WO2009112384A2 - Dispositif de filtrage notamment destiné à un système de gaz d'échappement d'un moteur à combustion interne - Google Patents

Dispositif de filtrage notamment destiné à un système de gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
WO2009112384A2
WO2009112384A2 PCT/EP2009/052395 EP2009052395W WO2009112384A2 WO 2009112384 A2 WO2009112384 A2 WO 2009112384A2 EP 2009052395 W EP2009052395 W EP 2009052395W WO 2009112384 A2 WO2009112384 A2 WO 2009112384A2
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter element
channels
outlet
cross
Prior art date
Application number
PCT/EP2009/052395
Other languages
German (de)
English (en)
Other versions
WO2009112384A3 (fr
Inventor
Tobias Hoeffken
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009112384A2 publication Critical patent/WO2009112384A2/fr
Publication of WO2009112384A3 publication Critical patent/WO2009112384A3/fr

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
    • F01N2330/32—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
    • F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section
    • 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

Definitions

  • Filter device in particular for an exhaust system of an internal combustion engine
  • the invention relates to a filter element, in particular for an exhaust system of an internal combustion engine, according to the preamble of claim 1 and a filter device with a filter element according to the independent claim. 7
  • a filter element having an entry surface and an exit surface, having a plurality of inlet channels and having a plurality of outlet channels, the inlet channels and the outlet channels having a hexagonal cross section, and wherein the inlet channels and the outlet channels are separated by a filter wall of an open-pore material.
  • Filter elements are often made of a ceramic material and are usually produced by extrusion. This means that the blank of the filter element is a prismatic body with a plurality of mutually parallel channels. The channels of a blank are initially open at both ends.
  • the invention has for its object to provide further improved geometries of the filter elements, which has advantages over the prior art in terms of soot loading, temperature distribution in the regeneration and manufacturing.
  • a filter element in particular for filtering exhaust gases of a diesel internal combustion engine, with an inlet surface and with an outlet surface, with a plurality of inlet channels and with a plurality of outlet channels, wherein the inlet channels and the outlet channels through filter walls made of an open-cell material are separated and where the cross-sectional areas of all
  • Inlet channels is greater than the cross-sectional area of all outlet channels and wherein the filter element is composed in cross section of a plurality of hexagonal unit cells, achieved in that at the corners and in the center of the unit cells outlet channels are arranged, and that between two adjacent and arranged at the corners outlet channels at least one first filter wall is provided.
  • the inventive design of the channels of the filter element allows a greater asymmetry of the ratio of the cross-sectional areas of the inlet channels to the cross-sectional areas of the outlet channels, without causing the flow resistance of the outlet channels increases too much. Due to the enlarged in the filter element according to the invention surfaces of the inlet channels, the storage capacity for ashes increases, which has a positive effect on the life of the filter element.
  • the relationship between the number of inlet channels and the number of outlet channels can be further controlled by the fact that, starting from a concentric to the
  • a further advantageous embodiment of the invention provides that the outlet channels have a circular or polygonal cross-section.
  • a particularly advantageous embodiment of the invention provides that the cross section of a filter element is composed of several embodiments of unit cells according to the invention. This makes it possible, for example, to provide different channel geometries in the center of the filter element than at the periphery of the filter element. In this way, the different soot loading and the different flow and pressure conditions over the cross section of the filter element can be taken into account. Further advantages and advantageous embodiments of the invention are the following drawings, the description and the claims removable. All features disclosed in the drawing, the description and the claims can be essential to the invention both individually and in any combination with one another.
  • Figure 1 is a schematic representation of an internal combustion engine with an exhaust aftertreatment device according to the invention
  • Figure 2 shows a filter element according to the invention in longitudinal section
  • Figures 3 to 8 are cross-sections through embodiments of inventive filter elements.
  • an internal combustion engine carries the reference numeral 10.
  • the exhaust gases are discharged via an exhaust pipe 12, in which a filter device 14 is arranged.
  • soot particles are filtered out of the exhaust gas flowing in the exhaust pipe 12.
  • the filter device 14 comprises a prismatic, in particular cylindrical housing 16, in which a rotationally symmetrical, in the present exemplary embodiment, a likewise cylindrical filter element 18 is arranged.
  • FIG. 2 shows a longitudinal section through a filter element 18 according to the invention.
  • the filter element 18 can, for example, be produced as an extruded shaped body from a ceramic material, for example cordierite.
  • the filter element 18 is flowed through in the direction of the arrows 20 of not shown exhaust gas.
  • An entrance surface has the reference numeral 22 in FIG. 2, while an exit surface in FIG. 2 has the reference numeral 24.
  • Parallel to a longitudinal axis 26 of the filter element 18 extend a plurality of inlet channels 28 in alternation with outlet channels 30.
  • the inlet channels 28 are closed at the outlet surface 24.
  • the sealing plugs are shown in FIG. 2 without reference numerals.
  • the outlet channels 30 are closed at the entry surface 22.
  • the cross section of the filter element 18 is composed of hexagonal unit cells whose boundary is shown in FIG.
  • FIG. 3a an embodiment of a unit cell 35 according to the invention, whose limit is indicated by a dashed line 33, shown greatly enlarged.
  • the unit cell 35 has six corners 37, of which only two have been provided with reference numerals in FIG. 3a. Furthermore, the unit cell 35 has a center 39.
  • a circular outlet channel 30 is present at each corner 37 and at the center 39 of the unit cell 35.
  • a first filter wall 31.1 is present between the concentric with the corners 37 arranged outlet channels 30, a first filter wall 31.1 is present.
  • the first filter walls 31.1 connect the filter walls 31 belonging to the outlet channels 30 by the shortest route. In the exemplary embodiment shown, they run on the boundary line 33 of the unit cell 35.
  • a total of six second filter walls 31. 2 are provided which run radially and respectively connect the filter walls 31 of the outlet channel 30 arranged in the center 39 with the filter walls 31 of the outlet channels 30 arranged at the corners 37 of the unit cell.
  • the number of second filter walls 31.2 can be increased.
  • the number of second filter walls 31.2 carries seven, eight and nine. This results in correspondingly different ratios between the number of inlet channels and the number of outlet channels.
  • the first filter walls 31. 1 unlike in the previous exemplary embodiments, are not straight, but have a kink 41.
  • the first filter walls 31.1 do not run on the boundary line 33, so that by joining together a plurality of inventive unit cells also still another outlet channel 30.1 forms, which has an approximately diamond-shaped cross-section.
  • an outlet channel 30.1 with a diamond-shaped cross section is shown in the lower left part of FIG.
  • the first filter walls 31.1 likewise have a kink and the radially extending second filter walls 31.2 terminate in the kink 41 of the first filter walls 31.1. Also, the ratio of the inlet cross sections and the outlet cross sections and the hydraulic diameter is changed again.
  • the filter elements 18 according to the invention can be composed of unit cells 35 with the same topology or composed of unit cells 35 with different topologies. This makes it possible, for example, to take into account the different temperature and flow and pressure conditions over the cross section of the filter element 18. This results in a more uniform soot loading of the filter element according to the invention and thus an improved performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un élément de filtrage dont la section transversale est composée de cellules unitaires hexagonales (35) comportant des canaux d'entrée (28) et des canaux de sortie (30).
PCT/EP2009/052395 2008-03-14 2009-02-27 Dispositif de filtrage notamment destiné à un système de gaz d'échappement d'un moteur à combustion interne WO2009112384A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000688.2 2008-03-14
DE102008000688A DE102008000688A1 (de) 2008-03-14 2008-03-14 Filtereinrichtung, insbesondere für ein Abgassystem einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
WO2009112384A2 true WO2009112384A2 (fr) 2009-09-17
WO2009112384A3 WO2009112384A3 (fr) 2009-11-12

Family

ID=40952783

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/052395 WO2009112384A2 (fr) 2008-03-14 2009-02-27 Dispositif de filtrage notamment destiné à un système de gaz d'échappement d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102008000688A1 (fr)
WO (1) WO2009112384A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013187442A1 (fr) * 2012-06-15 2013-12-19 イビデン株式会社 Filtre en nid d'abeilles
JPWO2013187442A1 (ja) * 2012-06-15 2016-02-04 イビデン株式会社 ハニカムフィルタ
US10286358B2 (en) 2013-07-31 2019-05-14 Ibiden Co., Ltd. Honeycomb filter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089751A1 (fr) * 1982-02-22 1983-09-28 Corning Glass Works Filtre pour particules solides
US4416676A (en) * 1982-02-22 1983-11-22 Corning Glass Works Honeycomb filter and method of making it
EP1676622A1 (fr) * 2003-10-23 2006-07-05 Ibiden Co., Ltd. Corps structure en nid d'abeille
DE102006026161A1 (de) * 2006-05-23 2007-11-29 Robert Bosch Gmbh Filtereinrichtung, insbesondere für ein Abgassystem einer Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089751A1 (fr) * 1982-02-22 1983-09-28 Corning Glass Works Filtre pour particules solides
US4416676A (en) * 1982-02-22 1983-11-22 Corning Glass Works Honeycomb filter and method of making it
EP1676622A1 (fr) * 2003-10-23 2006-07-05 Ibiden Co., Ltd. Corps structure en nid d'abeille
DE102006026161A1 (de) * 2006-05-23 2007-11-29 Robert Bosch Gmbh Filtereinrichtung, insbesondere für ein Abgassystem einer Brennkraftmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013187442A1 (fr) * 2012-06-15 2013-12-19 イビデン株式会社 Filtre en nid d'abeilles
WO2013186923A1 (fr) * 2012-06-15 2013-12-19 イビデン株式会社 Filtre en nid d'abeilles
JPWO2013187442A1 (ja) * 2012-06-15 2016-02-04 イビデン株式会社 ハニカムフィルタ
US9975076B2 (en) 2012-06-15 2018-05-22 Ibiden Co., Ltd. Honeycomb filter
US10286358B2 (en) 2013-07-31 2019-05-14 Ibiden Co., Ltd. Honeycomb filter

Also Published As

Publication number Publication date
WO2009112384A3 (fr) 2009-11-12
DE102008000688A1 (de) 2009-09-17

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