EP0401195B1 - Auspuffanlage, insbesondere für Zweitakt-Brennkraftmaschinen - Google Patents

Auspuffanlage, insbesondere für Zweitakt-Brennkraftmaschinen Download PDF

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Publication number
EP0401195B1
EP0401195B1 EP90890138A EP90890138A EP0401195B1 EP 0401195 B1 EP0401195 B1 EP 0401195B1 EP 90890138 A EP90890138 A EP 90890138A EP 90890138 A EP90890138 A EP 90890138A EP 0401195 B1 EP0401195 B1 EP 0401195B1
Authority
EP
European Patent Office
Prior art keywords
catalyst
sheet
internal combustion
exhaust system
metal shells
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
EP90890138A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0401195A2 (de
EP0401195A3 (de
Inventor
Franz Dipl.Ing.Dr. Laimböck
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0401195A2 publication Critical patent/EP0401195A2/de
Publication of EP0401195A3 publication Critical patent/EP0401195A3/de
Application granted granted Critical
Publication of EP0401195B1 publication Critical patent/EP0401195B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N3/08—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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the invention relates to an exhaust system, in particular for two-stroke internal combustion engines, of which at least the part adjoining the internal combustion engine consists of two joined sheet metal shells and contains a catalytic converter.
  • Exhaust systems of this type are distinguished by relatively simple and inexpensive production options.
  • exhaust systems that contain a catalyst to reduce exhaust gas emission it is difficult to quickly start or ignite the catalyst, e.g. B. at cold start, on the one hand and a corresponding durability with longer full-load operation, because the high temperatures can damage the catalytic converter over a long period of time.
  • a pipeline in particular for an exhaust pipe, which consists of at least two parallel individual pipes, which are pressed flat on one side and connected to one another with the plane surfaces formed thereby.
  • the facing flat surfaces can be perforated and acoustic or thermal insulation can be provided between them.
  • catalytic effect there is no catalytic effect here.
  • the invention has for its object to improve the exhaust system described above so that there is a particularly simple design, without having to accept adverse gas dynamic effects even if the catalyst is arranged in close proximity to the engine to prevail there to achieve rapid starting or ignition at higher temperatures.
  • the invention achieves the stated object in that the catalytic converter is designed as a catalytically coated, optionally perforated middle wall running between the sheet metal shells in the flow direction.
  • Such a central wall does not constitute an installation which interferes with the gas dynamic effect, and it can also be easily installed in one operation when the two sheet metal shells forming the exhaust system are joined together.
  • the exclusive use of such a catalyst is readily possible. If higher exhaust gas requirements are placed on the internal combustion engine, a conventional main catalytic converter will be arranged after the central wall according to the invention, so that the central wall then only serves as a pre-catalytic converter which extends so far towards the cylinder outlet opening that very rapid ignition is ensured.
  • the openings in the middle wall serve to equalize the pressure between the two cross-sectional halves of the exhaust system.
  • the catalyst design according to the invention is particularly suitable for two-stroke internal combustion engines with a manifold designed as a diffuser.
  • the central wall forming the catalytic converter is held with spaced-apart projections between the joined, preferably -welded, sheet metal shell shelves by different thermal expansions To be taken into account, since the central wall naturally reaches significantly higher temperatures than the sheet metal shells.
  • the sheet metal shells have an outer insulation which preferably consists of a casing and an intermediate insulating layer and which is welded to the sheet metal shell rims.
  • the outer insulation can be easily installed in the production of the relevant plant part in one operation when the sheet metal shells are connected by roller welding with simultaneous installation of the middle wall.
  • a two-stroke internal combustion engine 1 is equipped with an exhaust system, of which the part 2, which is directly connected to the internal combustion engine 1 and is designed as a curved diffuser, consists of two joined sheet metal shells 3. These sheet metal shells 3 each have a rim 4 with which they are welded. A part 5, in which a main catalytic converter 6 is arranged, adjoins part 2 of the exhaust system. Between the two sheet metal shells 3 there is arranged a catalytically coated central wall 7 running in the direction of flow, which serves as a pre-catalyst and is optionally provided with openings 8, which may also have a slot shape.
  • the middle wall 7 is only held between the sheet metal shell rims 4 with spaced-apart projections 9.
  • part 2 of the system can also be provided with external insulation, which consists of a casing 10 and an intermediate insulating layer 11. This outer insulation 10, 11 is welded to the sheet metal shell rims 4.
  • the exhaust system according to the invention also offers the possibility of designing spatially curved diffusers, in which case the diffusers are composed of several mutually angularly offset sections and the center wall does not pass through in one plane.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
EP90890138A 1989-06-01 1990-05-08 Auspuffanlage, insbesondere für Zweitakt-Brennkraftmaschinen Expired - Lifetime EP0401195B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0133089A AT396170B (de) 1989-06-01 1989-06-01 Auspuffanlage fuer zweitakt-brennkraftmaschinen
AT1330/89 1989-06-01

Publications (3)

Publication Number Publication Date
EP0401195A2 EP0401195A2 (de) 1990-12-05
EP0401195A3 EP0401195A3 (de) 1991-03-06
EP0401195B1 true EP0401195B1 (de) 1993-03-31

Family

ID=3511567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90890138A Expired - Lifetime EP0401195B1 (de) 1989-06-01 1990-05-08 Auspuffanlage, insbesondere für Zweitakt-Brennkraftmaschinen

Country Status (6)

Country Link
US (1) US5014510A (es)
EP (1) EP0401195B1 (es)
JP (1) JPH0318611A (es)
AT (1) AT396170B (es)
DE (1) DE59001101D1 (es)
ES (1) ES2040105T3 (es)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920007887B1 (ko) * 1989-08-29 1992-09-18 스즈키 지도오샤 고오교오 가부시키가이샤 내연기관의 배기가스 정화장치
DE3939921A1 (de) * 1989-12-02 1991-06-06 Degussa Anordnung zur katalytischen reinigung der auspuffgase von verbrennungsmotoren, insbesondere nach dem zweitaktprinzip
JP2952997B2 (ja) * 1990-08-27 1999-09-27 スズキ株式会社 排気ガス浄化装置
JP3314241B2 (ja) * 1992-04-06 2002-08-12 ヤマハ発動機株式会社 自動二輪車用エンジンの排気浄化装置
JP3089576B2 (ja) * 1992-11-27 2000-09-18 三信工業株式会社 船外機の排気装置
DE9318864U1 (de) * 1993-12-09 1994-03-17 Scholl, Gert, Dipl.-Ing., 61440 Oberursel Auspuff-Endrohr für Kraftfahrzeuge mit Ottomotor
US5521339A (en) * 1994-11-18 1996-05-28 Wci Outdoor Products, Inc. Catalyst muffler system
JP3491424B2 (ja) * 1996-01-26 2004-01-26 ヤマハ発動機株式会社 船舶用エンジン
US7281606B2 (en) 1998-08-18 2007-10-16 Marocco Gregory M Exhaust sound and emission control systems
US6935461B2 (en) * 1998-08-18 2005-08-30 Gregory M. Marocco Exhaust sound and emission control systems
US7549511B2 (en) * 1998-08-18 2009-06-23 Marocco Gregory M Exhaust sound and emission control systems
US6651773B1 (en) 2002-09-24 2003-11-25 Gregory M. Marocco Exhaust sound attenuation and control system
DE19921609A1 (de) * 1999-05-10 2000-11-16 Emitec Emissionstechnologie Wabenkörperanordnung mit verschiedenen Abschnitten in einem Mantelrohr
CA2453835A1 (en) * 2003-01-29 2004-07-29 Bombardier-Rotax Gmbh & Co. Kg Pre-converter device for cleaning exhaust gas for an internal combustion engine
US20100077742A1 (en) * 2008-09-30 2010-04-01 Gm Global Technology Operations Flow diffuser for an exhaust system
IT201700061755A1 (it) * 2017-06-06 2018-12-06 Vins S R L Motore termico a combustione interna a due tempi con catalizzatore allo scarico

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948046A (en) * 1973-02-21 1976-04-06 Don F. Seyferth Anti-pollution device for treating exhaust from internal combustion engines
US4195063A (en) * 1974-09-03 1980-03-25 Matsushita Electric Industrial Co., Ltd. Catalyst element for cleaning exhaust gases
JPS5332223A (en) * 1976-09-07 1978-03-27 Matsushita Electric Ind Co Ltd Catalyst type exhaust gas purifying means for internal combustion engine
GB1567593A (en) * 1976-10-20 1980-05-21 Matsushita Electric Ind Co Ltd Exhaust gas control equipment
DE2658892A1 (de) * 1976-12-24 1978-07-06 Degussa Vorrichtung zur katalytischen reinigung von abgasen
JPS53117120A (en) * 1977-03-23 1978-10-13 Matsushita Electric Ind Co Ltd Catalytic exhaust gas purifier
DE2853912A1 (de) * 1978-12-14 1980-07-03 Audi Nsu Auto Union Ag Abgasleitung fuer eine brennkraftmaschine
JPS55164714A (en) * 1979-06-08 1980-12-22 Mitsubishi Motors Corp Catalytic converter
DE2942728A1 (de) * 1979-10-23 1981-05-07 Bremshey Ag, 5650 Solingen Doppelwandige auspuffrohrleitung
US4625511A (en) * 1984-08-13 1986-12-02 Arvin Industries, Inc. Exhaust processor
FR2586753A1 (fr) * 1985-09-04 1987-03-06 Peugeot Cycles Dispositif de controle des gaz d'echappement d'un moteur a combustion interne
SE454101B (sv) * 1986-03-10 1988-03-28 Sven Runo Vilhelm Gebelius Avgassystem vid forbrenningsmotor
FR2633366B1 (fr) * 1988-06-27 1990-10-12 Rosi Ets Tubulure, notamment pour fluides a haute temperature
FR2633664B3 (fr) * 1988-07-08 1990-06-08 Piaggio & C Spa Dispositif d'echappement des produits de combustion pour moteur a deux temps

Also Published As

Publication number Publication date
US5014510A (en) 1991-05-14
EP0401195A2 (de) 1990-12-05
AT396170B (de) 1993-06-25
JPH0318611A (ja) 1991-01-28
DE59001101D1 (de) 1993-05-06
EP0401195A3 (de) 1991-03-06
ATA133089A (de) 1992-10-15
ES2040105T3 (es) 1993-10-01

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