DE102006020725A1 - Filter element for filtering exhaust gases from a diesel engine comprises a first group of channels having a hexagon cross-sectional shape and a second group of channels delimited by four channels of the first group - Google Patents
Filter element for filtering exhaust gases from a diesel engine comprises a first group of channels having a hexagon cross-sectional shape and a second group of channels delimited by four channels of the first group Download PDFInfo
- Publication number
- DE102006020725A1 DE102006020725A1 DE102006020725A DE102006020725A DE102006020725A1 DE 102006020725 A1 DE102006020725 A1 DE 102006020725A1 DE 102006020725 A DE102006020725 A DE 102006020725A DE 102006020725 A DE102006020725 A DE 102006020725A DE 102006020725 A1 DE102006020725 A1 DE 102006020725A1
- Authority
- DE
- Germany
- Prior art keywords
- channels
- group
- filter element
- filter
- walls
- 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- Withdrawn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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
- B01D39/2093—Ceramic foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
- B01D2239/0478—Surface coating material on a layer of the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
-
- 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
- F01N2330/06—Ceramic, e.g. monoliths
-
- 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
- F01N2330/10—Fibrous material, e.g. mineral or metallic wool
- F01N2330/101—Fibrous material, e.g. mineral or metallic wool using binders, e.g. to form a permeable mat, paper or the like
- F01N2330/102—Fibrous material, e.g. mineral or metallic wool using binders, e.g. to form a permeable mat, paper or the like fibrous material being fiber reinforced polymer made of plastic matrix reinforced by fine glass or in the form of a loose mass of filaments or fibers
-
- 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
- F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Materials (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
Stand der TechnikState of technology
Die Erfindung betrifft ein Filterelement, insbesondere für ein Abgassystem einer Brennkraftmaschine, nach dem Oberbegriff des Anspruchs 1.The The invention relates to a filter element, in particular for an exhaust system an internal combustion engine, according to the preamble of claim 1.
Aus
der
Dabei strömt das zu reinigende Abgas durch die Filterwände zwischen den Eintrittskanälen und den Austrittskanälen hindurch. Bei dem bekannten Filterelement lagern sich mit der Zeit an der stromaufwärts gelegenen Oberfläche der Filterwand Rußpartikel ab. Diese Rußpartikel führen zu einer Verringerung der Durchlässigkeit der Filterwand und in Folge dessen zu einer Erhöhung des Druckabfalls, der beim Durchtritt des Gasstroms durch die Filterwand auftritt. Entsprechend erhöht sich der sogenannte "Abgasgegendruck". Überschreitet dieser einen bestimmten Wert, wird der Filter regeneriert, indem die abgeschiedenen Rußpartikel verbrannt werden. Hierzu wird die Temperatur des Abgases, welches durch die Filtereinrichtung geleitet wird, erhöht, was wiederum durch die Einspritzung von zusätzlichem Kraftstoff bewirkt wird.there flows the exhaust gas to be cleaned through the filter walls between the inlet channels and the outlet channels therethrough. In the known filter element are deposited over time at the upstream located surface the filter wall soot particles from. These soot particles to lead to a reduction in permeability the filter wall and as a result to an increase in the pressure drop, the Passage of the gas flow through the filter wall occurs. Corresponding elevated the so-called "exhaust backpressure". exceeds this one particular value, the filter is regenerated by the separated soot particles to be burned. For this purpose, the temperature of the exhaust gas, which passed through the filter device increases, which in turn through the Injection of additional Fuel is effected.
Offenbarung der Erfindungepiphany the invention
Aufgabe der vorliegenden Erfindung ist es, die Aufnahmefähigkeit des Filterelements für Ruß und Asche zu erhöhen und dadurch den zusätzlichen Kraftstoffbedarf für die Regenerierung der Filtereinrichtung zu reduzieren. Gleichzeitig sollen Lebensdauer und die Beständigkeit gegen schnelle Temperaturänderungen des Filterelements erhöht werden und durch eine Reduktion des Abgasgegendrucks der Kraftstoffverbrauch der Brennkraftmaschine reduziert werden.task The object of the present invention is to increase the capacity of the filter element for soot and ash to increase and thereby the additional fuel requirement for the To reduce regeneration of the filter device. simultaneously should durability and durability against fast temperature changes of the filter element increases and by reducing exhaust backpressure fuel consumption the internal combustion engine can be reduced.
Die der Erfindung zugrundeliegende Aufgabe wird bei einem Filterelement, insbesondere zur Filterung von Abgasen einer Dieselbrennkraftmaschine, mit einer Eintrittsfläche und einer Austrittsfläche, mit einer Vielzahl von Eintrittskanälen und mit einer Vielzahl von Austrittskanälen, wobei die Eintrittskanäle und die Austrittskanäle durch Filterwände aus einem offenporigen Material getrennt sind, dadurch gelöst, die Eintrittskanäle im Querschnitt die Form eines Achtecks aufweisen, dass die Austrittskanäle jeweils von vier Eintrittskanälen begrenzt werden.The underlying the invention is in a filter element, in particular for filtering exhaust gases of a diesel internal combustion engine, with an entrance area and an exit surface, with a variety of entry channels and with a variety of exit channels, the entrance channels and the exit channels through filter walls are separated from an open-cell material, thereby solved, the inlet channels have the shape of an octagon in cross section, that the outlet channels respectively of four entrance channels be limited.
Vorteilhafte Wirkungenadvantageous effects
Die erfindungsgemäße Geometrie der Querschnitte von Eintrittskanälen und Austrittskanälen erlaubt es, innerhalb sehr weiter Grenzen das Verhältnis der Querschnittsflächen von dem einen Eintrittskanal zu den beiden Austrittskanälen in weiten Grenzen zu variieren. Das Gleiche gilt für das Verhältnis der Oberflächen der Filterwände, die den Eintrittskanal begrenzen und die Oberflächen der Filterwände, welche die Austrittskanäle begrenzen. Die genannten Verhältnisse sind wichtige Parameter zur konstruktiven Auslegung der Filterelemente. Des Weiteren erlaubt die erfindungsgemäße Geometrie der Querschnitte von Eintrittskanälen und Austrittskanälen den Aufbau eines Filterelements, das relativ unempfindlich gegen thermische Spannungen ist, die aus lokal unterschiedlichen Temperaturbelastungen herrühren.The inventive geometry the cross sections of inlet channels and outlet channels allowed it, within very wide limits, the ratio of the cross-sectional areas of the one inlet channel to the two outlet channels in wide To vary borders. The same applies to the ratio of the surfaces of the Filter walls, which limit the inlet channel and the surfaces of the filter walls, which the exit channels limit. The conditions mentioned are important parameters for constructive design of the filter elements. Furthermore, the geometry according to the invention allows the cross sections of entrance channels and exit channels the construction of a filter element that is relatively insensitive to thermal stresses that result from locally different temperature loads.
Des Weiteren ist die erfindungsgemäße Gestaltung der Querschnitte von Einlasskanälen und Auslasskanälen fertigungstechnisch gut zu beherrschen, was insbesondere bei der kostengünstigen Herstellung von Filtereinrichtungen mit einer Vielzahl von kleinen Eintrittskanälen und noch kleineren Austrittskanälen von großer wirtschaftlicher Bedeutung ist.Of Another is the design of the invention the cross sections of inlet channels and outlet channels good mastery of production technology, which is particularly true in the cost-effective production of filtering devices having a plurality of small inlet channels and even smaller outlet channels of great economic importance.
Es hat sich als besonders vorteilhaft erwiesen, wenn die Eintrittskanäle im Querschnitt die Form eines regelmäßigen Achtecks aufweisen. Dabei ist es möglich, dass alle vier Seiten des Achtecks gleich lang sind. Alternativ ist es auch möglich, dass jeweils eine kürzere Seite sich mit einer längeren Seite abwechselt.It has proved to be particularly advantageous when the inlet channels in cross section the shape of a regular octagon exhibit. It is possible that all four sides of the octagon are the same length. alternative it is also possible each one shorter Side up with a longer one Page alternates.
Weitere vorteilhafte Ausgestaltungen der Erfindung sehen vor, dass die Filterwände gekrümmt sind. Dabei ist es sowohl möglich, die Filterwände konkav und/oder konvex auszubilden. Durch das Krümmen der Filterwände wird die Steifigkeit des erfindungsgemäßen Filterelements in radialer Richtung verringert, so dass das Filterelement Temperaturschocks und Wärmespannungen besser aufnehmen kann.Further advantageous embodiments of the invention provide that the filter walls are curved. It is both possible the filter walls concave and / or convex form. By bending the filter walls is the rigidity of the filter element according to the invention in radial Direction decreases so that the filter element temperature shocks and thermal stresses can absorb better.
Es hat sich weiter als vorteilhaft erwiesen, wenn mindestens die stromaufwärts gelegene Oberfläche der Filterwände eine katalytische Beschichtung aufweist. Durch die große Oberfläche wird die katalytische Wirkung beispielsweise bei einer Regenerierung des Filterelements verstärkt.It has further proven to be advantageous if at least the upstream surface the filter walls having a catalytic coating. Due to the large surface is the catalytic effect, for example during regeneration reinforced the filter element.
Besonders vorteilhaft ist es, wenn mindestens die stromaufwärts gelegene Oberfläche der Filterwand eine katalytische Beschichtung aufweist. Durch die große Oberfläche wird die katalytische Wirkung beispielsweise bei einer Regenerierung der Filtereinrichtung verstärkt.It is particularly advantageous if at least the upstream surface of the filter wall has a catalytic coating. Due to the large surface, the catalytic We kung amplified, for example, in a regeneration of the filter device.
Die erfindungsgemäßen Filterelemente können vorteilhafter Weise durch Extrudieren eines keramischen Werkstoffs, bevorzugt Cordierit oder Siliziumcarbid, oder aus Sintermetall hergestellt werden.The filter elements according to the invention can advantageously by extruding a ceramic material, preferably cordierite or silicon carbide, or made of sintered metal become.
Alternativ ist es auch möglich, das Filterelement aus einer Vielzahl von übereinander gestapelten Lagen vorgeformter Flachmaterialien herzustellen.alternative it is also possible the filter element of a plurality of stacked layers preformed flat materials.
Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Zeichnung, deren Beschreibung und den Patentansprüchen entnehmbar. Alle in der Zeichnung, deren Beschreibung und den Patentansprüchen beschriebenen Merkmale können sowohl einzeln als auch in beliebiger Kombination miteinander erfindungswesentlich sein.Further Advantages and advantageous embodiments of the invention are the subsequent drawing, the description and the claims can be removed. All described in the drawing, the description and the claims Features can both individually and in any combination with each other invention essential be.
Kurze Beschreibung der ZeichnungenShort description of drawings
Es zeigen:It demonstrate:
Ausführungsformen der Erfindungembodiments the invention
In
Die
Filtereinrichtung
In
Das
Filterelement
Parallel
zu einer Längsachse
Der
Strömungsweg
des ungereinigten Abgases führt
also in einen der Eintrittskanäle
Durch
Umkehren der Strömungsrichtung
des Abgases wird die Fläche
In
den
In
Bei
dem Ausführungsbeispiel
gemäß
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006020725A DE102006020725A1 (en) | 2006-05-04 | 2006-05-04 | Filter element for filtering exhaust gases from a diesel engine comprises a first group of channels having a hexagon cross-sectional shape and a second group of channels delimited by four channels of the first group |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006020725A DE102006020725A1 (en) | 2006-05-04 | 2006-05-04 | Filter element for filtering exhaust gases from a diesel engine comprises a first group of channels having a hexagon cross-sectional shape and a second group of channels delimited by four channels of the first group |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006020725A1 true DE102006020725A1 (en) | 2007-11-08 |
Family
ID=38564826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006020725A Withdrawn DE102006020725A1 (en) | 2006-05-04 | 2006-05-04 | Filter element for filtering exhaust gases from a diesel engine comprises a first group of channels having a hexagon cross-sectional shape and a second group of channels delimited by four channels of the first group |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006020725A1 (en) |
-
2006
- 2006-05-04 DE DE102006020725A patent/DE102006020725A1/en not_active Withdrawn
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Date | Code | Title | Description |
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R012 | Request for examination validly filed | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B01D0046240000 Ipc: F01N0003022000 |
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R012 | Request for examination validly filed |
Effective date: 20130118 |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B01D0046240000 Ipc: F01N0003022000 Effective date: 20130206 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |