DE102007053084A1 - Filter element for filtering i.e. exhaust gases of diesel internal-combustion engine, has inlet channels and/or outlet channels limited by filter walls, where inlet channels and outlet channels are arranged in radial outer area of element - Google Patents
Filter element for filtering i.e. exhaust gases of diesel internal-combustion engine, has inlet channels and/or outlet channels limited by filter walls, where inlet channels and outlet channels are arranged in radial outer area of element Download PDFInfo
- Publication number
- DE102007053084A1 DE102007053084A1 DE102007053084A DE102007053084A DE102007053084A1 DE 102007053084 A1 DE102007053084 A1 DE 102007053084A1 DE 102007053084 A DE102007053084 A DE 102007053084A DE 102007053084 A DE102007053084 A DE 102007053084A DE 102007053084 A1 DE102007053084 A1 DE 102007053084A1
- Authority
- DE
- Germany
- Prior art keywords
- filter element
- channels
- filter
- longitudinal axis
- 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- Withdrawn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
- 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
- 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
- F01N2330/30—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
- 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
-
- 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
Abstract
Description
Stand der TechnikState of the art
Die Erfindung betrifft ein Filterelement zur Reinigung der Abgase einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1 und einen Rußfilter mit einem Filterelement nach dem nebengeordneten Anspruch 7. Derartige Filterelemente werden beispielsweise als Rußfilter für Dieselbrennkraftmaschinen eingesetzt.The The invention relates to a filter element for cleaning the exhaust gases of a Internal combustion engine according to the preamble of claim 1 and a soot filter with a filter element according to the independent claim 7. Such Filter elements are used, for example, as a soot filter for Diesel engine used.
Die Filterelemente bestehen häufig aus einem keramischen Werkstoff und weisen eine Vielzahl von parallel zueinander verlaufenden Eintrittskanälen und Austrittskanälen mit quadratischem oder rechteckigem Querschnitt auf.The Filter elements often consist of a ceramic material and have a plurality of mutually parallel inlet channels and Outlet channels with square or rectangular cross section on.
Häufig werden solche Filterelemente aus keramischen Werkstoffen durch Extrudieren hergestellt. Dies bedeutet, dass der Rohling des Filterelements ein prismatischer Körper mit einer Vielzahl von parallel zueinander verlaufenden Kanälen ist. Die Kanäle eines Rohlings sind zunächst an beiden Enden offen.Often Such filter elements are made of ceramic materials by extrusion produced. This means that the blank of the filter element a prismatic body with a plurality of parallel to each other extending channels. The channels of a blank are initially open at both ends.
Damit das zu reinigende Abgas durch die Wände des Filters strömt und dort gefiltert wird, wird ein Teil der Kanäle am hinteren Ende des Filterelements verschlossen, während ein anderer Teil der Kanäle am vorderen Ende des Filterelements verschlossen wird. Dadurch werden zwei Gruppen von Kanälen gebildet, nämlich die sogenannten Eintrittskanäle, welche am hinteren Ende verschlossen sind und die sogenannten Austrittskanäle, welche am Anfang des Filterelements verschlossen sind.In order to the exhaust gas to be cleaned flows through the walls of the filter and filtered there, some of the channels will be at the back End of the filter element closed while another Part of the channels closed at the front end of the filter element becomes. This forms two groups of channels, namely the so-called entry channels, which are closed at the rear end and the so-called exit channels, which are closed at the beginning of the filter element.
Zwischen den Eintrittskanälen und den Austrittskanälen besteht nur über die porösen Wände des Filterelements eine Strömungsverbindung, so dass das Abgas das Filterelement nur durchströmen kann, indem es aus den Eintrittskanälen durch die Wände des Filterelements hindurch in die Austrittskanäle strömt.Between the inlet channels and the outlet channels exists only over the porous walls of the Filter element, a flow connection, so that the exhaust gas the filter element can only flow through it by the Entrance channels through the walls of the filter element passes through into the outlet channels.
Bei der Regeneration der Filterelemente werden die Rußablagerungen oxidiert, wobei Wärme freigesetzt wird. Da sich im Inneren des Filterelements mehr Ruß ablagert als an dessen Peripherie und außerdem die Wärmeabfuhr an der Peripherie des Filterelements besser ist als im Inneren desselben, treten vor allem bei der Regeneration des Filterelements lokale Temperaturunterschiede auf, die zu Wärmespannungen innerhalb des Filterelements fahren.at The regeneration of the filter elements are the soot deposits oxidized, releasing heat. As is inside the filter element deposits more soot than at the periphery and In addition, the heat dissipation at the periphery of Filter element is better than the interior of the same, occur mainly in the regeneration of the filter element local temperature differences on, which drive to thermal stresses within the filter element.
Wenn die Wärmespannungen zu groß werden, entstehen Risse im Filterelement, die zu einem Versagen desselben führen.If the thermal stresses become too large arise Cracks in the filter element that cause it to fail.
Aus
der
Der Erfindung liegt die Aufgabe zugrunde, ein Filterelement und einen Rußfilter mit verbesserter Temperaturbeständigkeit bereitzustellen. Außerdem soll bei den erfindungsgemäßen Gegenständen die Häufigkeit von wärmeinduzierten Spannungsrissen verringert werden. Schließlich soll das erfindungsgemäße Filterelement eine höhere volumenbezogene Speicherkapazität für Rußpartikel als das aus dem Stand der Technik bekannte Filterelement aufweisen.Of the Invention is based on the object, a filter element and a Soot filter with improved temperature resistance provide. It should also in the inventive Objects the frequency of heat-induced Stress cracks are reduced. Finally, that should filter element according to the invention a higher Volume-related storage capacity for soot particles as the filter element known from the prior art.
Diese Aufgabe wird erfindungsgemäß bei einem Filterelement zur Filterung von Ruß mit einer parallel zur Hauptströmungsrichtung des Abgases verlaufenden Längsachse, mit einer Vielzahl zur parallel zur Längsachse verlaufenden Einlasskanälen und einer Vielzahl von parallel zur Längsachse verlaufenden Auslasskanälen, wobei die Einlasskanäle und die Auslasskanäle durch mehrere Filterwände begrenzt werden, wobei in einem radial äußeren Bereich des Querschnittsanteils der Filterwände radial zur Längsachse des Filterelements verläuft und wobei in dem radial äußeren Bereich des Querschnitts ein Teil der Filterwände konzentrisch zu der Langsachse des Filterelements verläuft, dadurch gelöst, dass auch im radial äußeren Bereich des Filterelements Einlasskanäle und Auslasskanäle ausgebildet sind.These Task is according to the invention in a filter element for filtering soot with a parallel to the main flow direction the exhaust gas extending longitudinal axis, with a plurality to the parallel to the longitudinal axis extending inlet channels and a plurality of parallel to the longitudinal axis Outlet channels, wherein the inlet channels and the Exhaust ports bounded by multiple filter walls be, being in a radially outer region the cross-sectional portion of the filter walls radially to the longitudinal axis the filter element extends and wherein in the radially outer Area of the cross-section of a part of the filter walls concentric to the longitudinal axis of the filter element, thereby solved that also in the radially outer area of the filter element inlet channels and outlet channels are formed.
Durch die erfindungsgemäße Anordnung im äußeren Bereich des Filterelements und gleichzeitiger Ausbildung der dadurch gebildeten Kanäle zu Einlass- und Auslasskanälen ist es möglich, die gesamte Querschnittsfläche des Filterelements für die Rußfilterung zu nutzen. Dadurch wird der Platzbedarf des erfindungsgemäßen Filterelements bei vorgegebener Filterfläche bzw. Abscheiderate minimiert und naturgemäß dadurch die Herstellungs- und Materialkosten ebenfalls minimiert.By the inventive arrangement in the outer Area of the filter element and at the same time training the thereby formed channels to inlet and outlet channels it is possible to use the entire cross-sectional area to use the filter element for the Rußfilterung. As a result, the space requirement of the invention Filter element at a given filter area or deposition rate minimized and, by its nature, the production and material costs also minimized.
Durch die erfindungsgemäße radiale und konzentrische Anordnung der Filterwände im äußeren Bereich des Filterelements ist es überraschenderweise möglich gewesen, die aufgrund der ungleichmäßigen radialen Temperaturverteilung bei der Regeneration der Rußfilter der Filterelemente entstehenden temperaturinduzierten Spannungen zu reduzieren. In Folge dessen hat sich die Wahrscheinlichkeit des Versagens durch Risse, insbesondere von sogenannten „ring off cracks", deutlich verringert.By the inventive radial and concentric Arrangement of the filter walls in the outer Area of the filter element, it is surprisingly possible been due to the uneven radial Temperature distribution during the regeneration of the soot filters the filter elements resulting temperature-induced voltages to reduce. As a result, the likelihood of Failure due to cracks, especially from so-called "ring off cracks ", significantly reduced.
Durch die erfindungsgemäße Ausgestaltung des Filterelements ist es auch möglich, die Regenerationsintervalle zu verlängern und auch unter vergleichsweise ungünstigen Betriebsbedingungen durchzuführen, ohne dass die Gefahr einer Beschädigung des erfindungsgemäßen Filterelements besteht.The inventive design of the filter element, it is also possible, the rain Extend rationintervalle and perform even under relatively unfavorable operating conditions, without the risk of damage to the filter element according to the invention.
Das erfindungsgemäße Filterelement hat verglichen mit den aus dem Stand der Technik bekannten Filterelementen keine erhöhten Herstellungskosten, so dass die Umsetzung der Erfindung in ein Serienprodukt ohne Zusatzkosten möglich ist.The Filter element according to the invention has compared none known with the filter elements known from the prior art increased production costs, so that the implementation of Invention in a series product without additional costs possible is.
Besonders vorteilhafte Ausgestaltungen der Erfindung sehen vor, dass ein Teil der Filterelemente konzentrische Kreise um die Längsachse des Filterelements bilden. Dadurch ist eine besonders große „Weichheit" der Struktur des Filterelements in radialer Richtung gegeben, was die Beständigkeit des Filterelements gegen temperaturinduzierte mechanische Spannungen weiter verbessert.Especially advantageous embodiments of the invention provide that a part the filter elements concentric circles about the longitudinal axis form the filter element. This is a particularly large "softness" the structure of the filter element in the radial direction given what the resistance of the filter element to temperature induced mechanical stresses further improved.
Ein ähnlicher Effekt kann weiter dadurch erreicht werden, dass die Filterelemente von zwei benachbarten Kanälen versetzt zueinander verlaufen. Diese Maßnahme ist besonders vorteilhaft im Zusammenhang mit radial verlaufenden Filterwänden, da die Steifigkeit der Filterelemente in radialer Richtung bei radial verlaufenden Filterelementen oft größer als gewünscht ist.A similar one Effect can be further achieved by the fact that the filter elements from two adjacent channels offset from each other. These Measure is particularly advantageous in connection with radially extending filter walls, since the stiffness of Filter elements in the radial direction with radially extending filter elements often larger than desired.
Es hat sich als vorteilhaft erwiesen, wenn in einem inneren Bereich des Querschnitts die Einlasskanäle und Auslasskanäle einen rechteckigen, quadratischen und/oder parallelogrammförmigen Querschnitt aufweisen. Dadurch ist es möglich, dass die hydraulischen Querschnitte von Einlasskanälen und Auslasskanälen etwa gleich sind und die Wandstärken der Filterwände ebenfalls über den gesamten Querschnitt mindestens des inneren Bereichs konstant sind. Dadurch wird eine vergleichsweise gleichmäßige Durchströmung des inneren Bereichs des Filterelements gewährleistet und die Ausnutzung der Filterwände für die bezüglich der Filterung von Rußpartikeln wird vergleichmäßigt.It has proven to be beneficial when in an interior area of the cross section, the inlet channels and outlet channels a rectangular, square and / or parallelogram Have cross-section. This makes it possible for the hydraulic Cross sections of inlet channels and outlet channels are about the same and the wall thicknesses of the filter walls also over the entire cross-section of at least the inner area are constant. This will be a comparatively uniform flow through the inner Ensured area of the filter element and the utilization the filter walls for the respect Filtering of soot particles is made uniform.
Selbstverständlich können auch die im äußeren Bereich vorhandenen Kanäle einen parallelogrammförmigen oder annährend quadratischen bzw. rechteckigen Querschnitt aufweisen.Of course can also be present in the outer area Channels a parallelogram or near have square or rectangular cross-section.
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 genannten Vorteile 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 removable. All in the drawing, the description and the claims mentioned advantages can be both individually and in any combination be essential to the invention with each other.
Zeichnungendrawings
Es zeigen:It demonstrate:
Ausführungsformen der Erfindungembodiments the invention
An
das Gehäuse
Das
Filterelement
Damit
das Abgas durch die Filterwände (ohne Bezugszeichen in
Eine
Längsachse
Im
inneren Bereich
In
dem äußeren Bereich
Wenn
die Filterwände
Dadurch,
dass im äußeren Bereich
Durch
die erfindungsgemäße Ausgestaltung der Eintrittskanäle
In
Im äußeren
Bereich
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102005045015 A1 [0008] DE 102005045015 A1 [0008]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007053084A DE102007053084A1 (en) | 2007-11-07 | 2007-11-07 | Filter element for filtering i.e. exhaust gases of diesel internal-combustion engine, has inlet channels and/or outlet channels limited by filter walls, where inlet channels and outlet channels are arranged in radial outer area of element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007053084A DE102007053084A1 (en) | 2007-11-07 | 2007-11-07 | Filter element for filtering i.e. exhaust gases of diesel internal-combustion engine, has inlet channels and/or outlet channels limited by filter walls, where inlet channels and outlet channels are arranged in radial outer area of element |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007053084A1 true DE102007053084A1 (en) | 2009-05-14 |
Family
ID=40530486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007053084A Withdrawn DE102007053084A1 (en) | 2007-11-07 | 2007-11-07 | Filter element for filtering i.e. exhaust gases of diesel internal-combustion engine, has inlet channels and/or outlet channels limited by filter walls, where inlet channels and outlet channels are arranged in radial outer area of element |
Country Status (1)
Country | Link |
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DE (1) | DE102007053084A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2527024A4 (en) * | 2010-01-19 | 2015-05-27 | Sumitomo Chemical Co | Honeycomb structure |
WO2019191354A1 (en) * | 2018-03-29 | 2019-10-03 | Corning Incorporated | Honeycomb bodies with varying cell densities and extrusion dies for the manufacture thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005045015A1 (en) | 2005-09-21 | 2007-03-29 | Robert Bosch Gmbh | Filter element and soot filter with improved thermal shock resistance |
-
2007
- 2007-11-07 DE DE102007053084A patent/DE102007053084A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005045015A1 (en) | 2005-09-21 | 2007-03-29 | Robert Bosch Gmbh | Filter element and soot filter with improved thermal shock resistance |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2527024A4 (en) * | 2010-01-19 | 2015-05-27 | Sumitomo Chemical Co | Honeycomb structure |
WO2019191354A1 (en) * | 2018-03-29 | 2019-10-03 | Corning Incorporated | Honeycomb bodies with varying cell densities and extrusion dies for the manufacture thereof |
US11813597B2 (en) | 2018-03-29 | 2023-11-14 | Corning Incorporated | Honeycomb bodies with varying cell densities and extrusion dies for the manufacture thereof |
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R005 | Application deemed withdrawn due to failure to request examination | ||
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Effective date: 20141108 |