EP0334168B1 - Dispositif d'échappement pour véhicules à moteur - Google Patents

Dispositif d'échappement pour véhicules à moteur Download PDF

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Publication number
EP0334168B1
EP0334168B1 EP89104504A EP89104504A EP0334168B1 EP 0334168 B1 EP0334168 B1 EP 0334168B1 EP 89104504 A EP89104504 A EP 89104504A EP 89104504 A EP89104504 A EP 89104504A EP 0334168 B1 EP0334168 B1 EP 0334168B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
exhaust system
metal casing
metal jacket
fixed bearing
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
Application number
EP89104504A
Other languages
German (de)
English (en)
Other versions
EP0334168A1 (fr
Inventor
Georg Dipl.-Ing. Reuther
Harald Dipl.-Ing. Bressler
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.)
Tenneco GmbH
Original Assignee
Heinrich Gillet 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 Heinrich Gillet GmbH filed Critical Heinrich Gillet GmbH
Publication of EP0334168A1 publication Critical patent/EP0334168A1/fr
Application granted granted Critical
Publication of EP0334168B1 publication Critical patent/EP0334168B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N13/14—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

Definitions

  • the invention relates to an exhaust system for motor vehicles according to the preamble of claim 1.
  • an insulating layer made of mineral wool or ceramic fleece etc. is placed on top, which is covered, held and protected on the outside by a sheet metal jacket.
  • the ends of the sheet metal jacket are either connected on both sides or - if significant thermal expansion differences between the exhaust system and sheet metal jacket are to be expected - on one side with the exhaust system by means of several tack welding spots (DE-A-25 52 647).
  • the low durability of the usual welded joints has several reasons.
  • the different material thickness of the exhaust system usually about 2 mm
  • the sheet metal jacket usually only 0.5 mm
  • the sheets mostly consist of different materials, eg. B. stainless steel for the exhaust system and mild steel for the sheet metal jacket, and are often covered with an aluminum layer as corrosion protection.
  • the loose sheet metal jacket carries out unevenness in the road and the like relative to the insulating layer and the exhaust system.
  • the insulating layer is damaged and loses its effect.
  • moisture and dirt can get into the space between the exhaust system and the insulation sheet metal jacket and trigger undesirable corrosion.
  • the sheet metal jacket always executes such relative movements on the loose side.
  • the above-mentioned DE-A-25 52 647 therefore proposes to reinforce the exhaust gas-carrying pipe by means of a plurality of plug-on and welded pipe pieces, and the free end of the sheet metal jacket by means of a metal ring which is welded inside.
  • the metal ring should slide over the pipe sections according to the difference in thermal expansion. If there is little play in the reinforcement ring compared to the pipe sections, corrosion, dirt and thermal expansion will quickly block its ability to move. If there is sufficient play in the reinforcement ring, water and dirt cannot be prevented from penetrating.
  • the present invention has for its object to improve the connections between the exhaust system and the sheet metal jacket in every respect.
  • Embodiments of the invention in the area of the fixed bearing with material reinforcement are the subject of dependent claims 2 to 4.
  • Embodiments of the invention in the area of the floating bearing are the subject of subclaims 5 to 7, subclaims 6 and 7 show solutions which limit the longitudinal movements of the free end of the sheet metal jacket, caused by thermal expansion differences, by engine vibrations, by exhaust gas pulsations, etc.
  • a housing 1 for example a muffler or catalytic converter, which is connected to exhaust pipes 2 on the inlet and outlet sides.
  • the Gezzasue 1 is surrounded by an insulating shell, which consists of an insulating layer 3 and a thin sheet metal jacket 4.
  • the mechanical connection between the sheet metal jacket 4 and the exhaust pipes 2 of the exhaust system is made on the left side by a fixed bearing 6, on the right side by a floating bearing 7.
  • the floating bearing 7 allows the stress-free compensation of thermal expansion differences between the housing 1 and the sheet metal jacket 4.
  • connection between the sheet metal jacket 4 and the exhaust pipe 2 is made by a clamping ring 8.5, which presses the end of the sheet metal jacket 4 into a circumferential bead 2.1.
  • the ends 8.6 of the clamping ring 8.5 can be welded together to increase the fatigue strength.
  • Such a connection is almost as tight and stable as a welded connection, but can be established more quickly.
  • the known problems with welded joints _ structural changes, low mechanical strength, increased Susceptibility to corrosion _ do not occur.
  • Fig. 2 shows this connection in cross section.
  • a labyrinthine gap seal was realized with the aid of a sleeve ring 9.1, which is welded to the exhaust pipe 2 on one side. Clamping is also possible.
  • the sleeve ring 9.1 overlaps the end 4.1 of the sheet metal jacket 4. This connection is largely protected against the ingress of moisture and dirt and against the escape of insulating material 3. Furthermore, no rattling noises can occur. Dynamic relative movements between the housing 1 and the sheet metal jacket 4 are reduced to a minimum, so that a long service life of the same can be expected even when using insulating material 3 of low mechanical strength.
  • Fig. 3 shows on the side of the fixed bearing 6 a variant of the mechanical connection without welding.
  • a circumferential bead 2.1 is introduced into the exhaust pipe 2.
  • a sleeve 8.2 is placed over the end of the sheet metal jacket 4 and pressed into the surrounding bead 2.1.
  • the sliding sleeve 9.1 carries a circumferential groove 9.2 into which the end 4.2 of the sheet metal jacket 4, which is bent outwards, engages. This limits the free mobility of the end 4.2 of the sheet metal jacket 4 in both directions; the sheet metal jacket 4 remains securely held in the sleeve ring 9.1 even under extreme loads.
  • Fig. 4 in longitudinal section and Fig. 5 in cross section show a third embodiment for a fixed bearing 6.
  • the end of the sheet metal jacket 4 is here with the help of a wide clamping ring 8.7 fastened on the exhaust pipe 2, the mechanical tension being introduced into the clamping ring 8.7 by forming beaded ears 8.8.

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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)

Claims (7)

1. Installation de gaz d'échappement (1, 2) de véhicules automobiles, constituée de boîtiers (1) et/ou de tuyaux (2) acheminant les gaz d'échappement, lesquels sont entourés d'une enveloppe de tôle (4) réalisée dans une tôle relativement fine, entre l'installation pour gaz d'échappement (1, 2) et l'enveloppe de tôle (4), un palier fixe (6) étant formé sur un côté et un palier libre (7) sur l'autre côté, caractérisée en ce que le palier fixe (6) servant d'assemblage par serrage comporte un anneau de serrage (8), placé sur l'enveloppe de tôle (4), le palier libre (7) servant d'étanchéité à fente est un anneau formant manchon (9), passant sur et guidant l'extrémité libre (4.1, 4.2, 4.3) de l'enveloppe de tôle (4), lequel anneau formant manchon est relié, sur l'autre côté, avec l'installation de gaz d'échappement (1, 2).
2. Installation de gaz d'échappement selon la revendication 1, caractérisée en ce que le palier fixe (6) est un manchon (8.2) placé dans une moulure en creux.
3. Installation de gaz d'échappement selon la revendication 1, caractérisée en ce que le palier fixe (6) est un anneau de serrage (8, 7) avec oreilles (8.8) moulurées.
4. Installation de gaz d'échappement selon la revendication 1, caractérisée en ce que le palier fixe (6) est un anneau (8.5) serré.
5. Installation de gaz d'échappement selon l'une des revendications 1 à 4, caractérisée en ce que l'extrémité libre (4.3) de l'enveloppe de tôle (4) est ondulée.
6. Installation de gaz d'échappement selon l'une des revendications 1 à 5, caractérisée en ce qu'il est prévu sur l'anneau forçant manchon (9.1), une rainure annulaire (9.2) qui limite le libre déplacement de l'extrémité évasée de l'enveloppe de tôle (4).
7. Installation de gaz d'échappement selon l'une des revendications 1 à 5, caractérisée en ce qu'il est prévu sur le boîtier (1) ou le tuyau (2), une rainure annulaire qui limite le libre déplacement de l'extrémité évasée de l'enveloppe de tôle (4).
EP89104504A 1988-03-19 1989-03-14 Dispositif d'échappement pour véhicules à moteur Expired - Lifetime EP0334168B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809324 1988-03-19
DE3809324A DE3809324A1 (de) 1988-03-19 1988-03-19 Abgasanlage fuer kraftfahrzeuge

Publications (2)

Publication Number Publication Date
EP0334168A1 EP0334168A1 (fr) 1989-09-27
EP0334168B1 true EP0334168B1 (fr) 1991-05-22

Family

ID=6350207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104504A Expired - Lifetime EP0334168B1 (fr) 1988-03-19 1989-03-14 Dispositif d'échappement pour véhicules à moteur

Country Status (3)

Country Link
EP (1) EP0334168B1 (fr)
DE (2) DE3809324A1 (fr)
ES (1) ES2023517B3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2653491B1 (fr) * 1989-10-24 1994-05-06 Wimetal Sa Ligne d'echappement notamment pour vehicule automobile.
FR2655392B1 (fr) * 1989-12-04 1992-02-28 Wimeral Sa Dispositif pour la fixation d'un ecran de protection thermique sur une ligne d'echappement.
DE4033711C2 (de) * 1990-10-24 1994-01-27 Daimler Benz Ag Wärmedämmung für eine Gehäusewand
DE102019114999A1 (de) * 2019-06-04 2020-12-10 Friedrich Boysen Gmbh & Co. Kg Baueinheit für ein Strukturbauteil, insbesondere eine Abgasanlage, eines Fahrzeugs oder für eine stationäre Abgasanlage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478783A (en) * 1967-03-27 1969-11-18 Robert Redford Doyle Thermally insulated piping system
FR2114732A5 (fr) * 1970-11-20 1972-06-30 Alfa Romeo Spa
US3727410A (en) * 1971-12-03 1973-04-17 Arvin Ind Inc Exhaust gas manifold
GB1526963A (en) * 1974-11-26 1978-10-04 Fuji Heavy Ind Ltd Exhaust systems for internal combustion engines
US4345430A (en) * 1979-11-15 1982-08-24 Manville Service Corporation Automotive catalytic converter exhaust system
DE3537080C1 (en) * 1985-10-18 1987-06-19 Benteler Werke Ag Exhaust pipe with built-in exhaust gas catalyst - and outer insulation coating contg. evacuated cavity with chamber filled with better alloy

Also Published As

Publication number Publication date
EP0334168A1 (fr) 1989-09-27
DE3809324A1 (de) 1989-09-28
DE58900121D1 (de) 1991-06-27
ES2023517B3 (es) 1992-01-16

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