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WO2000045043A1 - Dispositif d'admission presentant une section de conduite servant a amortir le bruit d'admission - Google Patents

Dispositif d'admission presentant une section de conduite servant a amortir le bruit d'admission Download PDF

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Publication number
WO2000045043A1
WO2000045043A1 PCT/EP1999/010103 EP9910103W WO0045043A1 WO 2000045043 A1 WO2000045043 A1 WO 2000045043A1 EP 9910103 W EP9910103 W EP 9910103W WO 0045043 A1 WO0045043 A1 WO 0045043A1
Authority
WO
WIPO (PCT)
Prior art keywords
line section
volume
section
suction device
tube
Prior art date
Application number
PCT/EP1999/010103
Other languages
German (de)
English (en)
Inventor
Rolf Füsser
Heinz Müller
Helmut Spannbauer
Original Assignee
Filterwerk Mann+Hummel 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 Filterwerk Mann+Hummel Gmbh filed Critical Filterwerk Mann+Hummel Gmbh
Priority to EP99968355A priority Critical patent/EP1147305A1/fr
Publication of WO2000045043A1 publication Critical patent/WO2000045043A1/fr

Links

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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10354—Joining multiple sections together
    • F02M35/1036—Joining multiple sections together by welding, bonding or the like
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the invention relates to an intake device, in particular for the use of internal combustion engines, which has a line section for damping the intake noise, according to the preamble of claims 1, 4 and 5.
  • noises can be deleted by applying sound with the same sound spectrum but with the opposite phase of oscillation.
  • the resonance pipes act as branch paths in the air duct system, into which the sound penetrates and, after reflection at the end of the resonance pipe, begins the return path. If the sound reaches the junction again after this detour, the source of origin there now has a time-shifted phase position, which in the best case is exactly 180 °.
  • the phase shift depends on the wavelength of the sound to be canceled. In order to achieve a phase shift of 180 °, the Length of the resonance tube is just a quarter of the wavelength of the sound to be deleted.
  • FIG. 1 of this document an intake pipe 2 is shown, which is surrounded by a damping component 4, whereby an annular space 3 is created.
  • the intake pipe has openings that can be designed as holes 7.
  • the muffler described is equipped with connecting sleeves and can be installed in a suction device as a line section in this way.
  • This silencer acts as a shunt resonator.
  • the holes 7 form its necks and the annular space 3 its volume.
  • An oscillatory system is created which is connected to the line section via the holes.
  • the vibration processes generated by the shunt resonator superimpose the vibration behavior in the suction device, as a result of which noise reduction can be achieved.
  • a broadband effect can be achieved, i. H. that the noise reduction is not only effective for a selected frequency.
  • ancillary units such as. B. exhaust gas turbochargers, secondary air pumps or secondary air loaders, which represent additional noise sources in the environment of the internal combustion engine.
  • the composition of these noises differs from that of the reciprocating engine primarily in that their high Energy components are in a frequency range above 1,000 Hertz.
  • the object is therefore to provide a damping device for suction devices which is simple in construction and economical to manufacture and can be easily adapted to the frequency spectrum to be damped in the application. This object is solved by the features of claims 1, 4 and 5.
  • the suction device has a line section through which the suction medium flows and which is connected to at least one volume forming a resonance tube.
  • the resonance tube is like this formed that it forms a common wall section with the line section. Advantages for such a design result first of all from savings in terms of the installation space required.
  • the resonance pipes are in direct contact with the line section and do not protrude into the engine compartment at right angles to the line section. This creates greater design freedom for the intake device and its adaptation to the engine compartment. Subsequent attachment of resonance tubes designed in this way is also still conceivable.
  • the common wall section also saves material. This results in a weight saving that z. B. has a positive effect on the energy consumption of the motor vehicle.
  • the line section and the resonance tube essentially consist of an extruded profile, which is made in particular of plastic.
  • This extruded profile can be deflected depending on the application and provided with end pieces at the ends. These end pieces have the task of connecting the line section to the rest of the suction device. At the same time, the end pieces are used to close the resonance pipes at their ends and to connect them to the line section at the beginning.
  • the end pieces can also be formed as part of the adjoining elements of the suction device.
  • a connection between the extruded profile and end pieces can, for. B. by a welded connection or by an adhesive connection.
  • the damping characteristics of the line section can be influenced in a simple manner by varying the length of the extruded profile. The two end pieces can be kept unchanged.
  • the line section and the resonance tube are formed from shells and inserts. It is Z. B. conceivable to construct the line section from two half-shells, the outer contour of the resonance tube being introduced into these shells. The insert can then z. B. be positioned by vibration welding in the shell forming the resonance tube so that it forms the common wall portion, leaving an opening for connecting the two volumes. Instead of welded connections, snap connections or adhesive connections are equally conceivable. Instead of the insert part, a part forming the outer wall of the resonance tube can also be used, which part can be placed on the line section from the outside. The line section then does not have to be manufactured using multi-shell technology.
  • the line section for damping the intake noise has a connected volume which is separated from the line section in the region of two welded housing shells by the welded lip.
  • the line section does not have to be through which fluid flows. It can e.g. B. is also a resonance tube, which is made in two-shell technology.
  • a further volume is then partitioned off from this with the aid of the welding catch edge.
  • the volume must be connected to the line section. This is done through openings that are created by an appropriate design of the welding lip.
  • the rib forming the welding catch edge is regularly integrated into one of the shells to be welded. At the end of this rib there is a narrow gap towards the other shell.
  • this gap can be deliberately chosen so wide that there is an acoustic coupling of the volume with the line section.
  • the welding lip can also be broken through different openings. Depending on the design of the opening or the gap, specific acoustic effects can be achieved. Both the effects of a resonance tube and the effects of a shunt resonator can be used. If the gap dimension is increased to form the opening, this has the additional advantage that the requirements on the component tolerances are reduced. Broadband damping is achieved by providing the gap. In terms of design, there is no additional effort, since the weld lip is necessary to improve the surface properties of the inner pipe walls, which are formed by the shells. Is that through the The volume of the welded rim provided in a resonance tube can thus reduce the resonance frequency of this tube and expand its effect on a broadband frequency spectrum.
  • a further alternative solution provides for the volume which is connected to the line section through at least one opening to be accommodated in an annular space surrounding the line section, the opening being formed by a slot which runs along a division between the individual parts forming the line sections .
  • the slot along the division can be easily manufactured. He can e.g. B. in injection molds for the manufacture of the individual parts. The slot can run in such a way that all the volumes in the annular space are connected to the line section via this opening.
  • the annulus need not necessarily be circular; just as little as the line section itself.
  • the accommodation of the slot at the edge of a mold has the further advantage that its geometry can be easily changed by modifying these molds. It can e.g. B. in the edge region of the form inserts are provided, which are determining for the geometry of the slot and are simply replaced to implement different slot geometries. A new slot geometry then only requires the effort of a new insert, not an entire new mold.
  • a particularly advantageous embodiment of the invention provides that the slot runs around in the wall of the line section.
  • a transverse division of the line section can be achieved, which results in a pot-like structure of the molds for the individual parts of the line section.
  • the wall section forming the annular volume can also be provided in the two molds. This creates a flange-like interface of the outer walls of the annular volume, the z. B. can be glued, welded or screwed together.
  • the walls forming the line section are made somewhat shorter, so that a gap remains between these walls by connecting the individual parts. This gap forms the opening.
  • the parting plane that forms the gap must do not stand at right angles to the pipe wall. However, this is the most streamlined variant. However, any division is conceivable, which does not even have to lie in one plane.
  • An advantageous embodiment of the invention provides for the volumes in the annular space to be designed as a resonance tube.
  • At least one of the tube volumes with an average length of 85 mm. This is suitable for weakening or canceling out a vibration with a wavelength of 4 times, i.e. 340 mm. This wavelength corresponds to the 1000 Hertz tone component, which - as described above - is generated by additional noise sources in the intake device.
  • a variation of further tube volumes around the length of 85 mm then produces the effect of broadband attenuation in this frequency range.
  • By providing the tube volumes in the annular space a material-saving and inexpensive geometric configuration is achieved. It is also possible to provide several pipes of the same average length in order to produce particularly strong attenuation for certain frequencies. The average length of the pipes is therefore mentioned because the pipe end does not necessarily have to be at right angles to the walls of the resonance pipe. Only in this case would the pipe length be specified exactly. In the other cases, the mean pipe length is calculated as the arithmetic mean of all pipe lengths over the cross section.
  • the area left free by the slot essentially corresponds to the cross-sectional area of the line section.
  • the advantage of the slot area chosen in this way is a balance of the interaction between the Annular volume and the intake air flowing through the line section.
  • the line section is a circular cross section, which is surrounded by a circular cross section of the annular space.
  • the tube volumes can then be formed as circular ring segments by pulling radial walls between the inner and outer ring walls of the annular space.
  • Circular cross-sections have the optimal ratio between cross-sectional area and wall area. As a result, flow losses in the tube and the cost of materials for its production can be minimized.
  • a circular design has the advantage of an improved look.
  • a third part can advantageously be arranged as an intermediate piece. This extends into the interior of the assembly into the two connection parts and thereby generates additional tube volumes. There is then no longer a slot in the division between the two connection parts, but rather a plurality of slots which are formed by the ends of the intermediate piece and the ends of the wall of the line section in the connection parts.
  • Tube volumes generally mean the volumes formed in the annular space, in particular the circular ring segments in the case of an annular cross section. These can have any cross section, the cross section of these tube volumes being able to exceed h 2 by far. If this is the case, the volume thus formed tends to follow the damping principle of a shunt resonator. On In this way, broadband damping can be achieved with the proposed component geometry on the basis of both damping effects (resonance tube and shunt resonator). The transition between these two effects is fluid.
  • a variation of the slot width b can also be selected as an influencing factor.
  • a modification of the invention provides that the components described do not produce a module which has to be introduced into the suction device, but rather that the module-forming components are at least partially integrated into components of the suction device. So z. B. conceivable to provide one of the end parts at the outlet of an air filter housing, and the standard module parts can be combined with these. This makes it possible to achieve a further saving in weight and to avoid manufacturing and assembly outlay in large series production.
  • Figure 2 shows the section A - A of Figure 1, with the front of the
  • Figure 3 shows the longitudinal section through a line section consisting of two
  • FIG. 4 shows the cross section through a line section which is welded lengthwise, a volume being formed by the weld lip
  • Figure 5 shows the arrangement of a housed in the weld rim
  • FIG. 6 shows a broadband damper consisting of two connecting parts, the volumes being accommodated in an annular space which is connected to the line section by a slot
  • 7 shows the top view C - C according to FIG. 6, with covers on the
  • Figure 8 shows a broadband damper consisting of a connector, an intermediate piece and a connector integrated in a component of the suction device and
  • Figure 9 shows the schematically illustrated longitudinal section of an arrangement of two annular spaces in a line section, the two annular spaces being formed by an intermediate piece.
  • FIG. 1 shows a line section 10 which is suitable for forming volumes in the form of resonance tubes 11.
  • the resonance tubes have a common wall section 13 with a main cross-section 12 of the line section 10 through which the intake air flows.
  • the extruded profile 14 can be made of plastic. Commercial multi-chamber profiles can also be used as semi-finished products.
  • FIG. 2 shows how the extruded profile 14 can be provided with a connecting piece 15.
  • the connector is glued to the extruded profile and has a flange area 16 for connection to the rest of the intake tract.
  • the connecting piece has a lid area 17 and an opening area 18. It is connected to the extruded profile in such a way that the lid area 17 closes the one resonance tube and the opening area 18 forms an opening 19 in cooperation with the extruded profile has the same cross section as the resonance tube.
  • a part identical to the connector 15 can be turned by 180 ° (not shown). In this way, two resonance tubes of the same length are formed.
  • FIG. 3 shows a line section 10 which is manufactured using multi-shell technology.
  • the individual shells are glued or welded together.
  • a shape division 20 can be seen, which is located between an upper shell 21 and a lower shell 22.
  • a recess 23 forming the resonance tube is introduced into the lower shell, which is closed except for the opening 19 with a glued-in insert 24.
  • the insert 19 thus represents the common wall section 13.
  • the resonance tube formed in the recess 23 has the same cross section as the opening 19.
  • FIG. 4 shows a line section 10 which is vibration-welded via welding shoulders 25.
  • an inner wall 26 of the line section is formed by a weld catch edge 27, which normally covers a cavity 28 located behind it, which is intended to receive a bead formed during the welding.
  • the cavity can also be expanded to a resonance volume 29.
  • this is formed by the upper shell 21.
  • the welding rim 27 is provided both in the upper shell and in the lower shell.
  • the edges of the welding catch edges 27 form a relatively wide gap, which forms the opening 19 and ensures a connection between the resonance volume and the line section.
  • a broadband resonator is realized in this way.
  • FIG. 5 shows a variant in which the weld rim of a two-shell resonance tube 11 is used. Elongated holes 30 are formed in the weld rim, which enable a connection of the circumferential cavity 28 to the resonance tube 11.
  • the resonance tube opens into a housing 31, which is designed as part of the suction device, not shown.
  • the cavity 28 behind the welding rim 27 does not have to be increased in volume in order to act as a resonance volume. If only the gap of the welding edge in the area of the clean air line of the suction device z. B. enlarged to 1.2 mm, not only the overall noise of the suction device in the upper speed range, but also by the 4 kilohertz octave band, which is perceived by humans as unpleasant. The engine power remains unaffected by this acoustic measure.
  • a reduction in the resonance frequencies of the suction device can also be achieved by the design measure described, which is desirable in some cases.
  • Figure 6 shows the section through a broadband damper.
  • This consists of two connecting parts 32 which, for. B. can be designed as a connector 33 for connection to a hose.
  • the two connecting parts form the main cross section 12 and an annular space 34 which surrounds the main cross section.
  • Outer walls 35 have welding shoulders 25 so that the connecting parts can be connected to one another.
  • the arrangement of a welding catch edge according to FIG. 4 is conceivable in this area.
  • the annular space 34 is separated from the main cross section 12 by partition walls 36. End faces 37 of the intermediate walls 36 have an axial offset with respect to the welding shoulders 25, such that the end faces 37 form a radially circumferential slot when the connecting parts 32 are connected to one another, which connects the main cross section 12 to the annular space 34.
  • annular space 34 In the annular space 34, individual tube volumes 39 are divided by radial walls 38. These are each connected to the main cross section 12 via the slot 40.
  • the division of the annular space 34 into tubular segments 39 in the form of a ring segment can take place as desired and does not have to match in the two connecting parts.
  • the slot 40 can be closed over parts of the circumference by covers 41.
  • FIG. 7 represents the supervisory level CC according to FIG. 6.
  • the covers are on the end face formed in this way, which can be seen here in supervision 41, the z. B. can be made of rubber, glued. These can e.g. B. Prevent coupling effects between adjacent tube volumes. It is also possible to create a resonance chamber that is completely closed off from the adjacent tube volumes by attaching the cover to the end faces of the radial walls. This then acts as a shunt resonator, the opening 19a being divided from the slot through the cover.
  • FIG. 8 shows a broadband damper which works on the principle of the device according to FIG. 6.
  • the other connecting part has been replaced by a receptacle 42, which is part of the housing 31, the housing 31 belonging to the suction device, not shown.
  • the receptacle can be connected to the connecting part.
  • an intermediate piece 43 is also introduced into this connection.
  • this has tube volumes 39a and forms slots 40 with these parts at both ends. These run radially in the main cross section; however, the slot plane is not perpendicular to the flow direction of the main cross section, but rather at an angle. In this way, tube volumes 39 of different lengths can be generated by a straight boundary wall 44.
  • FIG. 9 shows the schematic representation of an alternative embodiment of the intermediate piece 43. Two nested annular spaces 34 are created by this.
  • the connection parts 32 have no tube volumes.
  • the tube volumes 39a are formed only by the intermediate piece.
  • the individual parts 32, 42, 43 according to FIGS. 6 to 9 can be designed in such a way that they can be combined with one another. In this way, a modular system is created which has basic elements which can be combined using the covers 41 to form optimal broadband attenuators for the respective application. In the case of large-scale production, the shapes for the individual parts can then be adapted to a special application.

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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)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Pipe Accessories (AREA)

Abstract

L'invention concerne un dispositif d'admission s'utilisant notamment dans un moteur à combustion interne et présentant une section de conduite qui sert à amortir le bruit d'admission. De tels dispositifs sont également nécessaires pour amortir les bruits provoqués par des groupes auxiliaires dans le dispositif d'admission. L'invention vise à réduire le plus possible le surcroît de complexité qui en découle. A cet effet, les solutions selon l'invention permettent d'une part une fabrication simple et d'autre part une souplesse d'adaptation aux bandes de fréquence à amortir. Par exemple, la bordure d'arrêt de soudure (27), dans une tubulure d'admission (10) constituée de coques soudées (21, 22), peut être utilisée pour séparer un volume de résonance (29), les bords d'arrêt de soudure formant un espace suffisamment important. Cette solution ne nécessite pas le recours à des composants supplémentaires, mais seulement à une quantité de matériau légèrement supérieure. Elle peut servir également à améliorer ultérieurement l'acoustique d'admission, des modifications minimes étant alors effectuées dans les outils de coulée pour les coques (21, 22).
PCT/EP1999/010103 1999-01-26 1999-12-18 Dispositif d'admission presentant une section de conduite servant a amortir le bruit d'admission WO2000045043A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99968355A EP1147305A1 (fr) 1999-01-26 1999-12-18 Dispositif d'admission presentant une section de conduite servant a amortir le bruit d'admission

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999102951 DE19902951A1 (de) 1999-01-26 1999-01-26 Ansaugvorrichtung mit einem Leitungsabschnitt zur Dämpfung des Ansauggeräusches
DE19902951.2 1999-01-26

Publications (1)

Publication Number Publication Date
WO2000045043A1 true WO2000045043A1 (fr) 2000-08-03

Family

ID=7895383

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/010103 WO2000045043A1 (fr) 1999-01-26 1999-12-18 Dispositif d'admission presentant une section de conduite servant a amortir le bruit d'admission

Country Status (3)

Country Link
EP (1) EP1147305A1 (fr)
DE (1) DE19902951A1 (fr)
WO (1) WO2000045043A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012000806B4 (de) * 2011-02-16 2017-09-28 Mann + Hummel Gmbh Resonatorsystem
DE102019106968A1 (de) * 2019-03-19 2020-09-24 Deutsches Zentrum für Luft- und Raumfahrt e.V. Fluidrohr für gasförmige Fluide mit einem runden Querschnitt und mindestens einem Kammerresonator sowie Brennkraftmaschine mit einem solchen Fluidrohr

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DE20113496U1 (de) 2001-08-14 2001-10-18 Dr.Ing.H.C. F. Porsche Ag, 70435 Stuttgart Sauganlage für eine Brennkraftmaschine
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
KR100957142B1 (ko) * 2007-07-30 2010-05-11 현대자동차주식회사 에너 클리너 흡기 덕트
DE102012024512A1 (de) 2012-12-14 2014-06-18 Daimler Ag Schalldämpfungseinrichtung für eine Verbrennungskraftmaschine

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FR1217190A (fr) * 1958-12-03 1960-05-02 Dispositif silencieux d'aspiration pour compresseurs et moteurs analogues
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FR2163938A5 (fr) * 1971-12-07 1973-07-27 Lautrette Jean
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US5014816A (en) * 1989-11-09 1991-05-14 E. I. Du Pont De Nemours And Company Silencer for gas induction and exhaust systems
JPH07293378A (ja) * 1994-04-26 1995-11-07 Toyoda Gosei Co Ltd 吸気ホース
JPH0849611A (ja) * 1994-08-08 1996-02-20 Toyoda Gosei Co Ltd 吸気ホース
DE19504223A1 (de) 1995-02-09 1996-08-14 Volkswagen Ag Schalldämpfer für den Ansaugkanal einer Brennkraftmaschine
WO1997017531A1 (fr) * 1995-11-06 1997-05-15 Tennex Europe Limited Attenuateur de bruits pour systeme d'admission ou d'echappement
DE19603979A1 (de) 1996-02-05 1997-08-07 Opel Adam Ag Schalldämpfer, insbesondere Ansaugschalldämpfer für eine Brennkraftmaschine eines Kraftfahrzeuges
US5756945A (en) * 1994-08-24 1998-05-26 Toyoda Gosei Co., Ltd. Muffler
US5783780A (en) * 1995-11-27 1998-07-21 Nissan Motor Co., Ltd Sound absorption structure
JPH11117819A (ja) * 1997-10-09 1999-04-27 Toyota Motor Corp 樹脂製インテークマニホールド

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DE59813724D1 (de) * 1997-06-20 2006-10-26 Mann & Hummel Gmbh Ansaugsystem, insbesondere zur verwendung als ansaugkanal einer verbrennungskraftmaschine
DE19751940C1 (de) * 1997-11-24 1999-03-25 Mann & Hummel Filter Schalldämpfer mit einem Nebenschlußresonator

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2039800A (en) * 1933-07-19 1936-05-05 Burgess Lab Inc C F Silencer
FR1217190A (fr) * 1958-12-03 1960-05-02 Dispositif silencieux d'aspiration pour compresseurs et moteurs analogues
GB996286A (en) * 1960-09-17 1965-06-23 Alfred Kreidler Improvements in or relating to intake systems for internal combustion engines
FR2163938A5 (fr) * 1971-12-07 1973-07-27 Lautrette Jean
US4239461A (en) * 1978-11-06 1980-12-16 Copeland Corporation Compressor induction system
JPS62126215A (ja) * 1985-11-26 1987-06-08 Honda Motor Co Ltd サイドブランチ型消音装置
US5014816A (en) * 1989-11-09 1991-05-14 E. I. Du Pont De Nemours And Company Silencer for gas induction and exhaust systems
JPH07293378A (ja) * 1994-04-26 1995-11-07 Toyoda Gosei Co Ltd 吸気ホース
JPH0849611A (ja) * 1994-08-08 1996-02-20 Toyoda Gosei Co Ltd 吸気ホース
US5756945A (en) * 1994-08-24 1998-05-26 Toyoda Gosei Co., Ltd. Muffler
DE19504223A1 (de) 1995-02-09 1996-08-14 Volkswagen Ag Schalldämpfer für den Ansaugkanal einer Brennkraftmaschine
WO1997017531A1 (fr) * 1995-11-06 1997-05-15 Tennex Europe Limited Attenuateur de bruits pour systeme d'admission ou d'echappement
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