EP0355489A1 - Internal combustion engine multi branch exhaust pipe - Google Patents

Internal combustion engine multi branch exhaust pipe Download PDF

Info

Publication number
EP0355489A1
EP0355489A1 EP89114153A EP89114153A EP0355489A1 EP 0355489 A1 EP0355489 A1 EP 0355489A1 EP 89114153 A EP89114153 A EP 89114153A EP 89114153 A EP89114153 A EP 89114153A EP 0355489 A1 EP0355489 A1 EP 0355489A1
Authority
EP
European Patent Office
Prior art keywords
exhaust pipe
exhaust gas
guide element
combustion engine
internal combustion
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
EP89114153A
Other languages
German (de)
French (fr)
Other versions
EP0355489B1 (en
Inventor
Reinhold Alt
Erhard Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE8810816U external-priority patent/DE8810816U1/de
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0355489A1 publication Critical patent/EP0355489A1/en
Application granted granted Critical
Publication of EP0355489B1 publication Critical patent/EP0355489B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • 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
    • F01N13/009—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 separate purifying devices arranged in series
    • 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F01N2410/02—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of high temperature, e.g. overheating of catalytic reactor

Definitions

  • the invention relates to a branched exhaust pipe of an internal combustion engine according to the preamble of claim 1.
  • Exhaust systems of motor vehicles provided with exhaust gas catalysts have become known, in which there is a relatively small-sized start catalytic converter connected to the exhaust line via a first branch, while a second branch leads directly to a continuous operation designed for a high mass throughput. Catalyst leads.
  • a pivotable flap is arranged in the branching in the known prior art, which, depending on its position, directs the exhaust gas flow into the first or second branch of the exhaust pipe. This arrangement is provided in order to achieve a successful conversion of harmful exhaust gas components as soon as possible after starting the internal combustion engine.
  • the object of the invention is therefore to show an exhaust pipe which is significantly reduced in terms of expenditure and of the type specified in the preamble of the first claim. This object is achieved by the characterizing features of the first claim, advantageous embodiments and further developments describe the subclaims.
  • the guide element is made of a material that deforms under the influence of temperature. By suitable shaping of the guide element it is thus possible to achieve the desired division or guidance in accordance with the shape dependent on the respective exhaust gas temperature.
  • expansion elements known per se can also be used.
  • the guide element can be designed as a bimetal element, which also has a different shape depending on the material temperature and thus also the temperature of the exhaust gas stream. In the sense of an advantageous combination of functions, both the determination of the exhaust gas temperature and the corresponding reaction, namely the desired division or guidance of the exhaust gas flow, are always carried out in the guide element itself. All this also prevents an adjustment force, which is always directly effective and triggered by the high temperature differences The guiding element seizes.
  • FIG. 3 shows the section A-A from FIG. 1.
  • the exhaust gas is discharged into the environment via an exhaust pipe designated in its entirety by 2 and via a continuous operation catalytic converter 3. Since the latter requires a certain minimum temperature for the successful conversion of harmful exhaust gas components, however, due to its large mass, this only takes a certain time after the start of the When the internal combustion engine is reached, a so-called start catalytic converter 4 with a smaller overall volume is additionally provided near the internal combustion engine. However, since this is not able to absorb the entire exhaust gas flow in the already heated state - this would destroy the starting catalytic converter due to high temperature peaks - this starting catalytic converter 4 is arranged in a second line branch 5 of the exhaust line 2, which is below Influence of a guide element 10 can be blocked. In these cases, the exhaust gas flows bypassing the start catalyst 4 via a first bypass line branch 6 directly to the continuous operation catalyst 3.
  • the guide element 10 which carries out the desired division or control of the exhaust gas flow, is generally made of a material deforming under the influence of temperature.
  • this guide element 10 is designed as a bimetal tongue.
  • this bimetallic tongue is connected with its end 11a to a web 12 of the exhaust pipe 2 expanded in the area of the starting catalytic converter.
  • this bimetal tongue is shown in two different positions. In the position shown with solid lines, the guide element 10 closes the bypass line branch 6 and guides the entire exhaust gas flow via the start catalyst 4. In the dash-dotted representation, however, the guide element blocks the second line branch 5, so that the entire exhaust gas flow is via the Bypass line branch 6 reaches catalytic converter 3 for continuous operation. In addition to these two extreme positions, the guide element 10 can of course also assume any intermediate position and, in particular, the exhaust gas flow, as desired divide with its free end 11b quantitatively between the two line branches 5, 6. Due to its bimetallic structure, the guide element 10 essentially assumes the desired position depending on the temperature of the exhaust gas flow.
  • the guide element 10 advantageously represents the wall separating the bypass line branch 6 from the second line branch 5 in the sense of a functional combination. Furthermore, the exhaust line is provided with two extended shoulders 8 which accommodate the free end 11b of the guide element 10 in its two extreme positions are provided. This measure considerably reduces the flow resistance within the exhaust pipe 2.
  • FIG. 2 Another exemplary embodiment is shown in FIG. 2.
  • the two line branches 5, 6 are implemented in separate pipelines.
  • two guide elements 10a, 10b are provided, which in turn are shown in the two possible extreme positions.
  • FIG. 3 shows a preferred measure for improved partitioning of the line branches 5 and 6 to be blocked off by the guide element 10.
  • the exhaust gas line has a cross-section widened within the adjustment range 13 of the guide element 10, which is hatched and shown in broken lines in FIG. 3 on.
  • the guide element 10 bears against the right step 14, as shown, analogous to a labyrinth of seals, there is an improved sealing of the line branch 6 then shut off.
  • This design also advantageously results in improved guidance of the guide element 10.

Abstract

A branched exhaust pipe of an internal-combustion engine (1) has two pipe branches (5, 6), which lead to a primary catalyst (4) and form a bypass to the latter, respectively. The corresponding division of the exhaust gas stream is effected with the aid of bimetal tongues (10a, 10b), which assume the respectively desired position as a function of the temperature of the exhaust gas stream. The primary catalyst (4) is thus only supplied while the exhaust pipe is still cold; overheating of the primary catalyst, which reaches its operating temperature rapidly at low mass flow, is thus excluded due to the automatic blocking of the pipe branch leading to the primary catalyst. <IMAGE>

Description

Die Erfindung betrifft eine verzweigte Abgasleitung einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.
Es sind mit Abgas-Katalysatoren versehene Abgasanlagen von Kraftfahrzeugen bekannt geworden, bei welchen sich stromab der Verzweigung ein über einen ersten Zweig mit der Abgasleitung verbundener, relativ kleindimensionier­ter Start-Katalysator befindet, während ein zweiter Zweig direkt zu einem für einen hohen Massendurchsatz ausgelegten Dauerbetriebs-Katalysator führt. Ferner ist beim bekannten Stand der Technik im Bereich der Ver­zweigung eine schwenkbare Klappe angeordnet, welche in Abhängigkeit von ihrer Stellung den Abgasstrom in den ersten bzw. zweiten Zweig der Abgasleitung lenkt. Vorgesehen ist diese Anordnung, um nach einem Start der Brennkraftmaschine möglichst kurzfristig eine erfolg­reiche Konvertierung schädlicher Abgasbestandteile zu erzielen. Da Katalysatoren zur Ausübung ihrer Funktion eine gewisse Minimaltemperatur aufweisen müssen, wird zunächst das gesamte Abgas über den Start-Katalysator geleitet, welcher sich aufgrund seines geringeren Bauvolumens deutlich schneller erwärmt als der wesent­lich großvolumigere Dauerbetriebs-Katalysator. Um jedoch im Dauerbetrieb eine Überhitzung des Start-Katalysators zu vermeiden, wird durch Umlegen der Klappe der dann zumeist auch größere Abgasmassenstrom unter Umgehung des Start-Katalysators direkt dem stromab der Zusammenfüh­rung beider Leitungszweige angeordnetem Dauerbetriebs-­Katalysator zugeführt.The invention relates to a branched exhaust pipe of an internal combustion engine according to the preamble of claim 1.
Exhaust systems of motor vehicles provided with exhaust gas catalysts have become known, in which there is a relatively small-sized start catalytic converter connected to the exhaust line via a first branch, while a second branch leads directly to a continuous operation designed for a high mass throughput. Catalyst leads. Furthermore, a pivotable flap is arranged in the branching in the known prior art, which, depending on its position, directs the exhaust gas flow into the first or second branch of the exhaust pipe. This arrangement is provided in order to achieve a successful conversion of harmful exhaust gas components as soon as possible after starting the internal combustion engine. Since catalytic converters must have a certain minimum temperature in order to perform their function, the entire exhaust gas is first passed through the start catalytic converter, which heats up significantly faster than the much larger-volume continuous catalytic converter due to its smaller construction volume. However, in order to avoid overheating of the start catalytic converter in continuous operation, the flap is turned over usually larger exhaust gas mass flow bypassing the start catalyst is fed directly to the continuous operation catalyst arranged downstream of the junction of the two line branches.

Funktional haben sich derartige verzweigte Abgasleitun­gen zwar bewährt, in der technischen Ausführung können sich jedoch Probleme ergeben. So läßt sich oftmals ein Festfressen der Klappe in einer der beiden Klappen­stellungen trotz aufwendigster Lagerung und Führung aufgrund der teilweise aggressiven Abgasbestandteile nicht vermeiden. Auch ist der Ansteuerungsmechanismus für eine derartige Klappe äußerst aufwendig.
So beschreibt beispielsweise die gattungsbildende DE-OS 22 50 898 eine derartige Drehklappe, welche sich nicht nur durch den bei größerem Gasdurchsatz höheren Strö­mungsdruck selbsttätig öffnet, sondern darüber hinaus bei höherer Temperatur unter Einfluß einer Bimetallfeder den zweiten Bypass-Leitungszweig freigibt. Die mecha­nischen Klappen-Probleme treten jedoch auch hierbei auf.Such branched exhaust pipes have proven themselves functionally, but problems can arise in the technical implementation. Thus, seizing of the flap in one of the two flap positions cannot be avoided despite the most complex storage and guidance due to the sometimes aggressive exhaust gas components. The control mechanism for such a flap is extremely complex.
For example, the generic DE-OS 22 50 898 describes such a rotary flap, which not only opens automatically due to the higher flow pressure at higher gas throughput, but also releases the second bypass line branch at a higher temperature under the influence of a bimetal spring. However, the mechanical flap problems also occur here.

Aufgabe der Erfindung ist es daher, eine im Aufwand deutlich reduzierte Abgasleitung der im Oberbegriff des ersten Anspruchs angegebenen Art aufzuzeigen.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des ersten Anspruchs gelöst, vorteilhafte Aus- und Weiterbildungen beschreiben die Unteransprüche.The object of the invention is therefore to show an exhaust pipe which is significantly reduced in terms of expenditure and of the type specified in the preamble of the first claim.
This object is achieved by the characterizing features of the first claim, advantageous embodiments and further developments describe the subclaims.

Erfindungsgemäß ist das Leitelement aus einem sich unter Temperatureinfluß verformenden Material gefertigt. Durch geeignete Formgebung des Leitelementes ist es somit möglich, die gewünschte Aufteilung bzw. Führung ent­sprechend der von der jeweiligen Abgastemperatur ab­hängigen Form zu erzielen. Neben der Verwendung von Memory-Legierungen können auch an sich bekannte Dehn­stoff-Elemente zum Einsatz kommen. Gemäß Anspruch 2 kann darüber hinaus das Leitelement als Bimetall-Element ausgebildet sein, welches ebenfalls in Abhängigkeit von der Materialtemperatur und somit auch der Temperatur des Abgasstromes eine verschiedenartige Form aufweist. Im Sinne einer vorteilhaften Funktionsvereinigung erfolgt dabei sowohl die Ermittlung der Abgastemperatur als auch die entsprechende Reaktion, nämlich die gewünschte Aufteilung bzw. Führung des Abgasstromes, stets im Leitelement selbst. All dies verhindert aufgrund der stets direkt einwirkenden, durch die hohen Temperatur­unterschiede ausgelösten Verstellkräfte auch ein Fest­fressen des Leitelementes.According to the invention, the guide element is made of a material that deforms under the influence of temperature. By suitable shaping of the guide element it is thus possible to achieve the desired division or guidance in accordance with the shape dependent on the respective exhaust gas temperature. In addition to the use of memory alloys, expansion elements known per se can also be used. According to claim 2 can In addition, the guide element can be designed as a bimetal element, which also has a different shape depending on the material temperature and thus also the temperature of the exhaust gas stream. In the sense of an advantageous combination of functions, both the determination of the exhaust gas temperature and the corresponding reaction, namely the desired division or guidance of the exhaust gas flow, are always carried out in the guide element itself. All this also prevents an adjustment force, which is always directly effective and triggered by the high temperature differences The guiding element seizes.

Eine besonders vorteilhafte, da konstruktiv einfache Ausbildung des Leitelementes beschreibt der dritte Anspruch, wobei insbesondere in Fällen, in denen der mit nur einem einzigen Bimetall-Leitelement realisierbare Verstellweg nicht ausreichend ist, gemäß Anspruch 4 auch mehrere solcher Leitelemente vorgesehen sein können. Die Merkmale des Anspruchs 5 schließlich bewirken eine verbesserte Abschottung des jeweils zu verschließenden Leitungszweiges, da in den jeweils verschließenden Positionen das Leitelement an den Stufen bzw. Absätzen, die sich aus der stufenförmigen Erweiterung der Quer­schnittsfläche ergeben, anliegt.A particularly advantageous, since structurally simple design of the guide element describes the third claim, and in particular in cases in which the adjustment path that can be realized with only a single bimetal guide element is not sufficient, several such guide elements can also be provided according to claim 4. Finally, the features of claim 5 bring about an improved partitioning of the line branch to be closed, since in the respective closing positions the guide element bears against the steps or shoulders which result from the step-like expansion of the cross-sectional area.

Die Fig. 1 und 2 zeigen bevorzugte Ausführungsbeispiele der Erfindung. Fig. 3 zeigt den Schnitt A-A aus Fig. 1.1 and 2 show preferred embodiments of the invention. FIG. 3 shows the section A-A from FIG. 1.

Von einer Brennkraftmaschine 1 wird das Abgas über eine in ihrer Gesamtheit mit 2 bezeichnete Abgasleitung sowie über einen Dauerbetriebs-Katalysator 3 in die Umgebung abgeführt. Da letzterer für eine erfolgreiche Konver­tierung schädlicher Abgasbestandteile eine gewisse Minimaltemperatur benötigt, diese jedoch aufgrund seiner großen Masse erst eine gewisse Zeit nach einem Start der Brennkraftmaschine erreicht, ist zusätzlich nahe der Brennkraftmaschine ein sog. Start-Katalysator 4 mit geringerem Bauvolumen vorgesehen. Da dieser jedoch nicht in der Lage ist, im bereits erwärmten Zustand den gesamten anfallenden Abgasstrom aufzunehmen - hierdurch würde der Start-Katalysator aufgrund hoher Temperatur­spitzen zerstört werden -, ist dieser Start-Katalysator 4 in einem zweiten Leitungszweig 5 der Abgasleitung 2 angeordnet, welcher unter Einfluß eines Leitelementes 10 abgesperrt werden kann. In diesen Fällen strömt das Abgas unter Umgehung des Start-Katalysators 4 über einen ersten Bypass-Leitungszweig 6 direkt zum Dauerbetriebs-­Katalysator 3.From an internal combustion engine 1, the exhaust gas is discharged into the environment via an exhaust pipe designated in its entirety by 2 and via a continuous operation catalytic converter 3. Since the latter requires a certain minimum temperature for the successful conversion of harmful exhaust gas components, however, due to its large mass, this only takes a certain time after the start of the When the internal combustion engine is reached, a so-called start catalytic converter 4 with a smaller overall volume is additionally provided near the internal combustion engine. However, since this is not able to absorb the entire exhaust gas flow in the already heated state - this would destroy the starting catalytic converter due to high temperature peaks - this starting catalytic converter 4 is arranged in a second line branch 5 of the exhaust line 2, which is below Influence of a guide element 10 can be blocked. In these cases, the exhaust gas flows bypassing the start catalyst 4 via a first bypass line branch 6 directly to the continuous operation catalyst 3.

Erfindungsgemäß ist das Leitelement 10, welches die gewünschte Aufteilung bzw. Lenkung des Abgasstromes vornimmt, allgemein aus einem sich unter Temperatur­einfluß verformenden Material gefertigt. Insbesondere ist dieses Leitelement 10 als Bimetall-Zunge ausgebil­det.According to the invention, the guide element 10, which carries out the desired division or control of the exhaust gas flow, is generally made of a material deforming under the influence of temperature. In particular, this guide element 10 is designed as a bimetal tongue.

Nach Fig. 1 ist diese Bimetall-Zunge mit ihrem Ende 11a an einem Steg 12 der im Bereich des Start-Katalysators erweiterten Abgasleitung 2 angebunden. Zum besseren Verständnis ist diese Bimetall-Zunge in zwei verschie­denen Positionen gezeigt. In der mit durchgezogenen Linien dargestellten Position verschließt das Leitele­ment 10 den Bypass-Leitungszweig 6 und führt den ge­samten Abgasstrom über den Start-Katalysator 4. In der strich-punktierten Darstellung hingegen sperrt das Leitelement den zweiten Leitungszweig 5, so daß der gesamte Abgasstrom über den Bypass-Leitungszweig 6 zum Dauerbetriebs-Katalysator 3 gelangt. Neben diesen beiden Extremstellungen kann das Leitelement 10 selbstver­ständlich auch jegliche Zwischenstellung einnehmen und dabei den Abgasstrom - wie gewünscht - insbesondere mit ihrem freien Ende 11b quantitätsmäßig auf die beiden Leitungszweige 5, 6 aufteilen. Aufgrund seines Bime­tall-Aufbaus nimmt dabei das Leitelement 10 im wesent­lichen in Abhängigkeit von der Temperatur des Abgas­stromes die jeweils gewünschte Position ein.According to FIG. 1, this bimetallic tongue is connected with its end 11a to a web 12 of the exhaust pipe 2 expanded in the area of the starting catalytic converter. For better understanding, this bimetal tongue is shown in two different positions. In the position shown with solid lines, the guide element 10 closes the bypass line branch 6 and guides the entire exhaust gas flow via the start catalyst 4. In the dash-dotted representation, however, the guide element blocks the second line branch 5, so that the entire exhaust gas flow is via the Bypass line branch 6 reaches catalytic converter 3 for continuous operation. In addition to these two extreme positions, the guide element 10 can of course also assume any intermediate position and, in particular, the exhaust gas flow, as desired divide with its free end 11b quantitatively between the two line branches 5, 6. Due to its bimetallic structure, the guide element 10 essentially assumes the desired position depending on the temperature of the exhaust gas flow.

Bei dieser Ausbildung stellt das Leitelement 10 im Sinne einer Funktionsvereinigung vorteilhafterweise zugleich die den Bypass-Leitungszweig 6 vom zweiten Leitungszweig 5 abtrennende Wand dar. Ferner ist die Abgasleitung mit zwei erweiterten Absätzen 8 versehen, welche zur Auf­nahme des freien Endes 11b des Leitelementes 10 in seinen beiden Extrempositionen vorgesehen sind. Diese Maßnahme reduziert den Strömungswiderstand innerhalb der Abgasleitung 2 erheblich.In this embodiment, the guide element 10 advantageously represents the wall separating the bypass line branch 6 from the second line branch 5 in the sense of a functional combination. Furthermore, the exhaust line is provided with two extended shoulders 8 which accommodate the free end 11b of the guide element 10 in its two extreme positions are provided. This measure considerably reduces the flow resistance within the exhaust pipe 2.

Ein weiteres Ausführungsbeispiel zeigt Fig. 2. Hier sind die beiden Leitungszweige 5, 6 in getrennten Rohrlei­tungen ausgeführt. Im Bereich der Verzweigung 7 sind zwei Leitelemente 10a, 10b vorgesehen, welche wiederum in den beiden möglichen Extrempositionen dargestellt sind. Mit einer derartigen Anordnung lassen sich also auch größere Verstellwege mit Hilfe technisch einfach realisierbarer zungenförmiger Leitelemente realisieren.Another exemplary embodiment is shown in FIG. 2. Here, the two line branches 5, 6 are implemented in separate pipelines. In the region of the branch 7, two guide elements 10a, 10b are provided, which in turn are shown in the two possible extreme positions. With such an arrangement, even larger adjustment paths can be realized with the aid of tongue-shaped guide elements that are technically simple to implement.

Fig. 3 zeigt eine bevorzugte Maßnahme zur verbesserten Abschottung des jeweils durch das Leitelement 10 abzu­sperrenden Leitungszweiges 5 bzw. 6. Hierzu weist die Abgasleitung innerhalb des in Fig. 1 schraffiert und in Fig. 3 strichliert dargestellten Verstellbereiches 13 des Leitelementes 10 einen stufenförmig erweiterten Querschnitt auf. Liegt somit das Leitelement 10 - wie gezeigt - an der rechten Stufe 14 an, so ergibt sich analog einem Dichtungslabyrinth eine verbesserte Ab­dichtung des dann abgesperrten Leitungszweiges 6. Vorteilhafterweise ergibt sich mit dieser Gestaltung auch eine verbesserte Führung des Leitelementes 10.FIG. 3 shows a preferred measure for improved partitioning of the line branches 5 and 6 to be blocked off by the guide element 10. For this purpose, the exhaust gas line has a cross-section widened within the adjustment range 13 of the guide element 10, which is hatched and shown in broken lines in FIG. 3 on. Thus, if the guide element 10 bears against the right step 14, as shown, analogous to a labyrinth of seals, there is an improved sealing of the line branch 6 then shut off. This design also advantageously results in improved guidance of the guide element 10.

Claims (5)

1. Verzweigte Abgasleitung einer Brennkraftmaschine mit einem Leitelement zur temperaturabhängigen Aufteilung des Abgasstromes auf einen Leitungszweig mit einem Katalysator sowie auf einen Bypass-Lei­tungszweig,
dadurch gekennzeichnet, daß das Leitelement aus einem sich unter Temperatureinfluß verformenden Material gefertigt ist und in Abhängigkeit von der jeweiligen Form die gewünschte Aufteilung des Abgasstromes vornimmt.1. Branched exhaust pipe of an internal combustion engine with a guide element for the temperature-dependent distribution of the exhaust gas flow over a line branch with a catalyst and a bypass line branch,
characterized in that the guide element is made of a material deforming under the influence of temperature and, depending on the particular shape, carries out the desired division of the exhaust gas flow. 2. Verzweigte Abgasleitung mit einem durch ein Bi­metall-Element gesteuerten Leitelement nach An­spruch 1,
dadurch gekennzeichnet, daß das Leitelement (10) durch das Bimetall-Element gebildet ist.2. A branched exhaust pipe with a control element controlled by a bimetal element according to claim 1.
characterized in that the guide element (10) is formed by the bimetal element. 3. Abgasleitung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das zungenförmig ausgebildete Leitelement mit einem Ende (11a) fest angebunden ist und im wesentlichen mit seinem freien Ende (11b) den Abgasstrom führt und/oder aufteilt.3. exhaust pipe according to claim 1 or 2,
characterized in that the tongue-shaped guide element is firmly connected at one end (11a) and essentially guides and / or divides the exhaust gas flow with its free end (11b). 4. Abgasleitung nach einem der vorangegangenen An­sprüche,
dadurch gekennzeichnet, daß im Bereich einer Leitungs-Verzweigung (7) mehrere Leitelemente (10a, 10b) vorgesehen sind.4. Exhaust pipe according to one of the preceding claims,
characterized in that a plurality of guide elements (10a, 10b) are provided in the region of a line branch (7). 5. Abgasleitung nach einem der vorangegangenen An­sprüche,
gekennzeichnet durch eine im Verstellbereich (13) des Leitelementes (10) stufenförmig erweiterte Querschnittsfläche.5. Exhaust pipe according to one of the preceding claims,
characterized by a cross-sectional area which is widened in steps in the adjustment region (13) of the guide element (10).
EP89114153A 1988-08-26 1989-08-01 Internal combustion engine multi branch exhaust pipe Expired - Lifetime EP0355489B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8810816U 1988-08-26
DE8810816U DE8810816U1 (en) 1988-08-26 1988-08-26
DE3832509 1988-09-24
DE3832509 1988-09-24

Publications (2)

Publication Number Publication Date
EP0355489A1 true EP0355489A1 (en) 1990-02-28
EP0355489B1 EP0355489B1 (en) 1992-03-04

Family

ID=25872558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114153A Expired - Lifetime EP0355489B1 (en) 1988-08-26 1989-08-01 Internal combustion engine multi branch exhaust pipe

Country Status (2)

Country Link
EP (1) EP0355489B1 (en)
DE (1) DE58900911D1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378797A1 (en) * 1988-12-20 1990-07-25 Emitec Gesellschaft für Emissionstechnologie mbH Bimetallic flow guide shutter, especially for the exhaust systems of motor vehicles
EP0465183A1 (en) * 1990-06-29 1992-01-08 Ngk Insulators, Ltd. Catalytic converter with resistance heater
US5200154A (en) * 1990-07-06 1993-04-06 Ngk Insulators, Ltd. Honeycomb heater having integrally formed electrodes and/or integrally sintered electrodes and method of manufacturing such honeycomb heater
US5204066A (en) * 1990-07-04 1993-04-20 Ngk Insulators, Ltd. Method of operating catalytic converter
US5229079A (en) * 1990-06-29 1993-07-20 Ngk Insulators, Ltd. Catalytic converter for use in automotive exhaust emission control
US5229080A (en) * 1990-06-29 1993-07-20 Ngk Insulators, Ltd. Resistance adjusting type heater and catalytic converter
US5234668A (en) * 1990-07-25 1993-08-10 Ngk Insulators, Ltd. Catalytic converter for use in automotive exhaust emissions control
DE4218834A1 (en) * 1992-06-09 1993-12-16 Opel Adam Ag Exhaust system for vehicle IC engine - uses catalytic converter fed by two pipes of different cross=sections
US5318757A (en) * 1990-12-21 1994-06-07 Ngk Insulators, Ltd. Honeycomb heater and catalytic converter
DE4311574A1 (en) * 1993-04-08 1995-02-16 Duerrwaechter E Dr Doduco Temperature-controlled exhaust gas shut-off valve for internal combustion engines in motor vehicles
EP0563882B1 (en) * 1992-03-30 1997-09-10 Yamaha Hatsudoki Kabushiki Kaisha Method for catalytically cleaning the exhaust gas of an internal combustion engine and exhaust gas system
DE19742762C1 (en) * 1997-09-27 1998-12-10 Ford Global Tech Inc Exhaust gas system for internal combustion engine
EP1188909A2 (en) * 2000-09-15 2002-03-20 FERRARI S.p.A. Internal combustion engine exhaust device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343468B4 (en) * 2003-09-19 2010-07-08 Audi Ag Exhaust gas cooler for an exhaust system of an internal combustion engine of a vehicle, in particular of a motor vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1451881A1 (en) * 1963-09-07 1969-01-23 Daimler Benz Ag Device for the catalytic post-combustion of exhaust gases from an internal combustion engine, in particular in motor vehicles
US3817031A (en) * 1972-05-09 1974-06-18 Toyota Motor Co Ltd Overheat protection for catalyst converter
AT316934B (en) * 1972-02-10 1974-08-12 Johann Endholzer Device for guiding the exhaust gases from internal combustion engines
DE2420678A1 (en) * 1974-04-29 1975-11-06 Daimler Benz Ag Catalytic reactor system - for internal combustion engine with start-up and main reactors
US3963447A (en) * 1971-07-20 1976-06-15 Nissan Motor Co., Ltd. Catalytic reactor for exhaust gases

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1451881A1 (en) * 1963-09-07 1969-01-23 Daimler Benz Ag Device for the catalytic post-combustion of exhaust gases from an internal combustion engine, in particular in motor vehicles
US3963447A (en) * 1971-07-20 1976-06-15 Nissan Motor Co., Ltd. Catalytic reactor for exhaust gases
AT316934B (en) * 1972-02-10 1974-08-12 Johann Endholzer Device for guiding the exhaust gases from internal combustion engines
US3817031A (en) * 1972-05-09 1974-06-18 Toyota Motor Co Ltd Overheat protection for catalyst converter
DE2420678A1 (en) * 1974-04-29 1975-11-06 Daimler Benz Ag Catalytic reactor system - for internal combustion engine with start-up and main reactors

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378797A1 (en) * 1988-12-20 1990-07-25 Emitec Gesellschaft für Emissionstechnologie mbH Bimetallic flow guide shutter, especially for the exhaust systems of motor vehicles
US5229079A (en) * 1990-06-29 1993-07-20 Ngk Insulators, Ltd. Catalytic converter for use in automotive exhaust emission control
EP0465183A1 (en) * 1990-06-29 1992-01-08 Ngk Insulators, Ltd. Catalytic converter with resistance heater
US5229080A (en) * 1990-06-29 1993-07-20 Ngk Insulators, Ltd. Resistance adjusting type heater and catalytic converter
US5286460A (en) * 1990-07-04 1994-02-15 Ngk Insulators, Ltd. Method of operating catalytic converter
US5204066A (en) * 1990-07-04 1993-04-20 Ngk Insulators, Ltd. Method of operating catalytic converter
US5200154A (en) * 1990-07-06 1993-04-06 Ngk Insulators, Ltd. Honeycomb heater having integrally formed electrodes and/or integrally sintered electrodes and method of manufacturing such honeycomb heater
US5234668A (en) * 1990-07-25 1993-08-10 Ngk Insulators, Ltd. Catalytic converter for use in automotive exhaust emissions control
US5318757A (en) * 1990-12-21 1994-06-07 Ngk Insulators, Ltd. Honeycomb heater and catalytic converter
EP0563882B1 (en) * 1992-03-30 1997-09-10 Yamaha Hatsudoki Kabushiki Kaisha Method for catalytically cleaning the exhaust gas of an internal combustion engine and exhaust gas system
DE4218834A1 (en) * 1992-06-09 1993-12-16 Opel Adam Ag Exhaust system for vehicle IC engine - uses catalytic converter fed by two pipes of different cross=sections
DE4311574A1 (en) * 1993-04-08 1995-02-16 Duerrwaechter E Dr Doduco Temperature-controlled exhaust gas shut-off valve for internal combustion engines in motor vehicles
DE19742762C1 (en) * 1997-09-27 1998-12-10 Ford Global Tech Inc Exhaust gas system for internal combustion engine
EP0905355A2 (en) 1997-09-27 1999-03-31 Ford Global Technologies, Inc. Exhaust apparatus for an internal combustion engine
EP1188909A2 (en) * 2000-09-15 2002-03-20 FERRARI S.p.A. Internal combustion engine exhaust device
EP1188909A3 (en) * 2000-09-15 2003-06-04 FERRARI S.p.A. Internal combustion engine exhaust device

Also Published As

Publication number Publication date
DE58900911D1 (en) 1992-04-09
EP0355489B1 (en) 1992-03-04

Similar Documents

Publication Publication Date Title
EP0355489B1 (en) Internal combustion engine multi branch exhaust pipe
EP1747369B1 (en) Controllable two-way valve
WO1990002250A1 (en) By-passable catalyzer, in particular disconnectable starting catalyzer
EP2206898B1 (en) Method for treating an exhaust gas flow of a multi-cylinder combustion engine of a vehicle and exhaust gas treatment device
EP0432483B1 (en) Catalytic converter arrangement for purification of exhaust gases
DE2012527A1 (en) Valve for controlling high-pressure steam to be supplied to steam turbines
DE102008052757B4 (en) Device for introducing a liquid into an exhaust gas flow
DE4218834C2 (en) Exhaust system for an internal combustion engine
DE10104021B4 (en) exhaust system
DE2701840A1 (en) TEMPERATURE-SENSITIVE BY-PASS VALVE
EP2211048B1 (en) Exhaust gas flap device and exhaust gas heat recovery system of a combustion engine
EP3346103B1 (en) Exhaust gas system
DE19507961A1 (en) Internal combustion engine with an exhaust gas turbocharger
EP0580931A1 (en) Internal combustion engine with bypassable start-up catalyst
EP1312789B1 (en) Dual source fuel injector
DE102012202390A1 (en) Heat exchanger device i.e. exhaust gas heat exchanger device, for exhaust system of combustion engine in motor car, has heat exchanger channel enclosing bypass channel, and heat exchanger arranged helically around bypass channel
DE4414904C1 (en) Temperature-controlled exhaust catalytic converter system for an internal combustion engine
DE10228619B4 (en) Exhaust pipe for the exhaust system of a motor vehicle
DE7635516U1 (en) AIR FILTER
DE3826364A1 (en) Branched exhaust line of an internal combustion engine
DE19934667B4 (en) Liquid-cooled internal combustion engine
EP1927746B1 (en) Exhaust control device for an internal combustion engine
EP3467363B1 (en) Valve assembly and sanitary station
DE102016014718A1 (en) Valve module for an oil circuit of an internal combustion engine
DE102005043130A1 (en) Internal combustion engine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19900329

17Q First examination report despatched

Effective date: 19910411

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 58900911

Country of ref document: DE

Date of ref document: 19920409

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 89114153.3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000727

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000731

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000830

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000927

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010802

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010801

EUG Se: european patent has lapsed

Ref document number: 89114153.3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050801