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WO2006114345A1 - Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne - Google Patents

Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne Download PDF

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Publication number
WO2006114345A1
WO2006114345A1 PCT/EP2006/060289 EP2006060289W WO2006114345A1 WO 2006114345 A1 WO2006114345 A1 WO 2006114345A1 EP 2006060289 W EP2006060289 W EP 2006060289W WO 2006114345 A1 WO2006114345 A1 WO 2006114345A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter device
wave
wall
elevations
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.)
Ceased
Application number
PCT/EP2006/060289
Other languages
German (de)
English (en)
Inventor
Bernd Reinsch
Teruo Komori
Lars Thuener
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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
Priority to EP06708525A priority Critical patent/EP1879682A1/fr
Publication of WO2006114345A1 publication Critical patent/WO2006114345A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/206—Special forms, e.g. adapted to a certain housing
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated 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
    • 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
    • F01N2330/14—Sintered material
    • 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
    • F01N2330/323—Corrugations of saw-tooth or triangular form
    • 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
    • F01N2330/324—Corrugations of rectangular form
    • 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

Definitions

  • Filter device in particular soot particle filter, for an exhaust system of an internal combustion engine
  • the invention relates to a filter device, in particular a soot particle filter for an exhaust system of an internal combustion engine, according to the preamble of claim 1.
  • a filter device of the type mentioned is known from DE 101 28 936 Al. At the shown there
  • Filter device is a particulate filter for an exhaust system of a diesel internal combustion engine.
  • the filter bodies in the known filter device are made of sintered metal, which forms a porous filtration material, and arranged so that wedge-shaped filter bags are formed.
  • the tapered wedge edges of the filter pockets show against the flow direction of the exhaust gas, the rear narrow side of a filter pocket viewed in the flow direction is open.
  • the filter pockets are arranged side by side such that an overall rotationally symmetrical annular filter structure is formed.
  • the exhaust gas passes through the generally planar filter walls of the filter pockets, with particles at the upstream surface of the respective ones Filter wall are deposited.
  • the soot particles deposited over time on the upstream surface of the filter wall lead to a reduction in the soot particles
  • the filter walls are on the upstream surface at least partially uneven by wave-like elevations are provided there.
  • Object of the present invention is to develop a filter device of the type mentioned so that it has the highest possible efficiency.
  • the filter device according to the invention is compared to conventional filter devices the upstream surface larger.
  • a larger amount of particles can be deposited there, without resulting in an impermissible increase in the pressure drop in the flow through the filter wall.
  • Filter device are regenerated less frequently compared to conventional filter devices, which reduces the total required for regeneration fuel use.
  • the filter structure is at least partially provided with a catalytic coating, the surface available for this catalytic coating on the upstream side is increased, which improves the overall catalytic effect.
  • the proposed wavy patterning of the upstream surface of a filter wall is common to all Types of filter structures (honeycomb filter) with mutually closed flow channels or filter bags possible.
  • the corresponding filter pockets or flow channels may be either square, alternating square and octagonal in cross section (so-called "Octosquare filter”) or have another almost arbitrary symmetry.
  • a material for the production of a filter wall is for example a ceramic, a glass-ceramic or a metallic material or composite material in question, preferably SiC and cordierite.
  • thermomechanical and filtration properties can be set in a very specific manner.
  • the geometry can be achieved for example by two-sided wave-like elevations, by a total wave-like structure of the filter wall, on both sides of the filter wall opposite or staggered elevations.
  • Figure 1 is a schematic representation of a
  • Figure 2 is an enlarged schematic
  • FIG. 1 Sectional view of a portion of a filter structure of the filter device of Figure 1;
  • Figure 3 is a section along the line III-III of Figure 2 showing an inflow pocket;
  • Figure 4 is a view similar to Figure 3 of an alternative embodiment of a
  • Figure 5 is a view seen in the flow direction on a filter structure having a plurality of inflow pockets according to Figure 4;
  • Figure 6 is a section through an alternative embodiment of a filter wall
  • Figure 7 is a view similar to Figure 6 of a further modified embodiment.
  • Figure 8 is a view similar to Figure 6 of a further modified embodiment.
  • 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. With this, soot particles are filtered out of the exhaust gas flowing in the exhaust pipe 12. This is especially necessary for diesel engines to comply with legal requirements.
  • the filter device 14 comprises a cylindrical housing 16, in which a rotationally symmetrical overall cylindrical filter structure 18 is arranged in the present exemplary embodiment.
  • this filter structure 18 comprises a plurality of mutually closed filter channels through which inflow-side filter pockets 20 ("inflow pockets”) and outflow-side filter pockets 21 (“outflow pockets”) are formed.
  • Their cross-sectional geometry can either be square, which corresponds to a standard honeycomb filter, or alternatively square and octagonal, which is referred to as "Octosquare filter", or they can have a different symmetry.
  • lateral filter walls 22 which have an upstream surface 24 and a downstream surface 26.
  • the mutual closure of the filter pockets 20 is in the region of the upstream end face 28 of the filter structure 18 by appropriate
  • End walls 32, in the region of the downstream end face 30 by corresponding end walls 34 causes.
  • an inflow pocket 20 having a square cross-sectional geometry is shown enlarged: It can be seen that the upstream surface 24 of a filter wall 22 has wave-like elevations 36, whereas the downstream face 26 of a filter wall 22 is substantially planar. The wave-like elevations 36 run in the
  • the cross-sectional geometry of the individual wave-like elevations 36 is triangular in the embodiment shown in FIG. It is also conceivable, however, a sinusoidal or a four- or rectangular contour of the wave-like elevations.
  • the wave-like projections 36 are arranged at regular intervals from each other, resulting in a period length P, which is preferably in the range of about 0.1 mm to about 0.5 mm.
  • the height ("amplitude" A) of the wave-like elevations is in the range of about 0.1 mm to 0.5 mm. The amplitude results as a difference of the maximum wall thickness S 2 to the minimum wall thickness Si.
  • FIG. 4 shows an alternative embodiment of an inflow pocket 20.
  • the filter walls 22, which have a constant wall thickness s, of an inflow pocket 20 are formed in a wave-like manner overall. In this way, wave-like protrusions 36 are found not only on the upstream surface 24 of a
  • Filter wall 22 but also on the downstream surface 26 of a filter wall 22 corresponding wave-like projections 40 are present.
  • the latter extend in the direction of the main flow direction present downstream of a filter wall 22, which is illustrated by a dot-dash line 42 in FIG.
  • the filter structure 18 shown in FIG. 5 can be formed.
  • FIGS. 6 to 8 Further possible embodiments of filter walls 22 are shown in FIGS. 6 to 8. Unlike the filter walls 22 shown in FIGS. 4 and 5, the filter wall 22 shown in FIG. 6 is not formed as a whole wave-shaped, but only upstream thereof Surface 24 and its downstream surface 26.
  • the wave-like projections 36 on the upstream surface 24 have the same period as the wave-like projections 40 on the downstream surface 26.
  • the wave-like projections 36 and 40 are fairly close to each other, so that there the maximum wall thickness S 2 is formed.
  • the phase positions of the wave-like elevations 36 and 40 are approximately identical.
  • the phase position of the wave-like elevations 40 is shifted by a quarter of a period relative to the wave-like elevations 36.
  • the wave-like projections 40 are shifted from the wave-like projections 36 even by half a period.
  • the undulations of the downstream surface have a different period than the undulations on the upstream surface. In this way, the minimum wall thickness Si and the maximum wall thickness S 2 can be varied, so that the filter and skill properties of a filter wall can be precisely adjusted.
  • the filter structures 18 shown above with the filter walls 22 can be very easily by extruding a ceramic, glass-ceramic, or metallic material or
  • MaterialVerbunds are produced. Particularly suitable materials based on SiC and cordierite. For this purpose, in the extrusion of the raw material tools are used, through which the filter walls 22 are shaped accordingly. In a subsequent sintering This form does not change or only marginally.
  • a catalytic coating (not shown) may be applied to the filter structure 18, particularly the upstream surface 24, which, for example, reduces the temperature required for regeneration of the filter structure 18.

Landscapes

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

Abstract

L'invention concerne un système de filtre (14), notamment un filtre à particules de suies destiné à un système d'échappement d'un moteur à combustion interne, comportant une structure de filtre (18). Cette structure de filtre comporte au moins une paroi de filtre (22), les particules filtrées se déposant sur la surface amont (24) de ladite paroi. Selon l'invention, au moins la surface amont (24) de la paroi de filtre (22) présente au moins partiellement des saillies (36) en forme de vagues, s'étendant au moins essentiellement dans la direction d'écoulement principale amont.
PCT/EP2006/060289 2005-04-27 2006-02-27 Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne Ceased WO2006114345A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06708525A EP1879682A1 (fr) 2005-04-27 2006-02-27 Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510019464 DE102005019464A1 (de) 2005-04-27 2005-04-27 Filtereinrichtung, insbesondere Rußpartikelfilter, für ein Abgassystem einer Brennkraftmaschine
DE102005019464.8 2005-04-27

Publications (1)

Publication Number Publication Date
WO2006114345A1 true WO2006114345A1 (fr) 2006-11-02

Family

ID=36169089

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/060289 Ceased WO2006114345A1 (fr) 2005-04-27 2006-02-27 Systeme de filtre, notamment filtre a particules de suies destine a un systeme d'echappement d'un moteur a combustion interne

Country Status (3)

Country Link
EP (1) EP1879682A1 (fr)
DE (1) DE102005019464A1 (fr)
WO (1) WO2006114345A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003658A1 (de) * 2008-01-09 2009-07-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Wabenkörper mit strukturiertem Blechmaterial
EP2236190A1 (fr) * 2009-03-25 2010-10-06 NGK Insulators, Ltd. Filtre en nid d'abeille et son procédé de fabrication
CN108331642A (zh) * 2017-01-20 2018-07-27 日本碍子株式会社 蜂窝结构体

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2912069B1 (fr) * 2007-02-05 2011-04-01 Saint Gobain Ct Recherches Structure de filtration d'un gaz a paroi ondulee
WO2018159554A1 (fr) * 2017-03-01 2018-09-07 株式会社村田製作所 Filtre

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428037A1 (fr) * 1989-11-14 1991-05-22 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Filtre pour éliminer des impuretées
WO1995006510A1 (fr) * 1993-09-01 1995-03-09 Per Stobbe Procede de production d'une unite de filtrage
EP1125704A1 (fr) * 1999-08-30 2001-08-22 Ngk Insulators, Ltd. Structure en nid d'abeille de paroi ondulee et procede de production de celle-ci
WO2005068052A1 (fr) * 2004-01-13 2005-07-28 Robert Bosch Gmbh Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428037A1 (fr) * 1989-11-14 1991-05-22 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Filtre pour éliminer des impuretées
WO1995006510A1 (fr) * 1993-09-01 1995-03-09 Per Stobbe Procede de production d'une unite de filtrage
EP1125704A1 (fr) * 1999-08-30 2001-08-22 Ngk Insulators, Ltd. Structure en nid d'abeille de paroi ondulee et procede de production de celle-ci
WO2005068052A1 (fr) * 2004-01-13 2005-07-28 Robert Bosch Gmbh Filtre plisse continu pour la filtration des particules et procede de fabrication dudit filtre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003658A1 (de) * 2008-01-09 2009-07-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Wabenkörper mit strukturiertem Blechmaterial
US8460612B2 (en) 2008-01-09 2013-06-11 Emitec Gesellschaft Fuer Emissionstechnologie Mgh Honeycomb body with structured sheet metal material and particle separator, catalyst carrier body and motor vehicle having the honeycomb body
EP2236190A1 (fr) * 2009-03-25 2010-10-06 NGK Insulators, Ltd. Filtre en nid d'abeille et son procédé de fabrication
CN108331642A (zh) * 2017-01-20 2018-07-27 日本碍子株式会社 蜂窝结构体

Also Published As

Publication number Publication date
DE102005019464A1 (de) 2006-11-02
EP1879682A1 (fr) 2008-01-23

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