Abstract: A filtration device comprises a plurality of filtering units including a filtering medium. The filtering units are separated from each other by a ceramic mat or cloth coated with a ceramic glue, in order to secure the units to each other while keeping them mechanically and thermally independent. The units are then inserted into a structure, particularly a metallic or ceramic structure, and are secured thereto by a holder, also made of a ceramic mat or cloth coated with a ceramic glue.

Abstract: A burner for heating a filter cartridge for the exhaust gases of an engine until the oxidation and/or combustion of the solid particulates trapped in the cartridge, including a burner body having a closed end and, on the side opposite this closed end, an opening for removing the said gases. The burner further including at least one intake duct for a mixture of fuel and oxidiser terminating in the burner body tangentially to the burner body, so as to cause the mixture to swirl in the burner; an electrical ignition means for igniting the said mixture positioned inside the burner body; and a closure element obstructing the burner body, to limit the turbulence of the exhaust gases in the volume of the burner body bounded by the said closure element.

Abstract: A post-injection method for the regeneration of a device used to filter diesel engine exhaust gases. The method includes injecting a fully-pulverized hydrocarbon-, alcohol- and/or reducing-agent-type regeneration solution upstream of the oxidation catalyst (14) to increase the exhaust gases' temperature upon detection of clogging of the filter with particles. A computer uses temperature (2) and pressure (3) sensors disposed upstream of the filtration device to control injection of the regeneration solution from an electromagnetic injector (9). The regeneration solution is directed through a capillary (12) into the exhaust pipe (1) at a point located at a good distance from the injector, upstream of the catalyst (5), in order to be finely pulverized by the air.

Abstract: A method in which all or some of the particles contained in the exhaust gases of a diesel engine are retained on particle filters and burnt due to the action of a combustion catalyst. At least a part of the particle filters are obstructed when the temperature ?g of the exhaust gases for filtration is equal to or less than a threshold temperature ?s, so as to limit or avoid cooling of the obstructed part of the particle filters and to maintain the same at a temperature ?o greater than or equal to ?s up until the time when ?g becomes greater than ?s again and thus permit accelerated regeneration of the obstructed part of the particle filters. Also disclosed is an exhaust gas filtration device which permits the carrying out of the filtration method with continuous and regular regeneration of the particle filters.

Abstract: A post-injection method for the regeneration of a device used to filter diesel engine exhaust gases. The method includes injecting a fully-pulverised hydrocarbon-, alcohol- and/or reducing-agent-type regeneration solution upstream of the oxidation catalyst (14) to increase the exhaust gases' temperature upon detection of clogging of the filter with particles. A computer uses temperature (2) and pressure (3) sensors disposed upstream of the filtration device to control injection of the regeneration solution from an electromagnetic injector (9). The regeneration solution is directed through a capillary (12) into the exhaust pipe (1) at a point located at a good distance from the injector, upstream of the catalyst (5), in order to be finely pulverised by the air.

Abstract: A method in which all or some of the particles contained in the exhaust gases of a diesel engine are retained on particle filters and burnt due to the action of a combustion catalyst. At least a part of the particle filters are obstructed when the temperature ?g of the exhaust gases for filtration is equal to or less than a threshold temperature ?s, so as to limit or avoid cooling of the obstructed part of the particle filters and to maintain the same at a temperature ?o greater than or equal to ?s up until the time when ?g becomes greater than ?s again and thus permit accelerated regeneration of the obstructed part of the particle filters. Also disclosed is an exhaust gas filtration device which permits the carrying out of the filtration method with continuous and regular regeneration of the particle filters.

Abstract: Valve assembly (22) intended for closing a combustion chamber (14) of an internal-combustion engine and comprising a valve (36) and a valve seat (42), the valve lifting off from its seat in order to open the combustion chamber (14) by moving away from the latter.According to the invention, the valve seat (42) is designed to move relative to the combustion chamber (14) under the effect of the pressure prevailing in this chamber and thereby to reinforce the closing of the valve assembly.

Abstract: The present invention relates to a device for adjusting the camber angle of the wheel of a vehicle, the rotary axle of which is mounted on the hub carrier (12), at least one of the ends of which is movable in terms of a shift relative to a vertical plane passing through the axis of symmetry of the wheel, characterized in that this end is mounted in an eccentric movable in rotation on one of the fastening points of the arm (12) on a suspension device of the wheel (10, 11), the eccentric being driven in rotation as a function of the angle of lock of the wheels or of the suspension height.

Abstract: A device for improving the feed of diesel engines at low temperatures, particularly at temperatures less than the cloud point of gas oils, without modifying the specific chemical characteristics of the gas oil by recycling the scavenging flow from the injection pump, characterized in that recycling takes place either upstream of the fuel filter and is associated with recirculation towards the reservoir of the gas oil coming from the reservoir through a heat exchanger or directly in the direction of the reservoir with direct feed of the filter by the reservoir.

Abstract: In order to improve the wear resistance properties of lubricants, at least one compound of the following formula is incorporated therein: ##STR1## Rf is a perfluorinated radical, a=0 to 10,b=0 or 1 (if a=o and c=1),c=1 to 4 (2 if a.noteq.0),m=0 or 1,n=0 or 1,X is an aryl radical,Y is a 2-hydroxy-1-phenylethyl group,R.sub.1 and R'.sub.1 each represent a hydrogen atom or an alkyl, cycloalkyl or aryl radical,R.sub.2 and R'.sub.2 each represent a hydrogen atom or an acyl residue, at least one of the symbols R.sub.1 and R.sub.2 being other than H or CH.sub.3 if the sum a+m+n=0.

Abstract: Device for controlling the circulation of gases from and towards an internal combustion engine, wherein a sealing ring is provided with means for injecting a lubricating and cooling liquid such as oil in the gap between a continuous sealing surface around a passage within a sealing ring and the external surface of a rotary throttle, this device being applied to the high pressure and high temperature sealing of rotary throttle for four stroke engines.

Abstract: Device for controlling the evacuation of exhaust gases of a combustion chamber in an internal combustion engine.A rotary valve performs a continuous or alternate turning movement and synchronized with the rotation of the motor about an axis parallel to the axis of rotation of the motor and issues at the level of its transversal channel on one side on an orifice connected to the exhaust towards the outside.The invention is applied to the control of the exhaust of two stroke engines.

Abstract: Ethers of polyols are prepared by reaction of a polyol and an organic chloride in a two phase medium in the presence of a phase transfer catalyst. The ethers of polyols are useful as synthetic lubricants, as lubricant bases, as lubricant additives and as fuel additives.

Abstract: Apparatus permitting an improvement of the carburetion of internal combustion engines fitted downstream of a multibody carburetor and upstream of the induction manifold.The primary homogenization chamber forming an extension of the primary body issues tangentially via an orifice into the top of the secondary homogenization chamber, namely into an annular space defined by the walls of the secondary chamber and the secondary mixture supply pipe. The secondary chamber is equipped in such a way as to form a homogenizer and to this end has fixed vanes.Application to automobiles.