EP4619624A1 - Stützstruktur für eine heizmatrix - Google Patents
Stützstruktur für eine heizmatrixInfo
- Publication number
- EP4619624A1 EP4619624A1 EP23809167.2A EP23809167A EP4619624A1 EP 4619624 A1 EP4619624 A1 EP 4619624A1 EP 23809167 A EP23809167 A EP 23809167A EP 4619624 A1 EP4619624 A1 EP 4619624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support structure
- ring
- struts
- matrix
- housing
- 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.)
- Pending
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
- F01N3/18—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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- 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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
- F01N13/1844—Mechanical joints
- F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
-
- 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
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
-
- 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
-
- 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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
Definitions
- the invention relates to a support structure for positioning a heating matrix in an exhaust gas path spatially delimited by a housing, wherein the heating matrix is formed by a honeycomb body which has a plurality of flow channels through which flow can take place along a main flow direction, wherein the heating matrix is supported relative to the inner surface of the housing by the support structure and the matrix is fixed relative to the support structure by means of a plurality of coupling elements.
- Electric heating elements are now regularly used to heat exhaust gases in an exhaust system downstream of a combustion engine or the exhaust gases flowing in an exhaust system.
- the aim here is to reach a temperature threshold more quickly, at which an effective conversion of the pollutants carried in the exhaust gas can take place. This is necessary because the catalytically active surfaces of the catalysts installed in the exhaust system used for exhaust gas aftertreatment only allow sufficient conversion of the respective pollutants at a minimum temperature, the so-called light-off temperature.
- heating catalysts which have a metallic structure connected to a voltage source or a metallically coated ceramic structure which can be heated by utilizing the ohmic resistance.
- the heatable metallic structures can, for example, consist of a honeycomb body made of metal foils.
- a plurality of smooth and/or at least partially structured metal foils are stacked on top of each other and wound around at least one pivot point to form a honeycomb body.
- the matrix formed from the metal foils can be electrically contacted and heated using the ohmic resistance.
- the matrix must be arranged in an exhaust gas line and be located upstream or downstream of a catalyst designed for exhaust gas aftertreatment in the flow direction of the exhaust gas.
- a support In order to position the matrix in the exhaust system and to support it in particular against mechanical and thermal loads, a support must be provided which can withstand in particular the high thermal cycling loads and also the strong and irregular mechanical loads which occur in an exhaust system, in particular the exhaust system of a motor vehicle.
- a support structure for a heating matrix for spatial positioning of the heating matrix in an exhaust gas path which has a simplified structure and has improved properties with regard to support against mechanical and thermal disturbances.
- An embodiment of the invention relates to a support structure for positioning a heating matrix in an exhaust gas path spatially delimited by a housing, wherein the heating matrix is formed by a honeycomb body which has a plurality of flow channels through which flow can pass along a main flow direction, wherein the heating matrix is supported relative to the inner surface of the housing by the support structure and the matrix is fixed relative to the support structure by means of a plurality of coupling elements, wherein the support structure is designed in several parts, wherein the support structure has at least one central ring-like element and a plurality of struts which protrude in the radial direction from the ring-like element and run to the inner surface of the housing.
- the support structure is used in particular for the permanent positioning of the heating matrix in the housing of the exhaust system. This must withstand the vibrations and thermal loads and securely fix the heating matrix within the housing. Since the heating matrix is energized during operation and contact with the housing must be avoided in order to avoid a short circuit or endangering people, structural failure of the support structure must be ruled out.
- connection of the support structure to the inner surface of the housing must be designed to be particularly stable and rigid in order to ensure a secure hold.
- the struts towards the ring-like element must have increased elasticity in order to compensate for the thermally induced stresses.
- fastening points for the coupling elements must be arranged on the support structure in such a way that sufficient tolerance compensation can be ensured during assembly.
- the support structure is made up of several components, which may have different material properties, in particular different thermal expansion coefficients. It is particularly advantageous if the ring-like element has at least one web that connects two points of the ring-like element to one another. Additional stabilization of the ring-like element can be achieved via such a web that runs through the center of the ring-like element or at least close to the center. In addition, such a web also offers the possibility of arranging coupling elements in the area of the center of the support structure without causing too great a pressure loss for the exhaust gas flow.
- the ring-like element is made from a punched sheet or a sheet cut with a laser.
- a preferred embodiment is characterized in that the struts are made from a punched sheet or a sheet cut with a laser. The aforementioned methods make it particularly easy to produce precisely fitting components.
- the ring-like element and the die are connected to one another using a durable joining process from the group of laser welding, soldering or welding. Due to the high thermal loads in particular, a joining process should be selected that allows a secure, durable connection under the given loads.
- the struts are made of profiled sheets, whereby the struts have a higher section modulus in the axial direction, which corresponds to the main flow direction of the exhaust gas line, compared to the radial direction.
- Profiled sheets can be used to achieve a direction-dependent strength of the components, so that they can specifically absorb higher section moduli in one spatial direction and can therefore be manufactured to suit the application.
- the struts are curved and evenly distributed in the circumferential direction of the housing.
- a plurality of struts is required for the secure positioning of the ring-like element.
- the struts are arranged at equal distances from each other in the circumferential direction of the housing.
- the support structure has a plurality of coupling elements via which the matrix is attached to the support structure, wherein the coupling elements are arranged both on the struts and on the ring-like central element.
- the coupling elements serve to accommodate the heating matrix and are preferably designed in such a way that they can compensate for tolerances.
- Fig. 1 is a view of a support structure consisting of a ring-like element with a plurality of struts projecting in the radial direction.
- Figure 1 shows a support structure 1 which is formed from a centrally arranged ring-like element 3 and a plurality of struts 2.
- the ring-like element 3 has an S-shaped web 4 which connects two points of the ring-like element 3 to one another.
- the struts 2 protrude from the ring-like element 3 in a radial direction outwards and are connected at their free end to the housing (not shown) or to another ring-like element (also not shown).
- the struts 2 are arranged omnidistantly in the circumferential direction of the ring-like element. mentes 3 and are curved in shape.
- the distances in the circumferential direction can also be different.
- the struts 2 can also be straight or have a different shape.
- additional connecting elements can be provided which, for example, connect the individual struts 2 to one another.
- These can be evenly or unevenly distributed and can connect two or more struts with each other.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022212259.3A DE102022212259B3 (de) | 2022-11-17 | 2022-11-17 | Stützstruktur für eine Heizmatrix |
| PCT/EP2023/082089 WO2024105179A1 (de) | 2022-11-17 | 2023-11-16 | Stützstruktur für eine heizmatrix |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4619624A1 true EP4619624A1 (de) | 2025-09-24 |
Family
ID=88863451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23809167.2A Pending EP4619624A1 (de) | 2022-11-17 | 2023-11-16 | Stützstruktur für eine heizmatrix |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4619624A1 (de) |
| CN (1) | CN120187939A (de) |
| DE (1) | DE102022212259B3 (de) |
| WO (1) | WO2024105179A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10137878A1 (de) | 2001-08-02 | 2003-02-27 | Emitec Emissionstechnologie | Abgaskatalysator mit Dehnungen ausgleichender Lagerung |
| DE102019131556A1 (de) * | 2019-11-22 | 2021-05-27 | Eberspächer Exhaust Technology GmbH | Abgasheizer |
| EP4047195A1 (de) * | 2021-02-11 | 2022-08-24 | Benteler Automobiltechnik GmbH | Halter für ein elektrisches heizelement in einer abgasnachbehandlungsvorrichtung |
| DE102021205198A1 (de) * | 2021-05-20 | 2022-11-24 | Vitesco Technologies GmbH | Vorrichtung zur Erwärmung eines Abgasstroms |
| DE102021122681A1 (de) * | 2021-09-02 | 2023-03-02 | Purem GmbH | Abgasheizer |
-
2022
- 2022-11-17 DE DE102022212259.3A patent/DE102022212259B3/de active Active
-
2023
- 2023-11-16 WO PCT/EP2023/082089 patent/WO2024105179A1/de not_active Ceased
- 2023-11-16 CN CN202380079840.9A patent/CN120187939A/zh active Pending
- 2023-11-16 EP EP23809167.2A patent/EP4619624A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022212259B3 (de) | 2024-01-25 |
| CN120187939A (zh) | 2025-06-20 |
| WO2024105179A1 (de) | 2024-05-23 |
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Legal Events
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 20250617 |
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| AK | Designated contracting states |
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