EP0802308A1 - Silencieux - Google Patents

Silencieux Download PDF

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Publication number
EP0802308A1
EP0802308A1 EP97105824A EP97105824A EP0802308A1 EP 0802308 A1 EP0802308 A1 EP 0802308A1 EP 97105824 A EP97105824 A EP 97105824A EP 97105824 A EP97105824 A EP 97105824A EP 0802308 A1 EP0802308 A1 EP 0802308A1
Authority
EP
European Patent Office
Prior art keywords
housing
sound
absorbing material
interior
opening
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.)
Granted
Application number
EP97105824A
Other languages
German (de)
English (en)
Other versions
EP0802308B1 (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 mufflers with a housing and a gas-carrying pipe crossing the interior of the housing according to the preamble of claim 1.
  • Silencers for exhaust systems of internal combustion engines are known. Their job is to reduce the noise leaving the engine with the exhaust gases to a level that is compatible with the environment. They use the basic physical principles of absorption, reflection and interference.
  • the present invention is therefore based on the object of specifying a muffler of the type mentioned at the outset, which enables a broadband reduction of the interference noise while requiring little material and space.
  • the surprisingly good effectiveness of the muffler according to the invention is based first of all on the fact that the entire interior of the housing forms the volume, the tube piece fastened above the tube opening forms the neck of a Helmnoltz resonator, the resonance frequency of which can be adjusted within wide limits by the length of the neck without this Housing volume would have to be changed. Thanks to the housing part filled with sound-absorbing material, the resonance curve of the Helmnoltz resonator is significantly broadened and the sound-absorbing effect of the Helmholtz resonator extends over a correspondingly wide frequency range.
  • the interior of the housing in conjunction with the perforation in the gas-carrying pipe forms a quarter-wave resonator, which has a sound-reducing effect at higher frequencies.
  • the resonance curve is also broadened.
  • the frequencies at which interference noise is reduced or canceled out are, if adequately dimensioned, set in such a way that the muffler has a broadband effect from the lowest to the high frequencies.
  • the tube piece forming the neck of the Helmholtz resonator is designed as a half tube and fastened lying on the gas tube. This configuration results in a maximally stable construction with minimal material expenditure.
  • the silencer shown in Fig. 1 consists of a housing 1 of conventional design.
  • the housing interior 2 passes through a gas-carrying pipe 3.
  • An end region of the housing interior 2 is filled with sound-absorbing material 7, which is held in position by a perforated wall 8.
  • the gas-carrying pipe 3 is provided with two acoustically active openings.
  • One opening is an opening 4, which is located in the empty part of the housing interior 2.
  • a pipe section 5 in the form of a half pipe is fastened lying on the gas-carrying pipe 3 via the opening 4.
  • the pipe section 5 acts as a neck, the housing interior 2 as a volume of a Helmholtz resonator, the sound-absorbing material 7 causing the resonance curve to broaden.
  • the second acoustically active opening in the form of a perforation 6 there is the second acoustically active opening in the form of a perforation 6.
  • the housing interior 2 in conjunction with the perforation 6 forms a quarter-wave resonator, the resonance frequency of which determines the length of the housing 1 is.
  • the resonance curve of the quarter-wave resonator is in turn dampened by the sound-absorbing material 7 and widened in the desired manner. Thanks to the arrangement of the sound absorbing material 7 directly above the perforation 6, ie at the location of the greatest sound velocity, the broadening of the resonance curve is maximal.
  • the disturbing sound reaches the silencer exit in two different ways.
  • Part of the noise takes the direct route through the gas-carrying pipe 3, another part takes the detour from the opening 4 through the housing interior 2 to the perforation 6. This leads to interference, the frequencies of which are defined by the path difference.
  • the sound-absorbing material 7 causes the interference curve to widen.
  • FIG. 2 shows the passage insulation dimension A as a function of the frequency f for a muffler according to FIG. 1, the volume of which was approximately 9 l, about 20% of the interior of the housing being 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. This covers the entire area important for low-frequency acoustics.
  • the extraordinary mode of operation of the system was proven with an improvement compared to simple absorption silencers of up to 10 dB (A).

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)
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 true EP0802308A1 (fr) 1997-10-22
EP0802308B1 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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2864199A1 (fr) * 2003-12-23 2005-06-24 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
RU185332U1 (ru) * 2018-02-28 2018-11-30 Сергей Васильевич Копытцов Глушитель шума отработавших газов двигателя внутреннего сгорания

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333645A1 (de) 2003-07-24 2005-02-24 J. Eberspächer GmbH & Co. KG Schalldämpfer sowie Abgasanlage
DE102007007600A1 (de) † 2007-02-13 2008-08-14 J. Eberspächer GmbH & Co. KG Schalldämpfer für eine Abgasanlage
DE102016103466B4 (de) 2016-02-26 2024-12-12 Tenneco Gmbh Abgasschalldämpferelement und Abgasschalldämpfer
WO2017144266A1 (fr) 2016-02-26 2017-08-31 Tenneco Gmbh Élément de silencieux d'échappement et silencieux d'échappement
DE102016103453B4 (de) 2016-02-26 2023-06-15 Tenneco Gmbh Abgasschalldämpfer, Katalysator und Abgasanlage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391180A (en) * 1930-07-25 1933-04-18 Gen Motors Res Corp Improvements relating to apparatus for attenuating sound waves by resonance
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
EP0163024A1 (fr) * 1984-05-09 1985-12-04 Leistritz Aktiengesellschaft Silencieux d'échappement à réflexion
JPS62248814A (ja) * 1986-04-21 1987-10-29 Mitsubishi Electric Corp 消音器
EP0274659A1 (fr) * 1986-12-09 1988-07-20 Leistritz Aktiengesellschaft Silencieux à absorption/réflexion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391180A (en) * 1930-07-25 1933-04-18 Gen Motors Res Corp Improvements relating to apparatus for attenuating sound waves by resonance
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
EP0163024A1 (fr) * 1984-05-09 1985-12-04 Leistritz Aktiengesellschaft Silencieux d'échappement à réflexion
JPS62248814A (ja) * 1986-04-21 1987-10-29 Mitsubishi Electric Corp 消音器
EP0274659A1 (fr) * 1986-12-09 1988-07-20 Leistritz Aktiengesellschaft Silencieux à absorption/réflexion

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 010 (M - 107) 21 January 1982 (1982-01-21) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 121 (M - 686) 15 April 1988 (1988-04-15) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2864199A1 (fr) * 2003-12-23 2005-06-24 Mark Iv Systemes Moteurs Sa Conduit a attenuateurs acoustiques integres et son procede fabrication
EP1548701A1 (fr) * 2003-12-23 2005-06-29 Mark IV Systemes Moteurs (Société Anonyme) Conduit avec des attenuateurs acoustiques intégrés et son procédé de fabrication
RU2268374C2 (ru) * 2003-12-31 2006-01-20 Рудольф Натанович Старобинский Глушитель шума выхлопа двигателя внутреннего сгорания
RU185332U1 (ru) * 2018-02-28 2018-11-30 Сергей Васильевич Копытцов Глушитель шума отработавших газов двигателя внутреннего сгорания

Also Published As

Publication number Publication date
DE59703160D1 (de) 2001-04-26
EP0802308B1 (fr) 2001-03-21
DE29607010U1 (de) 1997-08-14

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