EP0879937A1 - Schalldämpfer für Brennkraftmaschine - Google Patents

Schalldämpfer für Brennkraftmaschine Download PDF

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Publication number
EP0879937A1
EP0879937A1 EP97830232A EP97830232A EP0879937A1 EP 0879937 A1 EP0879937 A1 EP 0879937A1 EP 97830232 A EP97830232 A EP 97830232A EP 97830232 A EP97830232 A EP 97830232A EP 0879937 A1 EP0879937 A1 EP 0879937A1
Authority
EP
European Patent Office
Prior art keywords
muffler
flow
silencer
comes
exhaust
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Withdrawn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
EP97830232A
Other languages
English (en)
French (fr)
Inventor
Claudio Bastelli
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.)
Flli Bastelli SNC Di Bastelli Paolo - Bastelli Claudio & C
Original Assignee
Flli Bastelli SNC Di Bastelli Paolo - Bastelli Claudio & C
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 Flli Bastelli SNC Di Bastelli Paolo - Bastelli Claudio & C filed Critical Flli Bastelli SNC Di Bastelli Paolo - Bastelli Claudio & C
Priority to EP97830232A priority Critical patent/EP0879937A1/de
Publication of EP0879937A1 publication Critical patent/EP0879937A1/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Withdrawn legal-status Critical Current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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • 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
    • F01N13/011—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 two or more purifying devices arranged in parallel
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/04—Metallic wool, e.g. steel wool, copper wool or the like
    • 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
    • F01N2470/02—Tubes being perforated

Definitions

  • the invention refers to a silencer group for dropping of sounds for muffler of internal combustion engines. Said group enormously comes to raise the yield by a considerable increase of the diffusion effect of the exhaust-gas on the absorption walls. Said increase permits using two subsequent expansion openings between which a compression of the same gases is permitted.
  • the current mufflers act on the base of two systems: a reflection system consists of a set of inside bulkheads with separators to determine a circuit and/or sound absorption parts to drop sounds; and an absorption system in which the exhaust-gases pass trought a dropping chamber to be equipped with sound absorption barriers.
  • the reflection system is affected to counterpression effects caused by the flow narrowing provided to the exhaust, while the absorption system permits a small dropping of the sounds such as the contact of the flow of the exhaust-gases with the sound absorption barriers is highly reduced during the use for the clogging of the circuit holes.
  • the above cited problems are resolved by the invented silencer group which permits to realize mufflers using one or more of said silencer groups for dropping the sounds to be assembled in working succession so permitting to put in connection their yield with the different using necessities.
  • the invented group is formed by a pipe 1 obstructed in the middle to a separator 2 to form two equal expansion openings 3 and 4 with diffusion holes 5.
  • the coming in flow of the exhaust-gases passes from the first expansion opening 3 to an outside chamber 6 of a coaxial cilindrical body with closed ends and provided in its outside of a coating 8 in steel wool and long fiber rock wool.
  • the flow of the exhaust-gases through the other diffusion holes 5 comes in getting out into the second diffusion opening 4.
  • the flow of the exhaust-gases through an inlet 9 comes into the first expansion opening 3.
  • said flow comes into a chamber 6 where a high dropping is determined due to the coating 8 of the cilindrical body 7 and to the wrapped up sound absorption wadding 10.
  • FIG. 2 is longitudinal section view of a muffler providing only one silencer group.
  • Fig. 3 is a sectional view taken along the line A-A' of the silencer group.
  • Fig. 4 is a sectional view taken along the line A-A' pf the muffler to show its circular shape.
  • Fig. 5 is a sectional view taken along the line A-A' of a muffler using a group for the dropping of the sounds but with elliptic shape.
  • fig. 6 is longitudinal section view of a muffler using a couple of the invented groups to show the different circuits for dropping the sounds between the distribution chamber 13 and the mixing chamber 14.
  • Fig. 3 is a sectional view taken along the line A-A' of the silencer group.
  • Fig. 4 is a sectional view taken along the line A-A' pf the muffler to show its circular shape.
  • Fig. 5 is a sectional view taken along the line A-A' of a
  • FIG. 7 is a sectional view taken along the line B-B' to show a muffler with a couple of silencer groups with elliptic shape.
  • Fig. 8 is a sectional view taken along the line B-B' of a muffler with a couple of silencer groups with circular shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP97830232A 1997-05-21 1997-05-21 Schalldämpfer für Brennkraftmaschine Withdrawn EP0879937A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97830232A EP0879937A1 (de) 1997-05-21 1997-05-21 Schalldämpfer für Brennkraftmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97830232A EP0879937A1 (de) 1997-05-21 1997-05-21 Schalldämpfer für Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP0879937A1 true EP0879937A1 (de) 1998-11-25

Family

ID=8230640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830232A Withdrawn EP0879937A1 (de) 1997-05-21 1997-05-21 Schalldämpfer für Brennkraftmaschine

Country Status (1)

Country Link
EP (1) EP0879937A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1806485A3 (de) * 2006-01-06 2007-11-07 Yamaha Hatsudoki Kabushiki Kaisha Schalldämpfer und damit ausgerüstetes Fahrzeug
WO2010091656A3 (de) * 2009-02-16 2011-05-19 Man Diesel & Turbo Se Schalldämpfer für eine strömungs- oder kolbenmaschine
WO2022163273A1 (ja) * 2021-01-26 2022-08-04 三恵技研工業株式会社 排気マフラー

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2037718A5 (de) * 1970-03-06 1970-12-31 Lionel Fothergill Develo
US4269800A (en) * 1977-10-18 1981-05-26 Saint-Gobain Industries Process for the preparation of a composite mat consisting of a layer of mineral wool and a layer of steel wool
DE3205185A1 (de) * 1982-02-13 1983-08-25 Wilfried 6238 Hofheim Seitz Verfahren zum herstellen einer schalldaempf-fuellung fuer einen auspufftopf sowie nach diesem verfahren hergestellte schalldaempf-fuellung
US4550799A (en) * 1983-02-22 1985-11-05 Wayne King Muffler for exhaust gases

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2037718A5 (de) * 1970-03-06 1970-12-31 Lionel Fothergill Develo
US4269800A (en) * 1977-10-18 1981-05-26 Saint-Gobain Industries Process for the preparation of a composite mat consisting of a layer of mineral wool and a layer of steel wool
DE3205185A1 (de) * 1982-02-13 1983-08-25 Wilfried 6238 Hofheim Seitz Verfahren zum herstellen einer schalldaempf-fuellung fuer einen auspufftopf sowie nach diesem verfahren hergestellte schalldaempf-fuellung
US4550799A (en) * 1983-02-22 1985-11-05 Wayne King Muffler for exhaust gases

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1806485A3 (de) * 2006-01-06 2007-11-07 Yamaha Hatsudoki Kabushiki Kaisha Schalldämpfer und damit ausgerüstetes Fahrzeug
US7866442B2 (en) 2006-01-06 2011-01-11 Yamaha Hatsudoki Kabushiki Kaisha Muffler and vehicle equipped with muffler
WO2010091656A3 (de) * 2009-02-16 2011-05-19 Man Diesel & Turbo Se Schalldämpfer für eine strömungs- oder kolbenmaschine
WO2022163273A1 (ja) * 2021-01-26 2022-08-04 三恵技研工業株式会社 排気マフラー
JP7478502B2 (ja) 2021-01-26 2024-05-07 三恵技研工業株式会社 排気マフラー

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