EP0955453A2 - Exhaust manifold - Google Patents

Exhaust manifold Download PDF

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Publication number
EP0955453A2
EP0955453A2 EP99108095A EP99108095A EP0955453A2 EP 0955453 A2 EP0955453 A2 EP 0955453A2 EP 99108095 A EP99108095 A EP 99108095A EP 99108095 A EP99108095 A EP 99108095A EP 0955453 A2 EP0955453 A2 EP 0955453A2
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EP
European Patent Office
Prior art keywords
gas
exhaust manifold
deflecting element
pipes
exhaust
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Withdrawn
Application number
EP99108095A
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German (de)
French (fr)
Other versions
EP0955453A3 (en
Inventor
Rainer Diez
Friedrich Dipl.-Ing. Hartmann
Frank Dipl.-Ing. Bühler
Roland Dr.-Ing. Ries
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.)
Friedrich Boysen GmbH and Co KG
Original Assignee
Friedrich Boysen GmbH and Co KG
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Publication date
Application filed by Friedrich Boysen GmbH and Co KG filed Critical Friedrich Boysen GmbH and Co KG
Publication of EP0955453A2 publication Critical patent/EP0955453A2/en
Publication of EP0955453A3 publication Critical patent/EP0955453A3/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having thermal insulation
    • 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
    • F01N13/14—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 thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings
    • F01N13/143—Double-walled exhaust pipes or housings with air filling the space between both walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector

Definitions

  • the present invention relates to an exhaust manifold, in particular for turbocharged internal combustion engines, with a plurality of exhaust pipes which run between a first flange on the engine side and a second flange on the gas outlet side and have a strong curvature in the region of the second flange, in particular in the region of approximately 90 °.
  • Exhaust manifolds made of cast material have a considerably higher weight than exhaust manifolds made of sheet steel, since the wall thickness is comparatively large compared to these.
  • the invention has for its object to provide an exhaust manifold of the type mentioned, which does not have these disadvantages.
  • an exhaust manifold is to be specified which, despite its low weight, enables very small radii of curvature and can therefore be used for turbo engines.
  • the exhaust pipes comprise pipes made of sheet metal, in particular sheet steel, and at least one gas deflecting element made of cast or forged metal, in particular steel, arranged in the region of the second flange, in particular steel, with exhaust gas passages, the pipes having one end are connected to the first flange and with their other end to the gas deflecting element.
  • the idea of the invention is therefore to construct the exhaust manifold from two different materials, namely firstly from weight-saving pipes made from sheet metal and secondly from a gas deflecting element made from cast metal. Cast metal is therefore only used for the area of the exhaust manifold in which the strong curvature of the exhaust pipes is required, ie in the vicinity of the flange on the gas outlet side.
  • the overall weight of the exhaust manifold can be reduced by this configuration of the exhaust manifold according to the invention.
  • the manufacturing costs are increased compared to a cast manifold.
  • weight reduction especially in the engine area, is very important, so that the cost increase seems justifiable.
  • the increase in costs can be at least partially offset by the weight advantages.
  • the configuration according to the invention gives the possibility of making the exhaust manifold so flat that the exhaust manifold can be arranged in front of its outlet openings without protruding beyond the cylinder flange. Even straight access to all cylinder flange screw connections can be kept free.
  • the gas-carrying pipes have a very low mass and can also be provided with a heat-insulating outer shell. As a result, the catalytic converter heats up faster and reaches its effectiveness earlier.
  • the gas deflecting element is made of investment casting, in particular with a wall thickness of approximately 2 mm.
  • the weight of the exhaust manifold according to the invention can thus advantageously be reduced further.
  • a common gas deflecting element is provided for all pipes. This simplifies the design and manufacture of the exhaust manifold, thereby reducing costs.
  • the gas deflection element preferably has star-shaped outward-facing connection openings for the pipes and an outlet opening which is approximately perpendicularly downward and is connected to the gas inlet openings via the exhaust gas channels. This results in an optimal connection possibility for the pipes coming from the cylinder flange and the turbocharger in the immediate vicinity of the cylinder flange.
  • the outlet side of the gas deflecting element forms the second flange.
  • the gas deflecting element receives thereby a third function in addition to the redirection and collection function. This is space and cost saving.
  • the gas deflection element has means for fastening a turbocharger, in particular bushings for fastening bolts. This gives the gas deflection element another function, and the turbocharger can also be attached to the exhaust manifold in a space-saving and cost-saving manner.
  • the tubes are each connected directly to the gas deflecting element, that is to say run independently of one another. This makes the pipes easy to manufacture. In addition, thermal expansion can be better distributed.
  • the mutually independent pipes also have the advantage that they only have to carry themselves, which is important because of the relatively low carrying properties of hot sheet metal pipes.
  • the tubes with a sliding seat are connected to the gas deflecting element. This further improves the behavior of the pipes under thermal expansion.
  • the tubes are manufactured using a hydrostatic forming process.
  • This process enables the pipes to be produced with any curvature and high dimensional accuracy.
  • the deflection element can also be manufactured as an investment casting with a high degree of dimensional accuracy, there is a high overall dimensional accuracy of the exhaust pipes. This is particularly true in the area of the sliding seat between the pipes and the gas deflecting element important to obtain maximum tightness at this point. The entry of impurities, which could damage the turbocharger, is largely prevented, since no support elements are required.
  • the tubes are each surrounded by a cladding tube made of metal, in particular sheet steel, with the formation of an air gap.
  • This air gap insulation advantageously reduces the outside temperature of the exhaust manifold, in particular also compared to exhaust manifolds made entirely of cast iron. As a result, less expensive thermal insulation of adjacent components is required, which results in cost savings at this point, which at least partially offset the increased manufacturing costs of the exhaust manifold according to the invention.
  • the cladding tubes are part of a common, in particular double-shell housing, which at the same time receives the gas deflecting element.
  • the exhaust manifold becomes very compact overall and consists of relatively few individual elements.
  • the gas deflection element is also air-gap insulated and thus thermally decoupled. This also makes additional seals unnecessary.
  • the pipes and the gas deflecting element are matched to one another with regard to their thermal expansion properties. This ensures that the high accuracy of fit of all parts is maintained even during operation. The gas leak in the air gap and thus the heat radiation to the outside remain small.
  • the exhaust manifold shown in Fig. 1 comprises an engine-side flange 1 with four exhaust gas passage openings 2 and a plurality of bushings 3 for fastening screws for attaching the exhaust manifold to an engine.
  • An exhaust pipe 4 made of sheet steel is connected to the exhaust gas passage openings 2 and welded to the engine-side flange 1.
  • the outlet openings 5 of the exhaust pipes 4 open into a gas deflection element 6, not shown in FIG. 1, the design of which can be seen in FIGS. 2 and 3.
  • the exhaust pipes 4 and the gas deflection element 6 are surrounded by a two-part, common housing 7 with the formation of an air gap 8, which is welded gas-tight to the motor-side flange 1.
  • the housing 7, which surrounds the pipes 4 and the gas deflecting element 6, can also be designed such that it can be welded to the motor-side flange 1 with a circumferential welding line.
  • the gas deflecting element 6 shown in FIGS. 2 and 3 consists of precision cast steel, but can also be produced as a forged part, then preferably in two parts. In the present example, it has four inlet openings 9 for the gas outlet-side ends of the exhaust gas pipes 4, which point outwards in a star shape, this plane coinciding with the plane into which the gas passage openings 2 point.
  • the gas inlet openings 9 of the gas deflecting element 6 are connected via exhaust channels 14 to a gas outlet opening 10 which points in a direction at least approximately perpendicular to the gas inlet direction.
  • the area of the gas outlet opening 10 of the gas deflecting element 6 is designed as a connecting flange 11 for connecting a turbocharger.
  • the deflection wall 12 is pulled down into the area of the outlet opening 10 so that there is no direct connection between the gas inlet openings 9.
  • an air gap 8 is also present between the gas deflecting element 6 and the housing 7.
  • Fig. 2 shows that the gas deflection element 6 also has bushings 13 for fastening bolts through which a turbocharger can be fastened to the exhaust manifold.
  • the gas inlet openings 9 of the gas deflecting element are laterally offset from these passages 13, and the gas flows run around these recesses 13.
  • the exhaust manifold according to the invention is characterized by a very compact, space-saving design.
  • the exhaust manifold is very flat and runs practically in a plane immediately in front of the gas passage openings 2 of the engine-side flange 1.
  • the exhaust manifold can be designed so flat that straight access to the bushings 3 remains free for the flange attachment.
  • the total weight of the exhaust manifold is significantly reduced compared to exhaust manifolds made entirely of cast iron. A weight reduction of 40% can be achieved. Due to the air gap-insulated design of the exhaust manifold with a common housing 7 around the pipes 4 and the deflection element 6, the heat radiation is also significantly lower than in conventional cast metal exhaust manifolds. This can save costs in the thermal insulation of surrounding components.
  • the use of investment casting for the gas deflecting element 6 and a hydrostatic forming process for the tubes 4 ensures a high degree of dimensional accuracy, in particular in the region of the sliding fit of the tubes 4 in the gas inlet openings 9 of the gas deflecting element 6. A gas leakage into the air gap 8 is thereby largely prevented, so that the heating of the exhaust manifold is kept low.
  • the exhaust pipes 4 are each guided separately and welded at one end to the engine-side flange 1. You only have to carry yourself.
  • the gas deflecting element 6, on the other hand is like the one connected to it Exhaust gas turbocharger carried by the housing 7, which is also welded to the engine-side flange 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Supercharger (AREA)

Abstract

The exhaust gas lines comprise pipes(4) made of metal, and especially steel sheet, and at least one gas deflection element(6) separate from it and located in the region of the flange on the gas outlet side, and made from cast or forged metal. The pipes by one end are connected to the flange(1) on the engine side and by their other end are connected to the gas deflection element. The gas deflection element is constructed from a precision casting, especially with a wall thickness of about 2 millimetres.

Description

Die vorliegende Erfindung betrifft einen Abgaskrümmer, insbesondere für turbogeladene Verbrennungsmotoren, mit mehreren zwischen einem ersten, motorseitigen Flansch und einem zweiten, gasaustrittsseitigen Flansch verlaufenden, im Bereich des zweiten Flansches eine starke Krümmung, insbesondere im Bereich von ca. 90°, aufweisenden Abgasleitungen.The present invention relates to an exhaust manifold, in particular for turbocharged internal combustion engines, with a plurality of exhaust pipes which run between a first flange on the engine side and a second flange on the gas outlet side and have a strong curvature in the region of the second flange, in particular in the region of approximately 90 °.

Bekannte Abgaskrümmer für Turbomotoren werden aus Gußmaterial hergestellt, da nur so die engen Krümmungsradien verwirklicht werden können, die zur Anordnung des Turboladers in unmittelbarer Nähe des Zylinderflansches erforderlich sind. Aus Stahlblech gefertigte Abgaskrümmer, wie sie für nicht aufgeladene Motoren verwendet werden, sind bei turbogeladenen Motoren nicht einsetzbar, da die Stahlblechrohre nicht mit einem so geringen Krümmungsradius gefertigt werden können, wie es erforderlich wäre.Known exhaust manifolds for turbo engines are made of cast material, since this is the only way to achieve the tight radii of curvature that are required to arrange the turbocharger in the immediate vicinity of the cylinder flange. Exhaust manifolds made of sheet steel, such as those used for uncharged engines, cannot be used with turbocharged engines, since the sheet steel pipes cannot be manufactured with the small radius of curvature that would be required.

Abgaskrümmer aus Gußmaterial haben aber gegenüber Abgaskrümmern aus Stahlblech ein erheblich höheres Gewicht, da die Wandstärke gegenüber diesen vergleichsweise groß ist.Exhaust manifolds made of cast material have a considerably higher weight than exhaust manifolds made of sheet steel, since the wall thickness is comparatively large compared to these.

Der Erfindung liegt die Aufgabe zugrunde, einen Abgaskrümmer der eingangs genannten Art anzugeben, der diese Nachteile nicht aufweist. Insbesondere soll ein Abgaskrümmer angegeben werden, der trotz geringem Gewicht sehr kleine Krümmungsradien ermöglicht und damit für Turbomotoren einsetzbar ist.The invention has for its object to provide an exhaust manifold of the type mentioned, which does not have these disadvantages. Especially an exhaust manifold is to be specified which, despite its low weight, enables very small radii of curvature and can therefore be used for turbo engines.

Diese Aufgabe wird dadurch gelöst, daß die Abgasleitungen Rohre aus Metall-, insbesondere Stahlblech und mindestens ein von diesen separates, im Bereich des zweiten Flansches angeordnetes Gasumlenkelement aus Guß- oder Schmiedemetall, insbesondere -stahl mit Abgaskanälen umfassen, wobei die Rohre mit ihrem einen Ende an den ersten Flansch und mit ihrem anderen Ende an das Gasumlenkelement angeschlossen sind.This object is achieved in that the exhaust pipes comprise pipes made of sheet metal, in particular sheet steel, and at least one gas deflecting element made of cast or forged metal, in particular steel, arranged in the region of the second flange, in particular steel, with exhaust gas passages, the pipes having one end are connected to the first flange and with their other end to the gas deflecting element.

Der Erfindungsgedanke besteht also darin, den Abgaskrümmer aus zwei verschiedenen Materialien aufzubauen, nämlich zum einen aus gewichtssparenden Rohren aus Metallblech und zum anderen aus einem Gasumlenkelement aus Gußmetall. Gußmetall wird also nur für den Bereich des Abgaskrümmers eingesetzt, in dem die starke Krümmung der Abgasleitungen erforderlich ist, also in der Nähe des gasaustrittsseitigen Flansches.The idea of the invention is therefore to construct the exhaust manifold from two different materials, namely firstly from weight-saving pipes made from sheet metal and secondly from a gas deflecting element made from cast metal. Cast metal is therefore only used for the area of the exhaust manifold in which the strong curvature of the exhaust pipes is required, ie in the vicinity of the flange on the gas outlet side.

Durch diese Ausgestaltung des erfindungsgemäßen Abgaskrümmers kann das Gesamtgewicht des Abgaskrümmers reduziert werden. Die Herstellkosten werden gegenüber einem Gußkrümmer zwar erhöht. Heutzutage hat aber die Gewichtsreduzierung, insbesondere im Motorbereich, einen sehr hohen Stellenwert, so daß die Kostenzunahme vertretbar erscheint. Darüber hinaus kann die Kostenzunahme durch die Gewichtsvorteile zumindest teilweise ausgeglichen werden.The overall weight of the exhaust manifold can be reduced by this configuration of the exhaust manifold according to the invention. The manufacturing costs are increased compared to a cast manifold. Nowadays, however, weight reduction, especially in the engine area, is very important, so that the cost increase seems justifiable. In addition, the increase in costs can be at least partially offset by the weight advantages.

Insbesondere ergibt sich durch die erfindungsgemäße Ausgestaltung die Möglichkeit, den Abgaskrümmer so flach zu gestalten, daß der Abgaskrümmer ohne Überstand über den Zylinderflansch vor dessen Austrittsöffnungen angeordnet werden kann. Dabei kann sogar ein gerader Zugang zu allen Zylinderflanschschraubanschlüssen freigehalten werden. Ein weiterer Vorteil besteht darin, daß die gasführenden Rohre eine sehr geringe Masse aufweisen und außerdem mit einer wärmeisolierenden Außenschale versehen werden können. Dadurch erwärmt sich der Katalysator schneller und erreicht seine Wirksamkeit früher.In particular, the configuration according to the invention gives the possibility of making the exhaust manifold so flat that the exhaust manifold can be arranged in front of its outlet openings without protruding beyond the cylinder flange. Even straight access to all cylinder flange screw connections can be kept free. Another advantage is that the gas-carrying pipes have a very low mass and can also be provided with a heat-insulating outer shell. As a result, the catalytic converter heats up faster and reaches its effectiveness earlier.

Nach einer Ausgestaltung der Erfindung ist das Gasumlenkelement aus Feinguß, insbesondere mit einer Wandstärke von ca. 2 mm, gebildet. Damit läßt sich das Gewicht des erfindungsgemäßen Abgaskrümmers vorteilhafterweise weiter reduzieren.According to one embodiment of the invention, the gas deflecting element is made of investment casting, in particular with a wall thickness of approximately 2 mm. The weight of the exhaust manifold according to the invention can thus advantageously be reduced further.

Nach einer weiteren Ausgestaltung der Erfindung ist ein gemeinsames Gasumlenkelement für alle Rohre vorgesehen. Der konstruktive Aufbau und die Herstellung des Abgaskrümmers werden dadurch vereinfacht, wodurch die Kosten gesenkt werden. Bevorzugt weist das Gasumlenkelement dabei sternförmig nach außen weisende Anschlußöffnungen für die Rohre auf sowie eine hierzu annähernd senkrecht nach unten weisende Auslaßöffnung, die über die Abgaskanäle mit den Gaseintrittsöffnungen verbunden ist. Hierdurch ergibt sich eine optimale Anschlußmöglichkeit für die vom Zylinderflansch kommenden Rohre sowie den Turbolader in unmittelbarer Nachbarschaft zum Zylinderflansch.According to a further embodiment of the invention, a common gas deflecting element is provided for all pipes. This simplifies the design and manufacture of the exhaust manifold, thereby reducing costs. The gas deflection element preferably has star-shaped outward-facing connection openings for the pipes and an outlet opening which is approximately perpendicularly downward and is connected to the gas inlet openings via the exhaust gas channels. This results in an optimal connection possibility for the pipes coming from the cylinder flange and the turbocharger in the immediate vicinity of the cylinder flange.

Nach einer weiteren Ausgestaltung der Erfindung bildet die Auslaßseite des Gasumlenkelements den zweiten Flansch. Das Gasumlenkelement erhält dadurch neben der Umlenk- und der Sammelfunktion eine dritte Funktion. Dies ist platz- und kostensparend.According to a further embodiment of the invention, the outlet side of the gas deflecting element forms the second flange. The gas deflecting element receives thereby a third function in addition to the redirection and collection function. This is space and cost saving.

Nach einer weiteren Ausgestaltung der Erfindung weist das Gasumlenkelement Mittel zur Befestigung eines Turboladers, insbesondere Durchführungen für Befestigungsbolzen, auf. Das Gasumlenkelement erhält hierdurch eine weitere Funktion, und der Turbolader kann ebenfalls platz- und kostensparend am Abgaskrümmer angebracht werden.According to a further embodiment of the invention, the gas deflection element has means for fastening a turbocharger, in particular bushings for fastening bolts. This gives the gas deflection element another function, and the turbocharger can also be attached to the exhaust manifold in a space-saving and cost-saving manner.

Bevorzugt ist es, wenn die Rohre jeweils direkt an das Gasumlenkelement angeschlossen sind, also unabhängig voneinander verlaufen. Die Rohre sind dadurch einfach herstellbar. Außerdem können Wärmeausdehnungen besser verteilt werden. Die voneinander unabhängig verlaufende Rohre haben zudem den Vorteil, daß sie nur sich selbst tragen müssen, was aufgrund der verhältnismäßig geringen Trageigenschaften heißer Blechrohre wichtig ist.It is preferred if the tubes are each connected directly to the gas deflecting element, that is to say run independently of one another. This makes the pipes easy to manufacture. In addition, thermal expansion can be better distributed. The mutually independent pipes also have the advantage that they only have to carry themselves, which is important because of the relatively low carrying properties of hot sheet metal pipes.

Nach einer weiteren Ausgestaltung der Erfindung sind die Rohre mit Schiebesitz an das Gasumlenkelement angeschlossen. Das Verhalten der Rohre bei Wärmedehnung wird hierdurch weiter verbessert.According to a further embodiment of the invention, the tubes with a sliding seat are connected to the gas deflecting element. This further improves the behavior of the pipes under thermal expansion.

Nach einer weiteren Ausgestaltung der Erfindung sind die Rohre unter Verwendung eines hydrostatischen Umformverfahrens hergestellt. Dieses Verfahren ermöglicht eine Herstellung der Rohre mit beliebiger Krümmung und hoher Maßgenauigkeit. Da das Umlenkelement als Feingußteil ebenfalls mit hoher Maßgenauigkeit gefertigt werden kann, ergibt sich insgesamt eine hohe Maßgenauigkeit der Abgasleitungen. Dies ist insbesondere im Bereich des Schiebesitzes zwischen Rohren und Gasumlenkelement wichtig, um an dieser Stelle eine maximale Dichtigkeit zu erhalten. Auch der Eintritt von Verunreinigungen, die zu einer Beschädigung des Turboladers führen könnten, wird weitgehend verhindert, da keine Abstützelemente erforderlich sind.According to a further embodiment of the invention, the tubes are manufactured using a hydrostatic forming process. This process enables the pipes to be produced with any curvature and high dimensional accuracy. Since the deflection element can also be manufactured as an investment casting with a high degree of dimensional accuracy, there is a high overall dimensional accuracy of the exhaust pipes. This is particularly true in the area of the sliding seat between the pipes and the gas deflecting element important to obtain maximum tightness at this point. The entry of impurities, which could damage the turbocharger, is largely prevented, since no support elements are required.

Nach einer weiteren Ausgestaltung der Erfindung sind die Rohre jeweils unter Ausbildung eines Luftspalts von einem Hüllrohr aus Metall, insbesondere Stahlblech, umgeben. Durch diese Luftspaltisolierung wird die Außentemperatur des Abgaskrümmers vorteilhafterweise verringert, insbesondere auch gegenüber vollständig aus Guß hergestellten Abgaskrümmern. Hierdurch ist eine weniger aufwendige Wärmeisolierung benachbarter Bauelemente erforderlich, wodurch sich an dieser Stelle Kosteneinsparungen ergeben, die die erhöhten Herstellungskosten des erfindungsgemäßen Abgaskrümmers zumindest zum Teil auffangen.According to a further embodiment of the invention, the tubes are each surrounded by a cladding tube made of metal, in particular sheet steel, with the formation of an air gap. This air gap insulation advantageously reduces the outside temperature of the exhaust manifold, in particular also compared to exhaust manifolds made entirely of cast iron. As a result, less expensive thermal insulation of adjacent components is required, which results in cost savings at this point, which at least partially offset the increased manufacturing costs of the exhaust manifold according to the invention.

Bevorzugt ist es, wenn die Hüllrohre Teil eines gemeinsamen, insbesondere zweischaligen Gehäuses sind, welches zugleich das Gasumlenkelement aufnimmt. Der Abgaskrümmer wird hierdurch insgesamt sehr kompakt und besteht aus verhältnismäßig wenig Einzelelementen. Mit einem einzigen Gehäuse wird so auch das Gasumlenkelement luftspaltisoliert und damit thermisch abgekoppelt. Auch werden hierdurch zusätzliche Abdichtungen entbehrlich.It is preferred if the cladding tubes are part of a common, in particular double-shell housing, which at the same time receives the gas deflecting element. As a result, the exhaust manifold becomes very compact overall and consists of relatively few individual elements. With a single housing, the gas deflection element is also air-gap insulated and thus thermally decoupled. This also makes additional seals unnecessary.

Nach einer weiteren Ausgestaltung der Erfindung sind die Rohre und das Gasumlenkelement hinsichtlich ihrer thermischen Ausdehnungseigenschaften aufeinander abgestimmt. Dies gewährleistet, daß die hohe Paßgenauigkeit aller Teile auch im Betrieb erhalten bleibt. Der Gasaustritt in den Luftspalt und damit die Wärmeabstrahlung nach außen bleiben gering.According to a further embodiment of the invention, the pipes and the gas deflecting element are matched to one another with regard to their thermal expansion properties. This ensures that the high accuracy of fit of all parts is maintained even during operation. The gas leak in the air gap and thus the heat radiation to the outside remain small.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachfolgend beschrieben. Es zeigen, jeweils in schematischer Darstellung,

Fig. 1
eine Draufsicht auf einen erfindungsgemäßen Abgaskrümmer,
Fig. 2
einen Schnitt durch einen erfindungsgemäßen Abgaskrümmer gemäß Linie II-II in Fig. 1, und
Fig. 3
einen Teilschnitt gemäß Linie III-III in Fig. 2.
Embodiments of the invention are shown in the drawing and are described below. They show, each in a schematic representation,
Fig. 1
a plan view of an exhaust manifold according to the invention,
Fig. 2
a section through an exhaust manifold according to the invention according to line II-II in Fig. 1, and
Fig. 3
a partial section along line III-III in Fig. 2nd

Der in Fig. 1 dargestellte Abgaskrümmer umfaßt einen motorseitigen Flansch 1 mit vier Abgasdurchtrittsöffnungen 2 und mehreren Durchführungen 3 für Befestigungsschrauben zum Anbringen des Abgaskrümmers an einem Motor. An die Abgasdurchtrittsöffnungen 2 ist jeweils ein Abgasrohr 4 aus Stahlblech angeschlossen und mit dem motorseitigen Flansch 1 verschweißt. Die Austrittsöffnungen 5 der Abgasrohre 4 münden in ein in Fig. 1 nicht dargestelltes Gasumlenkelement 6, dessen Ausgestaltung den Fig. 2 und 3 entnehmbar ist. Die Abgasrohre 4 und das Gasumlenkelement 6 sind von einem zweiteiligen, gemeinsamen Gehäuse 7 unter Ausbildung eines Luftspalts 8 umgeben, welches gasdicht mit dem motorseitigen Flansch 1 verschweißt ist. Anders als in Fig. 1 dargestellt, kann das Gehäuse 7, welches die Rohre 4 und das Gasumlenkelement 6 umgibt, auch so ausgebildet sein, daß es mit einer umlaufenden Schweißlinie am motorseitigen Flansch 1 angeschweißt werden kann.The exhaust manifold shown in Fig. 1 comprises an engine-side flange 1 with four exhaust gas passage openings 2 and a plurality of bushings 3 for fastening screws for attaching the exhaust manifold to an engine. An exhaust pipe 4 made of sheet steel is connected to the exhaust gas passage openings 2 and welded to the engine-side flange 1. The outlet openings 5 of the exhaust pipes 4 open into a gas deflection element 6, not shown in FIG. 1, the design of which can be seen in FIGS. 2 and 3. The exhaust pipes 4 and the gas deflection element 6 are surrounded by a two-part, common housing 7 with the formation of an air gap 8, which is welded gas-tight to the motor-side flange 1. Unlike shown in FIG. 1, the housing 7, which surrounds the pipes 4 and the gas deflecting element 6, can also be designed such that it can be welded to the motor-side flange 1 with a circumferential welding line.

Das in den Fig. 2 und 3 dargestellte Gasumlenkelement 6 besteht aus Feingußstahl, kann aber auch als Schmiedeteil, dann bevorzugt zweiteilig, hergestellt werden. Es weist im vorliegenden Beispiel vier Eintrittsöffnungen 9 für die gasaustrittsseitigen Enden der Abgasrohre 4 auf, die in einer Ebene sternförmig nach außen weisen, wobei diese Ebene mit der Ebene übereinstimmt, in welche die Gasdurchtrittsöffnungen 2 weisen.The gas deflecting element 6 shown in FIGS. 2 and 3 consists of precision cast steel, but can also be produced as a forged part, then preferably in two parts. In the present example, it has four inlet openings 9 for the gas outlet-side ends of the exhaust gas pipes 4, which point outwards in a star shape, this plane coinciding with the plane into which the gas passage openings 2 point.

Die Gaseintrittsöffnungen 9 des Gasumlenkelements 6 sind über Abgaskanäle 14 mit einer Gasaustrittsöffnung 10 verbunden, die in eine zu der Gaseintrittsrichtung zumindest annähernd senkrechte Richtung weist. Der Bereich der Gasaustrittsöffnung 10 des Gasumlenkelements 6 ist als Anschlußflansch 11 zum Anschluß eines Turboladers ausgebildet. Zwischen den Gaseintrittsöffnungen 9 ist in dem Gasumlenkelement 6 eine in Richtung auf die Gasaustrittsöffnung 10 nach unten gezogene Gasumlenkwand 12 vorhanden. Die Umlenkwand 12 ist dabei bis in den Bereich der Austrittsöffnung 10 herabgezogen, so daß keine direkte Verbindung zwischen den Gaseintrittsöffnungen 9 gegeben ist.The gas inlet openings 9 of the gas deflecting element 6 are connected via exhaust channels 14 to a gas outlet opening 10 which points in a direction at least approximately perpendicular to the gas inlet direction. The area of the gas outlet opening 10 of the gas deflecting element 6 is designed as a connecting flange 11 for connecting a turbocharger. Between the gas inlet openings 9 there is a gas deflection wall 12 which is drawn downwards in the direction of the gas outlet opening 10 in the gas deflection element 6. The deflection wall 12 is pulled down into the area of the outlet opening 10 so that there is no direct connection between the gas inlet openings 9.

Wie man in Fig. 3 erkennt, ist auch zwischen dem Gasumlenkelement 6 und dem Gehäuse 7 ein Luftspalt 8 vorhanden. Fig. 2 zeigt, daß das Gasumlenkelement 6 außerdem Durchführungen 13 für Befestigungsbolzen aufweist, durch welche ein Turbolader am Abgaskrümmer befestigt werden kann. Entsprechend sind die Gaseintrittsöffnungen 9 des Gasumlenkelements seitlich versetzt zu diesen Durchführungen 13 vorgesehen, und verlaufen die Gasströme um diese Ausnehmungen 13 herum.As can be seen in FIG. 3, an air gap 8 is also present between the gas deflecting element 6 and the housing 7. Fig. 2 shows that the gas deflection element 6 also has bushings 13 for fastening bolts through which a turbocharger can be fastened to the exhaust manifold. Correspondingly, the gas inlet openings 9 of the gas deflecting element are laterally offset from these passages 13, and the gas flows run around these recesses 13.

Der erfindungsgemäße Abgaskrümmer zeichnet sich durch eine sehr kompakte, platzsparende Bauweise aus. Insbesondere ist der Abgaskrümmer sehr flach ausgebildet und verläuft praktisch in einer Ebene unmittelbar vor den Gasdurchtrittsöffnungen 2 des motorseitigen Flansches 1. Dabei kann der Abgaskrümmer so flach ausgebildet sein, daß ein gerader Zugang zu den Durchführungen 3 für die Flanschbefestigung frei bleibt.The exhaust manifold according to the invention is characterized by a very compact, space-saving design. In particular, the exhaust manifold is very flat and runs practically in a plane immediately in front of the gas passage openings 2 of the engine-side flange 1. The exhaust manifold can be designed so flat that straight access to the bushings 3 remains free for the flange attachment.

Durch die Verwendung von Rohren 4 aus Edelstahlblech oder hitzebeständigem Blech und von Feinguß lediglich für das Gasumlenkelement 6 ist das Gesamtgewicht des Abgaskrümmers gegenüber vollständig aus Guß hergestellten Abgaskrümmern deutlich verringert. Eine Gewichtsreduzierung in der Größe von 40 % kann erreicht werden. Durch die luftspaltisolierte Ausbildung des Abgaskrümmers mit einem gemeinsamen Gehäuse 7 um die Rohre 4 und das Umlenkelement 6 ist die Wärmeabstrahlung ebenfalls deutlich geringer als bei herkömmlichen Gußmetallabgaskrümmern. Dadurch können bei der Wärmeisolierung umgebender Bauteile Kosten eingespart werden.By using pipes 4 made of stainless steel sheet or heat-resistant sheet metal and investment casting only for the gas deflecting element 6, the total weight of the exhaust manifold is significantly reduced compared to exhaust manifolds made entirely of cast iron. A weight reduction of 40% can be achieved. Due to the air gap-insulated design of the exhaust manifold with a common housing 7 around the pipes 4 and the deflection element 6, the heat radiation is also significantly lower than in conventional cast metal exhaust manifolds. This can save costs in the thermal insulation of surrounding components.

Die Verwendung von Feinguß für das Gasumlenkelement 6 und eines hydrostatischen Umformverfahrens für die Rohre 4 gewährleistet eine hohe Maßgenauigkeit, insbesondere im Bereich des Schiebesitzes der Rohre 4 in den Gaseintrittsöffnungen 9 des Gasumlenkelements 6. Ein Gasaustritt in den Luftspalt 8 wird hierdurch weitgehend unterbunden, so daß die Erwärmung des Abgaskrümmers gering gehalten wird. Die Abgasrohre 4 sind jeweils separat geführt und mit ihrem einen Ende am motorseitigen Flansch 1 angeschweißt. Sie müssen daher nur sich selbst tragen. Das Gasumlenkelement 6 wird dagegen, ebenso wie der daran angeschlossene Abgasturbolader vom Gehäuse 7 getragen, welches ebenfalls am motorseitigen Flansch 1 angeschweißt ist.The use of investment casting for the gas deflecting element 6 and a hydrostatic forming process for the tubes 4 ensures a high degree of dimensional accuracy, in particular in the region of the sliding fit of the tubes 4 in the gas inlet openings 9 of the gas deflecting element 6. A gas leakage into the air gap 8 is thereby largely prevented, so that the heating of the exhaust manifold is kept low. The exhaust pipes 4 are each guided separately and welded at one end to the engine-side flange 1. You only have to carry yourself. The gas deflecting element 6, on the other hand, is like the one connected to it Exhaust gas turbocharger carried by the housing 7, which is also welded to the engine-side flange 1.

Insgesamt ergibt sich hierdurch ein konstruktiv unaufwendiger, vergleichsweise sehr leichter Abgaskrümmer mit geringer Wärmeabstrahlung, der zudem kostengünstig herstellbar ist und trotz Verwendung von Blechrohren 4 einen kleinen Krümmungsradius der Abgasleitungen im Bereich des gasaustrittsseitigen Flansches 11 erlaubt, um einen Turbolader in unmittelbarer Nachbarschaft zum motorseitigen Flansch 1 anordnen zu können.Overall, this results in a structurally complex, comparatively very light exhaust manifold with low heat radiation, which is also inexpensive to produce and, despite the use of sheet metal tubes 4, allows a small radius of curvature of the exhaust pipes in the region of the gas outlet-side flange 11, around a turbocharger in the immediate vicinity of the engine-side flange 1 to be able to order.

BezugszeichenlisteReference list

11
motorseitiger Flanschflange on the motor side
22nd
GasdurchtrittsöffnungGas passage opening
33rd
SchraubendurchführungScrew bushing
44th
AbgasrohrExhaust pipe
55
Austrittsöffnung von 4Outlet opening of 4
66
GasumlenkelementGas deflecting element
77
Gehäusecasing
88th
LuftspaltAir gap
99
GaseintrittsöffnungGas inlet opening
1010th
GasaustrittsöffnungGas outlet opening
1111
gasaustrittsseitiger Flanschflange on the gas outlet side
1212th
UmlenkwandBaffle
1313
AusnehmungRecess
1414
AbgaskanalExhaust duct

Claims (12)

Abgaskrümmer, insbesondere für turbogeladene Verbrennungsmotoren mit mehreren zwischen einem ersten, motorseitigen Flansch (1) und einem zweiten, gasaustrittsseitigen Flansch (11) verlaufenden, im Bereich des zweiten Flansches (11) eine starke Krümmung, insbesondere im Bereich von ca. 90°, aufweisenden Abgasleitungen (4, 14),
dadurch gekennzeichnet,
daß die Abgasleitungen Rohre (4) aus Metall-, insbesondere Stahlblech und mindestens ein von diesen separates, im Bereich des zweiten Flansches (11) angeordnetes Gasumlenkelement (6) aus Guß- oder Schmiedemetall, insbesondere -stahl mit Abgaskanälen (14) umfassen, wobei die Rohre (4) mit ihrem einen Ende an den ersten Flansch (1) und mit ihrem anderen Ende an das Gasumlenkelement (6) angeschlossen sind.Exhaust manifold, in particular for turbocharged internal combustion engines with several between a first flange (1) on the engine side and a second flange (11) on the gas outlet side, which has a strong curvature in the region of the second flange (11), in particular in the region of approximately 90 ° Exhaust pipes (4, 14),
characterized by
that the exhaust pipes include pipes (4) made of sheet metal, in particular sheet steel, and at least one gas deflecting element (6) made of cast or forged metal, in particular steel, with exhaust gas channels (14) arranged in the region of the second flange (11), whereby the pipes (4) are connected at one end to the first flange (1) and at the other end to the gas deflecting element (6). Abgaskrümmer nach Anspruch 1,
dadurch gekennzeichnet,
daß das Gasumlenkelement (6) aus Feinguß, insbesondere mit einer Wandstärke von ca. 2 mm, gebildet ist.Exhaust manifold according to claim 1,
characterized by
that the gas deflecting element (6) is made of investment casting, in particular with a wall thickness of approximately 2 mm. Abgaskrümmer nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß ein gemeinsames Gasumlenkelement (6) für alle Rohre (4) vorgesehen ist.Exhaust manifold according to claim 1 or 2,
characterized by
that a common gas deflecting element (6) is provided for all pipes (4). Abgaskrümmer nach Anspruch 3,
dadurch gekennzeichnet,
daß das Gasumlenkelement (6) sternförmig nach außen weisende Gaseintrittsöffnungen (9) zum Anschluß der Rohre (4) aufweist sowie eine hierzu annähernd senkrecht nach unten weisende Gasaustrittsöffnung (10), die über die Abgaskanäle (14) mit den Gaseintrittsöffnungen (9) verbunden ist.Exhaust manifold according to claim 3,
characterized by
that the gas deflecting element (6) has star-shaped outward gas inlet openings (9) for connecting the pipes (4) and an approximately perpendicular downward gas outlet opening (10) which is connected to the gas inlet openings (9) via the exhaust gas channels (14) . Abgaskrümmer nach Anspruch 3 oder 4,
dadurch gekennzeichnet,
daß die Gasaustrittsseite des Gasumlenkelements (6) den zweiten Flansch (11) bildet.Exhaust manifold according to claim 3 or 4,
characterized by
that the gas outlet side of the gas deflecting element (6) forms the second flange (11). Abgaskrümmer nach einem der Ansprüche 3 bis 5,
dadurch gekennzeichnet,
daß das Gasumlenkelement (6) Mittel zur Befestigung eines Turboladers, insbesondere Durchführungen (13) für Befestigungsbolzen, aufweist.Exhaust manifold according to one of claims 3 to 5,
characterized by
that the gas deflecting element (6) has means for fastening a turbocharger, in particular bushings (13) for fastening bolts. Abgaskrümmer nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Rohre (4) jeweils direkt an das Gasumlenkelement (6) angeschlossen sind.Exhaust manifold according to one of the preceding claims,
characterized by
that the tubes (4) are each directly connected to the gas deflecting element (6). Abgaskrümmer nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Rohre (4) mit Schiebesitz an das Gasumlenkelement (6) angeschlossen sind.Exhaust manifold according to one of the preceding claims,
characterized by
that the tubes (4) are connected to the gas deflecting element (6) with a sliding fit. Abgaskrümmer nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Rohre (4) unter Verwendung eines hydrostatischen Umformverfahrens hergestellt sind.Exhaust manifold according to one of the preceding claims,
characterized by
that the tubes (4) are manufactured using a hydrostatic forming process. Abgaskrümmer nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Rohre (4) jeweils unter Ausbildung eines Luftspaltes (8) von einem Hüllrohr (7) aus Metall-, insbesondere Stahlblech, umgeben sind.Exhaust manifold according to one of the preceding claims,
characterized by
that the tubes (4) are each surrounded by a cladding tube (7) made of sheet metal, in particular steel sheet, forming an air gap (8). Abgaskrümmer nach Anspruch 10,
dadurch gekennzeichnet,
daß die Hüllrohre Teil eines gemeinsamen, insbesondere zweischaligen Gehäuses (7) sind, welches zugleich das Gasumlenkelement (6), bevorzugt ebenfalls unter Ausbildung eines Luftspaltes (8), aufnimmt.Exhaust manifold according to claim 10,
characterized by
that the cladding tubes are part of a common, in particular double-shell housing (7) which at the same time accommodates the gas deflecting element (6), preferably also with the formation of an air gap (8). Abgaskrümmer nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Rohre (4) und das Gasumlenkelement (6) hinsichtlich ihrer thermischen Ausdehnungseigenschaften aufeinander abgestimmt sind.Exhaust manifold according to one of the preceding claims,
characterized by
that the tubes (4) and the gas deflecting element (6) are matched to one another with regard to their thermal expansion properties.
EP99108095A 1998-05-05 1999-04-23 Exhaust manifold Withdrawn EP0955453A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998119946 DE19819946A1 (en) 1998-05-05 1998-05-05 Exhaust manifold
DE19819946 1998-05-05

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EP0955453A3 EP0955453A3 (en) 2003-05-21

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DE10112707C1 (en) * 2001-03-16 2002-06-06 Zeuna Staerker Kg Exhaust manifold production, for internal combustion motor, is composed of an inner and outer shell each of part-shells joined together with a gas-tight seam without welding sprays
EP1225314A3 (en) * 2001-01-20 2003-09-24 Bayerische Motoren Werke Aktiengesellschaft Exhaust manifold for flue gas discharge out of an internal combustion engine
EP1359294A1 (en) * 2002-04-30 2003-11-05 Zeuna-Stärker Gmbh & Co Kg Double shell, air insulated exhaust gas junction and method for its production
EP1367234A1 (en) * 2002-05-28 2003-12-03 Benteler Automobiltechnik GmbH Double wall exhaust pipe with flange
US6688103B2 (en) 2001-06-21 2004-02-10 Dr. Ing. H.C.F. Porsche Ag Apparatus for fastening an exhaust gas turbocharger on an exhaust chamber of a combustion engine
FR2849469A1 (en) * 2002-12-27 2004-07-02 Renault Sa Exhaust manifold for motor vehicle internal combustion engine has single support inlet forming rigid connection between turbocompressor and head
FR2863306A1 (en) * 2003-12-04 2005-06-10 Renault Sas Exhaust manifold for internal combustion engine, has main body with intermediate wall comprising reflector to channelize exhaust gas flow provided from inlet orifices to outlet orifice oppositely arranged to wall
DE10346552A1 (en) * 2003-10-07 2005-06-30 Friedrich Boysen Gmbh & Co. Kg Luftspaltkrümmer
EP1691049A1 (en) * 2005-01-18 2006-08-16 Bayerische Motorenwerke Aktiengesellschaft Double-walled exhaus gas manifold
EP1734235A1 (en) * 2005-06-13 2006-12-20 Wescast Industries, Inc. Exhaust components including high temperature divider plate assemblies
EP1985820A1 (en) * 2006-02-17 2008-10-29 Hitachi Metals, Ltd. Heat-resistant cast steel exhaust manifold
US20100005798A1 (en) * 2008-07-08 2010-01-14 J. Eberspaecher Gmbh & Co. Kg Exhaust System
FR2947301A1 (en) * 2009-06-26 2010-12-31 Inst Francais Du Petrole Exhaust manifold for in-line four cylinder internal combustion engine, has body whose portion includes section with mechanical resistance higher than mechanical resistance of remaining part of body for assembling turbocompressor
EP2921669A1 (en) * 2014-03-20 2015-09-23 Benteler Automobiltechnik GmbH Exhaust manifold for an exhaust system of a combustion engine

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EP1225314A3 (en) * 2001-01-20 2003-09-24 Bayerische Motoren Werke Aktiengesellschaft Exhaust manifold for flue gas discharge out of an internal combustion engine
DE10112707C1 (en) * 2001-03-16 2002-06-06 Zeuna Staerker Kg Exhaust manifold production, for internal combustion motor, is composed of an inner and outer shell each of part-shells joined together with a gas-tight seam without welding sprays
US6688103B2 (en) 2001-06-21 2004-02-10 Dr. Ing. H.C.F. Porsche Ag Apparatus for fastening an exhaust gas turbocharger on an exhaust chamber of a combustion engine
EP1359294A1 (en) * 2002-04-30 2003-11-05 Zeuna-Stärker Gmbh & Co Kg Double shell, air insulated exhaust gas junction and method for its production
EP1367234A1 (en) * 2002-05-28 2003-12-03 Benteler Automobiltechnik GmbH Double wall exhaust pipe with flange
FR2849469A1 (en) * 2002-12-27 2004-07-02 Renault Sa Exhaust manifold for motor vehicle internal combustion engine has single support inlet forming rigid connection between turbocompressor and head
DE10346552A1 (en) * 2003-10-07 2005-06-30 Friedrich Boysen Gmbh & Co. Kg Luftspaltkrümmer
FR2863306A1 (en) * 2003-12-04 2005-06-10 Renault Sas Exhaust manifold for internal combustion engine, has main body with intermediate wall comprising reflector to channelize exhaust gas flow provided from inlet orifices to outlet orifice oppositely arranged to wall
EP1691049A1 (en) * 2005-01-18 2006-08-16 Bayerische Motorenwerke Aktiengesellschaft Double-walled exhaus gas manifold
US7565800B2 (en) 2005-06-13 2009-07-28 Wescast Industries, Inc. Exhaust components including high temperature divider plate assemblies
EP1734235A1 (en) * 2005-06-13 2006-12-20 Wescast Industries, Inc. Exhaust components including high temperature divider plate assemblies
EP1985820A1 (en) * 2006-02-17 2008-10-29 Hitachi Metals, Ltd. Heat-resistant cast steel exhaust manifold
EP1985820A4 (en) * 2006-02-17 2010-01-06 Hitachi Metals Ltd Heat-resistant cast steel exhaust manifold
US20100005798A1 (en) * 2008-07-08 2010-01-14 J. Eberspaecher Gmbh & Co. Kg Exhaust System
US8418459B2 (en) * 2008-07-08 2013-04-16 J. Eberspaecher Gmbh & Co. Kg Exhaust system
FR2947301A1 (en) * 2009-06-26 2010-12-31 Inst Francais Du Petrole Exhaust manifold for in-line four cylinder internal combustion engine, has body whose portion includes section with mechanical resistance higher than mechanical resistance of remaining part of body for assembling turbocompressor
EP2921669A1 (en) * 2014-03-20 2015-09-23 Benteler Automobiltechnik GmbH Exhaust manifold for an exhaust system of a combustion engine
CN104929747A (en) * 2014-03-20 2015-09-23 本特勒尔汽车技术有限公司 Exhaust manifold for exhaust device of internal combustion engine
DE102014103820A1 (en) * 2014-03-20 2015-09-24 Benteler Automobiltechnik Gmbh Exhaust manifold for an exhaust system of an internal combustion engine
US9518501B2 (en) 2014-03-20 2016-12-13 Benteler Automobiltechnik Gmbh Exhaust manifold for exhaust system of a combustion engine
EP2921669B1 (en) 2014-03-20 2016-12-21 Benteler Automobiltechnik GmbH Exhaust manifold for an exhaust system of a combustion engine
CN104929747B (en) * 2014-03-20 2018-01-16 本特勒尔汽车技术有限公司 Exhaust elbow for the exhaust apparatus of internal combustion engine

Also Published As

Publication number Publication date
EP0955453A3 (en) 2003-05-21
DE19819946A1 (en) 1999-11-11

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