发明名称 |
LUBRICANTS CONTAINING A BIMETALLIC DETERGENT SYSTEM AND A METHOD OF REDUCING NOx EMISSIONS EMPLOYING SAME |
摘要 |
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and an additive system comprising (A) from about 0.1 to about 5 % by weight of a detergent composition comprising at least two metal overbased compositions wherein said detergent composition consists essentially of (A-1) at least one alkali metal overbased detergent and (A-2) at least one calcium overbased detergent, wherein the ratio of total base number on a per 100 TBN and diluent-free basis contributed by the alkali metal detergent to the total base number contributed by the calcium detergent ranges from about 99.5-20 to about 0.5-80; (B) from about 1 to about 10 % by weight of a succinimide dispersant; and (C) from about 0.1 to about 5 % by weight of a metal dihydrocarbyl dithiophosphate of the formula (I) wherein R<1> and R<2> are each, independently, hydrocarbyl groups containing from 3 to 13 carbon atoms, M is a metal and n is an integer equal to the valence of M. Also disclosed a re methods for cleaning the combustion chamber of internal combustion engines, a method for reducing fuel consumption of internal combustion engines and a method for reducing NOx emissions of internal combustion engines.
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申请公布号 |
WO0144419(A8) |
申请公布日期 |
2004.04.22 |
申请号 |
WO2000US33703 |
申请日期 |
2000.12.13 |
申请人 |
THE LUBRIZOL CORPORATION;WILK, MELODY, A. |
发明人 |
WILK, MELODY, A. |
分类号 |
C10M169/04;C10M133/56;C10M137/10;C10M159/20;C10M159/22;C10M159/24;C10M163/00;C10M167/00;C10N10/02;C10N10/04;C10N10/06;C10N10/08;C10N10/12;C10N10/14;C10N10/16;C10N20/00;C10N30/00;C10N30/02;C10N40/25;(IPC1-7):C10M163/00 |
主分类号 |
C10M169/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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