EP1012455B1 - Katalytischer konverter für einen kleinmotor - Google Patents

Katalytischer konverter für einen kleinmotor Download PDF

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Publication number
EP1012455B1
EP1012455B1 EP97950069A EP97950069A EP1012455B1 EP 1012455 B1 EP1012455 B1 EP 1012455B1 EP 97950069 A EP97950069 A EP 97950069A EP 97950069 A EP97950069 A EP 97950069A EP 1012455 B1 EP1012455 B1 EP 1012455B1
Authority
EP
European Patent Office
Prior art keywords
stack
silencer housing
catalytic converter
housing
sheet metal
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
EP97950069A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1012455A2 (de
Inventor
Rolf BRÜCK
Wolfgang Maus
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
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 Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP1012455A2 publication Critical patent/EP1012455A2/de
Application granted granted Critical
Publication of EP1012455B1 publication Critical patent/EP1012455B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/40—Honeycomb supports characterised by their structural details made of a single sheet, foil or plate
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/02—Fitting monolithic blocks into the housing

Definitions

  • the present invention relates to a catalytic converter for a Small engine, in which in a silencer housing close to the engine arranged a honeycomb body coated with catalytically active material is.
  • DE-OS 38 29 668 is already an example of an exhaust silencer specified for two-stroke engines, which one inside contains catalytic converter for exhaust gas cleaning.
  • EP 0 470 113 B1 also discloses a metallic catalyst carrier body known, in particular for attachment in the partition of a Muffler housing is suitable.
  • the object of the present invention is therefore a catalytic converter for a small engine that is very inexpensive to manufacture, as small as possible constructive changes to existing small motors and their Exhaust systems require, and yet a significant proportion of pollutants can catalytically remove from the exhaust gas.
  • Advantageous configurations are in the dependent Claims specified.
  • Catalytic converters usually contain honeycomb bodies to order in one Partial volume of the exhaust system has a sufficiently large surface area for one To provide catalytic implementation.
  • honeycomb bodies are particularly made of sheet metal, at least part of which Metal sheets is structured so that it is permeable to exhaust gas Channels result.
  • alternating smooth and wavy Sheet metal layers used.
  • sheet metal layers with two different corrugations or sheet layers with alternating oblique to each other arranged corrugations can be used.
  • honeycomb bodies are sometimes under one Bias is inserted into a casing tube or housing, however the channels generally not or only to a small extent plastically deformed. According to the solution according to the invention, this is the way for catalytic converters of small engines left to manufacture to simplify drastically.
  • Muffler housings for small engines show in generally a larger volume than for the accommodation of a Catalyst carrier body is necessary for complete exhaust gas purification.
  • this method has preferred exemplary embodiments is described, many manufacturing advantages and leads to a simple but durable catalytic converter.
  • a silencer housing for small engines consists of two or more individual parts, especially half shells and a partition, which by means of a simple connection process, e.g. B. flanging or Weld, be joined together. These housing parts can Assembling used simultaneously for the shaping of the honeycomb body without additional tools.
  • a stack of Sheet layers with a larger volume than the partial volume to be filled in Muffler housing is easy to put on when assembling the housing the intended place and when assembling the housing parts in its final position and shape squeezed. Even if 15 to 30% of the Channels are plastically and / or elastically deformed, namely on the side ends of the stack and in the outer edge areas, so stay enough cells permeable to gas, so that an effective catalytic Cleaning is ensured.
  • the sheets are in front the installation in the silencer housing already with catalytically active Material are coated, either by already for the entire production coated sheets can be used, or by placing a prefabricated stack of sheet metal layers as a whole is coated.
  • a major advantage of the catalytic converter according to the invention is that the considerable deformation of the channels is partly plastic and is partially elastic, so that the honeycomb body is under a prestress remains in all operating conditions, especially thermal Alternating loads, loosening of the sheet layers prevented.
  • the honeycomb body should be under maximum prestress, since it is everywhere over the Elastic limit is deformed. This prevents relative movements between the sheet layers even with decreasing temperature Elasticity.
  • the one to be squeezed into the muffler housing Stack in its original form to the shape of the form to be filled out Partial volume and the degree of deformation to be expected during crushing of the individual areas is adapted, although the volume of the Stacks at least 5%, preferably at least 10% larger than that partial volume to be filled.
  • Figure 1 shows schematically in longitudinal section a silencer housing 3 for a small engine.
  • the exhaust gas enters the exhaust gas inlet 1
  • Lower part 3.2 of the muffler housing from where it through openings in a partition 3.3 in the upper part 3.1 of the muffler housing. From here it flows through the channels 7 of a honeycomb body 4 and arrives then to the exhaust outlet 2.
  • Upper part 3.1 and lower part 3.2 of the muffler housing and the partition 3.3 are in the area of a partial joint 3.4 connected to each other, for example by flanging or by a Weld.
  • Figure 2 illustrates schematically in cross section the joining of Upper part 3.1, lower part 3.2, partition 3.3 of the silencer housing and a stack 8 of sheet metal layers 5, 6, the process of joining is indicated by arrows.
  • the stack 8 is in the present exemplary embodiment from alternately arranged individual smooth sheet metal layers 5 and corrugated sheet metal layers 6, which together form a variety of for form the exhaust gas-permeable channels 7.
  • the sheet layers 5, 6 are with coated catalytically active material 10. This coating can either already in a continuous process before all other processing steps be applied to the sheet metal layers 5, 6, or after Layers of the stack 8 are applied together.
  • FIG 3 shows in cross section along the line III-III in Figure 1 in essentially completely assembled silencer housing with crimped Honeycombs. It can be seen that the lateral ends 9 of the in FIG stack 8, still undeformed, are now squeezed together, and also numerous in the edge areas of the honeycomb body Channels 7.1 are plastically deformed. Nevertheless remain, especially in inner area of the honeycomb body, still not sufficiently plastically deformed Channels which are used for the catalytic conversion of Sufficient exhaust gas. However, these channels 7 are through on the whole Honeycomb body squeezing forces deformed considerably elastically, so that the whole honeycomb body is under considerable prestress.
  • the pinched lateral ends 9 of the sheet stack are between the upper part 3.1 and partition 3.3 of the silencer housing and can included in the usual connection technology of the silencer housing become. As shown on the right side of Figure 3, this can be a Flanging will be 3.5. But one is also possible on the left side of the Figure 3 indicated weld connection 3.6, which the ends of the sheet metal layers 5, 6 of the upper part 3.1, the lower part 3.2 and the partition 3.3 involves.
  • Figures 4, 5, 6, 7 and 8 are different starting forms for the honeycomb body 4 to be integrated into the silencer housing 3 as a selection of the total possible shapes.
  • Figure 4 shows one Trapezoidal sheet metal stack 11, from smooth sheet metal layers 5 and corrugated Sheet metal layers 6, 11 in the lateral end regions 9 of the sheet stack those sheet layers are longer, the ends of which are up to the parting line have a longer route after assembly. That way ensures that the ends of practically all sheet metal layers are held securely can be.
  • 5 shows a meandering stack of sheets 12.1, in which a corrugated sheet layer 6 is layered in a meandering manner, whereby individual smooth sheets 5 are arranged between the individual layers are.
  • Figure 6 shows a similar configuration is shown in Figure 6, there however, only a single sheet, which is smooth and corrugated in sections is layered to a meandering stack of sheets 12.2.
  • Figure 7 shows an oval sheet stack 13 of a smooth 5 and a corrugated Sheet 6 as a starting stack. Such a stack can be conventional Way by flattening a wound with a cylindrical cavity spiral sheet stack can be achieved.
  • Figure 8 finally shows a particularly preferred embodiment, at who only included the smooth sheet metal layers 5 in the connection of the parting line should be. For this reason, the ends of the smooth sheet metal layers to different distances, according to their way to the parting line.
  • the corrugated sheet layers 6 are shorter and in their respective length Cross-sectional shape of the muffler housing adapted and again with a certain excess of volume, which is later replaced by plastic Deformation is reduced, equipped.
  • the smooth 5 and the corrugated sheet layers 6 with a positive fit interlocking structures are particularly suitable for this microstructures running transversely to the flow direction, such as those from the State of the art are known.
  • the present invention creates the by inexpensive manufacturing technology Possibility of broad-based exhaust gas catalytic converters even for small engines to be able to apply to the environment and the operating personnel of the Relieve small engines.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
EP97950069A 1996-11-08 1997-11-03 Katalytischer konverter für einen kleinmotor Expired - Lifetime EP1012455B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19646242 1996-11-08
DE19646242A DE19646242C2 (de) 1996-11-08 1996-11-08 Katalytischer Konverter für einen Kleinmotor
PCT/EP1997/006044 WO1998021453A2 (de) 1996-11-08 1997-11-03 Katalytischer konverter für einen kleinmotor

Publications (2)

Publication Number Publication Date
EP1012455A2 EP1012455A2 (de) 2000-06-28
EP1012455B1 true EP1012455B1 (de) 2002-03-20

Family

ID=7811120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97950069A Expired - Lifetime EP1012455B1 (de) 1996-11-08 1997-11-03 Katalytischer konverter für einen kleinmotor

Country Status (12)

Country Link
US (1) US6403039B1 (zh)
EP (1) EP1012455B1 (zh)
JP (1) JP3251299B2 (zh)
KR (1) KR100495383B1 (zh)
CN (1) CN1093908C (zh)
AU (1) AU5316098A (zh)
DE (2) DE19646242C2 (zh)
ES (1) ES2174315T3 (zh)
MY (1) MY122028A (zh)
RU (1) RU2160371C1 (zh)
TW (1) TW364038B (zh)
WO (1) WO1998021453A2 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7090487B2 (en) * 2002-01-22 2006-08-15 Catacel Corp. Catalytic combustor having high cell density
DE10339468B4 (de) * 2003-08-27 2008-11-13 Oberland Mangold Gmbh Katalysatorkörper und Abgasanlage für einen Kleinmotor sowie Verfahren zur Herstellung des Katalysatorkörpers
DE10345910A1 (de) * 2003-10-02 2005-04-21 Emitec Emissionstechnologie Verfahren zur Herstellung eines metallischen Wabenköpers mit einer Lagenlängendifferenz
US7464543B2 (en) * 2004-05-25 2008-12-16 Cameron International Corporation Two-stroke lean burn gas engine with a silencer/catalytic converter
DE102005028044A1 (de) * 2005-06-17 2006-12-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Herstellung von, insbesondere großen, Wabenkörpern für die mobile Abgasnachbehandlung
DE102010039082A1 (de) * 2010-08-09 2012-02-09 Behr Gmbh & Co. Kg Verfahren zur Herstellung eines Abgaswärmetauschers für ein Kraftfahrzeug
US9388718B2 (en) 2014-03-27 2016-07-12 Ge Oil & Gas Compression Systems, Llc System and method for tuned exhaust
DE102017205147B4 (de) 2017-03-27 2019-04-04 Continental Automotive Gmbh Verfahren zur Herstellung eines Wabenkörpers
US10385745B2 (en) * 2017-10-23 2019-08-20 Honda Motor Co., Ltd. Exhaust purifying device for internal combustion engine

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094645A (en) * 1977-01-24 1978-06-13 Uop Inc. Combination muffler and catalytic converter having low backpressure
DE2856030C2 (de) * 1978-12-23 1987-02-12 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Verfahren zum Herstellen einer aus Metallfolien gewickelten Trägermatrix für eine Abgaspatrone
DE3532408A1 (de) * 1985-09-11 1987-03-19 Sueddeutsche Kuehler Behr Traegermatrix, insbesondere fuer einen katalytischen reaktor zur abgasreinigung bei brennkraftmaschinen
DE3729477C3 (de) * 1987-09-03 1999-09-09 Stihl Maschf Andreas Abgasschalldämpfer für Zweitaktmotoren, insbesondere für tragbare Arbeitsgeräte wie Motorkettensägen
FR2624202A1 (fr) * 1987-12-08 1989-06-09 Stihl Andreas Silencieux pour moteurs a deux temps
DE3829668C3 (de) * 1987-12-08 1998-08-13 Stihl Maschf Andreas Abgasschalldämpfer für einen Zweitaktmotor in einem tragbaren Arbeitsgerät
US4894987A (en) * 1988-08-19 1990-01-23 Ap Parts Manufacturing Company Stamp formed muffler and catalytic converter assembly
DE8905415U1 (de) * 1989-04-28 1990-08-30 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar In einer Trennwand befestigter metallischer Katalysator-Trägerkörper
JPH04122418A (ja) * 1990-09-13 1992-04-22 Nippon Steel Corp 自動車排ガス浄化用触媒コンバータ
JP2603033B2 (ja) * 1991-08-30 1997-04-23 ブリッグス アンド ストラットン コーポレイション 排気装置用マフラ
DE4243079C2 (de) * 1992-12-18 1996-03-14 Oberland Mangold Gmbh Wabenkörper und Verfahren zu seiner Herstellung
US5548955A (en) * 1994-10-19 1996-08-27 Briggs & Stratton Corporation Catalytic converter having a venturi formed from two stamped components
US6109386A (en) * 1998-02-03 2000-08-29 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Honeycomb body with a flattened cross-sectional region and a method for producing the honeycomb body
JP4122418B2 (ja) * 1998-02-17 2008-07-23 東芝電池株式会社 空気亜鉛電池

Also Published As

Publication number Publication date
EP1012455A2 (de) 2000-06-28
RU2160371C1 (ru) 2000-12-10
CN1093908C (zh) 2002-11-06
KR100495383B1 (ko) 2005-06-14
ES2174315T3 (es) 2002-11-01
DE59706715D1 (de) 2002-04-25
JP2001505274A (ja) 2001-04-17
WO1998021453A2 (de) 1998-05-22
KR20000053136A (ko) 2000-08-25
WO1998021453A3 (de) 1999-12-23
US6403039B1 (en) 2002-06-11
AU5316098A (en) 1998-06-03
TW364038B (en) 1999-07-11
MY122028A (en) 2006-03-31
CN1258336A (zh) 2000-06-28
JP3251299B2 (ja) 2002-01-28
DE19646242A1 (de) 1998-05-14
DE19646242C2 (de) 2001-02-22

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