EP1530500A2 - Corps pour filtre a suie - Google Patents

Corps pour filtre a suie

Info

Publication number
EP1530500A2
EP1530500A2 EP03792375A EP03792375A EP1530500A2 EP 1530500 A2 EP1530500 A2 EP 1530500A2 EP 03792375 A EP03792375 A EP 03792375A EP 03792375 A EP03792375 A EP 03792375A EP 1530500 A2 EP1530500 A2 EP 1530500A2
Authority
EP
European Patent Office
Prior art keywords
filter body
filter
body according
soot
cavities
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Withdrawn
Application number
EP03792375A
Other languages
German (de)
English (en)
Inventor
Claus Holm
Horst Kibbel
Ulf KÖNIG
Hartmut Presting
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1530500A2 publication Critical patent/EP1530500A2/fr
Withdrawn legal-status Critical Current

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
    • F01N3/0215—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 the filtering elements having the form of disks or plates
    • 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
    • B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
    • B01D39/2075—Other inorganic materials, e.g. ceramics the material being particulate or granular sintered or bonded by inorganic agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • 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
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are arranged in a single 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
    • 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
    • F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—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 using means for regenerating the filters, e.g. by burning trapped particles 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
    • 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

Definitions

  • the invention relates to a filter body for soot filters of internal combustion engines.
  • the object of the invention is to ensure effective exhaust gas cleaning with good regeneration ability of the soot filter.
  • Precise microstructuring of the filter body is required to filter out the smallest soot particles from the exhaust gas flow. It is particularly desirable here to optimize the shape, orientation and dimensions of the cavities in the filter body to meet the requirements of an effective filter effect. According to the invention, this is achieved by using semiconductor technology processes for structuring the body. The use of these methods allows the defined creation of structures even in the nanometer range; they are now used on an industrial scale. This makes it possible to filter out particles with a diameter of less than 10 nm due to the precise, requirement-oriented design of the filter body.
  • the etching methods known from semiconductor technology are advantageously used for microstructuring. Good results are achieved in particular by ICP (Inductive Coupled Plasma) etching or anodic etching.
  • ICP Inductive Coupled Plasma
  • An overview of known etching processes for microstructuring in the Semiconductor technology can be found, for example, under Köhler, "Etching Process for Microtechnology", Wiley-VCH 1998.
  • the separation of whiskers has also proven itself for microstructuring. Whiskers are thread-like crystals that are mostly single-crystalline or composed of a few crystallites.
  • the design options obtained through the selection of the above-mentioned production methods can be used advantageously for the defined microstructuring of the filter body.
  • the dimensions of the webs, cavities or pores of the filter body can be optimized for an optimal soot filter effect.
  • the design of the filter body as a monolithic block with a continuously decreasing pore size in the direction of the flow is advantageous.
  • the internal geometry of the filter body can be optimally matched to the requirements of a soot filter. To ensure the regeneration ability of the soot filter, it makes sense to manufacture the filter body in whole or in part from electrically conductive materials or to coat it with such materials. This eliminates the need to install a separate resistance heater.
  • the regeneration is independent of the temperature at which the exhaust gas fed into the filter is heated. This enables a space-optimized choice of the installation location of the filter in the exhaust system as well as an adjustment of the heating output to the current load condition of the filter.
  • the electrical conductivity of the filter material can be ensured, for example, by using suitably doped silicon.
  • the electrical properties of the filter body can be optimized with regard to an optimal regeneration effect during heating using the selected doping profiles.
  • silicon, germanium and their compounds or mixed crystals are suitable as filter body material.
  • Silicon in particular is chemically inert and mechanically stable even at high temperatures. This means that the filter body has a long service life over many regeneration cycles guaranteed.
  • semiconductor technology there is extensive experience in semiconductor technology regarding the microstructuring of the materials mentioned.
  • a further advantageous embodiment of the invention consists in coating the filter body with elements of the platinum metals or the rare earths in whole or in part, and thus to achieve a catalytic effect.
  • the reaction temperature at which soot burns to C0 2 is thereby reduced and a lower heating output is required to initiate the oxidation reaction.
  • an inexpensive filter element made of sintered silicon particles for example, can advantageously be used as an upstream filter.
  • the manufacture of the associated filter body is described in US Patent 4,767,585.
  • the average pore size is set by the particle size of the starting material.
  • a galvanically produced catalytic coating with e.g. Platinum is preferably obtained after the shaped body has been sintered.
  • the electrical resistance for direct heating of the filter element is set by doping the silicon starting material and / or the galvanic coating and the geometric shape.
  • the filter body described above can be easily integrated into a soot filter.
  • the geometry of the filter body can be selected so that it easily fits into a housing with the dimensions of conventional ones soot filter used in vehicles can be introduced. This means that conventionally equipped vehicles can be retrofitted without further design measures on the vehicle.
  • FIG. 1 shows an exemplary structure of a soot filter using filter bodies according to the invention.
  • the figure shows a longitudinal section through a soot filter, which has three partial filter bodies with different dimensions of the inner cavities.
  • the partial filter body 3 are arranged stacked in the housing 1 of the soot filter. This ensures that individual partial filter bodies can be replaced as part of maintenance measures.
  • the decrease in the dimensions of the inner cavities of individual partial filter bodies in the gas flow direction symbolized by arrow 2 is shown schematically. This ensures that the size of the filtered particles decreases in the direction of flow and that the fine pores or channels at the filter end are not prematurely clogged by soot particles.
  • the filter body In order to ensure that the filter body can be heated directly, it is contacted by means of the power connections 4 through the housing. If necessary, the soot filter shown can be heated in a simple manner by applying a voltage to the power connections and thus regenerated in the gas phase by oxidation of the soot particles to CO 2 with subsequent discharge from the filter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Corps de filtre pourvu d'espaces creux internes, destiné à être utilisé dans des filtres à particules pour des moteurs à combustion interne, qui est fabriqué de préférence selon des procédés de microstructuration dérivés de la technologie des semi-conducteurs, tels que par ex. l'attaque chimique ou le dépôt structuré. Le choix d'une matière électro-conductrice pour le corps de filtre permet d'obtenir un chauffage par résistance intégré.
EP03792375A 2002-08-23 2003-08-19 Corps pour filtre a suie Withdrawn EP1530500A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10239551A DE10239551A1 (de) 2002-08-23 2002-08-23 Filterkörper für Rußfilter
DE10239551 2002-08-23
PCT/EP2003/009173 WO2004018077A2 (fr) 2002-08-23 2003-08-19 Corps pour filtre a suie

Publications (1)

Publication Number Publication Date
EP1530500A2 true EP1530500A2 (fr) 2005-05-18

Family

ID=31197472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03792375A Withdrawn EP1530500A2 (fr) 2002-08-23 2003-08-19 Corps pour filtre a suie

Country Status (6)

Country Link
US (1) US20060051271A1 (fr)
EP (1) EP1530500A2 (fr)
JP (1) JP2005536334A (fr)
AU (1) AU2003258634A1 (fr)
DE (1) DE10239551A1 (fr)
WO (1) WO2004018077A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7469532B2 (en) * 2005-09-22 2008-12-30 Gm Global Technology Operations, Inc. Diesel particulate filter (DPF) regeneration by electrical heating of resistive coatings
KR101567919B1 (ko) * 2015-07-07 2015-11-11 허정민 포집필터 세트 및 상기 포집필터 세트를 케이스를 이용하여 제조한 포집필터

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB721592A (en) * 1951-03-29 1955-01-12 Ronald John Stevens Improvements in or relating to filters
JPS6038014A (ja) * 1983-08-10 1985-02-27 Toray Ind Inc 濾過方法
DE3613778A1 (de) * 1986-04-23 1987-10-29 Heliotronic Gmbh Verfahren zur herstellung von formkoerpern aus granulat auf der basis von silicium, germanium oder mischkristallen dieser elemente
US4965101A (en) * 1987-12-10 1990-10-23 Swiss Aluminium Ltd. Ceramic foam for filters for cleaning exhaust gases of diesel engines
US5510194A (en) * 1989-07-05 1996-04-23 Alabama Cryogenic Engineering, Inc. Perforated plate filter media and related products
DE4106301A1 (de) * 1991-02-28 1992-09-03 Roggenkamp Karl Heinz Verfahren zum regenerieren mit russ beladener abgasfilter
DE4034365A1 (de) * 1990-10-29 1992-04-30 Kernforschungsz Karlsruhe Verfahren zur herstellung freitragender mikrostrukturen
DE4137738C2 (de) * 1991-11-15 1993-12-23 Daimler Benz Ag Rußfilter
NL9200902A (nl) * 1992-05-21 1993-12-16 Cornelis Johannes Maria Van Ri Keramisch membraan voor microfiltratie, alsmede werkwijze ter vervaardiging van een dergelijk membraan.
DE4244511C2 (de) * 1992-12-30 2002-09-12 Hermann Josef Gerstenmeier Vorrichtung zum filtrierenden Entfernen von Rußpartikeln
US5846276A (en) * 1995-07-05 1998-12-08 Matsushita Electric Industrial Co., Ltd. Exhaust gas filter
US5882496A (en) * 1997-02-27 1999-03-16 The Regents Of The University Of California Porous silicon structures with high surface area/specific pore size
JP2002533236A (ja) * 1998-12-23 2002-10-08 モーフォメトリックス テクノロジーズ インコーポレーテッド 薄膜ミクロフィルタの現場での製造
ITTO20010034A1 (it) * 2001-01-19 2002-07-19 Fiat Ricerche Filtro di particolato per motori diesel
DE10153284A1 (de) * 2001-10-29 2003-05-15 Emitec Emissionstechnologie Filterverbund und Verfahren zu seiner Herstellung
US20030080060A1 (en) * 2001-10-30 2003-05-01 .Gulvin Peter M Integrated micromachined filter systems and methods
DE10304814C5 (de) * 2003-02-06 2009-07-02 Emitec Gesellschaft Für Emissionstechnologie Mbh Verfahren und Werkzeug zur Herstellung von strukturierten Blechlagen; Katalysator-Trägerkörper
NL1030081C2 (nl) * 2005-09-30 2007-04-02 Stork Veco Bv Zeefmateriaal uit metaal en werkwijze voor de vervaardiging daarvan.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004018077A2 *

Also Published As

Publication number Publication date
DE10239551A1 (de) 2004-03-04
WO2004018077A3 (fr) 2004-04-22
US20060051271A1 (en) 2006-03-09
AU2003258634A1 (en) 2004-03-11
JP2005536334A (ja) 2005-12-02
WO2004018077A2 (fr) 2004-03-04

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