DE4205328A1 - Exhaust system for vehicle incorporating converter - has U=shaped gas feed tube and cooling air supply - Google Patents
Exhaust system for vehicle incorporating converter - has U=shaped gas feed tube and cooling air supplyInfo
- Publication number
- DE4205328A1 DE4205328A1 DE4205328A DE4205328A DE4205328A1 DE 4205328 A1 DE4205328 A1 DE 4205328A1 DE 4205328 A DE4205328 A DE 4205328A DE 4205328 A DE4205328 A DE 4205328A DE 4205328 A1 DE4205328 A1 DE 4205328A1
- Authority
- DE
- Germany
- Prior art keywords
- converter
- exhaust gas
- exhaust
- pipe
- exhaust system
- 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.)
- Withdrawn
Links
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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2046—Periodically cooling catalytic reactors
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
-
- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or 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
- 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
- F01N3/2889—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with heat exchangers in a single 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
- F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
-
- 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
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
Die Erfindung betrifft eine Abgasanlage gemäß dem Oberbegriff des Patentan spruchs 1.The invention relates to an exhaust system according to the preamble of the patent saying 1.
Eine derartige Abgasanlage, wie sie aus der DE-OS 22 22 498, FO1N 3/10, bekannt ist, berücksichtigt die Tatsache, daß der Abgaskonverter einerseits zur Entfal tung seiner vollen Wirksamkeit eine bestimmte Mindesttemperatur besitzen muß, andererseits aber insbesondere im Vollastbetrieb der Brennkraftmaschine vor dem Auftreten zu hoher Temperaturen geschützt werden muß. Aus diesem Grunde sind bei der bekannten Konstruktion Abgaskonverter und zumindest ein Teil seines Vor rohres in einem mit einer derart ausgeführten Kühlluftzufuhr versehenen Behälter angeordnet, daß bei niedrigen Konvertertemperaturen die Kühlluftzufuhr unterbro chen ist, so daß die Lufthülle zwischen Konverter und Behälter gleichsam eine Wärmeisolierung für diesen bildet, während bei hohen Konvertertemperaturen die Kühlluftzufuhr wirksam ist, beispielsweise in Gestalt einer geöffneten Klappe, so daß jetzt die Zwischenräume zwischen Konvertergehäuse und Behälter von küh lender Luft durchströmt sind. Diese Durchströmung wird entweder bei einer Fahr zeug-Brennkraftmaschine durch den Fahrtwind oder durch ein Gebläse erzeugt, das entweder das übliche Kühlergebläse der Maschine ist oder durch ein zusätzliches Gebläse gebildet wird (DE-OS 23 05 377, FO1N 3/04).Such an exhaust system, as known from DE-OS 22 22 498, FO1N 3/10 is takes into account the fact that the exhaust gas converter on the one hand is canceled its full effectiveness must have a certain minimum temperature, on the other hand, however, especially in full load operation of the internal combustion engine before Occurrence of high temperatures must be protected. For this reason in the known construction exhaust gas converter and at least part of its front tubes in a container provided with a cooling air supply of this type arranged that the cooling air supply is interrupted at low converter temperatures Chen is, so that the air envelope between converter and container as it were Thermal insulation for this forms, while at high converter temperatures Cooling air supply is effective, for example in the form of an open flap, so that the gaps between the converter housing and the container are now cool air is flowing through. This flow is either when driving convincing internal combustion engine generated by the airstream or by a fan that is either the machine's usual radiator fan or an additional one Fan is formed (DE-OS 23 05 377, FO1N 3/04).
Während bei dem bisher beschriebenen Stand der Technik das sich zwischen dem Aus gang der Brennkraftmaschine und dem Eingang des Abgaskonverters erstreckende Vor rohr unmittelbar in das der Brennkraftmaschine zugekehrte Konverterende einmündet, so daß das Vorrohr seine minimale Länge besitzt, beschreibt die DE-OS 37 13 964, FO1N 3/28, eine Konverterkonstruktion, in der das Vorrohr innerhalb des Konver tergehäuses zu einer in diesem auf der der Brennkraftmaschine abgekehrten Seite vorgesehenen Eintrittskammer verläuft, von wo das Abgas in Gegenströmrichtung den eigentlichen Konverter in Richtung auf eine Kammer am maschinenseitigen Ende durchströmt, von dem das Abgas mittels eines ebenfalls innerhalb des Konverterge häuses verlaufenden Auslaßrohres abgeleitet wird. Die besonderen Vorteile dieser Anordnung sind darin zu sehen, daß durch das relativ lange Vorrohr die Leistungs charakteristik der Brennkraftmaschine günstig beeinflußt sowie durch Anordnung dieses Vorrohres innerhalb des Konverters eine schnelle Aufheizung desselben auf seine Arbeitstemperatur sichergestellt wird. Der grundlegende Nachteil dieser Konstruktion ist darin zu sehen, daß sie die Gefahr einer Überhitzung des Kon vertermaterials nach dem Warmlauf der Brennkraftmaschine nicht berücksichtigt.While in the prior art described so far between the off gear of the internal combustion engine and the input of the exhaust gas converter extending before pipe opens directly into the converter end facing the internal combustion engine, so that the front pipe has its minimum length, describes DE-OS 37 13 964, FO1N 3/28, a converter construction, in which the front pipe inside the converter tergehäuses to a in this on the side facing away from the internal combustion engine provided inlet chamber runs from where the exhaust gas in the counterflow direction the actual converter towards a chamber at the machine end flows through, of which the exhaust gas by means of a likewise within the converter house extending outlet pipe is derived. The special advantages of this Arrangement can be seen in the fact that through the relatively long front pipe, the performance Characteristic of the internal combustion engine favorably influenced and by arrangement this forward pipe within the converter to rapidly heat it up its working temperature is ensured. The basic disadvantage of this Construction can be seen in the risk of overheating the con material after warming up the internal combustion engine is not taken into account.
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Abgasanlage unter Wahrung ihrer grundlegenden Vorteile - schnelle Aufheizung des Konverters und Schutz desselben vor Übertemperaturen - zu schaffen, die hinsichtlich der Schnel ligkeit der Temperaturregelung gegenüber dem eingangs diskutierten Stand der Technik verbessert ist.The invention has for its object a generic exhaust system under Maintaining their basic advantages - quick heating of the converter and Protection of the same from overtemperature - to create that regarding the Schnel temperature control compared to the state of the Technology is improved.
Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merk malen des Hauptanspruchs, vorteilhafte Ausbildungen der Erfindung beschreiben die Unteransprüche.The achievement of this task consists in the characterizing note paint the main claim, describe advantageous embodiments of the invention the subclaims.
Die Erfindung erschöpft sich also nicht in der Übernahme der aus der DE-OS 37 13 964 bekannten Konstruktion mit in das Konvertergehäuse integriertem langen Vor rohr, sondern ordnet dieses bewußt außerhalb des Konvertergehäuses, aber inner halb des Behälters und damit in dem Zwischenraum zwischen beiden an, der bei höheren Abgastemperaturen von Kühlluft durchströmt ist. Bereits jetzt sei be merkt, daß die Steuerung (z. B. durch eine mittels eines temperaturempfindlichen Elements betätigte Klappe) und Erzeugung der Kühlluftströmung (letzteres durch Staudruck oder ein Gebläse) durch an sich bekannte und bewährte Maßnahmen er folgen können.The invention is therefore not limited to the adoption of DE-OS 37 13 964 known construction with a long front integrated into the converter housing tube, but deliberately arranges this outside the converter housing, but inside half of the container and thus in the space between the two at higher exhaust gas temperatures are flowed through by cooling air. Already be notices that the control (e.g. by means of a temperature sensitive Elements operated flap) and generation of the cooling air flow (the latter by Dynamic pressure or a blower) by known and proven measures can follow.
Während des Warmlaufs der Brennkraftmaschine wird durch Anordnung des langen Vorrohres innerhalb des Behälters eine schnelle Aufheizung der unmittelbaren Umgebung des Konvertergehäuses und damit des Konvertermaterials sichergestellt. Während des Kühlungsbetriebs, d. h. bei von Kühlluft durchströmtem Zwischenraum zwischen Konvertergehäuse und Behälter, erfolgt am Vorrohr bereits eine Kühlung des Abgases, bevor es in das Konvertergehäuse gelangt.During the warm-up of the internal combustion engine is arranged by the long Vorrohres within the container rapid heating of the immediate Ensured environment of the converter housing and thus the converter material. During cooling operation, i.e. H. with a space through which cooling air flows between the converter housing and the container, there is already cooling on the down tube of the exhaust gas before it gets into the converter housing.
Wie noch zu erläutern ist, bietet die Erfindung gegenüber der Konstruktion nach der DE-OS 37 13 964 infolge Lage des Vorrohrs außerhalb des Konvertergehäuses große Freiheit hinsichtlich des Verlaufs und der Länge des Vorrohres und damit die Möglichkeit einer guten Anpassung an die jeweiligen Erfordernisse der Brenn kraftmaschine.As is yet to be explained, the invention offers more than the construction DE-OS 37 13 964 due to the position of the front pipe outside the converter housing great freedom with regard to the course and length of the front tube and thus the possibility of a good adaptation to the particular needs of the distillery engine.
Mehrere Ausführungsbeispiele der Erfindung werden im folgenden anhand der Zeich nung erläutert, deren Fig. 1 einen Längsschnitt durch die Abgasanlage und de ren Fig. 2, 3 und 4 Querschnittsansichten gemäß II-II bei verschiedenen Aus führungen des Vorrohres wiedergeben.Several embodiments of the invention are explained below with reference to the undersigned voltage, Fig. 1 show a longitudinal section through the exhaust system and de ren Fig. 2, 3 and 4 cross-sectional views according to II-II in various implementations of the downpipe.
Betrachtet man zunächst die unmittelbar zusammenhängenden Fig. 1 und 2, so besitzt die allgemein mit 1 bezeichnete, im einzelnen nicht interessierende Brennkraftmaschine zwei Abgassysteme 2 und 3, die ein demgemäß zweiflutiges Vor rohr 4 speisen; die Trennwand zwischen den beiden Strängen ist bei 5 angedeutet. Dieses Vorrohr 4 umschließt den Abgaskonverter 6 mit seinem Gehäuse 7 etwa U-för mig, so daß sich ein langes Vorrohr ergibt, das in das der Brennkraftmaschine 1 zugekehrte Ende 8 des Konvertergehäuses 6 einmündet. Ein derart lang ausgeführ tes Vorrohr verhält sich günstig hinsichtlich der Leistungscharakteristik der Brennkraftmaschine 1. . Looking first at the immediately contiguous Figures 1 and 2, so has the generally denoted by 1, the individual does not interest the internal combustion engine, two exhaust systems 2 and 3 which feed a double-flow accordingly, before pipe 4; the partition between the two strands is indicated at 5 . This exhaust pipe 4 surrounds the exhaust gas converter 6 with its housing 7 is approximately U-för mig, so that a long exhaust pipe that inserts into the internal combustion engine 1 facing end 8 of the converter housing 6 opens. Such a long front pipe behaves favorably with regard to the performance characteristics of the internal combustion engine 1 .
Vorrohr 4 nebst Abgaskonverter 6 sind in dem Behälter 9 angeordnet, dessen der Brennkraftmaschine 1 abgekehrtes Ende die Abgasausleitung 10 unter Bildung ei nes Ausströmspalts 11 für eine Kühlluftströmung umgibt, die den Behälter 9 dann durchsetzt, wenn die Klappe 12 durch das temperaturempfindliche Element 13 in ihre Öffnungsstellung gebracht ist. Die dann entsprechend dem Pfeil 14 einströ mende Kühlluft kann bei einer Fahrzeug-Brennkraftmaschine durch den Fahrtwind, im übrigen aber durch ein Gebläse erzeugt sein. Dargestellt ist demgegenüber die Sperrlage der Klappe 12, die sie bei niedrigen Konverter- oder Abgastempera turen einnimmt, also beispielsweise während des Warmlaufs der Brennkraftma schine 1. Das bedeutet, daß der lufterfüllte Raum zwischen dem Behälter 9 einer seits und dem Konvertergehäuse 7 sowie dem Vorrohr 4 andererseits praktisch ab geschlossen ist und schon durch die das Vorrohr 4 durchströmenden, noch mäßig warmen Abgase eine Aufheizung dieses kleinen Luftvolumens und über dieses auch des Konverters 6 erfolgt. Hinzu kommt, daß diese Aufwärmung nicht nur durch Kon vektion, sondern in gewissem Umfang auch durch Strahlung erfolgt.Front pipe 4 together with exhaust gas converter 6 are arranged in the container 9 , the end of the engine 1 facing away surrounds the exhaust gas discharge line 10 with formation of an outflow gap 11 for a cooling air flow which passes through the container 9 when the flap 12 through the temperature-sensitive element 13 in it Open position is brought. The then flowing in according to arrow 14 cooling air can be generated in a vehicle internal combustion engine by the wind, but otherwise by a fan. In contrast, the blocking position of the flap 12 , which it occupies at low converter or exhaust gas temperatures, is shown, for example during the warm-up of the internal combustion engine 1 . This means that the air-filled space between the container 9 on the one hand and the converter housing 7 and the front pipe 4, on the other hand, is practically closed and already through the exhaust pipe 4 flowing through, still moderately warm exhaust gases, a heating of this small air volume and via this also the converter 6 takes place. In addition, this warming is not only by convection, but to a certain extent also by radiation.
Wie Fig. 2 deutlich zeigt, mündet der Auslaß des Vorrohres 4 tangential in den Endbereich 8 des Konvertergehäuses 6 ein, so daß sich eine spiralförmige Ein strömung des Abgases in das Konvertergehäuses 6 und damit eine gleichmäßige Ab gasbeaufschlagung des Konvertermaterials über seinen gesamten Querschnitt ergibt.As clearly shown in Fig. 2, the outlet of the front pipe 4 opens tangentially into the end region 8 of the converter housing 6 , so that there is a spiral flow of the exhaust gas into the converter housing 6 and thus a uniform gas loading of the converter material over its entire cross-section.
In den Fig. 3 und 4 sind der Abgaskonverter wiederum mit 6 und sein maschinen seitiges Ende mit 8 bezeichnet. Während in dem anhand der Fig. 1 und 2 be schriebenen Ausführungsbeispiel die Zweiflutigkeit des Vorrohres 4 durch die Zwischenwand 5 erzeugt wurde, zeigen die Fig. 3 und 4 Vorrohranordnungen, bei denen die Zweiflutigkeit durch zwei separate Rohre erzeugt ist.In FIGS. 3 and 4, the exhaust gas converter in turn with 6 and its engine-side end 8, respectively. While in the exemplary embodiment described with reference to FIGS . 1 and 2, the dual flow of the front pipe 4 was generated by the intermediate wall 5 , FIGS . 3 and 4 show front pipe arrangements in which the double flow is generated by two separate pipes.
Betrachtet man zunächst Fig. 3, so erkennt man zwei Vorrohre 30 und 31, von de nen das Vorrohr 30 identisch mit dem Vorrohr 4 in den Fig. 1 und 2 verläuft, also den Abgaskonverter 6 außermittig in Achsrichtung desselben U-förmig ein schließt und tangential in das maschinenseitige Ende 8 des Konverters 6 einmündet. Looking first at Fig. 3, one can see two down pipes 30 and 31 , of which the down pipe 30 is identical to the down pipe 4 in Figs. 1 and 2, that is, the exhaust gas converter 6 off-center in the axial direction of the same U-shaped and opens tangentially into the machine end 8 of the converter 6 .
Auch Vorrohr 31 ist U-förmig gestaltet und besitzt das Einlaufende 32, das dem Einlaufende des Vorrohrs 30 etwa diametral gegenüber liegt. Auch das Vorrohr 31 läuft tangential bei 33 in das maschinenseitige Ende 8 des Konverters 6 ein, wo bei die Einlaufstellen der beiden Vorrohre 30 und 31 einander diametral gegen über liegen.The front pipe 31 is also U-shaped and has the inlet end 32 , which is approximately diametrically opposite the inlet end of the front pipe 30 . The front pipe 31 also runs tangentially at 33 into the machine end 8 of the converter 6 , where the entry points of the two front pipes 30 and 31 lie diametrically opposite one another.
In dem Ausführungsbeispiel nach Fig. 4 schließlich besitzt das allgemein mit 40 bezeichnete Vorrohr die beiden Einlaßzweige 41 und 42, die etwa U-förmig verlau fen, also zunächst parallel zur Achse des Abgaskonverters 6 und bezüglich Fig. 4 hinter ihm quer dazu, so daß sie dort zusammenlaufen; von dieser Vereinigungs stelle geht der einen größeren Strömungsquerschnitt besitzende Vorrohrbereich 43 ab, der wiederum tangential in das maschinenseitige Ende 8 des Konverters 6 ein läuft.Finally, in the embodiment according to FIG. 4, the front pipe, generally designated 40 , has the two inlet branches 41 and 42 , which are approximately U-shaped, that is, initially parallel to the axis of the exhaust gas converter 6 and with respect to FIG. 4 behind it, so that they converge there; from this union, the front pipe region 43 has a larger flow cross section, which in turn runs tangentially into the machine-side end 8 of the converter 6 .
Gemeinsam ist allen Ausführungsbeispielen, das die Abgasanlage trotz gedrängter Bauweise große Flächen zum Wärmeaustausch zwischen Vorrohr, Abgaskonverter und Luft in dem Behälter bietet.Common to all exemplary embodiments is that the exhaust system despite being crowded Construction large areas for heat exchange between the front pipe, exhaust gas converter and Provides air in the container.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE4205328A DE4205328A1 (en) | 1991-03-04 | 1992-02-21 | Exhaust system for vehicle incorporating converter - has U=shaped gas feed tube and cooling air supply |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4106776 | 1991-03-04 | ||
DE4205328A DE4205328A1 (en) | 1991-03-04 | 1992-02-21 | Exhaust system for vehicle incorporating converter - has U=shaped gas feed tube and cooling air supply |
Publications (1)
Publication Number | Publication Date |
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DE4205328A1 true DE4205328A1 (en) | 1992-09-10 |
Family
ID=25901552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE4205328A Withdrawn DE4205328A1 (en) | 1991-03-04 | 1992-02-21 | Exhaust system for vehicle incorporating converter - has U=shaped gas feed tube and cooling air supply |
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DE (1) | DE4205328A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4310926A1 (en) * | 1993-04-02 | 1994-10-06 | Siemens Ag | Device and method for the reduction of pollutant emissions in the exhaust gas |
DE19510606A1 (en) * | 1995-03-23 | 1996-09-26 | Himmelsbach Johann | Reducing IC engine exhaust counter pressure |
WO2001025603A1 (en) * | 1999-10-07 | 2001-04-12 | Volkswagen Aktiengesellschaft | Motor vehicle with an internal combustion engine |
EP1111209A2 (en) | 1999-12-23 | 2001-06-27 | Faurecia Abgastechnik GmbH | Exhaust apparatus for motor vehicles |
EP1275829A1 (en) * | 2001-07-10 | 2003-01-15 | Bayerische Motoren Werke Aktiengesellschaft | Device for controlling exhaust gases temperature |
AT501402A1 (en) * | 2004-08-19 | 2006-08-15 | Avl List Gmbh | Internal combustion engine for hand tool or vehicle has exhaust pipe partially surrounding exhaust gas treatment catalytic converter |
FR2930284A1 (en) * | 2008-04-16 | 2009-10-23 | Faurecia Sys Echappement | Exhaust line for e.g. direct injection petrol engine, of motor vehicle, has exhaust gas circulation conduit with developed length that is lower than fifty percent of length of U-shaped exhaust gas circulation conduit |
DE102017101923A1 (en) | 2017-02-01 | 2018-08-02 | Eberspächer Exhaust Technology GmbH & Co. KG | exhaust system |
US10697338B2 (en) | 2017-01-05 | 2020-06-30 | Eberspächer Exhaust Technology GmbH & Co. KG | Exhaust system |
-
1992
- 1992-02-21 DE DE4205328A patent/DE4205328A1/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4310926A1 (en) * | 1993-04-02 | 1994-10-06 | Siemens Ag | Device and method for the reduction of pollutant emissions in the exhaust gas |
DE19510606A1 (en) * | 1995-03-23 | 1996-09-26 | Himmelsbach Johann | Reducing IC engine exhaust counter pressure |
WO2001025603A1 (en) * | 1999-10-07 | 2001-04-12 | Volkswagen Aktiengesellschaft | Motor vehicle with an internal combustion engine |
EP1111209A2 (en) | 1999-12-23 | 2001-06-27 | Faurecia Abgastechnik GmbH | Exhaust apparatus for motor vehicles |
EP1275829A1 (en) * | 2001-07-10 | 2003-01-15 | Bayerische Motoren Werke Aktiengesellschaft | Device for controlling exhaust gases temperature |
AT501402A1 (en) * | 2004-08-19 | 2006-08-15 | Avl List Gmbh | Internal combustion engine for hand tool or vehicle has exhaust pipe partially surrounding exhaust gas treatment catalytic converter |
AT501402B1 (en) * | 2004-08-19 | 2007-07-15 | Avl List Gmbh | Internal combustion engine for hand tool or vehicle has exhaust pipe partially surrounding exhaust gas treatment catalytic converter |
FR2930284A1 (en) * | 2008-04-16 | 2009-10-23 | Faurecia Sys Echappement | Exhaust line for e.g. direct injection petrol engine, of motor vehicle, has exhaust gas circulation conduit with developed length that is lower than fifty percent of length of U-shaped exhaust gas circulation conduit |
US10697338B2 (en) | 2017-01-05 | 2020-06-30 | Eberspächer Exhaust Technology GmbH & Co. KG | Exhaust system |
DE102017101923A1 (en) | 2017-02-01 | 2018-08-02 | Eberspächer Exhaust Technology GmbH & Co. KG | exhaust system |
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