EP2075432A1 - Exhaust collector and associated manufacturing method - Google Patents

Exhaust collector and associated manufacturing method Download PDF

Info

Publication number
EP2075432A1
EP2075432A1 EP08171416A EP08171416A EP2075432A1 EP 2075432 A1 EP2075432 A1 EP 2075432A1 EP 08171416 A EP08171416 A EP 08171416A EP 08171416 A EP08171416 A EP 08171416A EP 2075432 A1 EP2075432 A1 EP 2075432A1
Authority
EP
European Patent Office
Prior art keywords
sliding seat
components
calibration
carried out
shell body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08171416A
Other languages
German (de)
French (fr)
Other versions
EP2075432B1 (en
Inventor
Thomas Nording
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.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP2075432A1 publication Critical patent/EP2075432A1/en
Application granted granted Critical
Publication of EP2075432B1 publication Critical patent/EP2075432B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49398—Muffler, manifold or exhaust pipe making
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49861—Sizing mating parts during final positional association
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49879—Spaced wall tube or receptacle
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49909—Securing cup or tube between axially extending concentric annuli
    • Y10T29/49913—Securing cup or tube between axially extending concentric annuli by constricting outer annulus

Definitions

  • the present invention relates to a method for producing an air gap-insulated exhaust gas collector for an exhaust system of an internal combustion engine, in particular in a motor vehicle.
  • the invention also relates to an air gap insulated exhaust collector made by the method.
  • An exhaust manifold or exhaust manifold combines the exhaust gases of several cylinders of an internal combustion engine.
  • an air gap-insulated exhaust gas collector at least one inner shell body provided for the exhaust gas guide is enveloped by an outer shell body to form a thermally insulating air gap.
  • the cylinders of the internal combustion engine which supply the turbocharger with exhaust gas are subdivided into two groups in order to supply their exhaust gases separately to one of the inlet paths of the twin-scroll turbocharger.
  • the separate exhaust system of the individual cylinder groups can be done via separate exhaust manifold. In the case of an air gap-insulated exhaust gas collector, this can also be achieved by arranging two separate inner shell bodies in the common outer shell body, which are each assigned to a cylinder group.
  • the respective inner shell body in the case of air gap-insulated exhaust gas collectors, it is customary to assemble the respective inner shell body from a plurality of individual gas-conducting components.
  • the individual gas-conducting components are inserted into one another in the region of at least one sliding seat.
  • the design with sliding seats reduces thermally induced tensions within the exhaust collector.
  • the present invention is concerned with the problem of providing an improved embodiment for an exhaust gas collector or for an associated production method, which is distinguished in particular by the fact that the exhaust gas collector is particularly suitable for operation with a twin-scroll turbocharger. In particular, leakages in the area of the sliding seats should be reduced.
  • the invention is based on the general idea to carry out a calibration at the respective sliding seat.
  • at least the outer component in the respective sliding seat by forming a predetermined geometry.
  • a predetermined, comparatively narrow radial clearance can thereby be set in the respective sliding seat.
  • the calibration can be performed so that the two components in the sliding seat rest against each other without play.
  • it may be provided to reduce at least the respective outer component by targeted reshaping in terms of its cross-section to the extent that it comes to rest in the sliding seat on the respective inner component.
  • the interposed in the respective sliding fit components of the outer component is reduced by forming on the inner component.
  • the cross-section reduction is carried out so that still the sliding seat function is guaranteed.
  • the calibration can in particular be carried out so that within the respective sliding seat of the respective outer component after the cross-section reduction the respective inner member in the circumferential direction at at least three spaced apart locations.
  • the three circumferentially spaced contact locations may be formed by three discrete points of contact spaced apart in the circumferential direction.
  • at least one discrete contact point can be combined with at least one segment-shaped contact point, which enables contacting along a circumferential segment.
  • two or more such segmental contact points may suffice.
  • a circumferentially closed, so uninterrupted contact is conceivable.
  • the individual contact points can be punctiform or linear or flat.
  • an air gap-insulated exhaust collector 1 has a flange 2, an outer shell body 3 and at least one inner shell body 4, 5.
  • the exhaust manifold 1 has two inner shell bodies 4, 5.
  • the exhaust manifold 1 forms a total of an input area of an otherwise not shown exhaust system of an internal combustion engine, which may be arranged in particular in a motor vehicle.
  • an exhaust gas turbocharger 6 indicated here with a broken line is connected directly to the exhaust gas collector 1.
  • This is in particular a twin-scroll turbocharger 6, which is characterized by two separate inlet paths leading from an exhaust gas inlet of the turbocharger 6 to a turbine or to a turbine wheel of the turbocharger 6.
  • the outer shell body 3 encloses the two inner shell body 4, 5 spaced such that a thermally insulating air gap between the skin of the outer shell body 3 and the respective skin of the respective inner shell body 4, 5 is formed.
  • the two inner shell bodies 4, 5 are each assembled from a plurality of individual gas-conducting components.
  • each inner shell body 4, 5 has three inlet pipes 7, a connecting pipe 8, a coupling pipe 9 and an outlet pipe 10.
  • the inlet pipes 7 each have an inlet opening 11, which are each assigned to a cylinder of the internal combustion engine in the assembled state of the exhaust manifold 1.
  • the connecting pipe 8 connects the two first inlet pipes 11 via the coupling pipe 9 with the outlet pipe 10.
  • the outlet pipe 10 then connects the connecting pipe 8 and the third inlet pipe 11 with an outlet opening 12 of the respective inner shell body 4, 5.
  • the respective outlet opening 12 can now in mounted state directly to one of the two inlet paths of the twin-scroll turbocharger 6 lead.
  • the respective inner shell body 4, 5 each have two sliding seats 13 and 14.
  • the first sliding seat 13 is formed between the first inlet pipe 11 and the connecting pipe 8, while the second sliding seat 14 between the connecting pipe 8 and the coupling pipe 9 is formed is.
  • the respective sliding seat 13, 14 allows an axial displacement between the nested components.
  • the axial direction is defined by the axial direction of the respective sliding seat 13, 14 and thus by the insertion direction, in which in the respective sliding seat 13, 14, the two components are inserted into one another.
  • the connecting pipe 8 is the outer component
  • the first Inlet pipe 7 is the inner part.
  • the coupling pipe 9 is the outer component, while the connecting pipe 8 forms the inner part.
  • the individual components 7, 8, 9, 10 are inserted into one another in the region of the sliding seats 13, 14. Subsequently, at least in one of the sliding seats 13, 14, preferably in both sliding seats 13, 14 carried out a calibration, in which at least at the respective outer component is a cross-sectional reduction.
  • This calibration process can be carried out in a targeted manner so that then there is a predetermined, comparatively narrow radial gap between the two nested components in the sliding seat.
  • the gap width of this radial gap may in particular be smaller than the wall thickness of the respective inner component and / or the respective outer component in the respective sliding seat 13, 14. Preferred is an embodiment in which the gap width is less than 50% or even less than 20% of the wall thickness of the outer and / or inner component.
  • the gap width after the calibration process is significantly smaller than in the case of conventional construction, when the separately produced components are inserted into one another in the respective sliding seat 13, 14 due to comparatively large manufacturing tolerances.
  • the calibration can be carried out in such a way that subsequently the respective outer component comes into contact with the respective inner component.
  • the cross-sectional reduction required for this purpose can be carried out such that subsequently the outer component contacts the respective inner component in the region of the respective sliding seat 13, 14 at at least three points which are spaced from each other in the circumferential direction.
  • Ideal is an interruption in the circumferential direction, in particular flat, touch, between the nested components within the respective sliding seat 13, 14. It is important that the cross-section reduction is carried out in einstecksteckenden components, so that it is possible, the respective outer component to calibrate on the cross section of each inner component.
  • the calibration can in particular be carried out so that the two components are then inserted into each other in the sliding seat 13, 14 without play. Additionally or optionally, the calibration can also be carried out in such a way that a radial interference fit is produced in the respective sliding seat 13, 14.
  • the radial compression is specifically realized so that the press fit thermally induced relative axial movements that may be required between the by the sliding seat 13, 14 abutted components.
  • the calibration with cross-section reduction can be carried out, for example, with the aid of a forming tool which has two half-shells which are lowered onto one another.
  • This transformation can be realized particularly inexpensive.
  • the respective inner shell body 4, 5 can be inserted after the mating of the individual components in one of the half-shells of the forming tool. The other half-shell is then lowered, thereby realizing the transformation for calibration.
  • Particularly advantageous in this case is an embodiment in which two or more sliding seats 13, 14 can be deformed within the same inner shell body 4, 5 with respect to a cross-sectional reduction in the same forming tool simultaneously. Accordingly, then only one operation is required to calibrate all sliding seats 13, 14 according to the invention.
  • the two inner shell body 4, 5 of the exhaust manifold 1 in the same forming tool to simultaneously calibrate the respective sliding seats 13, 14 of the two inner shell body 4, 5 in a forming step.
  • the cross-sectional reductions of the respective outer components in the respective sliding seat 13, 14 can in principle be carried out in such a way that, in principle, a reduction in cross-section of the respective inner component is also accepted. In this case, however, it must be ensured that subsequently the resulting interference fit or the sliding seat 13, 14 present thereafter can still fulfill its functionality as a sliding seat 13, 14 during the thermal loads occurring during operation of the exhaust manifold 1. As already explained above, while a sluggish sliding seat 13, 14 is relatively uncritical, since sufficiently large forces occur during operation.
  • a spacer sleeve 19 radially between the respective inner component 7 and 8 and the outer component 8 and 9 to arrange, see. Fig. 2a .
  • This spacer sleeve 19 ensures during the calibration process that the two nested components 7 and 8 or 8 and 9 do not come into contact with each other due to the forming process.
  • the outer component 8 or 9 is thus supported via the spacer sleeve 19 on the inner component 7 or 8, at the same time also forming on the inner component 7 or 8 being basically feasible.
  • a defined radial gap can be formed in the respective sliding seat 13 or 14 by the calibration, which can initially be tightly closed by the spacer sleeve 19, cf. Fig. 2b ,
  • the spacer sleeve 19 is now made of a material, for. B. of a plastic which is volatile at the usual temperatures during operation of the exhaust collector 1.
  • the spacer sleeve 19 is fully incinerable.
  • the respective sliding seat 13 or 14 has the desired defined, ie calibrated radial clearance, which - as explained above - can be significantly smaller than in the conventional design without calibration, cf. Fig.
  • Fig. 2a shows the components 7 and 8 or 8 and 9 with inserted spacer sleeve 19 before calibration.
  • Fig. 2b shows the ingredients 7 and 8 and 8 and 9 with the spacer sleeve 19 after calibration and
  • Fig. 2c shows the calibrated sliding seat 13 and 14 after removing the spacer sleeve 19th
  • the inlet pipes 7 are connected to the flange 2, in particular welded.
  • the outer shell body 3 is firmly connected in the region of the inlet pipes 7 with the inner shell bodies 4, 5, in particular welded.
  • a connection to the flange 2 is not provided for the outer shell body 3 here, but can be realized in another embodiment.
  • the shell body 3 encloses a receiving space 15, in which both inner shell body 3, 4 are housed. Only the inlet pipes 7 project out of the outer shell body 3.
  • a partition wall 16 is arranged in the outer shell body 3, which divides the receiving space 15 into two subspaces 17 and 18, in each of which one of the inner shell body 4, 5 is arranged.
  • the partition wall 16 can in particular gas-tight or approximately gas-tight, the two subspaces 17, 18 separate from each other, whereby a pressure equalization between the two subspaces 17, 18 can be hindered.
  • the calibrated sliding seats 13, 14 are characterized by a reduced leakage, whereby a pressure equalization between the exhaust gas flows within the two inner shell body 4, 5 is hindered.
  • the partition wall 16 can bring about a further contribution to suppressing a pressure equalization between the two gas paths.
  • the separate connection of the two inner shell body causes 4, 5 via the separate outlet openings 12 to the two separate inlet paths of the turbocharger 6, a further independent and separate gas supply to the turbocharger 6. In this way, the twin-scroll turbocharger 6 can be operated particularly effectively.

Landscapes

  • 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 method involves stucking individual gas-carrying components of inner shell bodies (4,5) into one another in the area of the sliding fits (13,14). A calibration procedure is carried out in the area of the sliding fit with components extending into one another. A reduction of cross-section is effected at the outside of the components.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Herstellen eines luftspaltisolierten Abgassammlers für eine Abgasanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug. Die Erfindung betrifft außerdem einen nach dem Verfahren hergestellten luftspaltisolierten Abgassammler.The present invention relates to a method for producing an air gap-insulated exhaust gas collector for an exhaust system of an internal combustion engine, in particular in a motor vehicle. The invention also relates to an air gap insulated exhaust collector made by the method.

Ein Abgassammler oder auch Abgaskrümmer vereint die Abgase mehrerer Zylinder einer Brennkraftmaschine. Bei einem luftspaltisolierten Abgassammler ist zumindest ein zur Abgasführung vorgesehener innerer Schalenkörper von einem äußeren Schalenkörper unter Ausbildung eines thermisch isolierenden Luftspalts umhüllt. Durch die Verwendung luftspaltisolierter Abgassammler kann die thermische Belastung eines Motorblocks bzw. eines Zylinderkopfs, an den der Abgassammler angeflanscht ist, reduziert werden.An exhaust manifold or exhaust manifold combines the exhaust gases of several cylinders of an internal combustion engine. In the case of an air gap-insulated exhaust gas collector, at least one inner shell body provided for the exhaust gas guide is enveloped by an outer shell body to form a thermally insulating air gap. The use of air gap-insulated exhaust gas collector, the thermal load of an engine block or a cylinder head to which the exhaust manifold is flanged, can be reduced.

Zur Leistungssteigerung einer Brennkraftmaschine ist es allgemein bekannt, mit Hilfe eines Abgasturboladers das den Brennräumen zugeführte Frischgas aufzuladen. Hierzu kann der jeweilige Abgasturbolader abgasseitig unmittelbar an den Abgassammler angeschlossen sein. Das Abgas hat an dieser Stelle seine höchste Temperatur und seinen höchsten Druck, wodurch für den Abgasturbolader eine sehr hohe Enthalpie zur Verfügung steht. Moderne Turbolader können nach dem Twin-Scroll-Prinzip arbeiten. Zum einen weist ein solcher Twin-Scroll-Abgasturbolader zwei separate Einlasspfade auf, die vom gemeinsamen abgasseitigen Einlass zur gemeinsamen Turbine des Turboladers führen. Zum anderen werden die den Turbolader mit Abgas versorgenden Zylinder der Brennkraftmaschine in zwei Gruppen unterteilt, um deren Abgase getrennt jeweils einem der Einlasspfade des Twin-Scroll-Turboladers zuzuführen. Hierdurch kann eine gleichmäßigere Abgasbeaufschlagung der Turbine auch bei kleineren Drehzahlen der Brennkraftmaschine realisiert werden, was das Ansprechverhalten des Turboladers verbessert, insbesondere in Richtung kleinerer Drehzahlen verschiebt. Die separate Abgasführung der einzelnen Zylindergruppen kann über separate Abgassammler erfolgen. Bei einem luftspaltisolierten Abgassammler kann dies auch dadurch realisiert werden, dass im gemeinsamen äußeren Schalenkörper zwei separate innere Schalenkörper angeordnet sind, die jeweils einer Zylindergruppe zugeordnet sind.To increase the performance of an internal combustion engine, it is generally known to charge the combustion chambers supplied fresh gas with the aid of an exhaust gas turbocharger. For this purpose, the respective exhaust gas turbocharger exhaust side directly to the exhaust manifold be connected. The exhaust gas has at this point its highest temperature and its highest pressure, which is for the exhaust gas turbocharger, a very high enthalpy available. Modern turbochargers can work on the twin-scroll principle. On the one hand, such a twin-scroll exhaust-gas turbocharger has two separate inlet paths which lead from the common exhaust-side inlet to the common turbine of the turbocharger. On the other hand, the cylinders of the internal combustion engine which supply the turbocharger with exhaust gas are subdivided into two groups in order to supply their exhaust gases separately to one of the inlet paths of the twin-scroll turbocharger. In this way, a more uniform exhaust gas to the turbine can be realized even at lower speeds of the internal combustion engine, which improves the response of the turbocharger, in particular shifts towards smaller speeds. The separate exhaust system of the individual cylinder groups can be done via separate exhaust manifold. In the case of an air gap-insulated exhaust gas collector, this can also be achieved by arranging two separate inner shell bodies in the common outer shell body, which are each assigned to a cylinder group.

Insbesondere bei luftspaltisolierten Abgassammlern ist es üblich, den jeweiligen inneren Schalenkörper aus mehreren einzelnen gasführenden Bestandteilen zusammenzubauen. Hierzu sind die einzelnen gasführenden Bestandteile im Bereich wenigstens eines Schiebesitzes ineinander gesteckt. Die Bauweise mit Schiebesitzen reduziert thermisch bedingte Verspannungen innerhalb des Abgassammlers.In particular, in the case of air gap-insulated exhaust gas collectors, it is customary to assemble the respective inner shell body from a plurality of individual gas-conducting components. For this purpose, the individual gas-conducting components are inserted into one another in the region of at least one sliding seat. The design with sliding seats reduces thermally induced tensions within the exhaust collector.

Bei der Herstellung der einzelnen Bestandteile der inneren Schalenkörper müssen Herstellungstoleranzen berücksichtigt werden. Hierdurch greifen die jeweiligen Bestandteile innerhalb des jeweiligen Schiebesitzes zwangsläufig mit einem mehr oder weniger großen Radialspiel ineinander. Derartiges Radialspiel führt jedoch im Betrieb des Abgassammlers zu Leckage. Da der äußere Schalenkörper den jeweiligen inneren Schalenkörper gasdicht umschließt, sind derartige Leckagen üblicherweise unkritisch. Für die Verwendung des Abgassammlers in Verbindung mit einem Twin-Scroll-Abgasturbolader besteht jedoch das Bedürfnis, die Leckagen im Bereich des Schiebesitzes zu reduzieren, insbesondere dann, wenn in einem gemeinsamen äußeren Schalenkörper zwei innere Schalenkörper angeordnet sind.In the production of the individual components of the inner shell body manufacturing tolerances must be considered. As a result, the respective components within the respective sliding seat necessarily interlock with a more or less large radial clearance. However, such radial clearance leads to leakage during operation of the exhaust manifold. Since the outer shell body encloses the respective inner shell body gas-tight, such leaks are usually not critical. For the use of the exhaust manifold in conjunction with a twin-scroll turbocharger, however, there is a need to reduce the leakage in the region of the sliding seat, in particular when two inner shell body are arranged in a common outer shell body.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für einen Abgassammler bzw. für ein zugehöriges Herstellungsverfahren eine verbesserte Ausführungsform anzugeben, die sich insbesondere dadurch auszeichnet, dass sich der Abgassammler in besonderer Weise für den Betrieb mit einem Twin-Scroll-Abgasturbolader eignet. Insbesondere sollen Leckagen im Bereich der Schiebesitze reduziert werden.The present invention is concerned with the problem of providing an improved embodiment for an exhaust gas collector or for an associated production method, which is distinguished in particular by the fact that the exhaust gas collector is particularly suitable for operation with a twin-scroll turbocharger. In particular, leakages in the area of the sliding seats should be reduced.

Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, beim jeweiligen Schiebesitz einen Kalibriervorgang durchzuführen. Hierdurch erhält zumindest der äußere Bestandteil im jeweiligen Schiebesitz durch Umformung eine vorgegebene Geometrie. Insbesondere lässt sich dadurch im jeweiligen Schiebesitz ein vorbestimmtes, vergleichsweise enges Radialspiel einstellen. Ebenso kann die Kalibrierung so durchgeführt werden, dass die beiden Bestandteile im Schiebesitz spielfrei aneinander anliegen. Hierzu kann vorgesehen sein, zumindest den jeweils äußeren Bestandteil durch gezielte Umformung hinsichtlich seines Querschnitts soweit zu reduzieren, dass er im Schiebesitz am jeweiligen inneren Bestandteil zur Anlage kommt. Mit anderen Worten, bei den im jeweiligen Schiebesitz ineinander gesteckten Bestandteilen wird der äußere Bestandteil durch Umformung auf den inneren Bestandteil reduziert. Die Querschnittsreduzierung wird dabei so durchgeführt, dass nach wie vor die Schiebesitzfunktion gewährleistet ist. Dabei kommt es auf eine Leichtgängigkeit des Schiebesitzes nicht an, da die thermisch bedingten Relativbewegungen zwischen den einzelnen im Schiebesitz aneinander gelagerten Bestandteilen durch relativ große Spannungen bzw. Kräfte erzeugt werden, so dass grundsätzlich ein vergleichsweise schwergängiger Schiebesitz ausreicht, um unzulässige hohe Spannungen in der Struktur des Abgassammlers zu vermeiden.The invention is based on the general idea to carry out a calibration at the respective sliding seat. As a result, at least the outer component in the respective sliding seat by forming a predetermined geometry. In particular, a predetermined, comparatively narrow radial clearance can thereby be set in the respective sliding seat. Likewise, the calibration can be performed so that the two components in the sliding seat rest against each other without play. For this purpose, it may be provided to reduce at least the respective outer component by targeted reshaping in terms of its cross-section to the extent that it comes to rest in the sliding seat on the respective inner component. In other words, in the interposed in the respective sliding fit components of the outer component is reduced by forming on the inner component. The cross-section reduction is carried out so that still the sliding seat function is guaranteed. It does not depend on a smooth running of the sliding seat, since the thermally induced relative movements between the individual parts mounted in the sliding seat by relatively large stresses or forces are generated, so that in principle a comparatively stiff sliding fit sufficient to unacceptable high voltages in the structure to avoid the exhaust collector.

Die Kalibrierung kann insbesondere so durchgeführt werden, dass innerhalb des jeweiligen Schiebesitzes der jeweilige äußere Bestandteil nach der Querschnittsreduzierung den jeweiligen inneren Bestandteil in der Umfangsrichtung an mindestens drei voneinander beabstandeten Stellen berührt. Das bedeutet, dass eine radiale Festlegung der beiden Bestandteile aneinander realisiert wird. Die drei in Umfangsrichtung voneinander beabstandeten Berührungsstellen oder Kontaktstellen können beispielsweise durch drei in der Umfangsrichtung voneinander beabstandete diskrete Kontaktpunkte gebildet sein. Ebenso kann zumindest ein diskreter Kontaktpunkt mit wenigstens einer segmentförmigen Kontaktstelle kombiniert sein, die eine Kontaktierung entlang eines Umfangssegments ermöglicht. Ebenso können zwei oder mehr derartige segmentförmige Kontaktstellen ausreichen. Ebenso ist eine in Umfangsrichtung geschlossene, also unterbrechungsfreie Kontaktierung denkbar. Die einzelnen Kontaktstellen können dabei punktförmig oder linienförmig oder flächig ausfallen.The calibration can in particular be carried out so that within the respective sliding seat of the respective outer component after the cross-section reduction the respective inner member in the circumferential direction at at least three spaced apart locations. This means that a radial fixation of the two components is realized together. For example, the three circumferentially spaced contact locations may be formed by three discrete points of contact spaced apart in the circumferential direction. Likewise, at least one discrete contact point can be combined with at least one segment-shaped contact point, which enables contacting along a circumferential segment. Likewise, two or more such segmental contact points may suffice. Likewise, a circumferentially closed, so uninterrupted contact is conceivable. The individual contact points can be punctiform or linear or flat.

Da die gasführenden Bestandteile im Schiebesitz nach der jeweiligen Querschnittsreduzierung des äußeren Bestandsteils quasi aneinander anliegen, kann eine erhöhte Dichtungswirkung im Schiebesitz erzielt werden. Es ist klar, dass die Kontaktierung nicht zwangsläufig flächig sein muss, da dies lediglich im Idealfall möglich ist. Eine radiale Festlegung der ineinander steckenden Bestandteile wird auch schon dann erreicht, wenn in der Umfangsrichtung an mindestens drei voneinander beabstandeten Kontaktstellen eine radiale Abstützung erfolgt. Verbleibende Radialspalte sind im Vergleich zu ihrer axialen Länge im Schiebesitz klein, wodurch sich eine Drosselwirkung einstellt, die wie eine Dichtung wirkt, sogenannter Drosseldichtspalt. Sofern nun in einem gemeinsamen äußeren Schalenkörper zwei innere Schalenkörper angeordnet sind, deren Schiebesitze entsprechend dem erfindungsgemäßen Vorschlag kalibriert worden sind, kann nur noch wenig Gas aus einem der inneren Schalenkörper in den äußeren Schalenkörper austreten und aus diesem in den jeweils anderen inneren Schalenkörper gelangen. Durch die stark reduzierte bzw. stark gedämpfte Leckage im Bereich der Schiebesitze kann insbesondere ein Druckausgleich zwischen den separaten Gaspfaden innerhalb der inneren Schalenkörper vermieden werden, was die Effizienz des Twin-Scroll-Turboladers erhöht.Since the gas-carrying components in the sliding seat after the respective cross-sectional reduction of the outer component quasi abut each other, an increased sealing effect can be achieved in the sliding seat. It is clear that the contact does not necessarily have to be flat, as this is only possible in the ideal case. A radial definition of the nested components is also already achieved when in the circumferential direction at least three spaced contact points, a radial support takes place. Remaining radial gaps are small compared to their axial length in the sliding seat, creating a throttle effect, which acts like a seal acts, so-called throttle sealing gap. If now two inner shell body are arranged in a common outer shell body, the sliding seats have been calibrated according to the proposal according to the invention, only a small amount of gas can escape from one of the inner shell body in the outer shell body and get out of this in the other inner shell body. Due to the greatly reduced or strongly damped leakage in the region of the sliding seats, in particular a pressure equalization between the separate gas paths within the inner shell body can be avoided, which increases the efficiency of the twin-scroll turbocharger.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus der Zeichnung und aus der zugehörigen Figurenbeschreibung anhand der Zeichnung.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawing and from the associated description of the figures with reference to the drawing.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei gleiche oder ähnliche oder funktional gleiche Komponenten mit den gleichen Bezugszeichen versehen sind. Es zeigen, jeweils schematisch,

Fig. 1
einen Längsschnitt durch einen Abgassammler,
Fig. 2
einen Längsschnitt durch den Abgassammler im Bereich eines Schiebesitzes bei unterschiedlichen Herstellungsphasen a, b und c.
Preferred embodiments of the invention are illustrated in the drawing and are explained in more detail in the following description, wherein the same or similar or functionally identical components are provided with the same reference numerals. Show, in each case schematically,
Fig. 1
a longitudinal section through an exhaust manifold,
Fig. 2
a longitudinal section through the exhaust manifold in the region of a sliding seat at different stages of production a, b and c.

Entsprechend Fig. 1 weist ein luftspaltisolierter Abgassammler 1 einen Flansch 2, einen äußeren Schalenkörper 3 und wenigstens einen inneren Schalenkörper 4, 5 auf. Im Beispiel weist der Abgassammler 1 zwei innere Schalenkörper 4, 5 auf. Der Abgassammler 1 bildet insgesamt einen Eingangsbereich einer im übrigen nicht dargestellten Abgasanlage einer Brennkraftmaschine, die insbesondere in einem Kraftfahrzeug angeordnet sein kann. Vorzugsweise ist bei einer aufgeladenen Brennkraftmaschine ein hier mit unterbrochener Linie angedeuteter Abgasturbolader 6 unmittelbar an den Abgassammler 1 angeschlossen. Hierbei handelt es sich insbesondere um einen Twin-Scroll-Abgasturbolader 6, der sich durch zwei separate Einlasspfade auszeichnet, die von einem abgasseitigen Einlass des Turboladers 6 zu einer Turbine bzw. zu einem Turbinenrad des Turboladers 6 führen.Corresponding Fig. 1 For example, an air gap-insulated exhaust collector 1 has a flange 2, an outer shell body 3 and at least one inner shell body 4, 5. In the example, the exhaust manifold 1 has two inner shell bodies 4, 5. The exhaust manifold 1 forms a total of an input area of an otherwise not shown exhaust system of an internal combustion engine, which may be arranged in particular in a motor vehicle. Preferably, in a supercharged internal combustion engine, an exhaust gas turbocharger 6 indicated here with a broken line is connected directly to the exhaust gas collector 1. This is in particular a twin-scroll turbocharger 6, which is characterized by two separate inlet paths leading from an exhaust gas inlet of the turbocharger 6 to a turbine or to a turbine wheel of the turbocharger 6.

Der äußere Schalenkörper 3 umhüllt dabei die beiden inneren Schalenkörper 4, 5 derart beabstandet, dass ein thermisch isolierender Luftspalt zwischen der Haut des äußeren Schalenkörpers 3 und der jeweiligen Haut des jeweiligen inneren Schalenkörpers 4, 5 entsteht.The outer shell body 3 encloses the two inner shell body 4, 5 spaced such that a thermally insulating air gap between the skin of the outer shell body 3 and the respective skin of the respective inner shell body 4, 5 is formed.

Die beiden inneren Schalenkörper 4, 5 sind jeweils aus mehreren einzelnen gasführenden Bestandteilen zusammengebaut. Im gezeigten Beispiel weist jeder innere Schalenkörper 4, 5 drei Einlassrohre 7, ein Verbindungsrohr 8, ein Kopplungsrohr 9 und ein Auslassrohr 10 auf. Die Einlassrohre 7 weisen jeweils eine Einlassöffnung 11 auf, die im montierten Zustand des Abgassammlers 1 jeweils einem Zylinder der Brennkraftmaschine zugeordnet sind. Das Verbindungsrohr 8 verbindet die beiden ersten Einlassrohre 11 über das Kopplungsrohr 9 mit dem Auslassrohr 10. Das Auslassrohr 10 verbindet dann das Verbindungsrohr 8 und das dritte Einlassrohr 11 mit einer Auslassöffnung 12 des jeweiligen inneren Schalenkörpers 4, 5. Die jeweilige Auslassöffnung 12 kann nun im montierten Zustand unmittelbar zu einem der beiden Einlasspfade des Twin-Scroll-Turboladers 6 führen.The two inner shell bodies 4, 5 are each assembled from a plurality of individual gas-conducting components. In the example shown, each inner shell body 4, 5 has three inlet pipes 7, a connecting pipe 8, a coupling pipe 9 and an outlet pipe 10. The inlet pipes 7 each have an inlet opening 11, which are each assigned to a cylinder of the internal combustion engine in the assembled state of the exhaust manifold 1. The connecting pipe 8 connects the two first inlet pipes 11 via the coupling pipe 9 with the outlet pipe 10. The outlet pipe 10 then connects the connecting pipe 8 and the third inlet pipe 11 with an outlet opening 12 of the respective inner shell body 4, 5. The respective outlet opening 12 can now in mounted state directly to one of the two inlet paths of the twin-scroll turbocharger 6 lead.

Im gezeigten Beispiel besitzt der jeweilige innere Schalenkörper 4, 5 jeweils zwei Schiebesitze 13 bzw. 14. Der erste Schiebesitz 13 ist dabei zwischen dem ersten Einlassrohr 11 und dem Verbindungsrohr 8 ausgebildet, während der zweite Schiebesitz 14 zwischen dem Verbindungsrohr 8 und dem Kopplungsrohr 9 ausgebildet ist. Der jeweilige Schiebesitz 13, 14 ermöglicht eine Axialverschiebung zwischen den ineinander gesteckten Bestandteilen. Die Axialrichtung ist dabei durch die Axialrichtung des jeweiligen Schiebesitzes 13, 14 und somit durch die Steckrichtung definiert, in welcher im jeweiligen Schiebesitz 13, 14, die beiden Bestandteile ineinander gesteckt sind. Im ersten Schiebesitz 13 ist das Verbindungsrohr 8 der äußere Bestandteil, während das erste Einlassrohr 7 der innere Bestandteil ist. Im Unterschied dazu ist beim zweiten Schiebesitz 14 das Kopplungsrohr 9 der äußere Bestandteil, während das Verbindungsrohr 8 den inneren Bestandteil bildet.In the example shown, the respective inner shell body 4, 5 each have two sliding seats 13 and 14. The first sliding seat 13 is formed between the first inlet pipe 11 and the connecting pipe 8, while the second sliding seat 14 between the connecting pipe 8 and the coupling pipe 9 is formed is. The respective sliding seat 13, 14 allows an axial displacement between the nested components. The axial direction is defined by the axial direction of the respective sliding seat 13, 14 and thus by the insertion direction, in which in the respective sliding seat 13, 14, the two components are inserted into one another. In the first sliding seat 13, the connecting pipe 8 is the outer component, while the first Inlet pipe 7 is the inner part. In contrast, in the second sliding seat 14, the coupling pipe 9 is the outer component, while the connecting pipe 8 forms the inner part.

Beim Herstellen des jeweiligen inneren Schalenkörpers 4, 5 werden zunächst die einzelnen Bestandteile 7, 8, 9, 10 im Bereich der Schiebesitze 13, 14 ineinander gesteckt. Anschließend wird zumindest bei einem der Schiebesitze 13, 14, vorzugsweise bei beiden Schiebesitzen 13, 14 ein Kalibriervorgang durchgeführt, bei dem zumindest am jeweiligen äußeren Bestandteil eine Querschnittsreduzierung erfolgt. Dieser Kalibriervorgang kann dabei gezielt so durchgeführt werden, dass anschließend im Schiebesitz ein vorbestimmter, vergleichsweise enger Radialspalt zwischen den beiden ineinander steckenden Bestandteilen vorliegt. Die Spaltbreite dieses Radialspalts kann insbesondere kleiner sein als die Wandstärke des jeweiligen inneren Bestandteils und/oder des jeweiligen äußeren Bestandteils im jeweiligen Schiebesitz 13, 14. Bevorzugt ist eine Ausführungsform, bei welcher die Spaltbreite kleiner als 50 % oder sogar kleiner als 20 % der Wandstärke des äußeren und/oder inneren Bestandteils ist. Die Spaltbreite ist nach dem Kalibriervorgang jedenfalls signifikant kleiner als bei herkömmlicher Bauweise, wenn die separat hergestellten Bestandteile aufgrund vergleichsweise großer Herstellungstoleranzen im jeweiligen Schiebesitz 13, 14 ineinander stecken. Ebenso kann die Kalibrierung so durchgeführt werden, dass anschließend der jeweils äußere Bestandteil am jeweils inneren Bestandteil zur Anlage kommt.When producing the respective inner shell body 4, 5, first the individual components 7, 8, 9, 10 are inserted into one another in the region of the sliding seats 13, 14. Subsequently, at least in one of the sliding seats 13, 14, preferably in both sliding seats 13, 14 carried out a calibration, in which at least at the respective outer component is a cross-sectional reduction. This calibration process can be carried out in a targeted manner so that then there is a predetermined, comparatively narrow radial gap between the two nested components in the sliding seat. The gap width of this radial gap may in particular be smaller than the wall thickness of the respective inner component and / or the respective outer component in the respective sliding seat 13, 14. Preferred is an embodiment in which the gap width is less than 50% or even less than 20% of the wall thickness of the outer and / or inner component. In any case, the gap width after the calibration process is significantly smaller than in the case of conventional construction, when the separately produced components are inserted into one another in the respective sliding seat 13, 14 due to comparatively large manufacturing tolerances. Likewise, the calibration can be carried out in such a way that subsequently the respective outer component comes into contact with the respective inner component.

Die hierzu erforderliche Querschnittsreduzierung kann dabei so erfolgen, dass anschließend der äußere Bestandteil den jeweiligen inneren Bestandteil im Bereich des jeweiligen Schiebesitzes 13, 14 an mindestens drei in der Umfangsrichtung voneinander beabstandeten Stellen berührt. Ideal ist eine in der Umfangsrichtung unterbrechungsfreie, insbesondere flächige, Berührung, zwischen den ineinander gesteckten Bestandteilen innerhalb des jeweiligen Schiebesitzes 13, 14. Wichtig ist dabei, dass die Querschnittsreduzierung bei ineinandersteckenden Bestandteilen durchgeführt wird, so dass es also möglich ist, den jeweils äußeren Bestandteil auf den Querschnitt des jeweils inneren Bestandsteils zu kalibrieren.The cross-sectional reduction required for this purpose can be carried out such that subsequently the outer component contacts the respective inner component in the region of the respective sliding seat 13, 14 at at least three points which are spaced from each other in the circumferential direction. Ideal is an interruption in the circumferential direction, in particular flat, touch, between the nested components within the respective sliding seat 13, 14. It is important that the cross-section reduction is carried out in einstecksteckenden components, so that it is possible, the respective outer component to calibrate on the cross section of each inner component.

Die Kalibrierung kann insbesondere so durchgeführt werden, dass die beiden Bestandteile anschließend im Schiebesitz 13, 14 spielfrei ineinander gesteckt sind. Zusätzlich oder optional kann die Kalibrierung auch so durchgeführt werden, dass im jeweiligen Schiebesitz 13, 14 ein radialer Presssitz entsteht. Die radiale Verpressung ist dabei gezielt so realisiert, dass der Presssitz thermisch bedingte axiale Relativbewegungen zulässt, die zwischen den durch den Schiebesitz 13, 14 aneinander gelagerten Bestandteilen erforderlich sein können.The calibration can in particular be carried out so that the two components are then inserted into each other in the sliding seat 13, 14 without play. Additionally or optionally, the calibration can also be carried out in such a way that a radial interference fit is produced in the respective sliding seat 13, 14. The radial compression is specifically realized so that the press fit thermally induced relative axial movements that may be required between the by the sliding seat 13, 14 abutted components.

Die Kalibrierung mit Querschnittsreduzierung kann beispielsweise mit Hilfe eines Umformwerkzeugs durchgeführt werden, das zwei Halbschalen aufweist, die aufeinander gesenkt werden. Diese Umformung lässt sich besonders preiswert realisieren. Insbesondere kann der jeweilige innere Schalenkörper 4, 5 nach dem Zusammenstecken der einzelnen Bestandteile in eine der Halbschalen des Umformwerkzeugs eingelegt werden. Die andere Halbschale wird dann abgesenkt, wodurch die Umformung zur Kalibrierung realisiert wird. Besonders vorteilhaft ist dabei eine Ausführungsform, bei welcher im gleichen Umformwerkzeug gleichzeitig zwei oder mehr Schiebesitze 13, 14 innerhalb des gleichen inneren Schalenkörpers 4, 5 hinsichtlich einer Querschnittsreduzierung umgeformt werden können. Dementsprechend ist dann nur ein Arbeitsgang erforderlich, um alle Schiebesitze 13, 14 erfindungsgemäß zu kalibrieren. Bei einer Weiterbildung kann außerdem vorgesehen sein, im gleichen Umformwerkzeug die beiden inneren Schalenkörper 4, 5 des Abgassammlers 1 anzuordnen, um in einem Umformschritt die jeweiligen Schiebesitze 13, 14 der beiden inneren Schalenkörper 4, 5 simultan zu kalibrieren.The calibration with cross-section reduction can be carried out, for example, with the aid of a forming tool which has two half-shells which are lowered onto one another. This transformation can be realized particularly inexpensive. In particular, the respective inner shell body 4, 5 can be inserted after the mating of the individual components in one of the half-shells of the forming tool. The other half-shell is then lowered, thereby realizing the transformation for calibration. Particularly advantageous in this case is an embodiment in which two or more sliding seats 13, 14 can be deformed within the same inner shell body 4, 5 with respect to a cross-sectional reduction in the same forming tool simultaneously. Accordingly, then only one operation is required to calibrate all sliding seats 13, 14 according to the invention. In a further development may also be provided to arrange the two inner shell body 4, 5 of the exhaust manifold 1 in the same forming tool to simultaneously calibrate the respective sliding seats 13, 14 of the two inner shell body 4, 5 in a forming step.

Die Querschnittsreduzierungen der jeweils äußeren Bestandteile im jeweiligen Schiebesitz 13, 14 können prinzipiell so durchgeführt werden, dass dabei grundsätzlich auch eine Querschnittsreduzierung des jeweils inneren Bestandteils in Kauf genommen wird. Hierbei ist jedoch zu gewährleisten, dass anschließend der entstehende Presssitz bzw. der danach vorliegende Schiebesitz 13, 14 bei den im Betrieb des Abgassammlers 1 auftretenden thermischen Belastungen seine Funktionalität als Schiebesitz 13, 14 noch erfüllen kann. Wie bereits weiter oben erläutert, ist dabei ein schwergängiger Schiebesitz 13, 14 vergleichsweise unkritisch, da im Betrieb hinreichend große Kräfte auftreten.The cross-sectional reductions of the respective outer components in the respective sliding seat 13, 14 can in principle be carried out in such a way that, in principle, a reduction in cross-section of the respective inner component is also accepted. In this case, however, it must be ensured that subsequently the resulting interference fit or the sliding seat 13, 14 present thereafter can still fulfill its functionality as a sliding seat 13, 14 during the thermal loads occurring during operation of the exhaust manifold 1. As already explained above, while a sluggish sliding seat 13, 14 is relatively uncritical, since sufficiently large forces occur during operation.

Entsprechend den Fig. 2a bis 2c kann bei einer besonderen Ausführungsform vorgesehen sein, beim Zusammenbauen der inneren Schalenkörper 4, 5 in dem anschließend zu kalibrierenden Schiebesitz 13, 14 eine Distanzhülse 19 radial zwischen dem jeweiligen inneren Bestandteil 7 bzw. 8 und dem äußeren Bestandteil 8 bzw. 9 anzuordnen, vgl. Fig. 2a. Diese Distanzhülse 19 sorgt beim Kalibriervorgang dafür, dass durch den Umformvorgang die beiden ineinander steckenden Bestandteile 7 und 8 bzw. 8 und 9 nicht miteinander in Kontakt kommen. Beim Umformen stützt sich somit der äußere Bestandteil 8 bzw. 9 über die Distanzhülse 19 am inneren Bestandteil 7 bzw. 8 ab, wobei gleichzeitig auch eine Umformung am inneren Bestandteil 7 bzw. 8 grundsätzlich durchführbar ist. Durch die Verwendung einer derartigen Distanzhülse 19 lässt sich im jeweiligen Schiebesitz 13 bzw. 14 durch die Kalibrierung ein definierter Radialspalt ausbilden, der zunächst durch die Distanzhülse 19 dicht verschlossen sein kann, vgl. Fig. 2b. Zweckmäßig ist nun die Distanzhülse 19 aus einem Material hergestellt, z. B. aus einem Kunststoff, das bei den im Betrieb des Abgassammlers 1 üblichen Temperaturen flüchtig ist. Insbesondere ist die Distanzhülse 19 voll veraschbar. Nach der Verflüchtigung der Distanzhülse 19 weist der jeweilige Schiebesitz 13 bzw. 14 das gewünschte definierte, also kalibrierte Radialspiel auf, das - wie bereits weiter oben erläutert - deutlich kleiner sein kann als bei konventioneller Bauweise ohne Kalibriervorgang, vgl. Fig. 2c. Fig. 2a zeigt die Bestandteile 7 und 8 bzw. 8 und 9 mit eingesetzter Distanzhülse 19 vor dem Kalibrieren. Fig. 2b zeigt die Bestandteile 7 und 8 bzw. 8 und 9 mit der Distanzhülse 19 nach dem Kalibrieren und Fig. 2c zeigt den kalibrierten Schiebesitz 13 bzw. 14 nach dem Entfernen der Distanzhülse 19.According to the Fig. 2a to 2c can be provided in a particular embodiment, when assembling the inner shell body 4, 5 in the then to be calibrated sliding seat 13, 14 a spacer sleeve 19 radially between the respective inner component 7 and 8 and the outer component 8 and 9 to arrange, see. Fig. 2a , This spacer sleeve 19 ensures during the calibration process that the two nested components 7 and 8 or 8 and 9 do not come into contact with each other due to the forming process. During reshaping, the outer component 8 or 9 is thus supported via the spacer sleeve 19 on the inner component 7 or 8, at the same time also forming on the inner component 7 or 8 being basically feasible. By using such a spacer sleeve 19, a defined radial gap can be formed in the respective sliding seat 13 or 14 by the calibration, which can initially be tightly closed by the spacer sleeve 19, cf. Fig. 2b , Appropriately, the spacer sleeve 19 is now made of a material, for. B. of a plastic which is volatile at the usual temperatures during operation of the exhaust collector 1. In particular, the spacer sleeve 19 is fully incinerable. After volatilization of the spacer sleeve 19, the respective sliding seat 13 or 14 has the desired defined, ie calibrated radial clearance, which - as explained above - can be significantly smaller than in the conventional design without calibration, cf. Fig. 2c. Fig. 2a shows the components 7 and 8 or 8 and 9 with inserted spacer sleeve 19 before calibration. Fig. 2b shows the ingredients 7 and 8 and 8 and 9 with the spacer sleeve 19 after calibration and Fig. 2c shows the calibrated sliding seat 13 and 14 after removing the spacer sleeve 19th

Im gezeigten Beispiel sind die Einlassrohre 7 mit dem Flansch 2 verbunden, insbesondere verschweißt. Der äußere Schalenkörper 3 ist im Bereich der Einlassrohre 7 mit den inneren Schalenkörpern 4, 5 fest verbunden, insbesondere verschweißt. Eine Anbindung an den Flansch 2 ist für den äußeren Schalenkörper 3 hier nicht vorgesehen, kann jedoch bei einer anderen Ausführungsform realisiert sein. Der Schalenkörper 3 umhüllt einen Aufnahmeraum 15, in dem beide inneren Schalenkörper 3, 4 untergebracht sind. Lediglich die Einlassrohre 7 ragen aus dem äußeren Schalenkörper 3 heraus. Im Beispiel ist im äußeren Schalenkörper 3 eine Trennwand 16 angeordnet, die den Aufnahmeraum 15 in zwei Teilräume 17 und 18 unterteilt, in denen jeweils einer der inneren Schalenkörper 4, 5 angeordnet ist. Die Trennwand 16 kann insbesondere gasdicht oder annähernd gasdicht die beiden Teilräume 17, 18 voneinander trennen, wodurch ein Druckausgleich zwischen den beiden Teilräumen 17, 18 behindert werden kann.In the example shown, the inlet pipes 7 are connected to the flange 2, in particular welded. The outer shell body 3 is firmly connected in the region of the inlet pipes 7 with the inner shell bodies 4, 5, in particular welded. A connection to the flange 2 is not provided for the outer shell body 3 here, but can be realized in another embodiment. The shell body 3 encloses a receiving space 15, in which both inner shell body 3, 4 are housed. Only the inlet pipes 7 project out of the outer shell body 3. In the example, a partition wall 16 is arranged in the outer shell body 3, which divides the receiving space 15 into two subspaces 17 and 18, in each of which one of the inner shell body 4, 5 is arranged. The partition wall 16 can in particular gas-tight or approximately gas-tight, the two subspaces 17, 18 separate from each other, whereby a pressure equalization between the two subspaces 17, 18 can be hindered.

Die kalibrierten Schiebesitze 13, 14 zeichnen sich durch eine reduzierte Leckage aus, wodurch ein Druckausgleich zwischen den Abgasströmungen innerhalb der beiden inneren Schalenkörper 4, 5 behindert wird. Zusätzlich kann die Trennwand 16 einen weiteren Beitrag zur Unterbindung eines Druckausgleichs zwischen den beiden Gaspfaden bewirken. Ferner bewirkt der separate Anschluss der beiden inneren Schalenkörper 4, 5 über deren getrennte Auslassöffnungen 12 an die beiden separaten Einlasspfade des Turboladers 6 eine weitere unabhängige und separate Gasführung zum Turbolader 6. Auf diese Weise kann der Twin-Scroll-Turbolader 6 besonders effektiv betrieben werden.The calibrated sliding seats 13, 14 are characterized by a reduced leakage, whereby a pressure equalization between the exhaust gas flows within the two inner shell body 4, 5 is hindered. In addition, the partition wall 16 can bring about a further contribution to suppressing a pressure equalization between the two gas paths. Furthermore, the separate connection of the two inner shell body causes 4, 5 via the separate outlet openings 12 to the two separate inlet paths of the turbocharger 6, a further independent and separate gas supply to the turbocharger 6. In this way, the twin-scroll turbocharger 6 can be operated particularly effectively.

Claims (12)

Verfahren zum Herstellen eines luftspaltisolierten Abgassammlers (1) für eine Abgasanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, - bei dem einzelne gasführende Bestandteile (7, 8, 9, 10) eines inneren Schalenkörpers (4, 5) im Bereich wenigstens eines Schiebesitzes (13, 14) ineinander gesteckt werden, - bei dem im Bereich wenigstens eines solchen Schiebesitzes (13, 14) bei ineinandersteckenden Bestandteilen (7, 8, 9, 10) ein Kalibriervorgang durchgeführt wird, bei dem zumindest am jeweiligen äußeren Bestandteil (8, 9) eine Querschnittsreduzierung erfolgt. Method for producing an air gap-insulated exhaust collector (1) for an exhaust system of an internal combustion engine, in particular in a motor vehicle, in which individual gas-carrying components (7, 8, 9, 10) of an inner shell body (4, 5) are inserted into one another in the region of at least one sliding seat (13, 14), - In which in the region of at least one such sliding seat (13, 14) with ineinandersteckenden components (7, 8, 9, 10), a calibration is performed, in which at least at the respective outer component (8, 9) is a cross-sectional reduction. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
dass der Kalibriervorgang so durchgeführt wird, dass die jeweiligen Bestandteile (7, 8, 9, 10) anschließend im Schiebesitz (13, 14) spielfrei ineinander gesteckt sind.Method according to claim 1,
characterized,
that the calibration is carried out so that the respective components (7, 8, 9, 10) subsequently in the sliding seat (13, 14) are inserted into one another without play. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass der Kalibriervorgang so durchgeführt wird, dass im jeweiligen Schiebesitz (13, 14) ein radialer Presssitz entsteht, der thermisch bedingte axiale Relativbewegungen zwischen den über den jeweilige Schiebesitz (13, 14) aneinander gelagerten Bestandteilen (7, 8, 9, 10) zulässt.Method according to claim 1 or 2,
characterized,
that the calibration process is carried out in such a way that in the respective sliding seat (13, 14) a radial interference fit is created which permits thermally induced relative axial movements between the components (7, 8, 9, 10) mounted on the respective sliding seat (13, 14) , Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass der Kalibriervorgang so durchgeführt wird, dass im jeweiligen Schiebesitz (13, 14) radial zwischen dem äußeren Bestandteil und dem inneren Bestandteil kein Spalt oder ein Spalt mit einer kleinen Spaltbreite vorliegt, die insbesondere kleiner als eine Wandstärke des äußeren Bestandteils und/oder des inneren Bestandteils im Bereich des Schiebesitzes (13, 14) und vorzugsweise kleiner als 50 % oder kleiner als 20 % dieser Wandstärke sein kann.Method according to one of claims 1 to 3,
characterized,
that the calibration process is carried out so that in the respective sliding seat (13, 14) radially between the outer component and the inner component there is no gap or gap with a small gap width, in particular smaller than a wall thickness of the outer component and / or the inner Component in the region of the sliding seat (13, 14) and preferably less than 50% or less than 20% of this wall thickness may be. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
dass der Kalibriervorgang unter Zuhilfenahme einer Distanzhülse (19) durchgeführt wird, die im Schiebesitz (13, 14) radial zwischen dem inneren Bestandteil (7, 8) und dem äußeren Bestandteil (8, 9) angeordnet wird, wobei die Distanzhülse (19) insbesondere für die im Betrieb des Abgassammlers (1) auftretenden Temperaturen flüchtig ausgestaltet sein kann.Method according to claim 1,
characterized,
that the calibration is carried out with the aid of a spacer sleeve (19) in the sliding seat (13, 14) radially between the inner component (7, 8) and the outer part (8, 9), said spacer sleeve (19), in particular for the temperatures occurring during operation of the exhaust collector (1) can be designed to be volatile. Verfahren nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass der Kalibriervorgang mittels eines zwei Halbschalen aufweisenden Umformwerkzeugs durchgeführt wird.Method according to one of claims 1 to 5,
characterized,
that the calibration process is carried out by means of a forming tool having two half-shells. Verfahren nach Anspruch 6,
dadurch gekennzeichnet,
dass im gleichen Umformwerkzeug gleichzeitig bei mindestens zwei Schiebesitzen (13, 14) die Kalibrierung des jeweiligen äußeren Bestandteils (8, 9) durchgeführt wird.Method according to claim 6,
characterized,
that in the same forming tool at least two sliding seats (13, 14), the calibration of the respective outer component (8, 9) is carried out simultaneously. Verfahren nach Anspruch 6 oder 7,
dadurch gekennzeichnet,
dass im gleichen Umformwerkzeug gleichzeitig bei mindestens zwei inneren Schalenkörpern (4, 5) bei jeweils wenigstens einem Schiebesitz (13, 14) die Kalibrierung des jeweiligen äußeren Bestandteils (8, 9) durchgeführt wird.Method according to claim 6 or 7,
characterized,
that in the same forming tool at least two inner shell bodies (4, 5) in each case at least one sliding seat (13, 14), the calibration of the respective outer component (8, 9) is performed. Luftspaltisolierter Abgassammler für eine Abgasanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, - mit einem äußeren Schalenkörper (3), - mit wenigstens einem inneren Schalenkörper (4, 5), der aus mindestens zwei gasführenden Bestandteilen (7, 8, 9, 10) zusammengebaut ist, die im Bereich wenigstens eines Schiebesitzes (13, 14) ineinander gesteckt sind, - wobei wenigstens ein solcher Schiebesitz (13, 14) kalibriert worden ist, indem zumindest am äußeren Bestandteil (8, 9) durch Umformung eine Querschnittsreduzierung durchgeführt worden ist. Air gap-insulated exhaust manifold for an exhaust system of an internal combustion engine, in particular in a motor vehicle, - With an outer shell body (3), - With at least one inner shell body (4, 5) which is assembled from at least two gas-conducting components (7, 8, 9, 10), which are inserted into each other in the region of at least one sliding seat (13, 14), - Wherein at least one such sliding seat (13, 14) has been calibrated by at least the outer component (8, 9) has been carried out by forming a cross-sectional reduction. Abgassammler nach Anspruch 9,
dadurch gekennzeichnet,
dass die jeweiligen Bestandteile (7, 8, 9, 10) im jeweiligen Schiebesitz (13, 14) spielfrei ineinander gesteckt sind.Exhaust manifold according to claim 9,
characterized,
that the respective components (7, 8, 9, 10) in the respective slide seating (13, 14) are inserted into one another without play. Abgassammler nach Anspruch 9 oder 10,
dadurch gekennzeichnet,
dass im jeweiligen Schiebesitz (13, 14) ein radialer Presssitz vorliegt, der thermisch bedingte axiale Relativbewegungen zwischen den über den Schiebesitz (13, 14) aneinander gelagerten Bestandteilen (7, 8, 9, 10) zulässt.Exhaust manifold according to claim 9 or 10,
characterized,
that in the respective sliding seat (13, 14) there is a radial press fit, the thermally induced relative axial movements between the over the sliding seat (13, 14) mounted to each other components (7, 8, 9, 10). Abgassammler nach einem der Ansprüche 9 bis 11,
dadurch gekennzeichnet,
dass im jeweiligen Schiebesitz (13, 14) die ineinander gesteckten Bestandteile (7, 8, 9, 10) axial spaltfrei aneinander anliegen oder dass radial zwischen dem äußeren Bestandteil und dem inneren Bestandteil ein Spalt mit einer kleinen Spaltbreite vorliegt, die insbesondere kleiner als eine Wandstärke des äußeren Bestandteils und/oder des inneren Bestandteils im Bereich des Schiebesitzes (13, 14) und vorzugsweise kleiner als 50 % oder kleiner als 20 % dieser Wandstärke sein kann.Exhaust manifold according to one of claims 9 to 11,
characterized,
that in the respective sliding seat (13, 14) the nested components (7, 8, 9, 10) abut each other axially gap-free or that radially between the outer component and the inner component is a gap with a small gap width, in particular smaller than a Wall thickness of the outer component and / or the inner component in the region of the sliding seat (13, 14) and preferably less than 50% or less than 20% of this wall thickness may be.
EP08171416A 2007-12-24 2008-12-12 Exhaust collector and associated manufacturing method Active EP2075432B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007062659A DE102007062659A1 (en) 2007-12-24 2007-12-24 Exhaust manifold and related manufacturing process

Publications (2)

Publication Number Publication Date
EP2075432A1 true EP2075432A1 (en) 2009-07-01
EP2075432B1 EP2075432B1 (en) 2012-10-10

Family

ID=40474831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08171416A Active EP2075432B1 (en) 2007-12-24 2008-12-12 Exhaust collector and associated manufacturing method

Country Status (5)

Country Link
US (1) US8196302B2 (en)
EP (1) EP2075432B1 (en)
JP (1) JP5305340B2 (en)
CN (1) CN101469629B (en)
DE (1) DE102007062659A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013004352A1 (en) * 2011-07-06 2013-01-10 Faurecia Emissions Control Technologies, Germany Gmbh Method for producing an exhaust gas system, and exhaust gas system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007062661A1 (en) * 2007-12-24 2009-06-25 J. Eberspächer GmbH & Co. KG collector
JP2013213491A (en) * 2012-03-08 2013-10-17 Calsonic Kansei Corp Double pipe exhaust manifold
US9175644B2 (en) * 2013-02-08 2015-11-03 GM Global Technology Operations LLC Engine with exhaust gas recirculation system and variable geometry turbocharger
DE102013105133A1 (en) 2013-05-17 2014-11-20 Tenneco Gmbh Exhaust system element with seal
DE102013109446B4 (en) * 2013-08-30 2015-11-26 Benteler Automobiltechnik Gmbh Exhaust manifold with insulation sleeve
CN103993946B (en) * 2014-05-05 2016-06-01 江门气派摩托车有限公司 A kind of double tracheae collection of motorcycle connects silicone tube structure
DE102014010911A1 (en) 2014-07-23 2015-01-08 Daimler Ag Method and device for calibrating a pipe plug connection
DE102014221828A1 (en) * 2014-10-27 2016-04-28 Eberspächer Exhaust Technology GmbH & Co. KG Exhaust treatment arrangement, in particular for an exhaust gas flow path of an internal combustion engine and method for producing an exhaust gas treatment arrangement
DE102015116018A1 (en) * 2015-09-22 2017-03-23 Tenneco Gmbh elbow
CN107246308B (en) * 2017-07-25 2023-05-23 程显东 Split type blast pipe and installation frock thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437380A1 (en) * 1994-01-07 1995-07-13 Eberspaecher J Twin=walled exhaust pipe - comprises two shanks joined by bend and inner pipe has two sections connected by sliding joint in one shank and inner pipe support is in bend
EP0695901A1 (en) * 1994-08-06 1996-02-07 LEISTRITZ AG & CO. Abgastechnik Method for making a pipe coupling of the insertable type
US5799395A (en) * 1994-01-07 1998-09-01 J. Eberspacher Gmbh & Co. Process for manufacturing an air gap-insulated exhaust pipe
EP0919703A2 (en) * 1997-11-28 1999-06-02 DaimlerChrysler AG Method of making an air gap isolated exhaust manifold for a vehicle
EP1522687A2 (en) * 2003-10-07 2005-04-13 Friedrich Boysen GmbH & Co. KG Air gap manifold

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179884A (en) * 1977-08-08 1979-12-25 Caterpillar Tractor Co. Watercooled exhaust manifold and method of making same
US4182122A (en) * 1978-02-15 1980-01-08 Caterpillar Tractor Co. Insulated exhaust manifold
DE3216980A1 (en) 1982-05-06 1983-11-10 Zeuna-Stärker GmbH & Co KG, 8900 Augsburg Sheet-metal manifold for internal combustion engines
SE447214B (en) * 1984-03-20 1986-11-03 Stal Laval Turbin Ab SET TO INFEST TUBES IN TUBPLATES BY VEHICLE EXCHANGERS AND CONDENSORS
JPS63215809A (en) * 1987-03-04 1988-09-08 Toyota Motor Corp Pipe internal chill exhaust manifold
DE3872381D1 (en) * 1988-04-05 1992-07-30 Roth Technik Gmbh KNITTED WIRE AND METHOD FOR THE PRODUCTION THEREOF AND DEVICE FOR IMPLEMENTING THE METHOD.
US5100047A (en) * 1988-06-25 1992-03-31 Yukihiro Nakagawa Spacing ring for tubes in high temperature environment
JPH0255823A (en) 1988-08-17 1990-02-26 Nippon Steel Corp Exhaust manifold
US5170557A (en) * 1991-05-01 1992-12-15 Benteler Industries, Inc. Method of forming a double wall, air gap exhaust duct component
US5390494A (en) * 1993-04-27 1995-02-21 Ap Parts Manufacturing Company Pipe assembly for efficient light-off of catalytic converter
US5768890A (en) * 1993-11-12 1998-06-23 Benteler Automotive Corporation Exhaust air rail manifold
US5406795A (en) 1994-01-21 1995-04-18 Cummins Engine Company, Inc. Exhaust manifold to turbine casing flanges
US6247552B1 (en) * 1994-12-16 2001-06-19 J. Eberspächer Gmbh & Co. Air gap-insulated exhaust manifold
JPH0979033A (en) * 1995-09-13 1997-03-25 Sango Co Ltd Joint structure of pipe member and plate body, jointing method, and muffler with this joint structure
DE19628798B4 (en) * 1996-07-17 2008-04-17 Daimler Ag Exhaust manifold for the exhaust system of an internal combustion engine
DE19706386B4 (en) * 1997-02-19 2006-03-16 Daimlerchrysler Ag Method for producing an air-gap-insulated exhaust manifold
JP3157742B2 (en) * 1997-04-02 2001-04-16 株式会社三五 Manufacturing method of silencer
DE19752772C2 (en) * 1997-11-28 1999-09-02 Daimler Chrysler Ag Process for producing an air-gap-insulated exhaust pipe provided with a branch connection
ES2194431T3 (en) 1998-01-07 2003-11-16 Scambia Ind Dev Ag GAS EXHAUST DEVICE FOR AN INTERNAL COMBISTION ENGINE.
DE59914322D1 (en) 1998-10-05 2007-06-14 Scambia Ind Dev Ag Exhaust gas guide element and method for producing an exhaust gas guide element
DE19923557B4 (en) * 1999-05-21 2006-07-13 Daimlerchrysler Ag A built air gap insulated exhaust manifold of an exhaust system of a motor vehicle and a method for its production
DE19936470A1 (en) * 1999-08-03 2001-02-08 Mann & Hummel Filter Intake pipe system
US6654995B1 (en) * 2000-10-16 2003-12-02 General Motors Corporation Method for joining tubular members
DE10054006A1 (en) * 2000-11-01 2002-05-08 Daimler Chrysler Ag Exhaust manifold, for internal combustion engine, is insulated by air and is formed as inner tube, which penetrates into cylinder head, and outer tube, which is fitted to cylinder head by fixing bracket.
DE10102637A1 (en) 2001-01-20 2002-07-25 Bayerische Motoren Werke Ag Exhaust manifold for exhaust gas discharge from 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
JP2002276356A (en) * 2001-03-19 2002-09-25 Mazda Motor Corp Exhaust structure for on-vehicle engine
DE10121498A1 (en) * 2001-05-03 2002-11-07 Daimler Chrysler Ag Exhaust gas system for internal combustion engine has double-shell manifold with pipe connector formed on outer shell for tapping of exhaust gas for exhaust gas recirculation from insulating space between inner and outer shells
DE10125121A1 (en) * 2001-05-23 2002-11-28 Daimler Chrysler Ag Exhaust gas manifold for attaching to a cylinder head of an internal combustion engine comprises exhaust gas bores, an exhaust gas collection housing, a gas guiding channel, and a sealing device
DE10144015A1 (en) 2001-09-07 2003-03-27 Bayerische Motoren Werke Ag Exhaust system for multi-cylinder internal combustion engines
US6725656B2 (en) * 2001-12-07 2004-04-27 Dan T. Moore Company Insulated exhaust manifold
US6786190B2 (en) * 2002-11-25 2004-09-07 General Motors Corporation Compact turbocharged cylinder deactivation engine
US6941755B2 (en) * 2003-10-28 2005-09-13 Daimlerchrysler Corporation Integrated bypass and variable geometry configuration for an exhaust gas turbocharger
US7272927B2 (en) * 2003-11-07 2007-09-25 Heinrich Gillet Gmbh Air gap-insulated exhaust manifold for internal combustion engines
DE602004006698T2 (en) * 2003-12-01 2007-10-04 Nissan Motor Co., Ltd., Yokohama Exhaust manifold for an internal combustion engine
JP2005163623A (en) * 2003-12-02 2005-06-23 Calsonic Kansei Corp Exhaust manifold
DE10360645A1 (en) * 2003-12-23 2005-07-21 Daimlerchrysler Ag exhaust
US7127816B2 (en) * 2004-03-04 2006-10-31 Dana Corporation Method of permanently joining first and second metallic components
DE102004021196B4 (en) * 2004-04-29 2006-10-05 J. Eberspächer GmbH & Co. KG Air gap insulated exhaust manifold
JP2006037782A (en) * 2004-07-23 2006-02-09 Toyota Motor Corp Manifold converter
FR2875266B1 (en) * 2004-09-14 2006-12-08 Renault Sas EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE
DE102005002250A1 (en) 2005-01-18 2006-07-20 Bayerische Motoren Werke Ag Double-walled exhaust gas manifold for an internal combustion engine, has two inner walls which are made of sheet metal and protude into exhaust inlet whereby inner walls have enclosing wall
CN101270686A (en) * 2007-03-19 2008-09-24 河南柴油机集团有限责任公司 Advanced recovery and exhaustion system for reusable diesel exhaust gas
DE102007062661A1 (en) * 2007-12-24 2009-06-25 J. Eberspächer GmbH & Co. KG collector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437380A1 (en) * 1994-01-07 1995-07-13 Eberspaecher J Twin=walled exhaust pipe - comprises two shanks joined by bend and inner pipe has two sections connected by sliding joint in one shank and inner pipe support is in bend
US5799395A (en) * 1994-01-07 1998-09-01 J. Eberspacher Gmbh & Co. Process for manufacturing an air gap-insulated exhaust pipe
EP0695901A1 (en) * 1994-08-06 1996-02-07 LEISTRITZ AG & CO. Abgastechnik Method for making a pipe coupling of the insertable type
EP0919703A2 (en) * 1997-11-28 1999-06-02 DaimlerChrysler AG Method of making an air gap isolated exhaust manifold for a vehicle
EP1522687A2 (en) * 2003-10-07 2005-04-13 Friedrich Boysen GmbH & Co. KG Air gap manifold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013004352A1 (en) * 2011-07-06 2013-01-10 Faurecia Emissions Control Technologies, Germany Gmbh Method for producing an exhaust gas system, and exhaust gas system
CN103649484A (en) * 2011-07-06 2014-03-19 佛吉亚排放控制技术德国有限公司 Method for producing an exhaust gas system, and exhaust gas system

Also Published As

Publication number Publication date
JP2009150396A (en) 2009-07-09
DE102007062659A1 (en) 2009-06-25
US20090158588A1 (en) 2009-06-25
CN101469629B (en) 2016-08-03
JP5305340B2 (en) 2013-10-02
CN101469629A (en) 2009-07-01
US8196302B2 (en) 2012-06-12
EP2075432B1 (en) 2012-10-10

Similar Documents

Publication Publication Date Title
EP2075432B1 (en) Exhaust collector and associated manufacturing method
EP2075430B1 (en) Exhaust gas collector
EP2385225B1 (en) Silencer
EP2354483B1 (en) Exhaust muffler
EP1627997B1 (en) Muffler and manufacturing method.
DE19923557B4 (en) A built air gap insulated exhaust manifold of an exhaust system of a motor vehicle and a method for its production
EP1591636A1 (en) Air gap insulated exhaust manifold
WO2006119824A1 (en) Air-gap insulated motor vehicle exhaust duct
EP1548245A2 (en) Exhaust manifold
EP2843207B1 (en) Exhaust manifold with insulation sleeve
EP1704001B1 (en) Bent double-walled component, such as an exhaust pipe insulated by an air gap, and method for producing the same
DE102014110101A1 (en) MUFFLER
DE10228619B4 (en) Exhaust pipe for the exhaust system of a motor vehicle
EP0695901B1 (en) Method for making a pipe coupling of the insertable type
DE102005024831A1 (en) Silencer for an exhaust system and manufacturing process
EP2112345B1 (en) Exhaust gas manifold isolated by air gap
DE102004021894B4 (en) Air gap insulated exhaust pipe
DE102015010343A1 (en) Method for forming a guide element for guiding exhaust gas of an internal combustion engine
DE102020110478A1 (en) Exhaust gas routing device for an exhaust tract of an internal combustion engine and an internal combustion engine with an exhaust tract
DE102022000117A1 (en) Use for an outlet duct
DE102010054508A1 (en) Exhaust gas recirculation device for internal combustion engine, has housing connected with exhaust tube under interposition of sealing element that forms boundary wall of coolant channel and is made of aluminum or copper
DE102018131675A1 (en) Gas-tight joint connection with a spherical cap
DE102014015735A1 (en) Air gap insulated exhaust manifold and method of making such
DE102006023814A1 (en) Double-walled exhaust gas guiding unit for internal-combustion engine, has inner and outer pipes with respective reversibly deformable compensating units that compensate length variations of two pipes and/or displacement between pipes
EP1722081A1 (en) Manufacturing method for an exhaust gas treatment apparatus

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

17P Request for examination filed

Effective date: 20100104

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20100607

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 502008008362

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: F01N0007180000

Ipc: F01N0013180000

RIC1 Information provided on ipc code assigned before grant

Ipc: F01N 13/18 20100101AFI20110523BHEP

Ipc: F01N 13/10 20100101ALI20110523BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 579082

Country of ref document: AT

Kind code of ref document: T

Effective date: 20121015

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008008362

Country of ref document: DE

Effective date: 20121213

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20121010

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130121

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130110

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130210

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130211

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130111

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

BERE Be: lapsed

Owner name: J. EBERSPACHER G.M.B.H. & CO. KG

Effective date: 20121231

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: EBERSPAECHER EXHAUST TECHNOLOGY GMBH & CO. KG

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

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: MC

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

Effective date: 20121231

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130110

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

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

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

26N No opposition filed

Effective date: 20130711

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: BE

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

Effective date: 20121231

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20130905 AND 20130911

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008008362

Country of ref document: DE

Representative=s name: BRP RENAUD & PARTNER, DE

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

Ref country code: CH

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

Effective date: 20121231

Ref country code: IE

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

Effective date: 20121212

Ref country code: LI

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

Effective date: 20121231

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008008362

Country of ref document: DE

Effective date: 20130711

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008008362

Country of ref document: DE

Representative=s name: BRP RENAUD UND PARTNER MBB RECHTSANWAELTE PATE, DE

Effective date: 20131022

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008008362

Country of ref document: DE

Representative=s name: BRP RENAUD UND PARTNER MBB, DE

Effective date: 20131022

Ref country code: DE

Ref legal event code: R081

Ref document number: 502008008362

Country of ref document: DE

Owner name: EBERSPAECHER EXHAUST TECHNOLOGY GMBH & CO. KG, DE

Free format text: FORMER OWNER: J. EBERSPAECHER GMBH & CO. KG, 73730 ESSLINGEN, DE

Effective date: 20131022

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008008362

Country of ref document: DE

Representative=s name: BRP RENAUD & PARTNER, DE

Effective date: 20131022

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

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

Ref country code: LU

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

Effective date: 20121212

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121010

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

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081212

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 579082

Country of ref document: AT

Kind code of ref document: T

Effective date: 20131212

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

Ref country code: AT

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

Effective date: 20131212

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

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

Ref country code: IT

Payment date: 20171218

Year of fee payment: 10

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

Ref country code: IT

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

Effective date: 20181212

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502008008362

Country of ref document: DE

Owner name: PUREM GMBH, DE

Free format text: FORMER OWNER: EBERSPAECHER EXHAUST TECHNOLOGY GMBH & CO. KG, 66539 NEUNKIRCHEN, DE

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

Ref country code: GB

Payment date: 20231220

Year of fee payment: 16

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

Ref country code: FR

Payment date: 20231220

Year of fee payment: 16

Ref country code: DE

Payment date: 20231214

Year of fee payment: 16