EP1888890A1 - Conduite de gaz d'echappement isolee par couche d'air - Google Patents

Conduite de gaz d'echappement isolee par couche d'air

Info

Publication number
EP1888890A1
EP1888890A1 EP06723854A EP06723854A EP1888890A1 EP 1888890 A1 EP1888890 A1 EP 1888890A1 EP 06723854 A EP06723854 A EP 06723854A EP 06723854 A EP06723854 A EP 06723854A EP 1888890 A1 EP1888890 A1 EP 1888890A1
Authority
EP
European Patent Office
Prior art keywords
vehicle exhaust
exhaust pipe
seal
tube
pipe according
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.)
Withdrawn
Application number
EP06723854A
Other languages
German (de)
English (en)
Inventor
Winfried Willeke
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.)
Faurecia Emissions Control Technologies Germany GmbH
Original Assignee
Emcon Technologies Germany Augsburg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emcon Technologies Germany Augsburg GmbH filed Critical Emcon Technologies Germany Augsburg GmbH
Publication of EP1888890A1 publication Critical patent/EP1888890A1/fr
Withdrawn legal-status Critical Current

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
    • F01N13/18—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
    • F01N13/1827—Sealings specially adapted for exhaust systems
    • 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
    • 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
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled

Definitions

  • the invention relates to an air gap-insulated vehicle exhaust pipe, comprising an outer tube and at least one disposed in the outer tube, radially spaced therefrom, exhaust-carrying inner tube and a flange which is attached to one end of a first of the two tubes, wherein the second of the two tubes the flange can perform a relative movement.
  • Such air gap insulated vehicle exhaust pipes are used in particular in the manifold area. They have the advantage that the thermal load on the outer tube, which is usually the mechanically bearing part, is reduced compared to a single-walled design.
  • inner tube must be movable towards the outer tube in order to be able to compensate for the different thermal loads associated with the different thermal expansions of the tubes.
  • inner tube is to be understood as inner tube and not limited to a singular circumferentially closed tube.
  • the object of the invention is to further reduce the thermal stress exerted on the outer tube.
  • the hitherto provided annular gap is at least largely closed at the downstream end of the inner tube between this and the outer tube.
  • the seal is not designed so that the outer and inner tube are immovable to each other, but it also allows a relative movement of the tubes at this end, both in axial direction as well as in the radial direction.
  • the amount of exhaust gas, which can pass through the annular gap in the air gap between the inner and outer tube and the outer tube thermally stressed, is negligible by the invention.
  • the seal is preferably housed in a circumferential groove from which it protrudes to engage the second tube.
  • the circumferential groove ensures in particular for a secure positioning of the seal.
  • the seal is a slotted ring, similar to a piston ring.
  • the seal can be easily engaged in a groove or attach to a pipe under permanent bias.
  • the ring is also made of a stiff or, in other words, non-rubber-elastic material, in particular metal.
  • a stiff or, in other words, non-rubber-elastic material in particular metal.
  • the seal should preferably sit in the groove with radial play. That is, it sits firmly in the radial direction on the second tube and moves with it in the groove, as e.g. in a piston ring is the case.
  • a further improvement of the sealing effect can be achieved if the seal rests on the second tube with radial clearance.
  • the first tube is the outer tube, so that the flange is used for attachment of the outer, mechanically bearing tube.
  • the vehicle exhaust gas line is in particular curved, which ensures that the greater longitudinal extent (due to the higher temperature in operation) of the inner tube on its differently oriented portions into an axial and a radial displacement of the free end of the inner tube in the region of the seal divides.
  • a further embodiment of the invention provides that the inner tube is divided to form at least two side-by-side exhaust ducts.
  • the inner tube channel has several strands
  • FIG. 1 shows a longitudinal sectional view through the downstream end of an exhaust pipe according to the invention
  • FIG. 2 shows an enlarged view of the exhaust pipe according to FIG. 1 in the region of the flange
  • Figure 3 is a perspective top view of the downstream end of the inner tube of a vehicle exhaust pipe according to a second embodiment of the invention.
  • FIG. 4 is a top perspective view of the downstream end of FIG.
  • an air gap-insulated vehicle exhaust pipe is seen in the form of a manifold, with only the downstream end is shown.
  • the visible outer skin of the exhaust pipe is formed by an outer tube 3, which may also be composed of peripherally connected shells.
  • an inner tube 5 is arranged, which, relative to the central axis A of the conduit radially spaced on all sides of the tube 3 and in the is arranged substantially coaxially with this.
  • an additional inner tube 7 is inserted, which extends to the inlet end, not shown, of the exhaust pipe.
  • the tube 5 has an orifice 9, in which a laterally extending further inner tube (not shown), which is assigned to another cylinder chamber and also in the tube. 3 runs, flows.
  • the tubes 3, 5 are bent transversely to the axis A by about 90 °, so that the exhaust pipe is curved.
  • a flange 11 is immovably fixed to the pipe 3, e.g. by
  • the flange 11 has a flow opening 13 into which the downstream end of the tube 5 protrudes.
  • FIG. 2 shows the downstream end of the exhaust pipe in detail.
  • the diameter of the flow opening 13 is greater than the outer diameter of the tube 5, so that an annular gap 15 is formed between these parts.
  • This annular gap 15 is closed largely gas-tight by a seal 17 in the form of a sealing ring, so that the exhaust gas via the annular gap 15 can not get into the air gap 8 between the tubes 3, 5.
  • the seal 17 is a slotted ring which is movably received in a radially in the axial direction fitting groove 19 in the radial direction. Between groove bottom (lowest point of the groove) and the outside of the seal 17, a gap is provided for this purpose. In the axial direction, the seal 17 is received almost without play in the groove 19.
  • the seal 17 abuts the outer circumference of the tube 5 over a completely or nearly closed circumference.
  • the seal 17 is designed as a non-rubber-elastic ring made of rigid material, in particular metal.
  • the mounting of the ring and the groove allows axial and radial relative movement of the downstream end of the tube 5 to the tube 3, by the tube 5 can slide along the seal 17 in the axial direction and entrains the seal 17 in a radial movement.
  • the inner tube 3 or the inner tube is composed of two functionally parallel individual tubes 3 ', 3 "or divided into two individual tubes 3', 3".
  • the two individual pipes 3', 3" represent exhaust gas channels and guide the exhaust gas from different cylinders through a common outer pipe 5 , which may also be composed of shells.
  • the D-shaped downstream ends of the individual tubes 3 ', 3 ", are connected together along their flat sides and open into the flange 11.
  • the seal 17 follows under the individual tubes 3', 3" exactly the course of the composite outer contour and has extensions 27, which penetrate into a tapered tube gap. Good to see is also the slot 29. This slot 29 may also be present in the assembled state to ensure a steady bias of the sealing ring on the inner tube 3.

Landscapes

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

Abstract

La présente invention concerne une conduite de gaz d'échappement isolée par couche d'air comprenant un tube externe (3) et un tube interne (5) entre lesquels une couche d'air (8) est formée. Un rebord (11) est appliqué sur un des deux tubes (3) et un joint (17) est placé entre le rebord (11) et l'autre tube (5). Ce joint rend la couche d'air (8) étanche dans une large mesure vers l'extérieur et autorise également, en cas de dilatation thermique, un déplacement relatif en direction axiale et en direction radiale entre le rebord (11) et l'autre tube (5) en fonctionnement de roulement.
EP06723854A 2005-05-12 2006-03-30 Conduite de gaz d'echappement isolee par couche d'air Withdrawn EP1888890A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005022114A DE102005022114A1 (de) 2005-05-12 2005-05-12 Luftspaltisolierte Fahrzeugabgasleitung
PCT/EP2006/002887 WO2006119824A1 (fr) 2005-05-12 2006-03-30 Conduite de gaz d'echappement isolee par couche d'air

Publications (1)

Publication Number Publication Date
EP1888890A1 true EP1888890A1 (fr) 2008-02-20

Family

ID=36499583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06723854A Withdrawn EP1888890A1 (fr) 2005-05-12 2006-03-30 Conduite de gaz d'echappement isolee par couche d'air

Country Status (6)

Country Link
US (1) US20080203725A1 (fr)
EP (1) EP1888890A1 (fr)
KR (1) KR20080007661A (fr)
CN (1) CN101175908A (fr)
DE (1) DE102005022114A1 (fr)
WO (1) WO2006119824A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2876147B1 (fr) * 2004-10-01 2011-04-22 Faurecia Sys Echappement Conduit d'echappement
KR100993376B1 (ko) * 2007-07-06 2010-11-09 기아자동차주식회사 엔진의 터보 챠지 시스템
DE102007048560A1 (de) * 2007-10-09 2009-04-23 Audi Ag Vorrichtung zum Nachbehandeln von Abgasen einer magerlauffähigen Brennkraftmaschine
US7739839B1 (en) * 2007-12-20 2010-06-22 Crabtree Joshua P Down spout safety edge system
DE102008061870B4 (de) * 2008-12-15 2015-10-22 Carl Freudenberg Kg Dichtring, Dichtungsanordnung mit einem Dichtring und Verwendung einer Dichtungsanordnung und eines Dichtrings
DE102009011379B4 (de) * 2009-03-05 2012-07-05 Benteler Automobiltechnik Gmbh Abgasbaugruppe
DE102010013412B4 (de) * 2010-03-30 2014-05-22 Norma Germany Gmbh Abgasleitung für ein Kraftfahrzeug und Abgasanlage
DE102010015271A1 (de) * 2010-04-15 2011-10-20 J. Eberspächer GmbH & Co. KG Abgasbehandlungseinrichtung
CN105026718B (zh) * 2013-02-28 2018-03-30 佛吉亚排放控制技术美国有限公司 具有涡轮增压器支承件的排气歧管
DE102015113159A1 (de) * 2015-08-10 2017-02-16 Faurecia Emissions Control Technologies, Germany Gmbh Bauteil einer Abgasanlage
WO2019222306A2 (fr) * 2018-05-15 2019-11-21 Cummins Inc. Joint de bride intégré à double paroi
CN110107390B (zh) * 2019-05-21 2020-06-09 三七知明(北京)科技有限公司 一种汽车排气管连通处的密封装置
CN112227019B (zh) * 2019-07-15 2024-05-28 青岛海尔洗衣机有限公司 一种出液结构、洗涤添加剂盒及洗衣机

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See references of WO2006119824A1 *

Also Published As

Publication number Publication date
WO2006119824A1 (fr) 2006-11-16
DE102005022114A1 (de) 2006-11-16
CN101175908A (zh) 2008-05-07
US20080203725A1 (en) 2008-08-28
KR20080007661A (ko) 2008-01-22

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