EP1959106B2 - Silencieux pour un système d'échappement - Google Patents

Silencieux pour un système d'échappement Download PDF

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Publication number
EP1959106B2
EP1959106B2 EP08150938.2A EP08150938A EP1959106B2 EP 1959106 B2 EP1959106 B2 EP 1959106B2 EP 08150938 A EP08150938 A EP 08150938A EP 1959106 B2 EP1959106 B2 EP 1959106B2
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EP
European Patent Office
Prior art keywords
chamber
expansion chamber
resonator
housing
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.)
Active
Application number
EP08150938.2A
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German (de)
English (en)
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EP1959106A1 (fr
EP1959106B1 (fr
Inventor
Micha HÖRR
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 Exhaust Technology GmbH and Co KG
Original Assignee
Eberspaecher Exhaust Technology 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
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Application filed by Eberspaecher Exhaust Technology GmbH and Co KG filed Critical Eberspaecher Exhaust Technology GmbH and Co KG
Publication of EP1959106A1 publication Critical patent/EP1959106A1/fr
Publication of EP1959106B1 publication Critical patent/EP1959106B1/fr
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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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • F01N1/006—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages comprising at least one perforated tube extending from inlet to outlet of the silencer
    • 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
    • F01N1/023—Helmholtz resonators
    • 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
    • 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
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/04—Throttling-expansion and resonance
    • 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

Definitions

  • the present invention relates to a silencer for an exhaust system of an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1.
  • a Helmholtz resonator in a silencer, which has a resonator chamber which is coupled in a sound-transmitting manner via a neck to an exhaust line arrangement of the silencer.
  • a resonator chamber which is coupled in a sound-transmitting manner via a neck to an exhaust line arrangement of the silencer.
  • branch points are disadvantageous in many ways.
  • additional noise may occur at the branch point at higher volume flows.
  • branches are comparatively expensive to produce.
  • the resonator volume can not be connected via a single branch to the exhaust pipe arrangement. At the junction comparatively large flow velocities can occur; It can also lead to relatively high temperature fluctuations at the junction.
  • a muffler for an exhaust system of an internal combustion engine which has a housing and a guided through the housing exhaust line arrangement. Furthermore, an expansion chamber and a resonator chamber of a Helmholtz resonator are formed in the housing, whose respective neck is formed by at least one respective connecting tube arranged in the housing.
  • the exhaust pipe arrangement is passed through the expansion chamber without interruption and has a perforation within the expansion chamber. Furthermore, the respective connecting tube connects the expansion chamber with the resonator chamber.
  • the exhaust pipe arrangement comprises only a single inlet pipe and only a single outlet pipe.
  • the present invention is concerned with the problem of providing a muffler of the type mentioned an improved embodiment, which is particularly suitable for high-performance internal combustion engines, which are characterized by relatively high volume flows. Furthermore, a solution is sought, which has a relatively low backpressure increase. In addition, a cost-effective production is desired.
  • the invention is based on the general idea of sound transmitting the exhaust pipe arrangement via a perforation with an expansion chamber, while the resonator neck connects said expansion chamber with the resonator chamber of the Helmholtz resonator.
  • This construction results in the expansion chamber very low flow velocities, which significantly reduces pressure losses in the flow through the muffler.
  • the muffler is characterized in particular for relatively high volume flows at the same time low pressure losses. Furthermore, the muffler is characterized in a special way for high-performance internal combustion engines or for large-volume internal combustion engines. Within the expansion chamber also temperature fluctuations can be reduced, which in particular has a positive effect on the fatigue strength of the muffler.
  • the exhaust pipe arrangement comprises either an inlet pipe and at least two outlet pipes or an outlet pipe and at least two inlet pipes, wherein the inlet pipes and outlet pipes are coupled to each other via at least one perforation having coupling piece within the expansion chamber.
  • the exhaust pipe arrangement has a plurality of exhaust pipes, at least two of which each have a perforation within the expansion chamber, different damping characteristics can be achieved here by adapting the respective perforations accordingly.
  • the perforations may differ from each other in terms of number of holes and hole cross-section. This is particularly advantageous when the at least two exhaust pipes are traversed differently by exhaust gas as a function of load and / or speed of the internal combustion engine.
  • one of the exhaust pipes is activated only at larger exhaust gas flow rates. In this way, a different damping characteristic as a function of the exhaust gas volume flow can be realized comparatively easily.
  • a muffler 1 a housing 2, in which at least one expansion chamber 3 and a resonator 4 are formed. Furthermore, the muffler 1 has an exhaust pipe assembly 5 and contains in its housing 2, a connecting pipe 6. In the embodiments of the invention, the muffler 1 to an absorption chamber 7, which is also formed in the housing 2 and at least partially with a Schallschluckstoff or absorbent 8 is filled.
  • the muffler 1 is provided for installation in an exhaust system of an internal combustion engine, not shown here, which may be arranged in particular in a motor vehicle.
  • the resonator chamber 4 forms the resonance volume of a Helmholtz resonator 9 whose resonator neck is formed by the connecting tube 6.
  • the connecting pipe 6 is arranged in the housing 2 so as to connect the resonator chamber 4 to the expansion chamber 3 in a communicative manner.
  • the exhaust pipe assembly 5 is passed through the housing 2, thus having two ends 10 and 11, one of which - depending on the direction of flow of the exhaust pipe assembly 5 - forms an exhaust gas inlet, while the other then forms an exhaust gas outlet. Between the ends 10, 11 extends the exhaust pipe assembly 5 inside the housing 2. It is noteworthy that the exhaust pipe assembly 5 is at least passed through the expansion chamber 3 without interruption. In the examples shown, the exhaust pipe assembly 5 is passed through the entire housing 2 without interruption. This means, in particular, that the exhaust pipe arrangement 5 ensures a more or less effective flow guidance at each point between its ends 10, 11.
  • the exhaust pipe assembly 5 is passed through the expansion chamber 3 and has within the expansion chamber 3, a perforation 12, which is in particular formed by a plurality of holes 13 which break a flow-leading wall of the exhaust pipe assembly 5.
  • the perforation 12 thus creates a sound-transmitting connection between an interior 14 of the exhaust pipe assembly 5 and the expansion chamber 3. It is noteworthy that such a perforation 12 affects the flow through the exhaust pipe assembly 5 only comparatively slightly. In particular, owing to the perforation 12, only a comparatively small increase in pressure results. Furthermore, even at comparatively high mass flows, the perforation 12 does not result in any significant additional noise formation within the muffler 1.
  • the sound to be damped by the Helmholtz resonator 9 can enter the expansion chamber 3 and activate the Helmholtz resonator 9 coupled therewith via the connecting tube 6.
  • the connecting tube 6 can effectively dampen.
  • the absorption chamber 7 can bring about a certain damping effect, in particular for high-frequency noise.
  • the absorption chamber 7 can preferably be coupled to the expansion chamber 3 via a further perforation 15, which is not visible here, in a sound-transmitting manner.
  • This perforation 15 may e.g. be provided in an intermediate wall 16 which separates the expansion chamber 3 from the absorption chamber 7.
  • the absorption chamber 7 is sound-transmittingly coupled to the resonator chamber 4 or to the connecting pipe 6 or additionally to the exhaust pipe arrangement 5, through a corresponding perforation in an intermediate wall 17 separating the absorption chamber 7 from the resonator chamber 4 or in a section running inside the absorption chamber 7 of the connecting pipe 6 or additionally in a running within the absorption chamber 7 portion of the exhaust pipe assembly 5 is formed.
  • the exhaust pipe arrangement 5 is passed through the resonator chamber 4.
  • the exhaust pipe assembly 5 is passed through the absorption chamber 7 in these embodiments.
  • the expansion chamber 3 and the resonator 4 and here the absorption chamber 7 are arranged axially one behind the other with respect to a longitudinal direction of the exhaust pipe assembly 5, wherein the absorption chamber 7 - if present - axially between the expansion chamber. 3 and the resonator chamber 4 is arranged.
  • the exhaust pipe assembly 5 consists of a single exhaust pipe 18 here.
  • This exhaust pipe 18 is, in particular rectilinear, passed through the housing 2 and has the perforation 12 in a section passed through the expansion chamber 3.
  • This design is suitable for single-flow exhaust systems or for single-flow sections of exhaust systems.
  • Fig. 2 In the Fig. 2 embodiment shown is provided for a Hoflutige exhaust system or for a Moflectiv portion of an exhaust system and is characterized in that the exhaust pipe assembly 5 has a plurality of parallel through-flow exhaust pipes 18, 19. In the example shown, only two such exhaust pipes 18, 19 are shown. Likewise, three and more exhaust pipes 18, 19 are conceivable.
  • the two exhaust pipes 18, 19 are each passed through the housing 2. At least one of the two exhaust pipes 18, 19 is also passed through the expansion chamber 3 and has within the expansion chamber 3 a provided with the perforation 12 section. In the embodiment shown, both exhaust pipes 18, 19 are passed through the expansion chamber 3 and each provided in a guided through the expansion chamber 3 section with such a perforation 12 or 12 '.
  • the perforations 12, 12 'of the two exhaust pipes 18, 19 are designed differently.
  • the two perforations 12, 12 ' are configured differently with regard to the sound-coupling effect.
  • the number of holes 13 in the one exhaust pipe 18 is smaller than the number of holes 13 'of the other exhaust pipe 19.
  • the holes 13 of an exhaust pipe 18 are here provided with a larger hole cross section or hole diameter than the holes 13 'of the other exhaust pipe 19th
  • the exhaust pipe assembly 5 each have a coupling piece 20 which connects at least two individual lines 21, with a common bus 22.
  • the coupling piece 20 form a branch point, in which at least one of the two individual lines 21 branches off from the manifold 22.
  • the coupling piece 20 may form a junction, in which at least one of the individual lines 21 merges with the manifold 22.
  • the manifold 22 may form an inlet tube, while the two individual tubes 21 each form an outlet tube. In the reverse flow direction, the two individual lines 21 each form an inlet pipe, while the manifold 22 forms a common outlet pipe.
  • the individual lines 21 extend through the resonator chamber 4 and extend into the expansion chamber 3, that is to say optionally also through the absorption chamber 7.
  • the manifold 22 only projects into the expansion chamber 3.
  • the arrangement of the lines is chosen such that the collecting line 22 extends through the resonator chamber 4 and extends into the expansion chamber 3, wherein the collecting line 22 can also extend through the absorption chamber 7.
  • the two individual lines 21 only extend into the expansion chamber 3.
  • the coupling piece 20 is disposed respectively within the expansion chamber 3.
  • the coupling piece 20 is preferably equipped with the perforation 12.
  • the coupling piece 20 may be manufactured in shell construction and thus in particular be assembled from two half-shells. At least one of these shells can then be provided with the perforation 12.
  • the intermediate walls 16 and 17 are used to separate the individual chambers 3, 4, 7 from each other and at the same time form a stiffening of the housing 2. Further, the intermediate walls 16, 17 are used to hold the pipes of the muffler 1, so the connecting pipe 6 and the pipes or lines 18, 19, 21, 22 of the exhaust pipe arrangement 5.
  • the respective muffler 1 in each case only a single Helmholtz resonator 9.

Landscapes

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

Claims (4)

  1. Silencieux pour une installation d'échappement d'un moteur à combustion interne, en particulier sur un véhicule automobile, comprenant
    - un boîtier (2),
    - un agencement de conduite d'échappement (5) guidé à travers le boîtier (2),
    - une chambre d'expansion (3) formée dans le boîtier (2),
    - au moins une chambre de résonateur (4) formée dans le boîtier (2), un résonateur de Helmholtz (9), dont le col respectif est formé par au moins un tuyau de liaison (6) respectif, disposé dans le boîtier (2),
    - l'agencement de conduite d'échappement (5) étant guidé sans interruption à travers la chambre d'expansion (3) et présentant une perforation (12) à l'intérieur de la chambre d'expansion (3),
    - le tuyau de liaison (6) respectif reliant par communication la chambre d'expansion (3) avec la chambre de résonateur (4),
    caractérisé en ce que
    - l'agencement de conduite d'échappement (5) présente un tuyau d'entrée (22) et au moins deux tuyaux de sortie (21) ou un tuyau de sortie (22) et au moins deux tuyaux d'entrée (21), qui sont couplés l'un à l'autre par au moins une pièce de couplage (20) présentant la perforation (12) à l'intérieur de la chambre d'expansion (3),
    - une chambre d'absorption (7) remplie d'un matériau insonorisant (8) est disposée dans le boîtier (2), à travers laquelle le tuyau de liaison (6) est guidé,
    - le tuyau de liaison (6) à l'intérieur de la chambre d'expansion (3) présente une perforation ou une paroi intermédiaire (17) séparant la chambre d'absorption (7) de la chambre de résonateur (4) présente une perforation.
  2. Silencieux selon la revendication 1,
    caractérisé en ce que
    l'agencement de conduite d'échappement (5) est guidé à travers la chambre de résonateur (4).
  3. Silencieux selon la revendication 1 ou 2,
    caractérisé en ce que
    l'agencement de conduite d'échappement (5) est guidé à travers la chambre d'absorption (7).
  4. Silencieux selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    la chambre d'expansion (3) et la chambre de résonateur (4) ou la chambre d'expansion (3), la chambre d'absorption (7) et la chambre de résonateur (4) sont disposées axialement les unes derrière les autres par rapport à une direction longitudinale de l'agencement de conduite d'échappement (5).
EP08150938.2A 2007-02-13 2008-02-01 Silencieux pour un système d'échappement Active EP1959106B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007007600A DE102007007600A1 (de) 2007-02-13 2007-02-13 Schalldämpfer für eine Abgasanlage

Publications (3)

Publication Number Publication Date
EP1959106A1 EP1959106A1 (fr) 2008-08-20
EP1959106B1 EP1959106B1 (fr) 2010-12-08
EP1959106B2 true EP1959106B2 (fr) 2016-01-06

Family

ID=39315020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08150938.2A Active EP1959106B2 (fr) 2007-02-13 2008-02-01 Silencieux pour un système d'échappement

Country Status (3)

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EP (1) EP1959106B2 (fr)
AT (1) ATE491081T1 (fr)
DE (2) DE102007007600A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027290A1 (de) 2008-06-06 2009-12-10 J. Eberspächer GmbH & Co. KG Schalldämpfer für eine Abgasanlage
DE202008016200U1 (de) 2008-12-06 2009-03-12 Heinrich Gillet Gmbh Schalldämpfer für Abgasanlagen
DE102009049462A1 (de) * 2009-10-15 2011-05-05 J. Eberspächer GmbH & Co. KG Abgasanlage und Y-Verteiler
RU2504667C1 (ru) * 2012-07-05 2014-01-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Поволжский государственный технологический университет Глушитель
CN102966411A (zh) * 2012-11-18 2013-03-13 无锡明珠增压器制造有限公司 一种改进的消声器结构
DE102014114254A1 (de) * 2014-09-30 2016-03-31 Eberspächer Exhaust Technology GmbH & Co. KG Passiver Schalldämpfer mit Helmholtz-Resonator für mehrflutige Abgasanlagen
CN107882712B (zh) * 2017-09-06 2023-12-26 西安交通大学 一种可快速切换外插管式容管容型脉动衰减器
DE102018112963A1 (de) * 2018-05-30 2019-12-05 Faurecia Emissions Control Technologies, Germany Gmbh Schalldämpfer für eine Abgasanlage einer Brennkraftmaschine
DE102018004486A1 (de) 2018-06-03 2019-12-05 Gesellschaft für Akustikforschung Dresden mbH Einrichtung zur Dämpfung und/oder Absorption von Schall
DE102021106764A1 (de) * 2021-03-19 2022-09-22 Friedrich Boysen GmbH & Co KG. Schalldämpfer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807948A1 (de) † 1988-03-10 1989-09-28 Eberspaecher J Schalldaempfer fuer fahrzeugmotore
DE29607010U1 (de) † 1996-04-18 1997-08-14 Gillet Heinrich Gmbh Schalldämpfer
US20030005688A1 (en) † 2001-05-16 2003-01-09 Bassani Darryl C. Internal combustion engine exhaust system

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Publication number Priority date Publication date Assignee Title
US2070543A (en) * 1936-01-13 1937-02-09 Hayes Ind Inc Muffler
US2357791A (en) * 1941-03-24 1944-09-05 Walker Mfg Company Of Wisconsi Silencer
US3512607A (en) * 1969-07-18 1970-05-19 Tenneco Inc Co-axial tuning tubes for muffler
US3648803A (en) * 1969-10-13 1972-03-14 Walker Mfg Co Exhaust system
JPS58158312A (ja) * 1982-03-17 1983-09-20 Nissan Motor Co Ltd プリマフラ
JPS60175718A (ja) * 1984-02-22 1985-09-09 Nippon Soken Inc 内燃機関用消音器
GB2285283B (en) * 1993-12-24 1998-02-25 Apex Co Ltd Muffler for an internal combustion engine
US5783782A (en) * 1996-10-29 1998-07-21 Tenneco Automotive Inc. Multi-chamber muffler with selective sound absorbent material placement
DE20120470U1 (de) * 2001-12-18 2003-04-30 Boysen Friedrich Gmbh Co Kg Schalldämpfungseinrichtung
JP2003239717A (ja) * 2002-02-18 2003-08-27 Nissan Motor Co Ltd 消音装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807948A1 (de) † 1988-03-10 1989-09-28 Eberspaecher J Schalldaempfer fuer fahrzeugmotore
DE29607010U1 (de) † 1996-04-18 1997-08-14 Gillet Heinrich Gmbh Schalldämpfer
US20030005688A1 (en) † 2001-05-16 2003-01-09 Bassani Darryl C. Internal combustion engine exhaust system

Also Published As

Publication number Publication date
DE102007007600A1 (de) 2008-08-14
EP1959106A1 (fr) 2008-08-20
EP1959106B1 (fr) 2010-12-08
DE502008001973D1 (de) 2011-01-20
ATE491081T1 (de) 2010-12-15

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