EP3085915B1 - Einheit zur reinigung von abgasen, und abgasleitung, die eine solche einheit umfasst - Google Patents

Einheit zur reinigung von abgasen, und abgasleitung, die eine solche einheit umfasst Download PDF

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Publication number
EP3085915B1
EP3085915B1 EP15305612.2A EP15305612A EP3085915B1 EP 3085915 B1 EP3085915 B1 EP 3085915B1 EP 15305612 A EP15305612 A EP 15305612A EP 3085915 B1 EP3085915 B1 EP 3085915B1
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EP
European Patent Office
Prior art keywords
inlet
exhaust gas
purification
outlet
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP15305612.2A
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English (en)
French (fr)
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EP3085915A1 (de
Inventor
Jean-Paul Brunel
Marc Leroux
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Faurecia Systemes dEchappement SAS
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Faurecia Systemes dEchappement SAS
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Priority to EP15305612.2A priority Critical patent/EP3085915B1/de
Priority to KR1020160048055A priority patent/KR101825292B1/ko
Publication of EP3085915A1 publication Critical patent/EP3085915A1/de
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Publication of EP3085915B1 publication Critical patent/EP3085915B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/02—Two or more expansion chambers in series connected by means of tubes
    • F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions

Definitions

  • the invention generally relates to exhaust gas purification assemblies.
  • Purification devices with a U-shaped architecture are frequently used in vehicles with rear-exit engines. They are placed in the engine compartment.
  • the Figures 1 and 2 represent a U-shaped purification device according to the state of the art.
  • the first and second substrates 2 and 4 are cylindrical blocks having, perpendicular to the first and second directions, circular sections.
  • the outlet of the first purification member is connected to the inlet of the second purification member by a volume 6, formed of a bezel 8 and a cover 10.
  • the bezel 8 is a plate having two orifices 12, 14 of sections circular, to which the first and second purification members are attached.
  • the orifices 12 and 14 are delimited by collars, visible on the figure 1 .
  • the inlet of the first purification member is defined by an inlet cover 15, visible on the figure 1 .
  • DE 10 2013 100 454 describes an exhaust gas purification device whose two purification units are placed in the extension of one another. The entry and exit of exhaust gas are formed in the common envelope surrounding the two purification members.
  • a constant concern of manufacturers of exhaust purification device is to obtain a rapid temperature rise of the purification substrates. For this, it is important to reduce the thermal inertia of the various constituents of the device.
  • the invention relates to an assembly of the aforementioned type, characterized in that the purification device comprises an outer cover covering both the first inlet and the second outlet, and an inner cone housed in the outer cover, the inlet and outlet of exhaust gas being provided in the outer cover, the inlet being mechanically connected directly to the upstream equipment, the inner cone having an outlet end covering only the first inlet and a connected inlet end tightly at the entrance.
  • the inlet cover 15 is mechanically connected to the upstream equipment, the forces thus passing through the inlet cover 15. It must be made of a rather thick material, which gives it a significant thermal inertia.
  • the invention relates to an exhaust line comprising an assembly having the above characteristics.
  • the device 1 represented on the figure 3 is intended for the purification of the exhaust gases of a vehicle, typically of a motor vehicle equipped with a heat engine such as a car or a truck.
  • the purification device 1 is intended to be integrated in an exhaust line. It is connected upstream to a collector sensing the exhaust gas leaving the combustion chambers of the engine, and downstream to a cannula for releasing purified exhaust gas into the atmosphere.
  • the collector and the cannula are not represented.
  • Other equipment is generally interposed between the purification device and the collector, for example a turbo compressor. Still other equipment, such as silencers, are interposed between the purification device and the cannula.
  • the purification device 1 comprises an exhaust gas inlet 16, fluidly communicating with the upstream part of the exhaust line, and an exhaust gas outlet 18, fluidly communicating with the downstream part of the exhaust line. .
  • Upstream and downstream are meant here relative to the direction of normal exhaust gas flow.
  • the first and second directions D1, D2 are parallel and opposite to each other. Alternatively, they are slightly inclined relative to each other.
  • the longitudinal direction will be called a direction parallel to, or substantially parallel to, the first and second directions.
  • the first purification member 20 further comprises a first outer casing 28 delimiting a first exhaust gas inlet 30 in the first purification unit, and a first exhaust gas outlet 32 out of the first purification unit.
  • the second purification member 24 comprises a second outer envelope 34 delimiting a second exhaust gas inlet 36 inside the second purification member, and a second exhaust outlet 38 out of the second purification.
  • the first and second substrates 22, 26 are housed inside the first and second envelopes 28, 34 respectively.
  • the purification device 1 further comprises a volume 40, fluidly connecting the first outlet 32 to the second inlet 36.
  • first and second purification members 20, 24 are arranged side by side and substantially parallel to each other.
  • first and second purification members have respective central axes parallel to one another, these central axes being typically longitudinal, that is to say parallel to the first and second directions.
  • the central axis of the first purification member is defined as the axis passing through the centers of all the straight sections of the first purification member, these straight sections being taken perpendicularly to the first direction.
  • the central axis of the second purification member corresponds to the axis passing through the centers of all the straight sections of the second purification member, these straight sections being taken perpendicularly to the second direction.
  • the first and second purification members are arranged side by side, in the sense that first and second respective surfaces 42, 44 of the first and second substrates 22, 26 are placed facing each other, c that is to say one face to the other.
  • the first substrate 22 has, perpendicular to the first direction, a first section having a first perimeter, the first surface 42 having, perpendicular to the first direction, a first width of between 7% and 50% the first perimeter.
  • the second substrate 26 has perpendicularly to the second direction a second section having a second perimeter, the second surface 44 presenting, perpendicular to the second direction, a second width of between 7% and 50% of the second perimeter.
  • the first perimeter corresponds to the perimeter of said section.
  • the second substrate typically has a constant cross-section along the second direction.
  • the second perimeter corresponds to the perimeter of this cross-section.
  • the second substrate has straight sections that vary slightly along the second direction.
  • the second perimeter is the average of the perimeters of all the straight sections of the second substrate.
  • the first width corresponds to the width of the first surface 42 taken perpendicular to the first direction.
  • the first width is taken along the perimeter of the first substrate 22.
  • the second width corresponds to the width of the second surface 44 taken perpendicular to the second direction, following the perimeter of the second substrate 26.
  • the first width is greater than 7% of the first perimeter, preferably greater than 10% of the first perimeter, and even more preferably greater than 15% of the first perimeter. It is less than 50% of the first perimeter, which means that the first substrate 22 is not entirely housed in the second substrate 26, but is placed next to it.
  • the second width is greater than 7% of the second perimeter, preferably greater than 10% of the second perimeter and more preferably greater than 15% of the second perimeter. It is less than 50% of the second perimeter, which means that the second substrate 26 is not entirely housed in the first substrate 22.
  • the first surface 42 has for example a constant width when following said surface 42 in the first direction.
  • the first width then corresponds to said width.
  • the first surface has a variable width when following the first surface parallel to the first direction.
  • the width of the first surface considered in section perpendicular to the first direction is then chosen as the first width.
  • the second surface 44 may have a constant width when it follows in the second direction, said width then corresponding to the second width.
  • the second surface has variable widths when it is followed according to the second direction. The second width is then considered as the average of the widths of the second surface considered in section perpendicular to the second direction.
  • the first and second surfaces 42, 44 have respective shapes co-adapted such that at least one of the first and second surfaces 42, 44 is separated at all points from the other of the first and second surfaces 42, 44 by a distance less than 30 mm, preferably less than 25 mm, a distance between the envelopes 28 and 34 less than 10 mm, preferably less than 5 mm.
  • the first and second surfaces 42, 44 extend longitudinally substantially the entire length respectively of the first and second substrates 22, 26.
  • each point of the first surface 42 is placed opposite a point of the second surface 44, but the opposite is not true, because the first substrate 22 is shorter than the second substrate 26.
  • the second substrate 26 is shorter than the first substrate 22, each point of the second surface thus being placed opposite a point of the first surface.
  • the first and second substrates are of the same length, each point of the first surface thus being placed opposite a point of the second surface.
  • the distance from one point of the first surface 42 to the second surface is taken by considering a direction perpendicular to the first surface and passing through said point.
  • the first and second surfaces 42, 44 taken perpendicular respectively to the first and second directions, have in all respects a radius of curvature typically greater than 25% of the first perimeter.
  • the first and second surfaces 42, 44 each have a curvature sufficiently small that they can be placed close to each other at all points.
  • the first surface 42 is preferably bulged towards the second surface 44, and conversely the second surface 44 is preferably curved towards the first surface 42.
  • the first surface 42 is concave towards the second surface. 44, and vice versa.
  • At least one of the first and second surfaces 42, 44 is flat, and preferably the first and second surfaces 42, 44 are both flat.
  • one of the first and second surfaces 42, 44 taken perpendicular respectively to the first and second second directions, has a radius of curvature between 0.5 x (P1 / 2 ⁇ ) and 2 x (P1 / 2 ⁇ ) where P1 is the first perimeter, preferably between 0.75 x (P1 / 2 ⁇ ) and 1, 25 x (P1 / 2 ⁇ ).
  • At least one of the first and second surfaces 42, 44 has a pronounced curvature.
  • first and second surfaces 42, 44 both have pronounced radii of curvature close to or substantially equal to each other.
  • one of the two surfaces 42, 44 is concave.
  • the other of the two surfaces is convex, and is engaged in the concave surface.
  • the concave surface and the convex surface are substantially complementary to one another.
  • the first envelope 28 comprises a first peripheral wall 46 which, considered perpendicular to the first direction, completely surrounds the first substrate 22.
  • the second envelope 34 comprises a second peripheral wall 48 which, considered perpendicular to the second direction completely surrounds the second substrate 26.
  • the first and second peripheral walls are distinct from each other. They did not come together with each other. They are tubular.
  • the first peripheral wall 46 comprises a first central section 50 in which the first substrate 22 is housed, and a first downstream end 52 defining the first exhaust gas outlet 32.
  • the first downstream end 52 is integral with the first downstream section 50, and extends the latter in the first direction, towards the volume 40.
  • the second peripheral wall 48 comprises a second central section 54 in which the second substrate 26 is housed, and a second upstream end 56 defining the second inlet 36 of exhaust gas.
  • first and second peripheral walls 46, 48 are entirely separated from each other by at least 75% of the longitudinal length of the first or second peripheral wall.
  • the first peripheral wall is longitudinally shorter than the second peripheral wall, the first and second peripheral walls 46, 48 thus being entirely separated over at least 80% of the longitudinal length of the first peripheral wall.
  • first downstream end 52 of the first peripheral wall is in contact with the second upstream end 56 of the second peripheral wall, but the first and second central sections 50, 54 are entirely separated from each other. They are never in direct contact with each other
  • the gap 58 between the two central sections 50, 54 allows the peripheral walls to expand freely at high temperature.
  • the purification device comprises spacers 60, interposed between the first and second peripheral walls, so as to maintain a spacing between the first and second central sections 50, 54.
  • the spacers 60 may have any suitable shape: metal tab, rod extending parallel to the first and second directions etc.
  • the first central section 50 has, in section perpendicular to the first direction, a shape substantially corresponding to that of the section of the first purification member 22.
  • a gap 62 of substantially constant thickness separates the first substrate 22 of the first central section 50.
  • a mat of a fibrous material 64 is interposed between the first substrate 22 and the first central section 50.
  • This mattress makes it possible to maintain the first substrate 22 radially and axially in position with respect to the first envelope.
  • the second central section 54 has, considered in section perpendicular to the second direction, a shape substantially corresponding to that of the second substrate 26.
  • a mattress 66 is interposed between the second substrate 26 and the second central section 54.
  • the first and second central sections 50, 54 also have respective surfaces 68, 70 facing each other, and separated from each other by the gap 58.
  • one of the surfaces 68, 70 is separated at any point from the other by a distance of less than 10 mm, preferably less than 5 mm.
  • the purification device 1 comprises a single peripheral wall 72 with a closed contour which, considered perpendicular to the first direction, completely surrounds the first and second substrates 22, 26.
  • the single peripheral wall 72 includes a first zone 74 partially surrounding the first substrate 22, and a second zone 76 partially surrounding the second substrate 26.
  • the first and second zones constitute the first and second peripheral walls 46, 48 of the first and second outer envelopes 28, 34.
  • the first purification member 20 comprises a first ply 78 of fibrous material interposed between the first substrate 22 and the single peripheral wall 72.
  • the first ply 78 considered perpendicular to the first direction, completely surrounds the first substrate 22.
  • a zone 80 of this web is interposed between the first substrate 22 and the second substrate 26.
  • the web 78 is provided to retain the first substrate 22 in position relative to the single peripheral wall 72.
  • the second purification member 24 comprises a second ply 82 of fibrous material, interposed between the second substrate 26 and the single peripheral wall 72.
  • the second ply 82 considered perpendicular to the second direction, completely surrounds the second substrate 26.
  • An area 84 of the second web is interposed between the first and second substrates.
  • the first and second substrates are separated from each other by the zone 80 of the first ply and by zone 84 of the second ply, the two zones being stacked one on the other.
  • the second ply 82 is provided to hold the second substrate 26 in position relative to the single peripheral wall 72.
  • At least one seal 86 is preferably disposed in contact with both the first fibrous web 78, the second fibrous web 82 and the single peripheral wall 72.
  • two seals 86 are arranged, on both sides of the two substrates, in the same plane as the zones 80 and 84. These seals prevent leakage of exhaust gas between the fibrous material plies and the peripheral wall. They also make it possible to press the first and second plies 78, 82 against the first and second substrates 22, 26, along the edges of these substrates.
  • the seals 86 are typically longitudinal rods made of a fibrous material.
  • the purification device comprises a peripheral layer 88 of fibrous material interposed between the first and second substrates 22, 26 on the one hand and the single peripheral wall 72 on the other hand.
  • the peripheral layer 88 considered perpendicular to the longitudinal direction, completely surrounds the first and second substrates 22, 26.
  • the purification device 1 further comprises an intermediate sheet 90 of fibrous material, interposed between the first and second substrates 22, 26. More specifically, the intermediate sheet 90 is interposed between the first and second surfaces 42, 44. extends over the entire width of the surfaces 42 and 44.
  • the intermediate web 90 divides the volume delimited internally by the peripheral layer 88 in two parts sealed against each other for the exhaust gas.
  • the first substrate 22 is housed in one of the two parts, the second substrate 26 in the other part.
  • the volume 40 is delimited by a lid 92 in the form of a cup, attached directly to the first and second outer shells 28, 34.
  • the cover 92 has a bottom 94 and a peripheral edge 96 with a closed contour projecting from the bottom 94, the peripheral edge 96 being directly attached to the first and second outer shells 28, 34.
  • the lid is not attached to a bezel-shaped piece such as the piece 8 shown on the figure 1 , this being in turn attached to the first and second envelopes 28, 34. Due to the absence of a spectacle-shaped part, it becomes possible to bring the first and second purification members 20, 24 one of them closer together. on the other and thus make the purification device much more compact.
  • the lid is in turn smaller. The disappearance of the bezel, and the fact that the lid is smaller, to lighten the purification device and reduce the thermal inertia of this device. In addition, the number of connections is reduced, which makes it possible to reduce the number of weld seams.
  • the dimensions of the spectacle-shaped part in particular the separation between the inlet and the outlet, are constrained, in the state of the art of the Figures 1 and 2 by providing enough material to form the necks surrounding the inlet and the outlet.
  • the bottom 94 of the lid is flat.
  • the peripheral edge 96 has a tubular shape.
  • the bottom 94 has a more complex shape, for example when an ammonia injection device or an ammonia precursor is mounted on the lid.
  • first and second purification members 20, 24 together define, at a end facing the volume 40, a continuous outer end surface 98, with a closed contour, the peripheral edge 96 of the lid being also continuous, closed contour.
  • the peripheral edge 96 is directly attached to the outer end surface 98.
  • the outer end surface 98 is tubular.
  • the outer end surface 98 is defined by the first downstream end 52 of the first envelope and the second upstream end 56 of the second envelope, without possibly the areas where they are pressed against each other.
  • first downstream end 52 and the second upstream end 56 are part of two walls distinct from each other, the first downstream end 52 and the second upstream end 56 being contiguous to one another so as to define a closed contour continuous surface.
  • the outer end surface 98 corresponds to the end of the single peripheral wall 72 facing the volume 40.
  • the peripheral edge 96 ends, opposite the bottom 94, by a free edge 100, with a closed contour, of shape conjugate with that of the outer end surface 98.
  • the free edge 100 is pressed against the surface of the outer surface.
  • the outer end surface 98 is engaged within the free edge 100.
  • the peripheral edge 96 and more precisely its free edge 100, internally delimits an opening 101 having, perpendicular to the first direction, a given surface.
  • the first outlet 32 has a first surface perpendicular to the first direction.
  • the second inlet 36 has a second surface perpendicular to the second direction.
  • the sum of the first and second surfaces is substantially equal to the given area.
  • the free edge 100 has a shape obtained by circulating a generatrix of determined shape, along a closed contour guide curve extending in a plane substantially perpendicular to the longitudinal direction.
  • the generator has for example the shape of a line segment of longitudinal orientation. Alternatively, it has the shape of a line segment slightly inclined with respect to the longitudinal direction.
  • the closed contour guideline can have any kind of shape. It is for example oval with or without bending in the central part, elliptical or any other shape.
  • first downstream end 52 and the second upstream end 56 advantageously have first and second respective sections 102 and 104 pressed against each other. other, as visible on the Figures 5 and 6 .
  • the first and second sections 102, 104 are advantageously straight, that is to say rectilinear. They typically extend parallel to the first and second surfaces 42, 44. If the first perimeter length is referred to as the perimeter length of the first downstream end, and the second perimeter length is the length of the perimeter of the second upstream end, then the first and second sections 102, 104 respectively extend over at least 15% of the first perimeter length and at least 10% of the second perimeter length, respectively.
  • first and second sections 102, 104 respectively extend over at least 20% of the first perimeter length and at least 15% of the second perimeter length respectively.
  • the first and second sections 102, 104 extend longitudinally over less than 25% of the longitudinal length of the first and / or second peripheral walls 46, 48.
  • first downstream end 52 and the second upstream end 56 have, perpendicular to the first and second directions, first and second sections greater than those of the first and second central sections 50, 54.
  • first downstream end 52 projects slightly outwardly of the first purification member relative to the first central section 50, and this over all or substantially all of its periphery.
  • second upstream section 56 projects outwardly from the second purification member relative to the second central section 54, and this over all or substantially all of its periphery.
  • the first downstream section is separated from the first central section by an outgoing shoulder 106.
  • the second upstream end 56 is separated from the second central section 54 by an outgoing shoulder 108.
  • This arrangement makes it possible to create the gap 58 between the central sections 50 and 54.
  • first downstream end 52 and the second upstream end 56 do not participate in the blocking in position of the first and second substrates through the fibrous webs 64 and 66. This maintenance is carried out exclusively at level of the central sections 50 and 54.
  • first and second sections 102, 104 are created at the first downstream end 52 and the second upstream end 56 regardless of the shape of the first and second substrates 22, 26.
  • the first and second substrates 22, 26 are of circular sections, considered perpendicular respectively to the first and second directions.
  • the first and / or second substrate has an oval shape or a race-track type shape, with two substantially flat sides or large radius of curvature, substantially parallel to one another, connected by arcs of smaller radius of curvature.
  • the first central section 50 has a cylindrical shape with circular sections.
  • the first downstream end 52 comprises a portion 110 in an arc of a circle, extending over at least 60% of the periphery of the first downstream end, in addition to the straight section 102.
  • the straight section 102 extends in a substantially tangent plane to the first substrate 22. It is connected to the portion 110 by flanks 112 connecting to the straight section 102 in a direction between the perpendicular to the straight section 102 and the tangent to the portion 110.
  • Straight section 102 is typically formed only at the ends of the canning.
  • the second central section 54 has a cylindrical shape, of circular section adapted to receive the second substrate 26.
  • the second upstream end 56 has an arcuate portion 114, extending over at least 60% of the periphery of the the second upstream end, in addition to the right section 104.
  • the straight section 104 extends in a plane tangential to the second substrate 26.
  • the straight section 104 is connected to the portion 114 by flanks 116 connecting to the straight section 104 in a manner direction between the perpendicular to the section 104 and the tangent to the portion 114.
  • the purification device 1 comprises an outer cover 118 and an inner cone 120 housed in the outer cover 118.
  • the first and second peripheral walls 46, 48 respectively have an upstream first end 122 delimiting the first exhaust gas inlet 30, and a second downstream end 124 delimiting the second exhaust gas outlet 38.
  • the outer cover 118 is of size and shape chosen so as to cover both the first inlet 30 and the second outlet 38. This means that the first upstream end 122 and the second downstream end 124 are fully housed in the outer cover 118. In a variant not shown, the outer cover 118 is housed in the first upstream end 122 and in the second downstream end 124.
  • the inlet 16 and the outlet 18 of exhaust gas are formed in the outer cover 118.
  • the inner cone 120 has an outlet end 126 covering only the first inlet 30, and an inlet end 128 sealingly connected to the inlet 16.
  • the outlet end 126 is housed in the first upstream end 122 or conversely the first upstream end 122 is housed in the outlet end 126.
  • the outer cover 118 has a generally cup-like shape, with a bottom 130 in which the inlet 16 and the outlet 18 are formed, and a side wall 132 extending around the bottom 130, and projecting from one side of the The side wall 132 is of closed contour, and protrudes longitudinally towards the first and second peripheral walls 46, 48.
  • first and second peripheral walls 46, 48 have substantially the same length longitudinally.
  • the first upstream end 122 and the second downstream end 124 thus together define another continuous external surface 134, closed contour, to which the side wall 132 is directly fixed.
  • the inlet 16 and the outlet 18 are delimited by necks 136 and 138 projecting outwardly from the purification device.
  • the necks 136 and 138 protrude from the bottom 130 longitudinally on a side opposite to the side wall 132.
  • the inlet 16 is mechanically connected directly to the upstream equipment 140 ( figure 13 ).
  • the upstream equipment 140 has an exhaust gas outlet 142, possibly extended by an exhaust gas circulation duct.
  • the inlet 16 is mechanically connected either directly to the exhaust gas outlet 142, or directly to the duct.
  • the neck 136 is rigidly fixed to the upstream equipment 140. For example, it is welded to a bicone 143 of the type shown in FIG. figure 16 it is itself connected to the upstream equipment 140, typically by a V-shaped collar.
  • the neck 136 is directly connected to a cone-flange of the upstream equipment 140, typically by a V-shaped collar. represented on the figure 13 the inlet 16 is fixed to the upstream equipment 140 by means of a flange 144.
  • At least the outer cover 118 is mechanically connected directly to the upstream equipment 140.
  • the internal cone 120 is mechanically connected to the upstream equipment 140 only via the outer cover 118, typically by its inlet end 128. This situation is represented on the Figures 12 to 15 .
  • the stresses and stresses transmitted between the purification device and the upstream equipment 140 are transmitted mainly through the outer cover 118. These efforts pass especially, or even exclusively, through the connection between the outer cover 118 and the upstream equipment 140.
  • the outer cover 118 is made of a relatively thicker material, for example having a thickness of between 1 mm and 2 mm.
  • the cover 118 is for example made of stainless steel, for example in 1.4509, 1.4510, 1.4512 or 1.4301.
  • the internal cone 120 because it does not take up effort, is made of a relatively less thick material than the outer cover 118, for example with a thickness of between 0.5 mm and 1 mm.
  • the inner cone 120 is made of stainless steel, for example 1.4509, 1.4510 or 1.4301.
  • the inner cone 120 is connected to the upstream equipment 140 with the outer cover 118.
  • a single link 145 doubles, secures the inner cone 120 and the outer cover 118 to the upstream equipment 140.
  • This single link 145 is for example a weld. In the example shown, it secures the inner cone 120 and the outer cover to the bicone 143, the latter being connected to the upstream equipment 140.
  • the outer cover 118 is made of a relatively thicker material, most of the effort will be transmitted between the purification device and the upstream equipment 140 via the outer cover 118. It is thus possible to realize the inner cone 120 in a relatively less thick material.
  • the materials and the thicknesses of the outer cover 118 and the inner cone 120 are typically those described by the first embodiment.
  • the inner cone 120 has a section widening from the inlet end 128 to the outlet end 126.
  • the outlet end 126 is rigidly attached, in a sealed manner, to the first end upstream 122. It has for example an inner section complementary to the outer section of the first upstream end 122, the first upstream end 122 being engaged in the outlet end 126 of the inner cone.
  • the inlet end 128 of the inner cone is engaged in the neck 136. It is rigidly fixed to the neck 136 by any suitable means. Typically, the inlet end 128 has an outer section of complementary shape to the inner section of the neck 136. It is fixed for example by a weld line (not shown) to the inner surface As a variant, it is fitted without play, which contributes to the absence of force transmission through the internal cone.
  • the inner cone 120 and the outer cover 118 delimit between them a space 146 extending over the entire periphery of the inner cone 120 and fluidly communicating with the outlet 18.
  • the exhaust gases leaving the second purification member 24 by the second outlet 38 will circulate around the internal cone 120, in the space 146, before being discharged through the outlet 18.
  • the arrangement described above has many advantages.
  • Making the inner cone 120 of a thin material reduces the weight and thermal inertia of the purification device. Furthermore, the fact that the space 146 allows the flow of exhaust gas leaving the second purification member around the inner cone 120, allows a rapid temperature rise of the inner cone 120, since this cone is exposed to the gas of exhaust both by its inner surface and by its outer surface. Thus, in the case where the first and / or second substrate must reach a minimum temperature for the exhaust gas depollution is effective, this temperature is reached faster.
  • the first and second substrates may be of any type suitable for the purification of the exhaust gases.
  • the first substrate is a three-way catalyst and the second substrate is another three-way catalyst, or a particulate filter.
  • the first substrate is for example an oxidation catalyst, and the second substrate is for example a particulate filter.
  • the first substrate is a PNA (Passive NOx Absorber, or passive NOx absorber) or a NOx trap (LNT Lean Nox Trap)
  • the second substrate is a particulate filter, or is a SCR type catalyst (Selective Catalytic reduction or selective catalytic reduction) or a catalytic filter SCRF type (Selective Catalytic Reduction Filter or selective catalytic reduction filter), or a SCRF type catalyst filter followed by a catalyst SCR type.
  • a mixing device is provided in the volume 40, preferably.
  • the purification device comprises a device for injecting a nitrogen oxide reducing product such as ammonia or an ammonia precursor, arranged to perform the injection upstream of the mixing device.
  • a nitrogen oxide reducing product such as ammonia or an ammonia precursor
  • the injection is typically carried out in volume 40.
  • the injected product is for example the product sold under the trade name Adblue, or an aqueous solution of urea, or else ammonia gas (ASDS technology).
  • first and second substrates 22, 26 do not necessarily occupy all the volume delimited internally by the first and second envelopes. As illustrated on the figure 15 one and / or the other of the substrates may occupy only a part of the longitudinal length of the first and / or the second envelope.
  • the free volume is then likely to be used for the implantation of a device for injecting a nitrogen oxide reducing product, or a mixer, or any other suitable device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (12)

  1. Anordnung, eine Reinigungsvorrichtung (1) für Abgase und eine stromaufwärts gelegene Ausrüstung (140), wie einen Turbolader, umfassend, wobei die Reinigungsvorrichtung (1) umfasst:
    - einen Eingang (16) für Abgase, der fluidisch mit der stromaufwärts gelegenen Ausrüstung (140) verbunden ist, und einen Ausgang (18), für Abgase;
    - ein erstes Reinigungselement (20), das eine erste Außenhülle (28) und ein erstes Reinigungssubstrat (22) für die Abgase in einer Aufnahme in der ersten Hülle (28) umfasst, wobei die Abgase gemäß einer ersten Richtung (D1) in dem ersten Substrat (22) strömen, die erste Hülle (28) eine erste Umfangswand (46) umfasst, die gemäß der ersten Richtung (D1) ein erstes stromabwärts gelegenes Ende (52), das einen ersten Ausgang (32) für Abgase begrenzt, und ein erstes stromaufwärts gelegenes Ende (122), das einen ersten Eingang (30) für Abgase begrenzt, aufweist;
    - ein zweites Reinigungselement (24), das eine zweite Außenhülle (34) und ein zweites Reinigungssubstrat (26) für Abgase in einer Aufnahme (26) in der zweiten Hülle (34) umfasst, wobei die Abgase in dem zweiten Substrat (26) gemäß einer zweiten Richtung (D2), entgegengesetzt zur ersten Richtung (D1) strömen, wobei die zweite Hülle (34) eine zweite Umfangswand (48) umfasst, die gemäß der zweiten Richtung (D2) ein zweites stromaufwärts gelegenes Ende (56), das einen zweiten Eingang (36) für Abgase begrenzt, und ein zweites stromabwärts gelegenes Ende (124) aufweist, das einen zweiten Ausgang (38) für Abgase begrenzt, wobei das erste und zweite Reinigungselement (20, 24) nebeneinander und im Wesentlichen parallel zueinander angeordnet sind;
    - ein Volumen (40), das fluidisch den ersten Ausgang (32) mit dem zweiten Eingang (36) verbindet;
    dadurch gekennzeichnet, dass die Reinigungsvorrichtung einen Außendeckel (118), der sowohl den ersten Eingang (30) und den zweiten Ausgang (38) abdeckt, und einen Innenkonus (120), der in dem Außendeckel (118) liegt, aufweist, wobei der Eingang (16) und der Ausgang (18) für Abgase in dem Außendeckel (118) eingearbeitet sind, wobei der Eingang (16) mechanisch direkt mit der stromaufwärts liegenden Ausrüstung (140) verbunden ist, und der Innenkonus (120) ein Austrittsende (126) aufweist, das nur den zweiten Eingang (30) und ein Eintrittsende (128) bedeckt, das in abgedichteter Weise an den Eingang (16) angeschlossen ist.
  2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Außendeckel (118) aus einem Material mit einer Dicke zwischen 1 mm und 2 mm hergestellt ist.
  3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Innenkonus (120) aus einem Material mit einer Dicke zwischen 0,5 mm und 1 mm hergestellt ist.
  4. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Innenkonus (120) und der Außendeckel (118) miteinander einen Raum (146) begrenzen, der sich über den gesamten Umfang des Innenkonus (120) erstreckt und fluidisch mit dem Ausgang (18) in Verbindung ist.
  5. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Eingang (16) durch einen Kragen (126) begrenzt ist, wobei das Eintrittsende (128) in den Kragen (136) eingreift.
  6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, dass das Eintrittsende (128) einen Außenquerschnitt aufweist, der im Wesentlichen identisch zu einem Innenquerschnitt des Kragens (136) ist.
  7. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die erste und zweite Hülle (28, 34) im Wesentlichen die gleiche Länge, jeweils gemäß der ersten und zweiten Richtung (D1, D2) genommen, aufweisen.
  8. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Außendeckel (118) einen Boden (130), in dem der Eingang (16) und der Ausgang (18) eingearbeitet ist, und einen Umfangsrand (132) aufweist, der den Boden (130) umgibt und von einer Seite des Bodens (130) herausragt, wobei der Umfangsrand (132) starr an der ersten und zweiten Hülle (28, 34) befestigt ist.
  9. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Austrittsende (126) des Innenkonus (120) starr an der ersten Hülle (28) befestigt ist.
  10. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Innenkonus (120) mechanisch mit der stromaufwärts liegenden Ausrüstung (140) nur mittels des Außendeckels (118) verbunden ist.
  11. Anordnung nach einem beliebigen der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Innenkonus (120) mechanisch mit dem Außendeckel (118) an die stromaufwärts gelegene Ausrüstung (140) angeschlossen ist.
  12. Fahrzeugabgasleitung, einer Anordnung einen beliebigen der vorhergehenden Ansprüche umfassend.
EP15305612.2A 2015-04-22 2015-04-22 Einheit zur reinigung von abgasen, und abgasleitung, die eine solche einheit umfasst Not-in-force EP3085915B1 (de)

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KR1020160048055A KR101825292B1 (ko) 2015-04-22 2016-04-20 배기 가스 정화 어셈블리, 이러한 어셈블리를 포함하는 배기 라인

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WO2020009713A1 (en) 2018-07-06 2020-01-09 Cummins Emission Solutions Inc. Decomposition chamber for aftertreatment systems
DE112021002674T5 (de) 2020-05-08 2023-02-23 Cummins Emission Solutions Inc. Konfigurierbare Nachbehandlungssysteme, einschliesslich eines Gehäuses

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JP2002256864A (ja) * 2001-02-28 2002-09-11 Toyota Motor Corp 流体処理システム
SE523602C2 (sv) * 2003-06-26 2004-05-04 Scania Cv Abp Låsanordning för montering av åtminstone en avgasrenande komponent i en avgaspassage
JP4698359B2 (ja) * 2005-09-22 2011-06-08 Ｕｄトラックス株式会社 排気浄化装置
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DE102008048796A1 (de) * 2008-09-24 2010-03-25 Emitec Gesellschaft Für Emissionstechnologie Mbh Abgasreinigungssystem für Dieselmotoren
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