DE19728870A1 - Deformable silencer for engine exhaust system - Google Patents

Deformable silencer for engine exhaust system

Info

Publication number
DE19728870A1
DE19728870A1 DE19728870A DE19728870A DE19728870A1 DE 19728870 A1 DE19728870 A1 DE 19728870A1 DE 19728870 A DE19728870 A DE 19728870A DE 19728870 A DE19728870 A DE 19728870A DE 19728870 A1 DE19728870 A1 DE 19728870A1
Authority
DE
Germany
Prior art keywords
silencer
exhaust system
deformable
exhaust
engine exhaust
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Withdrawn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
DE19728870A
Other languages
German (de)
Inventor
Joerg Dr Ing Abthoff
Wolf Dr Ing Boll
Reinhard Dipl Ing Steinkaemper
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.)
Mercedes Benz Group AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19728870A priority Critical patent/DE19728870A1/en
Publication of DE19728870A1 publication Critical patent/DE19728870A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
    • 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
    • F01N13/16—Selection of particular materials
    • 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/22—Flexible elastomeric material
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)

Abstract

The silencer is made of a deformable material, and has a casing (6,7) which is made of a fibre braid (9) of heat-resistant material. The fibres may be of steel, glass or a mixture of the two, and the casing may be partially gas-permeable. The system (1) includes an exhaust manifold (2) connected by exhaust pipes (3,4) to a catalytic converter (5). The exhaust manifold is also connected to the two silencers, the middle one (6) and the end one (7), with a tailpipe (8). The end silencer can also serve as a gas cleaner.

Description

Die Erfindung bezieht sich auf einen aus einem verformbaren Werkstoff bestehenden Schalldämpfer für eine Abgasanlage einer Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a deformable Material existing silencer for an exhaust system Internal combustion engine according to the preamble of patent claim 1.

Aus der DE 25 53 280 A1 ist ein gattungsgemäßer verformbarer Schalldämpfer bekannt, der aus Dämpferkammern besteht, die aus einem elastischen Material bestehen und deren Gaseintritts- bzw. Gasaustrittsöffnungen mit elastischen Klappen verschlossen sind.From DE 25 53 280 A1 a generic deformable is Muffler known, which consists of damper chambers that consist of an elastic material and their gas inlet or gas outlet openings closed with elastic flaps are.

Zum allgemeinen technischen Hintergrund wird noch auf die DE 41 37 104 A1 und die DE 37 24 087 A1 verwiesen.For the general technical background, the DE 41 37 104 A1 and DE 37 24 087 A1 referenced.

Es ist die Aufgabe der Erfindung, einen bekannten Schalldämpfer derart weiterzubilden, daß eine bessere Fahrzeugraumnutzung für die Fahrzeugabgasanlage erreicht wird.It is the object of the invention to provide a known silencer to further develop such that better use of vehicle space for the vehicle exhaust system is reached.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 1 gegebenen Merkmale gelöst.This object is achieved by the in the characteristic of Features given claim 1 solved.

Ein wesentlicher Vorteil der Erfindung besteht in der durch das hitzebeständige Fasergeflecht ermöglichten Verformbarkeit bzw. Rückverformbarkeit des Schalldämpfers und der dadurch erreich­ ten besseren Fahrzeugraumnutzung. Dadurch kann beispielsweise ein Endschalldämpfer trotzdem im Bereich eines häufig von Baga­ tellunfällen betroffenen Fahrzeughecks installiert werden, da er nach einer unfallbedingten Verformung wieder seine Ur­ sprungsform einnehmen kann. A major advantage of the invention is that heat-resistant fiber braid enables deformability or Resilience of the muffler and thereby achieved better use of vehicle space. This can, for example a rear silencer nevertheless in the range of a Baga frequently the rear of the vehicle affected by accidents, because after an accident-related deformation, it returned to its original shape can take the form of a jump.  

In einer besonders vorteilhaften Weiterführung der Erfindung besteht das Fasergeflecht des Schalldämpfers aus Glasfasern, wie sie beispielsweise von Feuerschutzanzügen bekannt sind. Die Glasfasern sind korrosionsbeständig und dämmen von Natur aus den Schall, da sie biegeschlaff sind. Aufgrund dieser Eigenschaft können aus Glasfasern hergestellte Schalldämpfer auch zur me­ chanischen Abkoppelung von Schwingungen im Abgassystem, bei­ spielsweise in der Anwendung als Mittelschalldämpfer, dienen. Ferner wird auch die Luftschallabstrahlung des Abgasrohrlei­ tungssystems vermindert.In a particularly advantageous development of the invention the silencer's fiber mesh consists of glass fibers, as they are known for example from fire protection suits. The Glass fibers are corrosion-resistant and naturally insulate the Sound because they are limp. Because of this property Mufflers made of glass fibers can also be used for me mechanical decoupling of vibrations in the exhaust system, at for example in use as a central silencer. Furthermore, the airborne sound radiation of the exhaust pipe is also system is reduced.

Gemäß einer weiteren Ausgestaltung der Erfindung kann der Schalldämpfer auch aus einem Geflecht aus dünnen Stahldrähten oder einer Mischung aus Glasfasern und Stahldrähten bestehen, wobei beispielsweise der Stahlanteil die elastisch rückverform­ bare Grundform gewährleistet, während beispielsweise der Glas­ faseranteil für die Dichtigkeit sowie Gewichts- und Kostenmin­ derung sorgt.According to a further embodiment of the invention, the Silencer also made of a network of thin steel wires or a mixture of glass fibers and steel wires, where, for example, the steel portion resiliently deforms bare basic shape ensures, for example, the glass fiber content for tightness as well as weight and cost min change.

In einer weiteren Ausgestaltung der Erfindung sind zumindest Teile des Schalldämpfergehäuses gasdurchlässig, wodurch vor­ teilhafterweise ein Endschalldämpfer auch ohne Endrohr ausge­ führt werden kann. Diese Ausgestaltung führt zudem zu einer Verminderung des Mündungsgeräusches. Bekanntermaßen haben bei­ spielsweise Doppelauspuffrohre geringere Abgasgeräusche als einrohrige, da sich das Abgasgeräusch mit der Zahl der Öffnun­ gen vermindert.In a further embodiment of the invention, at least Parts of the muffler housing gas permeable, which prevents partially a rear silencer without a tailpipe can be led. This configuration also leads to a Reduction of the muzzle noise. Known to have for example double exhaust pipes lower exhaust noise than single-pipe, since the exhaust noise changes with the number of openings gene reduced.

Weitere Ausgestaltungen und Vorteile der Erfindung gehen aus der Beschreibung hervor.Further configurations and advantages of the invention go out the description.

In der einzigen Figur ist im folgenden ein Ausführungsbeispiel mit weiteren Einzelheiten näher erläutert. Sie zeigt eine Ab­ gasanlage 1 einer nicht näher dargestellten Brennkraftmaschine. Die Abgasanlage 1 umfaßt einen an die Brennkraftmaschine an­ geflanschten Auspuffkrümmer 2, der jeweils über Abgasrohre 3, 4 mit einem Katalysator 5 und mit zwei aufeinanderfolgenden, aus einem verformbaren Werkstoff bestehenden Schalldämpfern 6, 7 verbunden ist.In the single figure, an exemplary embodiment is explained in more detail below with further details. It shows a gas system 1 from an internal combustion engine, not shown. The exhaust system 1 comprises an exhaust manifold 2 flanged to the internal combustion engine, each of which is connected via exhaust pipes 3 , 4 to a catalytic converter 5 and to two successive silencers 6 , 7 made of a deformable material.

Die Schalldämpfer 6, 7 umfassen einen Mittelschalldämpfer 6 und einen Endschalldämpfer 7 mit Endrohr 8. Das Gehäuse beider Schalldämpfer 6, 7 besteht aus einem Fasergeflecht 9, das aus einem hitzebeständigen Werkstoff hergestellt ist, wobei der Werkstoff eine rückverformbare Grundform des Schalldämpfers 6, 7 beispielsweise nach einem Unfall gewährleistet. Bei dem Werk­ stoff des Fasergeflechtes 9 kann es sich sowohl um Stahlfasern oder Glasfasern als auch um ein Gemisch von beidem handeln. Im übrigen sind auch andere rückverformbare Fasermaterialien bzw. Mischungen denkbar, welche die sonstigen für den Einsatz als Schalldämpfer in einer Abgasanlage erforderlichen Eigenschaf­ ten, wie beispielsweise Hitzebeständigkeit und Dichtigkeit, aufweisen.The silencers 6 , 7 comprise a middle silencer 6 and an end silencer 7 with a tailpipe 8 . The housing of both silencers 6 , 7 consists of a fiber mesh 9 , which is made of a heat-resistant material, the material ensuring a deformable basic shape of the silencer 6 , 7, for example after an accident. The material of the fiber braid 9 can be steel fibers or glass fibers as well as a mixture of both. In addition, other reshapable fiber materials or mixtures are conceivable, which have the other properties required for use as a silencer in an exhaust system, such as heat resistance and tightness.

In einer weiteren Ausgestaltung kann der Endschalldämpfer 7 auch ohne Endrohr 8 ausgeführt werden, indem das Schalldämpfer­ gehäuse zumindest teilweise gasdurchlässig ist. Hierbei ist die Porosität derart gestaltet, daß das über das Abgasrohr 4 in den Endschalldämpfer 7 eingeströmte Abgas gleichmäßig über die Oberfläche oder an speziell dafür vorgesehenen Durchdringungs­ flächen (z. B. die Unter- oder Rückseite) des Schalldämpfers 7 aus dem Fasergeflecht 9 austritt.In a further embodiment, the rear silencer 7 can also be designed without a tail pipe 8 , in that the silencer housing is at least partially gas-permeable. Here, the porosity is designed such that the exhaust gas flowing in through the exhaust pipe 4 into the muffler 7 exits the fiber mesh 9 evenly over the surface or at specially provided penetration surfaces (e.g. the bottom or rear) of the muffler 7 .

Desweiteren können Schalldämpfer innen ebenfalls aus gewirkten Kammern bestehen, wobei die Trennwände zwischen den Kammern Reusenform haben können und mit den Außenwänden verbunden sind.Furthermore, silencers can also be knitted on the inside Chambers exist, the partitions between the chambers Can have a trap shape and are connected to the outer walls.

Ferner kann insbesondere der Endschalldämpfer 7 als Abgasreini­ gungselement ausgebildet sein, indem die Innenflächen des Ge­ häuses bzw. der Kammern und der Trennwände mit katalytisch ak­ tivem Speichermaterial (z. B. Kupfer) beschichtet werden.Furthermore, in particular the rear silencer 7 can be designed as an exhaust gas cleaning element by coating the inner surfaces of the housing or the chambers and the partition walls with catalytically active storage material (for example copper).

Claims (5)

1. Aus einem verformbaren Werkstoff bestehender Schalldämpfer für eine Abgasanlage einer Brennkraftmaschine, dadurch gekennzeichnet, daß zumindest das Gehäuse des Schalldämpfers (6, 7) aus ei­ nem Fasergeflecht (9) aus einem hitzebeständigen Werkstoff be­ steht.1. From a deformable material existing silencer for an exhaust system of an internal combustion engine, characterized in that at least the housing of the silencer ( 6 , 7 ) from egg nem fiber braid ( 9 ) is made of a heat-resistant material. 2. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das Fasergeflecht (9) aus Stahlfasern besteht.2. Silencer according to claim 1, characterized in that the fiber braid ( 9 ) consists of steel fibers. 3. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das Fasergeflecht (9) aus Glasfasern besteht.3. Muffler according to claim 1, characterized in that the fiber braid ( 9 ) consists of glass fibers. 4. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das Fasergeflecht (9) aus einem Gemisch von Stahlfasern und Glasfasern besteht.4. Silencer according to claim 1, characterized in that the fiber braid ( 9 ) consists of a mixture of steel fibers and glass fibers. 5. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse des Schalldämpfers (6, 7) zumindest teil­ weise gasdurchlässig ist.5. Silencer according to claim 1, characterized in that the housing of the silencer ( 6 , 7 ) is at least partially gas-permeable.
DE19728870A 1997-07-05 1997-07-05 Deformable silencer for engine exhaust system Withdrawn DE19728870A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19728870A DE19728870A1 (en) 1997-07-05 1997-07-05 Deformable silencer for engine exhaust system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19728870A DE19728870A1 (en) 1997-07-05 1997-07-05 Deformable silencer for engine exhaust system

Publications (1)

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DE19728870A1 true DE19728870A1 (en) 1999-01-07

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DE19728870A Withdrawn DE19728870A1 (en) 1997-07-05 1997-07-05 Deformable silencer for engine exhaust system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143055A2 (en) 2000-04-05 2001-10-10 Drafas GmbH Moldable stitchweave composite
WO2005049982A1 (en) * 2003-11-21 2005-06-02 Vale S.R.L. Sock-shaped fabric element, used for containing sound absorbent material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2067664A (en) * 1980-01-16 1981-07-30 Nissan Motor Ic engine intake and exhaust silencers
DE3724315A1 (en) * 1986-08-08 1988-02-18 Tenneco Inc MUFFLER
DE4137104A1 (en) * 1991-11-12 1993-05-13 Schwaebische Huettenwerke Gmbh MUFFLER
JPH07127429A (en) * 1993-10-29 1995-05-16 Isuzu Motors Ltd Noise reducing device for exhaust pipe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2067664A (en) * 1980-01-16 1981-07-30 Nissan Motor Ic engine intake and exhaust silencers
DE3724315A1 (en) * 1986-08-08 1988-02-18 Tenneco Inc MUFFLER
DE4137104A1 (en) * 1991-11-12 1993-05-13 Schwaebische Huettenwerke Gmbh MUFFLER
JPH07127429A (en) * 1993-10-29 1995-05-16 Isuzu Motors Ltd Noise reducing device for exhaust pipe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143055A2 (en) 2000-04-05 2001-10-10 Drafas GmbH Moldable stitchweave composite
DE10016841A1 (en) * 2000-04-05 2001-10-18 Drafas Gmbh Formable mesh fabric composite
EP1143055A3 (en) * 2000-04-05 2002-05-22 Drafas GmbH Moldable stitchweave composite
WO2005049982A1 (en) * 2003-11-21 2005-06-02 Vale S.R.L. Sock-shaped fabric element, used for containing sound absorbent material

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Owner name: DAIMLERCHRYSLER AG, 70567 STUTTGART, DE

8139 Disposal/non-payment of the annual fee