EP0359031B1 - Dispositif de filtrage des particules de suie de l'échappement d'un moteur à combustion interne - Google Patents

Dispositif de filtrage des particules de suie de l'échappement d'un moteur à combustion interne Download PDF

Info

Publication number
EP0359031B1
EP0359031B1 EP89115990A EP89115990A EP0359031B1 EP 0359031 B1 EP0359031 B1 EP 0359031B1 EP 89115990 A EP89115990 A EP 89115990A EP 89115990 A EP89115990 A EP 89115990A EP 0359031 B1 EP0359031 B1 EP 0359031B1
Authority
EP
European Patent Office
Prior art keywords
filter
soot particles
exhaust gases
combustion engine
ducts
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.)
Expired - Lifetime
Application number
EP89115990A
Other languages
German (de)
English (en)
Other versions
EP0359031A1 (fr
Inventor
Gerhard Dr.-Ing. Lepperhoff
Georg Dipl.-Ing. Lütkemeyer
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.)
FEV Europe GmbH
Original Assignee
FEV Motorentechnik GmbH and Co KG
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 FEV Motorentechnik GmbH and Co KG filed Critical FEV Motorentechnik GmbH and Co KG
Publication of EP0359031A1 publication Critical patent/EP0359031A1/fr
Application granted granted Critical
Publication of EP0359031B1 publication Critical patent/EP0359031B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the invention relates to a filter arrangement for removing soot particles from exhaust gases of an internal combustion engine, in particular a diesel engine, with at least one filter body made of a porous filter material formed by honeycomb-arranged filter channels, wherein electrical resistance heating elements are arranged in the region of the inlet openings of the filter channels open on the gas inlet side Supply line and a discharge line are connected to a power supply.
  • Exhaust gas aftertreatment systems are known for reducing particle emissions, particularly in diesel engines. These usually consist of filter systems that retain and collect the particles present in the exhaust gas. The soot particles retained in the filter lead to an increase in the flow resistance in the exhaust system, so that the exhaust gas back pressure of the engine increases. This leads to an increase in fuel consumption and, in extreme cases, to engine shutdown. It is therefore necessary to remove the particles that have accumulated in the filter, for example by oxidation at high temperatures.
  • honeycomb filters made of a porous ceramic material have proven to be useful as filter bodies for the retention of the soot particles. These honeycomb filters are formed by a large number of parallel filter channels, which are alternately closed on the gas inlet side and gas outlet side, so that the exhaust gases flow through the porous filter walls and the soot particles separate on the walls of the filter channels. The filter can be regenerated by burning off the collected particles.
  • the temperatures required to ignite the soot particles in the exhaust gas are often not reached frequently enough by diesel engines, so that regeneration is not ensured. Forced regeneration can be achieved by adding additional energy.
  • a particularly energy-efficient regeneration can be achieved if the soot layer deposited on the filter body is ignited point by point in the inlet area of the filter channels by a brief supply of energy. The release of energy during the soot combustion that then begins leads to self-supporting soot combustion in the filter body.
  • the soot layer can be ignited by loop-shaped resistance wires inserted into the opening of the filter channels.
  • a loop of the heating conductor must be inserted into as many filter channels of the honeycomb filter as possible for the regeneration to be as complete as possible.
  • the number of filter channels that can be provided with loops of a heating conductor is limited by the electrical resistance of the heating conductor.
  • the heating conductor length is approximately 15 to 25 cm, from which 10 to 15 loops can be bent.
  • Ceramic honeycomb filters have around 1000 channels that need to be heated. A large number of individual heating wires bent into loops must therefore be used and connected in parallel for the filter to be heated as completely as possible.
  • a high heating output is required, which cannot be applied by the vehicle's electrical system. The heating power can therefore only be applied by sequential regeneration of individual sections of the filter, as is the case e.g. is known from US-A-4,427,418.
  • the loop-shaped heating conductors In order to be able to carry out sequential regeneration, the loop-shaped heating conductors have to be connected to small groups.
  • the individual groups are electrically separated from one another in this way to the supply chip connected to the vehicle so that they can be switched on independently.
  • the distance between the individual connections, which must be electrically insulated from each other, is very narrow due to the small channel cross sections of approx. 2 x 2 mm. A mutual touch of the individual connections would lead to a short circuit during operation of the vehicle or to simultaneous switching on of several areas with high power consumption for the vehicle electrical system.
  • individual loops When the wires migrate out, individual loops can also be bridged. As a result, the electrical resistance of the heating conductor then drops, as a result of which the heating conductor temperature rises and the wire can burn out.
  • the invention has for its object to provide a regeneration arrangement for diesel particulate filter of the type mentioned, in which a secure fixation of the connections of the heating conductors and the heating loops in the honeycomb body is ensured and faulty contacts, in particular short circuits, are avoided.
  • the mounting of the heating wires in the filter is particularly problematic at the ends of the heating conductors.
  • several heating wires must also be electrically connected to one another, and a possibility must be created to supply the electrical energy required for heating from the outside on a sufficiently large cross section.
  • a filter arrangement of the type described in the introduction that a plurality of resistance heating elements and / or their connections are connected to a fastening element which is connected to the power supply and arranged in three-dimensionally displaceable fashion in its position while maintaining a maximum distance of 30 mm from the filter surface is.
  • the fastening element is preferably on a bolt arranged essentially parallel to the direction of the channels of the filter attached, which can be moved parallel to the surface of the filter by a threaded piece with an eccentric bore opposite a cover plate.
  • the height of the fastening element above the surface of the filter can be changed by a screw thread.
  • the threaded piece has an external thread with a small pitch, which cooperates with an internal thread of the cover plate.
  • heating wires 1 are inserted into the openings of the channels of a filter body 2 in the form of a loop in such a way that they are held securely in their position even in vehicle operation.
  • the filter body 2 is installed with an insulating mat 3 in a housing 4 and supported with a bracket 14.
  • a plurality of heating wires 1 are connected at their ends to an approximately semicircular, relatively small, electrically conductive plate 10 in the present case, for example by soldering or welding. It is particularly important that the plate 10 is as close as possible to the surface of the filter body 2 is arranged securely, at most about 30 mm. This measure ensures that the heating wires or their connection ends cannot deform during current passage and corresponding heating in such a way that the stability of the arrangement is endangered and faulty contacts can occur.
  • a bolt e.g. a screw 5
  • the screw 5 is surrounded by a tube 9 made of electrically non-conductive material, preferably ceramic.
  • the screw 5 can be changed in position parallel to the surface of the filter body 2 by means of a threaded piece 11 with an eccentric bore relative to a cover plate 13.
  • the height of the plate 10 above the surface of the filter body 2 can be changed by a screw thread.
  • the threaded piece 11 has an external thread with a small pitch, which cooperates with an internal thread of the cover plate 13. This has the advantageous effect that the fastening plate 10 for the heating wires 1 can be adjusted three-dimensionally in a very precise and reliable manner and can be held in the intended position.
  • the threaded piece 11 screwed into the cover plate 13 is provided with an eccentric bore in the longitudinal axis.
  • the external thread of the threaded piece 11 has a very small pitch, so that a wide range of possible lead-through points can be covered by half a turn to the right or left, without any significant height adjustment taking place. A height adjustment can be achieved by several turns.
  • the threaded piece 11 is secured by a lock nut 12.
  • the screw 5 with the insulating tube 9 is guided through the threaded piece 11 to the outside.
  • a further insulating tube 8 is then inserted over the screw 5.
  • the screw 5, the nut 6, the cable lug 7, the insulating tubes 8 and 9, the plate 10 and the threaded piece 11 are clamped together using a commercially available cable lug 7 and a nut 6.
  • the heating wires are supplied with power via cable lug 7, screw 5 and fastening plate 10. The free ends of the heating wires are connected to the ground.
  • the meandering heating wires with their brackets or connections are reliably prevented from migrating out of them Prevented location and thereby eliminates the risk of incorrect contacts with their adverse consequences.
  • the three-dimensional adjustability of the mounting plate 10 with simultaneous insulation of the bolt 5 enables a reliable compensation of manufacturing tolerances.

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)

Claims (4)

  1. Dispositif de filtration pour éliminer des particules de suie des gaz d'échappement d'un moteur à combustion interne, en particulier d'un moteur Diesel, présentant au moins un corps filtrant en un matériau de filtration poreux, formé par des canaux de filtration mutuellement agencés en une configuration nid d'abeilles, des éléments chauffants électriques résistifs, disposés dans la région des orifices d'entrée des canaux de filtration ouverts côté admission gazeuse, étant raccordés à une alimentation électrique par l'intermédiaire d'un conducteur d'arrivée et d'un conducteur de sortie, caractérisé par le fait que plusieurs éléments chauffants résistifs (1) et/ou leurs jonctions sont relié(e)s à un élément de fixation (10) qui est connecté à la délivrance de courant et dont la position peut être localement modifiée, de manière tridimensionnelle, en respectant une distance maximale de 30 mm par rapport à la surface du filtre.
  2. Dispositif de filtration selon la revendication 1, caractérisé par le fait que l'élément de fixation (10) est implanté sur un boulon (5) qui est disposé, pour l'essentiel, parallèlement à la direction des canaux du corps filtrant (2) et dont l'emplacement peut être modifié par rapport à une plaque de recouvrement (13), parallèlement à la surface dudit corps filtrant (2), par l'intermédiaire d'une pièce filetée (11) percée d'un trou excentré.
  3. Dispositif de filtration selon la revendication 1, caractérisé par le fait que la hauteur de l'élément de fixation (10), au-dessus de la surface du corps filtrant (2), peut être modifiée par l'intermédiaire d'un filetage.
  4. Dispositif de filtration selon la revendication 2, caractérisé par le fait que la pièce filetée (11) possède un filetage externe à pas peu accentué, qui coopère avec un filetage interne de la plaque de recouvrement (13).
EP89115990A 1988-09-12 1989-08-30 Dispositif de filtrage des particules de suie de l'échappement d'un moteur à combustion interne Expired - Lifetime EP0359031B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830977A DE3830977A1 (de) 1988-09-12 1988-09-12 Filteranordnung zum entfernen von russpartikeln aus abgasen einer verbrennungskraftmaschine
DE3830977 1988-09-12

Publications (2)

Publication Number Publication Date
EP0359031A1 EP0359031A1 (fr) 1990-03-21
EP0359031B1 true EP0359031B1 (fr) 1992-09-30

Family

ID=6362788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115990A Expired - Lifetime EP0359031B1 (fr) 1988-09-12 1989-08-30 Dispositif de filtrage des particules de suie de l'échappement d'un moteur à combustion interne

Country Status (3)

Country Link
US (1) US4948403A (fr)
EP (1) EP0359031B1 (fr)
DE (2) DE3830977A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228891A (en) * 1992-01-07 1993-07-20 Pall Corporation Regenerable diesel exhaust filter
US5457945A (en) * 1992-01-07 1995-10-17 Pall Corporation Regenerable diesel exhaust filter and heater
US5470364A (en) * 1992-01-07 1995-11-28 Pall Corporation Regenerable diesel exhaust filter
DE4209213A1 (de) * 1992-03-21 1993-09-23 Fev Motorentech Gmbh & Co Kg Filteranordnung zum entfernen von russpartikeln aus abgasen einer verbrennungskraftmaschine
DE9205259U1 (de) * 1992-04-15 1992-08-27 Fritz Eichenauer GmbH + Co. KG Fabrik elektrischer Spezialartikel, 6729 Hatzenbühl Partikelrußfilter
US5655212A (en) * 1993-03-12 1997-08-05 Micropyretics Heaters International, Inc. Porous membranes
AT501888B1 (de) * 2005-06-08 2006-12-15 Fleck Carl M Dr Wabenfilter mit planaren elektroden
US7931715B2 (en) * 2007-02-12 2011-04-26 Gm Global Technology Operations, Inc. DPF heater attachment mechanisms
US8763378B2 (en) * 2007-06-15 2014-07-01 GM Global Technology Operations LLC Electrically heated particulate filter embedded heater design
US9726426B2 (en) 2012-07-11 2017-08-08 Butts Properties, Ltd. System and method for removing excess nitrogen from gas subcooled expander operations
DE102014115923A1 (de) * 2014-10-31 2016-05-04 Continental Automotive Gmbh Wabenkörper mit elektrischer Heizvorrichtung
FR3065029B1 (fr) * 2017-04-07 2019-06-21 Faurecia Systemes D'echappement Dispositif de purification de gaz d'echappement, procede de pilotage correspondant
US11015865B2 (en) 2018-08-27 2021-05-25 Bcck Holding Company System and method for natural gas liquid production with flexible ethane recovery or rejection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053165B2 (ja) * 1981-03-16 1985-11-25 株式会社豊田中央研究所 内燃機関排気吐煙の捕集装置
US4512786A (en) * 1982-04-21 1985-04-23 Mazda Motor Corporation Exhaust gas purifying device
JPS5928010A (ja) * 1982-08-05 1984-02-14 Nippon Denso Co Ltd 排気ガス浄化用構造物
US4544388A (en) * 1983-12-27 1985-10-01 Ford Motor Company Apparatus for periodically oxidizing particulates collected from exhaust gases
DE3712333A1 (de) * 1987-04-11 1988-10-20 Fev Motorentech Gmbh & Co Kg Regenerierbare filteranordnung zum entfernen von russpartikeln aus abgasen

Also Published As

Publication number Publication date
DE3830977A1 (de) 1990-03-15
EP0359031A1 (fr) 1990-03-21
US4948403A (en) 1990-08-14
DE58902370D1 (de) 1992-11-05

Similar Documents

Publication Publication Date Title
EP0359031B1 (fr) Dispositif de filtrage des particules de suie de l'échappement d'un moteur à combustion interne
EP0286932B1 (fr) Dispositif de filtrage des particules de suie de l'échappement d'un moteur à combustion
EP3212907B1 (fr) Corps en nid-d'abeilles à dispositif de chauffe électrique
DE102015111689C5 (de) Elektrisch beheizbarer Katalysator und Verfahren zu dessen Herstellung
EP0275372B1 (fr) Filtre à suie pour moteur diesel
EP1348861B1 (fr) Bride d'échauffement, en particulier pour l'échauffement de l'air dans un conduit d'admission d'un moteur à combustion interne
EP0537219B1 (fr) Procede et dispositif d'epuration des gaz d'echappement
EP2310643B1 (fr) Procédé de fonctionnement d'un dispositif comprenant au moins un corps en nid d'abeilles pouvant être chauffé électriquement
DE69111365T2 (de) Selbstheizender Aerosolfilter für Pyrolyse.
WO1994002719A1 (fr) Procede et dispositif d'elimination de particules dans des gaz d'echappement de moteurs a combustion interne
DE20016803U1 (de) Filtereinrichtung
EP1212521A1 (fr) Dispositif dote d'un element chauffant et destine a l'epuration des gaz d'echappement
EP0585432B1 (fr) Dispositif de filtration pour eliminer les particules de suie des gaz d'echappement d'un moteur a combustion interne
DE3800723C2 (fr)
DE10003816A1 (de) Regenerierbarer Partikelfilter zum Entfernen von Rußpartikeln aus Abgasen
EP0880642B1 (fr) Dispositif de purification des gaz d'echappement d'un moteur a combustion interne
WO1996041353A1 (fr) Traversee etanche aux gaz avec isolation electrique
DE4138426A1 (de) Elektrisches heizelement eines russfilters
WO1994018442A1 (fr) Traversee etanche aux gaz isolee electriquement destinee a au moins un conducteur electrique traversant une gaine metallique
DE3705979A1 (de) Abgasrussfilter
WO1991016528A1 (fr) Procede et dispositif pour l'epuration de particules contenues dans des gaz d'echappement
DE3635038A1 (de) Vorrichtung zum beseitigen von russ aus den abgasen einer brennkraftmaschine, insbesondere dieselbrennkraftmaschine
EP1260262B1 (fr) Dispositif de chauffage pour élément filtrant d'un filtre à particules et filtre à particules
DE69414817T2 (de) Honigwabenheizgerät
DE4230667C1 (de) Partikelfilter für eine Gasströmung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19900816

17Q First examination report despatched

Effective date: 19911121

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 58902370

Country of ref document: DE

Date of ref document: 19921105

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19940824

Year of fee payment: 6

EAL Se: european patent in force in sweden

Ref document number: 89115990.7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950831

EUG Se: european patent has lapsed

Ref document number: 89115990.7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960810

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960819

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970830

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970830

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000907

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050830