EP0802308B1 - Silencieux - Google Patents

Silencieux Download PDF

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Publication number
EP0802308B1
EP0802308B1 EP97105824A EP97105824A EP0802308B1 EP 0802308 B1 EP0802308 B1 EP 0802308B1 EP 97105824 A EP97105824 A EP 97105824A EP 97105824 A EP97105824 A EP 97105824A EP 0802308 B1 EP0802308 B1 EP 0802308B1
Authority
EP
European Patent Office
Prior art keywords
pipe
housing
sound
silencer
absorbing material
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
EP97105824A
Other languages
German (de)
English (en)
Other versions
EP0802308A1 (fr
Inventor
Frieder Kunz
Thomas Olszok
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 EP0802308A1 publication Critical patent/EP0802308A1/fr
Application granted granted Critical
Publication of EP0802308B1 publication Critical patent/EP0802308B1/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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • 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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/20—Chambers being formed inside the exhaust pipe without enlargement of the cross section of the pipe, e.g. resonance chambers

Definitions

  • the invention relates to silencers with a housing and a Housing interior traversing gas-carrying pipe according to the preamble of Claim.
  • Silencers for exhaust systems of internal combustion engines are known. They have the task of reducing the noise leaving the engine to one for the Reduce environmentally compatible measure. They use the physical one Basic principles of absorption, reflection and interference.
  • a silencer which has a housing, a The interior of the housing traversing, gas-carrying pipe and acoustically in this pipe has effective openings.
  • a first opening is formed by an opening for a resonator tube, a small section of which leads into the interior of the gas Pipe protrudes and a large section is attached substantially above the opening is.
  • Part of the interior of the housing is filled with sound-absorbing material.
  • the second opening is formed by perforation of the gas-carrying pipe in the Area of sound absorbing material.
  • the present invention is therefore based on the object of a silencer Specify the type mentioned, the one with low material and space requirements broadband reduction of noise is possible.
  • the surprisingly good effectiveness of the muffler according to the invention is based that the entire interior of the case is the volume and that over the Pipe breakthrough pipe piece form the neck of a Helmholtz resonator, whose resonance frequency is tuned within wide limits by the length of the neck can be changed without having to change the housing volume. Thanks to the sound-absorbing material filled housing part is the resonance curve of the Helmholtz resonators significantly broadened and the sound absorbing effect of the Helmholtz resonators extend over a correspondingly wide one Frequency range.
  • the interior of the housing forms a connection with the perforation in the gas-carrying pipe a quarter-wave resonator that operates at higher frequencies has a sound-reducing effect.
  • the silencer shown in Fig. 1 consists of a Housing 1 of conventional design.
  • the inside of the housing 2 passes through a gas-carrying pipe 3.
  • An end region of the The interior of the housing 2 is made of sound-absorbing material 7 filled by a perforated wall 8 in position is held.
  • the gas-carrying pipe 3 has two acoustically active Provide openings.
  • One opening is a breakthrough 4, which is located in the empty part of the housing interior 2.
  • a pipe section 5 in the form of a Half pipe attached to the gas pipe 3 lying.
  • the Pipe section 5 acts as a neck, the housing interior 2 as a volume a Helmholtz resonator, the sound absorbing Material 7 causes a broadening of the resonance curve.
  • the second acoustically effective opening in the form of a perforation 6 is the second acoustically effective opening in the form of a perforation 6.
  • Das Housing interior 2 forms in connection with the perforation 6 a quarter-wave resonator whose resonance frequency is determined by the length of the housing 1.
  • the Resonance curve of the quarter-wave resonator is again dampened by the sound absorbing material 7 and in widened as desired. Thanks to the arrangement of the sound absorbing material 7 directly above the perforation 6, d. H. at the location of the greatest sound velocity is Maximum broadening of the resonance curve.
  • the exit of the silencer takes the direct route through the gas-carrying pipe 3
  • other part takes the detour from breakthrough 4 through the Interior of the housing 2 for perforation 6 Interference, the frequencies of which by the path difference are defined.
  • the sound absorbing effect Material 7 a broadening of the interference curve.
  • Fig. 2 shows the passage insulation dimension A as a function of Frequency f for a silencer according to FIG. 1, the Volume was about 9 l, with about 20% of the interior of the housing were filled with sound absorbing material. The sound-absorbing effect starts at just a few Hertz and extends from a few resonance drops to over 600 Hz. So the whole is for the low frequency Acoustics important area covered. In vehicle tests became aware of the extraordinary mode of operation of the system an improvement over simple Absorption silencers of up to 10 dB (A) proven.

Landscapes

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

Claims (1)

  1. Amortisseur de bruit muni d'un boítier (1), d'un conduit de gaz (3) traversant l'intérieur du boítier (2) et comportant des ouvertures (4, 6) efficaces d'un point de vue acoustique ménagées dans le conduit (3), dans lequel la première ouverture est un percement (4) sur lequel est fixé un tronçon de conduit (5), dans lequel une partie de l'intérieur du boítier (2) est remplie de matériau absorbant les bruits (7) et dans lequel dans la région du matériau absorbant les bruits (7) est ménagée une perforation (6) faisant office de deuxième ouverture, caractérisé en ce que le tronçon de conduit (5) est conçu comme un demi-conduit et est fixé à l'horizontale sur le conduit de gaz (3), en ce que le matériau absorbant les bruits (7) est maintenu au moyen d'une paroi perforée (8), en ce que l'intérieur du boítier (2) se compose d'un point de vue acoustique de deux parties reliées par la paroi perforée (8) et en ce que les deux ouvertures (4, 6) efficaces d'un point de vue acoustique sont associées respectivement à une seule partie.
EP97105824A 1996-04-18 1997-04-09 Silencieux Expired - Lifetime EP0802308B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29607010U DE29607010U1 (de) 1996-04-18 1996-04-18 Schalldämpfer
DE29607010U 1996-04-18

Publications (2)

Publication Number Publication Date
EP0802308A1 EP0802308A1 (fr) 1997-10-22
EP0802308B1 true EP0802308B1 (fr) 2001-03-21

Family

ID=8022736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105824A Expired - Lifetime EP0802308B1 (fr) 1996-04-18 1997-04-09 Silencieux

Country Status (2)

Country Link
EP (1) EP0802308B1 (fr)
DE (2) DE29607010U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500798A1 (fr) 2003-07-24 2005-01-26 J. Eberspächer GmbH Co. KG Silencieux et ligne d'échappement
WO2017144266A1 (fr) 2016-02-26 2017-08-31 Tenneco Gmbh Élément de silencieux d'échappement et silencieux d'échappement
DE102016103466A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpferelement
DE102016103453A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasanlage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2864199B1 (fr) * 2003-12-23 2006-02-24 Mark Iv Systemes Moteurs Sa Conduit a attenuateurs acoustiques integres et son procede fabrication
RU2268374C2 (ru) * 2003-12-31 2006-01-20 Рудольф Натанович Старобинский Глушитель шума выхлопа двигателя внутреннего сгорания
DE102007007600A1 (de) † 2007-02-13 2008-08-14 J. Eberspächer GmbH & Co. KG Schalldämpfer für eine Abgasanlage
RU185332U1 (ru) * 2018-02-28 2018-11-30 Сергей Васильевич Копытцов Глушитель шума отработавших газов двигателя внутреннего сгорания

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2323955A (en) * 1930-07-25 1943-07-13 Gen Motors Corp Resonance unit
DE976032C (de) * 1949-11-22 1963-01-24 Eberspaecher J Schalldaempfer mit Abzweigfilter und Reihenfilter
JPS56129751A (en) * 1980-03-14 1981-10-12 Nippon Denso Co Ltd Intake noise silencing apparatus for internal combustion engine
DE3417131A1 (de) * 1984-05-09 1985-11-21 LEISTRITZ Maschinenfabrik GmbH, 8500 Nürnberg Reflexions-abgasschalldaempfer
JPS62248814A (ja) * 1986-04-21 1987-10-29 Mitsubishi Electric Corp 消音器
DE3641942A1 (de) * 1986-12-09 1988-06-23 Leistritz Ag Absorptions-abgasschalldaempfer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500798A1 (fr) 2003-07-24 2005-01-26 J. Eberspächer GmbH Co. KG Silencieux et ligne d'échappement
WO2017144266A1 (fr) 2016-02-26 2017-08-31 Tenneco Gmbh Élément de silencieux d'échappement et silencieux d'échappement
DE102016103466A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasschalldämpferelement
DE102016103453A1 (de) 2016-02-26 2017-08-31 Tenneco Gmbh Abgasanlage
DE102016103453B4 (de) 2016-02-26 2023-06-15 Tenneco Gmbh Abgasschalldämpfer, Katalysator und Abgasanlage
DE102016103466B4 (de) 2016-02-26 2024-12-12 Tenneco Gmbh Abgasschalldämpferelement und Abgasschalldämpfer

Also Published As

Publication number Publication date
EP0802308A1 (fr) 1997-10-22
DE59703160D1 (de) 2001-04-26
DE29607010U1 (de) 1997-08-14

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