EP2075432B1 - Collecteur de gaz d'échappement et son procédé de fabrication - Google Patents

Collecteur de gaz d'échappement et son procédé de fabrication Download PDF

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Publication number
EP2075432B1
EP2075432B1 EP08171416A EP08171416A EP2075432B1 EP 2075432 B1 EP2075432 B1 EP 2075432B1 EP 08171416 A EP08171416 A EP 08171416A EP 08171416 A EP08171416 A EP 08171416A EP 2075432 B1 EP2075432 B1 EP 2075432B1
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EP
European Patent Office
Prior art keywords
shell body
sliding fit
carried out
components
component
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.)
Active
Application number
EP08171416A
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German (de)
English (en)
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EP2075432A1 (fr
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.)
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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/fr
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Publication of EP2075432B1 publication Critical patent/EP2075432B1/fr
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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.
  • EP 0 695 901 A such as EP 1 522 687 A reveal exhaust manifold with sliding seats.
  • 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.

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

Claims (12)

  1. Procédé pour fabriquer un collecteur de gaz d'échappement (1) isolé par une fente d'air pour une installation d'échappement d'un moteur à combustion interne, en particulier sur un véhicule automobile,
    - dans lequel des composants (7, 8, 9, 10) individuels véhiculant du gaz d'un corps de coque (4, 5) intérieur sont emboîtés les uns dans les autres dans la zone d'au moins un siège coulissant (13, 14),
    - dans lequel une opération de calibrage est effectuée dans la zone d'au moins un tel siège coulissant (13, 14) dans le cas de composants (7, 8, 9, 10) s'emboîtant les uns dans les autres, opération lors de laquelle une réduction de section s'effectue au moins sur le composant (8, 9) extérieur concerné,
    caractérisé
    - en ce que des tuyaux d'entrée (7) du corps de coque (4, 5) intérieur sont soudés avec une bride (2)
    - en ce qu'un corps de coque (3) extérieur est soudé dans la zone des tuyaux d'entrée (7) avec le corps de coque (4, 5) intérieur,
    - en ce qu'un espace de logement (15) enveloppé par le corps de coque (3) extérieur est subdivisé au moyen d'une paroi de séparation (16) en deux espaces partiels (17, 18),
    - en ce qu'à chaque fois un tel corps de coque (4, 5) intérieur est disposé dans chaque espace partiel (17, 18), de telle sorte que seuls les tuyaux d'entrée dépassent du corps de coque (3) extérieur.
  2. Procédé selon la revendication 1,
    caractérisé
    en ce que l'opération de calibrage est effectuée de telle sorte que les composants (7, 8, 9, 10) respectifs sont emboîtés ensuite sans jeu les uns dans les autres dans le siège coulissant (13, 14).
  3. Procédé selon la revendication 1 ou 2,
    caractérisé
    en ce que l'opération de calibrage est effectuée de telle sorte qu'un siège ajusté radial se forme dans le siège coulissant (13, 14) concerné, lequel siège autorise des déplacements relatifs axiaux dus à la chaleur entre les composants (7, 8, 9, 10) fixés les uns près des autres par l'intermédiaire du siège coulissant (13, 14) respectif.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé
    en ce que l'opération de calibrage est effectuée de telle sorte que, dans le siège coulissant (13, 14) concerné, on n'a pas de fente radialement entre le composant extérieur et le composant intérieur ou bien on a une fente avec une petite largeur de fente, qui peut être en particulier inférieure à une épaisseur de paroi du composant extérieur et/ou du composant intérieur dans la zone du siège coulissant (13, 14) et de préférence inférieure à 50 % ou inférieure à 20 % de cette épaisseur de paroi.
  5. Procédé selon la revendication 1,
    caractérisé
    en ce que l'opération de calibrage est effectuée en recourant à un manchon d'espacement (19), qui est disposé dans le siège coulissant (13, 14) radialement entre le composant (7, 8) intérieur et le composant (8, 9) extérieur, le manchon d'espacement (19) pouvant être conçu passager en particulier pour les températures apparaissant pendant le fonctionnement du collecteur de gaz (1).
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisé
    en ce que l'opération de calibrage est effectuée au moyen d'un outil de façonnage présentant deux demi-coques.
  7. Procédé selon la revendication 6,
    caractérisé
    en ce que, dans le même outil de façonnage et dans le même temps, le calibrage du composant (8, 9) extérieur respectif est effectué sur au moins deux sièges coulissants (13, 14).
  8. Procédé selon la revendication 6 ou 7,
    caractérisé
    en ce que, dans le même outil de façonnage et simultanément, le calibrage de composant (8, 9) extérieur respectif est effectué dans le cas de respectivement au moins un siège coulissant (13, 14) avec au moins deux corps de coque (4 5) intérieurs.
  9. Collecteur de gaz d'échappement isolé par fente d'air pour une installation d'échappement d'un moteur à combustion interne, en particulier sur un véhicule automobile,
    - comprenant un corps de coque (3) extérieur,
    - comprenant au moins un corps de coque (4, 5) intérieur, qui est assemblé à partir d'au moins deux composants (7, 8, 9, 10) véhiculant du gaz, lesquels sont emboîtés l'un dans l'autre dans la zone d'au moins un siège coulissant (13, 14),
    - au moins un tel siège coulissant (13, 14) ayant été calibré par le fait qu'une réduction de section a été effectuée au moins sur le composant (8, 9) extérieur par façonnage,
    caractérisé
    - en ce que des tuyaux d'entrée (7) du corps de coque (4, 5) intérieur respectif sont soudés avec une bride (2), alors que l'autre corps de coque (3) est soudé dans la zone des tuyaux d'entrée (7) avec le corps de coque (4, 5) intérieur respectif,
    - en ce que dans le corps de coque (3) extérieur est disposée une paroi de séparation (6), qui subdivise un espace de logement enveloppé par le corps de coque (3) extérieur en deux espaces partiels (17, 18), dans chacun desquels est disposé un tel corps de coque (4, 5) intérieur, seuls les tuyaux d'entrée (7) dépassant du corps de coque (3) extérieur.
  10. Collecteur de gaz d'échappement selon la revendication 9,
    caractérisé
    en ce que les composants (7, 8, 9, 10) respectifs sont emboîtés sans jeu les uns dans les autres dans le siège coulissant (13, 14) respectif.
  11. Collecteur de gaz d'échappement selon la revendication 9 ou 10,
    caractérisé
    en ce que l'on a un siège ajusté radial dans le siège coulissant (13, 14) respectif, qui autorise des déplacements relatifs axiaux conditionnés par la chaleur entre les composants (7, 8, 9, 10) placés les uns près des autres par l'intermédiaire du siège coulissant (13, 14).
  12. Collecteur de gaz d'échappement selon l'une des revendications 9 à 11,
    caractérisé
    en ce que les composants (7, 8, 9, 10) emboîtés les uns dans les autres sont contigus axialement sans fente dans le siège coulissant (13, 14) respectif ou en ce que radialement, entre le composant extérieur et le composant intérieur, on a une fente avec une petite largeur de fente, qui peut être en particulier inférieure à une épaisseur de paroi du composant extérieur et/ou du composant intérieur dans la zone du siège coulissant (13, 14) et de préférence inférieure à 50 % ou inférieure à 20 % de cette épaisseur de paroi.
EP08171416A 2007-12-24 2008-12-12 Collecteur de gaz d'échappement et son procédé de fabrication Active EP2075432B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007062659A DE102007062659A1 (de) 2007-12-24 2007-12-24 Abgassammler und zugehöriges Herstellungsverfahren

Publications (2)

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

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EP08171416A Active EP2075432B1 (fr) 2007-12-24 2008-12-12 Collecteur de gaz d'échappement et son procédé de fabrication

Country Status (5)

Country Link
US (1) US8196302B2 (fr)
EP (1) EP2075432B1 (fr)
JP (1) JP5305340B2 (fr)
CN (1) CN101469629B (fr)
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JP5305340B2 (ja) 2013-10-02
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EP2075432A1 (fr) 2009-07-01
DE102007062659A1 (de) 2009-06-25
JP2009150396A (ja) 2009-07-09
US20090158588A1 (en) 2009-06-25
US8196302B2 (en) 2012-06-12

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