DE10261880A1 - Exhaust system for motor vehicle internal combustion engine with ends of collector channels axially movable w.r.t flow openings of catalytic converter - Google Patents
Exhaust system for motor vehicle internal combustion engine with ends of collector channels axially movable w.r.t flow openings of catalytic converter Download PDFInfo
- Publication number
- DE10261880A1 DE10261880A1 DE10261880A DE10261880A DE10261880A1 DE 10261880 A1 DE10261880 A1 DE 10261880A1 DE 10261880 A DE10261880 A DE 10261880A DE 10261880 A DE10261880 A DE 10261880A DE 10261880 A1 DE10261880 A1 DE 10261880A1
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- Prior art keywords
- converter
- exhaust system
- flow
- connecting sleeve
- collector channel
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Classifications
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- 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
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- 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
- F01N13/011—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 two or more purifying devices arranged in parallel
- F01N13/017—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 two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
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- 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
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- 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
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- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
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- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
-
- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
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- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/16—Exhaust treating devices having provisions not otherwise provided for for reducing exhaust flow pulsations
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- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
-
- 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
-
- 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
- F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
-
- 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
-
- 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
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
-
- 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
- F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Abgasanlage zur Ableitung und Reinigung eines von einer Brennkraftmaschine erzeugten Abgasstroms, mit einer zwei strömungsmäßig getrennte Sammlerkanäle umfassenden Abgasleitung und einem darin angeordneten, von dem in jedem Sammlerkanal geführten Teilstrom separat durchströmten katalytischen Konverter. Eine derartige Abgasanlage wird insbesondere zusammen mit einer Brennkraftmaschine in Form eines mehrzylindrischen Kraftfahrzeugmotors eingesetzt. Hierbei ist es üblich, das von den verschiedenen Zylindern ausgestoßene Abgas in zumindest zwei Sammlerkanälen getrennt voneinander abzuleiten, um eine unerwünschte, leistungsmindernde Wechselwirkung zwischen den von verschiedenen Zylindern ausgestoßenen Abgaspulsen zu unterbinden.The invention relates to a Exhaust system for the discharge and cleaning of an internal combustion engine generated exhaust gas flow, with a two flow-separated collector channels Exhaust line and one located therein, one in each manifold led partial flow flowed through separately catalytic converter. Such an exhaust system is particularly together with an internal combustion engine in the form of a multi-cylindrical Motor vehicle engine used. It is common here that of the different Cylinders ejected To discharge exhaust gas separately from one another in at least two collector channels, to an unwanted, performance-reducing interaction between those of different cylinders expelled Prevent exhaust gas pulses.
Nach herkömmlicher Technik werden die Sammlerkanäle zumeist stromauf des katalytischen Konverters zusammengeführt. Somit ist am Eingang des Konverters eine Mischkammer gebildet, in der sich die in verschiedenen Sammlerkanälen geführten Teilströme vermischen. Verstärkt durch die beengten Platzverhältnisse, denen eine in einem Kraftfahrzeug eingesetzte Abgasanlage unterliegt und die sich daraus ergebenden kurzen Strömungswege, ist das Problem der leistungsmindernden gasdynamischen Beeinflussung verschiedener Teilströme hiermit lediglich an den Strömungseinlass des Konverters verlagert. Die mit Turbulenzerzeugung und Druckschwankungen verbundenen gasdynamischen Wechselwirkungen führen hier zudem zu einem verminderten Wirkungsgrad der katalytischen Abgasreinigung und einer vergleichsweise hohen Materialbelastung des Konverters, die sich wiederum nachteilig auf dessen Verschleißanfälligkeit auswirkt.The collector channels are mostly based on conventional technology merged upstream of the catalytic converter. Consequently a mixing chamber is formed at the entrance of the converter, in which the in different collector channels Mix the guided partial flows. reinforced due to the limited space, to which an exhaust system used in a motor vehicle is subject and the resulting short flow paths is the problem the performance-reducing gas dynamic influencing of various substreams hereby only to the flow inlet of the converter. The one with turbulence generation and pressure fluctuations associated gas dynamic interactions also lead to reduced efficiency catalytic exhaust gas cleaning and a comparatively high one Material stress on the converter, which in turn adversely affects its susceptibility to wear effect.
In der
Der Erfindung liegt die Aufgabe zugrunde, eine Abgasanlage zur Ableitung und Reinigung eines von einer Brennkraftmaschine erzeugten Abgasstroms anzugeben, bei der unter Vermeidung der genannten Nachteile eine mehrflutige, d.h. bezüglich mehrerer in verschiedenen Sammlerkanälen herangeführten Teilströmen separate Durchströmung eines katalytischen Konverters ermöglicht ist.The invention has for its object a Exhaust system for the discharge and cleaning of an internal combustion engine specify exhaust gas flow generated, while avoiding the aforementioned Disadvantages of a multi-flow, i.e. regarding several in different collectors channels brought up substreams separate flow a catalytic converter is made possible.
Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Patentanspruchs 1. Die Unteransprüche betreffen besonders zweckmäßige Weiterbildungen der Erfindung.According to the invention, this object is achieved by the features of claim 1. The subclaims relate to particularly useful training the invention.
Erfindungsgemäß ist vorgesehen, dass ein an den Konverter angrenzendes Abschnittsende des oder jeden Sammlerkanals axial beweglich in einer mit dem Abschnittsende korrespondierenden Strömungsöffnung des Konverters geführt ist. Infolge dieser flexiblen Verbindung zwischen Konverter und dem Sammlerkanal können bei betriebsbedingten Temperaturänderungen der Sammlerkanal und der Konverter "gegeneinander arbeiten", ohne dass Materialspannungen auftreten. Hierdurch wird auf einfache Weise eine besonders geringe Verschleißanfälligkeit der Abgasanlage erreicht.According to the invention it is provided that an the converter adjacent section end of the or each collector channel axially movable in a corresponding to the end of the section Flow opening of the Led converter is. As a result of this flexible connection between the converter and the Collector channel can with operational temperature changes the collector channel and the converter "work against each other" without material stress occur. This makes it particularly easy in a simple manner susceptibility to wear reached the exhaust system.
Die axial bewegliche Führung des Abschnittsendes bezüglich der korrespondierenden Strömungsöffnung wird in bevorzugter Ausführung auf konstruktiv einfache Weise realisiert, indem das Abschnittsende in die Strömungsöffnung eingesteckt ist.The axially movable guide of the Section end regarding the corresponding flow opening in a preferred version constructively simple way realized by the section end is inserted into the flow opening.
In einer vorteilhaften Weiterentwicklung der Erfindung ist das Abschnittsende mit einem, den Querschnitt des Sammlerkanals zum Konverter hin aufweitenden Leittrichter versehen, der an seinem Freiende einen mit einem im Wesentlichen konstanten Außenumfang versehenen Gleitbereich aufweist. Insbesondere zur Zusammenarbeit mit diesem Gleitbereich ist eine weitere vorteilhafte Ausbildung der Erfindung vorgesehen, gemäß der die Strömungsöffnung ein am Leittrichter eng anliegendes Kragenelement, insbesondere ein stoffschlüssig mit dem Konvertermaterial verbundenes Kragenblech aufweist. Das Kragenelement liegt dabei mit gerade so viel Spiel am Gleitbereich des Leittrichters an, dass dessen Axialbeweglichkeit auch bei den hohen Betriebstemperaturen gewährleistet ist. Andererseits umfasst das Kragenelement den Leittrichter derart eng, dass nur ein äußerst geringer, strömungstechnisch nicht relevanter Abgasschlupf an der Verbindungsstelle auftritt. Der im Wesentlichen konstante Außenumfang des Gleitbereichs bewirkt eine gute relative Beweglichkeit des Abschnittsendes bezüglich der Strömungsöffnung des Konverters bei gleichzeitig guter Abdichtung der Verbindungsstelle.In an advantageous further development of the invention, the section end is provided with a guide funnel which widens the cross section of the collector channel towards the converter and which has a sliding area provided with a substantially constant outer circumference at its free end. In particular for cooperation with this sliding area, a further advantageous embodiment of the invention is provided, according to which the flow opening has a collar element closely fitting on the guide funnel, in particular a collar plate which is integrally connected to the converter material. The collar element lies with just enough play on the sliding area of the guide funnel that its axial mobility is guaranteed even at high operating temperatures. On the other hand, the collar element encompasses the guide funnel in such a narrow manner that only an extremely small exhaust gas slip which is not relevant to the flow technology occurs at the connection point. The substantially constant outer circumference of the sliding area brings about a good relative mobility of the section end with respect to the currents opening of the converter with good sealing of the connection point.
Zur Fixierung des Sammlerkanals am Konverter ist vorzugsweise eine den Leittrichter umgebende Verbindungsmuffe vorgesehen, die sowohl mit dem Sammlerkanal als auch mit dem Konverter starr verbunden ist. Die Verwendung einer Verbindungsmuffe zur Fixierung des Sammlerkanals am Konverter anstelle deren unmittelbaren Fixierung ist insofern vorteilhaft, als die Verbindungsmuffe nicht direkt dem Abgasstrom ausgesetzt ist. Sie ist deshalb von Haus aus einer geringeren Materialbelastung ausgesetzt als die mit dem Abgas direkt in Berührung kommenden Teile der Abgasanlage. Darüber hinaus kommt der Verbindungsmuffe keine Leitfunktion für den Abgasstrom zu, so dass ihre Form vergleichsweise frei wählbar ist. Insbesondere ist eine spannungsvermeidende Formgebung der Verbindungsmuffe möglich. Günstig ist in diesem Zusammenhang eine Formgebung, gemäß der die Muffe an ihrem, dem Konverter zugewandten Ende einen der angrenzenden Konverterfläche in etwa gleichen Querschnitt aufweist. Die Verbindungsmuffe geht in dieser Ausführung quasi stetig in den Mantel des Konverters über, so dass besonders spannungsanfällige Kanten oder Sprünge an der Nahtstelle zwischen der Verbindungsmuffe und dem Konverter vermieden sind. Das entgegengesetzte und damit dem Sammlerkanal zugewandte Ende schmiegt sich in bevorzugter Ausbildung zumindest teilweise an den Umfang des Sammlerkanals an.To fix the collector channel on The converter is preferably a connecting sleeve surrounding the guide funnel provided with both the collector channel and the converter is rigidly connected. The use of a connecting sleeve for fixation of the collector channel on the converter instead of fixing it directly is advantageous in that the coupling sleeve is not direct is exposed to the exhaust gas flow. It is therefore inherently one exposed to less material stress than that with the exhaust gas directly in touch coming parts of the exhaust system. In addition, there is the connecting sleeve no leading function for the exhaust gas flow, so that its shape can be selected comparatively freely. In particular, a stress-avoiding shape of the connecting sleeve possible. Is cheap in this context, a design according to which the sleeve on its, the Converter facing end one of the adjacent converter surface approximately has the same cross section. The connecting sleeve goes in this execution quasi steadily in the jacket of the converter, so that particularly sensitive edges or jumps the interface between the coupling sleeve and the converter avoided are. The opposite end and thus facing the collector channel hugs at least partially in the preferred training Scope of the collector channel.
Zweckmäßigerweise ist die Verbindungsmuffe mit dem Sammlerkanal und dem Konverter strömungsdicht verbunden. Die Verbindungsmuffe bildet somit eine zweite Hülle um die Verbindungsstelle zwischen dem Sammlerkanal und dem Konverter, die verhindert, dass in geringem Maße über die flexible Verbindung zwischen dem Sammlerkanal und dem Konverter entweichendes Abgas an die Umwelt gelangen kann.The connecting sleeve is expedient flow-tightly connected to the collector channel and the converter. The connecting sleeve thus forms a second shell around the connection point between the collector channel and the converter, which prevents to a small extent via the flexible connection Exhaust gas escaping between the collector channel and the converter can get to the environment.
Zur konstruktiven Vereinfachung ist bevorzugt vorgesehen, mehrere, von der gleichen Seite an den Konverter angrenzende Leittrichter von einer gemeinsamen Verbindungsmuffe zu umgeben.To simplify construction preferably provided several, from the same side to the converter adjacent guide funnels from a common connecting sleeve to surround.
Die erfindungsgemäße Verbindungstechnik ist besonders geeignet für einen als monolithischen Katalysator ausgebildeten Konverter, der einen metallischen Tragkörper aufweist. Eine Vermischung der Teilströme innerhalb des Katalysators ist zweckmäßigennreise dadurch unterbunden, dass der Konverter eine Vielzahl untereinander unverbundener Reaktionskanäle aufweist.The connection technology according to the invention is special suitable for a converter designed as a monolithic catalyst, the a metallic support body having. A mixture of the partial flows within the catalyst is expedient travel prevented by the fact that the converter a variety among themselves unconnected reaction channels having.
Die beschriebene flexible Verbindung zwischen dem Sammlerkanal und dem Konverter ist vor allem am Einlass des Konverters vorgesehen, zumal hier besonders hohe Temperaturen herrschen. Es ist darüber hinaus vorteilhaft, auch den stromab des Konverters angeordneten Teil des Sammlerkanals in der erfindungsgemäßen Weise axial beweglich mit dem Konverter zu verbinden.The described flexible connection between the collector channel and the converter is mainly at the inlet provided by the converter, especially since particularly high temperatures to rule. It's about it also advantageous, also arranged downstream of the converter Part of the collector channel in the manner according to the invention axially movable with the Connect converter.
Die mit der Erfindung erzielten Vorteile
bestehen insbesondere darin, dass die aus der
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigenAn embodiment of the Invention explained in more detail with reference to a drawing. Show in it
Einander entsprechende Teile sind in den Figuren mit gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference numerals in the figures.
In
In
In
Der Konverter
Zur Fixierung der Sammelkanäle
Über
die Verbindungsmuffe
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE10261880A DE10261880A1 (en) | 2002-12-20 | 2002-12-20 | Exhaust system for motor vehicle internal combustion engine with ends of collector channels axially movable w.r.t flow openings of catalytic converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10261880A DE10261880A1 (en) | 2002-12-20 | 2002-12-20 | Exhaust system for motor vehicle internal combustion engine with ends of collector channels axially movable w.r.t flow openings of catalytic converter |
Publications (1)
Publication Number | Publication Date |
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DE10261880A1 true DE10261880A1 (en) | 2004-07-01 |
Family
ID=32404419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE10261880A Withdrawn DE10261880A1 (en) | 2002-12-20 | 2002-12-20 | Exhaust system for motor vehicle internal combustion engine with ends of collector channels axially movable w.r.t flow openings of catalytic converter |
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DE (1) | DE10261880A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1524031A1 (en) * | 2003-10-17 | 2005-04-20 | Ngk Insulators, Ltd. | Honeycomb structure and catalytic converter |
CN112922706A (en) * | 2021-04-06 | 2021-06-08 | 宜兴市锦龙陶瓷有限公司 | Honeycomb ceramic sintering device for thin-wall diesel engine tail gas purification and use method thereof |
Citations (5)
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DE2725943A1 (en) * | 1977-06-08 | 1978-12-21 | Daimler Benz Ag | Combustion engine exhaust catalyst - has inlet and outlet connections for separate exhaust entry and exit ducts |
DE3738538C2 (en) * | 1987-11-13 | 1996-04-25 | Emitec Emissionstechnologie | Catalytic converter for exhaust gas purification |
DE19711789A1 (en) * | 1997-03-21 | 1998-10-01 | Zeuna Staerker Kg | Manufacture of exhaust gas purification unit containing e.g. catalyst and comprising cylindrical section with double end cone transitions |
JP2001003738A (en) * | 1999-06-22 | 2001-01-09 | Suzuki Motor Corp | Catalyst device |
DE10020492A1 (en) * | 2000-04-26 | 2001-10-31 | Eberspaecher J Gmbh & Co | Exhaust device of an exhaust system, in particular a motor vehicle catalytic converter in modular design |
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2002
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Publication number | Priority date | Publication date | Assignee | Title |
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DE2725943A1 (en) * | 1977-06-08 | 1978-12-21 | Daimler Benz Ag | Combustion engine exhaust catalyst - has inlet and outlet connections for separate exhaust entry and exit ducts |
DE3738538C2 (en) * | 1987-11-13 | 1996-04-25 | Emitec Emissionstechnologie | Catalytic converter for exhaust gas purification |
DE19711789A1 (en) * | 1997-03-21 | 1998-10-01 | Zeuna Staerker Kg | Manufacture of exhaust gas purification unit containing e.g. catalyst and comprising cylindrical section with double end cone transitions |
JP2001003738A (en) * | 1999-06-22 | 2001-01-09 | Suzuki Motor Corp | Catalyst device |
DE10020492A1 (en) * | 2000-04-26 | 2001-10-31 | Eberspaecher J Gmbh & Co | Exhaust device of an exhaust system, in particular a motor vehicle catalytic converter in modular design |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1524031A1 (en) * | 2003-10-17 | 2005-04-20 | Ngk Insulators, Ltd. | Honeycomb structure and catalytic converter |
US7438868B2 (en) | 2003-10-17 | 2008-10-21 | Ngk Insulators, Ltd. | Honeycomb structure and catalytic converter |
CN112922706A (en) * | 2021-04-06 | 2021-06-08 | 宜兴市锦龙陶瓷有限公司 | Honeycomb ceramic sintering device for thin-wall diesel engine tail gas purification and use method thereof |
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