EP0789137B1 - Exhaust pipe - Google Patents
Exhaust pipe Download PDFInfo
- Publication number
- EP0789137B1 EP0789137B1 EP97101684A EP97101684A EP0789137B1 EP 0789137 B1 EP0789137 B1 EP 0789137B1 EP 97101684 A EP97101684 A EP 97101684A EP 97101684 A EP97101684 A EP 97101684A EP 0789137 B1 EP0789137 B1 EP 0789137B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer tube
- expansion
- exhaust pipe
- exhaust
- compensators
- 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.)
- Expired - Lifetime
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
- F01N13/1805—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
- F01N13/1816—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 the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
-
- 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
-
- 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
-
- 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
- F01N13/1883—Construction facilitating manufacture, assembly, or disassembly manufactured by hydroforming
Definitions
- the invention relates to an exhaust pipe according to the features in the preamble of claim 1.
- Air gap insulated exhaust pipes allow decoupling of the gas-carrying inner tube from which the outer and inner tube absorbing internal forces. External forces result among other things as a result of vibrations. at The internal forces include thermal expansion of the outer tube. There are compensation arrangements for this required.
- an expansion compensator is part of the State of the art, in which two pipe sections through a flexible bridge link in the form of a corrugated tube with each other are connected.
- the cylindrical ends of the Corrugated pipe are the circumference of the ends of the pipe sections welded.
- the invention is based on the prior art Task based on an improved in functionality Exhaust pipe to create that at simple and lightweight construction insensitive to operational Tensions is.
- the number of individual compensation beads in an expansion compensator is tailored to the respective application. Therefore, several can be in one exhaust pipe Strain compensators exist that have a different Number of compensation beads. Also can the height or the diameter of the individual compensation beads in a strain compensator or by strain compensator different to strain compensators his. The configuration and positioning of the expansion compensators is made so that a reduction the component stresses is reached.
- the hydraulic hydroforming enables one cost-effective economical production of the exhaust pipe, especially under the aspect that the Exhaust pipes are mass-produced items that are mass-produced become. Hydraulic forming is also possible high dimensional accuracy with the smallest manufacturing tolerances.
- One or more expansion compensators can be installed in an exhaust pipe be provided. Basically, it is possible first of all to produce the expansion compensators in the outer tube, then the inner tube into the outer tube to bring and fix. This can be followed by a bending process connect to the created exhaust pipe to transform as needed. However, the forming is expedient the wall of the outer tube after the inner tube has been fitted and if necessary the bending process has been carried out.
- a particularly advantageous embodiment of the invention Basic idea is in the features of the claim 2 to see.
- the insulating annular air gap formed by hydraulic expansion of the outer tube This is usually done by first a straight inner tube and a straight outer tube into each other pushed as well as together at their end areas get connected. They are then bent together, being a mandrel is guided in the inner tube.
- the features of claim 3 result in a high level Stability of the exhaust pipe because of the expansion compensators each be positioned in an area where guaranteed is that the operationally occurring Tensions are reduced.
- the positioning is on the respective version of the exhaust pipe is component-specific Voted. The thermal expansion occurring during operation and forces from load change excitation become effective compensated.
- Figure 1 is a perspective representation a section of a double-walled elbow 1 shown.
- the inner pipe 2 is in its radial position in the outer tube 3 fixed.
- the strain compensators 9, 10 are by hydraulic bellows-like deformation the wall 11 of the outer tube 3 is formed. hereby 11 balance shafts 12 are created in the wall, which the thermally induced changes in length elastic take up.
- the balance shafts 12 are in the areas 13, 14 provided in which in operation with the largest Thermal stress is to be expected or where it is used most effective voltage equalization achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Exhaust Silencers (AREA)
- Joints Allowing Movement (AREA)
- Fluid-Pressure Circuits (AREA)
Description
Die Erfindung betrifft eine Abgasleitung gemäß den Merkmalen
im Oberbegriff des Anspruchs 1.The invention relates to an exhaust pipe according to the features
in the preamble of
Bei der Abgasführung von dem Verbrennungsmotor eines Automobils zu einem in die Abgasanlage integrierten Katalysator und/oder einer Motoraufladung werden doppelwandige Abgasleitungen eingesetzt. Hierdurch werden die Wärmeverluste des Abgases bis zum Katalysator bzw. der Motoraufladung gering gehalten, was einerseits ein schnelles Ansprechen des Katalysators bewirkt und andererseits die zur Motoraufladung zur Verfügung stehende Enthalpie erhöht.When exhaust gas routing from the internal combustion engine Automobiles to a catalyst integrated in the exhaust system and / or engine charging become double-walled Exhaust pipes used. This will reduce heat loss of the exhaust gas up to the catalyst or Engine charge kept low, which on the one hand quick response of the catalyst and on the other hand those available for engine charging Enthalpy increased.
Luftspaltisolierte Abgasleitungen erlauben eine Entkopplung des gasführenden Innenrohrs von dem die äußeren sowie inneren Kräfte aufnehmenden Außenrohr. Äußere Kräfte resultieren unter anderem als Folge von Schwingungen. Bei den inneren Kräften ist unter anderem die Wärmeausdehnung des äußeren Rohrs aufzunehmen. Hierzu sind Ausgleichsanordnungen erforderlich.Air gap insulated exhaust pipes allow decoupling of the gas-carrying inner tube from which the outer and inner tube absorbing internal forces. External forces result among other things as a result of vibrations. at The internal forces include thermal expansion of the outer tube. There are compensation arrangements for this required.
Aus der DE 39 25 802 A1 ist beispielsweise eine Schiebesitzkonstruktion für das innere gasführende Rohr bekannt. Das Innenrohr kann sich so ausdehnen, ohne Schaden zu nehmen.DE 39 25 802 A1, for example, describes a sliding seat construction known for the inner gas-carrying pipe. The inner tube can expand without damage to take.
Diese gasdurchlässigen Schiebesitze sind in der Regel am Außenrohr nicht einsetzbar. Demzufolge kommen hier gesonderte Ausgleichsgelenke bzw. Dehnungsausgleicher zum Einsatz.These gas-permeable sliding seats are usually on Outer tube cannot be used. As a result, there are separate ones Compensating joints or expansion compensators are used.
In diesem Zusammenhang zählt ein Dehnungsausgleicher zum Stand der Technik, bei welchem zwei Rohrabschnitte durch ein flexibles Brückenglied in Form eines Wellrohrs miteinander verbunden sind. Die zylindrischen Enden des Wellrohrs werden umfangsseitig der Enden der Rohrabschnitte verschweißt.In this context, an expansion compensator is part of the State of the art, in which two pipe sections through a flexible bridge link in the form of a corrugated tube with each other are connected. The cylindrical ends of the Corrugated pipe are the circumference of the ends of the pipe sections welded.
Der Einsatz derartiger Dehnungsausgleicher am Außenrohr einer doppelwandigen Abgasleitung ist jedoch mit nicht unerheblichen fertigungstechnischen und kostenmäßigen Mehraufwendungen verbunden. Auch wird durch die schweißtechnische Festlegung die Qualität der Abgasleitung verschlechtert. Neben dem zusätzlichen Gewicht durch die Dehnungsausgleicher ist weiterhin nachteilig, daß die Dehnungsausgleicher häufig nicht am Ort der größten auftretenden Wärmespannungen plaziert werden können und dann ihre Aufgabe nur bedingt erfüllen.The use of such expansion compensators on the outer tube a double-walled exhaust pipe is not with insignificant manufacturing and cost Additional expenses connected. Also through the the technical quality of the welding Exhaust pipe deteriorated. In addition to the additional Weight due to the expansion compensators remains disadvantageous that the expansion compensators are often not on Place the greatest occurring thermal stresses can be and then only partially fulfill their task.
Der Erfindung liegt ausgehend vom Stand der Technik die Aufgabe zugrunde, eine in ihrer Funktionalität verbesserte Abgasleitung zu schaffen, die bei einfacher und leicht bauender Ausbildung unempfindlich gegenüber betriebstechnischen Spannungen ist.The invention is based on the prior art Task based on an improved in functionality Exhaust pipe to create that at simple and lightweight construction insensitive to operational Tensions is.
Die Lösung dieser Aufgabe besteht nach der Erfindung in
den im kennzeichnenden Teil des Anspruchs 1 aufgeführten
Merkmalen.According to the invention, this object is achieved in
those listed in the characterizing part of
Danach ist der Dehnungsausgleicher durch hydraulische balgartige Umformformung der Wandung des Außenrohrs gebildet. Dies geschieht mittels des hydraulischen Innenhochdruckverfahrens. Das Außenrohr bildet damit ein einstückiges Formteil mit einem integrierten Dehnungsausgleicher ohne zusätzliche Schweißverbindungen für die Festlegung des Dehnungsausgleichers. Je nach betriebstechnischen bzw. konstruktiven Erfordernissen können auch mehrere Dehnungsausgleicher vorgesehen sein.After that, the expansion compensator is hydraulic bellows-like deformation of the wall of the outer tube. This is done using the hydraulic high pressure process. The outer tube thus forms a one-piece Molded part with an integrated expansion compensator without additional welded connections for the Determination of the expansion compensator. Depending on the operational or design requirements can also several strain compensators can be provided.
Durch die balgartige Ausbildung des Dehnungsausgleichers in Form von umlaufenden Ausgleichswellen oder -sicken werden die thermisch oder durch Wechsellastanregung bedingten Längenänderungen im Außenrohr elastisch aufgenommen. Äußere Kräfte infolge von Schwingungen werden kompensiert. Längenänderungen des Innenrohrs werden durch eine Schiebesitzanordnug in bekannter Weise ausgeglichen.Due to the bellows-like design of the expansion compensator in the form of rotating balancer shafts or beads are those caused thermally or by alternating load excitation Changes in length in the outer tube are absorbed elastically. External forces due to vibrations are compensated. Changes in length of the inner tube are caused by a sliding seat arrangement balanced in a known manner.
Die Anzahl der einzelnen Ausgleichssicken in einem Dehnungsausgleicher wird auf den jeweiligen Einsatzfall abgestimmt. In einer Abgasleitung können daher auch mehrere Dehnungsausgleicher vorhanden sein, die über eine unterschiedliche Anzahl von Ausgleichssicken verfügen. Auch kann die Höhe bzw. der Durchmesser der einzelnen Ausgleichssicken in einem Dehnungsausgleicher oder von Dehnungsausgleicher zu Dehnungsausgleicher unterschiedlich sein. Die Konfiguration und die Positionierung der Dehnungsausgleicher wird so vorgenommen, daß eine Reduzierung der Bauteilspannungen erreicht wird. The number of individual compensation beads in an expansion compensator is tailored to the respective application. Therefore, several can be in one exhaust pipe Strain compensators exist that have a different Number of compensation beads. Also can the height or the diameter of the individual compensation beads in a strain compensator or by strain compensator different to strain compensators his. The configuration and positioning of the expansion compensators is made so that a reduction the component stresses is reached.
Die hydraulische Innenhochdruckumformung ermöglicht eine kostengünstige wirtschaftliche Herstellung der Abgasleitung, insbesondere unter dem Aspekt, daß es sich bei den Abgasleitungen um Massenartikel handelt, die in Serie gefertigt werden. Auch ermöglicht die hydraulische Umformung eine hohe Maßgenauigkeit bei kleinsten Fertigungstoleranzen.The hydraulic hydroforming enables one cost-effective economical production of the exhaust pipe, especially under the aspect that the Exhaust pipes are mass-produced items that are mass-produced become. Hydraulic forming is also possible high dimensional accuracy with the smallest manufacturing tolerances.
Weiterhin zeichnet sich die erfindungsgemäße Abgasleitung durch ihre hohe Eigensteifigkeit aus, wobei ihr Gewicht durch den Wegfall von separaten Dehnungsausgleichern reduziert ist.Furthermore, the exhaust pipe according to the invention is distinguished characterized by their high rigidity, their weight reduced by eliminating the need for separate expansion compensators is.
In einer Abgasleitung können ein oder mehrere Dehnungsausgleicher vorgesehen sein. Grundsätzlich ist es möglich, zunächst die Dehnungsausgleicher im Außenrohr herzustellen, anschließend das Innenrohr in das Außenrohr einzubringen und zu fixieren. Hieran kann sich ein Biegevorgang anschließen, um die so geschaffene Abgasleitung bedarfsgerecht umzuformen. Zweckmäßig wird jedoch die Umformung der Wandung des Außenrohrs vorgenommen, nachdem das Innenrohr eingepaßt worden und ggf. der Biegevorgang durchgeführt worden ist.One or more expansion compensators can be installed in an exhaust pipe be provided. Basically, it is possible first of all to produce the expansion compensators in the outer tube, then the inner tube into the outer tube to bring and fix. This can be followed by a bending process connect to the created exhaust pipe to transform as needed. However, the forming is expedient the wall of the outer tube after the inner tube has been fitted and if necessary the bending process has been carried out.
Eine besonders vorteilhafte Ausgestaltung des erfindungsgemäßen
Grundgedankens ist in den Merkmalen des Anspruchs
2 zu sehen. Danach wird der isolierende ringförmige Luftspalt
durch hydraulische Aufweitung des Außenrohrs gebildet.
Üblicherweise geschieht dies dadurch, daß zunächst
ein gerades Innenrohr und ein gerades Außenrohr ineinander
geschoben sowie an ihren Endbereichen miteinander
verbunden werden. Sie werden dann gemeinsam gebogen, wobei
im Innenrohr ein Biegedorn geführt wird.A particularly advantageous embodiment of the invention
Basic idea is in the features of the
Der so entstandene Rohrkrümmer wird nach dem Biegen in eine der Sollkontur des Außenrohrs entsprechende Kalibrierform eingebracht und die Enden des Außenrohrs druckdicht verschlossen. Anschließend wird in den zwischen dem Innenrohr und dem Außenrohr gebildeten Zwischenraum sowie in das Innenrohr ein hydraulisches Druckmedium mit so hohem Druck gepreßt, daß sich das Außenrohr an die Wandung der Kalibrierform anlegt und die gewünschte Kontur des Außenrohrs entsteht. Da der Druck im Zwischenraum zwischen dem Innen- und dem Außenrohr und im Inneren des Innenrohrs gleich groß ist, bleibt die vorgegebene Form des Innenrohrs unbeeinflußt.The resulting pipe elbow is after bending in a calibration form corresponding to the target contour of the outer tube introduced and the ends of the outer tube pressure-tight locked. Then in the between the Inner tube and the outer tube formed space as well a hydraulic pressure medium with such a high pressure in the inner tube Pressure pressed that the outer tube against the wall the calibration form and the desired contour of the Outer tube is created. Because the pressure in the space between the inner and outer tubes and inside the inner tube is the same size, the specified shape of the Inner tube unaffected.
Hierbei ist es grundsätzlich möglich, die balgartige Umformung der Wandung des Außenrohrs und die Aufweitung des Außenrohrs in einem Umformvorgang hydraulisch vorzunehmen. Selbstverständlich können die Vorgänge auch unabhängig voneinander in unterschiedlichen Werkzeugen durchgeführt werden.It is basically possible to use bellows-like forming the wall of the outer tube and the expansion of the Perform the outer tube hydraulically in one forming process. Of course, the processes can also be independent performed by each other in different tools become.
Durch die Merkmale des Anspruchs 3 ergibt sich eine hohe Standfestigkeit der Abgasleitung, da die Dehnungsausgleicher jeweils in einem Bereich positioniert werden, wo gewährleistet ist, daß die betriebstechnisch auftretenden Spannungen reduziert werden. Die Positionierung wird auf die jeweilige Ausführung der Abgasleitung bauteilgerecht abgestimmt. Die im Betrieb auftretenden Wärmedehnungen und Kräfte aus Lastwechselanregungen werden damit effektiv kompensiert.The features of claim 3 result in a high level Stability of the exhaust pipe because of the expansion compensators each be positioned in an area where guaranteed is that the operationally occurring Tensions are reduced. The positioning is on the respective version of the exhaust pipe is component-specific Voted. The thermal expansion occurring during operation and forces from load change excitation become effective compensated.
Die erfindungsgemäße Abgasleitung zeichnet sich durch höchste mechanische Belastbarkeit bei großer geometrischer Gestaltungsfreiheit aus. Von Vorteil ist weiterhin, daß nicht nur Gewicht bei den Dehnungsausgleichern selbst eingespart, sondern auch eine Reduzierung der Wanddicke des Außenrohrs möglich ist. Damit verbinden sich zusätzliche Gewichtseinsparungen. Auch können kostengünstigere Materialien als bisher zum Einsatz gelangen. The exhaust pipe according to the invention is characterized by highest mechanical resilience with large geometric Freedom of design. Another advantage is that not only weight in the expansion compensators themselves saved, but also a reduction in wall thickness of the outer tube is possible. This is associated with additional ones Weight savings. Can also be cheaper Materials used so far.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben.The invention is based on one in the drawing illustrated embodiment described.
In der Figur 1 ist in perspektivischer Darstellungsweise
ein Ausschnitt aus einem doppelwandigen Rohrkrümmer 1
dargestellt. Dabei ist ein Innenrohr 2 in einem Außenrohr
3 unter Ausbildung eines ringförmigen Luftspalts 4 angeordnet.
Durch die Einschnürungen 5, 6 in den Endbereichen
7 und 8 des Rohrkrümmers 1 ist das Innenrohr 2 in seiner
radialen Lage im Außenrohr 3 fixiert.In Figure 1 is a perspective representation
a section of a double-
Um die infolge des Temperatureinflusses des durch den
Rohrkrümmer 1 geführten Abgases auftretende Wärmeausdehnung
im Außenrohr 3 zu kompensieren, sind im Außenrohr 3
Dehnungsausgleicher 9, 10 angeordnet. Die Dehnungsausgleicher
9, 10 sind durch hydraulische balgartige Umformung
der Wandung 11 des Außenrohrs 3 gebildet. Hierdurch
sind in der Wandung 11 Ausgleichswellen 12 geschaffen,
welche die thermisch bedingten Längenänderungen elastisch
aufnehmen. Die Ausgleichswellen 12 sind in den Bereichen
13, 14 vorgesehen, in denen im Betrieb mit der größten
Wärmespannung zu rechnen ist bzw. wo ihr Einsatz den
effektivsten Spannungsausgleich erzielt. To the due to the temperature influence of the
- 1 -1 -
- Rohrkrümmerelbow
- 2 -2 -
- Innenrohrinner tube
- 3 -3 -
- Außenrohrouter tube
- 4 -4 -
- Luftspaltair gap
- 5 -5 -
- Einschnürungconstriction
- 6 -6 -
- Einschnürungconstriction
- 7 -7 -
- Ende v. 1End of v. 1
- 8 -8th -
- Ende v. 1End of v. 1
- 9 -9 -
- Dehnungsausgleicherexpansion joints
- 10 -10 -
- Dehnungsausgleicherexpansion joints
- 11 -11 -
- Wandung v. 3Wall v. 3
- 12 -12 -
- Ausgleichswellebalancer shaft
- 13 -13 -
- Bereich v. 3Area v. 3
- 14 -14 -
- Bereich v. 3Area v. 3
Claims (3)
- A double-walled exhaust-gas pipe comprising an inner tube (2) movable relative to an outer tube (3) so as to leave an annular air gap (4), an expansion compensator (9, 10) being associated with the outer tube (5) only, characterised in that the expansion compensator (9, 10) is formed by hydraulically generated bellows-like deformation of the wall (11) of the outer tube (3).
- An exhaust-gas pipe according to claim 1, characterised in that the air gap (4) is formed by hydraulic widening of the outer tube (3).
- An exhaust-gas pipe according to claim 1 or 2, characterised in that each expansion compensator (9, 10) is provided in a region (13, 14) where the stress on the component is reduced.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996104367 DE19604367C2 (en) | 1996-02-07 | 1996-02-07 | Exhaust pipe |
| DE19604367 | 1996-02-07 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0789137A2 EP0789137A2 (en) | 1997-08-13 |
| EP0789137A3 EP0789137A3 (en) | 1998-04-01 |
| EP0789137B1 true EP0789137B1 (en) | 2002-01-16 |
Family
ID=7784710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97101684A Expired - Lifetime EP0789137B1 (en) | 1996-02-07 | 1997-02-03 | Exhaust pipe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0789137B1 (en) |
| DE (1) | DE19604367C2 (en) |
| ES (1) | ES2166478T3 (en) |
| PT (1) | PT789137E (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9927053B2 (en) | 2014-03-17 | 2018-03-27 | Omachron Intellectual Property Inc. | Expansion compensator with connectors |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19642692C2 (en) * | 1996-10-16 | 2000-06-29 | Daimler Chrysler Ag | Exhaust pipe |
| DE19816259A1 (en) * | 1998-04-11 | 1999-10-14 | Audi Ag | Motor vehicle exhaust pipe of concentric inner and outer tubes |
| EP1101997B1 (en) * | 1999-11-18 | 2001-10-24 | Senior Flexonics Automotive Limited | Flexible pipe having fine mesh braid liner |
| DE10059195B4 (en) * | 2000-11-29 | 2006-04-06 | Benteler Automobiltechnik Gmbh | Arrangement for the treatment of the exhaust gases passing from a gasoline engine with direct injection |
| DE102007048560A1 (en) * | 2007-10-09 | 2009-04-23 | Audi Ag | Device for post-treatment of exhaust gases of a lean-running internal combustion engine |
| DE102007052243A1 (en) | 2007-11-02 | 2009-05-07 | Daimler Ag | Exhaust pipe component |
| CA2846921C (en) | 2014-03-18 | 2017-04-25 | G.B.D. Corp. | Expansion compensator with multiple layers with differing stiffness |
| US10046510B2 (en) | 2014-03-25 | 2018-08-14 | Omachron Intellectual Property Inc. | Methods of manufacturing an expansion compensator |
| CA2855326A1 (en) | 2014-06-26 | 2015-12-26 | G.B.D. Corp. | Method of installing an expansion compensator |
| CN108457735A (en) * | 2018-03-22 | 2018-08-28 | 力帆实业(集团)股份有限公司 | The heat shield structure of gas exhaust piping |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0737803A1 (en) * | 1995-04-13 | 1996-10-16 | Mercedes-Benz Ag | Exhaust collector, particularly for an internal combustion engine in a motor vehicle, and process for its manufacture |
| EP0779418A1 (en) * | 1995-12-13 | 1997-06-18 | Zeuna-Stärker Gmbh & Co Kg | Exhaust manifold and method for its manufacture |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3326260A1 (en) * | 1983-07-21 | 1985-02-07 | Witzenmann GmbH, Metallschlauch-Fabrik Pforzheim, 7530 Pforzheim | Exhaust pipe |
| DE3714761A1 (en) * | 1987-05-02 | 1988-11-17 | Witzenmann Metallschlauchfab | Exhaust line for internal combustion engines |
| DE3925802A1 (en) * | 1989-08-04 | 1991-02-07 | Bayerische Motoren Werke Ag | Exhaust manifold for use with turbo-charger - has set steel tubes fixed between cast flanges |
| DE4019899C1 (en) * | 1990-06-22 | 1991-12-19 | Benteler Ag, 4790 Paderborn, De | |
| US5363544A (en) * | 1993-05-20 | 1994-11-15 | Benteler Industries, Inc. | Multi-stage dual wall hydroforming |
-
1996
- 1996-02-07 DE DE1996104367 patent/DE19604367C2/en not_active Expired - Fee Related
-
1997
- 1997-02-03 PT PT97101684T patent/PT789137E/en unknown
- 1997-02-03 ES ES97101684T patent/ES2166478T3/en not_active Expired - Lifetime
- 1997-02-03 EP EP97101684A patent/EP0789137B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0737803A1 (en) * | 1995-04-13 | 1996-10-16 | Mercedes-Benz Ag | Exhaust collector, particularly for an internal combustion engine in a motor vehicle, and process for its manufacture |
| EP0779418A1 (en) * | 1995-12-13 | 1997-06-18 | Zeuna-Stärker Gmbh & Co Kg | Exhaust manifold and method for its manufacture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9927053B2 (en) | 2014-03-17 | 2018-03-27 | Omachron Intellectual Property Inc. | Expansion compensator with connectors |
Also Published As
| Publication number | Publication date |
|---|---|
| PT789137E (en) | 2002-05-31 |
| DE19604367C2 (en) | 2000-12-07 |
| EP0789137A3 (en) | 1998-04-01 |
| ES2166478T3 (en) | 2002-04-16 |
| EP0789137A2 (en) | 1997-08-13 |
| DE19604367A1 (en) | 1997-08-14 |
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