DE19833619A1 - Exhaust gas system for supercharged internal combustion engines, with bypass line divided downstream of branch from exhaust gas line into two guide paths - Google Patents

Exhaust gas system for supercharged internal combustion engines, with bypass line divided downstream of branch from exhaust gas line into two guide paths

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Publication number
DE19833619A1
DE19833619A1 DE19833619A DE19833619A DE19833619A1 DE 19833619 A1 DE19833619 A1 DE 19833619A1 DE 19833619 A DE19833619 A DE 19833619A DE 19833619 A DE19833619 A DE 19833619A DE 19833619 A1 DE19833619 A1 DE 19833619A1
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Germany
Prior art keywords
line
exhaust gas
exhaust
bypass line
bypass
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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Withdrawn
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DE19833619A
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German (de)
Inventor
Thomas F Brachert
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Priority to DE19833619A priority Critical patent/DE19833619A1/en
Publication of DE19833619A1 publication Critical patent/DE19833619A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • 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
    • 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
    • F01N3/18—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
    • 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

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

Abstract

The exhaust gas system has a main catalytic converter and a valve-controlled starting converter. The bypass line, downstream of its branching out from the exhaust gas line, is divided into two guide paths (18, 20) able to be blocked together or separately by a valve device (22). The starting converter is in one of these two paths.

Description

Die Erfindung bezieht sich auf eine Abgasanlage für Brennkraftmaschinen mit Abgasturboaufladung und Abgasreinigung gemäß dem Oberbegriff des Anspruches 1.The invention relates to an exhaust system for internal combustion engines Exhaust gas turbocharging and exhaust gas purification according to the preamble of claim 1.

Bei Brennkraftmaschinen mit einem Katalysator zur Abgasentgiftung ist die möglichste Verkürzung der Zeitspanne bis zum Erreichen der Anspringtemperatur des Katalysators eine der wichtigsten Aufgaben, um die weitestgehende Vermeidung der Emission von schädlichen Abgasen zu erreichen. In der DE 43 11 904 A1 wurde zu diesem Zweck bei einer aufgeladenen Brennkraftmaschine bereits vorgeschlagen einen Katalysator in zwei getrennt zu beaufschlagende Katalysatorbereiche zu unterteilen und während der Warmlaufphase der Brennkraftmaschine eine die Abgasturbine des Turboladers umgehende Abblaseleitung zur Beaufschlagung eines ersten, eine Art Startkatalysator bildenden Katalysatorbereiches heranzuziehen. Beabsichtigt ist dabei den einen Katalysatorbereich wesentlich schneller zu erwärmen und dadurch die Anspringtemperatur des Katalysators insgesamt früher zu erreichen. Problematisch ist dabei jedoch der Umstand, daß die in der Hauptsache der Regelung des Ladedruckes zugeordnete Abblaseleitung für die Beaufschlagung des ersten Katalysatorbereiches herangezogen wird, was notwendigerweise auch zur Folge hat, daß im Zusammenhang mit der Ladedruckregelung der erste den Startkatalysator bildende Katalysatorbereich auch bei betriebswarmer Brennkraftmaschine mit Abgas beaufschlagt wird, was die Gefahr einer Überhitzung und damit einer vorzeitigen Zerstörung des ersten Katalysatorbereiches mit sich bringt.This is the most possible for internal combustion engines with a catalytic converter for exhaust gas detoxification Shortening the time until the light-off temperature of the One of the most important tasks to avoid the catalyst as far as possible To achieve emission of harmful exhaust gases. In DE 43 11 904 A1 was to already proposed for this purpose in a supercharged internal combustion engine a catalyst into two separately charged catalyst areas subdivide and during the warm-up phase of the internal combustion engine Exhaust gas turbine of the turbocharger immediate blow-off line to act on a first to use a catalyst region forming a kind of starting catalyst. The intention is to heat the one catalyst area much faster and thereby reach the light-off temperature of the catalyst overall earlier. However, the problem is that the main point of the regulation Blow-off line assigned to the boost pressure for the application of the first Catalyst area is used, which necessarily also results in that in connection with the charge pressure control, the first the starting catalyst forming catalytic converter area even in a warm internal combustion engine with exhaust gas is applied, which increases the risk of overheating and therefore premature Destruction of the first catalyst area entails.

Aus der US-PS 4 404 804 ist eine vergleichbare Abgasanlage für eine aufgeladene und mit einer aus einem Start- und einem Hauptkatalysator bestehenden Abgasentgiftungseinrichtung versehene Brennkraftmaschine bekannt, bei welcher ein einem Hauptkatalysator vorgeschalteter Startkatalysator in einer die Turbine des Abgasturboladers umgehenden Bypassleitung angeordnet ist, und bei welcher ein in Abhängigkeit von der Temperatur der Brennkraftmaschine wechselweise die zur Abgasturbine führende Abgasleitung oder die die Abgasturbine umgehende und den Startkatalysator beinhaltende Bypassleitung absperrendes Ventil vorgesehen ist. Bei dieser bekannten Anlage wird das Abgas solange an der Abgasturbine vorbei durch den Startkatalysator geleitet bis der Hauptkatalysator seine Betriebstemperatur erreicht hat. Nachteilig an dieser bekannten Abgasanlage ist, daß eine Nutzung der Bypassleitung als Abblaseleitung zur Regulierung des Ladedruckes bei betriebswarmer Brennkraftmaschine und betriebsbereitem Hauptkatalysator nicht oder nur unter Überlastung des Startkatalysators möglich ist.From US-PS 4 404 804 is a comparable exhaust system for a supercharged and with one consisting of a start and a main catalyst Exhaust gas detoxification device provided internal combustion engine, in which a a main catalytic converter upstream in a the turbine of the Exhaust gas turbocharger bypass line is arranged, and in which an in Dependent on the temperature of the internal combustion engine alternately  Exhaust gas turbine leading exhaust pipe or the bypassing the exhaust gas turbine and the Bypass line shut-off valve containing the starting catalyst is provided. At In this known system, the exhaust gas is passed through the exhaust gas turbine the starting catalytic converter until the main catalytic converter reaches its operating temperature has reached. A disadvantage of this known exhaust system is that use of the Bypass line as blow-off line to regulate the boost pressure warm internal combustion engine and ready main catalyst not or is only possible if the catalytic converter is overloaded.

Es ist Aufgabe der Erfindung eine zur Verringerung der Emission schädlicher Abgase im Warmlauf mit einem Startkatalysator ausgestattete Abgasanlage für eine aufgeladene Brennkraftmaschine unter Einsatz einfacher Mittel dahingehend zu verbessern, daß eine Gefährdung des Startkatalysators ausgeschlossen ist.It is an object of the invention to reduce the emission of harmful exhaust gases exhaust gas system equipped with a starting catalytic converter for one supercharged internal combustion engine using simple means to that effect improve that there is no danger to the catalytic converter.

Nach der Erfindung wird diese Aufgabe durch die Merkmale des Patentanspruchs 1 gelöst. Weitere die Erfindung ausgestaltende Merkmale sind in den Unteransprüchen enthalten.According to the invention, this object is achieved by the features of claim 1 solved. Further features embodying the invention are in the subclaims contain.

Der mit der Erfindung hauptsächlich erzielte Vorteil ist darin zu sehen, daß der Beaufschlagung des Startkatalysators und der wenigstens teilweise durch Abblasen von Abgas zu bewerkstelligenden Ladedruckregelung jeweils ein eigener Leitungsweg der die Turbine des Abgasturboladers umgehenden Bypassleitung zugeordnet ist, so daß eine Überschneidung zweier Funktionen der Bypassleitung vermieden und damit einerseits eine optimale, feinfühlige Regelung des Ladedruckes gewährleistet und andererseits zugleich eine Gefährdung bzw. Überlastung des Startkatalysators durch zur Regelung des Ladedruckes abzublasenden heißen Abgases vermieden wird. Die erfindungsgemäße Aufteilung der die Bypassleitung in zwei Leitungswege eröffnet ferner die Möglichkeiten zunächst einer raumsparenden Auslegung und Anordnung beider Leitungswege und im Weiteren einer einfachen Gestaltung einer Ventileinrichtung zum wahlweisen Betrieb der Bypassleitung als reine Abblaseleitung oder als Leitungsweg zur Beaufschlagung des Startkatalysators.The main advantage achieved with the invention is that the Actuation of the starting catalytic converter and at least partially by blowing off each of them has its own line path from exhaust gas to the charge pressure control which is assigned to the bypass line of the turbine of the exhaust gas turbocharger, so that an overlap of two functions of the bypass line is avoided and thus on the one hand, an optimal, sensitive regulation of the boost pressure is guaranteed and on the other hand, a risk or overload of the starting catalyst hot exhaust gas to be blown off to regulate the boost pressure is avoided. The division of the bypass line into two line paths according to the invention furthermore the possibilities of a space-saving design and arrangement both routes and furthermore a simple design of one  Valve device for optional operation of the bypass line as a pure blow-off line or as a route for loading the catalytic converter.

In der Zeichnung wird ein Ausführungsbeispiel der Erfindung gezeigt welches nachstehend näher beschrieben sind. Es zeigen:In the drawing, an embodiment of the invention is shown which are described in more detail below. Show it:

Fig. 1 eine schematische Darstellung einer Abgasanlage für eine Brennkraftmaschine mit Abgasturboaufladung und Abgasreinigung während der Beaufschlagung des Startkatalysators im Warmlauf; Figure 1 is a schematic representation of an exhaust system for an internal combustion engine with exhaust gas turbocharging and exhaust gas purification during the application of the starting catalyst during warm-up.

Fig. 2 eine Darstellung einer Abgasanlage gemäß Fig. 1 bei betriebswarmer Brennkraftmaschine und geschlossener Bypassleitung; FIG. 2 shows an exhaust system according to FIG. 1 when the internal combustion engine is at operating temperature and the bypass line is closed; FIG.

Fig. 3 eine Darstellung einer Abgasanlage gemäß Fig. 1 bei betriebswarmer Brennkraftmaschine und geöffneter Abblaseleitung. FIG. 3 shows an exhaust system according to FIG. 1 with the internal combustion engine at operating temperature and the blow-off line open.

Eine lediglich schematisch angedeutete Brennkraftmaschine besitzt eine Anzahl vermittels Pleuelstangen 1 mit einer Kurbelwelle 2 zusammenwirkender in jeweils einem Zylinder 3 arbeitender Hubkolben 4, wobei die Zylinder 3 periodisch über je ein Einlaßventil 5 mit einer Ansaugleitung 6 und über ein Auslaßventil 7 mit einer Abgasanlage 8 verbunden werden. Bei der gezeigten aufgeladenen Brennkraftmaschine wird die Ansaugleitung 6 vermittels eines Verdichters 9 mit vorverdichteter Luft versorgt, wobei dem Verdichter 9 eine mit einem Luftfilter 10 ausgestatteter Ansaugstutzen vorgeschaltet ist. Zum Antrieb des Verdichter 9 ist eine Abgasturbine 11 zugeordnet, welche mit dem Kompressor über eine Antriebswelle 12 verbunden ist. Die Abgasanlage 8 umfaßt eine zur Turbine 11 des Abgasturboladers führende Abgasleitung 13, welche stromab des Turbinengehäuses 14 der Abgasturbine durch eine einen Hauptkatalysator 15 und wenigstens einen in der Zeichnung nicht näher dargestellten Schalldämpfer enthaltende Auspuffleitung 16 fortgesetzt ist. Stromauf der Abgasturbine 11 von der Abgasleitung 13 abzweigend ist eine die Abgasturbine 11 umgehende Bypassleitung 17 angeordnet. Die Bypassleitung 17 ist mit Abstand zur Abgasleitung 13 in einen eine reine Abblaseleitung bildenden Leitungsweg 18 und einen einen Startkatalysator 19 enthaltenden Leitungsweg 20 unterteilt, wobei der den Startkatalysator 19 enthaltende Leitungsweg 20 gegenüber dem die reine Abblaseleitung 18 bildenden Leitungsweg stromab von der Bypassleitung 17 abzweigt. Eine dem Umschalten zwischen dem Verschluß der Bypassleitung 17 gegenüber der Abgasleitung und einer Nutzung der Bypassleitung 17 als Abblaseleitung sowie der Nutzung der Bypassleitung 17 zur Beaufschlagung des Startkatalysators 19 während des Warmlaufes der Brennkraftmaschine zugeordnete Ventilanordnung 21 umfaßt in der im Ausführungsbeispiel gezeigten Ausführungsform einen Schieber 22. Der Schieber 22 ist dabei in einer zur Bypassleitung 17 koaxialen Ausrichtung axial verschieblich und um seine Achse drehbar in einem in der Zeichnung lediglich andeutungsweise gezeigten Gehäuse 23 aufgenommen und in Abhängigkeit von in der Zeichnung nicht besonders dargestellten Steuer- und Antriebsmitteln zwischen seinen verschiedenen Schaltlagen hin und her verstellbar. Der Schieber 22 ist während der Warmlaufphase der Brennkraftmaschine in seine in der Fig. 1 gezeigte Schaltstellung verschoben und verschwenkt, in welcher er die Abgasleitung 13 absperrt und zugleich über seinen Durchgangsweg 24 eine Leitungsverbindung zwischen dem der Bypassleitung 17 gegenüber stromauf liegenden Bereich der Abgasleitung 13 und der in der Bypassleitung 17 der Abblaseleitung gegenüber stromab gelegenen, den Startkatalysator 19 enthaltenden Leitungsweg 20 gewährleistet. In dieser Stellung bildet der Schieber 22 zugleich einen Verschluß für die der den Startkatalysator 19 enthaltenden Leitung 20 gegenüber stromauf liegende Abblaseleitung 18.An internal combustion engine, indicated only schematically, has a number of connecting pistons 1 with a crankshaft 2 , each of which operates in a cylinder 3 , reciprocating piston 4 , the cylinders 3 being periodically connected via an inlet valve 5 to an intake line 6 and via an outlet valve 7 to an exhaust system 8 . In the illustrated supercharged internal combustion engine, the intake passage 6 is supplied by means of a compressor 9 with pre-compressed air, wherein the compressor 9 is preceded by a filter equipped with an air intake 10. An exhaust gas turbine 11 , which is connected to the compressor via a drive shaft 12 , is assigned to drive the compressor 9 . The exhaust system 8 comprises an exhaust pipe 13 leading to the turbine 11 of the exhaust gas turbocharger, which is continued downstream of the turbine housing 14 of the exhaust gas turbine by an exhaust pipe 16 containing a main catalytic converter 15 and at least one silencer not shown in the drawing. A bypass line 17 bypassing the exhaust gas turbine 11 is arranged upstream of the exhaust gas turbine 11 from the exhaust gas line 13 . The bypass line 17 is divided with distance from the exhaust pipe 13 in a pure blow-off line forming conductive path 18 and a one start catalyst 19 containing conductive path 20, wherein the branches of the start catalyst 19 conductive path containing 20 relative to the pure blow-off line downstream 18 forming conductive path from the bypass line 17th A switching between the closure of the bypass line 17 relative to the exhaust pipe and a use of the bypass line 17 as the blow-off line and the use of the bypass line 17 associated with the loading of the starting catalyst 19 during the warm-running of the internal combustion engine valve arrangement 21 comprises in the embodiment shown in the exemplary embodiment embodiment of a slider 22nd The slide 22 is in a coaxial to the bypass line 17 axially displaceable and rotatable about its axis in a housing 23 only shown in the drawing and depending on control and drive means not shown in the drawing between its various switching positions and adjustable. The slide 22 is shifted and pivoted during the warm-up phase of the internal combustion engine into its switching position shown in FIG. 1, in which it shuts off the exhaust line 13 and at the same time, via its passage 24, a line connection between the bypass line 17 and the upstream region of the exhaust line 13 and 19 containing conductive path 20 ensures in the bypass pipe 17 of the blow-off line with respect to the downstream, the start catalyst. In this position, the slider 22 also forms a closure for the starting catalyst 19 containing conduit 20 from upstream exhaust line eighteenth

In seiner in der Fig. 2 dargestellten und gegenüber derjenigen nach der Fig. 1 lediglich axial verschobenen Schaltlage bewirkt der Schieber 22 einen völligen Abschluß der Bypassleitung 17, so daß die Abgasturbine 11 mit sämtlichen Abgasen der Brennkraftmaschine beaufschlagt wird. In seiner in der Fig. 3 dargestellten Schaltlage gibt der Schieber 22 die Bypassleitung 17 und deren Verbindung mit dem von ihr abzweigenden, eine reine Abblaseleitung bildenden Leitungsweg 18 frei und sperrt gleichzeitig den den Startkatalysator 19 beinhaltenden Leitungsweg 20 ab, so daß eine der Freigabe der Bypassleitung 17 entsprechende Menge Abgas unter Umgehung der Abgasturbine 11 abgeblasen wird. Bei dem in der Zeichnung dargestellten Ausführungsbeispiel ist weiterhin vorgesehen, daß das den Schieber 22 enthaltende Gehäuse die Abblaseleitung 18 in einem Abstand zu ihrer Abzweigung von der Bypassleitung 17 durchgreift und in diesem Bereich einen Durchgangsweg für die Abblasegase aufweist.In its switching position shown in FIG. 2 and only axially displaced compared to that of FIG. 1, the slide 22 brings about a complete closure of the bypass line 17 , so that the exhaust gas turbine 11 is acted upon with all exhaust gases from the internal combustion engine. In its switching position shown in FIG. 3, the slide 22 releases the bypass line 17 and its connection to the line path 18 branching from it, which forms a pure blow-off line, and at the same time shuts off the line path 20 containing the starting catalytic converter 19 , so that one of the release of the Bypass line 17 corresponding amount of exhaust gas is bypassed bypassing the exhaust gas turbine 11 . In the embodiment shown in the drawing, it is further provided that the housing containing the slide 22 extends through the blow-off line 18 at a distance from its branch from the bypass line 17 and has a passage for the blow-off gases in this area.

Claims (8)

1. Gasanlage für Brennkraftmaschinen mit Abgasturboaufladung und Abgasreinigung, in deren Abgasleitung stromauf der Abgasturbine eines Abgasturboladers eine von einem Ventil beherrschte, mit einen Startkatalysator bestückte Bypassleitung und stromab der Abgasturbine des Abgasturboladers ein Hauptkatalysator angeordnet sind und bei das der Bypassleitung zugeordnete Ventil wechselweise die zur Abgasturbine führende Abgasleitung oder die den Startkatalysator enthaltende Bypaßleitung absperrt, dadurch gekennzeichnet, daß die Bypassleitung (17) stromab ihrer Abzweigung aus der Abgasleitung (13) in zwei mittels einer Ventilanordnung (22) wechselweise oder gemeinsam absperrbare Leitungswege (18, 20), in deren einem (Leitungsweg (20) der Startkatalysator (19) angeordnet ist, unterteilt ist.1.Gas system for internal combustion engines with exhaust gas turbocharging and exhaust gas purification, in whose exhaust line upstream of the exhaust gas turbine of an exhaust gas turbocharger a bypass valve controlled by a valve, equipped with a starting catalytic converter and downstream of the exhaust gas turbine of the exhaust gas turbocharger, a main catalytic converter are arranged, and in the case of the valve assigned to the bypass line, the alternate ones to the exhaust gas turbine Shut off leading exhaust line or the bypass line containing the starting catalyst, characterized in that the bypass line ( 17 ) downstream of its branch from the exhaust line ( 13 ) in two line paths ( 18 , 20 ) which can be shut off alternately or jointly by means of a valve arrangement ( 22 ), in one of which (Line path ( 20 ) of the catalytic converter ( 19 ) is arranged, is divided. 2. Abgasanlage nach Anspruch 1, dadurch gekennzeichnet, daß zumindest der dem Absperren bzw. Freigeben des den Startkatalysator (19) enthaltenden Leitungsweges (20) der Bypassleitung (17) zugeordnete Teil der Ventilanordnung (22) ein wechselweises Absperren und Freigeben der zur Abgasturbine (11) führenden Abgasleitung (13) und des den Startkatalysator (19) enthaltenden Leitungsweges (20) der Bypassleitung (17) gewährleistet.2. Exhaust system according to claim 1, characterized in that at least the part of the valve arrangement ( 22 ) associated with shutting off or releasing the line path ( 20 ) containing the starting catalytic converter ( 19 ) of the bypass line ( 17 ) alternately shutting off and releasing the exhaust gas turbine ( 11 ) leading exhaust line ( 13 ) and the line path ( 20 ) containing the starting catalyst ( 19 ) of the bypass line ( 17 ). 3. Abgasanlage nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Aufteilung der Bypassleitung (17) in zwei Leitungswege (18, 20), deren einer den Startkatalysator (19) enthält im Abstand zu ihrer Abzweigung aus der Abgasleitung (13) angeordnet ist.3. Exhaust system according to claim 1 and 2, characterized in that the division of the bypass line ( 17 ) into two line paths ( 18 , 20 ), one of which contains the starting catalyst ( 19 ) is arranged at a distance from its branch from the exhaust line ( 13 ) . 4. Abgasanlage nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der als Abblaseleitung dem freien Durchgang des Abgases zugeordnete Leitungsweg (18) der Bypassleitung (17) stromauf des den Startkatalysator (19) enthaltenden Leitungsweges (20) an die Bypassleitung (17) angeschlossen ist. 4. Exhaust system according to claim 1 to 3, characterized in that as the blow-off line associated with the free passage of the exhaust gas line path ( 18 ) of the bypass line ( 17 ) upstream of the starting catalyst ( 19 ) containing line path ( 20 ) connected to the bypass line ( 17 ) is. 5. Abgasanlage nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß dem wechselweisen Absperren oder Freigeben einerseits der zur Turbine (11) des Abgasturboladers führenden Abgasleitung (13) und andererseits der Bypassleitung (17) sowie deren beider Leitungswege (18, 20) eine als axial verstellbarer Schieber (22) ausgebildete Ventileinrichtung (21) zugeordnet ist.5. Exhaust system according to claim 1 to 4, characterized in that the alternate shut-off or release on the one hand of the exhaust gas line leading to the turbine ( 11 ) of the exhaust gas turbocharger ( 13 ) and on the other hand the bypass line ( 17 ) and their two line paths ( 18 , 20 ) as a axially adjustable slide ( 22 ) is associated with a valve device ( 21 ). 6. Abgasanlage nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß der Schieber (22) mit wenigstens einem zwei zueinander beabstandete Mündungen aufweisenden Durchgangsweg (24) ausgestattet und die Bypassleitung (17) durchgreifend derart axial verschiebbar angeordnet ist, daß die eine Mündung seines Durchgangsweges (24) mit der Abgasleitung (13) und die andere Mündung seines Durchgangsweges (24) mit dem den Startkatalysator (19) enthaltenden Leitungsweg (20) der Bypassleitung (17) korrespondiert.6. Exhaust system according to claim 1 to 5, characterized in that the slide ( 22 ) is equipped with at least one two spaced-apart orifices having a passage ( 24 ) and the bypass line ( 17 ) is arranged so that it is axially displaceable so that the one mouth of its passage (24) to the exhaust pipe (13) and the other mouth of its passageway (24) to the starting catalyst (19) containing conductive path (20) of the bypass line (17) corresponds. 7. Abgasanlage nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß der Schieber (22) quer zu den beiden Leitungswegen (18, 20) der Bypassleitung (17) und auch quer zu der zur Turbine (11) des Abgasturboladers führenden Abgasleitung (13) verstellbar ist und in einer ersten Schiebestellung (SchI) bei gleichzeitiger Freigabe des den Startkatalysator (19) enthaltenden Leitungsweges (20) der Bypassleitung (17) ein Absperren der zur Abgasturbine führenden Abgasleitung (13) bewirkt, in einer zweiten Schiebestellung (SchII) die Bypassleitung (17) insgesamt, d. h. samt ihrer beiden Leitungswege (18, 20), absperrt und in einer dritten Schiebestellung (SchIII) den zweiten, die Abblaseleitung bildenden Leitungsweg (18) der Bypassleitung (17) freigibt.7. Exhaust system according to claim 1 to 6, characterized in that the slide ( 22 ) transversely to the two conduit paths ( 18 , 20 ) of the bypass line ( 17 ) and also transversely to the exhaust pipe ( 13 ) leading to the turbine ( 11 ) of the exhaust gas turbocharger. is adjustable and in a first sliding position (SchI) with simultaneous release of the line path ( 20 ) containing the starting catalytic converter ( 19 ) of the bypass line ( 17 ) shuts off the exhaust pipe ( 13 ) leading to the exhaust gas turbine, in a second sliding position (SchII) the bypass line ( 17 ) as a whole, ie including their two conduit paths ( 18 , 20 ), and in a third sliding position (SchIII) releases the second conduit path ( 18 ) of the bypass line ( 17 ) forming the blow-off line. 8. Abgasanlage nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß der zweite die Abblaseleitung bildende Leitungsweg (18) der Bypassleitung (17) eine parallel zum ersten den Startkatalysator (19) beinhaltenden Leitungsweg (20) ausgerichtete Erstreckung aufweist und in diesem Bereich vom Schieber (22) durchsetzt ist, wobei der Schieber (22) in seinem den zweiten Leitungsweg (18) durchgreifenden Bereich mit einer entsprechenden weiteren Durchlaßöffnung versehen ist.8. Exhaust system according to claim 1 to 7, characterized in that the second line forming the blow-off line ( 18 ) of the bypass line ( 17 ) has a parallel to the first starting catalyst ( 19 ) containing line path ( 20 ) and in this area from the slide ( 22 ) is penetrated, the slide ( 22 ) being provided with a corresponding further passage opening in its area penetrating the second line path ( 18 ).
DE19833619A 1998-07-25 1998-07-25 Exhaust gas system for supercharged internal combustion engines, with bypass line divided downstream of branch from exhaust gas line into two guide paths Withdrawn DE19833619A1 (en)

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DE10233495A1 (en) * 2002-07-24 2004-01-29 Bayerische Motoren Werke Ag Internal combustion engine comprises a bypass pipe opening into an exhaust pipe downstream of a catalyst
EP1396619A1 (en) 2002-09-05 2004-03-10 BorgWarner Inc. Supercharging system for an internal combustion engine
EP1550796A1 (en) * 2003-12-29 2005-07-06 Iveco S.p.A. Method for controlling the temperature of the exhaust gases in an engine and the relative engine apparatus
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EP1152133A3 (en) * 2000-05-03 2003-05-02 Audi Ag Exhaust gas purifying apparatus
DE10233495A1 (en) * 2002-07-24 2004-01-29 Bayerische Motoren Werke Ag Internal combustion engine comprises a bypass pipe opening into an exhaust pipe downstream of a catalyst
EP1396619A1 (en) 2002-09-05 2004-03-10 BorgWarner Inc. Supercharging system for an internal combustion engine
EP1550796A1 (en) * 2003-12-29 2005-07-06 Iveco S.p.A. Method for controlling the temperature of the exhaust gases in an engine and the relative engine apparatus
DE102005056011A1 (en) * 2005-11-24 2007-06-06 Volkswagen Ag Internal combustion engine for motor vehicle, has exhaust system and exhaust gas turbocharger whereby disperse-outlet of turbine is connected with first exhaust gas flux
DE102007002829A1 (en) * 2007-01-19 2008-07-31 Audi Ag Internal combustion engine unit has internal combustion engine with two exhaust gas tracts and two exhaust gas turbochargers each of which is connected with both exhaust gas tracts
DE102007021526A1 (en) * 2007-05-04 2008-11-06 Volkswagen Ag Combustion engine, especially for motor vehicle, uses waste-gate for exhaust-gas turbo-charger with additional waste-gate joined to coolant circuit
WO2009032141A1 (en) * 2007-08-30 2009-03-12 Caterpillar Inc. Machine, engine system and operating method
US8069651B2 (en) 2007-08-30 2011-12-06 Caterpillar Inc. Machine, engine system and operating method
WO2009043487A1 (en) * 2007-09-27 2009-04-09 Behr Gmbh & Co. Kg Multi-stage supercharging group, multi-stage supercharging device, and supercharging system
FR2936979A1 (en) * 2008-10-14 2010-04-16 Renault Sas Passenger compartment heating device for motor vehicle, has heat exchanger placed in heat regulation circuit, where circuit comprises pump to circulate heat transfer fluid, and forced air heater to blow heat regulated air into compartment
DE102009049993A1 (en) * 2009-10-20 2011-04-21 Continental Automotive Gmbh Turbine for an exhaust gas turbocharger, exhaust gas turbocharger, motor vehicle and method for operating an exhaust gas turbocharger
US8991174B2 (en) 2009-10-20 2015-03-31 Continental Automotive Gmbh Turbine for an exhaust turbocharger, exhaust turbocharger, motor vehicle and method for operating an exhaust turbocharger
US20130004374A1 (en) * 2010-03-12 2013-01-03 Toyota Jidosha Kabushiki Kaisha Exhaust purification system for internal combustion engine
EP2385231A3 (en) * 2010-05-04 2013-01-23 Alpraaz AB Exhaust system for a combustion engine
DE102010043327A8 (en) * 2010-11-03 2012-08-16 Bosch Mahle Turbo Systems Gmbh & Co. Kg Internal combustion engine, turbine, exhaust gas turbocharger
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WO2014020230A1 (en) * 2012-07-30 2014-02-06 Wärtsilä Finland Oy An internal combustion engine and method of operating an internal combustion engine
DE102015201185A1 (en) * 2015-01-23 2016-07-28 Ford Global Technologies, Llc External turbine bypass for rapid heating of the catalyst
DE102015201185B4 (en) * 2015-01-23 2017-10-19 Ford Global Technologies, Llc External turbine bypass for rapid heating of the catalyst
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US11111844B2 (en) 2018-10-26 2021-09-07 BMTS Technology GmbH & Co. KG Method for operating a combustion engine system
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WO2020201292A1 (en) * 2019-04-05 2020-10-08 Perkins Engines Company Ltd Improvements in twin turbocharger systems
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US20220162984A1 (en) * 2019-04-05 2022-05-26 Parkins Engines Company Limited Improvements in twin turbocharger systems
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