EP0744537A1 - Exhaust pipe for internal combustion engines - Google Patents

Exhaust pipe for internal combustion engines Download PDF

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Publication number
EP0744537A1
EP0744537A1 EP95107779A EP95107779A EP0744537A1 EP 0744537 A1 EP0744537 A1 EP 0744537A1 EP 95107779 A EP95107779 A EP 95107779A EP 95107779 A EP95107779 A EP 95107779A EP 0744537 A1 EP0744537 A1 EP 0744537A1
Authority
EP
European Patent Office
Prior art keywords
pipe
individual
pipes
exhaust pipe
pipe socket
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.)
Granted
Application number
EP95107779A
Other languages
German (de)
French (fr)
Other versions
EP0744537B1 (en
Inventor
Winfried Krebs
Andreas Rohrbach
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.)
Dr Ing HCF Porsche AG
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Dr Ing HCF Porsche AG
Renault SAS
Regie Nationale des Usines Renault
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 Dr Ing HCF Porsche AG, Renault SAS, Regie Nationale des Usines Renault filed Critical Dr Ing HCF Porsche AG
Priority to DE59505089T priority Critical patent/DE59505089D1/en
Priority to EP19950107779 priority patent/EP0744537B1/en
Priority to JP11790096A priority patent/JPH09105327A/en
Priority to KR1019960017147A priority patent/KR100404556B1/en
Publication of EP0744537A1 publication Critical patent/EP0744537A1/en
Application granted granted Critical
Publication of EP0744537B1 publication Critical patent/EP0744537B1/en
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
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds 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
    • 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
    • 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
    • F01N13/141—Double-walled exhaust pipes 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers

Definitions

  • the invention relates to an exhaust pipe according to the preamble of claim 1.
  • a double-walled exhaust pipe which has an insulating material in the annular space between the individual pipes and the encapsulation. Furthermore, an exhaust pipe is known from DE 40 21 563 A1, which has a subdivision. Furthermore, an exhaust pipe is known from US-PS 40 22 019, in which the individual pipes open into a pipe socket, which is designed as a pipe funnel.
  • the object of the invention is to provide an exhaust pipe for an internal combustion engine which can be connected in a simple manner to a catalytic converter and which ensures thermal insulation.
  • the main advantages achieved with the invention are that the individual pipelines branching off the engine - consisting of inner and outer pipes - are combined to form a connection element for connection to an exhaust gas catalytic converter.
  • This is done in a separately manufactured pipe socket, which serves as an adapter for connection to the catalytic converter.
  • This is structurally simple to manufacture and creates a possibility of connecting the four or more individual pipelines with a connecting line of the exhaust gas catalytic converter.
  • the individual pipelines continued in the pipe socket are pressed together with the catalyst up to the fastening flange in such a way that four tubular elements with a triangular cross section are formed which are connected to one another, for example by welding. These are fixed in a hole in the mounting flange by welding.
  • the pipe pieces in the pipe socket are plugged onto or into the individual pipes of the exhaust pipe and have a sliding or loose fit, so that no tension can occur in the high prevailing temperatures in the exhaust pipe.
  • the pipe socket has a housing capsule, in which an air space is formed between the pipe pieces, which is continued in the individual pipes by outer pipes, so that there is a continuous air space and thus a continuous heat insulation from the connection to the engine to the catalytic converter.
  • the housing capsule is connected to the respective individual pipelines, for example, by means of molded rings which are pushed onto the outer pipes of the individual pipelines and which can be welded to the outer pipes and to the housing capsule.
  • the air spaces pass from the individual pipelines into the housing capsule in the area of the molded rings.
  • the pipe socket is deformed by pressing its pipe pieces into a tubular cross section in one or more operations.
  • a connection to the housing capsule is made in the fastening flange by means of a weld, the shaped ring being designed in a Z-shape and establishing a connection to the outer pipe of the individual pipelines and permitting thermal expansion.
  • an exhaust gas line 1 for an internal combustion engine comprises four individual pipelines 2 to 5, which are connected on the engine side via a screw-on flange A and on an exhaust gas catalytic converter (not shown) via an end-side fastening flange 6a.
  • the individual pipelines 2 to 5, coming from the engine, are spatially brought together in front of a pipe socket 6 and connected to the latter.
  • the pipe socket 6 comprises, according to the number of individual pipes 2 to 5, four pipe pieces 7 to 10, which are combined to form a single tubular connecting element R, consisting of four pipe elements 7a to 10a with a triangular cross section, as shown in FIG. 6.
  • the individual pipelines 2 to 5 and the pipe socket 6 each have capsules 11, 12.
  • these consist of outer tubes 13 which surround the inner tubes 14 with an air space 15.
  • the pipe socket 6 has a surrounding housing 12, which encloses all pipe sections 7 to 10 and the compressed pipe elements 7a to 10a with an air space 16.
  • the pipe sections 7 to 10 in the pipe socket 6 are arranged for connection to the exhaust pipe 1 on the inner pipes 14 of the individual pipes 2 to 5 with a sliding or loose fit.
  • the outer tubes 13 are connected to the housing capsule 12 of the pipe socket 6 via Z-shaped shaped rings 20, the legs of which are welded to the housing capsule 12 and to the outer tube 11.
  • the air spaces 15 between the inner and outer tubes 14 and 13 and the air space 16 between the tubes 7 to 10 and the housing capsule 12 have a continuous connection 21 in the area of the plane X-X of the molded rings 20.
  • the pipe sections 7a to 10a having the triangular cross sections are fastened in the fastening flange 6a in a bore which represents the mouth opening 22, for example by welding.

Landscapes

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

Abstract

The individual branch pipes of the exhaust system are connected to the catalyser through a connecting sleeve (6) by means of a fixing flange (6a). The connecting sleeve encompasses individual pipe pieces which are connected to a connecting element for the catalyser. The connecting element is annular in cross-section and is sub-divided to correspond to the number of the individual branch pipes. The exhaust pipe is encompassed by a through-air chamber (15,16) formed by outer pipes (13) enclosing the inner pipes (14) of the individual branch pipes and also by the casing enclosure (12) covering the connecting sleeve.

Description

Die Erfindung bezieht sich auf eine Abgasleitung nach dem Oberbegriff des Anspruchs 1.The invention relates to an exhaust pipe according to the preamble of claim 1.

Aus der DE 41 42 360 A1 ist eine doppelwandige Abgasleitung bekannt, die im Ringraum zwischen den Einzelrohrleitungen und der Kapselung einen Isolierstoff aufweist. Des weiteren ist aus der DE 40 21 563 A1 eine Abgasleitung bekannt, die eine Unterteilung besitzt. Ferner ist aus der US-PS 40 22 019 eine Abgasleitung bekannt, bei der die Einzelrohrleitungen in einem Rohrstutzen einmünden, der als Rohrtrichter ausgeführt ist.From DE 41 42 360 A1 a double-walled exhaust pipe is known, which has an insulating material in the annular space between the individual pipes and the encapsulation. Furthermore, an exhaust pipe is known from DE 40 21 563 A1, which has a subdivision. Furthermore, an exhaust pipe is known from US-PS 40 22 019, in which the individual pipes open into a pipe socket, which is designed as a pipe funnel.

Aufgabe der Erfindung ist es, eine Abgasleitung für eine Brennkraftmaschine zu schaffen, die in einfacher Weise mit einem Katalysator verbindbar ist und eine Wärmeisolierung gewährleistet.The object of the invention is to provide an exhaust pipe for an internal combustion engine which can be connected in a simple manner to a catalytic converter and which ensures thermal insulation.

Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere vorteilhatte Merkmale beinhalten die Unteransprüche.The object is achieved by the characterizing features of claim 1. Further advantageous features include the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile bestehen darin, daß die vom Motor abzweigenden Einzelrohrleitungen - bestehend aus Innen- und Aussenrohren - zur Verbindung mit einem Abgaskatalysator zu einem Anschlusselement zusammengefaßt sind. Dies erfolgt in einem separat herstellbaren Rohrstutzen, der als Adapter für den Anschluß an den Katalysator dient. Dieser ist baulich einfach herstellbar und schafft eine Anschlußmöglichkeit der vier oder auch mehr Einzelrohrleitungen mit einer Anschlußleitung des Abgaskatalysators. Hierzu sind die im Rohrstutzen fortgeführten Einzelrohrleitungen bis zum Befestigungsflansch mit dem Katalysator derart zusammengedrückt, daß sich vier im Querschnitt dreieckförmige Rohrelemente bilden, die miteinander verbunden sind, beispielsweise durch eine Schweißung. Diese sind in einer Bohrung des Befestigungsflansches durch Schweißen befestigt.The main advantages achieved with the invention are that the individual pipelines branching off the engine - consisting of inner and outer pipes - are combined to form a connection element for connection to an exhaust gas catalytic converter. This is done in a separately manufactured pipe socket, which serves as an adapter for connection to the catalytic converter. This is structurally simple to manufacture and creates a possibility of connecting the four or more individual pipelines with a connecting line of the exhaust gas catalytic converter. For this purpose, the individual pipelines continued in the pipe socket are pressed together with the catalyst up to the fastening flange in such a way that four tubular elements with a triangular cross section are formed which are connected to one another, for example by welding. These are fixed in a hole in the mounting flange by welding.

Die Rohrstücke im Rohrstutzen sind auf oder in die Einzelrohre der Abgasleitung gesteckt und weisen einen Schiebe- oder Lossitz auf, wodurch bei den hohen herrschenden Temperaturen in der Abgasleitung keine Verspannungen auftreten können.The pipe pieces in the pipe socket are plugged onto or into the individual pipes of the exhaust pipe and have a sliding or loose fit, so that no tension can occur in the high prevailing temperatures in the exhaust pipe.

Der Rohrstutzen weist eine Gehäusekapsel auf, bei der zwischen den Rohrstücken ein Luftraum gebildet wird, der bei den Einzelrohren durch Außenrohre fortgeführt wird, so daß sich vom Anschluss am Motor bis unmittelbar zum Katalysator ein durchgehender Luftraum und somit eine durchgehende Wärmeisolierung ergibt.The pipe socket has a housing capsule, in which an air space is formed between the pipe pieces, which is continued in the individual pipes by outer pipes, so that there is a continuous air space and thus a continuous heat insulation from the connection to the engine to the catalytic converter.

Eine Verbindung der Gehäusekapsel mit den jeweiligen Einzelrohrleitungen erfolgt etwa über auf die Aussenrohre der Einzelrohrleitungen geschobene Formringe, welche mit den Außenrohren sowie mit der Gehäusekapsel verschweißbar sind.The housing capsule is connected to the respective individual pipelines, for example, by means of molded rings which are pushed onto the outer pipes of the individual pipelines and which can be welded to the outer pipes and to the housing capsule.

Ein Übertritt der Lufträume von den Einzelrohrleitungen in die Gehäusekapsel erfolgt im Bereich der Formringe.The air spaces pass from the individual pipelines into the housing capsule in the area of the molded rings.

Der Rohrstutzen wird durch ein Verpressen seiner Rohrstücke zu einem rohrkreisförmigen Querschnitt in einem oder mehreren Arbeitsgängen verformt. Eine Verbindung mit der Gehäusekapsel erfolgt im Befestigungsflansch durch eine Schweißung, wobei der Formring Z-förmig ausgeführt ist und eine Verbindung zum Außenrohr der Einzelrohrleitungen herstellt und eine Wärmeausdehnung zulässt.The pipe socket is deformed by pressing its pipe pieces into a tubular cross section in one or more operations. A connection to the housing capsule is made in the fastening flange by means of a weld, the shaped ring being designed in a Z-shape and establishing a connection to the outer pipe of the individual pipelines and permitting thermal expansion.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.

Es zeigen:

Fig. 1
eine schaubildliche Darstellung einer gesamten Abgasleitung mit Einzelrohrleitungen und Rohrstutzen,
Fig. 2
eine Ansicht auf die aus einem Innen- und Außenrohr bestehenden Einzelrohrleitungen mit Anschlußflansch an den Motor,
Fig. 3
eine Seitenansicht des Rohrstutzens,
Fig. 4
einen Schnitt nach der Linie IV-IV der Fig. 3 durch den Rohrstutzen,
Fig. 5
eine Schnittdarstellung einer Gehäusekapsel,
Fig. 6
eine Seitenansicht der Rohrstücke sowie der zu einem Anschlusselement zusammengedrückten Rohre im Rohrstutzen und
Fig. 7
einen Schnitt nach der Linie VII-VII der Fig. 6 durch den Rohrstutzen mit Rohrstücken, zusammengedrückten Rohren und Gehäusekapsel.
Show it:
Fig. 1
a graphical representation of an entire exhaust pipe with individual pipes and pipe sockets,
Fig. 2
a view of the individual pipes consisting of an inner and outer pipe with a connecting flange to the engine,
Fig. 3
a side view of the pipe socket,
Fig. 4
3 shows a section along line IV-IV of FIG. 3 through the pipe socket,
Fig. 5
2 shows a sectional illustration of a housing capsule,
Fig. 6
a side view of the pipe sections and the compressed pipes into a connecting element in the pipe socket and
Fig. 7
a section along the line VII-VII of Fig. 6 through the pipe socket with pipe pieces, compressed pipes and housing capsule.

Eine Abgasleitung 1 für eine Brennkraftmaschine umfaßt bei einer vierzylindrigen Brennkraftmaschine vier Einzelrohrleitungen 2 bis 5, die motorseitig über einen Anschraubflansch A und an einem Abgaskatalysator (nicht dargstellt) über einen endseitigen Befestigungsflansch 6a verbunden sind.In a four-cylinder internal combustion engine, an exhaust gas line 1 for an internal combustion engine comprises four individual pipelines 2 to 5, which are connected on the engine side via a screw-on flange A and on an exhaust gas catalytic converter (not shown) via an end-side fastening flange 6a.

Die Einzelrohrleitungen 2 bis 5 sind vom Motor kommend räumlich vor einem Rohrstutzen 6 zusammengeführt und mit diesem verbunden. Der Rohrstutzen 6 umfaßt entsprechend der Anzahl der Einzelrohrleitungen 2 bis 5 vier Rohrstücke 7 bis 10, die zu einem einzigen rohrförmigen Anschlusselement R, bestehend aus vier mit dreieckförmigem Querschnitt bestehenden Rohrelementen 7a bis 10a, zusammengefaßt sind, wie Fig. 6 näher zeigt.The individual pipelines 2 to 5, coming from the engine, are spatially brought together in front of a pipe socket 6 and connected to the latter. The pipe socket 6 comprises, according to the number of individual pipes 2 to 5, four pipe pieces 7 to 10, which are combined to form a single tubular connecting element R, consisting of four pipe elements 7a to 10a with a triangular cross section, as shown in FIG. 6.

Die Einzelrohrleitungen 2 bis 5 sowie der Rohrstutzen 6 weisen jeweils Kapseln 11, 12 auf. Diese bestehen bei den Einzelrohrleitungen 2 bis 5 aus Außenrohren 13, welche die Innenrohre 14 mit einem Luftraum 15 umgeben. Der Rohrstutzen 6 weist als Kapsel ein umgebendes Gehäuse 12 auf, das alle Rohrstücke 7 bis 10 sowie die zusammengedrückten Rohrelemente 7a bis 10a mit einem Luftraum 16 umschließt.The individual pipelines 2 to 5 and the pipe socket 6 each have capsules 11, 12. In the case of the individual pipelines 2 to 5, these consist of outer tubes 13 which surround the inner tubes 14 with an air space 15. As a capsule, the pipe socket 6 has a surrounding housing 12, which encloses all pipe sections 7 to 10 and the compressed pipe elements 7a to 10a with an air space 16.

Die Rohrstücke 7 bis 10 im Rohrstutzen 6 sind zum Verbinden mit der Abgasleitung 1 auf die Innenrohre 14 der Einzelrohrleitungen 2 bis 5 mit einem Schiebe- oder Lossitz angeordnet.The pipe sections 7 to 10 in the pipe socket 6 are arranged for connection to the exhaust pipe 1 on the inner pipes 14 of the individual pipes 2 to 5 with a sliding or loose fit.

Eine Verbindung der Außenrohre 13 mit der Gehäusekapsel 12 des Rohrstutzens 6 erfolgt über Z-förmige Formringe 20, deren Schenkel mit der Gehäusekapsel 12 sowie mit dem Aussenrohr 11 verschweißt sind.The outer tubes 13 are connected to the housing capsule 12 of the pipe socket 6 via Z-shaped shaped rings 20, the legs of which are welded to the housing capsule 12 and to the outer tube 11.

Die Lufträume 15 zwischen den Innen- und Außenrohren 14 und 13 sowie der Luftraum 16 zwischen den Rohren 7 bis 10 und der Gehäusekapsel 12 weisen im Bereich der Ebene X-X der Formringe 20 eine durchgehende Verbindung 21 auf.The air spaces 15 between the inner and outer tubes 14 and 13 and the air space 16 between the tubes 7 to 10 and the housing capsule 12 have a continuous connection 21 in the area of the plane X-X of the molded rings 20.

Die die dreieckförmigen Querschnitte aufweisenden Rohrstücke 7a bis 10a sind im Befestigungsflansch 6a in einer Bohrung, welche die Mündungsöffnung 22 darstellt, beispielsweise durch eine Schweißung befestigt.The pipe sections 7a to 10a having the triangular cross sections are fastened in the fastening flange 6a in a bore which represents the mouth opening 22, for example by welding.

Claims (5)

Abgasleitung für eine Brennkraftmaschine eines Kraftfahrzeuges mit von den Zylindern des Motors abzweigenden Einzelrohrleitungen, die zu einer einzigen Hauptrohrleitung zusammengeführt sind und welche mit einem Abgaskatalysator verbunden ist, dadurch gekennzeichnet, daß die Einzelrohrleitungen (2 bis 5) der Abgasleitung (1) mit dem Katalysator über einen Rohrstutzen (6) mittels eines Befestigungsflansches (6a) verbunden sind und der Rohrstutzen (6) einzelne Rohrstücke (7 bis 10) umfasst , die mit einem entsprechend der Anzahl der Einzelrohrleitungen (2 bis 5) unterteilten und im Querschnitt kreisförmigen Anschlusselement (R) für den Katalysator verbunden sind und daß die Abgas leitung (1) von durch Aussenrohre (13) umgebende Innenrohre (14) der Einzelrohrleitungen (2 bis 5 ) sowie durch die den Rohrstutzen (6) ummantelnde Gehäusekapsel (12) von einem durchgehenden Luftraum (15, 16) umgeben ist.Exhaust pipe for an internal combustion engine of a motor vehicle with individual pipelines branching off from the cylinders of the engine, which are brought together to form a single main pipeline and which is connected to an exhaust gas catalytic converter, characterized in that the individual pipelines (2 to 5) of the exhaust pipe (1) carry the catalytic converter a pipe socket (6) is connected by means of a fastening flange (6a) and the pipe socket (6) comprises individual pipe pieces (7 to 10) which are divided with a connecting element (R) which is divided according to the number of individual pipes (2 to 5) and is circular in cross section are connected for the catalytic converter and that the exhaust pipe (1) from the inner pipes (14) of the individual pipes (2 to 5) surrounding the outer pipes (13) and the housing capsule (12) encasing the pipe socket (6) from a continuous air space (15 , 16) is surrounded. Abgasleitung nach Anspruch 1, dadurch gekennzeichnet, daß der Rohrstutzen (6) mit den Innenrohren (14) der Einzelrohrleitungen (2 bis 5) verbindbare Rohrstücke (7 bis 10) umfaßt, die im Anschlusselement (R) zu im Querschnitt dreieckförmigen Rohrelementen (7a bis 10a) zusammengefaßt sind und das Anschlusselement (R) im Bereich des Befestigungsflansches (6a) eine kreisförmige Mündungsöffnung (22) aufweist.Exhaust pipe according to claim 1, characterized in that the pipe socket (6) comprises pipe pieces (7 to 10) which can be connected to the inner pipes (14) of the individual pipes (2 to 5) and which in the connection element (R) form pipe elements (7a to 10a) are combined and the connecting element (R) has a circular opening (22) in the area of the fastening flange (6a). Abgasleitung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Rohrelemente (7a bis 10a) des Rohrstutzens (6) in die Innenrohre (14) der Einzelrohrleitungen (2 bis 5) mit einem Lossitz eingesetzt sind und eine Verbindung der Außenrohre (13) der Einzelrohrleitungen (2 bis 5) mit der Gehäusekapsel (12) des Rohrstutzens (6) mittels Formringe (20) erfolgt.Exhaust pipe according to claims 1 or 2, characterized in that the pipe elements (7a to 10a) of the pipe socket (6) are inserted into the inner pipes (14) of the individual pipes (2 to 5) with a loose fit and a connection of the outer pipes (13) the individual pipelines (2 to 5) with the housing capsule (12) of the pipe socket (6) by means of shaped rings (20). Abgasleitung nach Anspruch 1 oder einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rohrstücke (7 bis 10) im Rohrstutzen (6) zur Bildung der dreieckförmigen Rohrelemente (7a bia 10a) zusammengedrückt verbunden und in einer als Mündungsöffnung (22) ausgebildeten Bohrung des Befestigungsflansches (6a) gehalten sind.Exhaust pipe according to Claim 1 or one of the preceding claims, characterized in that the pipe pieces (7 to 10) in the pipe socket (6) are pressed together to form the triangular pipe elements (7a bia 10a) and in a bore in the fastening flange which is designed as an opening (22) (6a) are kept. Abgasleitung nach Anspruch 1 oder einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Übergang der beiden Lufträume (15 und 16) zwischen den einzelnen Kapselungen der Einzelrohrleitungen (2 bis 5) und der Gehäusekapsel (12) des Rohrstutzens (6) etwa in der Befestigungsebene (X-X) des Formringes (20) erfolgt.Exhaust pipe according to claim 1 or one of the preceding claims, characterized in that a transition of the two air spaces (15 and 16) between the individual encapsulations of the individual pipelines (2 to 5) and the housing capsule (12) of the pipe socket (6) approximately in the fastening plane (XX) of the shaped ring (20).
EP19950107779 1995-05-22 1995-05-22 Exhaust pipe for internal combustion engines Expired - Lifetime EP0744537B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59505089T DE59505089D1 (en) 1995-05-22 1995-05-22 Exhaust pipe for an internal combustion engine
EP19950107779 EP0744537B1 (en) 1995-05-22 1995-05-22 Exhaust pipe for internal combustion engines
JP11790096A JPH09105327A (en) 1995-05-22 1996-05-13 Exhaust gas conduit for internal combusion engine
KR1019960017147A KR100404556B1 (en) 1995-05-22 1996-05-21 Exhaust pipe of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19950107779 EP0744537B1 (en) 1995-05-22 1995-05-22 Exhaust pipe for internal combustion engines

Publications (2)

Publication Number Publication Date
EP0744537A1 true EP0744537A1 (en) 1996-11-27
EP0744537B1 EP0744537B1 (en) 1999-02-10

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Family Applications (1)

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EP19950107779 Expired - Lifetime EP0744537B1 (en) 1995-05-22 1995-05-22 Exhaust pipe for internal combustion engines

Country Status (4)

Country Link
EP (1) EP0744537B1 (en)
JP (1) JPH09105327A (en)
KR (1) KR100404556B1 (en)
DE (1) DE59505089D1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309491A (en) * 1996-01-25 1997-07-30 Aisin Takaoka Ltd Exhaust manifold with double-walled insulated pipes
DE19722725A1 (en) * 1997-05-30 1998-12-03 Zeuna Staerker Kg Pipe merging
EP1367234A1 (en) * 2002-05-28 2003-12-03 Benteler Automobiltechnik GmbH Double wall exhaust pipe with flange
EP1726798A3 (en) * 2005-05-25 2007-04-25 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
EP1749987A3 (en) * 2005-08-05 2007-05-02 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
KR100994300B1 (en) 2002-08-06 2010-11-12 파워 시스템즈 엠에프지., 엘엘씨 A transition duct for a gas turbine engine forming a thermally free aft frame
WO2011144206A1 (en) * 2010-05-21 2011-11-24 Benteler Automobiltechnik Gmbh Exhaust gas turbocharger
WO2014060834A3 (en) * 2012-10-15 2014-11-20 Toyota Jidosha Kabushiki Kaisha Exhaust manifold mounting structure for internal combustion engine
EP2921669A1 (en) * 2014-03-20 2015-09-23 Benteler Automobiltechnik GmbH Exhaust manifold for an exhaust system of a combustion engine

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JP2002081315A (en) * 2000-09-06 2002-03-22 Yumex Corp Coupling structure for double-layered tube
DE10144795A1 (en) * 2001-09-12 2003-04-03 Daimler Chrysler Ag Exhaust gas manifold has exit flange side ends of individual tubes against inner wall of exit flange
CN101956597A (en) * 2010-11-12 2011-01-26 重庆潍柴发动机厂 Two-in-one exhaust pipe behind worm wheel of V-type diesel engine
JP2014066166A (en) 2012-09-25 2014-04-17 Toyota Motor Corp Exhaust pipe

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JPS62197620A (en) * 1986-02-25 1987-09-01 Honda Motor Co Ltd Exhaust pipe structure for motorcycle
EP0284466A1 (en) * 1987-03-09 1988-09-28 Automobiles Peugeot Exhaust pipes connecting device and internal combustion engine equipped with this device
FR2644207A1 (en) * 1989-03-07 1990-09-14 Renault Exhaust manifold for an internal combustion engine
DE4021563A1 (en) 1990-07-06 1992-01-09 Opel Adam Ag Exhaust outlet for four cylinder IC engine - replaces Y-pipe with pipe having two parallel longitudinal chambers
DE4142360A1 (en) 1991-12-20 1993-06-24 Bayerische Motoren Werke Ag Double wall exhaust pipe for vehicle engine - has sealed cavity filled with insulating and cooling material

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309491A (en) * 1996-01-25 1997-07-30 Aisin Takaoka Ltd Exhaust manifold with double-walled insulated pipes
US5761905A (en) * 1996-01-25 1998-06-09 Aisin Takaoka Co., Ltd. Exhaust manifold
GB2309491B (en) * 1996-01-25 1999-10-13 Aisin Takaoka Ltd Exhaust manifold
DE19722725A1 (en) * 1997-05-30 1998-12-03 Zeuna Staerker Kg Pipe merging
WO1998054446A1 (en) 1997-05-30 1998-12-03 Zeuna-Stärker GmbH & Co. KG Device for joining tubes
EP1367234A1 (en) * 2002-05-28 2003-12-03 Benteler Automobiltechnik GmbH Double wall exhaust pipe with flange
KR100994300B1 (en) 2002-08-06 2010-11-12 파워 시스템즈 엠에프지., 엘엘씨 A transition duct for a gas turbine engine forming a thermally free aft frame
US7418818B2 (en) 2005-05-25 2008-09-02 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
EP1726798A3 (en) * 2005-05-25 2007-04-25 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
EP1749987A3 (en) * 2005-08-05 2007-05-02 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
US7454901B2 (en) 2005-08-05 2008-11-25 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
US9376936B2 (en) 2010-05-21 2016-06-28 Benteler Automobiltechnik Gmbh Exhaust gas turbocharger housing
WO2011144206A1 (en) * 2010-05-21 2011-11-24 Benteler Automobiltechnik Gmbh Exhaust gas turbocharger
WO2014060834A3 (en) * 2012-10-15 2014-11-20 Toyota Jidosha Kabushiki Kaisha Exhaust manifold mounting structure for internal combustion engine
CN104685179A (en) * 2012-10-15 2015-06-03 丰田自动车株式会社 Exhaust manifold mounting structure for internal combustion engine
US9347361B2 (en) 2012-10-15 2016-05-24 Toyota Jidosha Kabushiki Kaisha Exhaust manifold mounting structure for internal combustion engine
CN104685179B (en) * 2012-10-15 2018-01-16 丰田自动车株式会社 Exhaust manifold installation structure for explosive motor
EP2921669A1 (en) * 2014-03-20 2015-09-23 Benteler Automobiltechnik GmbH Exhaust manifold for an exhaust system of a combustion engine
US9518501B2 (en) 2014-03-20 2016-12-13 Benteler Automobiltechnik Gmbh Exhaust manifold for exhaust system of a combustion engine
EP2921669B1 (en) 2014-03-20 2016-12-21 Benteler Automobiltechnik GmbH Exhaust manifold for an exhaust system of a combustion engine

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JPH09105327A (en) 1997-04-22
DE59505089D1 (en) 1999-03-25
KR100404556B1 (en) 2004-03-18
EP0744537B1 (en) 1999-02-10

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