EP0072886B1 - Schalldämpfer ohne Schweissverbindung der Stirnwände mit den Rohrstutzen - Google Patents

Schalldämpfer ohne Schweissverbindung der Stirnwände mit den Rohrstutzen Download PDF

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Publication number
EP0072886B1
EP0072886B1 EP82100769A EP82100769A EP0072886B1 EP 0072886 B1 EP0072886 B1 EP 0072886B1 EP 82100769 A EP82100769 A EP 82100769A EP 82100769 A EP82100769 A EP 82100769A EP 0072886 B1 EP0072886 B1 EP 0072886B1
Authority
EP
European Patent Office
Prior art keywords
silencer
inner pipe
pipe
seaming
connection
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
Application number
EP82100769A
Other languages
English (en)
French (fr)
Other versions
EP0072886A1 (de
Inventor
Alfredo Sala
Attilio Marzorati
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.)
Siette Impianti Elettrici Telefonic Soc
Original Assignee
SIETTE Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc
Siette Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11199389&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0072886(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SIETTE Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc, Siette Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc filed Critical SIETTE Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc
Priority to AT82100769T priority Critical patent/ATE25129T1/de
Publication of EP0072886A1 publication Critical patent/EP0072886A1/de
Application granted granted Critical
Publication of EP0072886B1 publication Critical patent/EP0072886B1/de
Expired 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/185—Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
    • 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
    • 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
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof

Definitions

  • the present invention relates to a silencer having a considerable utility and ease of use because of the unwelded connection of the caps and the pipes to the ends of said silencer.
  • the silencers presently available on the market have the considerable drawback of requiring weldings for joining the various components and it is known that welding is a time-consuming, troublesome, expensive and polluting process, requiring also skilled and qualified operators.
  • the quality of the weld affects in a decisive way the performance and operative life of the silencer, and in view of the steadily increasing shortage of skilled qualified welders, it is more and more difficult to produce silencers of a good quality and long-lasting.
  • welding has the intrinsic drawback of altering the material of the workpiece and of its coating (aluminizing) so that it is necessary to carry out again plating of the metal at the welding area after the welding operation.
  • GB-A-2 022 697 discloses a connection between inner tubes of a silencer and exhaust gas tubes by interposition of a stub tube.
  • each silencer requires two additional elements, with greater difficulties in manufacturing the silencer; higher costs of materials and working and above all a lower resistance to flexural and vibratory stress in the connection zone, with a dangerous weakened area in the unsupported portion of the stub tube wall between inner tube and exhaust tube, where a crack may soon appear.
  • FR-A-2173 458 discloses a connection of the exhaust tube effected by deformation of the wall at the point of contact with the silencer end plate. This single point connection has less resistance to mechanical stress and does not allow to interpose a connection tube between silencers, as the seaming tool cannot be inserted inside the tube.
  • FR-A-2 457 969 also shows a connection between an inner pipe and the silencer end plate. It does not shown how the inner tube is connected to the exhaust tube.
  • GB-A-1 214 989 also shows a connection between inner tubes and silencer, effected at the end walls or at the intermediate cross, walls, likewise without any indication regarding the connection of the exhaust tubes.
  • the present invention provides for a strong and stable connection of the elements by fixing the end caps as well as the exhaust pipes to the inner tube but at points spaced along the inner tube in order not to create points of high stress or weakened areas of the tubes, without requiring any additional tube or sleeve.
  • the improved silencer in which an inner pipe (4) is fixed by seaming to the end caps (3) of the silencer, and the incoming exhaust pipe (8) and/or the outgoing tail pipe (8) are in turn fixed by seaming to the corresponding free ends of said inner pipe (4).
  • the free ends of the inner pipe (4) are extending outwardly from the end caps (3) for a length adapted to accommodate said double seaming connection and have a slightly narrower diameter in comparison with the diameter of the part of the inner pipe (4) which is inside the silencer and the two diameters are connected by a slightly conical portion (11), causing an expansion of gases entering the silencer and an acceleration of gases discharged from said silencer.
  • the silencer inner pipe 4 is fixed to the cap 3 by seaming, obtained by cold making with a suitable tool two waves or dimples 5 and 6 between which the edge 7 of the cap bore is clamped, so as to create the stable, safe and resistant connection of said elements, by means of pressure deformation of the two machining surfaces.
  • the pipe 8 which can be either the incoming exhaust pipe from the engine exhaust manifold or the outgoing tail pipe discharging to the atmosphere the exhaust gases, is inserted into or onto the end of said inner pipe 4 and then with an outer seaming operation for the two assembled pipes, two corresponding waves or dimples 9 and 10 are formed on them, so as to mutually clamp them in a stable and safe way.
  • the free ends of the inner pipe 4, extending outwardly from the ends caps 3 for a length adapted to accommodate said double seaming connection, have a slightly narrower diameter in comparison with the diameter of the part of the inner pipe 4 which is inside the silencer and the two diameters are connected by a slightly conical portion 11, causing an expansion of gases entering the silencer and an acceleration of gases discharged from said silencer.

Landscapes

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

Claims (3)

1. Verbesserter Schalldämpfer, bei dem ein Innenrohr (4) durch Verformen an den Abschlussdeckeln (3) des Schalldämpfers befestigt ist, dadurch gekennzeichnet, dass das hineinführende Auspuffrohr (8) und/oder das hinausführende Endrohr (8) ihrerseits durch direkte Formverbindung an den entsprechenden freien Enden des genannten Innenrohrs (4) befestigt sind, wobei sich die freien Enden des Innenrohrs (4) von den Abschlussdeckeln (3) über eine Länge nach aussen hin erstrecken, die geeignet ist zur Aufnahme der genannten beiden Formverbindungen und einen geringfügig engeren Durchmesser im Vergleich zu dem Durchmesser desjenigen Teils des Innenrohrs (4) aufweisen, das sich innerhalb des Schalldämpfers befindet und die beiden Durchmesser über einen leicht konischen Abschnitt (11) miteinander verbunden sind.
2. Verbesserter Schalldämpfer gemäß Anspruch 1, dadurch gekennzeichnet, dass das Innenrohr (4) durch Kaltverformung zwei Wellen von Eintiefungen (5, 6) erhält, zwischen denen der Rand (7) der Bohrung des Schalldämpferdeckels eingeklemmt ist.
3. Verbesserter Schalldämpfer gemäß Anspruch 1, dadurch gekennzeichnet, dass das hineinführende Auspuffrohr (8) und/oder das hinausführende Endrohr (8) in oder auf das freie Ende des Innenrohrs (4) des Schalldämpfers geschoben ist und die beiden zusammengeschobenen Rohre danach durch Kaltverformung zwei einander entsprechende Wellen von Eintiefungen (9, 10) erhalten, durch die diese gegenseitig miteinander verklemmt werden.
EP82100769A 1981-08-20 1982-02-03 Schalldämpfer ohne Schweissverbindung der Stirnwände mit den Rohrstutzen Expired EP0072886B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100769T ATE25129T1 (de) 1981-08-20 1982-02-03 Schalldaempfer ohne schweissverbindung der stirnwaende mit den rohrstutzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI1981U22698U IT8122698U1 (it) 1981-08-20 1981-08-20 Silenziatore perfezionato con attacco senza saldatura dei cappellotti e dei tubi di scarico.
IT2269881U 1981-08-20

Publications (2)

Publication Number Publication Date
EP0072886A1 EP0072886A1 (de) 1983-03-02
EP0072886B1 true EP0072886B1 (de) 1987-01-21

Family

ID=11199389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100769A Expired EP0072886B1 (de) 1981-08-20 1982-02-03 Schalldämpfer ohne Schweissverbindung der Stirnwände mit den Rohrstutzen

Country Status (4)

Country Link
EP (1) EP0072886B1 (de)
AT (1) ATE25129T1 (de)
DE (1) DE3275215D1 (de)
IT (1) IT8122698U1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3415064A1 (de) * 1984-04-21 1985-10-31 Fa. J. Eberspächer, 7300 Esslingen Verfahren zur herstellung eines schalldaempfers
UY25028A1 (es) 1997-06-16 1998-11-20 Delaroy Sdn Bhd Cierre de extremo de tubo
FR2807352B1 (fr) * 2000-04-05 2002-08-02 Ecia Equip Composants Ind Auto Volume d'echappement comportant un tube traversant et procede pour sa fabrication
DE10319189A1 (de) * 2003-04-29 2004-11-18 Robert Bosch Gmbh Elektrische Maschine mit Falzverbindung
DE102006034865B4 (de) * 2006-07-25 2009-08-20 Benteler Automobiltechnik Gmbh Verfahren zum Verbinden einer Flanschplatte mit einem abgasführenden Rohr und Flansch-Rohr-Verbindung
KR100820150B1 (ko) * 2006-11-22 2008-04-08 엘지전자 주식회사 산소발생장치 및 이를 구비한 공기조화기
FI20116018L (fi) * 2011-10-13 2013-04-14 Waertsilae Finland Oy Putkirakenne ja pakokaasujärjestelmä
WO2017132649A1 (en) * 2016-01-28 2017-08-03 Admc Holding, Llc Muffler joint

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1214989A (en) * 1967-10-05 1970-12-09 Quinton Hazell Silencers Ltd Improvements relating to exhaust gas silencers for internal combustion engines
FR2173458A5 (de) * 1972-02-25 1973-10-05 Peugeot
DE2921938A1 (de) * 1977-07-09 1980-12-11 Harmo Ind Ltd Auspuffschalldaempfer und verfahren zur befestigung eines rohrstutzens an einem schalldaempfertopf
GB2022697A (en) * 1978-05-31 1979-12-19 Armstrong Patents Co Ltd Improvements in or relating to exhaust gas silencers for internal combustion engines

Also Published As

Publication number Publication date
ATE25129T1 (de) 1987-02-15
IT8122698V0 (it) 1981-08-20
EP0072886A1 (de) 1983-03-02
IT8122698U1 (it) 1983-02-20
DE3275215D1 (en) 1987-02-26

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