Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Elf France

Institut Fran&ccedil;ais Du P&eacute;trole

Institut Du Petrole

Xavier Montagne

Bruno Delfort

Fabrice Paille

Thierry Lacome

Daniele Eber

Isabelle Durand

Bertrand Lecointe

Anne Jaecker

Nicolas Jeuland

Pierre Duret

Jacques Denis

Ludivine Pidol

Remi Touet

Jacques Lavy

Philippe Mulard

Stephane Venturi

Thierry Lac&ocirc;me

Richard Levesque

Michel Pasquereau

Jean-Pierre Dumas

Jean-Francedillaois Papagni

Laurent Forti

Philippe Mullard

The present invention relates to a method removing the fuel contained in the lubricating oil of an internal-combustion engine comprising an engine block with an air intake circuit for a fuel mixture, a burnt gas exhaust circuit, an oil sump and means for pumping the oil contained in the sump. According to the invention, the method consists in removing, after pumping the oil, the fuel diluted in the oil by heating intermittently the oil for a time ranging from 1/100 second to 10 second, in order to obtain vaporization of the fuel diluted in the oil.

Method of removing the fuel contained in the lubricating oil of an internal-combustion engine and engine using same

The present invention relates to a method for controlling autoignition of a fuel mixture, notably for a diesel type internal-combustion engine, according to which a fuel mixture is made in at least one combustion chamber () of the engine with a fuel and at least one fluid in order to obtain a homogeneous type combustion by autoignition. The method includes defining a desired combustion progress by autoignition of the fuel mixture, and adjusting the cetane number of the fuel used for the mixture to that of the fuel providing the desired combustion progress is obtained.

Fuel mixture autoignition control method, notably for diesel type internal-combustion engines, and engine using same

A diesel fuel formulation containing a high proportion of ethanol has a corrected flash point. This flash point modification is achieved by feeding into the mixture a liquid of low flash point such as a light fraction consisting of a C5 to C7 paraffin cut. The resultant formulation invention can be directly used in a vehicle.

High ethanol-content fuel compositions

A diese fuel composition containing a major proportion of at least one diesel fuel and a minor proportion of at least one glycerol acetal carbonate of the formulae: in which: where R1 and R2 are defined as above.

Diesel fuel compositions that contain glycerol acetal carbonates

A diesel fuel compound has a major proportion of at least one diesel fuel and a minor proportion of at least one glycerol acetal corresponding to one of general formulas:in which:

Diesel fuel compounds containing glycerol acetals

Diesel fuel compositions containing oxygenated compounds derived from tetrahydrofurfuryl

The present invention is a system for specific pollutants contained in diluted exhaust gases from thermal combustion engines, comprising a first module (1) which samples aldehyde and ketone emissions and a second module (2) which samples hydrocarbon emissions. The system according to the invention further comprises a control which coordinates the sampling(s) with predetermined working phases of the thermal engine. The first module (1) comprises a circuit (3) for trapping the aldehydes and the ketones contained in the diluted exhaust gases and a dilution air sampling circuit (4).

System for sampling specific pollutants contained in diluted exhaust

Process for delivering and for metering at least one additive to the

Disclosed is a composition resulting, in a first stage, from the reaction of at least one alkenyl or polyalkenylsuccinic acid or anhydride on at least one 1-(2-hydroxyethyl)-imidazoline substituted in the 2-position by a linear or branched alkyl or alkenyl radical, with 1 to 25 atoms of carbon in an imidazoline to succinic derivative molar ratio of 0.1:1 to 0.9:1 with the removal of at least 0.15 mole of water per mole of imidazoline, and then, in a second stage, from the reaction of the product obtained in the first stage on at least one polyamine in an amount representing at least 0.1 mole per mole of the succinic derivative utilized in the first stage. Also disclosed are methods for the utilization of these compositions as multifunction additives in engine fuels having as a base hydrocarbons or a mixture of hydrocarbons and at least one oxygen compound selected from the group constituted by alcohols and ethers.

Hydroxyimidazolines and polyamine fuel additive compositions

Formulations of additives for engine fuels comprising at least one constituent (A) and one constituent (B) resulting from the reaction of at least one alkenyl or polyalkenyl-succinic derivative with at least one polyamine to form constituent (A) and with at least one 1-(2-hydroethyl) imidazoline substituted in the 2-position by a linear or branched alkyl or alkenyl radical with 1 to 25 atoms of carbon to form constituent (B). The preferred formulations also contain a constituent (C) consisting of at least one polyglycol soluble in said fuel, with an average molecular mass ranging from 480 to 2,100. The (A)/(B) and (A)+(B)/(C) molar ratios preferably are respectively 0.2/1 to 5/1 and 0.05/1 and 20/1.

Formulations of nitrogenated additives for engine fuels and the engine

Growing community of inventors

Rueil Malmaison, France

Xavier Montagne