Abstract:
A composition suitable for reducing sludge and degradation of elastomer seals in engines comprises an oil of lubrication viscosity and a minor amount of a sludge preventing/seal protecting nitrogen containing dispersant, which is a reaction product of a hydrocarbyl-substituted succinic acylating agent having a limited amount of low molecular weight substituent; and a polyamine or condensed polyamine containing less than 20 mole percent of polyamine components of 6 or fewer nitrogen atoms.
Abstract:
Composición de lubricante, que comprende: (a) un aceite de viscosidad lubricante; (b) de un 0,2 a un 5 por ciento en peso de un dispersante que comprende el producto de condensación de un polímero funcionalizado carboxílico con un resto aromático a través de una unión amida, imida, o éster; en la que el dispersante comprende un producto de condensación con una amina aromática que tiene al menos 3 anillos aromáticos y al menos un grupo amino primario o secundario; y (c) un compuesto de titanio soluble en aceite, en la que el compuesto de titanio soluble en aceite está presente en una cantidad para proporcionar de 5 a 10.000 partes por millón en peso de titanio.
Abstract:
The invention provides a method of lubricating an internal combustion engine equipped with a centrifugal oil mist separator, wherein the lubricant contains 0.1 wt % to 8 wt % soot resulting from operation of the engine, and wherein the lubricant composition comprises an oil of lubricating viscosity, and 0.2 wt % to 3 wt % of a soot dispersing additive having a shear stability index of 0 to 25, wherein the soot dispersing additive comprises a block copolymer comprising (i) a vinyl aromatic monomer block and (ii), a conjugated diene olefin monomer block.
Abstract:
A lubricant composition, comprising an oil of lubricating viscosity, a dispersant comprising the condensation product of a carboxylic-functionalized polymer with an aromatic moiety through an amide, imide, or ester linkage, and an oil-soluble titanium compound, exhibits good oxidative stability.
Abstract:
Formation of high-aqueous content sludge may be reduced in a sump lubricated diesel engine lubricated with a lubricating oil formulation that contains at least 0.07 or 0.08 weight percent nitrogen derived from one or more nitrogen-containing ashless dispersants, by including in the lubricant a polyalkylene oxide.
Abstract:
Reaction of a carboxylic acid-containing polymer with certain aromatic amines results in dispersant viscosity modifiers with improved soot handling performance in heavy-duty diesel engines, compared with reaction with non-aromatic amines.
Abstract:
The invention is directed to a method for reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine by supplying to the sump a lubricant composition which contains an oil of lubricating viscosity and a boron-containing ashless dispersant. The ashless dispersant may be selected from succinimide compounds prepared from aliphatic or aromatic amines.
Abstract:
The disclosed technology provides lubricating compositions comprising an oil of lubricating viscosity, an alkaline earth metal sulfonate detergent having a metal ratio of at least 10, in an amount to contribute 3 to 14 g KOH/kg of TBN to the lubricating composition, an ashless, sulfur free, hydrocarbyl phenolic compound in an amount of 0.4 to about 6.0 weight percent (wt%) of the composition, and an ashless dispersant; wherein the lubricating composition has total ash of 0.3 to 1.8 wt%, total detergent soap of 0.1 to 1.2 wt% and wherein the lubricating composition contains less than 0.1 wt% of a sulfur-containing phenolic detergent. The disclosed technology further relates to a method of lubricating a mechanical device (such as an internal combustion engine) with the lubricating composition. The disclosed technology further relates to the use of the of the lubricating composition in a heavy duty diesel internal combustion engine to improve control of at least one of the following (i) fuel economy, (ii) corrosion, (iii) cleanliness, and (iv) bore wear.
Abstract:
A lubricant composition, comprising an oil of lubricating viscosity, a dispersant comprising the condensation product of a carboxylic-functionalized polymer with an aromatic moiety through an amide, imide, or ester linkage, and an oil-soluble titanium compound, exhibits good oxidative stability.
Abstract:
The invention provides a lubricating composition containing a diarylamine, an aminobenzene and an oil of lubricating viscosity. The invention further relates to the use of the lubricating composition in an internal combustion engine. The invention further relates to the use of the lubricating composition to improve TBN retention.