EP1433948A2 - Dispositif d'atténuation des bruits sur un circuit d'admission d'air - Google Patents
Dispositif d'atténuation des bruits sur un circuit d'admission d'air Download PDFInfo
- Publication number
- EP1433948A2 EP1433948A2 EP03293260A EP03293260A EP1433948A2 EP 1433948 A2 EP1433948 A2 EP 1433948A2 EP 03293260 A EP03293260 A EP 03293260A EP 03293260 A EP03293260 A EP 03293260A EP 1433948 A2 EP1433948 A2 EP 1433948A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- duct
- chambers
- conduit
- openings
- noise attenuation
- 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
Links
- 230000030279 gene silencing Effects 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
-
- 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 present invention relates to a device for attenuation of noise on a air intake circuit for supercharged internal combustion engine, as well as an air intake circuit equipped with such an attenuation device.
- the main function of an air intake system of a combustion engine internal, equipped with a turbocharger is to convey to the engine the fresh air coming from the vehicle facade cleaning this air.
- these type noises aerodynamics are in a wide band of 500 Hertz at 3000 Hertz. This noise is a component of mouth noise called sighing noise. He is spread upstream of the turbocharger.
- To eliminate mouth noises high frequency it is used absorbent and porous materials that are installed in the filter housing and on the duct. However, the performance acoustic of these porous absorbent materials is greatly affected during the time by dust and infiltration of liquids.
- attenuation absorption requires a relatively large contact area with air in circulation. This congestion constraint can result in a increase in pressure losses.
- noise attenuation devices intended to be positioned on ducts conveying air under pressure, that is to say in downstream of the turbocharger. Noise attenuated by such devices present essentially a high frequency component.
- such devices consist of outer circumferential chambers communicating with the conduit through openings as illustrated in particular the patent EP1176355 or the patent DE-A-19943246. In this second document, all the rooms are of the same size and therefore not allow attenuation of noises emitted inside a wide frequency band.
- An object of the present invention is therefore to propose an attenuation device noises of the aforementioned type whose design makes it possible to dampen noises of mouth extending within a significant frequency range of 500 Hertz at 3,000 Hertz.
- the subject of the invention is a device for attenuating noise on a air intake circuit for a supercharged internal combustion engine, these noises being notably resulting from the operation of the turbocharger, this device in the form of a duct section integrable with the circuit, this duct being equipped with a first group of chambers external circumferences, arranged in parallel around the duct and communicating with the latter through openings arranged in parallel around the duct section to establish a stream communication between ducts and chambers allowing high noise attenuation frequency, characterized in that the conduit, adapted to constitute a section of the turbocharger air intake duct, comprises at least one additional room arranged in series with the first group of rooms, this first group of rooms, intended for noise attenuation high frequency, consisting of chambers extending along the conduit along a substantially axial component relative to the longitudinal axis of the duct, while the additional room or bedrooms, which communicate by at least one opening with the conduit and which are dimensioned by each chamber of the first group so as to
- the chambers of the first group which extend along the duct following a component substantially axial with respect to the longitudinal axis of the duct, communicating with the conduit through oblong openings and axial to said conduit .
- the or the average noise attenuation chambers frequency which extend essentially transversely to the duct, as for them, in the form of annular or semi chambers ring.
- These rooms for attenuation of the medium frequency noise communicate with the conduit via openings, preferably oblong, and transverse to said duct.
- rooms intended for the attenuation of high frequency noises are low volume rooms whose axial arrangement and in parallel makes it possible to limit the bulk on the leads.
- Another subject of the invention is an air intake circuit for a combustion engine. supercharged internal combustion, said circuit comprising at least one input of air, an air filter and a turbocharger interconnected by a conduit, characterized in that the inlet duct section of the turbocharger, extending upstream of the air filter or respectively downstream of the air filter, is equipped with a noise attenuation device of the aforementioned type.
- the noise attenuation device is more particularly intended to be positioned on an air intake circuit for supercharged internal combustion engine.
- An example of such a circuit air intake is shown in Figure 1.
- such circuits comprise at least one air inlet, an air filter 12 and a turbocharger 11 interconnected by a conduit.
- the turbocharger 11 is itself connected output to a motor 10 via a circuit equipped on its way an exchanger 13.
- the device which is the subject of the invention, is intended, in particular, to attenuate noise. from the operation of the turbocharger 11. It turns out that these noises generated by the turbocharger are not propagated in the flow direction air. These noises indeed have a tendency to go up towards the mouth of admission. Consequently, the noise attenuation device of the invention is present in the form of a duct capable of constituting a section of the duct of the turbocharger air intake circuit 11. Such a device is therefore positioned upstream of the turbocharger 11, upstream or downstream of the filter 12. In the example shown in FIG. 1, this device for attenuating noise is positioned upstream of the air filter 12.
- this noise attenuation device is in the form of a section 1 of duct integrable with the input circuit of the turbocharger 11.
- This section 1 conduit has openings 2, 3 communicating with chambers 5, 6 arranged around the duct section to establish a communication of the air flow between duct 1 and chambers 5, 6.
- this conduit 1 capable of constituting a section of the conduit of the circuit turbocharger 11, has at least two openings 2, 3 arranged in series along the conduit and communicating each with a room 5, 6 of differentiated orientation. At least one of the openings in the series consists of a plurality of so-called axial openings positioned in circumferentially parallel to said circuit.
- Each opening 2 in parallel communicates with a so-called axial chamber 5 so as to attenuate noise emitted at high frequency.
- Chambers 5 are called axial because their longitudinal component extends substantially parallel to the axis longitudinal of the duct 1. These chambers 5 can be arranged in parallel around the duct 1 because of their small volume. These 5 axial chambers are arranged in series with at least one chamber 6 transverse to said duct 1.
- the duct 1 comprises two chambers 6 transversely arranged axially offset along the duct 1 and in series with the group of rooms 5.
- transverse openings 3 open into a chamber 6 preferably annular or semi-annular extending at least partially around said led 1 so as to attenuate noise emitted at medium frequency.
- This positioning of openings and chambers both in series and in parallel to said circuit makes it possible to obtain a dimensional relationship between the rooms that can vary inside a wide beach.
- the openings 2 axial extending in parallel on the circumference of the conduit are intended to cooperate with low volume chambers arranged side by side and circumferentially around the duct.
- This set rooms 5 / apertures 2 allows the attenuation of noise emitted at high frequency, that is to say inside a beach extending beyond 1500 Hertz.
- the rooms 5 can have a very low volume and congestion on the duct is reduced.
- These sets opening / chambers co-operate with sets made up of openings 3 transverse to the duct, these transverse openings 3 cooperating with chambers 6, said transverse to the duct and preferably annular or semi-annular. Because of their disposition, these rooms can present a large volume. Indeed, this big volume is necessary to attenuate noise emitted at medium frequency, that is to say at within a frequency range between 500 Hertz and 1500 Hertz.
- the combining openings and axial chambers with openings and chambers transverse to the longitudinal axis of the duct allows, for a small overall dimensions, to obtain a dimensional relationship between extremely high rooms.
- the cooperating transverse chambers 6 with the 3 transverse openings can reach large volumes greater than the volume of each axial chamber arranged in parallel and cooperating with an axial opening.
- the volume of each room 6 is five to twelve times that of a room 5.
- the section of opening 2 or 3 is greater than one-tenth of the section of the leads 1.
- the volume of the chamber 6 for a diameter of the duct between 40 and 60 mm extends between 0.03 and 0.1 l. The combination of these rooms allows to cover a wide range of frequencies.
- the shapes and dimensions of the openings as well as the shapes and dimensions of the chambers are adapted to obtain different attenuation effects.
- the axial openings 2 cooperate with the axial chambers 5 to obtain noise attenuation on the basis of the quarter-wave principle or to constitute expansion chambers.
- the section of the opening 2 substantially corresponds to the section of the chamber 5.
- the conduit 1 comprises in addition openings 4 opening into the open air so as to mitigate low frequency noise, that is to say, those produced at a frequency below 500 Hertz.
- These openings 4 of the duct 1 opening into the open air are positioned on either side of a series of openings 2, 3 opening into chambers 5, 6.
- These openings here consist of simple slots axial, that is to say of longitudinal axis parallel to the longitudinal axis of the duct 1.
- These openings 4 have a width of the order of 1% of the perimeter of the leads for example 11.5 to 2.5 mm and a length of the order of the diameter duct is 40 to 60 mm.
- the openings 2, 3, 4 of the duct came of manufacture with the conduit, the chambers 5, 6 being constituted from parts 8A, 8B reported around said conduit.
- Rooms 5, 6 of the device are thus formed from two half-shells 8A, 8B reported around of said conduit 1.
- These half-shells 8A, 8B have an internal profile 9 curve adapted to fit in the manner of a saddle profile duct 1.
- the lateral or transverse faces of said shells have this profile curve while the longitudinal faces are touched once positioned on either side of the duct by enclosing the latter.
- these half-shells 8A, 8B are maintained on said conduit by connection, in particular by snapping of the half-shells between them.
- Rooms 5, 6 are obtained by partitioning half-shells via walls extending substantially parallel to or orthogonal to the longitudinal axis of the duct 1.
- 5 chambers arranged in parallel are obtained from partitions extending between the transverse walls of the half-shells, perpendicular to the latter, while the rooms 6 intended for cooperate with the transverse openings 3 of said duct are obtained at from partitions extending parallel to the transverse walls of the half-shells.
- These half-shells can still be connected to each other by welding and / or gluing.
- half-shells can also be maintained assembled to the conduit by connection such as welding or gluing between half-shells and leads.
- connection such as welding or gluing between half-shells and leads.
- the connection between half-shells and conduit is a non-sealed link.
- sealing is not essential.
- Such an attenuation device is in fact arranged to be positioned on the turbocharger inlet circuit, upstream of the air filter 12 equipping the turbocharger inlet circuit 11, or downstream of the air filter 12 between filter 12 and turbocharger inlet 11.
- the attenuated noise by means of a Such a device may extend within a frequency range extremely important between 500 Hertz and 3000 Hertz.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Supercharger (AREA)
- Air-Conditioning For Vehicles (AREA)
- Exhaust Gas After Treatment (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Steroid Compounds (AREA)
Abstract
Description
Claims (14)
- Dispositif d'atténuation des bruits sur un circuit d'admission d'air pour moteur (10) à combustion interne suralimenté, ces bruits étant notamment issus du fonctionnement du turbocompresseur (11), ce dispositif se présentant sous forme d'une section (1) de conduit intégrable au circuit, ce conduit (1) étant équipé d'un premier groupe de chambres (5) circonférentielles externes, disposées en parallèle autour du conduit (1) et communiquant avec ce dernier par l'intermédiaire d'ouvertures (2) disposées en parallèle autour de la section de conduit (1) pour établir une communication du flux d'air entre conduit (1) et chambres (5) autorisant une atténuation des bruits haute fréquence,
caractérisé en ce que le conduit (1), apte à constituer une section du conduit du circuit d'entrée d'air du turbocompresseur (11), comporte au moins une chambre (6) supplémentaire disposée en série avec le premier groupe de chambres (5), ce premier groupe de chambres (5), destiné à l'atténuation des bruits haute fréquence, étant constitué de chambres s'étendant le long du conduit suivant une composante essentiellement axiale par rapport à l'axe longitudinal du conduit, tandis que la ou les chambres (6) supplémentaires, qui communiquent par au moins une ouverture (3) avec le conduit (1) et qui sont dimensionnées par rapport à chaque chambre du premier groupe de manière à permettre une atténuation des bruits moyenne fréquence du circuit, s'étendent essentiellement transversalement au conduit de manière à limiter l'encombrement de l'ensemble. - Dispositif d'atténuation des bruits selon la revendication 1,
caractérisé en ce que la ou les chambres (6) d'atténuation des bruits moyenne fréquence se présentent sous forme de chambres, annulaires ou semi annulaires, s'étendant essentiellement transversalement au conduit (1), lesdites chambres (6) communiquant avec le conduit (1) par l'intermédiaire d'ouvertures (3) de préférence oblongues et transversales audit conduit (1). - Dispositif d'atténuation des bruits selon la revendication 2,
caractérisé en ce qu'au moins l'une (3) des ouvertures dites transversales de la série d'ouvertures (2, 3) communiquant avec une chambre (6) d'atténuation des bruits moyenne fréquence est équipée d'un col (7) débouchant dans ladite chambre (6) pour constituer avec ladite chambre (6) un résonateur de type Helmholtz. - Dispositif d'atténuation des bruits selon l'une des revendications 1 à 3,
caractérisé en ce que les chambres (5) du premier groupe, qui s'étendent le long du conduit (1) suivant une composante essentiellement axiale par rapport à l'axe longitudinal du conduit, communiquent avec le conduit (1) par l'intermédiaire d'ouvertures (2) oblongues et axiales audit conduit. - Dispositif d'atténuation des bruits selon l'une des revendications 1 à 4,
caractérisé en ce que le conduit (1) comporte en outre des ouvertures (4) débouchant à l'air libre de manière à atténuer les bruits basse fréquence. - Dispositif d'atténuation des bruits selon la revendication 5,
caractérisé en ce que les ouvertures (4) du conduit (1) débouchant à l'air libre sont positionnées de part et d'autre d'une série d'ouvertures (2, 3) débouchant dans des chambres (5, 6). - Dispositif d'atténuation des bruits selon l'une des revendications 1 à 6,
caractérisé en ce que les ouvertures (2, 3, 4) du conduit sont venues de fabrication avec la section (1) de conduit, les chambres (5, 6) étant constituées à partir de pièces (8A, 8B) rapportées autour dudit conduit (1). - Dispositif d'atténuation des bruits selon l'une des revendications 1 à 7,
caractérisé en ce que les chambres (5, 6) du dispositif sont ménagées à partir de deux demi-coquilles (8A, 8B) rapportées autour dudit conduit (1), les demi-coquilles (8A, 8B) présentant un profil (9) intérieur courbe apte à s'adapter à la manière d'une selle au profil du conduit (1). - Dispositif d'atténuation des bruits selon la revendication 8,
caractérisé en ce que les chambres (5, 6) sont obtenues par cloisonnement des demi-coquilles par l'intermédiaire de parois s'étendant sensiblement parallèlement ou orthogonalement à l'axe longitudinal du conduit (1). - Dispositif d'atténuation des bruits selon l'une des revendications 8 et 9,
caractérisé en ce que les demi-coquilles (8A, 8B) sont maintenues sur ledit conduit par liaison, en particulier par encliquetage des demi-coquilles entre elles. - Dispositif d'atténuation des bruits selon l'une des revendications 8 et 9,
caractérisé en ce que les demi-coquilles (8A, 8B) sont reliées entre elles par soudage et/ou collage. - Dispositif d'atténuation des bruits selon l'une des revendications 8 et 9,
caractérisé en ce que les demi-coquilles sont maintenues assemblées au conduit par liaison telle que soudure, collage entre demi-coquilles et conduit. - Dispositif d'atténuation des bruits selon l'une des revendications 1 à 12,
caractérisé en ce qu'il est agencé pour être positionné soit en amont du filtre à air (12) équipant le circuit d'entrée du turbocompresseur (11), soit en aval du circuit du filtre à air (12) équipant le circuit d'entrée du turbocompresseur (11). - Circuit d'admission d'air pour moteur (10) à combustion interne suralimenté, ledit circuit comportant au moins une entrée d'air, un filtre à air(12) et un turbocompresseur (11) reliés entre eux par un conduit,
caractérisé en ce que la section (1) de conduit d'entrée du turbocompresseur (11), s'étendant en amont du filtre à air (12) ou respectivement en aval du filtre à air (12), est équipée d'un dispositif d'atténuation des bruits conforme à l'une des revendications 1 à 13.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0216486 | 2002-12-23 | ||
FR0216486A FR2849114B1 (fr) | 2002-12-23 | 2002-12-23 | Dispositif d'attenuation des bruits sur un circuit d'admission d'air |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1433948A2 true EP1433948A2 (fr) | 2004-06-30 |
EP1433948A3 EP1433948A3 (fr) | 2005-05-04 |
EP1433948B1 EP1433948B1 (fr) | 2008-06-11 |
Family
ID=32406371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03293260A Expired - Lifetime EP1433948B1 (fr) | 2002-12-23 | 2003-12-19 | Dispositif d'atténuation des bruits sur un circuit d'admission d'air |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1433948B1 (fr) |
AT (1) | ATE398235T1 (fr) |
DE (1) | DE60321533D1 (fr) |
FR (1) | FR2849114B1 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2101057A1 (fr) * | 2008-03-12 | 2009-09-16 | Hutchinson | Dispositif d'atténuation acoustique pour ligne d'admission d'un moteur thermique, et ligne d'admission l'incorporant |
DE102008020721A1 (de) * | 2008-04-23 | 2009-10-29 | J. Eberspächer GmbH & Co. KG | Schalldämpferbaugruppe für eine Abgasleitung |
WO2012055784A3 (fr) * | 2010-10-25 | 2012-07-19 | Umfotec Umformtechnik Gmbh | Silencieux pour conduits d'air de suralimentation d'un moteur à combustion interne doté d'un turbocompresseur |
US20130092472A1 (en) * | 2011-10-12 | 2013-04-18 | Ford Global Technologies, Llc | Acoustic attenuator for an engine booster |
EP3112658A1 (fr) * | 2015-07-03 | 2017-01-04 | MANN+HUMMEL GmbH | Agencement de silencieux |
DE102007058938B4 (de) * | 2007-07-30 | 2021-03-25 | Hyundai Motor Co. | Luftreinigungs-Einlasskanal |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2876748B1 (fr) * | 2004-10-15 | 2010-10-08 | Trelleborg Fluid Systems Geie | Conduit pour le transport de fluide gazeux et dispositif d'admission d'air comportant un tel conduit |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1217190A (fr) * | 1958-12-03 | 1960-05-02 | Dispositif silencieux d'aspiration pour compresseurs et moteurs analogues | |
US5979598A (en) * | 1996-04-22 | 1999-11-09 | Woco Franz-Josef Wolf & Co. | Intake silencer for motor vehicle |
DE19855708A1 (de) * | 1998-12-03 | 2000-06-08 | Dietrich Denker | Rohrkammerdämpfer |
DE19943246A1 (de) * | 1999-09-10 | 2001-03-22 | Daimler Chrysler Ag | Schalldämpfer zur Herabminderung der Luftgeräusche im Ansaugstrang von Brennkraftmaschinen |
GB2365066A (en) * | 2000-07-28 | 2002-02-13 | Draftex Ind Ltd | Noise attenuation arrangements for pressurised-gas conduits |
-
2002
- 2002-12-23 FR FR0216486A patent/FR2849114B1/fr not_active Expired - Fee Related
-
2003
- 2003-12-19 EP EP03293260A patent/EP1433948B1/fr not_active Expired - Lifetime
- 2003-12-19 AT AT03293260T patent/ATE398235T1/de not_active IP Right Cessation
- 2003-12-19 DE DE60321533T patent/DE60321533D1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1217190A (fr) * | 1958-12-03 | 1960-05-02 | Dispositif silencieux d'aspiration pour compresseurs et moteurs analogues | |
US5979598A (en) * | 1996-04-22 | 1999-11-09 | Woco Franz-Josef Wolf & Co. | Intake silencer for motor vehicle |
DE19855708A1 (de) * | 1998-12-03 | 2000-06-08 | Dietrich Denker | Rohrkammerdämpfer |
DE19943246A1 (de) * | 1999-09-10 | 2001-03-22 | Daimler Chrysler Ag | Schalldämpfer zur Herabminderung der Luftgeräusche im Ansaugstrang von Brennkraftmaschinen |
GB2365066A (en) * | 2000-07-28 | 2002-02-13 | Draftex Ind Ltd | Noise attenuation arrangements for pressurised-gas conduits |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007058938B4 (de) * | 2007-07-30 | 2021-03-25 | Hyundai Motor Co. | Luftreinigungs-Einlasskanal |
EP2101057A1 (fr) * | 2008-03-12 | 2009-09-16 | Hutchinson | Dispositif d'atténuation acoustique pour ligne d'admission d'un moteur thermique, et ligne d'admission l'incorporant |
FR2928705A1 (fr) * | 2008-03-12 | 2009-09-18 | Hutchinson Sa | Dispositif d'attenuation acoustique pour ligne d'admission d'un moteur thermique,et ligne d'admission l'incorporant. |
DE102008020721A1 (de) * | 2008-04-23 | 2009-10-29 | J. Eberspächer GmbH & Co. KG | Schalldämpferbaugruppe für eine Abgasleitung |
WO2012055784A3 (fr) * | 2010-10-25 | 2012-07-19 | Umfotec Umformtechnik Gmbh | Silencieux pour conduits d'air de suralimentation d'un moteur à combustion interne doté d'un turbocompresseur |
US20130092472A1 (en) * | 2011-10-12 | 2013-04-18 | Ford Global Technologies, Llc | Acoustic attenuator for an engine booster |
US9097220B2 (en) * | 2011-10-12 | 2015-08-04 | Ford Global Technologies, Llc | Acoustic attenuator for an engine booster |
US9951728B2 (en) | 2011-10-12 | 2018-04-24 | Ford Global Technologies, Llc | Acoustic attenuator for an engine booster |
EP3112658A1 (fr) * | 2015-07-03 | 2017-01-04 | MANN+HUMMEL GmbH | Agencement de silencieux |
Also Published As
Publication number | Publication date |
---|---|
FR2849114B1 (fr) | 2007-04-13 |
DE60321533D1 (de) | 2008-07-24 |
EP1433948A3 (fr) | 2005-05-04 |
ATE398235T1 (de) | 2008-07-15 |
EP1433948B1 (fr) | 2008-06-11 |
FR2849114A1 (fr) | 2004-06-25 |
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