agent with an olefin copolymer having a number average molecular weight greater than about 1,000 in the present of a free radical initiator to provide an acylated olefin copolymer having a degree of grafting (DOG) of the acylating agent on the olefin copolymer of at least 0.5 wt.%, and reacting the acylated olefin copolymer with an amine to provide the highly grafted, multi-functional olefin copolymer. As used, the highly grafted, multi-functional olefin copolymer is effective to reduce a viscosity increase in the lubricating oil composition for the engine.

Description

[0001] Related applications: [0002] This application claims priority to Provisional Application No. 60 / 887,539, filed January 31, 2007. Technical field: [0003] The present invention relates to the lubrication of biodiesel fueled engines and to improved lubricating compositions for biodiesel fueled engines providing improved performance. Background technique: [0004] Emission requirements for various vehicles are becoming more and more stringent. For example, improvements in diesel engine design required to meet emissions requirements have resulted in increased soot levels in engine lubricants. Increased soot levels can lead to increased wear when the oil formulation is unsuitable due to increased oil viscosity and / or inability of particles to disperse which can lead to engine wear. In particular, with the advent of new exhaust gas recirculation or recirculation (hereinafter "EGR") cooled engines, including cooling exhaust gas recirculation engines, the ability of conv...

Claims

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Application Information

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IPC IPC(8): C10M143/00C10M135/10C10M129/50C10N30/06C10N30/04C10N30/10C10N40/25
CPCC10M2207/283C10N2230/02C10M2207/028C10M2207/289C10M149/02C10N2240/102C10N2230/041C10M2215/28C10M2219/046C10N2210/06C10M2205/028C10N2210/04C10N2230/78C10N2010/08C10N2010/12C10N2030/02C10N2030/041C10N2030/78C10N2040/252C10N2010/04C10M2217/06C10N2060/09
Inventor C·C·德夫林C·A·帕苏特
Owner AFTON CHEMICAL
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