EP1832725B1 - Aktiver Schalldämpfer für eine Abgasanlage - Google Patents

Aktiver Schalldämpfer für eine Abgasanlage Download PDF

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Publication number
EP1832725B1
EP1832725B1 EP07102847A EP07102847A EP1832725B1 EP 1832725 B1 EP1832725 B1 EP 1832725B1 EP 07102847 A EP07102847 A EP 07102847A EP 07102847 A EP07102847 A EP 07102847A EP 1832725 B1 EP1832725 B1 EP 1832725B1
Authority
EP
European Patent Office
Prior art keywords
chassis
chamber
silencer
sound
exhaust system
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 - Fee Related
Application number
EP07102847A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1832725A3 (de
EP1832725A2 (de
Inventor
Jan Dr. Krüger
Frank Castor
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1832725A2 publication Critical patent/EP1832725A2/de
Publication of EP1832725A3 publication Critical patent/EP1832725A3/de
Application granted granted Critical
Publication of EP1832725B1 publication Critical patent/EP1832725B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01N1/065—Silencing apparatus characterised by method of silencing by using interference effect by using an active noise source, e.g. speakers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/128—Vehicles
    • G10K2210/1282—Automobiles
    • G10K2210/12822—Exhaust pipes or mufflers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3212—Actuator details, e.g. composition or microstructure

Definitions

  • the present invention relates to an active silencer for an exhaust system of an internal combustion engine, in particular in a motor vehicle.
  • the present invention addresses the problem of providing for an active exhaust muffler an improved embodiment, which is characterized in particular by a simple structure.
  • the present invention is based on the general idea, in an active silencer for an exhaust system of an internal combustion engine, to integrate a chassis of an anti-noise generator in a partition wall between a first space and a second space.
  • a chassis of an anti-noise generator in a partition wall between a first space and a second space.
  • transported in the first space in the exhaust system transported airborne sound, and the anti-sound generator, which is arranged in the second space can act on the first room through a wall opening in the partition wall with anti-noise.
  • the fact that the chassis of the anti-noise generator and the partition are made of one piece considerably simplifies the installation of the active silencer, thereby helping to reduce assembly costs.
  • chassis of the partition in the manufacturing process of the partition is easily possible by the chassis or at least parts thereof are formed from the partition by punching and bending.
  • chassis can in one further processing step of the anti-sound generator are used, wherein the membrane is connected on the one hand with a peripheral edge of the wall opening and on the other hand with a sound generator of the anti-sound generator.
  • This so prefabricated partition can now be installed on the muffler without the assembly of the muffler first a complex installation, such as screwing, the chassis of the anti-noise generator must be done with the partition.
  • inventive solution connecting means such as screws, as well as, for example, damping elements, which should effect a damped mounting of the chassis to the partition.
  • the dividing wall with the membrane and / or with the chassis separates the first space in a gastight manner from the second space. This ensures that the second space and thus an arranged in this electronics of the anti-noise generator can not come into contact with the chemically aggressive exhaust gases and thereby the longevity of the silencer according to the invention can be increased.
  • the anti-sound generator is a speaker.
  • electrodynamic loudspeakers can be used, which on the one hand are inexpensive to produce and on the other hand ensure reliable sound attenuation by emitting signals superimposed on the interference waves.
  • the speakers are preferably often occurring at the respective exhaust system Sound frequencies adapted and designed to cushion this.
  • the dividing wall and the anti-sound generator are designed as a prefabricated assembly. This allows a separation of the assembly process of the silencer according to the invention in a prefabricate said assembly and a subsequent final assembly of the muffler. The prefabrication of the assembly can be taken over by a supplier, since the manufacturing process of the assembly and the manufacturing process of the muffler can be performed separately.
  • FIG. 1 shows a highly simplified, schematic longitudinal section through part of an active silencer according to the invention.
  • Fig. 1 comprises an active muffler 1 for a partially shown exhaust system 2 of an internal combustion engine in a housing 11 at least a first space 3 and a second space 4.
  • first room 3 can be transported in the exhaust system 2 airborne sound, which depending on frequency and volume may cause unpleasant noise pollution.
  • a partition wall 5 is provided, which has a wall opening 6, in accordance with Fig. 1 an anti-sound generator 7 is used.
  • the wall opening 6 is completely closed by the anti-sound generator 7.
  • first space 3 and the second space 4 according to the Fig. 1 is intended to represent only one possible embodiment, with other embodiments, for example, with additional rooms or sound obstacles, such as additional partitions, should also be included in the invention.
  • the anti-sound generator 7 has, as in Fig. 1 illustrated, a chassis 8 and a diaphragm 9, wherein the chassis 8 is preferably designed for receiving electrical or electronic components of the anti-sound generator 7, such as an actuator or sounder serving to drive the membrane 9.
  • the membrane 9 of the anti-sound generator 7 is preferably formed of a temperature-insensitive material, such as a metal, and therefore particularly suitable for use in exhaust systems 2, due to the high temperatures prevailing there.
  • the anti-sound generator 7 is arranged in the second space 4 and inserted into the wall opening 6 of the partition 5 so that it can act on the first room 3 with anti-noise in operation.
  • the chassis 8 of the anti-noise generator 7 and the partition wall 5 are made of one part.
  • Such a one-piece construction according to the invention of the chassis 8 and the partition wall 5 offers the great advantage that the manufacture of the chassis 8 and the partition wall 5 can be carried out essentially in one step, thereby avoiding later assembly of the chassis 8 on the partition wall 5.
  • the membrane 9 is gas-tight and is inserted into the wall opening 6 in such a way that it rests gas-tight against a peripheral edge of the wall opening 6.
  • the chassis 8 itself to the second space 4 can be made largely gas-tight.
  • the component formed from the partition wall 5 and the chassis 8 thus separates the first space 3 from the second space 4 in a gastight manner.
  • an inner space 12 is enclosed in a gastight manner by the chassis 8 and the membrane 9.
  • Such a gas-tight separation is required to chemically aggressive exhaust gases, which may be present for example in the first room 3, from a sensitive electronics of the anti-noise generator 7 keep away.
  • the gas-tight separation of the second space 4 from the first space 3 further causes the second space 4 has a closed gas volume and thereby an acoustic separation of the first space 3 from the second space 4 takes place, for the generation of a sound pressure by the vibration of the membrane. 9 is required.
  • the anti-sound generator 7 is designed as a loudspeaker and generates sound vibrations whose oscillation phase is shifted by 180 ° in comparison to the oscillation phase of the original wave generated in the exhaust system 2. If the phase-shifted sound wave now coincides with the original wave, at best both waves cancel out, which is also called destructive interference. By extinguishing the original wave, the acoustic emission of the exhaust system 2 is reduced, which is particularly advantageous due to the ever stricter sound emission requirements for exhaust systems 2 of great advantage.
  • An anti-noise generator 7 designed as a loudspeaker can be produced inexpensively and is adapted with respect to its sound emission capability to the sound frequencies and amplitudes occurring in the exhaust system 2, so that the greatest possible destructive interference can be ensured.
  • the chassis 8 of the anti-noise generator 7 form as an integral part of the partition 5, it is also possible to form the partition 5 and the anti-noise generator 7 as a prefabricated assembly, which can be manufactured separately from the manufacturing process of the active muffler 1.
  • a final assembly of the active muffler 1 can thus be simpler and faster and thereby realized more cost-effective, since the partition 5 with integrated anti-noise generator 7 as completely prefabricated assembly only needs to be connected to the rest of the active muffler 1 or with other parts of the exhaust system 2 and an otherwise required during the manufacture of the active muffler 1 connecting the chassis 8 with the partition 5, which is complex and therefore expensive, can be omitted.
  • the partition wall 5 closes a shell 10 of the active muffler 1 and / or forms a shell part of the muffler 1.
  • a connection of the partition wall 5 with other components of the muffler 1, for example with the housing 1 and with the shell 10, can be done in a conventional manner, for example via a weld or a flanging or a Veralzung.
  • the solution according to the invention thus makes it possible to produce the chassis 8 and the partition wall 5 preferably in one step, for example by means of a punching tool, so that only the electrics or electronics of the anti-sound generator 7 and the membrane 9 closing the wall opening 6 in the partition wall 5 of the anti-noise generator 7 must be retrofitted.
  • a general assembly of the anti-noise generator 7 and its chassis 8 on the partition wall 5 with the associated assembly costs and the associated assembly materials, such as screws and gaskets, can thus be omitted, making the assembly much simpler and the cycle times can be increased.
  • the production of the partition 5 together with the integrated chassis 8 or anti-noise generator 7 can be carried out separately from the production of the active muffler 1 and thereby decoupled from the actual manufacturing process of the active muffler 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
EP07102847A 2006-03-06 2007-02-22 Aktiver Schalldämpfer für eine Abgasanlage Expired - Fee Related EP1832725B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006010558A DE102006010558A1 (de) 2006-03-06 2006-03-06 Aktiver Schalldämpfer für eine Abgasanlage

Publications (3)

Publication Number Publication Date
EP1832725A2 EP1832725A2 (de) 2007-09-12
EP1832725A3 EP1832725A3 (de) 2009-03-25
EP1832725B1 true EP1832725B1 (de) 2011-12-14

Family

ID=38068623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07102847A Expired - Fee Related EP1832725B1 (de) 2006-03-06 2007-02-22 Aktiver Schalldämpfer für eine Abgasanlage

Country Status (5)

Country Link
US (1) US20070205043A1 (ja)
EP (1) EP1832725B1 (ja)
JP (1) JP2007239746A (ja)
CN (1) CN101033702B (ja)
DE (1) DE102006010558A1 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018085A1 (de) * 2008-04-09 2009-10-15 J. Eberspächer GmbH & Co. KG Aktiver Schalldämpfer
DE102010007013A1 (de) * 2010-02-05 2011-08-11 J. Eberspächer GmbH & Co. KG, 73730 Abgasanlage
DE102011084567C5 (de) * 2011-10-14 2019-08-14 Eberspächer Exhaust Technology GmbH & Co. KG Aktiver Schalldämpfer
DE102012201725B4 (de) * 2012-02-06 2016-02-25 Eberspächer Exhaust Technology GmbH & Co. KG Aktiver Schalldämpfer
DE102014101826B4 (de) * 2014-02-13 2016-08-04 Tenneco Gmbh Schallgebersystem für ein Kraftfahrzeug
EP2915967B1 (en) * 2014-03-04 2017-08-02 Eberspächer Exhaust Technology GmbH & Co. KG Active design of exhaust sounds
DE102015217461A1 (de) * 2015-09-11 2017-03-16 Eberspächer Exhaust Technology GmbH & Co. KG Verbindungsrohr zum Anschließen eines aktiven Schalldämpfers an eine Abgasanlage für eine Brennkraftmaschine
DE102016107069A1 (de) 2016-04-15 2017-10-19 Faurecia Emissions Control Technologies, Germany Gmbh Schallerzeugungsvorrichtung an einem Fahrzeug zur Reduzierung oder Erzeugung von Motorsound sowie Abgasanlage
DE102017129245A1 (de) 2017-12-08 2019-06-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Lufteinlassvorrichtung für eine Kühlvorrichtung eines Elektrofahrzeugs

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DE2607390C2 (de) * 1976-02-24 1982-09-23 Braun Ag, 6000 Frankfurt Dynamischer Lautsprecher mit hoher Nennbelastbarkeit
ZA825676B (en) * 1981-08-11 1983-06-29 Sound Attenuators Ltd Method and apparatus for low frequency active attennuation
US5097923A (en) * 1988-02-19 1992-03-24 Noise Cancellation Technologies, Inc. Active sound attenation system for engine exhaust systems and the like
US5457749A (en) * 1990-04-09 1995-10-10 Noise Cancellation Technologies, Inc. Electronic muffler
US5233137A (en) * 1990-04-25 1993-08-03 Ford Motor Company Protective anc loudspeaker membrane
US5229556A (en) * 1990-04-25 1993-07-20 Ford Motor Company Internal ported band pass enclosure for sound cancellation
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US5550334A (en) * 1991-10-30 1996-08-27 Noise Cancellation Technologies, Inc. Actively sound reduced muffler having a venturi effect configuration
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DE4317403A1 (de) * 1993-05-26 1994-12-01 Nokia Deutschland Gmbh Anordnung zur aktiven Schalldämpfung
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US5446249A (en) * 1993-07-13 1995-08-29 Digisonix, Inc. Dry acoustic system preventing condensation
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WO1997043754A1 (de) * 1996-05-14 1997-11-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Reaktiver schalldämpfer
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Also Published As

Publication number Publication date
CN101033702A (zh) 2007-09-12
US20070205043A1 (en) 2007-09-06
EP1832725A3 (de) 2009-03-25
JP2007239746A (ja) 2007-09-20
EP1832725A2 (de) 2007-09-12
CN101033702B (zh) 2013-02-27
DE102006010558A1 (de) 2007-09-13

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