Abstract: The present invention relates to the use, for reducing deposits in the internal parts of a spark ignition engine, of a fuel composition comprising at least three additives: a quaternary ammonium salt, a non-quaternary polyisobutylene succinimide and a Mannich base which is different from the other additives. The composition is such that the mass ratio of the quantity of the first additive to the quantity of the second additive is in the range from 0.2:1 to 2.5:1.

Abstract: 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.

Abstract: 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 Q additive in a liquid fuel for internal combustion engine.

Abstract: A fuel additive composition, including: (a) one or more copolymer(s) including: at least one unit of the following formula (I), where u=0 or 1, E=—O— or —N(Z)—, or —O—CO—, or —CO—O— or —NH—CO— or —CO—NH—, where Z represents H or a C1-C6 alkyl group, G represents a group selected between a C1-C34 alkyl group, aromatic ring, aralkyl including at least one aromatic ring and at least one C1-C34 alkyl group, and at least one unit of the following formula (II), where R1? is selected between a hydrogen atom and a methyl group, Q is selected between an oxygen atom and a group —NR?—, where R? is selected between a hydrogen atom and C1-C12 hydrocarbon chains, R includes a C1-C34 hydrocarbon chain substituted with at least one quaternary ammonium, (b) one or more amines substituted with a polyalkenyl group, and (c) at least one carrier oil.

Abstract: A fuel additive composition includes: (a) one or more copolymers including: at least one unit of formula (I) below: with u=0 or 1, E=—O— or —N(Z)—, or —O—CO—, or —CO—O— or —NH—CO— or —CO—NH—, with Z representing H or a C1-C6 alkyl group, G represents a group chosen from a C1-C34 alkyl, an aromatic nucleus, an aralkyl including at least one aromatic nucleus and at least one C1-C34 alkyl group, and —at least one unit of formula (II) below: in which R1? is chosen from a hydrogen atom and a methyl group, Q is chosen from an oxygen atom and a group —NR?— with R? being chosen from a hydrogen atom and C1 to C12 hydrocarbon-based chains, R comprises a C1 to C34 hydrocarbon-based chain substituted with at least one quaternary ammonium group.

Abstract: The present invention relates to a fuel composition comprising:—from 35% to 75% by weight of cyclopentane,—from 10% to 25% by weight of one or more aromatic hydrocarbon(s), and—up to 55% by weight of one or more branched alkane(s) chosen from 2-methylbutane and trimethylpentanes, with a weight ratio of the cyclopentane content to the aromatic hydrocarbon content greater than or equal to 2. The invention also relates to the use of such a composition for supplying a spark ignition engine, in particular for increasing the engine power and/or for reducing the specific fuel consumption of the engine and/or for increasing the octane number (RON).

Abstract: The invention relates to the use, in order to prevent deposits at low temperature on the fuel intake valves in indirect injection spark ignition engines, of one or more copolymer(s) comprising: at least one unit of following formula (I): and units of following formula (II): The copolymers according to the invention are very particularly effective in preventing and/or cleaning the deposits on the valves while preventing the latter from sticking at low temperature.

Abstract: A fuel additive composition, including: (a) one or more copolymer(s) including: at least one unit of the following formula (I), where u=0 or 1, E=-O— or —N(Z)—, or —O—CO—, or —CO—O— or —NH—CO— or —CO—NH—, where Z represents H or a C1-C6 alkyl group, G represents a group selected between a C1-C34 alkyl group, aromatic ring, aralkyl including at least one aromatic ring and at least one C1-C34 alkyl group, and at least one unit of the following formula (II), where R1? is selected between a hydrogen atom and a methyl group, Q is selected between an oxygen atom and a group —NR?—, where R? is selected between a hydrogen atom and C1-C12 hydrocarbon chains, R includes a C1-C34 hydrocarbon chain substituted with at least one quaternary ammonium, (b) one or more amines substituted with a polyalkenyl group, and (c) at least one carrier oil.

Abstract: A process controls the combustion of an internal combustion engine with controlled ignition and liquid fuel direct injection. The engine includes at least one cylinder with a combustion chamber, at least one intake, at least one exhaust and at least one direct injector for liquid fuel in order to obtain a fuel/air mixture in the combustion chamber. The process includes determining the operational zone of the engine in which particulates are emitted during combustion of the fuel/air mixture and, for operation of the engine in this determined zone, introducing into the combustion chamber another fuel/air mixture resulting from indirect injection of a gaseous fuel.

Abstract: The present invention concerns a process for controlling the combustion of an internal combustion engine with controlled ignition and liquid fuel direct injection in which the engine comprises at least one cylinder (12) with a combustion chamber (14), at least one intake means (16), at least one exhaust means (22) and at least one direct injection means (34) for liquid fuel in order to obtain a fuel/air mixture in the combustion chamber. In accordance with the invention, the process comprises: determining the operational zone of the engine in which particulates are emitted during combustion of the fuel/air mixture; for operation of the engine in this determined zone, introducing into the combustion chamber another fuel/air mixture resulting from indirect injection of a gaseous fuel.

Abstract: The present disclosure relates to a lubricating composition for a four-stroke engine, with low ash content including: a) one or more base oils selected from oils of Groups I-IV, preferentially from oils of Group III or IV from the API classification, b) at least one compound (b) selected from the group of heavy PAOs with a kinematic viscosity at 100° C.

Abstract: The invention relates to a method for the continuous determination of the damage to at least one system (7) used for the post-treatment of exhaust gases from an internal combustion engine (2), caused by the lubricating oil, the fuel and/or at least one lubricating oil additive and/or fuel additive used.

Abstract: Polymers containing triarylsilyl(meth)acryloyl units are erodible in seawater and can be used to formulate antifouling marine paints. The polymers are characterized by low levels of triarylsilyl(meth) acrylate units and an erosion rate in seawater of 2 to about 15 microns per month.

Abstract: The invention relates to a method and device for the continuous determination of the lubricating oil consumption of an internal combustion engine. The inventive method consists in: placing a determined quantity of at least one radioactive tracer in the lubricating oil of which the consumption is to be measured; and measuring the quantity of radioactive tracer(s) present in the gases released from the engine (2), said measurement being taken downstream of the engine.

Abstract: The invention relates to a method for the continuous determination of the damage to at least one system (7) used for the post-treatment of exhaust gases from an internal combustion engine (2), caused by the lubricating oil, the fuel and/or at least one lubricating oil additive and/or fuel additive used.

Abstract: The invention relates to a method and device for the continuous determination of the lubricating oil consumption of an internal combustion engine. The inventive method consists in: placing a determined quantity of at least one radioactive tracer in the lubricating oil of which the consumption is to be measured; and measuring the quantity of radioactive tracer(s) present in the gases released from the engine (2), said measurement being taken downstream of the engine.

Abstract: Polymers containing triarylsilyl(meth)acryloyl units are erodible in seawater and can be used to formulate antifouling marine paints. The polymers are characterized by low levels of triarylsilyl(meth) acrylate units and an erosion rate in seawater of 2 to about 15 microns per month.

Abstract: Copolymers containing triarylsilyl(meth)acryloyl units are erodible in seawater and can be used to formulate antifouling marine paints. The copolymers are characterized by low levels of triarylsilyl(meth)acrylate units and an erosion rate in seawater of 2 to about 15 microns per month.