An olefin-carboxylic acid copolymer, containing at least one free carboxylic acid side group, or a nitrogen compound quaternized with epoxide in the presence of an olefin-carboxylic acid copolymer, containing at least one free carboxylic acid side group, can be used as a fuel additive or lubricant additive. Processes can be used for preparing additives of this kind and fuels and lubricants additized therewith, such as a detergent additive. These additives, fuels, and lubricants can be used for reduction or prevention of deposits in injection systems of direct injection diesel engines, especially in common rail injection systems; for reduction of fuel consumption of direct injection diesel engines, especially of diesel engines with common rail injection systems; and for minimization of power loss in direct injection diesel engines, especially in diesel engines with common rail injection systems. The additives can also be used for gasoline fuels, especially for operation of DISI engines.

An olefin-carboxylic acid copolymer, containing at least one free carboxylic acid side group, or a nitrogen compound quaternized with epoxide in the presence of an olefin-carboxylic acid copolymer, containing at least one free carboxylic acid side group, can be used as a fuel additive or lubricant additive. Processes can be used for preparing additives of this kind and fuels and lubricants additized therewith, such as a detergent additive. These additives, fuels, and lubricants can be used for reduction or prevention of deposits in injection systems of direct injection diesel engines, especially in common rail injection systems; for reduction of fuel consumption of direct injection diesel engines, especially of diesel engines with common rail injection systems; and for minimization of power loss in direct injection diesel engines, especially in diesel engines with common rail injection systems. The additives can also be used for gasoline fuels, especially for operation of DISI engines.

Use of a paraffinic gasoil in a diesel fuel composition for reducing the build up of deposits in an Exhaust Gas Recirculation (EGR) system of a compression ignition internal combustion engine.

The present invention relates to a fuel composition comprising a liquid fuel and a compound of dimer amide quaternary ammonium type. The invention also relates to the use of the compound of dimer amide quaternary ammonium type as a detergent additive in a liquid fuel for internal combustion engine.

The present invention relates to a fuel composition comprising a liquid fuel and a compound of dimer amide quaternary ammonium type. The invention also relates to the use of the compound of dimer amide quaternary ammonium type as a detergent additive in a liquid fuel for internal combustion engine.

The present disclosure relates to a method of reducing regeneration frequency of a diesel particulate filter in a vehicle combusting diesel fuel. The method includes combusting a diesel fuel in a vehicle engine having a diesel particulate filter and wherein the diesel particulate filter requires regeneration thereof. The diesel fuel has less than about 50 ppmw of sulfur and one or more select additives to reduce a measured frequency of regeneration of the diesel particulate filter.

The present invention relates to a fuel additive composition comprising at least a first additive chosen from quaternary ammonium salts different from betaines, and at least a second additive chosen from amido alkyl betaines, wherein the weight ratio of the amount of the first additive to the amount of the second additive is within the range of from 1:4 to 4:1. The invention also relates to an additive concentrate and to a fuel composition comprising this additive composition, and also to the use thereof for preventing and/or eliminating the deposits in at least one of the internal parts of an engine.

The present invention relates to a fuel additive composition comprising at least a first additive chosen from quaternary ammonium salts different from betaines, and at least a second additive chosen from amido alkyl betaines, wherein the weight ratio of the amount of the first additive to the amount of the second additive is within the range of from 1:4 to 4:1. The invention also relates to an additive concentrate and to a fuel composition comprising this additive composition, and also to the use thereof for preventing and/or eliminating the deposits in at least one of the internal parts of an engine.

The present disclosure provides fuel additives including quaternary ammonium salt mixtures, fuel compositions including such additives, and methods of improving performance of fuel injector using such additives.

The use as a valve deposit controlling additive in a fuel composition for a direct injection spark-ignition internal combustion engine of a combination of: a) at least one hydrocarbyl-substituted aromatic compound; and b) at least one polyalkylene amine.