High performance non-zinc, zero phosphorus engine oils for internal combustion engines

a technology of engine oil and non-zinc, applied in the direction of lubricant composition, liquid carbonaceous fuel, additives, etc., can solve the problem of harmful catalysts used by volatile sulfur
US20050043191A1Inactive Publication Date: 2005-02-24FARNG L OSCAR +4
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
FARNG L OSCAR
Publication Date
2005-02-24
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

A substantially zinc and phosphorous free lubricating oil meeting engine performance requirements contain an additive system containing metal detergents, at least one borated ashless dispersant, at least an amine antioxidant and a trinuclear molybdenum compound. The lubricant contains a minimum of 120 ppm boron and a minimum of 80 ppm molybdenum.
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Description

[0001] This application claims the benefit of U.S. Ser. No. 60 / 497,234 filed Aug. 22, 2003. FIELD OF INVENTION

[0002] The present invention is concerned broadly with lubricating compositions and more specifically with lubricating compositions for internal combustion engines that are substantially free of phosphorous and zinc. BACKGROUND OF INVENTION

[0003] Contemporary engine oil technology uses zinc dithiophosphates (ZDTP) or more specifically zinc dialkyldithiophosphate (ZDDP) for corrosion, oxidation and wear protection and metallic detergents for engine cleanliness. These additives are rich in sulfur, phosphorous and ash content, and play a critical role in meeting severe engine performance requirements. Unfortunately phosphorous tends to deactivate the catalysts typically employed for control of hydrocarbon emissions from the engine. Volatile sulfur is harmful to the catalysts used to control NOx emissions; and, zinc contributes to plugging engine exhaust particulate filters. A...

Claims

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