EP0023041A1 - External housing for an internal combustion engine silencer - Google Patents

External housing for an internal combustion engine silencer Download PDF

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Publication number
EP0023041A1
EP0023041A1 EP80104246A EP80104246A EP0023041A1 EP 0023041 A1 EP0023041 A1 EP 0023041A1 EP 80104246 A EP80104246 A EP 80104246A EP 80104246 A EP80104246 A EP 80104246A EP 0023041 A1 EP0023041 A1 EP 0023041A1
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EP
European Patent Office
Prior art keywords
outer housing
housing according
pipe
tube
section
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.)
Ceased
Application number
EP80104246A
Other languages
German (de)
French (fr)
Inventor
Otto Dr. Ing. Daude
Heinz Peckmann
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.)
Novelis Deutschland GmbH
Original Assignee
Alcan Aluminiumwerke GmbH
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 Alcan Aluminiumwerke GmbH filed Critical Alcan Aluminiumwerke GmbH
Publication of EP0023041A1 publication Critical patent/EP0023041A1/en
Ceased 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
    • 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
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing 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
    • 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
    • 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
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/185—Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
    • 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
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • 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
    • F01N2530/06—Aluminium or alloys thereof

Definitions

  • the invention relates to an outer housing for an exhaust muffler for internal combustion engines, comprising at least one pipe section which has a seamlessly transitioning base at one end and at least one connecting piece which also proceeds seamlessly.
  • the exhaust muffler according to the invention should preferably be used on motor vehicles.
  • the bottom and the connecting piece extending therefrom are formed in one piece on the pipe section in question in that the relevant end of the pipe section is tapered by round hammers.
  • the round hammering can be carried out over a mandrel or also without a mandrel as cold forming or hot forming.
  • This known outer housing has several disadvantages.
  • the shaping of the pipe socket by means of rotary hammers not only requires expensive tools, but is also labor-intensive and complicated.
  • the floor can only be tapered outwards up to about 45 ° so that the creation of other shapes for the floor, e.g. a bottom extending substantially perpendicular to the tube axis, with the known manufacturing method is excluded.
  • the tube section with bottom and connecting piece consists of a wrought aluminum alloy and is extruded in one piece.
  • the solution according to the invention allows the production of the pipe socket with bottom and connecting piece in one operation. This reduces both the manufacturing time and the manufacturing costs compared to the known designs.
  • the extrusion process also allows any design of the bottom and the connecting piece or the connecting piece.
  • the latter can also be arranged anywhere on the floor.
  • the connecting pieces can namely protrude both inwards and outwards and / or be arranged centrally or eccentrically with respect to the pipe axis.
  • the wrought aluminum alloys are highly corrosion-resistant, so that the outer housing according to the invention is characterized by a long service life.
  • the outer housing according to the invention can be made relatively thin-walled.
  • the screw connections for the base and cover, which are otherwise required for multi-part outer housings, are no longer required.
  • the outer housing according to the invention is characterized by a low weight.
  • An exhaust gas silencer for internal combustion engines has become known (DE-OS 26 53 732), in which the tubular housing consists of an extrusion process. manufactured aluminum hollow profile.
  • the two front housing covers are designed as separate components that have to be screwed to the tubular basic housing.
  • the outer housing of the known exhaust silencer then consists of several differently designed components that must be assembled. This makes the known construction more expensive.
  • the pipe sections can have a round, oval or rectangular cross section and cooling fins can be formed in one piece on the outer surface of the pipe sections.
  • the outer housing according to the invention can consist of at least two pipe sections which are aligned with one another. Both end pipe sections can be designed according to the invention. But it is also conceivable that an end or middle tube section is only cylindrical.
  • the outer housing according to the invention consists of at least two pipe sections placed flush against one another, it is advantageous that the pipe sections cannot be removed by folding or welding are interconnected.
  • an intermediate base is crimped in the joining plane of two pipe sections placed one against the other. This does not necessarily have to be made of an aluminum alloy, but can also consist of steel.
  • the outer housing according to the invention consists of only one pipe section, it is expedient that the other end of the pipe section is closed by a cover, which in turn has one or more connecting pieces.
  • the connection between the cover and the pipe socket can be made as desired and e.g. be a screw connection.
  • the wide design options of aluminum extrusion allow the shape of the floor to be chosen as desired. This can be conical, curved or flat.
  • At least one receiving part directed into the interior of the tube is integrally formed exclusively or in addition to at least one connecting piece projecting outwards at the bottom of the tube section.
  • This receiving part is used to fix a perforated tube arranged in the interior of an exhaust silencer, between whose outer wall and the inner wall of the outer housing a noise-absorbing material is sandwiched.
  • the described receiving part is expediently designed as a pipe socket.
  • a plurality of such connecting pieces and pipe pieces can also be provided.
  • the inner pipe socket is designed in such a way that subsequent deformation, e.g. training in the form of a venturi tube is possible.
  • the outer housing for an exhaust gas silencer for internal combustion engines consists of two essentially identical tubular sections, which are denoted overall by 10.
  • Each tube section 10 comprises a cylindrical part 11 which merges seamlessly into a base 12 at one end. From this floor 12 also a connector 13 goes off seamlessly.
  • Each of the pipe sections 10 with bottom 12 and connecting piece 13 consists of a wrought aluminum alloy and is integral in the ' Extrusion process manufactured.
  • the two pipe sections 10 are permanently connected to one another by a fold 14.
  • a tube 21 is inserted into the connecting piece 13, which has passage openings 22 and over which a perforated tube 23 is pushed.
  • a sound-absorbing material 24 is introduced between this perforated tube 23 and the inner wall of the tube sections 10.
  • Fig. 2 shows a slightly modified end of a pipe section 10. Then goes from the bottom 12 of the pipe section 10 not only to the outside of the connecting piece 13, but also inwardly a pipe socket 15, wherein the connecting piece 13 and the pipe socket 15 are aligned. Such a shape can easily be produced in the extrusion process. While an exhaust pipe 25 is pushed onto the connecting piece 13, the pipe piece 15 carries the perforated pipe 23.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

Dieses Außengehäuse besteht aus mindestens einem Rohrabschnitt (10), der an einem Ende einen nahtlos übergehenden Boden (12) und mindestens einen davon ebenfalls nahtlos abgehenden Anschlußstutzen (13) aufweist. Um ein derartiges Außengehäuse einfach und billig aus einem Werkstoff herstellen zu können, der besonders korrosionsbeständig ist, wird das Außengehäuse, bestehend aus Rohrabschnitt (10), Boden (12) und Anschlußstutzen (13) aus einer Aluminiumknetlegierung einstückig fließgepreßt.This outer housing consists of at least one pipe section (10), which has a seamlessly transitioning base (12) at one end and at least one connection piece (13) which also flows out seamlessly. In order to be able to produce such an outer housing simply and inexpensively from a material which is particularly corrosion-resistant, the outer housing, consisting of the tube section (10), base (12) and connecting piece (13), is extruded in one piece from a wrought aluminum alloy.

Description

Die Erfindung betrifft ein Außengehäuse für einen Abgasschalldämpfer für Brennkraftmaschinen, bestehend aus mindestens einem Rohrabschnitt, der an einem Ende einen nahtlos übergehenden Boden und mindestens einen davon ebenfalls nahtlos abgehenden Anschlußstutzen aufweist.The invention relates to an outer housing for an exhaust muffler for internal combustion engines, comprising at least one pipe section which has a seamlessly transitioning base at one end and at least one connecting piece which also proceeds seamlessly.

Der erfindungsgemäße Abgasschalldämpfer soll bevorzugt an Kraftfahrzeugen zur Anwendung gelangen.The exhaust muffler according to the invention should preferably be used on motor vehicles.

Bei einem bekannten Außengehäuse der vorausgesetzten Art (DE-OS 25 20 301) werden der Boden und der davon abgehende Anschlußstutzen an dem fraglichen Rohrabschnitt dadurch einstückig ausgebildet, daß das diesbezügliche Ende des Rohrabschnitts durch Rundhämmern verjüngt wird. Dabei kann das Rundhämmern über einem Dorn oder auch ohne Dorn als Kaltverformung oder Warmverformung vorgenommen werden. Dieses bekannte Außengehäuse weist mehrere Nachteile auf. Die Formgebung des Rohrstutzens durch Rundhämmern erfordert bei exakter Herstellung nicht nur teuere Werkzeuge, sondern ist auch arbeitsintensiv und kompliziert. Der Boden kann nur bis zu etwa 45° konisch nach außen verlaufen, so daß die Erzeugung anderer Formen für den Boden, z.B. eines im wesentlichen senkrecht zur Rohrachse verlaufenden Bodens, mit dem bekannten Herstellungsverfahren ausgeschlossen ist.In a known outer housing of the presupposed type (DE-OS 25 20 301), the bottom and the connecting piece extending therefrom are formed in one piece on the pipe section in question in that the relevant end of the pipe section is tapered by round hammers. The round hammering can be carried out over a mandrel or also without a mandrel as cold forming or hot forming. This known outer housing has several disadvantages. The shaping of the pipe socket by means of rotary hammers not only requires expensive tools, but is also labor-intensive and complicated. The floor can only be tapered outwards up to about 45 ° so that the creation of other shapes for the floor, e.g. a bottom extending substantially perpendicular to the tube axis, with the known manufacturing method is excluded.

Demgegenüber ist es Aufgabe der Erfindung, ein Außengehäuse für einen Abgasschalldämpfer für Brennkraftmaschinen zu schaffen, das einfach und billigIn contrast, it is an object of the invention to provide an outer housing for an exhaust silencer for internal combustion engines that is simple and cheap

herstellbar ist, aus einem Werkstoff hergestellt ist, , der besonders korrosionsbeständig ist, und das gegenüber den bekannten Konstruktionen zudem eine Gewichtseinsparung erbringt.is producible, is made of a material that is particularly corrosion-resistant, and which also saves weight compared to the known constructions.

Diese Aufgabe wird dadurch gelöst, daß der Rohrabschnitt mit Boden und Anschlußstutzen aus einer Aluminiumknetlegierung besteht und einstückig fließgepreßt ist.This object is achieved in that the tube section with bottom and connecting piece consists of a wrought aluminum alloy and is extruded in one piece.

Die erfindungsgemäße Lösung erlaubt die Herstellung des Rohrstutzens mit Boden und Anschlußstutzen in einem Arbeitsgang. Damit reduzieren sich gegenüber den bekannten Konstruktionen sowohl die Herstellungszeit als auch die Herstellungskosten. Das Fließpreßverfahren erlaubt darüber hinaus eine beliebige Gestaltung des Bodens und des Anschlußstutzens bzw. der Anschlußstutzen. Letztere können auch beliebig zum Boden angeordnet sein. Die Anschlußstutzen können nämlich sowohl nach innen als auch nach außen ragen und/oder zentrisch oder exzentrisch in bezug auf die Rohrachse angeordnet sein. Die verwendbaren Aluminiumknetlegierungen sind hochkorrosionsbeständig, so daß sich das erfindungsgemäße Außengehäuse durch eine lange Lebenszeit auszeichnet. Das erfindungsgemäße Außengehäuse kann relativ dünnwandig ausgebildet werden. Die sonst bei mehrteiligen Außengehäusen erforderlichen Schraubverbindungen für Boden und Deckel entfallen. Dadurch zeichnet sich das erfindungsgemäße Außengehäuse durch ein geringes Gewicht aus.The solution according to the invention allows the production of the pipe socket with bottom and connecting piece in one operation. This reduces both the manufacturing time and the manufacturing costs compared to the known designs. The extrusion process also allows any design of the bottom and the connecting piece or the connecting piece. The latter can also be arranged anywhere on the floor. The connecting pieces can namely protrude both inwards and outwards and / or be arranged centrally or eccentrically with respect to the pipe axis. The wrought aluminum alloys are highly corrosion-resistant, so that the outer housing according to the invention is characterized by a long service life. The outer housing according to the invention can be made relatively thin-walled. The screw connections for the base and cover, which are otherwise required for multi-part outer housings, are no longer required. The outer housing according to the invention is characterized by a low weight.

Zwar ist ein Abgasschalldämpfer für,Brennkraftmaschinen bekannt geworden (DE-OS 26 53 732), bei dem das rohrförmige Gehäuse aus einem im Strangpreßverfahren . hergestellten Aluminium-Hohlprofil besteht. Bei diesem bekannten Abgasschalldämpfer sind allerdings die beiden stirnseitigen Gehäusedeckel als separate Bauteile ausgebildet, die mit dem rohrförmigen Grundgehäuse verschraubt werden müssen. Das Außengehäuse des bekannten Abgasschalldämpfers besteht danach aus mehreren unterschiedlich ausgebildeten Bauteilen, die zusammenmontiert werden müssen. Dies verteuert die bekannte Konstruktion.An exhaust gas silencer for internal combustion engines has become known (DE-OS 26 53 732), in which the tubular housing consists of an extrusion process. manufactured aluminum hollow profile. In this known exhaust silencer, however, the two front housing covers are designed as separate components that have to be screwed to the tubular basic housing. The outer housing of the known exhaust silencer then consists of several differently designed components that must be assembled. This makes the known construction more expensive.

Zweckmäßige Weiterbildungen der erfindungsgemäßen Lösung ergeben sich aus den übrigen Ansprüchen.Appropriate developments of the solution according to the invention result from the remaining claims.

Nachdem das Fließpreßverfahren weite Gestaltungsmöglichkeiten zuläßt, können die Rohrabschnitte runden, ovalen oder rechteckigen Querschnitt besitzen und an der Außenfläche der Rohrabschnitte Kühlrippen einstückig ausgebildet sein.Since the extrusion process allows wide design options, the pipe sections can have a round, oval or rectangular cross section and cooling fins can be formed in one piece on the outer surface of the pipe sections.

Das erfindungsgemäße Außengehäuse kann aus mindestens zwei fluchtend aneinandergesetzten Rohrabschnitten bestehen. Dabei können beide endseitigen Rohrabschnitte erfindungsgemäß ausgebildet sein. Es ist aber auch denkbar, daß ein endseitiger oder mittlerer Rohrabschnitt nur zylindrisch ausgebildet ist.The outer housing according to the invention can consist of at least two pipe sections which are aligned with one another. Both end pipe sections can be designed according to the invention. But it is also conceivable that an end or middle tube section is only cylindrical.

In dem Fall, in dem das erfindungsgemäße Außengehäuse aus mindestens zwei fluchtend aneinandergesetzten Rohrabschnitten besteht, ist es von Vorteil, daß die Rohrabschnitte durch Falzen oder Schweißen unlösbar miteinander verbunden sind. Bei einer derartigen Ausführungsform ist es-zweckmäßig, daß in der Fügeebene von zwei aneinandergesetzten Rohrabschnitten ein Zwischenboden eingefalzt ist. Dieser muß nicht notwendigerweise aus einer Aluminiumlegierung, sondern kann auch aus Stahl bestehen.In the case in which the outer housing according to the invention consists of at least two pipe sections placed flush against one another, it is advantageous that the pipe sections cannot be removed by folding or welding are interconnected. In such an embodiment, it is expedient that an intermediate base is crimped in the joining plane of two pipe sections placed one against the other. This does not necessarily have to be made of an aluminum alloy, but can also consist of steel.

Falls das erfindungsgemäße Außengehäuse nur aus einem Rohrabschnitt besteht, ist es zweckmäßig, daß das andere Ende des Rohrabschnitts durch einen Deckel verschlossen ist, der seinerseits einen oder mehrere Anschlußstutzen aufweist. Die Verbindung zwischen Deckel und Rohrstutzen kann beliebig ausgebildet und z.B. eine Schraubverbindung sein.If the outer housing according to the invention consists of only one pipe section, it is expedient that the other end of the pipe section is closed by a cover, which in turn has one or more connecting pieces. The connection between the cover and the pipe socket can be made as desired and e.g. be a screw connection.

Die breite Gestaltungsmöglichkeit des Aluminium-Fließpressens läßt es zu, die Form des Bodens beliebig zu wählen. Dieser kann konisch, gewölbt oder eben sein.The wide design options of aluminum extrusion allow the shape of the floor to be chosen as desired. This can be conical, curved or flat.

Nach einer weiteren, besonders bevorzugten Ausführungsform der erfindungsgemäßen Lösung ist ausschließlich oder neben mindestens-einem nach außen ragenden Anschlußsutzen am Boden des Rohrabschnitts mindestens ein in das Rohrinnere gerichtetes Aufnahmeteil einstückig angeformt. Dieses Aufnahmeteil dient der Fixierung eines im Inneren eines Abgasschalldämpfers angeordneten, perforierten Rohrs, zwischen dessen Außenwand und der Innenwand des Außengehäuses ein geräuschabsorbierendes Material eingeschichtet ist.According to a further, particularly preferred embodiment of the solution according to the invention, at least one receiving part directed into the interior of the tube is integrally formed exclusively or in addition to at least one connecting piece projecting outwards at the bottom of the tube section. This receiving part is used to fix a perforated tube arranged in the interior of an exhaust silencer, between whose outer wall and the inner wall of the outer housing a noise-absorbing material is sandwiched.

Das geschilderte Aufnahmeteil ist zweckmäßigerweise als Rohrstutzen ausgebildet. In diesem Fall ist es herstellungstechnisch von Vorteil, daß der äußere Anschlußstutzen und der innere Rohrstutzen zueinander fluchtend angeordnet sind. Es können auch mehrere derartige Anschlußstutzen und Rohrstutzen vorgesehen sein.The described receiving part is expediently designed as a pipe socket. In this case, it is advantageous from a manufacturing point of view that the outer connection piece and the inner pipe piece are in relation to one another are aligned. A plurality of such connecting pieces and pipe pieces can also be provided.

Es ist schließlich von Vorteil, wenn der innere Rohrstutzen derart ausgebildet ist, daß eine spätere Verformung, z.B. eine Ausbildung in Form eines Venturi-Rohrs, möglich ist.Finally, it is advantageous if the inner pipe socket is designed in such a way that subsequent deformation, e.g. training in the form of a venturi tube is possible.

Ausführungsbeispiele des erfindungsgemäßen Außengehäuses für einen Abgasschalldämpfer für Brennkraftmaschinen werden anhand der Zeichnung näher erläutert. Es zeigt

  • Fig. 1 einen Längsschnitt durch einen Abgasschalldämpfer mit einem erfindungsgemäßen Außengehäuse, wobei sowohl das Außengehäuse selbst als auch die übrigen Bauteile eines Abgasschalldämpfers lediglich schematisch dargestellt sind, und
  • Fig. 2 einen Längsschnitt durch ein Ende eines zweiten Ausführungsbeispiels des erfindungsgemäßen Außengehäuses.
Embodiments of the outer housing according to the invention for an exhaust gas silencer for internal combustion engines are explained in more detail with reference to the drawing. It shows
  • Fig. 1 shows a longitudinal section through an exhaust muffler with an outer housing according to the invention, both the outer housing itself and the other components of an exhaust muffler are shown only schematically, and
  • Fig. 2 shows a longitudinal section through one end of a second embodiment of the outer housing according to the invention.

Nach Fig. 1 besteht das Außengehäuse für einen Abgasschalldämpfer für Brennkraftmaschinen aus zwei im wesentlichen identisch ausgebildeten Rohrabschnitten, die insgesamt mit 10 bezeichnet sind. Jeder Rohrabschnitt 10 umfaßt ein zylindrisches Teil 11, das an einem Ende nahtlos in einen Boden 12 übergeht. Von diesem Boden 12 geht ebenfalls nahtlos ein Anschlußstutzen 13 ab. Jeder der Rohrabschnitte 10 mit Boden 12 und Anschlußstutzen 13 besteht aus einer Aluminiumknetlegierung und ist einstückig im' Fließpreßverfahren hergestellt. Die beiden Rohrab--schnitte 10 sind durch eine Falzung 14 unlösbar miteinander verbunden.According to FIG. 1, the outer housing for an exhaust gas silencer for internal combustion engines consists of two essentially identical tubular sections, which are denoted overall by 10. Each tube section 10 comprises a cylindrical part 11 which merges seamlessly into a base 12 at one end. From this floor 12 also a connector 13 goes off seamlessly. Each of the pipe sections 10 with bottom 12 and connecting piece 13 consists of a wrought aluminum alloy and is integral in the ' Extrusion process manufactured. The two pipe sections 10 are permanently connected to one another by a fold 14.

Die nur schematisch angedeuteten inneren Bauteile des Abgasschalldämpfers nach Fig. 1 sind an sich bekannt und bedürfen deshalb nur einer kurzen Erläuterung. Danach ist in den Falz 14 zwischen den beiden Rohrabschnitten 10 ein Zwischenboden 20 eingefalzt.The only schematically indicated internal components of the exhaust silencer according to FIG. 1 are known per se and therefore require only a brief explanation. An intermediate base 20 is then folded into the fold 14 between the two tube sections 10.

-In den Anschlußstutzen 13 ist ein Rohr 21 eingeschoben, das Durchtrittsöffnungen 22 aufweist und über das ein perforiertes Rohr 23 geschoben ist. Zwischen diesem perforierten Rohr 23 und der Innenwand der Rohrabschnitte 10 ist ein schalldämmendes Material 24 eingebracht.A tube 21 is inserted into the connecting piece 13, which has passage openings 22 and over which a perforated tube 23 is pushed. A sound-absorbing material 24 is introduced between this perforated tube 23 and the inner wall of the tube sections 10.

Fig. 2 zeigt ein etwas modifiziertes Ende eines Rohrabschnitts 10. Danach geht von dem Boden 12 des Rohrabschnitts 10 nicht nur nach außen der Anschlußstutzen 13 ab, sondern zusätzlich nach innen ein Rohrstutzen 15, wobei der Anschlußstutzen 13 und der Rohrstutzen 15 miteinander fluchten. Eine derartige Form läßt sich leicht im Fließpreßverfahren herstellen. Während auf den Anschlußstutzen 13 ein Auspuffrohr 25 aufgeschoben ist, trägt der Rohrstutzen 15 das perforierte Rohr 23.Fig. 2 shows a slightly modified end of a pipe section 10. Then goes from the bottom 12 of the pipe section 10 not only to the outside of the connecting piece 13, but also inwardly a pipe socket 15, wherein the connecting piece 13 and the pipe socket 15 are aligned. Such a shape can easily be produced in the extrusion process. While an exhaust pipe 25 is pushed onto the connecting piece 13, the pipe piece 15 carries the perforated pipe 23.

Claims (11)

1. Außengehäuse für einen Abgasschalldämpfer für Brennkraftmaschinen, bestehend aus mindestens einem Rohrabschnitt, der an einem Ende einen nahtlos übergehenden Boden und mindestens einen davon ebenfalls nahtlos abgehenden Anschlußstutzen aufweist, dadurch gekennzeichnet, daß der Rohrabschnitt (10) mit Boden (12) und Anschlußstutzen (13) aus einer Aluminiumknetlegierung besteht und einstückig fließgepreßt ist.1. Outer housing for an exhaust silencer for internal combustion engines, consisting of at least one pipe section, which has a seamlessly transitioning bottom at one end and at least one connecting piece which also flows out seamlessly, characterized in that the pipe section (10) with bottom (12) and connecting piece ( 13) consists of a wrought aluminum alloy and is extruded in one piece. 2. Außengehäuse nach Anspruch 1, dadurch gekennzeichnet, daß der Rohrabschnitt (10) bzw. die Rohrabschnitte (10) runden, ovalen oder rechteckigen Querschnitt besitzt bzw. besitzen.2. Outer housing according to claim 1, characterized in that the tube section (10) or the tube sections (10) has a round, oval or rectangular cross section. 3. Außengehäuse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß an der Außenfläche des Rohrabschnitts bzw. der Rohrabschnitte Kühlrippen einstückig ausgebildet sind.3. Outer housing according to claim 1 or 2, characterized in that cooling fins are integrally formed on the outer surface of the pipe section or the pipe sections. 4. Außengehäuse nach einem der vorhergehenden Ansprüche, bestehend aus mindestens zwei fluchtend aneinandergesetzten Rohrabschnitten, dadurch gekennzeichnet, daß die Rohrabschnitte (10) durch Falzen (14) oder Schweißen unlösbar miteinander verbunden sind.4. Outer housing according to one of the preceding claims, consisting of at least two aligned pipe sections, characterized in that the pipe sections (10) are inextricably linked by folding (14) or welding. 5. Außengehäuse nach Anspruch 4, dadurch gekennzeichnet, daß in der Fügeebene (14) von zwei aneinandergesetzten Rohrabschnitten (10) ein Zwischenboden (20) eingefalzt ist.5. Outer housing according to claim 4, characterized in that an intermediate base (20) is folded in the joining plane (14) of two tube sections (10) placed against one another. 6. Außengehäuse nach einem der vorhergehenden Ansprüche 1 bis 3, bestehend aus einem Rohrabschnitt, dadurch gekennzeichnet, daß das andere Ende des Rohrabschnitts durch einen Deckel verschlossen ist, der seinerseits einen oder mehrere Anschlußstutzen aufweist.6. Outer housing according to one of the preceding claims 1 to 3, consisting of a pipe section, characterized in that the other end of the pipe section is closed by a cover which in turn has one or more connecting pieces. 7. Außengehäuse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Form des Bodens (12) konisch, gewölbt oder eben ist.7. Outer housing according to one of the preceding claims, characterized in that the shape of the bottom (12) is conical, curved or flat. 8. Außengehäuse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß am Boden (12) mindestens ein in das Rohrinnere gerichtetes Aufnahmeteil (15) einstückig angeformt ist.8. Outer housing according to one of the preceding claims, characterized in that at least one receiving part (15) directed into the tube interior is integrally formed on the bottom (12). 9. Außengehäuse nach Anspruch 8, dadurch gekennzeichnet, daß das Aufnahmeteil als Rohrstutzen (15) ausgebildet ist.9. Outer housing according to claim 8, characterized in that the receiving part is designed as a pipe socket (15). 10. Außengehäuse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der äußere Anschlußstutzen (13) und der innere Rohrstutzen (15) zueinander fluchtend angeordnet sind.10. Outer housing according to one of the preceding claims, characterized in that the outer connecting piece (13) and the inner pipe socket (15) are arranged in alignment with one another. 11. Außengehäuse nach Anspruch 9 oder-10, dadurch gekennzeichnet, daß der innere Rohrstutzen (15) derart ausgebildet ist, daß eine spätere Verformung, z.B. eine Ausbildung in Form eines Venturi-Rohrs, möglich ist.11. Outer housing according to claim 9 or - 10, characterized in that the inner pipe socket (15) is designed such that a later deformation, for example a training in the form of a Venturi tube, is possible.
EP80104246A 1979-07-24 1980-07-18 External housing for an internal combustion engine silencer Ceased EP0023041A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2930046A DE2930046C2 (en) 1979-07-24 1979-07-24 Exhaust silencers for internal combustion engines
DE2930046 1979-07-24

Publications (1)

Publication Number Publication Date
EP0023041A1 true EP0023041A1 (en) 1981-01-28

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ID=6076666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104246A Ceased EP0023041A1 (en) 1979-07-24 1980-07-18 External housing for an internal combustion engine silencer

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US (1) US4356886A (en)
EP (1) EP0023041A1 (en)
JP (1) JPS5634918A (en)
AR (1) AR226434A1 (en)
BR (1) BR8004598A (en)
CA (1) CA1161367A (en)
DE (1) DE2930046C2 (en)
ES (1) ES493623A0 (en)

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EP0571301A2 (en) * 1992-05-18 1993-11-24 Eastman Kodak Company Polymeric particles and a method of preparaing the same
FR2921106A1 (en) * 2007-09-14 2009-03-20 Faurecia Sys Echappement Central exhaust element for internal combustion heat engine of motor vehicle, has rolled tubes respectively integrated to surfaces of plate by integration units, where sections of tubes vary between two parts

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US5248859A (en) * 1991-03-25 1993-09-28 Alexander Borla Collector/muffler/catalytic converter exhaust systems for evacuating internal combustion engine cylinders
JP2003003842A (en) * 2001-06-20 2003-01-08 Nakagawa Sangyo Kk Outer component of exhaust system and production method therefor
JP2005509792A (en) * 2001-11-20 2005-04-14 ノルスク・ヒドロ・アーエスアー Exhaust device and method for manufacturing the same
US7934580B2 (en) * 2006-04-12 2011-05-03 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system
US7942237B2 (en) * 2006-04-12 2011-05-17 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system with integrated reflective chamber
US7730996B2 (en) * 2006-04-12 2010-06-08 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system with integrated crash management
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US20140196977A1 (en) * 2013-01-16 2014-07-17 Henn Gmbh & Co Kg. Silencer and method for manufacturing the same
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CN109386505B (en) * 2017-08-09 2022-02-11 开利公司 Silencer for refrigerating device and refrigerating device

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GB865174A (en) * 1959-09-03 1961-04-12 Leslie James Burton Improvements in silencers for exhaust gases
DE1476638A1 (en) * 1963-09-12 1969-10-09 Walker Mfg Company Silencer for internal combustion engines
CA891310A (en) * 1969-12-01 1972-01-25 E. Rieder Otto Muffler can
DE2520301A1 (en) * 1975-05-07 1976-11-18 Leistritz Maschfabrik Paul Silencer for motor cycle engine - having end tapered by swaging with installations welded into position (NL091176)
US4105090A (en) * 1975-08-09 1978-08-08 Kawasaki Jukogyo Kabushiki Kaisha Muffler for exhaust gases
DE2555095A1 (en) * 1975-12-08 1977-06-30 Metallgesellschaft Ag Malleable aluminium alloys with high recrystallisation temps. - useful for exhaust systems, heat exchangers, solar energy collectors etc.
DE2648416A1 (en) * 1976-10-26 1978-04-27 Volkswagenwerk Ag Noise suppressor esp. for combustion engine exhaust - has casing with sintered insert and parallel flow passages
DE2653732A1 (en) * 1976-11-26 1978-06-01 Kloeckner Humboldt Deutz Ag Silencer for automobile IC engine - has outer case of extruded profiled corrosion resisting aluminium lined with sound insulation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571301A2 (en) * 1992-05-18 1993-11-24 Eastman Kodak Company Polymeric particles and a method of preparaing the same
EP0571301A3 (en) * 1992-05-18 1994-11-17 Eastman Kodak Co Polymeric particles and a method of preparaing the same.
FR2921106A1 (en) * 2007-09-14 2009-03-20 Faurecia Sys Echappement Central exhaust element for internal combustion heat engine of motor vehicle, has rolled tubes respectively integrated to surfaces of plate by integration units, where sections of tubes vary between two parts

Also Published As

Publication number Publication date
CA1161367A (en) 1984-01-31
ES8104494A1 (en) 1981-04-16
ES493623A0 (en) 1981-04-16
BR8004598A (en) 1981-02-03
JPS5634918A (en) 1981-04-07
DE2930046C2 (en) 1982-02-04
AR226434A1 (en) 1982-07-15
US4356886A (en) 1982-11-02
DE2930046A1 (en) 1981-03-12

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