EP0358548A1 - Schalldämpfergehäuse für Abgase von Brennkraftmaschinen - Google Patents

Schalldämpfergehäuse für Abgase von Brennkraftmaschinen Download PDF

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Publication number
EP0358548A1
EP0358548A1 EP89402345A EP89402345A EP0358548A1 EP 0358548 A1 EP0358548 A1 EP 0358548A1 EP 89402345 A EP89402345 A EP 89402345A EP 89402345 A EP89402345 A EP 89402345A EP 0358548 A1 EP0358548 A1 EP 0358548A1
Authority
EP
European Patent Office
Prior art keywords
section
casing
envelope
exhaust gases
bead
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Withdrawn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
EP89402345A
Other languages
English (en)
French (fr)
Inventor
Jacques Alexandre
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.)
Luchaire SA
Original Assignee
Luchaire SA
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 Luchaire SA filed Critical Luchaire SA
Publication of EP0358548A1 publication Critical patent/EP0358548A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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 exhaust gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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 exhaust gas passages, pipes or tubes
    • F01N2470/10—Tubes having non-circular cross section

Definitions

  • the present invention relates to sound attenuation chambers generated by the exhaust gases of an internal combustion engine, whether they are mufflers with sound attenuation lining consisting of a baffling assembly with or without materials fibrous or that they are unfilled resonators.
  • the gases enter the chamber through an inlet tube and exit from it through an outlet tube, the positions of which can be very diverse on the envelope constituting the chamber.
  • the second case only one inlet tube is provided.
  • a noise reduction chamber is delimited by an envelope, often of tubular shape. At least one of the front faces is closed by a bottom which is retained there by a fixing, in particular by a crimping bead comprising two successive folds at 180 °.
  • the crimping technique offers the advantage of great simplicity of manufacture, while giving a satisfactory seal unlike a simple casing as described in USA-2950777 and FR-2335696. But it can have a drawback. Explosions due to exhaust gases occur in the sound attenuation chamber. They apply pressure forces to the bottoms which tend to detach them from the casing or at least to damage the seal. It would be desirable to increase the resistance when tearing off the bottoms, without however increasing the sheet thicknesses, as much for reasons of weight and useful volume of the silencer as for material consumption, nor for the radial bulk.
  • the invention provides for this by the fact that the part of the envelope, which leaves the crimping bead and which is therefore immediately adjacent thereto, converges towards the bottom.
  • This simple folding down has the surprising effect of increasing, all other things being equal, the resistance to tearing out of the bottom by about 30%, as can be determined by conventional explosion and tearing tests. automakers.
  • the length and / or the angle of convergence which is advantageously from 15 to 35 °, are such that the outline of the fixing bead is inscribed in the outside outline of the envelope.
  • This angle is that made by a generator of the converging part and the corresponding generator of the non-converging part of the envelope.
  • the silencer drawn in Figures 1 and 2 comprises a casing 1 made of sheet metal with an oval cross section.
  • a baffling assembly 2 is housed in the casing 1.
  • the casing 1 is formed by two bottoms 3 made of sheet metal retaining the casing by a crimping which will be described in more detail with reference to FIG. 4
  • the exhaust gases enter the envelope 1 through an inlet 5 and exit therefrom through a exit 6.
  • the Helmoltz resonator of FIG. 3 comprises a sheet metal casing 1 closed by two bottoms 3 retained by a crimping bead 4.
  • An inlet 5 allows the flow of gas passing through a conduit 7 to be in communication with the cavity of the resonator.
  • the crimping bead 4 is obtained by folding a convex end portion of the casing 1 together with the periphery of the bottom 3, as shown in FIG. 4.
  • a first section 8 makes an angle of 25 ° with the axis of the silent and is bent 180 ° outwards in a bend 9, then ends in a section 10 substantially parallel to the section 8.
  • the section 8 and the section 10 enclose an end section 11 of the periphery of the bottom 3.
  • the section 11 is extended by a bend 12 at 180 ° approximately in an intermediate section 13 parallel to section 10.
  • Section 11 and section 13 enclose section 10.
  • the outermost face of section 13 and elbow 12 is in the extension of the non-convergent part of the envelope 1.
  • the section 13 continues with a curved section 14, then by a section 15 parallel to the section 8.
  • the section 15 and the section 11 enclose the section 8.
  • the section 15 is connected to a section 16 perpen dicular to the axis of the casing 1 by a bend 17.
  • the section 16 is connected by a fillet 18 to the main part 19 of the bottom 3.
  • the section 16 is closer to the opposite bottom of the casing 1 than the part main 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP89402345A 1988-09-09 1989-08-25 Schalldämpfergehäuse für Abgase von Brennkraftmaschinen Withdrawn EP0358548A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8811795 1988-09-09
FR8811795A FR2636369B1 (fr) 1988-09-09 1988-09-09 Chambre d'attenuation du son engendre par les gaz d'echappement d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP0358548A1 true EP0358548A1 (de) 1990-03-14

Family

ID=9369862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402345A Withdrawn EP0358548A1 (de) 1988-09-09 1989-08-25 Schalldämpfergehäuse für Abgase von Brennkraftmaschinen

Country Status (2)

Country Link
EP (1) EP0358548A1 (de)
FR (1) FR2636369B1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635506A (en) * 1925-05-20 1927-07-12 James Merle Finney Process of and machine for making containers
US2717048A (en) * 1951-08-28 1955-09-06 Oldberg Mfg Company Muffler with vibration damping shell
US2950777A (en) * 1956-08-01 1960-08-30 Oldberg Mfg Company Silencer or muffler
FR2144660A1 (de) * 1971-07-08 1973-02-16 Rheinpfalzische Blech
FR2270445A1 (de) * 1974-05-10 1975-12-05 Itt
US3945460A (en) * 1974-09-03 1976-03-23 Arvin Industries, Inc. Muffler with rupture control means
FR2335696A1 (fr) * 1975-12-18 1977-07-15 Peugeot Cycles Silencieux d'echappement, notamment pour vehicule a moteur thermique
DE3705878A1 (de) * 1986-02-25 1987-09-03 Hokkai Can Vorrichtung zum herstellen eines gefalzten behaelters mit einem doppelfalz an einem behaelter-deckel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635506A (en) * 1925-05-20 1927-07-12 James Merle Finney Process of and machine for making containers
US2717048A (en) * 1951-08-28 1955-09-06 Oldberg Mfg Company Muffler with vibration damping shell
US2950777A (en) * 1956-08-01 1960-08-30 Oldberg Mfg Company Silencer or muffler
FR2144660A1 (de) * 1971-07-08 1973-02-16 Rheinpfalzische Blech
FR2270445A1 (de) * 1974-05-10 1975-12-05 Itt
US3945460A (en) * 1974-09-03 1976-03-23 Arvin Industries, Inc. Muffler with rupture control means
FR2335696A1 (fr) * 1975-12-18 1977-07-15 Peugeot Cycles Silencieux d'echappement, notamment pour vehicule a moteur thermique
DE3705878A1 (de) * 1986-02-25 1987-09-03 Hokkai Can Vorrichtung zum herstellen eines gefalzten behaelters mit einem doppelfalz an einem behaelter-deckel

Also Published As

Publication number Publication date
FR2636369B1 (fr) 1994-01-07
FR2636369A1 (fr) 1990-03-16

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