Saint-gobain Centre De Recherches Et D'etudes Europeen

Sébastien Bardon

Vincent Gleize

Anthony Briot

Craig A Willkens

Matteo Scalabrino

Bernard Bouteiller

Nicolas Bonnail

Gaëtan Champagne

Vincent Glaize

Julien Romeyer

Patrick Girot

Jointing cement intended in particular for fastening together a plurality of filter blocks of a filtering body of an exhaust gas particle filter of an internal combustion engine of a motor vehicle, having a silicon carbide (SiC) content of between 30% and 90%. The cement according to the invention includes at least 0.05% and less than 5% of a thermosetting resin, the percentages being percentages by weight relative to the total weight of the thermosetting resin and the mineral material, apart from the possible water.

Cement for particle filter

The present invention relates to a structure, for filtering particulate-laden gases, of the honeycomb type and containing an assembly of adjacent ducts or channels, whose axes are parallel to one another, separated by porous walls, the ducts being sealed off by plugs at one or other of their ends so as to form inlet chambers opening onto a gas entry face and outlet chambers opening onto a gas exit face, in such a way that the gas to be filtered passes through the porous walls, wherein said walls comprise material based on silicon carbide and the walls have an open porosity of between 30 and 53%; a median pore diameter of between 9 and 20 &#x3bc;m; the average number of open pores on the surface of the walls, the opening area of which is between 20 and 310 &#x3bc;m, is greater than 300 per mmof wall; and the ratio of the total opening area of said open pores to said area of the walls is between 0.15 and 0.30.

Silicon carbide based structure for filtrating gas

A block for filtering particles contained in an internal combustion engine exhaust gases, includes overlapping assemblies of adjacent input channels () and output channels (), the input and output channels being alternately arranged so as to form, in cross-section, a checkered pattern, the overall volume of the input channels () being greater than that of the output channels (). The filtering block is characterized in that at least one inner space () of one channel () includes at least one inner fin ().

Filtering block with fins for filtering particles contained in an internal combustion engine exhaust gases

A block, particularly for filtering particulates present in the exhaust gases of an internal combustion engine, includes a plurality of flow channels for the gases (14,14), each of the channels (14,14) being bounded by a side wall (), a plug (15,15) and an opening (19,19) terminating outwardly. The block according to the invention is remarkable in that a first portion () of the side wall () of at least one of the channels (14,14&#x2033;), called the 'reinforced channel', includes a reinforcement compared to the rest of the side wall () forming a second portion () of the side wall (), the ratio (R) of the thickness of the first portion () to the thickness of the second portion (), in any transverse plane of section (P), being between 1.1 and 3.

Block for filtering particles contained in exhaust gases of an internal combustion engine

A filter block, particularly for filtering particulates present in the exhaust gases of an internal combustion engine, including peripheral inlet () and outlet () channels arranged alternately at the periphery of the block and each including an external wall () exposed to the exterior of the block and an internal wall () arranged inside the block. The block according to the invention is remarkable in that it includes at least one group (G) of two adjacent peripheral channels () such that, in a transverse plane of section (P), the ratio R of the average thickness 'E' of all the external walls () of the group (G) to the average thickness 'e' of all the internal walls () of the (G) is greater than 1.2.

This structure () comprises first and second filtering elements (A,B) extending essentially parallel to a longitudinal axis (X-X') of the structure () between an admission region () of the gases into the structure () and an evacuation region () of the gases from the structure, and comprises a seal () for joining these elements (A,B). The seal () comprises at least one downstream pat () which has a thermal mass per unit length greater than the thermal mass per unit length of an upstream part () of the seal (). The invention is for use in particulate filters for the exhaust gases of a motor vehicle diesel engine.

Structure for filtering exhaust gases of an internal combustion engine, and associated exhaust line

This structure comprises first and second filtering elements (A,B) which are respectively provided with a first and a second face (A,B) arranged opposite each other and a seal () connecting said faces (A,B). The first face (A) comprises at least a first region (A) that does not adhere, or only slightly adheres to said seal (), opposite a first region (B) that strongly adheres to said seal () of the second face (B). The first region (A) that does not adhere or only slightly adheres is delimited by at least a portion of the edge () common to the first face (A) and a discharge face (). The first region (A) that does not adhere or only slightly adheres comprises a side (A) that diverges towards the discharge face () and which extends up to said common edge ().

Filtering structure, especially particle filter for exhaust gases of an internal combustion engine, and associated exhaust line

The inventive filter unit for filtering particles contained in exhaust gas of an internal combusting engine comprises sets of imbricated input channels () and adjacent output channels () which are fluidly communicating by means of the lateral walls thereof. Said lateral walls are cross-sectionally provided with a corrugation which is determined in such a way that the total volume of the input channels () is increased with respect to that of the output channels (), whereby the total volume (Ve) of the input channels () being greater than that (Vs) of the output channels ().

Filter unit for filtering particles contained in exhaust gas of an internal combusting engine

A filter body () which is intended, in particular, for the filtration of particles contained in the exhaust gases from an internal combustion engine. The filter body () is formed by bonding filter blocks () using a joint (). An outer surface () of the first of the blocks (), which is disposed opposite the second of the blocks () and which is in contact with the joint (), includes at least one projection- and/or cavity-type irregularity ().

Block for the filtration of particles contained in exhaust gases from an internal combustion engine

The structure comprises at least first and second filter members (A,B) respectively provided with first and second faces (A,B) placed facing each other, and a joint () interconnecting said faces and extending between said faces (A,B). The first face (A) comprises at least one region (A) of strong adhesion with said joint () and at least a region (A) of weak or no adhesion with the joint (). These regions (A,A) are located respectively facing a region (B) of the second face (B) presenting weak or no adhesion with said joint (), and a region (B) of the second face (B) presenting strong adhesion with said joint (). The structure is applicable to particle filters for the exhaust gas from an internal combustion engine.

Filtration structure for the exhaust gas from an internal combustion engine

A filter block for filtering particles contained in the exhaust gas of an internal combustion engine includes a plurality of channels for the circulation of the gas, a channel defined by a wall provided with a filtering zone and which opens out towards the outside via an opening, a group of channels including at least two channels with different respective F/P ratios between surface F of the filtering zone and surface P of the wall. One channel of the group of channels includes an opening whose surface O is larger than the surface F of the filtering zone of the channel.

Filter block for filtering particles contained in the exhaust gas of a combustion engine

A particulate filter for purifying exhaust gases of an internal combustion engine, in particular of a diesel engine, comprises a filtering body and heating elements for initiating combustion of soot particles accumulated on and in the filtering body. The heating elements comprise at least a hot spot ceramic ignitor (). The invention is applicable in the automotive industry.

Particulate filter for purifying exhaust gases of internal combustion engines comprising hot spot ceramic ignitors

The invention concerns a filtering body () consisting of a plurality of adjacent channels through the walls of which the exhaust gases are filtered. It comprises first (to) and second (to) filtering zones, the surface filtering the gases, relative to the unit area of the gas intake of the body (), being different in the first (to) and second (to) zones. The invention is applicable to a diesel engine.

Growing community of inventors

Lyons, France

Sébastien Bardon