EP1512865A2 - Silencieux - Google Patents

Silencieux Download PDF

Info

Publication number
EP1512865A2
EP1512865A2 EP04019431A EP04019431A EP1512865A2 EP 1512865 A2 EP1512865 A2 EP 1512865A2 EP 04019431 A EP04019431 A EP 04019431A EP 04019431 A EP04019431 A EP 04019431A EP 1512865 A2 EP1512865 A2 EP 1512865A2
Authority
EP
European Patent Office
Prior art keywords
wall
inner part
silencer according
openings
silencer
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Withdrawn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
EP04019431A
Other languages
German (de)
English (en)
Inventor
Uwe Keller
Hans-Joachim Dr. Löwe
Joachim Dr. Von Der Hagen
Dietmar Metz
Helmut Stönner
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.)
Veritas AG
BorgWarner Inc
Original Assignee
Veritas AG
BorgWarner Inc
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 Veritas AG, BorgWarner Inc filed Critical Veritas AG
Publication of EP1512865A2 publication Critical patent/EP1512865A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10137—Flexible ducts, e.g. bellows or hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1283—Manufacturing or assembly; Connectors; Fixations

Definitions

  • the invention relates to a muffler with an inner part and a Inner part surrounding outer part, the inner part having an apertured Inner wall and the outer part extending along the inner wall Outside wall forms.
  • a silencer of this type is known from DE 195 04 223 A1.
  • Silencers are used in the intake system of engines, such as motor vehicles. used to reduce noise emissions.
  • DE-OS 34 31 078 proposes this Purpose a silencer, which consists essentially of an intake pipe, which is made in sections of a sound-absorbing porous material, wherein the intake pipe in this section surrounded by a perforated metal tube is.
  • the muffler described above is not sufficient for the risen, to the Damping requirements.
  • the damping is problematic the noise of engines equipped with exhaust gas turbocharger systems are.
  • pulsation noises occur in such supercharger systems, by the smallest geometric irregularities of a compressor wheel of the turbocharger be generated.
  • These pulsation noises occur in proportion to the rotation frequency of the exhaust gas turbocharger.
  • the thereby excited frequency band is due to the large Operating speed range very broad fire. That is why a particularly broadband Sound attenuation required to generally reduce the noise level to reach.
  • the perforated tube to use as an intake pipe, that of a cylinder with a closed plane Surface is surrounded. Between the inside arranged perforated intake pipe and the cylinder concentrically surrounding the intake pipe is a wider continuous one Annular gap formed. The openings provided in the perforated intake pipe are in Arranged portion of this annular gap, so that the annular gap with the interior of the intake pipe can communicate.
  • the improved damping properties of this Silencer based on the allowed through the openings in the intake manifold Air mass exchange and pressure equalization with the annular gap, wherein the annular gap forming cylinder prevents pressure losses as well as a further reduction of the noise emission causes.
  • the degree of damping is also this muffler not sufficient to a broadband lowering of the noise just at to reach charged engines.
  • DE 196 38 304 A1 discloses a muffler, in particular for engines with Turbochargers is designed.
  • This silencer has a arranged in the flow channel Chamber on, with several parallel and spaced annular apertures is provided. Between two adjacent ring diaphragms is in each case a resonance space formed, which leads to a sound reduction in a certain frequency range leads.
  • a disadvantage of this muffler is that the panels have edges, over which the flow path of the gas leads. The flow resistance caused by these edges Affects the efficiency of the supercharger system. Besides that is the insertion of the panels in the muffler chamber manufacturing technically complex and accordingly costly.
  • damping systems are available and used in engines in which several different damper elements are arranged in series, for different Frequency bands are designed. But such damper systems require a overly large space.
  • the invention is therefore based on the object to provide a muffler, which is easy to manufacture and good, in particular broadband soundproofing properties having.
  • the advantage of the silencer according to the invention is that the active principle a Helmholtz resonator is combined with the operating principle of a ⁇ / 4 reflector, so that both low-frequency and higher-frequency components are attenuated can.
  • the silencer according to the invention allows the setting of a frequency band the attenuation according to the noise to be damped in the respective Use case occur.
  • the silencer according to the invention is very inexpensive to manufacture, since no special installations such as screens or scenes required are.
  • the silencer according to the invention requires only small space, since the inner part the silencer in an anyway necessary elastomer route in the charge air tract is integrated.
  • the silencer according to the invention connects due to the bellows outer wall has the advantage of a flexible design with good damping properties.
  • the bellows extends over the whole with the openings provided area of the inner wall. This ensures that the combination of two active principles (Helmholtz resonator and ⁇ / 4 reflector) resulting synergistic effects over the entire effective length or the entire effective range of the inner part come to fruition.
  • the inner part comprises a hose or a tube, each radial Have openings.
  • This embodiment provides a particularly simple and inexpensive Possibility to manufacture the silencer.
  • the inner part may also include tube segments or tube segments, respectively have radial openings.
  • the segmented inner part becomes a special good flexibility of the muffler achieved.
  • the inner part is thermally formed on the outer part. This facilitates the manufacture of the muffler, since in one operation, i. during one Heat treatment, multiple connection points or connecting surfaces between the inner part and the outer part can be produced.
  • the inner part can with also be mechanically connected to the outer part.
  • the inner part is integrated in a quick coupling. This is a particularly simple and fast connection of the muffler Connection components or connecting cables reached.
  • the outer part is flexible over the entire length of the inner part, so that the muffler completely as a flexible route in the charge air tract of a Motors use.
  • the outer wall is concentric with the Inner wall arranged. This ensures that the between the bellows and the inner wall formed cavities substantially the same shape and thus have the same volume.
  • the outer wall can also be conically shaped, whereby the void volume of the bellows in the longitudinal direction of the muffler is changed.
  • the materials of the inner part and the outer part are NBR, CR, ECO, AEM, ACM, silicone and FPM proved to be useful.
  • the inner part can also be made of plastic be prepared.
  • the outer part and / or the inner part can be a print carrier include, wherein the print carrier in the plastic version of the inner part is not required is.
  • the bellows extends in the longitudinal direction of the muffler beyond the inner part. That means a Part of the bellows directly in contact with the guided in the inner part of the gaseous medium comes.
  • the muffler shown in Figs. 1 to 3 is particularly, but not exclusively designed for use in an internal combustion engine and is as close as possible the pressure-side outlet opening of a compressor housing of an exhaust gas turbocharger arranged. Damping effect unfolds the silencer shown in Figs. 1 to 3 Of course, at other installation locations that the exhaust gas turbocharger not immediately are subordinate.
  • the muffler comprises an inner part 1, which in an outer part 2 is inserted, so that the outer part 2 surrounds the inner part 1.
  • the inner part 1 has an air inlet and an air outlet in the longitudinal direction A of the silencer as well as connection areas on which downstream or upstream components, such as charge air hoses be connected.
  • the inner part 1 is as a perforated flexible hose and the outer part 2 as bellows Hose designed so that the entire muffler flexible properties having.
  • the inner part 1 can also be made as a rigid tube.
  • the inner part 1 forms an inner wall 4, in the radial Openings 3 are provided.
  • the openings 3 are in parallel, in the circumferential direction the inner wall 4 extending rows 8 are arranged.
  • Each row 8 of openings 3 thus forms a circle whose radius corresponds to the radius of the inner wall 3, and which is arranged perpendicular to the longitudinal axis A of the muffler.
  • the Number of openings 3 per row can vary and is advantageously eight to twelve openings 3. A smaller number or a larger number of openings 3 per row 8 is also possible.
  • Figs. 1 to 3 which is the inner wall 4 surrounding Outer wall 5 is formed as a bellows 6.
  • the bellows 6 forms with the inner wall 4 individual cavities 7. These cavities 7 extend in the circumferential direction around the inner wall 4 each parallel to each other.
  • the bellows 6 is formed as a wave-shaped profiled hose, one fold 9, apart from the outer folds, of two wave troughs and a wave mountain is limited.
  • the in the respective wave crests of the folds 9 formed cavities 7 by in the circumferential direction circumferential troughs delimited laterally from each other.
  • the folds 9 are in the region of the troughs on the inner wall 4 on.
  • the individual cavities 7 are therefore closed against each other.
  • each row 8 of openings 3 is a cavity 7 assigned.
  • a staggered to the crest of a fold 9 row 8 is also conceivable, provided that it is ensured that the openings 3 of the row 8 in the associated Open cavity 7.
  • the bellows is 6 along the entire perforated portion of the inner wall 4 is provided and there forms the communicating through the openings 3 with the interior of the inner part 1 Cavities 7. This ensures that the excellent damping properties over the entire effective length of the inner part 1 come to fruition.
  • the openings 3 of adjacent rows 8 in Circumferentially offset from one another, such that the opening 3 of a row 8 each is arranged centrally between two openings 3 of the respective adjacent row 8.
  • the shown number of folds 9 and rows 8 of the openings 3 is to be understood as an example. A larger or lower number, in extreme cases only a single fold 9, is possible.
  • the overall shape of the outer part 2 is substantially cylindrical in the example shown, wherein the lateral surface, so the outer wall 5, not flat, but as a bellows 6 is formed. This means that the folds 9 of the bellows 6 respectively Same diameter and due to the matching geometry also the same Have volumes.
  • the outer wall 5 conical. At a Such a configuration increases the diameter of the outer wall 5 along the Longitudinal axis A of the muffler, so that the diameter of the individual Folds 9 and thus their volumes over the muffler length increases, causing the Damping frequency range can be influenced. Due to the conical design the outer wall 5 is also the mold release of the outer part 2 in the manufacture improved.
  • the geometry and the number of folds 9 depends on the requirements with regard to damping and flexibility in the respective application. It is conceivable, for example the void volume, in particular the cavity depth, ie the distance between the inner wall 4 and the apex of a fold 9, or the radius of curvature to change the individual folds 9.
  • the openings 3 in the inner wall 4 of the inner part 1 are in this example as radial Openings designed with a circular cross-section. Another cross-sectional shape, for example, oval openings that extend in the radial direction, is also possible. It is also possible to form the openings 3 slit-shaped, wherein a slot in the circumferential direction in a section of the inner wall 4th extends such that the slot opens into the associated cavity 7.
  • the inner part 1 of several consist of separate pipe segments or hose segments. there can each individual segment of the inner part 1 with the outer part 2 mechanically or be connected cohesively.
  • the inner part 1 can on the outer part 2 by simple or multiple vulcanizing. A mechanical fixation by clamps or rings is also possible. The fixation of the inner part 1 on the outer part 2 can take place at the two ends of the muffler or at each individual fold 9th
  • the inner part 1 can also be designed as an injection molded part, which in a quick coupling is integrated.
  • the inner part can also be made of plastic be prepared. If flexible hose materials are used, a Print carrier used. The use of the print carrier is especially in the outer part of the second appropriate. When inner part 1 can in the elastomer on the print carrier be waived. In the plastic version of the inner part 1 eliminates the print carrier.
  • the muffler described is particularly suitable for reducing noise emissions, that occur in supercharged diesel or gasoline engines.
  • the silencer can also be used in other areas, where airborne sound is to be effectively damped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust Silencers (AREA)
  • Pipe Accessories (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
EP04019431A 2003-09-08 2004-08-16 Silencieux Withdrawn EP1512865A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341319 2003-09-08
DE10341319A DE10341319B4 (de) 2003-09-08 2003-09-08 Schalldämpfer

Publications (1)

Publication Number Publication Date
EP1512865A2 true EP1512865A2 (fr) 2005-03-09

Family

ID=34129692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04019431A Withdrawn EP1512865A2 (fr) 2003-09-08 2004-08-16 Silencieux

Country Status (4)

Country Link
US (1) US7387188B2 (fr)
EP (1) EP1512865A2 (fr)
JP (1) JP2005084693A (fr)
DE (1) DE10341319B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023175302A1 (fr) * 2022-03-14 2023-09-21 Dyson Technology Limited Attenuateur de bruit

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DE102004028744B3 (de) 2004-06-14 2005-10-27 Veritas Ag Schalldämpfer
DE102004037088B3 (de) 2004-07-30 2006-04-13 Veritas Ag Flexibler Schlauch, vorzugsweise Ladeluftschlauch für Kraftfahrzeuge
BRPI0601716B1 (pt) * 2006-05-03 2018-09-25 Empresa Brasileira De Compressores S A Embraco arranjo de ressonadores em filtro acústico para compressor de refrigeração
US7794213B2 (en) * 2007-05-14 2010-09-14 Honeywell International Inc. Integrated acoustic damper with thin sheet insert
US8596398B2 (en) 2007-05-16 2013-12-03 Polaris Industries Inc. All terrain vehicle
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US8025122B2 (en) * 2008-11-06 2011-09-27 The Boeing Company Acoustically treated exhaust centerbody for jet engines and associated methods
US7934581B2 (en) * 2009-01-30 2011-05-03 Eaton Corporation Broadband noise resonator
US8651800B2 (en) * 2010-06-04 2014-02-18 Gm Global Technology Operations Llp Induction system with air flow rotation and noise absorber for turbocharger applications
US8307943B2 (en) 2010-07-29 2012-11-13 General Electric Company High pressure drop muffling system
US20120279245A1 (en) * 2011-05-02 2012-11-08 General Electric Company Compact discharge device for the refrigeration compressor of an appliance
DE102011075722B4 (de) * 2011-05-12 2020-09-24 Röchling Automotive AG & Co. KG Faltenbalgrohr mit Akustikfunktion
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US9096289B2 (en) 2012-02-09 2015-08-04 Polaris Industries Inc. Snowmobile
US10358187B2 (en) 2014-01-10 2019-07-23 Polaris Industries Inc. Snowmobile
US8430202B1 (en) 2011-12-28 2013-04-30 General Electric Company Compact high-pressure exhaust muffling devices
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US8511096B1 (en) 2012-04-17 2013-08-20 General Electric Company High bleed flow muffling system
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KR101452616B1 (ko) * 2013-02-28 2014-10-22 엘에스엠트론 주식회사 조립이 용이한 자동차용 퀵-커넥터
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US9650149B2 (en) * 2014-12-08 2017-05-16 Honeywell International Inc. Fire containment apparatuses for aircraft duct assemblies
US20170114761A1 (en) * 2015-10-23 2017-04-27 Dura Operating, Llc Resonator assembly and manufacturing process for producing the same
DE102016206915A1 (de) * 2016-04-22 2017-10-26 Deere & Company Baugruppe zum Anschluss einer Leitung
US10793181B2 (en) 2018-02-13 2020-10-06 Polaris Industries Inc. All-terrain vehicle
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023175302A1 (fr) * 2022-03-14 2023-09-21 Dyson Technology Limited Attenuateur de bruit

Also Published As

Publication number Publication date
JP2005084693A (ja) 2005-03-31
US7387188B2 (en) 2008-06-17
US20050067220A1 (en) 2005-03-31
DE10341319A1 (de) 2005-04-07
DE10341319B4 (de) 2006-02-02

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