Abstract:
The invention provides a lubricating composition containing (a) an oil of lubricating viscosity, (b) a phosphite having at least one hydrocarbyl group that has 4 or more carbon atoms, and (c) a compound derived from a hydroxy-carboxylic acid. The invention further relates to the use of the lubricating composition in an internal combustion engine.
Abstract:
In accordance with the present invention, it has been discovered that an additive which is substantially insoluble in, has low solubility in and/or is otherwise incompatible with a functional fluid, may be supplied to the functional fluid by use of a gel composition and/or a solid additive composition containing the additive, such that the functional fluid can receive the benefit of the supplied additive and/or contain levels of the additive not otherwise achievable by conventional delivery method due to the incompatibility of the additive with the functional fluid.
Abstract:
The disclosed technology relates to lubricants for compression ignition internal combustion engines, particularly those demonstrating at least one of improved seals performance, reduced deposit formation, and excellent durability. The present invention provides a low zinc lubricating composition comprising (a) an oil of lubricating viscosity, (b) a borated dispersant, and (c) a metal-free organo-phosphorus anti-wear additive, wherein the lubricating composition is substantially free of a metal containing sulfur coupled alkyl phenol compound. Further, the low zinc lubricating composition contains zinc in an amount less than 600 ppm by weight of the composition.
Abstract:
Un método de lubricación de un ajustador de juego libre de un tren de válvulas de balancín de pivote terminal de un motor de combustión interna de encendido por compresión de un vehículo de pasajeros que tiene una masa de referencia que no excede de 2610 kg que comprende suministrar al motor de combustión interna una composición lubricante que comprende un aceite de viscosidad lubricante, de un 0,01 % en peso a un 3 % en peso de un modificador de viscosidad dispersante, y de un 0,01 % en peso a un 3 % en peso de un agente antidesgaste que contiene azufre exento de cinc, en el que la composición lubricante tiene un contenido de azufre de menos de 5000 ppm, un contenido de fósforo de 1000 ppm o menos, y un contenido de ceniza sulfatada de 3000 a 12.000 ppm.
Abstract:
A lubricating composition includes (A) an esterified copolymer comprising units (A1) derived from a vinyl monomer and units (A2) derived from a carboxylic acid monomer, the vinyl monomer comprising a vinyl aliphatic monomer, the carboxylic acid monomer comprising an ethylenically unsaturated carboxylic acid or derivative thereof, esterified with a primary alcohol; and (B) a diene rubber copolymer comprising at least a first block (B1) derived from a conjugated diene monomer and at least a second block (B2) derived from a vinyl aromatic monomer. A ratio of the diene rubber copolymer to the esterified copolymer in the lubricating composition (B:A) is from 0.01 to 0.9, by weight.
Abstract:
The invention provides a lubricating composition containing an antiwear agent and an oil of lubricating viscosity. The invention further relates to the use of the lubricating composition in an internal combustion engine, or a driveline device.
Abstract:
The invention provides a lubricating composition containing an antiwear agent and an oil of lubricating viscosity. The invention further relates to the use of the lubricating composition in an internal combustion engine, or a driveline device.
Abstract:
Lubrication additives contain sulphur, which is bad for the environment. The invention provides a lubricating composition containing an antiwear agent and an oil of lubricating viscosity, containing a non-metallic cationic pnictogen salt of a hydroxy-carboxylic acid, or mixtures thereof. The invention further relates to the use of the lubricating composition in an internal combustion engine, or a driveline device.
Abstract:
The invention provides a lubricant composition comprising an oil of lubricating viscosity and 0.01 wt % to 15 wt % of a (thio)phosphoric acid salt of an N-hydrocarbyl-substituted gamma- (?-) or delta- amino(thio)ester. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.
Abstract:
Ultrasonic measurement apparatus 10 includes a transmitter 14 to transmit an ultrasonic signal 16 into an item 12. A receiver 18 receives echoes 20 from the item 12. The apparatus 10 measures the echo 20 and makes a comparison with another echo to extract information relating to a deposit of additional material at a surface of the item 12. For example, tribofilms or deposits may grow on the surface of the item 12 during use. A comparison of the echo, with previous echoes, allows the additional material to be detected and/or characterised.