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Patent Searching and Data

Document Type and Number:
Japanese Patent JP2010248529
Kind Code:

To provide a lubricating oil composition capable of enhancing lubrication performance in a diesel engine equipped with an exhaust gas recycling (EGR) unit.

This lubricating oil composition has a sulfur content of less than about 0.3 mass% and comprises a large quantity of an oil (a) of lubrication viscosity, a small amount of high-molecular weight polymer (b) comprising at least a copolymer (i) which is a copolymer of a hydrogenated polymer of a monovinyl aromatic hydrocarbon and a conjugated diene polymer and the hydrogenated polymer of a monovinyl aromatic hydrocarbon occupies at least about 20 mass% of the copolymer, an olefin copolymer (ii) containing alkyl or aryl amine or amide group, a nitrogen-containing heterocyclic group or an ester bond and/or a derivative (iii) of an acrylate having a dispersing group or an alkylacrylate copolymer, and a phenate detergent (c) which is a neutral and/or an over-based phenate detergent capable of providing to a lubrication oil composition at a ratio of about 6-about 50 mmol phenate surfactant per 1 kg of the final oil, and this lubricating oil composition contains in the lubrication oil composition a salicylate surfactant less than 1 mmol per 1 kg of the final oil.

Ritchie, Andrew J. D.
Bansal, Jai G.
Emert, Jacob
Fetterman, Glen P.
Gutierrez, Antonio
Irving, Matthew D.
Locke, Christopher J.
Minotti, Michael T.
Application Number:
Publication Date:
November 04, 2010
Filing Date:
July 07, 2010
Export Citation:
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International Classes:
C10M129/10; F02M25/07; C10L1/08; C10L10/08; C10L10/18; C10M101/02; C10M105/04; C10M127/02; C10M129/48; C10M129/54; C10M129/92; C10M129/95; C10M131/06; C10M133/04; C10M133/12; C10M133/16; C10M133/48; C10M133/56; C10M135/08; C10M135/28; C10M137/10; C10M141/06; C10M143/12; C10M145/14; C10M149/02; C10M159/16; C10M159/22; C10M161/00; C10M163/00; C10M165/00; C10M167/00; C10M169/04; C10N10/02; C10N10/04; C10N20/00; C10N30/04; C10N30/06; C10N40/25
Domestic Patent References: