Lubricant composition for internal combustion engines

A lubricating oil composition and the technology of the composition are applied in the field of lubricating oil compositions of gasoline and diesel engines, which can solve the problems of limited antioxidant properties, turbid additives, and high product cost, and achieve improved anti-friction and anti-wear performance, good High temperature cleaning, good economical effect
CN102477340AActive Publication Date: 2012-05-30CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2012-05-30

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Abstract

A lubricant composition for internal combustion engines is provided, which comprises a lubricant base oil and a sulfonate detergent, wherein the content of the sulfonate detergent is 0.8% to 1.5% (by weight) calculated on the basis of the composition; the sulfonate detergent comprises calcium sulfonate with a ultra-high base number more than 400 mg KOH / g, calcium sulfonate with a high base number of 300 to 350 mg KOH / g and lithium sulfonate with a base number less than 150 mg KOH / g. The lubricant composition has low contents of S, P and sulfuric ash, the additives used have a low cost and are easily available, and the economical efficiency is better. The lubricant composition can not only meet the requirements for normal operation of engines but also meet the requirements for normal operation of automobile exhaust gas recirculation (EGR) systems.
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Description

technical field

[0001] The present invention is an internal combustion engine lubricating oil composition, specifically, a lubricating oil composition for gasoline and diesel engines. Background technique

[0002] With the increase of the number of automobiles in our country, automobile exhaust emission has become the main factor of polluting the environment. The exhaust gas contains substances that seriously pollute the air such as carbon monoxide, hydrocarbons and nitrogen oxides. Therefore, it is very necessary to filter and absorb vehicle exhaust. The current method of treating automobile exhaust is to install an exhaust converter, and the three-way catalyst in the converter oxidizes carbon monoxide and hydrocarbons in the exhaust to carbon dioxide and water, and nitrogen oxides are reduced to nitrogen and oxygen.

[0003] Three-way catalysts are very sensitive to sulfur, phosphorus and ash in engine lubricating oil. Excessive sulfur content will lead to an increase in...

Claims

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