EP0715064B1 - Exhaust system - Google Patents

Exhaust system Download PDF

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Publication number
EP0715064B1
EP0715064B1 EP95118038A EP95118038A EP0715064B1 EP 0715064 B1 EP0715064 B1 EP 0715064B1 EP 95118038 A EP95118038 A EP 95118038A EP 95118038 A EP95118038 A EP 95118038A EP 0715064 B1 EP0715064 B1 EP 0715064B1
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EP
European Patent Office
Prior art keywords
connection
exhaust system
lambda probe
opening
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95118038A
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German (de)
French (fr)
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EP0715064A1 (en
Inventor
Klaus Krüger
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Erhardt Bischoff & Co KG GmbH
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Erhardt Bischoff & Co KG GmbH
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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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor

Definitions

  • the invention is based on an exhaust system according to the preamble of claim 1.
  • Such an exhaust system is from document US-A-4 833 882 known.
  • Exhaust manifolds for four-cylinder engines are improving the torque curve often combines two cylinder tubes, so that at the end of the exhaust manifold two manifolds available. These two manifolds are by means of of a double-flow down pipe to the catalyst housing.
  • a lambda probe must be placed in front of the catalytic converter which, for example, either directly before the merge the catalytic converter housing or at the outlet of the exhaust manifold is arranged. If the exhaust manifold in two manifolds opens, a connection must be made for the lambda sensor two manifolds are created to ensure an even To ensure flow to the lambda sensor without the double flow of the front pipe is impaired.
  • a flange connection is already known for attaching the cylinder pipes of an exhaust manifold to the cylinder head itself (DE-OS 43 13 091), in which the flange is formed in two parts from a sealing plate and a hood, which is welded to the sealing plate on all sides, but has a cavity forms with the sealing plate. Secondary air can be blown into the cavity or an exhaust gas recirculation line can be connected.
  • the invention has for its object a simple, inexpensive to be produced and yet the uniform flow flange connection for an exhaust system create.
  • the invention proposes an exhaust system with the features of claim 1. Further training of the Invention are the subject of the dependent claims.
  • the production of the upper part as a deep-drawn sheet metal part has not only the advantage of simple production, but the further Advantage that the temperatures transmitted by the manifolds and the resulting thermal expansion over the soft drawn part can be dismantled. Because when merging there is an air gap in the upper part with the sealing plate there is an insulating effect at which the thermal bridge is far less than with a solid flange. This leads to a thermal relief of the flange connection between the exhaust manifold and the Forward tube.
  • a nozzle can be used in an opening of the upper part can be used and attached there.
  • the neck can manufactured as a turned part or as an extruded part and with be provided with a thread so that the commercially available lambda probes can be used without any change.
  • the Neck can be inserted into the opening of the upper part and with an all-round weld seam connected to the upper part become.
  • the upper part in the connection opening for the area surrounding the lambda sensor has a distance from the sealing plate. Thus a more even flow to the lambda probe can be achieved.
  • the top can flange an opening for the manifold surrounding, facing away from the sealing plate Show necking. This can be done with this collar Fasten the collecting tube, especially with a rotating one Weld on the weld.
  • the manifold only on the upper part with an axial distance from its front edge is attached by the sealing plate. Because of the axial The gas flowing through can be at a distance from the front edge laterally radially through the connection provided to the lambda probe reach. It is therefore not necessary to have a manifold to use with a side opening.
  • the tunnel-like expression can be in the manufacture of the Upper part as deep drawn part without additional work step very easy to manufacture.
  • the flange can have two openings for attachment have two manifolds, in which case the connection connected to both openings for the lambda probe is.
  • the lambda sensor can then determine the exhaust gas behavior of both Collector pipes leading cylinders of the internal combustion engine consider.
  • connection for the lambda sensor symmetrical to the two openings for the Collected pipes is arranged and designed. This will make it ensured that both manifolds evenly from the lambda probe be checked so that a real averaging of the exhaust gas behavior is carried out.
  • the invention also proposes in further training that the Connections between the openings for the manifolds and the lambda probe have the same flow resistance can.
  • the top can be used with the Sealing plate to be welded, in particular by means of a circumferential weld.
  • the top can be at least partially flat rest on the sealing plate, especially in their Edge area.
  • Fig. 1 shows a simplified view of a part the flange connection, namely on the sealing plate applied top 1.
  • the top 1 contains, just like the underlying sealing plate 2, two of the same size side by side Openings 3 with a circular shape. Each opening 3 is intended for the attachment of a collecting tube that is connected to a double-flow front pipe is to be connected.
  • the upper part contains a third opening 4, which also Has a circular shape, but a different one in the example shown Size. This opening forms a connection 5 for a lambda sensor.
  • the opening 4 is symmetrical to the two openings 3 for the manifolds arranged, that is, the center of connection 5 for the lambda probe on the perpendicular lies between the two openings for the header pipes.
  • connection 6 From each opening 3 for a collecting pipe leads laterally tunnel-like connection 6 approximately radially to the opening 4 for the lambda sensor. These connections 6 are considered out of the area protrusions of the upper part are formed. Both Connections 6 have the same length and the same cross-sectional shape, so that they also have the same flow resistance for a flowing gas to have.
  • Fig. 2 is a cross section along line II-II in Fig. 1 represents.
  • the cross section is laid so that it passes through the centers of the opening 3 and the opening 4 leads and thus also through the longitudinal median plane of one connection 6.
  • FIG. 2 shows the upper part 1 in the same state as FIG. 1, that is, in the correct position on the sealing plate 2 put on, if necessary already attached.
  • the sealing plate 2 contains two openings 3 corresponding Openings 7, which are aligned with the openings 3.
  • the openings 3 of the upper part 1 are formed by neckings 8, that protrude from the sealing plate 2.
  • the necklines 8 form short cylindrical lugs into which the collecting tube 9 can be inserted a short distance.
  • the connection of the manifold 9 with the neck 8 happens through a circumferential weld.
  • the manifold 9 is only so far inserted into the neck 8 that the front edge 10 of the Collecting tube a distance from the top of the sealing plate 2 maintains.
  • the tunnel-like connection 6, which is characterized by an expression of the Upper part 1 is formed, opens laterally in the neck 8. Due to the axial distance of the front edge 10 of the header 9 can from the manifold 9 in the neck 8th Gas arriving laterally through connection 6 to the right area around the connection opening 4 shown in FIG.
  • the upper part 1 has in the area surrounding the opening 4 likewise, similar to the area of connection 6, one Distance from the sealing plate.
  • the cross section of the transition 11 is approximately quarter-arch. in this area opens the connection 6.
  • a nozzle 12 is inserted, which in Fig. 2 is shown slightly above the opening 4.
  • Socket 12 can be a turned part or an extruded part act.
  • This nozzle 12 does not contain on his illustrated, facing away from the upper part 1, a thread, so that a commercially available lambda probe is screwed in can be.
  • the connection of the connector 12 to the upper part also happens so that the front edge 13 a distance from the sealing plate 2. Again, a weld can be made along the circumference of the connector 12 for their connection serve with the top 1.
  • a flange that has a Connected fore-pipe can be.
  • this further component can be, for example, stud bolts or screw bolts 14 serve for the holes 15 schematically indicated in Fig. 1 are. These holes can both in the sealing plate 2 as also be present in the upper part 1. But it is also possible that the holes 15 only exist in the sealing plate are so that the upper part 1 in the area of these holes 15 for Housing the heads of bolt bulges 16 which is shown in the perspective view in Fig. 3 are.
  • Fig. 3 shows a perspective view a flange provided with two manifolds 9.
  • One can 3 also shows that the header pipes and the connecting piece 12 also arranged obliquely with respect to the plane of the flange could be.
  • the connection 6 is also clear here between the connection for the lambda sensor and the manifold 9 seen through a tunnel-like design of the upper part 1 of the flange is formed.
  • the resulting one located at the end of an exhaust manifold
  • the flange can then be connected to the forward tube be used, for example by screwing the stud bolt 14. Wedging would also be possible.

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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)
  • Gasket Seals (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

The flange connection is used between at least one engine exhaust pipe (9) and a further component and has a sealing plate (2) with an opening (7) for the exhaust pipe and an overlying sheet metal part (1). The latter is provided with a corresponding opening (3) having a deep drawn peripheral lip (8), which fits into the end of the exhaust pipe. A connection (5) for a lambda probe is coupled to at least one of the openings in the sealing plate or the sheet metal part. Pref. sheet the metal part and the sealing plate are spaced from one another at the connection for the lambda probe.

Description

Die Erfindung geht aus von einem Auspuffsystem gemäß dem Oberbegriff des Anspruchs 1. Ein derartiges Auspuffsystem ist aus dem Dokument US-A-4 833 882 bekannt.The invention is based on an exhaust system according to the preamble of claim 1. Such an exhaust system is from document US-A-4 833 882 known.

Bei Abgaskrümmern für Vierzylindermotore werden zur Verbesserung des Drehmomentverlaufs häufig zwei Zylinderrohre zusammengefaßt, so daß am Ende des Auspuffkrümmers zwei Sammelrohre vorhanden sind. Diese beiden Sammelrohre werden mittels eines zweiflutigen Vorrohrs bis zum Katalysatorgehäuse weitergeführt.Exhaust manifolds for four-cylinder engines are improving the torque curve often combines two cylinder tubes, so that at the end of the exhaust manifold two manifolds available. These two manifolds are by means of of a double-flow down pipe to the catalyst housing.

Vor dem Katalysator muß eine Lambdasonde angeordnet werden, die beispielsweise entweder an der Zusammenführung direkt vor dem Katalysatorgehäuse oder aber am Ausgang des Auspuffkrümmers angeordnet wird. Wenn der Auspuffkrümmer in zwei Sammelrohren mündet, muß für die Lambdasonde eine Verbindung von beiden Sammelrohren her geschaffen werden, um eine gleichmäßige Anströmung der Lambdasonde zu gewährleisten, ohne daß die Zweiflutigkeit des Vorrohrs beeinträchtigt wird.A lambda probe must be placed in front of the catalytic converter which, for example, either directly before the merge the catalytic converter housing or at the outlet of the exhaust manifold is arranged. If the exhaust manifold in two manifolds opens, a connection must be made for the lambda sensor two manifolds are created to ensure an even To ensure flow to the lambda sensor without the double flow of the front pipe is impaired.

Bei den im Stand der Technik bekannten Gußkrümmern wird dies auf folgende Weise gelöst. Am Sammelflansch wird ein Butzen mit angegossen. In diesen wird eine Sacklochbohrung mit einem Gewinde eingebracht, in die die Lambdasonde eingeschraubt wird. Ausgehend von jedem der beiden Sammelrohre wird eine Bohrung eingebracht, beispielsweise von 8 mm Durchmesser. Beide Bohrungen enden in dem Sackloch für die Lambdasonde. Bedingt durch den Wechsel von Über- zu Unterdruck gelangt dadurch eine geringe Menge Abgas an die Lambdasonde, so daß diese den Katalysator steuern kann.This is the case with the casting elbows known in the prior art solved in the following way. There is a slug on the collecting flange with cast on. A blind hole with a Thread inserted into which the lambda probe is screwed becomes. Starting from each of the two manifolds, one Drilled hole, for example of 8 mm in diameter. Both holes end in the blind hole for the lambda sensor. Due to the change from overpressure to underpressure thereby a small amount of exhaust gas to the lambda sensor, so that this can control the catalyst.

Bei den ebenfalls bekannten Rohrkrümmern müßte man in diesem Fall einen Sammelflansch aus Guß bzw. aus einem sehr dicken Flachstahl herstellen, damit sowohl die Sackbohrung für die Lambdasonde als auch die Verbindungsbohrungen eingebracht werden könnten.
Bei einem bekannten Rohrkrümmer dieser Art (US-A-4 833 882) ist der Flansch mit zwei Rohransätzen als einstückiges gegossenes Teil ausgebildet. Eine senkrecht zu den Öffnungen für die Sammelrohre verlaufende Bohrung schneidet die Bohrungen für die Sammelrohre. In diese Bohrung kann ein Gassensor eingesetzt werden.
Zur Anbringung der Zylinderrohre eines Auspuffkrümmers an dem Zylinderkopf selbst ist bereits eine Flanschverbindung bekannt (DE-OS 43 13 091), bei dem der Flansch zweiteilig aus einer Dichtplatine und einer Haube ausgebildet ist, die zwar mit der Dichtplatine allseits verschweißt ist, aber einen Hohlraum mit der Dichtplatine bildet. In den Hohlraum kann Sekundärluft eingeblasen werden oder eine Abgasrückführungsleitung angeschlossen werden.In the case of the pipe elbows, which are also known, one would have to produce a manifold flange from cast iron or from a very thick flat steel so that both the blind hole for the lambda sensor and the connecting holes could be made.
In a known pipe bend of this type (US-A-4 833 882), the flange with two pipe lugs is designed as a one-piece cast part. A hole running perpendicular to the openings for the header pipes cuts the holes for the header pipes. A gas sensor can be inserted into this hole.
A flange connection is already known for attaching the cylinder pipes of an exhaust manifold to the cylinder head itself (DE-OS 43 13 091), in which the flange is formed in two parts from a sealing plate and a hood, which is welded to the sealing plate on all sides, but has a cavity forms with the sealing plate. Secondary air can be blown into the cavity or an exhaust gas recirculation line can be connected.

Der Erfindung liegt die Aufgabe zugrunde, eine einfache, kostengünstig herzustellende und dennoch das gleichmäßige Anströmen der Lambdasonde ermöglichende Flanschverbindung für ein Auspuffsystem zu schaffen. The invention has for its object a simple, inexpensive to be produced and yet the uniform flow flange connection for an exhaust system create.

Zur Lösung dieser Aufgabe schlägt die Erfindung ein Auspuffsystem mit den Merkmalen des Anspruchs 1 vor. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.To achieve this object, the invention proposes an exhaust system with the features of claim 1. Further training of the Invention are the subject of the dependent claims.

Die Herstellung des Oberteils als Blechtiefziehteil hat nicht nur den Vorteil der einfachen Herstellung, sondern den weiteren Vorteil, daß die von den Sammelrohren übertragenen Temperaturen und die daraus entstehenden Wärmedehnungen über das weiche Ziehteil abgebaut werden. Da beim Zusammenfügen von dem Oberteil mit der Dichtplatine ein Luftspalt entsteht, ergibt sich hierbei eine Isolierwirkung, bei der die Wärmebrücke weitaus geringer ist als bei einem massiven Flansch. Dies führt zu einer thermischen Entlastung der Flanschverbindung zwischen dem Auspuffkrümmer und dem Vorrohr.The production of the upper part as a deep-drawn sheet metal part has not only the advantage of simple production, but the further Advantage that the temperatures transmitted by the manifolds and the resulting thermal expansion over the soft drawn part can be dismantled. Because when merging there is an air gap in the upper part with the sealing plate there is an insulating effect at which the thermal bridge is far less than with a solid flange. This leads to a thermal relief of the flange connection between the exhaust manifold and the Forward tube.

Zum Anbringen der Lambdasonde kann ein Stutzen verwendet werden der in eine Öffnung des Oberteils eingesetzt und dort befestigt werden kann. Der Stutzen kann als Drehteil oder auch als Fließpreßteil hergestellt und mit einem Gewinde versehen sein, so daß die handelsüblichen Lambdasonden ohne jede Änderung verwendet werden können. Der Stutzen kann in die Öffnung des Oberteils eingesetzt und mit einer umlaufenden Schweißnaht mit dem Oberteil verbunden werden.Can be used to attach the lambda sensor a nozzle can be used in an opening of the upper part can be used and attached there. The neck can manufactured as a turned part or as an extruded part and with be provided with a thread so that the commercially available lambda probes can be used without any change. The Neck can be inserted into the opening of the upper part and with an all-round weld seam connected to the upper part become.

Es kann auch vorgesehen sein, daß das Oberteil in dem die Anschlußöffnung für die Lambdasonde umgebenden Bereich einen Abstand von der Dichtplatine aufweist. Somit kann eine gleichmäßigere Anströmung der Lambdasonde erreicht werden.It can also be provided that the upper part in the the connection opening for the area surrounding the lambda sensor has a distance from the sealing plate. Thus a more even flow to the lambda probe can be achieved.

Zur Befestigung des mindestens einen Sammelrohrs an dem Flansch kann das Oberteil eine seine Öffnung für das Sammelrohr umgebende, von der Dichtplatine weggerichtete Aushalsung aufweisen. An dieser Aushalsung läßt sich das Sammelrohr befestigen, insbesondere mit einer umlaufenden Schweißnaht anschweißen.To attach the at least one manifold to the The top can flange an opening for the manifold surrounding, facing away from the sealing plate Show necking. This can be done with this collar Fasten the collecting tube, especially with a rotating one Weld on the weld.

Es kann vorgesehen sein, daß das Sammelrohr nur an dem Oberteil mit einem axialen Abstand seiner Stirnkante von der Dichtplatine befestigt wird. Aufgrund des axialen Abstands der Stirnkante kann das durchströmende Gas seitlich radial durch die vorgesehene Verbindung zu der Lambdasonde gelangen. Es ist daher nicht erforderlich, ein Sammelrohr mit einer seitlichen Öffnung zu verwenden.It can be provided that the manifold only on the upper part with an axial distance from its front edge is attached by the sealing plate. Because of the axial The gas flowing through can be at a distance from the front edge laterally radially through the connection provided to the lambda probe reach. It is therefore not necessary to have a manifold to use with a side opening.

Zur Herstellung der Verbindung für das aus dem Sammelrohr austretende Gas zu der Lambdasonde kann das Oberteil eine von der Öffnung für das Sammelrohr zu dem Anschluß für die Lambdasonde führende tunnelartige Ausprägung aufweisen. Auf diese Weise kann eine Verbindung mit einer gerichteten definierten Strömung hergestellt werden. Die tunnelartige Ausprägung läßt sich bei der Herstellung des Oberteils als Blechtiefziehteil ohne zusätzlichen Arbeitsschritt sehr einfach herstellen.To make the connection for the from the manifold escaping gas to the lambda sensor can Top one from the opening for the manifold to the connector leading tunnel-like design for the lambda probe exhibit. In this way, a connection with a directional defined flow are produced. The tunnel-like expression can be in the manufacture of the Upper part as deep drawn part without additional work step very easy to manufacture.

Der Flansch kann zwei Öffnungen zum Anbringen zweier Sammelrohre aufweisen, wobei in diesem Fall der Anschluß für die Lambdasonde mit beiden Öffnungen verbunden ist. Die Lambdasonde kann dann das Abgasverhalten der zu beiden Sammelrohren führenden Zylinder des Verbrennungsmotors berücksichtigen.The flange can have two openings for attachment have two manifolds, in which case the connection connected to both openings for the lambda probe is. The lambda sensor can then determine the exhaust gas behavior of both Collector pipes leading cylinders of the internal combustion engine consider.

Es kann vorgesehen sein, daß der Anschluß für die Lambdasonde symmetrisch zu den beiden Öffnungen für die Sammelrohre angeordnet und ausgebildet ist. Damit wird dafür gesorgt, daß beide Sammelrohre gleichmäßig von der Lambdasonde überprüft werden, so daß eine echte Mittelung des Abgasverhaltens durchgeführt wird.It can be provided that the connection for the lambda sensor symmetrical to the two openings for the Collected pipes is arranged and designed. This will make it ensured that both manifolds evenly from the lambda probe be checked so that a real averaging of the exhaust gas behavior is carried out.

Die Erfindung schlägt in Weiterbildung ebenfalls vor, daß die Verbindungen zwischen den Öffnungen für die Sammelrohre und der Lambdasonde einen gleichen Strömungswiderstand aufweisen können.The invention also proposes in further training that the Connections between the openings for the manifolds and the lambda probe have the same flow resistance can.

Das Oberteil kann mit der Dichtplatine verschweißt sein, insbesondere mittels einer umlaufenden Schweißnaht.The top can be used with the Sealing plate to be welded, in particular by means of a circumferential weld.

Das Oberteil kann mindestens teilweise flächig an der Dichtplatine anliegen, insbesondere in ihrem Randbereich.The top can be at least partially flat rest on the sealing plate, especially in their Edge area.

Weitere Vorzüge der Erfindung ergeben sich aus der folgenden Beschreibung einer bevorzugten Ausführungsform der Erfindung sowie anhand der Zeichnung. Hierbei zeigen:

Fig.1
eine schematische Aufsicht auf das auf die Dichtplatine aufgelegte Oberteil einer Flanschverbindung nach der Erfindung;
Fig. 2
einen Schnitt längs Linie II-II in Fig. 1;
Fig. 3
eine perspektivische Ansicht des zusammengesetzten Flanschs mit zwei angebrachten Sammelrohren.
Further advantages of the invention result from the following description of a preferred embodiment of the invention and from the drawing. Here show:
Fig. 1
is a schematic plan view of the upper part of a flange connection placed on the sealing plate according to the invention;
Fig. 2
a section along line II-II in Fig. 1;
Fig. 3
a perspective view of the assembled flange with two attached manifolds.

Fig. 1 zeigt stark vereinfacht eine Aufsicht auf einen Teil der Flanschverbindung, nämlich auf das auf die Dichtplatine aufgelegte Oberteil 1. Das Oberteil 1 enthält, genauso wie die darunterliegende Dichtplatine 2, zwei gleich große nebeneinanderliegende Öffnungen 3 mit Kreisform. Jede Öffnung 3 ist zur Anbringung eines Sammelrohrs bestimmt, das mit einem zweiflutigen Vorrohr verbunden werden soll.Fig. 1 shows a simplified view of a part the flange connection, namely on the sealing plate applied top 1. The top 1 contains, just like the underlying sealing plate 2, two of the same size side by side Openings 3 with a circular shape. Each opening 3 is intended for the attachment of a collecting tube that is connected to a double-flow front pipe is to be connected.

Das Oberteil enthält eine dritte Öffnung 4, die ebenfalls Kreisform aufweist, im dargestellten Beispiel aber eine unterschiedliche Größe hat. Diese Öffnung bildet einen Anschluß 5 für eine Lambdasonde.The upper part contains a third opening 4, which also Has a circular shape, but a different one in the example shown Size. This opening forms a connection 5 for a lambda sensor.

Die Öffnung 4 ist symmetrisch zu den beiden Öffnungen 3 für die Sammelrohre angeordnet, das heißt, daß der Mittelpunkt des Anschlusses 5 für die Lambdasonde auf der Mittelsenkrechten zwischen den beiden Öffnungen für die Sammelrohre liegt.The opening 4 is symmetrical to the two openings 3 for the manifolds arranged, that is, the center of connection 5 for the lambda probe on the perpendicular lies between the two openings for the header pipes.

Von jeder Öffnung 3 für ein Sammelrohr führt seitlich eine tunnelartige Verbindung 6 etwa radial zu der Öffnung 4 für die Lambdasonde. Diese Verbindungen 6 sind als aus der Fläche des Oberteils heraustretende Ausprägungen ausgebildet. Beide Verbindungen 6 haben gleiche Länge und gleiche Querschnittsform, so daß sie für ein strömendes Gas auch gleichen Strömungswiderstand haben.From each opening 3 for a collecting pipe leads laterally tunnel-like connection 6 approximately radially to the opening 4 for the lambda sensor. These connections 6 are considered out of the area protrusions of the upper part are formed. Both Connections 6 have the same length and the same cross-sectional shape, so that they also have the same flow resistance for a flowing gas to have.

Die Wirkung dieser beiden Verbindungen 6 ergibt sich besser aus der Fig. 2, die einen Querschnitt längs Linie II-II in Fig. 1 darstellt. Der Querschnitt ist so gelegt, daß er durch die Mittelpunkte der Öffnung 3 und der Öffnung 4 führt und damit auch durch die Längsmittelebene der einen Verbindung 6.The effect of these two compounds 6 is better from Fig. 2, which is a cross section along line II-II in Fig. 1 represents. The cross section is laid so that it passes through the centers of the opening 3 and the opening 4 leads and thus also through the longitudinal median plane of one connection 6.

Fig. 2 zeigt das Oberteil 1 im gleichen Zustand wie Fig. 1, das heißt, in der korrekten Position auf der Dichtplatine 2 aufgelegt, ggf. auch schon befestigt. 2 shows the upper part 1 in the same state as FIG. 1, that is, in the correct position on the sealing plate 2 put on, if necessary already attached.

Die Dichtplatine 2 enthält zwei den Öffnungen 3 entsprechende Öffnungen 7, die mit den Öffnungen 3 fluchten.The sealing plate 2 contains two openings 3 corresponding Openings 7, which are aligned with the openings 3.

Die Öffnungen 3 des Oberteils 1 werden von Aushalsungen 8 gebildet, die von der Dichtplatine 2 wegragen. Die Aushalsungen 8 bilden kurze zylindrische Ansätze, in die das Sammelrohr 9 um eine kurze Strecke eingeschoben werden kann. Die Verbindung des Sammelrohrs 9 mit der Aushalsung 8 geschieht durch eine umlaufende Schweißnaht. Das Sammelrohr 9 wird nur soweit in die Aushalsung 8 eingesteckt, daß die Stirnkante 10 des Sammelrohrs einen Abstand von der Oberseite der Dichtplatine 2 beibehält.The openings 3 of the upper part 1 are formed by neckings 8, that protrude from the sealing plate 2. The necklines 8 form short cylindrical lugs into which the collecting tube 9 can be inserted a short distance. The connection of the manifold 9 with the neck 8 happens through a circumferential weld. The manifold 9 is only so far inserted into the neck 8 that the front edge 10 of the Collecting tube a distance from the top of the sealing plate 2 maintains.

Die tunnelartige Verbindung 6, die durch eine Ausprägung des Oberteils 1 gebildet ist, mündet seitlich in der Aushalsung 8. Aufgrund des axialen Abstands der Stirnkante 10 des Sammelrohrs 9 kann das aus dem Sammelrohr 9 in die Aushalsung 8 gelangende Gas seitlich durch die Verbindung 6 zu dem rechts in Fig. 2 dargestellten Bereich um die Anschlußöffnung 4 gelangen.The tunnel-like connection 6, which is characterized by an expression of the Upper part 1 is formed, opens laterally in the neck 8. Due to the axial distance of the front edge 10 of the header 9 can from the manifold 9 in the neck 8th Gas arriving laterally through connection 6 to the right area around the connection opening 4 shown in FIG.

Das Oberteil 1 weist in dem die Öffnung 4 umgebenden Bereich ebenfalls, ähnlich wie im Bereich der Verbindung 6, einen Abstand von der Dichtplatine auf. Der Querschnitt des Übergangs 11 ist etwa viertelbogenförmig. In diesen Bereich mündet die Verbindung 6.The upper part 1 has in the area surrounding the opening 4 likewise, similar to the area of connection 6, one Distance from the sealing plate. The cross section of the transition 11 is approximately quarter-arch. in this area opens the connection 6.

In die Öffnung 4 wird ein Stutzen 12 eingesetzt, der in Fig. 2 etwas oberhalb der Öffnung 4 dargestellt ist. Bei dem Stutzen 12 kann es sich um ein Drehteil oder ein Fließpreßteil handeln. Dieser Stutzen 12 enthält auf seiner nicht dargestellten, von dem Oberteil 1 abgewandten Seite ein Gewinde, so daß eine handelsübliche Lambdasonde eingeschraubt werden kann. Die Verbindung des Stutzens 12 mit dem Oberteil geschieht ebenfalls so, daß die Stirnkante 13 einen Abstand von der Dichtplatine 2 aufweist. Wiederum kann eine Schweißnaht längs des Umfangs des Stutzens 12 zu ihrer Verbindung mit dem Oberteil 1 dienen.In the opening 4, a nozzle 12 is inserted, which in Fig. 2 is shown slightly above the opening 4. In which Socket 12 can be a turned part or an extruded part act. This nozzle 12 does not contain on his illustrated, facing away from the upper part 1, a thread, so that a commercially available lambda probe is screwed in can be. The connection of the connector 12 to the upper part also happens so that the front edge 13 a distance from the sealing plate 2. Again, a weld can be made along the circumference of the connector 12 for their connection serve with the top 1.

Nach Verschweißung der Sammelrohre 9 und des Stutzens 12 mit dem Oberteil und der Verschweißung des Oberteils 1 mit der Dichtplatine 2 ist ein Flansch entstanden, der mit einem Vorrohr verbunden werden kann. Zur Verbindung mit diesem weiterführenden Bauteil können beispielsweise Stehbolzen oder Schraubbolzen 14 dienen, für die in Fig. 1 schematisch Löcher 15 angedeutet sind. Diese Löcher können sowohl in der Dichtplatine 2 als auch in dem Oberteil 1 vorhanden sein. Es ist aber ebenfalls möglich, daß die Löcher 15 nur in der Dichtplatine vorhanden sind, so daß das Oberteil 1 im Bereich dieser Löcher 15 zur Unterbringung der Köpfe von Schraubbolzen Ausbeulungen 16 aufweist, die bei der perspektivischen Ansicht in Fig. 3 dargestellt sind. Fig. 3 zeigt eine perspektivische Ansicht eines mit zwei Sammelrohren 9 versehenen Flanschs. Man kann der Fig. 3 auch entnehmen, daß die Sammelrohre und der Stutzen 12 auch schräg gegenüber der Ebene des Flanschs angeordnet sein können. Deutlich ist auch hier die Verbindung 6 zwischen dem Anschluß für die Lambdasonde und dem Sammelrohr 9 zu sehen, die durch eine tunnelartige Ausprägung des Oberteils 1 des Flansches gebildet wird.After welding the manifolds 9 and the nozzle 12 with the upper part and the welding of the upper part 1 with the Sealing board 2 is a flange that has a Connected fore-pipe can be. For connection to this further component can be, for example, stud bolts or screw bolts 14 serve for the holes 15 schematically indicated in Fig. 1 are. These holes can both in the sealing plate 2 as also be present in the upper part 1. But it is also possible that the holes 15 only exist in the sealing plate are so that the upper part 1 in the area of these holes 15 for Housing the heads of bolt bulges 16 which is shown in the perspective view in Fig. 3 are. Fig. 3 shows a perspective view a flange provided with two manifolds 9. One can 3 also shows that the header pipes and the connecting piece 12 also arranged obliquely with respect to the plane of the flange could be. The connection 6 is also clear here between the connection for the lambda sensor and the manifold 9 seen through a tunnel-like design of the upper part 1 of the flange is formed.

Der so entstandene, am Ende eines Auspuffkrümmers angeordnete Flansch kann dann mit dem weiterführenden Vorrohr verbunden werden, beispielsweise durch Verschrauben unter Verwendung der Stehbolzen 14. Ebenfalls möglich wäre eine Verkeilung.The resulting one, located at the end of an exhaust manifold The flange can then be connected to the forward tube be used, for example by screwing the stud bolt 14. Wedging would also be possible.

Claims (12)

  1. Exhaust system with at least one header (9), of an exhaust manifold, a forepipe to a catalytic converter casing and a flange receiving a lambda probe as a connecting element, the flange having in each case one opening (7) for the header (9) and the forepipe and a connection (5) for the lambda probe, which is connected to at least one opening (7) of the flange, characterized in that the flange has a sealing blank (2) and an upper part (1) connected to said sealing blank (2) and which is constructed as a deep-drawn metal part and with each opening (7) of the sealing blank (2) has a coinciding opening (2) and the connection (5) for the lambda probe.
  2. Exhaust system according to claim 1, wherein the connection (5) for the lambda probe has an opening (4) for the insertion and fixing of a connecting piece (12), in which the lambda probe can be fixed, particularly by screwing.
  3. Exhaust system according to claim 1 or 2, wherein in the vicinity of the connection for the lambda probe the upper part (1) has a spacing from the sealing blank (2).
  4. Exhaust system according to one of the preceding claims, wherein the upper part (1) has a neck (8) directed away from the sealing blank (2) and surrounding its opening (3) for the header (9) for fitting the latter.
  5. Exhaust system according to one of the preceding claims, wherein the header (9) is only fixed to the upper part (1) with an axial spacing of its leading edge (10) from the sealing blank (2).
  6. Exhaust system according to one of the preceding claims, wherein the upper part (1) has a tunnel-like stamping out leading from the opening (3) for the header (9) to the connection (5) for the lambda probe.
  7. Exhaust system according to one of the preceding claims, having two openings (3) for fitting two headers (9), the connection (5) for the lambda probe being connected to both openings (3).
  8. Exhaust system according to claim 7, wherein the connection (5) for the lambda probe is arranged and constructed symmetrically to both openings (3) for the headers (9).
  9. Exhaust system according to claim 7 or 8, wherein the two connections between the openings (3, 7) for the headers (9) and the connection (5) for the lambda probe have the same flow resistance.
  10. Exhaust system according to one of the preceding claims, wherein the upper part (1) is welded to the sealing blank (2), particularly along the edge.
  11. Exhaust system according to one of the claims 1 to 9, wherein the upper part (1) is soldered to the sealing blank (2).
  12. Exhaust system according to one of the preceding claims, wherein the upper part (1) engages at least partly in flat manner on the sealing blank (2), particularly in its marginal area.
EP95118038A 1994-11-30 1995-11-16 Exhaust system Expired - Lifetime EP0715064B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4442573A DE4442573A1 (en) 1994-11-30 1994-11-30 Flange connection
DE4442573 1994-11-30

Publications (2)

Publication Number Publication Date
EP0715064A1 EP0715064A1 (en) 1996-06-05
EP0715064B1 true EP0715064B1 (en) 2000-03-22

Family

ID=6534517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118038A Expired - Lifetime EP0715064B1 (en) 1994-11-30 1995-11-16 Exhaust system

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EP (1) EP0715064B1 (en)
AT (1) ATE191062T1 (en)
DE (2) DE4442573A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357081A1 (en) * 2003-12-06 2005-07-07 Audi Ag Exhaust system for vehicle engines has lean burn probe mounted in inflow knuckle region and brought into exhaust gas contact with exhaust gas flows in all inlet pipes
JP4257528B2 (en) * 2004-07-05 2009-04-22 三菱自動車工業株式会社 Multi-cylinder internal combustion engine
FR2907161B1 (en) * 2006-10-16 2008-11-14 Renault Sas EXHAUST MANIFOLD OF AN ENGINE
DE102010007877A1 (en) * 2010-02-13 2011-08-18 Bayerische Motoren Werke Aktiengesellschaft, 80809 Exhaust manifold for an internal combustion engine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725944A1 (en) * 1977-06-08 1978-12-21 Daimler Benz Ag EXHAUST GAS PURIFICATION SYSTEM
JPS60150417A (en) * 1984-01-17 1985-08-08 Yamaha Motor Co Ltd Exhaust pipe of engine in motorcycle, etc.
JPH0615817B2 (en) * 1985-05-14 1994-03-02 本田技研工業株式会社 Exhaust manifold of a multi-cylinder internal combustion engine
JPH055215Y2 (en) * 1986-10-28 1993-02-10
DE4313091A1 (en) 1993-04-22 1994-10-27 Bischoff Erhardt Gmbh Co Kg Flange for the fixing of pipes
DE4315086A1 (en) * 1993-05-06 1994-11-10 Roth Technik Gmbh Flange for manifolds on internal combustion engines

Also Published As

Publication number Publication date
DE4442573A1 (en) 1996-06-05
DE59508046D1 (en) 2000-04-27
ATE191062T1 (en) 2000-04-15
EP0715064A1 (en) 1996-06-05

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