DE102004021894A1 - Airgap isolated tail pipe used in vehicle exhaust system, has pipe sections connected by stretch compensator, in which each pipe section has external and internal tubes fitted into slide fits of stretch compensator, forming annular gaps - Google Patents
Airgap isolated tail pipe used in vehicle exhaust system, has pipe sections connected by stretch compensator, in which each pipe section has external and internal tubes fitted into slide fits of stretch compensator, forming annular gaps Download PDFInfo
- Publication number
- DE102004021894A1 DE102004021894A1 DE200410021894 DE102004021894A DE102004021894A1 DE 102004021894 A1 DE102004021894 A1 DE 102004021894A1 DE 200410021894 DE200410021894 DE 200410021894 DE 102004021894 A DE102004021894 A DE 102004021894A DE 102004021894 A1 DE102004021894 A1 DE 102004021894A1
- Authority
- DE
- Germany
- Prior art keywords
- pipe
- compensator
- stretch
- tubes
- stretch compensator
- 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
Links
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
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
- F01N13/141—Double-walled exhaust pipes or housings
- F01N13/143—Double-walled exhaust pipes or housings with air filling the space between both walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—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
Abstract
Description
Die Erfindung betrifft ein luftspaltisoliertes Abgasrohr gemäß dem Oberbegriff des Patentanspruches 1.The The invention relates to an air gap-insulated exhaust pipe according to the preamble of claim 1.
Ein
gattungsgemäßes Abgasrohr
ist aus der
Des weiteren treten beim Erwärmen der Abgasanlage aufgrund der dabei entstehenden Dehnungen zusätzlich laterale Belastungen auf, welche zudem noch verstärkt werden, wenn bei der Montage des luftspaltisolierten Abgasrohres größere Toleranzen hinsichtlich der Verschraubung der Ausgangsflansche, die mit dem Abgasrohr fest verbunden sind, überbrückt werden müssen. Diese lateralen Kräfte, die die Lebensdauer des Dehnungskompensators aufgrund übermäßiger Biegung normalerweise stark herabsetzen, werden hier durch den Steckverbund der Rohrabschnitte durch die Außenrohre abgefangen, so dass der Dehnungskompensator keinen Schaden erleidet. Aufgrund dessen jedoch, dass die Innenrohre an den Außenrohren angepresst sind, verspannen sich die Innenrohre unter lateraler Belastung, so dass im Motorbetrieb die Innenrohre zur Rissbildung neigen.Of further occur during heating the exhaust system due to the resulting strains additional lateral Strains, which are also reinforced if, when mounting the Air gap insulated exhaust pipe larger tolerances in terms the screwing of the output flanges, with the exhaust pipe fixed are bridged have to. These lateral forces, the the life of the expansion compensator due to excessive bending usually lower greatly, are here by the composite of the Pipe sections through the outer pipes intercepted so that the expansion compensator does not suffer damage. Due to this, however, that the inner tubes on the outer tubes are pressed, the inner tubes tense under lateral Load, so that during engine operation, the inner tubes for cracking tend.
Demgegenüber liegt der Erfindung die Aufgabe zugrunde, ein luftspaltisoliertes Abgasrohr mit Dehnungskompensator dahingehend weiterzubilden, dass axiale und laterale Belastungen schadensfrei aufgefangen werden können.In contrast, lies The invention is based on the object, an air gap insulated exhaust pipe with expansion compensator to the effect that axial and lateral loads can be absorbed without damage.
Die Aufgabe ist erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.The Task is inventively by the features of claim 1 solved.
Infolge der Ausbildung eines Schiebesitzes jeweils für die Außenrohre und die Innenrohre unter Beabstandung der Außenrohre von den Innenrohren ist das Abgasrohr fähig, ohne weiteres Wärmedehnungen und axiale Belastungen in Längsrichtung des Abgasrohres aufzufangen sowie gleichzeitig schadensträchtige Deformationen des Abgasrohres durch lateral wirkende Belastungen in einer derartigen Weise zu begrenzen, dass keine übermäßigen Verspannungen der Innenrohre, die zu Rissbildungen führen könnten, auftreten. Durch die Führung der Außenrohre mittels des Schiebesitzes ineinander ist ganz besonders der Dehnungskompensator vor lateral schädlich wirkenden Belastungen geschützt. Des weiteren ist durch die Überdeckung der Außenrohre gewährleistet, dass keine Heißgase aus dem Abgasrohr radial entweichen können, was einen besonderen Schutz für das Abgasrohr umliegende leicht entflammbare Fahrzeugmaterialien bedeutet. Der Dehnungskompensator, der in Form eines Metallbalges ausgebildet ist, ist durch die Erfindung im wesentlichen nur den axialen Kräften, die aus der Wärmedehnung resultieren, ausgesetzt. Des weiteren kann der Dehnungskompensator nun aus kostengünstigeren Materialien hergestellt werden, die nicht den hohen Ansprüchen hinsichtlich der lateralen und axialen Belastbarkeit genügen müssen.As a result the formation of a sliding seat respectively for the outer tubes and the inner tubes under spacing of the outer tubes from the inner tubes, the exhaust pipe is capable of easily thermal expansion and axial loads in the longitudinal direction catch the exhaust pipe and at the same time damaging deformations the exhaust pipe by laterally acting loads in such Way to limit that no excessive tension the inner tubes, which could lead to cracking, occur. By the guide the outer tubes By means of the sliding seat into each other is especially the expansion compensator before laterally harmful protected against acting loads. Furthermore, by the overlap ensures the outer tubes, that no hot gases can escape radially from the exhaust pipe, which is a special protection for the exhaust pipe surrounding easily inflammable vehicle materials means. The expansion compensator, which is designed in the form of a metal bellows is, is by the invention essentially only the axial forces, the from the thermal expansion result, suspended. Furthermore, the expansion compensator now from cheaper materials are produced that do not meet the high standards of lateral and axial load capacity suffice have to.
In einer besonders bevorzugten Ausgestaltung der Erfindung nach Anspruch 2 ist das Spiel zwischen den Innenrohren größer als das zwischen den Außenrohren. Durch das relativ große Spiel zwischen den Innenrohren im Vergleich zu den Außenrohren und der damit erreichten erhöhten lateralen Beweglichkeit der Innenrohre zueinander wird eine Verspannung infolge lateraler Belastungen praktisch gänzlich verhindert und damit die Lebensdauer des Abgasrohres weiter erhöht.In a particularly preferred embodiment of the invention according to claim 2, the clearance between the inner tubes is greater than that between the outer tubes. Due to the relatively large Play between the inner tubes compared to the outer tubes and thus increased lateral mobility of the inner tubes to each other becomes a strain almost completely prevented due to lateral loads and thus the life of the exhaust pipe further increased.
Nachfolgend ist die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert; dabei zeigt die Figur in einem Längsschnitt ein erfindungsgemäßes Abgasrohr mit einem faltenbalgartigen Dehnungskompensator in Zusammenbaulage der Rohrabschnitte.following the invention with reference to an embodiment shown in the drawing explained in more detail; there shows the figure in a longitudinal section an inventive exhaust pipe with a bellows-type expansion compensator in assembly position the pipe sections.
In
der Figur ist ein luftspaltisoliertes Abgasrohr
Der
Teilabschnitt
Der
Rohrabschnitt
Zur
Montage werden die Außenrohre
Im
Bereich ihrer Schiebesitze
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410021894 DE102004021894B4 (en) | 2004-05-04 | 2004-05-04 | Air gap insulated exhaust pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410021894 DE102004021894B4 (en) | 2004-05-04 | 2004-05-04 | Air gap insulated exhaust pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102004021894A1 true DE102004021894A1 (en) | 2005-12-08 |
DE102004021894B4 DE102004021894B4 (en) | 2007-03-22 |
Family
ID=35335840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200410021894 Expired - Fee Related DE102004021894B4 (en) | 2004-05-04 | 2004-05-04 | Air gap insulated exhaust pipe |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102004021894B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021002044A1 (en) | 2021-04-19 | 2022-10-20 | Daimler Truck AG | Exhaust system for an internal combustion engine of a motor vehicle and method for operating such an exhaust system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5331810A (en) * | 1992-05-21 | 1994-07-26 | Arvin Industries, Inc. | Low thermal capacitance exhaust system for an internal combustion engine |
DE19825798C1 (en) * | 1998-06-10 | 1999-12-16 | Porsche Ag | Test bench for exhaust systems of an internal combustion engine |
DE10157131A1 (en) * | 2001-11-21 | 2003-06-05 | Benteler Automobiltechnik Gmbh | Exhaust pipe and method for manufacturing an exhaust pipe |
-
2004
- 2004-05-04 DE DE200410021894 patent/DE102004021894B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5331810A (en) * | 1992-05-21 | 1994-07-26 | Arvin Industries, Inc. | Low thermal capacitance exhaust system for an internal combustion engine |
DE19825798C1 (en) * | 1998-06-10 | 1999-12-16 | Porsche Ag | Test bench for exhaust systems of an internal combustion engine |
DE10157131A1 (en) * | 2001-11-21 | 2003-06-05 | Benteler Automobiltechnik Gmbh | Exhaust pipe and method for manufacturing an exhaust pipe |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021002044A1 (en) | 2021-04-19 | 2022-10-20 | Daimler Truck AG | Exhaust system for an internal combustion engine of a motor vehicle and method for operating such an exhaust system |
Also Published As
Publication number | Publication date |
---|---|
DE102004021894B4 (en) | 2007-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2662538B1 (en) | Connection of a double-walled turbocharger housing | |
DE19722603C1 (en) | More durable flexible tube section for hot exhaust gases from vehicular internal combustion engines | |
EP2075432B1 (en) | Exhaust collector and associated manufacturing method | |
WO2010081697A1 (en) | Connection assembly of a turbine housing to a bearing housing and exhaust gas turbocharger | |
DE19923557B4 (en) | A built air gap insulated exhaust manifold of an exhaust system of a motor vehicle and a method for its production | |
DE10157131C2 (en) | Exhaust pipe and method for manufacturing an exhaust pipe | |
EP0662564A1 (en) | Air gap insulation exhaust pipe and method of construction | |
EP0410089B1 (en) | Flexible pipe component for exhaust conduits of internal combustion engines used on vehicles | |
DE102005036676A1 (en) | Silencer for the exhaust system of a motor vehicle | |
DE102013106075B4 (en) | Device for the vibration-decoupled connection of two devices of an exhaust system | |
EP2375017B1 (en) | Method for manufacturing an automobile muffler and automobile muffler | |
EP0837230B1 (en) | Exhaust conduit | |
DE102014110101A1 (en) | MUFFLER | |
DE102004021894B4 (en) | Air gap insulated exhaust pipe | |
DE102010037772A1 (en) | Winding hose for insulating exhaust gas pipe element for exhaust system of e.g. passenger car, has different preprofiled metal bands including band windings circularly connected by solder material in parts around specific degrees | |
EP2851533B1 (en) | Flexible pipe element | |
EP1531242A2 (en) | Decoupling element for exhaust systems | |
EP2894312A1 (en) | Flexible pipe component with insulation | |
DE4224499C2 (en) | Flange connection between two exhaust gas-carrying parts | |
DE102014011606A1 (en) | Exhaust system for an internal combustion engine | |
EP2868888B1 (en) | Connection of conduit elements | |
EP3828397B1 (en) | Connecting unit | |
WO2019038182A1 (en) | Heat shield having a sealing element | |
DE102016111561A1 (en) | Connecting device for gas-tight connection of tubular and / or nozzle-shaped components | |
WO2004038273A1 (en) | Arrangement for joining a first pipe to a second pipe |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE |
|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
|
8320 | Willingness to grant licenses declared (paragraph 23) | ||
R085 | Willingness to license withdrawn | ||
R081 | Change of applicant/patentee |
Owner name: PATENTPORTFOLIO S. A. R. L., LU Free format text: FORMER OWNER: DAIMLER AG, 70327 STUTTGART, DE Effective date: 20110923 |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: F01N0007080000 Ipc: F01N0013080000 |