EP1083307A1 - Exhaust system of multicylinder internal combustion engines comprising an exhaust manifold made of metal sheet and a catalytic converter - Google Patents

Exhaust system of multicylinder internal combustion engines comprising an exhaust manifold made of metal sheet and a catalytic converter Download PDF

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Publication number
EP1083307A1
EP1083307A1 EP00114082A EP00114082A EP1083307A1 EP 1083307 A1 EP1083307 A1 EP 1083307A1 EP 00114082 A EP00114082 A EP 00114082A EP 00114082 A EP00114082 A EP 00114082A EP 1083307 A1 EP1083307 A1 EP 1083307A1
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EP
European Patent Office
Prior art keywords
shell
exhaust
collecting space
exhaust manifold
manifold according
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
EP00114082A
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German (de)
French (fr)
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EP1083307B1 (en
Inventor
Andre Kuphal
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Volkswagen AG
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Volkswagen AG
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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
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F01N13/1877—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal the channels or tubes thereof being made integrally with the housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing

Definitions

  • the invention relates to an exhaust manifold made of sheet metal for multi-cylinder Internal combustion engines with those mentioned in the preamble of the main claim Characteristics.
  • EP 0 818 616 A1 has previously disclosed an exhaust manifold for internal combustion engines, in which an exhaust pipe is led individually from the cylinders of the engine to a collecting space and is curved in the direction of the crankcase.
  • a lower shell embossed as the first shell and an upper shell made of sheet metal designed as a second shell form both exhaust pipes and a collecting space in which the exhaust pipes open.
  • the spatially curved course of the connection plane of the upper and lower shell is disadvantageous.
  • the document DE 31 07 897 A1 discloses an exhaust manifold for multi-cylinder internal combustion engines, which is designed as a cast part and has exhaust pipes which are led individually from the cylinders to an expanding manifold. The flow is redirected in the exhaust pipes and directed into the collecting space. When looking at the exhaust pipes, the collecting space has a circular cross section. Two mutually opposite exhaust pipes open at an obtuse angle and two further adjacent exhaust pipes at an acute angle to each other. Some of the flow from the exhaust pipes reaches the collecting space in the center or tangentially.
  • the object of the invention to provide a generic exhaust manifold made of sheet metal shells with a collecting space which promotes mixing of the exhaust gases and ensures a uniform temperature and optimal mixing for the exhaust gases flowing to the catalyst.
  • a simple connection of the sheet metal shells should be possible.
  • the connecting plane of the first shell which is preferably embodied as an upper shell
  • the second shell which is preferably embodied as a lower shell
  • the exhaust manifold essentially consists of a first shell, upper shell 1 (Fig. 1a) and a second shell, lower shell 2 (Fig. 1b). Both consist of Sheet metal and are through at their essentially flat connection level Welds joined together.
  • Exhaust pipes 3 to 6 (FIGS. 1a, 1b) - each represented as half pipes 3a, 3b to 6a, 6b - lead from the engine cylinders to a collecting space 7, which consists of parts 7a, 7b in the upper shell 1 and the lower shell 2 is formed.
  • the collecting space 7 When looking into the respectively hollow-embossed side of the upper shell 1 (FIG. 2) and lower shell 2 (FIG. 1b), the collecting space 7 has a circular or oval cross section.
  • the exhaust pipes 3a, 3b, 5a, 5b or 4a, 4b, 6a, 6b open into the collecting space 7 over a wide area of its circumference, so that a rotating flow in the collecting space 7 is preferably established.
  • the exhaust gas flows from the exhaust pipes 3 to 6 are mixed in the collecting space 7 and diverted approximately at a right angle.
  • a receiving opening 8 for the exhaust gas probe 9 is arranged in the upper shell 1 in part 7a of the collecting space 7. Their position is chosen so that a uniform flow against the exhaust gas probe 9 is guaranteed by the exhaust gases from all exhaust pipes 3 to 6.
  • a catalyst 13 is detachably or fixedly arranged on the mounting flange 12 of the outflow opening 11, see FIG. 3.
  • the catalyst 13 is attached to the side of the engine, with its axis running in a direction approximately parallel to the cylinder block.
  • Fig. 3 the exhaust manifold with the welded half-shells - upper shell 1 and lower shell 2 - and the exhaust pipes 3, 4, 5, 6 formed therewith, the collecting space 7 and the connected catalyst 13 is shown. Furthermore, the exhaust gas probe 9 reaching into the collecting space 7 can be seen.
  • Fig. 4 shows a section through the area of the transition from the collecting space 7 of the Exhaust manifold to the catalyst 13.
  • the part 7b of the collecting space 7 in the lower shell 2 advantageously has a larger one Volume than the part 7a in the upper shell 1. This is advantageous achieved that there is a clear flow and rotation direction of the exhaust gases their entry into the collection space from the relatively small volume of the upper shell in Direction towards the larger sub-shell volume.
  • the cross section of the The collecting space 7 in its part 7b decreases in the direction of the outflow opening 11 down to about their diameter. The diameter of the outflow opening is 11 executed much smaller than that of the catalyst 13, such that a Cross-sectional jump.
  • This version of the transition from the collecting space 7 of the exhaust manifold to Catalyst 13 ensures that after the entry of the exhaust gases from the exhaust pipes 3 to 6 in the collecting space 7, especially in the volume of its part 7b in the lower shell 2 to the catalytic converter 13, rotating exhaust gas flow.
  • the advantage of the invention is the good mixing of the individual exhaust gas flows in the Collection room 7 and the uniform temperature achieved for the Catalyst 13 flowing exhaust gases.

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

Abstract

The pipe has preformed metal plate upper (1) and lower (2) shells, which are welded in a plane to form a collection space (7), into which individual exhaust gas pipes open. The collection space has a circular or oval cross-section with a funnel shape at the lower side connected to an exhaust opening (11). The exhaust opening of the collection space is connected to an exhaust unit or a catalyst (13) and has a smaller diameter than the catalyst.

Description

Die Erfindung bezieht sich auf ein Abgassammelrohr aus Blech für mehrzylindrige Verbrennungsmotoren mit den im Oberbegriff des Hauptanspruches genannten Merkmalen.The invention relates to an exhaust manifold made of sheet metal for multi-cylinder Internal combustion engines with those mentioned in the preamble of the main claim Characteristics.

Vorbekannt ist durch die Schrift EP 0 818 616 A1 ein Abgassammelrohr für Verbrennungsmotoren, bei dem von den Zylindern des Motors jeweils ein Abgasrohr einzeln bis zu einem Sammelraum geführt und in Richtung Kurbelgehäuse gekrümmt ausgebildet ist. Je eine als erste Schale geprägte Unterschale und eine als zweite Schale ausgebildete Oberschale aus Blech bilden im verbundenen Zustand sowohl Abgasrohre auch einen Sammelraum, in dem die Abgasrohre münden.
Nachteilig ist der räumlich gebogene Verlauf der Verbindungsebene von Ober- und Unterschale.EP 0 818 616 A1 has previously disclosed an exhaust manifold for internal combustion engines, in which an exhaust pipe is led individually from the cylinders of the engine to a collecting space and is curved in the direction of the crankcase. In the connected state, a lower shell embossed as the first shell and an upper shell made of sheet metal designed as a second shell form both exhaust pipes and a collecting space in which the exhaust pipes open.
The spatially curved course of the connection plane of the upper and lower shell is disadvantageous.

Weiterhin ist durch die Schrift DE 31 07 897 A1 ein Abgassammelrohr für mehrzylindrige Verbrennungsmotoren vorbekannt, das als Gußteil ausgebildet ist und Abgasrohre aufweist, die von den Zylindern einzeln bis zu einem sich erweiternden Sammelraum geführt sind.
Bereits in den Abgasrohren wird die Strömung umgelenkt und in den Sammelraum geleitet. Bei Sicht auf die Abgasrohre weist der Sammelraum einen kreisförmigen Querschnitt auf. Zwei zueinander gegenüber liegende Abgasrohre münden in einem stumpfen Winkel und zwei weitere nebeneinander liegende Abgasrohre in einem spitzen Winkel zueinander. Von den Abgasrohren gelangt die Strömung teilweise mittig bzw. tangential in den Sammelraum.Furthermore, the document DE 31 07 897 A1 discloses an exhaust manifold for multi-cylinder internal combustion engines, which is designed as a cast part and has exhaust pipes which are led individually from the cylinders to an expanding manifold.
The flow is redirected in the exhaust pipes and directed into the collecting space. When looking at the exhaust pipes, the collecting space has a circular cross section. Two mutually opposite exhaust pipes open at an obtuse angle and two further adjacent exhaust pipes at an acute angle to each other. Some of the flow from the exhaust pipes reaches the collecting space in the center or tangentially.

Es ist die Aufgabe der Erfindung, ein gattungsgemäßes, aus Blechschalen gebildetes Abgassammelrohr mit einem Sammelraum zu versehen, der eine Vermischung der Abgase fördert und eine gleichmäßige Temperatur und optimale Vermischung für die zum Katalysator strömende Abgase gewährleistet. Gleichzeitig soll eine einfache Verbindung der Blechschalen möglich sein.
Die erfindungsgemäße Lösung der Aufgabe erfolgt durch die im kennzeichnenden Teil der Patentansprüche genannten Merkmale. Erfindungsgemäß verläuft die Verbindungsebene der vorzugsweise als Oberschale augebildeten ersten Schale und der vorzugsweise als Unterschale ausgebildeten zweiten Schale im wesentlichen plan, dabei bilden beide Schalen einen Sammelraum, in dem die Abgase der einzelnen Zylinder intensiv vermischt und zum Katalysator geleitet werden. Hierdurch stellt sich eine bezüglich der Temperaturverteilung gleichmäßige Beaufschlagung des Katalysators ein. Exotherme Nachreaktionen finden im Sammelraum statt und halten so die Katalysatoroberflache frei von einer möglichen, örtlichen Überhitzung.It is the object of the invention to provide a generic exhaust manifold made of sheet metal shells with a collecting space which promotes mixing of the exhaust gases and ensures a uniform temperature and optimal mixing for the exhaust gases flowing to the catalyst. At the same time, a simple connection of the sheet metal shells should be possible.
The object of the invention is achieved by the features mentioned in the characterizing part of the claims. According to the invention, the connecting plane of the first shell, which is preferably embodied as an upper shell, and of the second shell, which is preferably embodied as a lower shell, runs essentially flat, both shells forming a collecting space in which the exhaust gases of the individual cylinders are mixed intensively and passed to the catalyst. This results in an even loading of the catalyst with respect to the temperature distribution. Exothermic post-reactions take place in the collecting room and thus keep the catalyst surface free of possible local overheating.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand einer Zeichnung beschrieben.An embodiment of the invention is described below with reference to a drawing described.

Es zeigt:

Fig. 1a und 1b
die Ober- und Unterschale,
Fig. 2
die Unterseite der Oberschale,
Fig. 3
das Abgassammelrohr mit Katalysator,
Fig. 4
den Bereich des Überganges vom Sammelraum des Abgassammelrohres zum Katalysator.
It shows:
1a and 1b
the upper and lower shell,
Fig. 2
the bottom of the top shell,
Fig. 3
the exhaust manifold with catalyst,
Fig. 4
the area of the transition from the collecting space of the exhaust manifold to the catalytic converter.

Das Abgassammelrohr besteht im wesentlichen aus einer ersten Schale, Oberschale 1 (Fig. 1a) und einer einer zweiten Schale, Unterschale 2 (Fig. 1b). Beide bestehen aus Blech und werden an ihrer im wesentlichen planen Verbindungsebene durch Schweißnähte miteinander verbunden.The exhaust manifold essentially consists of a first shell, upper shell 1 (Fig. 1a) and a second shell, lower shell 2 (Fig. 1b). Both consist of Sheet metal and are through at their essentially flat connection level Welds joined together.

Von den Motorzylindern führen Abgasrohre 3 bis 6 (Fig. 1a, Fig. 1b) - jeweils als Halbrohre 3a, 3b bis 6a, 6b dargestellt - zu einem Sammelraum 7, der aus Teilen 7a, 7b in der Oberschale 1 bzw. der Unterschale 2 gebildet ist.
Bei Sicht in die jeweils hohlgeprägte Seite der Oberschale 1 (Fig. 2) und Unterschale 2 (Fig. 1b) weist der Sammelraum 7 einen kreisförmigen oder ovalen Querschnitt auf. Die Abgasrohre 3a, 3b, 5a, 5b bzw. 4a, 4b, 6a, 6b münden im Sammelraum 7 über einen weiten Bereich dessen Umfanges, so daß sich vorzugsweise eine rotierende Strömung im Sammelraum 7 einstellt. Die Abgasströme aus den Abgasrohren 3 bis 6 werden in dem Sammelraum 7 vermischt und etwa im rechten Winkel umgelenkt.
Innerhalb der Oberschale 1 ist im Teil 7a des Sammelraumes 7 eine Aufnahmeöffnung 8 für die Abgassonde 9 angeordnet. Ihre Lage wird so gewählt, daß ein gleichmäßiges Anströmen der Abgassonde 9 von den Abgasen aus allen Abgasrohren 3 bis 6 gewährleistet ist.
Von der hohlgeprägten Seite der Unterschale 2 ausgehend ist eine aus dem Teil 7b des Sammelraumes 7 heraus führende, vorzugsweise zentrische Abströmöffnung 11 vorhanden, die von einem Befestigungsflansch 12 der Unterschale 2 umgeben ist. Am Befestigungsflansch 12 der Abströmöffnung 11 ist ein Katalysator 13 lösbar oder fest angeordnet, siehe Fig. 3. Der Katalysator 13 ist seitlich am Motor, mit seiner Achse in einer Richtung etwa parallel zum Zylinderblock verlaufend, befestigt.
In Fig. 3 ist das Abgassammelrohr mit den verschweißten Halbschalen - Oberschale 1 und Unterschale 2 - und den damit gebildeten Abgasrohren 3, 4, 5, 6, dem Sammelraum 7 sowie dem angeschlossenen Katalysator 13 dargestellt. Weiterhin ist die in den Sammelraum 7 hinein reichende Abgassonde 9 erkennbar.Exhaust pipes 3 to 6 (FIGS. 1a, 1b) - each represented as half pipes 3a, 3b to 6a, 6b - lead from the engine cylinders to a collecting space 7, which consists of parts 7a, 7b in the upper shell 1 and the lower shell 2 is formed.
When looking into the respectively hollow-embossed side of the upper shell 1 (FIG. 2) and lower shell 2 (FIG. 1b), the collecting space 7 has a circular or oval cross section. The exhaust pipes 3a, 3b, 5a, 5b or 4a, 4b, 6a, 6b open into the collecting space 7 over a wide area of its circumference, so that a rotating flow in the collecting space 7 is preferably established. The exhaust gas flows from the exhaust pipes 3 to 6 are mixed in the collecting space 7 and diverted approximately at a right angle.
A receiving opening 8 for the exhaust gas probe 9 is arranged in the upper shell 1 in part 7a of the collecting space 7. Their position is chosen so that a uniform flow against the exhaust gas probe 9 is guaranteed by the exhaust gases from all exhaust pipes 3 to 6.
Starting from the hollow embossed side of the lower shell 2 there is a preferably central outflow opening 11 leading out of the part 7b of the collecting space 7, which is surrounded by a fastening flange 12 of the lower shell 2. A catalyst 13 is detachably or fixedly arranged on the mounting flange 12 of the outflow opening 11, see FIG. 3. The catalyst 13 is attached to the side of the engine, with its axis running in a direction approximately parallel to the cylinder block.
In Fig. 3, the exhaust manifold with the welded half-shells - upper shell 1 and lower shell 2 - and the exhaust pipes 3, 4, 5, 6 formed therewith, the collecting space 7 and the connected catalyst 13 is shown. Furthermore, the exhaust gas probe 9 reaching into the collecting space 7 can be seen.

Fig. 4 zeigt einen Schnitt durch den Bereich des Überganges vom Sammelraum 7 des Abgassammelrohres zum Katalysator 13.Fig. 4 shows a section through the area of the transition from the collecting space 7 of the Exhaust manifold to the catalyst 13.

Vorteilhaft weist der Teil 7b des Sammelraumes 7 in der Unterschale 2 ein größeres Volumen als der Teil 7a in der Oberschale 1 auf. Hierdurch wird vorteilhafterweise erreicht, daß sich eine eindeutige Strömungs- und Rotationsrichtung der Abgase nach deren Eintritt in den Sammelraum von dem relativ kleinen Volumen der Oberschale in Richtung auf das größere Unterschalenvolumen einstellt. Der Querschnitt des Sammelraumes 7 in dessen Teil 7b vermindert sich in Richtung der Abströmöffnung 11 bis etwa auf deren Durchmesser. Dabei ist der Durchmesser des Abströmöffnung 11 wesentlich kleiner als der des Katalysators 13 ausgeführt, derart, daß sich ein Querschnittssprung einstellt.The part 7b of the collecting space 7 in the lower shell 2 advantageously has a larger one Volume than the part 7a in the upper shell 1. This is advantageous achieved that there is a clear flow and rotation direction of the exhaust gases their entry into the collection space from the relatively small volume of the upper shell in Direction towards the larger sub-shell volume. The cross section of the The collecting space 7 in its part 7b decreases in the direction of the outflow opening 11 down to about their diameter. The diameter of the outflow opening is 11 executed much smaller than that of the catalyst 13, such that a Cross-sectional jump.

Diese Ausführung des Überganges vom Sammelraum 7 des Abgassammelrohres zum Katalysator 13 sichert, daß nach dem Eintritt der Abgase aus den Abgasrohren 3 bis 6 in den Sammelraum 7, sich speziell im Volumen seines Teils 7b in der Unterschale 2 eine zum Katalysator 13 gerichtete, rotierende Abgasströmung ausbildet.This version of the transition from the collecting space 7 of the exhaust manifold to Catalyst 13 ensures that after the entry of the exhaust gases from the exhaust pipes 3 to 6 in the collecting space 7, especially in the volume of its part 7b in the lower shell 2 to the catalytic converter 13, rotating exhaust gas flow.

Der Vorteil der Erfindung besteht im guten Vermischen der einzelnen Abgasströme im Sammelraum 7 und der dabei erzielten gleichmäßigen Temperatur für die zum Katalysator 13 strömenden Abgase.The advantage of the invention is the good mixing of the individual exhaust gas flows in the Collection room 7 and the uniform temperature achieved for the Catalyst 13 flowing exhaust gases.

Claims (7)

Abgassammelrohr aus Blech für mehrzylindrige Verbrennungsmotoren, das aus jeweils einer, aus Blech geformten ersten Schale und zweiten Schale besteht, wobei erste und zweite Schale im verbundenen Zustand von den Zylindern einzeln geführte Abgasrohre und einen Sammelraum bilden, in dem die Abgasrohre zusammengeführt münden und an dessen Abströmöffnung eine Abgasanlage bzw. ein Katalysator angeschlossen ist,
gekennzeichnet durch folgende Merkmale: erste Schale (1) und zweite Schale (2) sind als Formteile ausgebildet und mit einer im wesentlichen planen Verbindungsebene für eine Schweißverbindung versehen, der Sammelraum (7) hat bei Sicht in die jeweils hohlgeprägte Seite der ersten Schale (1) und zweiten Schale (2) einen kreisförmigen oder ovalen Querschnitt, der sich in der hohl geprägten Seite der zweiten Schale (2) trichterförmig zur Abströmöffnung (11) verengt, die im Sammelraum (7) angeordnete Abströmöffnung (11) weist einen einen Querschnittssprung bewirkenden kleineren Durchmesser als der des Katalysators (13) auf. Exhaust manifold made of sheet metal for multi-cylinder internal combustion engines, each consisting of a first shell and second shell formed from sheet metal, the first and second shells in the connected state forming individually guided exhaust pipes from the cylinders and a collecting space in which the exhaust pipes lead together and on the latter Discharge opening an exhaust system or a catalyst is connected,
characterized by the following features: the first shell (1) and the second shell (2) are formed as molded parts and are provided with an essentially flat connecting plane for a welded connection, the collecting space (7) has a circular or oval cross-section when viewed in the hollow side of the first shell (1) and second shell (2), which is funnel-shaped in the hollow side of the second shell (2) to the outflow opening (11) narrowed, the outflow opening (11) arranged in the collecting space (7) has a smaller diameter than the catalytic converter (13), causing a cross-sectional jump. Abgassammelrohr nach Anspruch 1,
dadurch gekennzeichent, daß
die erste Schale als Oberschale (1) und die zweite Schale als Unterschale (2) ausgebildet sind.Exhaust manifold according to claim 1,
characterized in that
the first shell is designed as an upper shell (1) and the second shell as a lower shell (2). Abgassammelrohr nach Anspruch 1,
dadurch gekennzeichnet, daß
die Abströmöffnung (11) des Sammelraumes (7) von einem Befestigungsflansch (12) umgeben ist. Exhaust manifold according to claim 1,
characterized in that
the outflow opening (11) of the collecting space (7) is surrounded by a fastening flange (12). Abgassammelrohr nach Anspruch 3,
dadurch gekennzeichnet, daß
an dem Befestigungsflansch (12) der Unterschale (2) der Katalysator (13) lösbar oder fest angeordnet ist.Exhaust manifold according to claim 3,
characterized in that
on the fastening flange (12) of the lower shell (2) the catalyst (13) is detachable or fixed. Abgassammelrohr nach Anspruch 2,
dadurch gekennzeichnet, daß
innerhalb der Oberschale (1) im Sammelraum (7) eine Abgassonde (9) angeordnet ist.Exhaust manifold according to claim 2,
characterized in that
An exhaust gas probe (9) is arranged inside the upper shell (1) in the collecting space (7). Abgassammelrohr nach Anspruch 5,
dadurch gekennzeichnet, daß
die Abgassonde (9) in einer von allen Abgasrohren (3 bis 6) angeströmten Lage angeordnet ist.Exhaust manifold according to claim 5,
characterized in that
the exhaust gas probe (9) is arranged in a position against which all exhaust pipes (3 to 6) flow. Abgassammelrohr nach Anspruch 2,
dadurch gekennzeichnet, daß
ein größerer Teil (7b) des Volumens des Sammelraumes (7) in der Unterschale (2) ausgebildet ist.Exhaust manifold according to claim 2,
characterized in that
a larger part (7b) of the volume of the collecting space (7) is formed in the lower shell (2).
EP00114082A 1999-08-14 2000-07-07 Exhaust system of multicylinder internal combustion engines comprising an exhaust manifold made of metal sheet and a catalytic converter Expired - Lifetime EP1083307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19938689 1999-08-14
DE19938689A DE19938689A1 (en) 1999-08-14 1999-08-14 Exhaust gas collection pipe for multicylinder internal combustion engine; has preformed metal plate upper and lower shells welded to form round or ovoid collection space opening into catalyst

Publications (2)

Publication Number Publication Date
EP1083307A1 true EP1083307A1 (en) 2001-03-14
EP1083307B1 EP1083307B1 (en) 2003-03-12

Family

ID=7918480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00114082A Expired - Lifetime EP1083307B1 (en) 1999-08-14 2000-07-07 Exhaust system of multicylinder internal combustion engines comprising an exhaust manifold made of metal sheet and a catalytic converter

Country Status (3)

Country Link
EP (1) EP1083307B1 (en)
AT (1) ATE234422T1 (en)
DE (2) DE19938689A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9488091B2 (en) 2013-04-18 2016-11-08 Mazda Motor Corporation Exhaust pipe structure with catalyst for engine
RU196558U1 (en) * 2019-09-10 2020-03-04 Общество с ограниченной ответственностью "Форесия-Металлопродукция Икзост Системс" EXHAUST CATALYTIC COLLECTOR FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINES
RU196579U1 (en) * 2019-08-15 2020-03-05 Общество с ограниченной ответственностью «Форесия- Металлопродукция Икзост Системс» CATALYTIC COLLECTOR OF THE EXHAUST GAS SYSTEM OF THE INTERNAL COMBUSTION ENGINE

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JP4394868B2 (en) * 2002-07-30 2010-01-06 日産自動車株式会社 Engine exhaust system
FR2991714B1 (en) * 2012-06-07 2017-06-09 Renault Sas SYSTEM FOR COLLECTING AND PURIFYING EXHAUST GAS
DE102018124926A1 (en) 2018-10-09 2020-04-09 Bayerische Motoren Werke Aktiengesellschaft Vehicle seat

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Publication number Priority date Publication date Assignee Title
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JPH1026037A (en) * 1996-07-09 1998-01-27 Yutaka Giken Co Ltd Sensor mounting boss
FR2777320B1 (en) * 1998-04-09 2000-09-22 Renault EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE

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JPH05171932A (en) * 1991-12-24 1993-07-09 Hino Motors Ltd Exhaust manifold and its manufacture

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* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 584 (M - 1501) 25 October 1993 (1993-10-25) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9488091B2 (en) 2013-04-18 2016-11-08 Mazda Motor Corporation Exhaust pipe structure with catalyst for engine
RU196579U1 (en) * 2019-08-15 2020-03-05 Общество с ограниченной ответственностью «Форесия- Металлопродукция Икзост Системс» CATALYTIC COLLECTOR OF THE EXHAUST GAS SYSTEM OF THE INTERNAL COMBUSTION ENGINE
RU196558U1 (en) * 2019-09-10 2020-03-04 Общество с ограниченной ответственностью "Форесия-Металлопродукция Икзост Системс" EXHAUST CATALYTIC COLLECTOR FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINES

Also Published As

Publication number Publication date
DE50001432D1 (en) 2003-04-17
DE19938689A1 (en) 2001-02-15
ATE234422T1 (en) 2003-03-15
EP1083307B1 (en) 2003-03-12

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