DE102007043944A1 - Flexible pipe element for exhaust gas system of passenger car, has film made of three layers and formed as hollow cylinder between flexible inner tube and flexible, gas-tight cladding part, where exhaust gas flows via inner tube - Google Patents
Flexible pipe element for exhaust gas system of passenger car, has film made of three layers and formed as hollow cylinder between flexible inner tube and flexible, gas-tight cladding part, where exhaust gas flows via inner tube Download PDFInfo
- Publication number
- DE102007043944A1 DE102007043944A1 DE102007043944A DE102007043944A DE102007043944A1 DE 102007043944 A1 DE102007043944 A1 DE 102007043944A1 DE 102007043944 A DE102007043944 A DE 102007043944A DE 102007043944 A DE102007043944 A DE 102007043944A DE 102007043944 A1 DE102007043944 A1 DE 102007043944A1
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- Germany
- Prior art keywords
- vibration damping
- heat insulation
- combined heat
- flexible cable
- cable element
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible 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
- F01N13/14—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
-
- 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
- F01N13/148—Multiple layers of insulating material
-
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/026—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with interior reinforcement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/21—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for expansion-compensation devices
-
- 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
- F01N13/1805—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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/12—Tubes being corrugated
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Die Erfindung betrifft ein flexibles Leitungselement mit kombinierter Wärmeisolation und Schwingungsdämpfung. Bevorzugtes Anwendungsgebiet des hier beschriebenen Erfindungsgegenstands ist sein Einsatz in Abgasanlagen im Kraftfahrzeug-Bereich.The The invention relates to a flexible conduit element with combined Heat insulation and vibration damping. preferred Field of application of the subject invention described here is his Use in exhaust systems in the automotive sector.
Die Aufgabe flexibler Leitungselemente besteht darin, schwingungsbeanspruchte Rohrleitungen flexibel miteinander zu verbinden und dabei schwingungstechnisch weitgehend zu entkoppeln.The The task of flexible pipe elements is to vibrate Flexible connection of piping with each other while vibration technology largely decoupled.
Aufgrund
der im PKW-Bereich vorliegenden Forderung nach Gasdichtheit ist
ein Metallbalg hier oftmals ein Modul solcher Leitungselemente.
Da weltweite gesetzliche Vorschriften den Schadstoff-Ausstoß von dieselbetriebenen Fahrzeugen zukünftig deutlich nach unten regulieren, werden Abgasanlagen zukünftig vermehrt mit Nachbehandlungsmodulen wie z. B. Russpartikel-Filtern und SCR-Systemen ausgestattet werden. Oftmals geht mit der Integration von Nachbehandlungsmodulen die Forderung einher, dass kein ungereinigtes Abgas das System verlassen darf. Dies erfordert, dass insbesondere auch die flexiblen Leitungselemente gasdicht sind, da deren Einbauposition in der Regel zwischen Motorausgang und vor dem Eingang der Abgasleitung in die Nachbehandlungsaggregate liegt. Ein wesentlicher Teil der Nachbehandlung ist oftmals ein Russpartikel-Filter. Die darin enthaltenen Filtermatten werden mit steigender Betriebszeit von Russpartikeln verschlossen, so dass der Staudruck in der Abgasanlage ansteigt. Beim Erreichen eines kritischen Wertes kann eine aktive Filter-Regeneration erfolgen, bei der, z. B. durch das Einspritzen von zusätzlichem unverbrannten Dieselkraftstoff in die Abgasanlage, ein Abbrennen der Russpartikel aus den Filtermatten ausgelöst wird.There worldwide legal regulations pollutant emissions of diesel-powered vehicles in the future significantly down regulate exhaust systems will increasingly with in the future Aftertreatment modules such. B. particulate filters and SCR systems be equipped. Often, with the integration of aftertreatment modules, the Required that no unpurified exhaust gas leave the system may. This requires, in particular, the flexible conduit elements are gas-tight, as their installation position usually between the motor output and before the entrance of the exhaust pipe in the aftertreatment units lies. An essential part of aftertreatment is often one Soot particle filter. The filter mats contained in it are with increasing operating time of soot particles sealed, so that the dynamic pressure in the exhaust system increases. When reaching a critical value can be an active filter regeneration, at the, z. B. by injecting additional unburned Diesel fuel into the exhaust system, burning off the soot particles is released from the filter mats.
In einigen Anwendungen kann eine so genannte passive Regeneration erzielt werden. Dabei ist die im Normalbetrieb erreichte Abgastemperatur so hoch, dass es ohne zusätzliche Auslöser zu einer permanenten Regeneration der Filtermatten kommt. Die passive Regeneration kann ohne zusätzliche Maßnahmen ausgelöst werden und ist somit gegenüber der aktiven Regeneration die ökonomischere Variante. Die Voraussetzung dafür ist eine möglichst hohe Abgastemperatur im Partikelfilter. Um diese zu erzielen ist sicherzustellen, dass auf dem Weg des Abgases vom Motorausgang bis zum Filtereingang die Wärmeverluste minimal sind. Dahingehende technologische Spezifikationen fordern einen Temperaturverlust von maximal 20° Celsius auf diesem Weg. Zu deren Erfüllung ist es erforderlich, die Rohrleitung komplett zu isolieren. Dazu ist neben der Isolierung der starren Leitungsabschnitte ebenfalls die Isolierung des flexiblen Leitungselements notwendig.In some applications can achieve so-called passive regeneration become. In this case, the exhaust gas temperature reached in normal operation is so high, that it is a permanent without additional triggers Regeneration of the filter mats comes. The passive regeneration can triggered without additional measures become and is thus opposite to the active regeneration the more economical variant. The prerequisite for this is the highest possible exhaust gas temperature in the particle filter. To achieve this is to ensure that on the way of the exhaust from the motor output to the filter input the heat losses are minimal. Demanding technological specifications a temperature loss of maximum 20 ° Celsius on this way. To fulfill this, it is necessary to use the pipeline completely isolate. This is in addition to the isolation of the rigid Line sections also the insulation of the flexible conduit member necessary.
Aufgabe der Erfindung ist es, eine kombinierte Wärmeisolation und Schwingungsdämpfung für flexible Leitungselemente bereitzustellen, welche ähnliche Dämpfungseigenschaften wie ein Metallgestricke (Braiding), jedoch mit minimaler Reibung und mit minimalem Verschleiß, aufweist. Die gleichzeitige Isolation des flexiblen Leitungselements, so dass der Temperaturabfall im durchströmenden Abgas sehr klein ist, ist weitere Aufgabe der Erfindung.task The invention is a combined heat insulation and Vibration damping for flexible pipe elements provide similar damping characteristics like a metal knit (braiding), but with minimal friction and with minimal wear. The simultaneous isolation of the flexible conduit member so that the temperature drop in the flowing exhaust gas is very small, is another task the invention.
Die Aufgabe der Erfindung wird mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben.The object of the invention is achieved with the features of claim 1. Advantageous off designs are described in the subclaims.
Die erfindungsgemäße kombinierte Wärmeisolation und Schwingungsdämpfung besteht in einer bevorzugten Ausführungsform aus einem mehrlagigen, flexiblen Verbundwerkstoff, der zunächst eben ist und vor dem Verbringen in oder an das Leitungselement eine zylinderringförmige Kontur erhält.The inventive combined heat insulation and vibration damping is in a preferred embodiment made of a multi-layer, flexible composite, the first is just and before the introduction in or on the conduit element a cylindrical annular contour receives.
Sein mehrlagiger Aufbau sieht in den späteren Kontaktbereichen mit den metallischen Modulen des flexiblen Leitungselements Lagen des Verbundwerkstoffs vor, die unter hoher Temperatur Schmiereigenschaften besitzen. Folgende Stoffe sind beispielhaft, jedoch in der Aufzählung nicht abschließend für die Lagen mit Schmiereigenschaften unter hoher Temperatur geeignet:
- • Gestrickte Elemente aus Edelstahlfasern und Graphitfasern.
- • Gestrickte Elemente aus Edelstahlfasern und saugfähigen Fasern, an denen durch Tauchen in eine Flüssigkeit eine Graphit-Anlagerung erzeugt wird.
- • Precursorbeschichtetes Gewebe, bei dem der Grundwerkstoff Aluminiumoxid ist.
- • Precursorbeschichtetes Gewebe, bei dem der Grundwerkstoff glasartig ist.
- • Ein präkeramisches Polymer in fester, gelartiger oder schaumförmiger Konsistenz.
- • Faserverstärktes Gestricke aus Graphitband.
- • Knitted elements made of stainless steel fibers and graphite fibers.
- • Knitted elements made of stainless steel fibers and absorbent fibers, which are dipped in a liquid to create a graphite deposit.
- • Precursor-coated fabric in which the base material is alumina.
- • Precursor-coated fabric in which the base material is vitreous.
- • A preceramic polymer in solid, gelatinous or foamy consistency.
- • Fiber-reinforced knitwear made of graphite tape.
Ebenso können Kombinationen aus den genannten Zwischenstoffen für spezielle Anwendungen besonders geeignet sein. Eine bevorzugte Ausführungsform sieht engmaschige Gestricke für die Lagen mit Schmiereigenschaften unter hoher Temperatur vor.As well can combinations of the mentioned intermediates be particularly suitable for special applications. A preferred embodiment sees close-knit fabrics for the layers with lubricating properties under high temperature in front.
Neben den Lagen mit Schmiereigenschaften unter hoher Temperatur ist mindestens eine Lage eines Wärme isolierenden Materials vorgesehen. Folgende Stoffe sind beispielhaft, jedoch in der Aufzählung nicht abschließend für die Lagen mit Schmiereigenschaften unter hoher Temperatur geeignet:
- • Metall-Textil-Verbundwerkstoffe
- • Nadelvliese
- • texturiertes E-Glas
- • Gewebe aus keramischen Fasern, temperaturbeständigen Trägerfasern und festigkeitssteigernden Edelstahldrähten.
- • metal-textile composites
- • Needle fleece
- • textured E-glass
- • Fabrics made of ceramic fibers, temperature-resistant carrier fibers and strength-enhancing stainless steel wires.
Die Isolierwerkstoffe treten nicht direkt mit den metallischen Komponenten des flexiblen Leitungselements in Kontakt. Vielmehr werden sie durch die Lagen mit Schmiereigenschaften von diesem direkten Kontakt abgeschirmt. Ein Sandwich-Aufbau mit mehreren aufeinander folgenden Lagen mit abwechselnd Schmiereigenschaften, Isolationswirkung und Dämpfungswirkung kann zur Einstellung eines definierten Dämpfungsverhaltens verwendet werden.The Insulating materials do not occur directly with the metallic components the flexible conduit element in contact. Rather, they are by the Layers with lubricating properties shielded from this direct contact. A sandwich construction with several successive layers with alternately lubricating properties, insulation effect and damping effect can be used to set a defined damping behavior be used.
Die kombinierte Wärmeisolation und Schwingungsdämpfung wird beim Zusammenbau in dem oder an das Entkopplungselement derart verbracht, dass in einer bevorzugten Ausführungsform das flexible Leitungselement mit kombinierter Wärmeisolation und Schwingungsdämpfung nach den Merkmalen des Anspruchs 1 hervorgeht.The Combined heat insulation and vibration damping becomes such during assembly in or on the decoupling element that, in a preferred embodiment, the flexible cable element with combined heat insulation and vibration damping according to the features of the claim 1 shows.
In
einer ersten Ausführungsform (
In
einer zweiten Ausführungsform wird der oben beschriebene
Zusammenbau um eine Dämpfungsschicht (
Eine
dritte Ausführungsform sieht einen Aufbau gemäß
Im Außenbereich aller drei beschriebenen Ausführungsformen des erfindungsgemäßen Leitungselements können wiederum zusätzliche Elemente wie z. B. Braidings zum Einsatz kommen.in the Exterior of all three described embodiments of the conduit element according to the invention can turn additional elements such. B. Braidings used come.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 202006011404 U1 [0003, 0003] - DE 202006011404 U1 [0003, 0003]
- - EP 1467072 A1 [0003] - EP 1467072 A1 [0003]
- - DE 102005052204 A1 [0004] DE 102005052204 A1 [0004]
- - WO 2004/055422 A1 [0015] WO 2004/055422 A1 [0015]
- - DE 102005048479 A1 [0015] - DE 102005048479 A1 [0015]
Claims (26)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007043944A DE102007043944A1 (en) | 2007-09-14 | 2007-09-14 | Flexible pipe element for exhaust gas system of passenger car, has film made of three layers and formed as hollow cylinder between flexible inner tube and flexible, gas-tight cladding part, where exhaust gas flows via inner tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007043944A DE102007043944A1 (en) | 2007-09-14 | 2007-09-14 | Flexible pipe element for exhaust gas system of passenger car, has film made of three layers and formed as hollow cylinder between flexible inner tube and flexible, gas-tight cladding part, where exhaust gas flows via inner tube |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007043944A1 true DE102007043944A1 (en) | 2009-03-19 |
Family
ID=40348561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007043944A Withdrawn DE102007043944A1 (en) | 2007-09-14 | 2007-09-14 | Flexible pipe element for exhaust gas system of passenger car, has film made of three layers and formed as hollow cylinder between flexible inner tube and flexible, gas-tight cladding part, where exhaust gas flows via inner tube |
Country Status (1)
Country | Link |
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DE (1) | DE102007043944A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010037162A1 (en) | 2009-08-31 | 2011-03-03 | Westfalia Metallschlauchtechnik Gmbh & Co. Kg | Damping element for use in outer tube i.e. membrane bellow, of decoupling element for exhaust gas line in exhaust gas system of e.g. passenger car, has knitted fabric element comprising outer surface that comprises dome |
WO2011134633A1 (en) * | 2010-04-29 | 2011-11-03 | Boa Balg- Und Kompensatoren-Technologie Gmbh | Flexible line element |
WO2012104069A1 (en) | 2011-02-04 | 2012-08-09 | Boa Balg- Und Kompensatoren-Technologie Gmbh | Decoupling element, in particular for exhaust systems |
DE102011014350B3 (en) * | 2011-03-18 | 2012-08-30 | Boa Balg- Und Kompensatoren-Technologie Gmbh | Method for producing a thermally insulated decoupling element and a decoupling element, in particular for exhaust pipes of internal combustion engines |
DE102011110147A1 (en) | 2011-08-15 | 2013-02-21 | Westfalia Metallschlauchtechnik Gmbh & Co. Kg | Special damping strip for flexible line segments used as decoupling element in swing loaded pipelines in motor vehicles, has contour bound, metallic knitted fabric element arranged in cylindrical annular gap |
DE102011110219A1 (en) * | 2011-08-16 | 2013-02-21 | Boa Balg- Und Kompensatoren-Technologie Gmbh | A method for producing a winding tube, in particular Agraffschlauch and winding tube and flexible conduit member with a winding tube |
CN103533806A (en) * | 2012-07-05 | 2014-01-22 | 苏州沛德导热材料有限公司 | Graphite heat conducting foam |
DE102012216097A1 (en) * | 2012-09-12 | 2014-03-13 | Witzenmann Gmbh | Decoupling element for exhaust system of motor car, has flexible pipe element radially surrounding on outer side or inner side of bellows portion and two end portions, and air gap formed between line part and outer component |
DE102014109668A1 (en) * | 2014-07-10 | 2016-01-14 | Witzenmann Gmbh | line arrangement |
DE102014109667A1 (en) * | 2014-07-10 | 2016-01-14 | Witzenmann Gmbh | line arrangement |
US9261216B2 (en) | 2009-09-29 | 2016-02-16 | Tru-Flex, Llc | Exhaust system conduit with thermal/noise insulation |
WO2018077613A1 (en) * | 2016-10-25 | 2018-05-03 | Westfalia Metallschlauchtechnik Gmbh & Co. Kg | Line element consisting of a plurality of coaxial hoses |
CN109027493A (en) * | 2017-06-11 | 2018-12-18 | 江苏恒高电气制造有限公司 | Steel combined with aluminum corrugated expansion joint and its manufacturing process |
DE102018102158A1 (en) | 2018-01-31 | 2019-08-01 | Westfalia Metallschlauchtechnik Gmbh & Co. Kg | Exhaust duct means |
EP3667148A1 (en) * | 2018-12-13 | 2020-06-17 | Georg Fischer Rohrleitungssysteme AG | Length compensator |
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DE3708415A1 (en) * | 1987-03-14 | 1988-09-22 | Witzenmann Metallschlauchfab | FLEXIBLE PIPE ELEMENT FOR EXHAUST PIPES FROM COMBUSTION ENGINES |
DE4042291A1 (en) * | 1990-12-31 | 1992-07-02 | Witzenmann Metallschlauchfab | FLEXIBLE PIPE ELEMENT FOR EXHAUST PIPES FROM COMBUSTION ENGINES IN MOTOR VEHICLES |
WO2004055422A1 (en) | 2002-12-18 | 2004-07-01 | Westfalia Metallschlauchtechnik Gmbh & Co. Kg | Pipe element, especially for exhaust pipes in motor vehicles, and method for producing the same |
EP1467072A1 (en) | 2003-04-07 | 2004-10-13 | IWKA Balg- und Kompensatoren Technologie GmbH | Flexible pipe element |
DE202006011404U1 (en) | 2006-07-25 | 2006-09-28 | Witzenmann Gmbh | Flexible control unit for motor vehicle`s exhaust gas system, has metal tube having different standard axial loss factors of specific values, after operation of vehicle and during installation condition, respectively |
DE102005048479A1 (en) | 2005-10-07 | 2007-04-12 | Westfalia Metallschlauchtechnik Gmbh & Co. Kg | Metal hose arrangement for use as decoupling unit for exhaust gas lines of motor vehicle, has inner hose with fourth mantle shaft winding connected with outer hose between start and end of hose arrangement at welded joint |
DE102005052204A1 (en) | 2005-11-02 | 2007-06-06 | Witzenmann Gmbh | Flexible conduit element |
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2007
- 2007-09-14 DE DE102007043944A patent/DE102007043944A1/en not_active Withdrawn
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