EP1225311A2 - Dispositif de filtre, en particulier pour un filtre à particule de gaz d'échappement d'un moteur diesel - Google Patents

Dispositif de filtre, en particulier pour un filtre à particule de gaz d'échappement d'un moteur diesel Download PDF

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Publication number
EP1225311A2
EP1225311A2 EP01126814A EP01126814A EP1225311A2 EP 1225311 A2 EP1225311 A2 EP 1225311A2 EP 01126814 A EP01126814 A EP 01126814A EP 01126814 A EP01126814 A EP 01126814A EP 1225311 A2 EP1225311 A2 EP 1225311A2
Authority
EP
European Patent Office
Prior art keywords
filter
filter device
filter body
radiator
segments
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Withdrawn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
EP01126814A
Other languages
German (de)
English (en)
Other versions
EP1225311A3 (fr
Inventor
Bernd Ebener
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.)
Heimbach GmbH and Co KG
Original Assignee
Thomas Josef Heimbach and Co 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 Thomas Josef Heimbach and Co GmbH filed Critical Thomas Josef Heimbach and Co GmbH
Publication of EP1225311A2 publication Critical patent/EP1225311A2/fr
Publication of EP1225311A3 publication Critical patent/EP1225311A3/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a filter device, in particular as a soot filter for diesel engine exhaust with a filter housing, that has a gas inlet and a gas outlet and in which a filter body made of at least partially porous Ceramic material and one on the inlet side Radiator made of electrical flow channels Conductive ceramic material is arranged, the Radiator with multiple electrical connections for one Electrical heating is provided in segments.
  • filter bodies are increasingly being made porous ceramic material used, in particular here SiC ceramic material has proven itself, for example is described in EP 0 796 830 A1.
  • the filter body can be circular, oval or rectangular cross-section to have.
  • the filter body has a A plurality of channels extending in the axial direction on, the alternating entry or exit side are sealed gas-tight.
  • the thing to be cleaned Gas can enter the inflow channels open there enter. As this is closed on the outlet side are, the gas is forced through the porous longitudinal walls of the channels to flow through and over each neighboring and open outlet channels emanate. Place on and in the longitudinal walls the soot particles.
  • Such filter bodies are in Filter housings with a gas inlet and a gas outlet used and essentially axially in the above Flows through (see EP 0 336 883; US 4,897 096).
  • the ceramic body no inflow or outflow channels, but form overall porous filter body, the pores of which flow axially (cf. WO 93/13303; US 4,505,107; US 4 535 589).
  • US 4,535,589 and US 4,505,107 are filter devices described a filter body in a filter housing made of porous ceramic foam. On theirs inlet end faces is a radiator from a arranged electrically conductive ceramic material that has a plurality of axial flow channels and is provided with electrical connections to a Circuit are connected. In this way, the Radiator and thus the gas flowing through it to a are heated such that the soot particles in burn the filter body, i.e. the filter body regenerates becomes.
  • the radiator In the generic US 4,505,107 several pairs distributed over the circumference of the radiator of electrical connections available, each there are two connections on one circuit. To this In this way, the radiator can be supplied with current in sections and be heated with it. The same is true provided in the radiator according to US 4,535,589.
  • Heating coils extending in the direction see US Pat. No. 4,897,096) or heating rods (cf. DE 42 30 667 C1).
  • the radiator according to US 4,897,096 extends Heating coils within the inflow channels.
  • the heating rods protrude into separate flow channels, a filter body is inserted into the outlet side is.
  • the heating elements can be used independently and consecutively supplied with electrical current so that the filter body can be regenerated by the one flowing into the flow channels Gas through the associated heating element to the ignition temperature the soot particles deposited in the filter body is heated.
  • the solution according to DE 42 30 667 C1 is space-consuming because the heat transfer bad because of the small area of the heating elements is and therefore the heating zone is relatively long must and there the filter body because of its round cross-section and their distances from each other the cross section use the filter housing insufficiently.
  • the direct segmental heating of the filter body according to WO 93/13303 limits the choice of material for the Filter body as it is made of an electrically conductive Ceramics must exist. In addition, the heating is uneven.
  • the invention has for its object a filter device of the type mentioned in such a way that an effective partial regeneration of the filter body without large heat losses achieved in a small space becomes.
  • the radiator made of ceramic material ensures due the large number of flow channels and thus one large heat transfer surface for intensive heat transfer, so that the axial extent of the radiator is low can be held. Because the filter housing filter body and can surround the radiator closely the space enclosed by the filter housing is optimally used, d. H. the entire filter device builds a lot small.
  • the basic idea of the invention is not limited to any one Limited external shape of heating and filter body, d. H. the division according to the invention can also rectangular (square) or polygonal cross sections be made. To avoid warping However, a round or oval outer surface is recommended Cross-section. Furthermore, it is useful if the Distribution of heating and filter bodies by means of common Partitions takes place, so the partitions both through the radiator as well as through the filter body extend.
  • the material for the radiator is electrical conductive SiC, such as in the EP 0 796 830 A1.
  • the same or similar Material can also be used for the filter body but not the electrical design Conductivity must take into account.
  • radiator and filter body are spaced, whereby the distance advantageously does not exceed 70 mm, is preferably in the range between 25 to 50 mm. On this way there will be electrical contact between the radiators and filter body avoided.
  • partition walls are electrical are insulated so that there is no heating of the neighboring segments in the radiator. Further it is useful if the partition walls are additional are provided with thermal insulation to prevent heat loss to keep low.
  • the partition walls suitably exist made of the same material as the housing, for this purpose especially stainless steel with thermal and electrical insulation is appropriate.
  • the division is expedient in such a way that filter or Radiator segments result. However, this does not exclude out to make the division so that different large segments emerge.
  • the filter body with a lowering the ignition temperature Catalyst coating is provided.
  • Such Coating leaves lower temperatures of the radiator segments and reduces the electricity requirement.
  • the catalyst coating such as rhodium, iridium, palladium or Platinum in question.
  • the radiator expediently has parallel, in Flow direction extending, preferably rectangular Cross-sectional flow channels on how this for example from the radiator according to the US 4,505,107 is known. But also other cross-sectional shapes are conceivable.
  • the filter body is advantageously of the type at the side by side and alternating inflow channels and Outflow channels are present through porous, filter-effective Longitudinal walls are separated, the inflow channels open on the inflow side and closed on the outflow side and the outflow channels are closed on the inflow side and are designed to be open on the outflow side.
  • This does not rule out using filter bodies like them are known for example from WO 93/13303 and the have no defined flow channels.
  • the filter device 1 shown in FIG. 1 has a in cross section oval filter housing 2, which is on the outlet side tapered and ends in a flange 3. About this flange 3, the filter device 1 with an adjoining exhaust pipe.
  • the input part of the filter housing 2 is here cut away. It is designed similarly to the output side Part and has a flange at the end, with which he attached to the engine-side section of the exhaust pipe can be connected.
  • radiator 4 and filter body 5 have an identical oval cross section, adapted to the cross section of the filter housing 2 is. They are spaced apart in the flow direction.
  • the heater 4 is made of electrically conductive ceramic material and has a grid-like cross-section, so that a variety of themselves in the axial direction extending, open flow channels - exemplary designated 6 - result.
  • the filter body 5 is similarly shaped like a lattice in cross section. however are part of the channels on the inlet side like a chessboard closed, so that alternately and side by side inlet channels open on the inlet side - exemplary with 7 designated - and outlet channels closed on the inlet side - designated by way of example with 8 - result.
  • the inflow channels 7 are closed on the outlet side and the outflow channels 8 designed to be open on the outlet side. Between inflow channels 7 and outflow channels 8 are porous, filter-effective longitudinal walls - designated 9 by way of example.
  • the radiator 4 is by cross-shaped partition walls 10, 11, 12, 13 in four equal radiator segments 14, 15, 16, 17 divided.
  • the partitions 10, 11, 12, 13 extend radially to the inner wall of the filter housing 2. They insulate the radiator segments 14, 15, 16, 17 electrically and also thermally.
  • the Partitions 10, 11, 12, 13 set axially in the direction Outlet and also pass through the filter body 5 over its entire axial length, so that the filter body 5 is also divided accordingly, namely in four filter body segments 18 of equal size, of which here only one can be seen.
  • Each radiator segment 14, 15, 16, 17 is a pair of on the outside of the filter housing 2 arranged electrical connections 19, 20 assigned to the inside corresponding electrodes with the respective associated Radiator segment 14, 15, 16, 17 are connected.
  • each Pair of electrical connections 19, 20 is with a control device connected, which are not shown here is.
  • the radiator segments can be controlled via the control device 14, 15, 16, 17 separately from each other with electrical Electricity can be applied.
  • the electrical conductivity the radiator segments 14, 15, 16, 17 is set so that it turns on when current is applied heat a high temperature. This makes the one Part of the exhaust gas flow that is the heated radiator segment 14, 15, 16 and 17 flows to a temperature heated above the ignition temperature of the in the filter body 5 deposited soot.
  • the filter body segment 18 consequently burns off the soot and thus regenerates the filter body segment 18.
  • the other filter body segments can also be used in succession 18 by appropriate current application of the respective aligned radiator segment 14, 15, 16 and 17 regenerated become.
  • a heater 31 is shown by a only partially shown filter housing 33 surrounded is.
  • the heater 31 is separated by partitions 34, 35, 36, 37 into four equally large radiator segments 38, 39, 40, 41 divided.
  • the partition walls 34, 35, 36, 37 are however not - as in the embodiment according to FIG 1 - straight stretched, but have wave shape. It is understood that this waveform is in continues the filter body, not shown here, so that the filter body accordingly in filter body segments is divided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
EP01126814A 2001-01-18 2001-11-10 Dispositif de filtre, en particulier pour un filtre à particule de gaz d'échappement d'un moteur diesel Withdrawn EP1225311A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20100882U DE20100882U1 (de) 2001-01-18 2001-01-18 Filtereinrichtung, insbesondere als Rußfilter für Dieselmotorabgase
DE20100882U 2001-01-18

Publications (2)

Publication Number Publication Date
EP1225311A2 true EP1225311A2 (fr) 2002-07-24
EP1225311A3 EP1225311A3 (fr) 2003-02-12

Family

ID=7951776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01126814A Withdrawn EP1225311A3 (fr) 2001-01-18 2001-11-10 Dispositif de filtre, en particulier pour un filtre à particule de gaz d'échappement d'un moteur diesel

Country Status (2)

Country Link
EP (1) EP1225311A3 (fr)
DE (1) DE20100882U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2860993A1 (fr) * 2003-10-16 2005-04-22 Sicat Filtre catalytique a base de carbure de silicium (b-sic) pour la combustion des suies issues des gaz d'echappement d'un moteur a combustion
FR2860992A1 (fr) * 2003-10-16 2005-04-22 Sicat Filtre catalytique a base de carbure de silicium (b-sic) pour la combustion des suies issues des gaz d'echappement d'un moteur a combustion
DE102008041530A1 (de) 2008-08-25 2010-03-04 Dirk Dombrowski Verfahren und Abgasanlage zur Reinigung SOx-haltiger Abgase, insbesondere von Schiffsbrennkraftmaschinen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1849513A3 (fr) * 2006-04-20 2007-11-21 Ibiden Co., Ltd. Corps à structure en nids d'abeilles, son procédé de fabrication, boîtier et appareil de purification de gaz d'échappement
US8443590B2 (en) 2009-07-02 2013-05-21 GM Global Technology Operations LLC Reduced volume electrically heated particulate filter

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505107A (en) 1981-10-26 1985-03-19 Nippondenso Co., Ltd. Exhaust gas cleaning apparatus
US4535589A (en) 1981-05-26 1985-08-20 Nippon Soken, Inc. Exhaust gas cleaning device for internal combustion engine
EP0336883A1 (fr) 1988-04-08 1989-10-11 Per Stobbe Méthode pour filtrer des particules d'un gaz de fumée, un filtre pour gaz de fumée et un véhicule
US4897096A (en) 1986-03-15 1990-01-30 Fev Motorentechnik Gmbh & Co. Kg. System for the regeneration of a particulate filter trap
WO1993013303A1 (fr) 1991-12-20 1993-07-08 Per Stobbe Ensemble filtre et corps de filtre destines a filtrer les gaz d'echappement de moteurs diesel
DE4230667C1 (de) 1992-09-14 1994-03-31 Energietechnik Bremen Gmbh Partikelfilter für eine Gasströmung
US5423904A (en) 1993-05-28 1995-06-13 Dasgupta; Sankar Exhaust gas filter
EP0796830A1 (fr) 1996-03-23 1997-09-24 Thomas Josef Heimbach GmbH & Co. Corps moulé laissant passer un courant de fluide et méthode pour sa fabrication
EP0943593A1 (fr) 1998-03-09 1999-09-22 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Corps conducteur en céramic et procédé d'établir des contacts sur un tel corps

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207807A (en) * 1986-12-05 1993-05-04 Iveco Fiat S.P.A. Regenerable filter for exhaust gases of an internal-combustion engine
US5212948A (en) * 1990-09-27 1993-05-25 Donaldson Company, Inc. Trap apparatus with bypass
DK29093D0 (da) * 1993-03-15 1993-03-15 Per Stobbe Heated silicon carbide filter
DE10062348A1 (de) * 2000-12-14 2002-06-20 Bosch Gmbh Robert Verfahren zur Regeneration eines Partikelfilters und Partikelfilter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535589A (en) 1981-05-26 1985-08-20 Nippon Soken, Inc. Exhaust gas cleaning device for internal combustion engine
US4505107A (en) 1981-10-26 1985-03-19 Nippondenso Co., Ltd. Exhaust gas cleaning apparatus
US4897096A (en) 1986-03-15 1990-01-30 Fev Motorentechnik Gmbh & Co. Kg. System for the regeneration of a particulate filter trap
EP0336883A1 (fr) 1988-04-08 1989-10-11 Per Stobbe Méthode pour filtrer des particules d'un gaz de fumée, un filtre pour gaz de fumée et un véhicule
WO1993013303A1 (fr) 1991-12-20 1993-07-08 Per Stobbe Ensemble filtre et corps de filtre destines a filtrer les gaz d'echappement de moteurs diesel
DE4230667C1 (de) 1992-09-14 1994-03-31 Energietechnik Bremen Gmbh Partikelfilter für eine Gasströmung
US5423904A (en) 1993-05-28 1995-06-13 Dasgupta; Sankar Exhaust gas filter
EP0796830A1 (fr) 1996-03-23 1997-09-24 Thomas Josef Heimbach GmbH & Co. Corps moulé laissant passer un courant de fluide et méthode pour sa fabrication
EP0943593A1 (fr) 1998-03-09 1999-09-22 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Corps conducteur en céramic et procédé d'établir des contacts sur un tel corps

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2860993A1 (fr) * 2003-10-16 2005-04-22 Sicat Filtre catalytique a base de carbure de silicium (b-sic) pour la combustion des suies issues des gaz d'echappement d'un moteur a combustion
FR2860992A1 (fr) * 2003-10-16 2005-04-22 Sicat Filtre catalytique a base de carbure de silicium (b-sic) pour la combustion des suies issues des gaz d'echappement d'un moteur a combustion
WO2005038204A1 (fr) * 2003-10-16 2005-04-28 Sicat FILTRE CATALYTIQUE A BASE DE CARBURE DE SILICIUM (β-SiC)POUR LA COMBUSTION DES SUIES ISSUES DES GAZ D’ECHAPPEMENT D’UN MOTEUR A COMBUSTION
US7479265B2 (en) 2003-10-16 2009-01-20 Sicat Catalytic filter based on silicon carbide (β-SiC) for combustion of soot derived from exhaust gases from an internal combustion engine
DE102008041530A1 (de) 2008-08-25 2010-03-04 Dirk Dombrowski Verfahren und Abgasanlage zur Reinigung SOx-haltiger Abgase, insbesondere von Schiffsbrennkraftmaschinen

Also Published As

Publication number Publication date
EP1225311A3 (fr) 2003-02-12
DE20100882U1 (de) 2002-05-23

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