EP4551800A1 - Katalysator zur abgasnachbehandlung mit verbesserter struktur - Google Patents
Katalysator zur abgasnachbehandlung mit verbesserter strukturInfo
- Publication number
- EP4551800A1 EP4551800A1 EP23737968.0A EP23737968A EP4551800A1 EP 4551800 A1 EP4551800 A1 EP 4551800A1 EP 23737968 A EP23737968 A EP 23737968A EP 4551800 A1 EP4551800 A1 EP 4551800A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- honeycomb body
- axial
- central axis
- sections
- catalyst
- 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.)
- Withdrawn
Links
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
- F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
-
- 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
- F01N3/2814—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates all sheets, plates or foils being corrugated
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
Definitions
- the invention relates to a catalyst for the aftertreatment of exhaust gases from an internal combustion engine with a honeycomb body wound from at least one metal foil, the honeycomb body having a central axis which extends along its axial extent from a gas inlet side of the honeycomb body to a gas outlet side of the honeycomb body, and the honeycomb body has a Has a plurality of flow channels through which flow can flow from a gas inlet side of the honeycomb body to a gas outlet side.
- metallic catalysts are installed in the exhaust system.
- an electrically heated heating disk can be installed upstream of the catalytic converter.
- this heating disk is held by so-called support pins, which are integrally connected to the support catalytic converter on one side and are integrally connected to the heating disk on the other side.
- the support pins serve, on the one hand, to mechanically fix the heating disk relative to the catalytic converter and, on the other hand, to electrically isolate the heating disk from the catalytic converter.
- Such catalysts which are used as supporting catalysts to support heating disks, are regularly produced by stacking and winding a plurality of metal foils on top of one another, the metal foils being alternately smooth and structured.
- the honeycomb body created by winding is inserted into a support shell, giving the catalyst its final shape.
- the one between the smooth foils and the structured ones Flow channels formed by foils are straight and run regularly parallel to the central axis of the catalyst.
- catalysts which do not have smooth films.
- the films are structured in such a way that the resulting flow channels run at an angle to the central axis. This creates so-called cross corrugations or so-called herringbone structures.
- An exemplary embodiment of the invention relates to a catalyst for the aftertreatment of exhaust gases from an internal combustion engine with a honeycomb body wound from at least one metal foil, the honeycomb body having a central axis which extends along its axial extent from a gas inlet side of the honeycomb body to a gas outlet side of the honeycomb body, and the The honeycomb body has a plurality of flow channels through which flow can flow from a gas inlet side of the honeycomb body to a gas outlet side, the honeycomb body being divided into individual axial sections along its axial extent, along which the central axis runs, the axial sections having flow channel sections which run along run at different angles to the central axis.
- the axial sections describe areas along the axial extent of the honeycomb body.
- the entirety of the axial sections forms the entire honeycomb body with its axial extent.
- the individual axial sections are created by specially shaped areas in the metal foils used.
- the honeycomb body is preferably produced from a single wound stack of layers, so that all axial sections formed in the honeycomb body are formed by the same metal foils.
- the large number of flow channels which are formed between the metal foils, run from the gas inlet side of the honeycomb body to the gas outlet side.
- the flow channels are characterized in that they can have different orientations within the individual axial sections with respect to the central axis of the honeycomb body.
- the flow channels within an axial section can, for example, run parallel to the central axis, be set at a positive angle to the central axis, or be set at a negative angle to the central axis.
- the radius at the deflection points is increased and the material load caused by the corrugation process is thus reduced. This reduces the occurrence of damage to the metal foils during the manufacturing process.
- the catalyst according to the invention has a honeycomb body which is constructed without a smooth layer, which is regularly used to separate the structured metal foils in order to prevent the metal foils from slipping into one another. This makes the construction of the honeycomb body easier and less material is required.
- the orientation of the flow channels in the axial sections can be different, with flow channels aligned parallel to the central axis alternating with flow channels positioned at an angle to the central axis.
- each flow channel has flow channel sections corresponding to the number of axial sections, which each extend along one of the axial sections.
- the flow channels all run from the gas inlet side to the gas outlet side of the catalytic converter.
- Each flow channel therefore runs through all axial sections of the catalytic converter. Since the honeycomb body is only created from a stack of layers in the axial direction, and therefore the metal foils are not interrupted, each flow channel extends through the axial sections without being interrupted by the transitions between the axial sections.
- the aim is to enable the highest possible flow through the honeycomb body, which is why as few flow channels as possible should be blocked. For manufacturing reasons, it can happen that individual flow channels are deformed and thus blocked. However, these cases are insignificant side effects that fundamentally do not change the function and structure of the honeycomb body.
- the flow channel sections of the axial section which begins on the gas inlet side of the honeycomb body, run parallel to the central axis of the honeycomb body and / or the flow channel sections of the axial section, which ends on the gas outlet side of the honeycomb body, run parallel to the central axis.
- a heating disk which is fixed with straight support pins inserted into the flow channels and permanently connected to them, can be positioned particularly easily relative to the catalytic converter.
- a preferred exemplary embodiment is characterized in that the flow direction of the respective flow channel sections is different relative to the central axis in axial sections that are directly adjacent to one another.
- the flow channels preferably have angles to the central axis that are between 1 and 15 degrees, particularly preferably between 1 and 10 degrees.
- a catalyst according to the invention preferably has a cell density of 600 cpsi to 1200 cpsi (cells per square inch).
- the length of the axial sections is between 5mm and 50mm along the central axis.
- the length of the axial sections is preferably between 5mm and 50mm.
- Axial sections with straight flow channel sections running parallel to the central axis on the gas inlet side and/or the gas outlet side preferably have a length of 5mm to 10mm. The short length of these axial sections ensures that during the gluing and soldering process the solder also penetrates well into the subsequent axial sections and thus a cohesive connection is created between the metal foils in the subsequent soldering process.
- Individual axial sections can additionally have a special corrugation, with the corrugation maximum or the corrugation minimum being cut and a protuberance of the metal foil in the opposite direction of the respective corrugation being provided.
- This allows exhaust gas to flow between adjacent flow channels.
- improved conversion on the catalyst can be achieved in this way, since the protuberance improves the gas flow, in particular making it more turbulent.
- the protuberances are particularly advantageous in combination with a heating disk attached to the catalytic converter, as they enable a multi-point soldering connection between the support pins and the catalytic converter.
- the protuberances can optionally be arranged in axial sections with flow channels running parallel to the central axis and/or in axial sections with flow channels set at an angle to the central axis.
- the protuberances are particularly preferably arranged in the region of the gas inlet side and particularly preferably the axial start of the protuberance is arranged in a range of 1 mm to 10 mm, particularly preferably in a range of 1 mm to 5 mm, after the gas inlet side.
- At least one metal foil has slits running in at least one axial section in the circumferential direction of the honeycomb body.
- the slots are preferably made into the metal foils before the corrugation process.
- the slots significantly reduce the material loads during the corrugation process and thus reduce the risk of damage to the metal foils.
- the slots can be arranged in the axial direction in straight axial sections or preferably at deflection points or transition points between axial sections with unequal alignment of the flow channel sections.
- the axial section adjacent to the gas inlet side has flow channel sections which run parallel to the central axis, with support pins being inserted into individual flow channels and permanently connected to the honeycomb body. This makes it particularly easier to connect a heating disk to the catalytic converter.
- the honeycomb body has alternating axial sections along its axial extent with a flow direction running parallel to the central axis and axial sections with a flow direction running at an angle to the central axis. This specifically increases the radius at the deflection points or the transitions between the axial sections, which relieves the load on the metal foils and thus also relieves the load on the honeycomb body.
- the honeycomb body is formed from a plurality of metal foils stacked on top of one another and wound around at least one pivot point. Furthermore, it is expedient if the transition between two directly adjacent axial sections each represents a deflection point for the flow direction of a flow channel. This ensures that the flow channels are not interrupted by the transitions between the axial sections.
- FIG. 1 shows a sectional view through a catalytic converter with a honeycomb body according to the invention
- FIG. 2 shows a detailed view of a special shape of a corrugated film, the corrugation having an area in the corrugation maximum that is turned out in the opposite direction,
- FIG. 3 shows a sectional view through a catalytic converter, showing a supporting catalytic converter to which a heating disk is connected to the gas inlet side by means of supporting pins,
- FIG. 4 shows a sectional view through a supporting catalytic converter and a heating disk, with an alternative configuration of the successive axial areas
- Fig. 5 shows a sectional view through a catalytic converter, the honeycomb body having circumferentially extending slots within individual of the axial sections
- Fig. 6 is a sectional view through a catalytic converter, the honeycomb body having circumferentially extending slots at the transitions between mutually adjacent axial sections.
- Figure 1 shows a catalytic converter 1, with the honeycomb body 2 being accommodated in a casing tube 3.
- the honeycomb body has several axial sections 4, 5 through which exhaust gas can flow from the gas inlet side 6 to the gas outlet side 7.
- alternating axial sections 5 with flow channel sections set at an angle to the central axis and axial sections 6 with flow channel sections running parallel to the central axis are shown.
- the axial sections 5 alternately have a positive angle of attack to the central axis and a negative angle of attack to the central axis, which creates an up and down movement of the flow channels along the axial extent of the honeycomb body 2 in the sectional view of Figure 1.
- Figure 2 shows a perspective view of a corrugated metal foil 8, the upwardly projecting wave maxima having protuberances 9, which are protruded from the corrugation in the opposite direction.
- the protruded areas 9 in turn have a smaller corrugation compared to the main corrugation.
- FIG. 3 shows an alternative embodiment of a honeycomb body 2.
- the honeycomb body On the gas inlet side, the honeycomb body is preceded by a heating slide 12, which is connected to the honeycomb body via support pins 11.
- the honeycomb body 5 has an axial section 4 with flow channel sections running parallel to the central axis on its gas inlet side and the gas outlet side.
- the remaining honeycomb body 2 is formed by axial sections 5, each of which has flow channel sections set at an angle.
- the axial sections 4 on the gas inlet side and the gas outlet side each have a significantly shorter axial extent than the middle axial sections 5.
- Figure 4 shows a honeycomb body 2 with an upstream heating disk 12.
- the axial sections 4 and 5 are arranged here alternately, so that starting with an axial section 4, an axial section 5 follows and so on until an axial section 4 follows again on the gas outlet side .
- the flow channels created in this way follow an up and down movement along the axial extent of the honeycomb body.
- Figure 5 shows a further alternative honeycomb body 2, with axial sections 5 and axial sections 4 being arranged alternately.
- the axial sections 4 now have additional slots 13 which run in the circumferential direction of the honeycomb body 2.
- the slots 13 are arranged centrally in the axial sections 4.
- Figure 6 shows a honeycomb body 2 as in Figure 5.
- the slots 13 are now arranged directly in the transitions between the axial areas 4 and 5.
- FIGS. 1 to 6 in particular do not have a restrictive character and serve to illustrate the idea of the invention.
- Reference symbol list
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022206950.1A DE102022206950A1 (de) | 2022-07-07 | 2022-07-07 | Katalysator zur Abgasnachbehandlung mit verbesserter Struktur |
| PCT/EP2023/068013 WO2024008577A1 (de) | 2022-07-07 | 2023-06-30 | Katalysator zur abgasnachbehandlung mit verbesserter struktur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4551800A1 true EP4551800A1 (de) | 2025-05-14 |
Family
ID=87136792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23737968.0A Withdrawn EP4551800A1 (de) | 2022-07-07 | 2023-06-30 | Katalysator zur abgasnachbehandlung mit verbesserter struktur |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260028928A1 (de) |
| EP (1) | EP4551800A1 (de) |
| CN (1) | CN119403999A (de) |
| DE (1) | DE102022206950A1 (de) |
| WO (1) | WO2024008577A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024108910A1 (de) * | 2024-03-28 | 2025-10-02 | Emitec Technologies GmbH | Wabenstruktur und Verfahren zur Herstellung einer strukturierten Lage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4382323A (en) * | 1980-07-10 | 1983-05-10 | General Motors Corporation | Method for manufacturing a wound foil structure comprising distinct catalysts |
| JPH03181338A (ja) * | 1989-12-11 | 1991-08-07 | Gebr Sulzer Ag | 触媒エレメントおよび触媒反応用反応器 |
| JP2722828B2 (ja) * | 1991-03-06 | 1998-03-09 | 日産自動車株式会社 | 内燃機関の排気フィルタ |
| US8057746B2 (en) * | 2007-05-02 | 2011-11-15 | Acr Co., Ltd. | Carrier for exhaust-gas purification and exhaust-gas purifier having the carrier |
| DE102011120720A1 (de) * | 2011-12-12 | 2013-06-13 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Stützstift für einen elektrisch beheizbaren Wabenkörper |
-
2022
- 2022-07-07 DE DE102022206950.1A patent/DE102022206950A1/de active Pending
-
2023
- 2023-06-30 WO PCT/EP2023/068013 patent/WO2024008577A1/de not_active Ceased
- 2023-06-30 CN CN202380047803.XA patent/CN119403999A/zh active Pending
- 2023-06-30 US US18/881,415 patent/US20260028928A1/en active Pending
- 2023-06-30 EP EP23737968.0A patent/EP4551800A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN119403999A (zh) | 2025-02-07 |
| WO2024008577A1 (de) | 2024-01-11 |
| US20260028928A1 (en) | 2026-01-29 |
| DE102022206950A1 (de) | 2024-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0458045B1 (de) | Metallträgermatrix für einen katalytischen Reaktor | |
| EP0386013B1 (de) | Katalysatoranordnung mit strömungsleitkörper | |
| EP0929738B1 (de) | Wabenkörper mit wärmeisolierung, vorzugsweise für einen abgaskatalysator | |
| DE102012007020A1 (de) | Elektrischer Anschluss von mehreren Blechlagen eines elektrisch beheizbaren Wabenkörpers und zugehöriger Wabenkörper | |
| DE2946804A1 (de) | Waermetauscher | |
| WO1998033593A1 (de) | Extrudierter wabenkörper, insbesondere katalysator-trägerkörper, mit verstärkter wandstruktur | |
| EP4551800A1 (de) | Katalysator zur abgasnachbehandlung mit verbesserter struktur | |
| EP4413241B1 (de) | Elektrisch beheizbarer wabenkörper mit welllagen unterschiedlicher zelldichte | |
| EP2250354B1 (de) | Wabenkörper mit flexiblen verbindungsstellen | |
| WO2001079670A1 (de) | Katalysator-trägrkörper mit manschette und verkürztem mantelrohr | |
| EP3464850B1 (de) | Wabenkörper für die abgasnachbehandlung | |
| EP3847348B1 (de) | Katalysator mit metallischem wabenkörper | |
| DE9315010U1 (de) | Trägerkörper für Abgas-Katalysatoren | |
| EP0969929A1 (de) | Wabenkörper, insbesondere katalysator-trägerkörper, mit verstärkter wandstruktur | |
| DE202007003597U1 (de) | Vorrichtung zur Abgasnachbehandlung | |
| DE102018216841B4 (de) | Partikelfilter | |
| DE102020121414A1 (de) | Abgasheizanordnung | |
| DE102022206145A1 (de) | Vorrichtung zur Erwärmung von in einer Abgasleitung strömbaren Abgas | |
| DE102022210017A1 (de) | Katalysator mit variabler Wellhöhe | |
| DE102021210776B3 (de) | Wabenkörper für einen Katalysator zur Abgasnachbehandlung und Verfahren zur Herstellung dieses | |
| DE19507385C2 (de) | Metallträger-Körper für Abgas- und Abluftreinigungsanlagen | |
| WO2024104884A1 (de) | Vorrichtung zur abgasnachbehandlung mit einer geschlitzten matrix | |
| DE102017203546A1 (de) | Katalysator mit elektrisch beheizbarer Heizscheibe | |
| WO2022117474A1 (de) | Katalysator zur abgasnachbehandlung | |
| DE102019213025A1 (de) | Katalysator zur Abgasnachbehandlung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250207 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20250819 |