EP1225311A2 - Filtereinrichtung, insbesondere als Russfilter für Dieselmotorabgase - Google Patents
Filtereinrichtung, insbesondere als Russfilter für Dieselmotorabgase Download PDFInfo
- 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- Withdrawn
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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
- F01N3/023—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 Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
- Fig. 1
- eine perspektivische Ansicht der erfindungsgemäßen Filtereinrichtung mit Teilschnitten;
- Fig. 2
- einen Heizkörper für die Filtereinrichtung gemäß Fig. 1.
Claims (15)
- Filtereinrichtung (1), insbesondere als Rußfilter für Dieselmotorabgase, mit einem Filtergehäuse (2, 33), das einen Gaseinlaß und einen Gasauslaß hat und in dem ein Filterkörper (5) aus wenigstens teilweise porösem Keramikmaterial und einlaßseitig davor ein mit Durchströmkanälen (6) versehener Heizkörper (4, 31) aus elektrisch leitfähigem Keramikmaterial angeordnet ist, wobei der Heizkörper (4, 31) mit mehreren elektrischen Anschlüssen (19, 20) für eine segmentweise elektrische Aufheizung versehen ist, dadurch gekennzeichnet, daß Filterkörper (5) und Heizkörper (4, 31) mittels Trennwandungen (10, 11, 12, 13) in zueinander fluchtende Filterkörpersegmente (18) und Heizkörpersegmente (14, 15, 16, 17; 38, 39, 40, 41) aufgeteilt sind und daß die Heizkörpersegmente (14, 15, 16, 17; 38, 39, 40, 41) jeweils mit eigenen elektrischen Anschlüssen (19, 20) versehen sind.
- Filtereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß Filterkörper (5) und Heizkörper (4, 31) einen runden oder ovalen Querschnitt haben.
- Filtereinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Filterkörper (5) und Heizkörper (4, 31) mittels gemeinsamer Trennwandungen (10, 11, 12, 13) aufgeteilt sind.
- Filtereinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Heizkörper (4, 31) aus SiC besteht.
- Filtereinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Filterkörper (5) aus SiC besteht.
- Filtereinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß Heizkörper (4, 31) und Filterkörper (5) beabstandet sind.
- Filtereinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Abstand zwischen Heizkörper (4, 31) und Filterkörper (5) nicht größer als 70 mm ist, vorzugsweise zwischen 25 und 50 mm liegt.
- Filtereinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Trennwandungen (10, 11, 12, 13; 34, 35, 36, 37) elektrisch isolierend ausgebildet sind.
- Filtereinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Trennwandungen (10, 11, 12, 13; 34, 35, 36, 37) mit einer Wärmeisolierung versehen sind.
- Filtereinrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß sich die Trennwandungen (10, 11, 12, 13; 34, 35, 36, 37) von einem Mittelpunkt radial nach außen erstrecken.
- Filtereinrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß Filterkörper (5) und Heizkörper (4) in gleich große Filterkörpersegmente (18) bzw. Heizkörpersegmente (14, 15, 16, 17; 38, 39, 40, 41) aufgeteilt sind.
- Filtereinrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der Filterkörper (5) mit einer die Zündtemperatur herabsetzenden Katalysatorbeschichtung versehen ist.
- Filtereinrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Heizkörper (4, 31) parallele, sich in Durchströmrichtung erstreckende Durchströmkanäle (6) aufweist.
- Filtereinrichtung nach Anspruch 13, dadurch gekennzeichnet, daß die Durchströmkanäle (6) rechteckigen Querschnitt haben.
- Filtereinrichtung nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß der Filterkörper (5) nebeneinander und sich abwechselnd Einströmkanäle (7) und Ausströmkanäle (8) hat, die durch poröse, filterwirksame Längswandungen (9) getrennt sind, wobei die Einströmkanäle (7) einströmseitig offen und ausströmseitig geschlossen und die Ausströmkanäle (8) einströmseitig geschlossen und ausströmseitig offen ausgebildet sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20100882U | 2001-01-18 | ||
| DE20100882U DE20100882U1 (de) | 2001-01-18 | 2001-01-18 | Filtereinrichtung, insbesondere als Rußfilter für Dieselmotorabgase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1225311A2 true EP1225311A2 (de) | 2002-07-24 |
| EP1225311A3 EP1225311A3 (de) | 2003-02-12 |
Family
ID=7951776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01126814A Withdrawn EP1225311A3 (de) | 2001-01-18 | 2001-11-10 | Filtereinrichtung, insbesondere als Russfilter für Dieselmotorabgase |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1225311A3 (de) |
| DE (1) | DE20100882U1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1849513A3 (de) * | 2006-04-20 | 2007-11-21 | Ibiden Co., Ltd. | Körper mit wabenförmiger Struktur, Herstellungsverfahren dafür, Gehäuse und Abgasreinigungsvorrichtung |
| US8443590B2 (en) | 2009-07-02 | 2013-05-21 | GM Global Technology Operations LLC | Reduced volume electrically heated particulate filter |
Citations (9)
| 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 (de) | 1988-04-08 | 1989-10-11 | Per Stobbe | Methode zum Filtrieren von Partikeln aus Rauchgas, Rauchgasfiltermittel und Fahrzeug |
| US4897096A (en) | 1986-03-15 | 1990-01-30 | Fev Motorentechnik Gmbh & Co. Kg. | System for the regeneration of a particulate filter trap |
| WO1993013303A1 (en) | 1991-12-20 | 1993-07-08 | Per Stobbe | A filter unit and a filter body for filtering exhaust gas from diesel engines |
| 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 (de) | 1996-03-23 | 1997-09-24 | Thomas Josef Heimbach GmbH & Co. | Poröser durchströmbarer Formkörper sowie Verfahren zu seiner Herstellung |
| EP0943593A1 (de) | 1998-03-09 | 1999-09-22 | Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. | Formkörper aus einer elektrisch leitfähigen Keramik sowie Verfahren zur Herstellung von Kontaktbereichen an solchen Formkörpern |
Family Cites Families (4)
| 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 |
-
2001
- 2001-01-18 DE DE20100882U patent/DE20100882U1/de not_active Expired - Lifetime
- 2001-11-10 EP EP01126814A patent/EP1225311A3/de not_active Withdrawn
Patent Citations (9)
| 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 (de) | 1988-04-08 | 1989-10-11 | Per Stobbe | Methode zum Filtrieren von Partikeln aus Rauchgas, Rauchgasfiltermittel und Fahrzeug |
| WO1993013303A1 (en) | 1991-12-20 | 1993-07-08 | Per Stobbe | A filter unit and a filter body for filtering exhaust gas from diesel engines |
| 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 (de) | 1996-03-23 | 1997-09-24 | Thomas Josef Heimbach GmbH & Co. | Poröser durchströmbarer Formkörper sowie Verfahren zu seiner Herstellung |
| EP0943593A1 (de) | 1998-03-09 | 1999-09-22 | Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. | Formkörper aus einer elektrisch leitfähigen Keramik sowie Verfahren zur Herstellung von Kontaktbereichen an solchen Formkörpern |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 (de) | 2003-02-12 |
| DE20100882U1 (de) | 2002-05-23 |
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