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
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
  • F01N3/28—Construction of catalytic reactors
  • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
  • F01N3/2807—Metal other than sintered metal
  • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J35/00—Catalysts, in general, characterised by their form or physical properties
  • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
  • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
• • 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
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
• • 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
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
  • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
• • 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
  • F01N2330/00—Structure of catalyst support or particle filter
• • 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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated 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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
  • F01N2330/04—Methods of manufacturing
• • 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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/30—Honeycomb supports characterised by their structural details
• • 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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/30—Honeycomb supports characterised by their structural details
  • F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
  • F01N2330/321—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils with two or more different kinds of corrugations in the same substrate
• • 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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/30—Honeycomb supports characterised by their structural details
  • F01N2330/48—Honeycomb supports characterised by their structural details characterised by the number of flow passages, e.g. cell density
• • 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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/60—Discontinuous, uneven properties of filter material, e.g. different material thickness along the longitudinal direction; Higher filter capacity upstream than downstream in same housing

Definitions

• the invention relates to a honeycomb body for exhaust gas aftertreatment, and to a process for producing a honeycomb body for exhaust aftertreatment.
• the honeycomb body can be used as a catalyst carrier body in exhaust systems of mobile internal combustion engines, or used.
• a honeycomb body provides a large surface on which catalytically active material is positioned and brought into contact with the exhaust gas flowing through the honeycomb body.
• the invention finds particular application in exhaust gas purification in motor vehicles.
• honeycomb bodies for exhaust aftertreatment. Basically, a distinction is made between honeycomb bodies made of ceramic and metal. Because of the easier manufacture and the lower
• honeycomb body can be constructed with smooth and / or structured metallic layers or sheet metal foils. These metallic layers can be layered, wound and / or wound and finally placed in a housing of the honeycomb body, so that a multiplicity of ducts through which the exhaust gas can flow are formed.
• the channels for example, straight, wound and / or obliquely extend between the end faces of such a honeycomb body.
• honeycomb body for example, if this is located downstream of a deflection in the exhaust line and / or downstream of a curvature of the exhaust pipe, an inhomogeneous or non-uniform flow of the honeycomb body is not or only with relatively high effort to avoid. This regularly leads to such a honeycomb body can not be flowed through evenly, so that the honeycomb body can not be used ideally.
• a cleaning effect of the honeycomb body can be reduced, in particular because an optionally present catalytic coating is not completely and / or ideally in contact with the exhaust gas and / or possibly one or more with a separation function Channels of the honeycomb body are not sufficiently flowed through.
• a honeycomb ⁇ body for exhaust aftertreatment, and a method for producing a honeycomb body for exhaust aftertreatment are specified, which allow in particular in unfavorable installation situations of the honeycomb body in an exhaust system as even ⁇ moderate, or more uniform flow through the Wa ⁇ ben stresses.
• the honeycomb body should be as simple and inexpensive to produce.
• the honeycomb body for exhaust aftertreatment has a housing and a honeycomb structure with a multiplicity of (flow-through) channels, wherein the honeycomb structure is formed with at least one, at least partially structured, in particular metallic, layer and with at least one, in particular metallic, smooth layer.
• a (or at least one specific) cross section of the honeycomb structure has radial zones, wherein the at least one smooth layer is designed and positioned such that a first cell density in an inner radial zone in at least one axial section of the honeycomb structure in comparison to a second cell density in an outer radial zone is increased.
• the proposed honeycomb body is used in particular for after ⁇ treatment of an exhaust gas of an internal combustion engine of a motor vehicle.
• the proposed honeycomb body has, in particular, a radially varying / different or variable / variable flow resistance.
• the pre ⁇ troubled honeycomb body, as well as the hereinafter still proposed method allows in an advantageous manner, in particular also in unfavorable installation situations of the honeycomb body in an exhaust gas system, a uniform or more uniform flow through the honeycomb body, in particular because the Strö ⁇ flow resistance of the honeycomb body radially in the outer Zone is reduced (targeted) due to the lower cell density.
• the honeycomb body is advantageously comparatively simple and inexpensive to produce, in particular because the different cell densities are (exclusively) adjustable by the execution and positioning of the smooth layer.
• an additional support structure for holding the at least one at least partially structured layer is not absolutely necessary because the smooth layer can prevent adjacent regions of the at least partially structured layer and / or adjacent, at least partially structured layers from slipping into one another.
• existing tools for producing the honeycomb body can be used, because in particular the winding process for winding such layer packages can be technically easily adjusted.
• the honeycomb body can basically have different shapes, in particular a round, oval, polygonal or similar cross-section.
• such a honeycomb formed body with a tube-like housing In many cases, such a honeycomb formed body with a tube-like housing.
• the exhaust gas regularly enters via a first end side of the honeycomb body and out again via a second end side of the honeycomb body.
• the end faces which are preferably arranged substantially parallel to one another, regularly define the (axial) length of the honeycomb body in the direction of a center axis of the honeycomb body, wherein this center axis penetrates both end faces and is arranged perpendicularly and centrally in particular to at least one, preferably two end faces.
• the honeycomb body has at least one at least partially structured (metallic) layer. It is possible that a (single) layer has smooth and structured sections or sections with different structuring.
• the structure of the at least partially structured (metallic) layer is preferably formed over the entire length, ie between the first end side and the second end side.
• the structure of at least partially structured (metal ⁇ metallic) layer is carried, formed in particular from the first end side toward the second end face extending Erhe ⁇ environments and depressions, for example. Are stamped into the location.
• the surveys and depressions can be in
• Cross section form a kind of sine wave, zigzag or the like.
• the at least one at least partially structured layer and the min ⁇ least a smooth layer over the entire (axial) length of the honeycomb body extend.
• the channels or their cross sections can be
• a cross section of the honeycomb structure has radial zones with different cell density.
• Several, in particular ⁇ along the center axis and / or in an axial direction spaced cross-sections of the honeycomb structure may have radial zones with different cell density.
• The, or considered here cross-section (s) of the honeycomb structure is, or each lie in one in particular orthogonal to the center axis of the honeycomb body aligned cross-sectional plane.
• the terms "axial” and “radial” refer here, unless explicitly stated otherwise, to the center axis of the honeycomb body.
• the at least one smooth layer is designed and positioned such that in at least one axial section of the honeycomb structure, a first cell density in an inner radial zone is increased compared to a second cell density in an outer radial zone.
• the at least one axial section is at least spaced from the first end side or the second end side of the honeycomb body.
• the radial zones extend along the (total) axial length of the honeycomb structure.
• a ratio of second cell density to first cell density is in the range of 0.1 to 0.7, particularly preferably in the range of 0.25 to 0.6.
• the first cell density is in the range of 300 to 1000 cpsi (cells per square inch), more preferably in the range of 400 to 800 cpsi.
• the second cell density is in the range of 100 to 600 cpsi, in particular in the range of 100 to 400 cpsi.
• a plurality of outer radial zones in particular provided with different cell densities, wherein the cell densities in the outer radial zones are each smaller than the cell density in the inner radial zone.
• the outer (s) radial (s) zone (s) is, or are in particular such ange ⁇ arranged that they at least partially, preferably completely surround the inner radial zone.
• the inner radial zone is preferably arranged in the region of or around the center axis of the honeycomb body. More preferably, the outer radial zone in the region of the housing, or arranged on the housing.
• the inner radial zone can have different shapes, in particular a round, oval, polygonal or similar cross-section.
• the inner radial zone has a size of at least 50 cm 2 [square centimeters].
• the inner radial zone has a size in the range of 70 to 85 cm 2 .
• the outer radial zone may have a size of at least 70 cm 2 .
• the outer radial zone has a size in the range of 90 to 120 cm 2 .
• at least the inner radial zone or the outer radial zone is arranged coaxially with the center axis of the honeycomb body.
• the inner radial zone is preferably arranged centrally with respect to the cross section of the honeycomb structure.
• At least the inner radial zone or the outer radial zone is arranged at least as a function of a mounting situation of the honeycomb body in an exhaust system or as a function of an inflow profile of an exhaust gas flow flowing against the honeycomb body.
• the inner radial zone may be positioned eccentrically to the center axis of the honeycomb body.
• honeycomb body in the exhaust systems, or in the exhaust pipe, for example, such that the honeycomb body (immediately) downstream of a deflection in the exhaust system and / or downstream of a curvature of the exhaust pipe is arranged, so the honeycomb body with a flow profile the flow of exhaust gas is impinged, which has an eccentric to the center axis of the honeycomb body arranged flow profile maximum.
• the (on) flow profile describes the distribution of the flow velocity over the (on) flow cross section.
• the (on) flow profile maximum is present in particular in the region of the maximum flow velocity.
• the inner radial zone is central with respect to the flow of the honeycomb body, in particular centrally with respect to a (maximum) flow profile maximum of the honeycomb body. arranged body flowing on the exhaust gas flow.
• the inner radial zone is arranged such that a central region of the inner radial zone spans or overlaps a (inlet) flow profile maximum of the exhaust gas flow flowing in against the honeycomb body.
• the at least one, or each, smooth position is provided only in the inner radial zone.
• the at least one smooth layer extends over the entire (axial) length of the honeycomb body.
• a smooth-running length of the at least one smooth layer in the outer radial zone is shorter than in the inner radial zone.
• the smooth length describes the extent of the smooth layer in the axial direction, or longitudinal direction of the honeycomb body.
• the smooth length length preferably decreases radially outwards.
• the smooth layer length (radially) decreases steadily toward the outside, in particular linearly.
• the Glattla ⁇ gene length to a maximum in the region of the inner radial zone and a minimum in the region of the outer radial zone.
• the smooth layer is formed in the shape of a rhombus, wherein in particular two opposite peaks of the rhombus (radially) facing outward and have two more opposite peaks of the rhombus toward the end faces of the honeycomb body.
• the tips of the rhombus pointing toward the end faces of the honeycomb body lie in each case in a (radially) central region of the inner radial zone.
• the at least one smooth layer (only) in the region of a central axial region of the honeycomb body extends completely through the inner radial zone and the outer radial zone.
• the at least one smooth layer in the outer radial zone has at least one recess, wherein a recess length of the (the same) recess radially outwards increases.
• the recess length describes the extension of the recess in the axial direction, or longitudinal direction of the honeycomb body.
• the recess length (radial) preferably increases steadily toward the outside, in particular linearly.
• the smooth layer is formed in the shape of a double triangle, have, in particular two opposite Three ⁇ ecksbasistress of the double-triangle towards the end faces of the honeycomb body and the legs and / or tips of the two triangles of the double-triangle run together in a central region of the length of the honeycomb body, or are connected ver ⁇ .
• the at least one smooth layer extends (only) in the region of a first end side of the Wa ⁇ benMechs and / or in the region of a second end face of the honeycomb body completely through the inner radial zone and the outer radial zone.
• the at least one smooth layer in the outer radial zone has a plurality of holes, wherein at least one hole size or a hole density of the holes increases radially outward.
• a porosity of the at least one smooth layer may increase radially outward.
• holes may be provided in the inner radial zone, these holes in particular having a smaller hole size and / or hole density than the holes in the outer radial zone.
• a hole diameter of the holes (radially) increases toward the outside. More preferably, a distance between adjacent holes (radially) decreases toward the outside.
• a hole size, or a hole diameter, of the holes is in the range of 2 mm to 20 mm [millimeter], in particular in the range of 5 mm to 15 mm.
• the at least one smooth layer extends (only) in the region of a first
• the at least one smooth layer extends (only) in at least one, between the axial portion arranged completely through the inner radial zone and the outer radial zone.
• At least one first edge or one second edge of the at least one smooth layer has a (wave) profile with a maximum in the region of the inner radial zone and a minimum in the region of the outer radial zone.
• the smooth layer is preferably arranged such that the first edge points towards the first end side of the honeycomb body and the second edge toward the second end side of the honeycomb body.
• the profile of the first edge and / or the second edge may form a kind of sine wave, zigzag or the like.
• the (wave) profile of the first edge and / or second edge is in particular formed such that the maximum and the minimum of the profile extend in, or opposite, the axial direction of the honeycomb body.
• the smooth position is smooth even in the region of the profiled first edge and / or second edge.
• only the first edge or the second edge has the (wave) profile.
• the channels extend from a first (inlet) front side of the honeycomb body to a second (outlet) end side of the honeycomb body, wherein the channels extend obliquely to a center axis of the honeycomb body.
• the arrangement of the structure of the at least partially structured layer, or the elevations and depressions of the at least partially structured layer in the honeycomb body is such that they extend obliquely to the center axis.
• channels are formed which do not run parallel to the center axis, but at an angle to it.
• An embodiment of the structure is particularly preferred in such a way that the elevations and depressions are inclined differently in adjacent regions (viewed in the radial direction) or in adjacent layers, or differing from one another
• this orientation or orientation in the radial direction always looks different.
• the elevations and depressions at least partially, and preferably at no point of the honeycomb body lie on one another in a line, but cross each other and thus essentially form only punctiform support points with each other.
• This may result in a structure in which partial exhaust gas flows are permanently deflected and can flow into adjacent elevations or depressions, in particular in the manner of a zigzag.
• an angle between the elevations or depressions, as well as the center axis is a maximum of 20 ° [angle degree].
• the angle is in a range of 1 ° to 10 ° and most preferably in the range of 2 ° to 6 °.
• Channels that run obliquely to the center axis of the honeycomb body are particularly advantageous if the at least one
• the intersecting protrusions and depressions may advantageously prevent slippage of the, at least partially, structured layer (s) in the outer radial zone.
• the honeycomb body is formed cone-shaped.
• at least the housing of the honeycomb body or the honeycomb structure is formed in the manner of a cone.
• the channels can also expand conically or narrow.
• an angle between a housing wall and the center axis of the honeycomb body is in the range of 0.5 ° to 5 °
• a cone-shaped honeycomb body, or a cone-shaped housing of the honeycomb body is particularly advantageous if the smooth layer length has a minimum in the region of the outer radial zone and / or if (only) the first edge or the second edge of the at least one smooth layer a (wave) Profile with a minimum in the area of the outer radial zone.
• an optionally occurring Vorbondsredulement within the honeycomb structure in the (axial) range of the minimum are knitted by the conical shape of the honeycomb body, be ⁇ relationship example of the case in an advantageous manner contrary ⁇ .
• the at least one smooth layer is preferably formed symmetrically with respect to a center line of the smooth layer aligned in particular parallel to an axial direction of the honeycomb body.
• the at least one smooth layer preferably extends at least partially to two, in particular substantially opposite, regions of the housing. More preferably, contact two opposite edges of the at least one flat layer (partial) and / or two opposite edges of the min ⁇ least one at least partially structured layer has a housing inner sides.
• the honeycomb structure includes at least one, at least partially, structured (metallic) layer, and the min ⁇ least a (metallic) smooth layer, the wound, wound and / or may be stacked.
• the honeycomb structure is produced with a stack, comprising the at least one, at least partially, structured (metallic) layer, and the at least one (metallic) smooth layer, which is wound in an S-shape. If multiple stacks are used, these can be arranged as a U-shaped and / or V-shaped bent arrangement next to each other and wound together wound into a housing. Common to both embodiments is that all ends of the stacks and / or plies are directed outwards (that is, against a housing) while the bends (s, v, u) are positioned inside. In the stack are preferably alternately at least partially structured (metallic) layer, and the min ⁇ least a (metallic) smooth layer, the wound, wound and / or may be stacked.
• the honeycomb structure is produced with a stack, comprising
• each delimiting channels of the honeycomb body The walls of the channels can be smooth (flat in the direction of the channels and / or free of internals) and / or have projections, blades, holes and / or deflection surfaces for the exhaust gas.
• an exhaust gas flow which passes through the disc-shaped honeycomb body, comparatively and / or are mixed (eg with respect to the flow rate, the partial flow direction, the temperature and / or the like).
• a method for producing a honeycomb body is proposed aftertreatment system, wherein the honeycomb body comprises at least a casing and a honeycomb structure having a plurality of, in particular flow-through channels, wherein a cross section of the honeycomb structure (different ⁇ Liche) radial zones and wherein the method includes at least the following steps:
• the method for producing a honeycomb body presented here is used.
• the indicated sequence of the method steps results in a regular procedure of the method. Individual or all method steps can be performed simultaneously, sequentially and / or at least partially in parallel.
• the at least one smooth layer in step b) is preferably provided in such a form or shaped and / or processed that the smooth layer, in particular if it is arranged or aligned in step c) ( according to mood) with respect to the at least one at least partially structured , provided in an inner radial zone a first cell density which is higher than a second cell density in an outer radial zone.
• the bonding in step e) by means of a thermal joining method, in particular by means of a welding method or a (hard) Lötverfah ⁇ rens carried out.
• a thermal joining method in particular by means of a welding method or a (hard) Lötverfah ⁇ rens carried out.
• a use of a honeycomb body presented here for exhaust gas aftertreatment, preferably for after-treatment of an exhaust gas of an internal combustion engine of a motor vehicle, is proposed in particular.
• the details, features and advantageous embodiments discussed above in connection with the honeycomb body and / or the method may accordingly also occur in the case of the use presented here and vice versa.
• a motor vehicle comprising an internal combustion engine with an exhaust system
• the exhaust system has at least one catalyst carrier or a particle separator, which is designed with a honeycomb body described here.
• the catalyst support and / or the P have a catalytically active coating, which may optionally be carried out differently in axial sections of the honeycomb body.
• FIG. 1 shows a front view of a honeycomb body with radial
• FIG. 2 a front view of a stack
• FIG. 3 a detail view of the stack from FIG. 2
• FIG. 7 shows a plan view of another smooth layer
• FIG. 8 shows a sectional view of a conical honeycomb body.
• Fig. 1 shows schematically a front view of a honeycomb body 1 with radial zones 8, 9 of different cell density.
• the honeycomb body 1 has a housing 2 and a honeycomb structure 3 with a plurality of channels 4.
• a cross section 7 of the honeycomb structure 3 has radial zones with different
• Fig. 2 shows schematically a front view of a stack 25, comprising three, at least partially, structured metallic layers 5, and four metallic smooth layers 6.
• the stack 25, for example, s-shaped to a honeycomb structure (not shown here) for a honeycomb body (not here shown), or wound.
• FIG. 2 illustrates that the smooth layer 6 is embodied and poised in this way. is positioned that in at least one axial section (not shown here) of the honeycomb structure (not shown here), a first cell density 11 in an inner radial zone 8 is increased compared to a second cell density 12 in an outer radial zone 9.
• the smooth layers 6 are provided by way of example only in the inner radial zone 8.
• a first cell density 11 is achieved in the inner radial zone 8, which is twice as large as the second cell density 12 in the outer radial zone 9. Since the radial zones 8, 9 only set when the stack 25 is wound to the honeycomb structure, or wound, the subsequent assignment of areas of the stack 25 to the radial zones 8, 9 in Fig. 2 only indicated.
• FIG. 3 shows a detailed view of the stack 25 from FIG. 2.
• the detail view according to FIG. 3 relates to the arrangement of the at least partially structured layers 6 relative to one another.
• the channels 4 extend from a first end face 22 of the honeycomb body (not shown here) towards a second end face 23 of the honeycomb body, wherein the channels 4 extend obliquely to a center axis 24 of the honeycomb body, which in FIG 3 is entered for guidance only.
• Er are elevations 26 and depressions 27 at least partially structured layers 6 arranged so that they extend obliquely to ⁇ each other and to the center axis 24th
• ⁇ lichung an angle between the elevations 26 and the recesses 27 is entered in Fig. 3.
• the intersecting elevations 26 and depressions 27 offer the advantage here that the at least partially structured layers 6 do not slip into each other in the outer radial zone 9, in the example shown in FIG. 2 and FIG. 3 no smooth position between the at least partially structured layers 6 is provided.
• FIG. 4 shows a plan view of a smooth layer 6, which is designed and positionable in such a way that in an axial deflection 10 of the honeycomb structure (not shown here) a first cell density (not shown here) in an inner radial zone 8 in comparison to a second cell density (not shown here) is increased in an outer radial zone 9.
• a smooth layer length 13 of the smooth layer 6 in the outer radial zone 9 is shorter than in the inner radial zone 8.
• FIG. 4 illustrates that the smooth layer length 13 decreases radially outward, here even linearly.
• the smooth layer 6 is formed here in the manner of a rhombus. 4, both in the inner radial zone 8 and in the outer radial zone 9, offers the advantage that slippage of the at least partially structured layers in both zones can be prevented ,
• FIG. 5 shows a plan view of another smooth layer 6, which is designed and positionable such that in an axial section 10 of the honeycomb structure (not shown here) a first cell density (not shown here) in an inner radial zone 8 in comparison to a second cell density (not shown here) is increased in an outer radial zone 9.
• the smooth layer 6 in the outer radial zone 9 by way of example a recess 14, wherein a recess length 15 of the recess 14 increases radially outwardly steadily.
• the smooth layer 6 is formed here in the manner of a double triangle. That the smooth layer 6 as shown in FIG.
• Fig. 6 shows a plan view of a further smooth layer 6, which is designed and positioned so that in three axial Ab ⁇ sections 10 of the honeycomb structure (not shown here) a first cell density (not shown here) is increased in an inner radial zone 8 in comparison to a second cell density (not shown here) in an outer radial zone 9.
• the smooth layer 6 in the outer radial zone 9 a plurality of holes 16, wherein a hole size 28 and a hole density 29 of the holes 16 increases radially outward. That the smooth layer 6 as shown in FIG. 6 in several axial regions of the honeycomb body (not shown) extends completely through the inner radial zone 8 and the outer radial zone 9, offers the advantage that a bias and good solderability in (Almost) the entire honeycomb structure (not shown here) can be maintained.
• FIG. 7 shows a plan view of a further smooth layer 6, which is designed and positionable such that in an axial section 10 of the honeycomb structure (not shown here) a first cell density (not shown here) in an inner radial zone 8 in comparison to a second cell density (not shown here) is increased in an outer radial zone 9.
• a first edge 17 of the smooth layer 6 has a (Wel ⁇ len) profile 19 with a maximum 20 in the region of the inner radial zone 8 and a minimum 21 in the region of the outer radial zone 9.
• a second edge 28 of the smooth layer 6 is rectilinear, so that the smooth layer in the region of a second end face 23 of the honeycomb body extends completely through the inner radial zone 8 and the outer radial zone 9.
• the shape shown in Fig. 7 of the smooth layer 6 has the advantage that the shape shown in Fig
• Smooth layer 6 (almost) without waste can be made from a tape.
• FIG. 8 schematically shows a sectional view of a conical honeycomb body 1.
• the honeycomb body 1 has a center axis 24.
• FIG. 8 it can be seen that the housing 2 of the honeycomb body 1 and that in the housing 2 arranged and held honeycomb structure 3 of the honeycomb body 1 from the first end face 22 of the honeycomb body 1 toward the second end face 23 of the honeycomb body 1 to expand conically.
• Such a cone-shaped honeycomb body 1 is advantageous, for example, when the at least one smooth layer (not shown here) is formed as shown in FIG. 7. Then, during the winding of the at least one smooth layer resulting, axially variable bias of the honeycomb structure 3 by a slight tapering of the housing 2 of the honeycomb body 1 (almost) be compensated.
• honeycomb body for exhaust gas aftertreatment as well as a method for producing a honeycomb body for exhaust aftertreatment, are disclosed, which at least partially solve the problems described with reference to the prior art.
• the honeycomb body, as well as the method allow the most uniform, or more uniform, flow through the honeycomb body.
• the honeycomb body can be easily and inexpensively manufactured.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Exhaust Gas After Treatment (AREA)
• Catalysts (AREA)

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• 2016
  • 2016-08-16 DE DE102016215289.0A patent/DE102016215289B4/de active Active
• 2017
  • 2017-08-15 KR KR1020197007393A patent/KR102205069B1/ko active IP Right Grant
  • 2017-08-15 JP JP2019508830A patent/JP6733045B2/ja active Active
  • 2017-08-15 US US16/326,124 patent/US10605140B2/en active Active
  • 2017-08-15 CN CN201780048764.XA patent/CN109563755B/zh active Active
  • 2017-08-15 WO PCT/EP2017/070645 patent/WO2018033527A1/de unknown
  • 2017-08-15 EP EP17754335.2A patent/EP3500738A1/de not_active Withdrawn

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