WO2020160870A1 - Air channel for a motor vehicle and method for the production thereof - Google Patents
Air channel for a motor vehicle and method for the production thereof Download PDFInfo
- Publication number
- WO2020160870A1 WO2020160870A1 PCT/EP2020/050536 EP2020050536W WO2020160870A1 WO 2020160870 A1 WO2020160870 A1 WO 2020160870A1 EP 2020050536 W EP2020050536 W EP 2020050536W WO 2020160870 A1 WO2020160870 A1 WO 2020160870A1
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- WIPO (PCT)
- Prior art keywords
- air
- air inlet
- endless profile
- wall
- air duct
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title description 5
- 230000003584 silencer Effects 0.000 claims description 13
- 238000004378 air conditioning Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 239000011358 absorbing material Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00564—Details of ducts or cables of air ducts
-
- 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
- F02M35/12—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
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
- F16L55/02781—The regulating element being provided with radial outputs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H2001/006—Noise reduction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/242—Sound-absorbing material
Definitions
- the invention relates to an air duct for a motor vehicle, in particular as part of its heating, ventilation and / or air conditioning system, as part of the air or exhaust gas path of its internal combustion engine or, alternatively, the air path of its fuel cell drive.
- JP 2006 123659 A discloses an air duct for a motor vehicle with an air outlet, a housing for sound absorption being arranged downstream of the air outlet.
- the housing has an acoustic chamber with an air-permeable element that absorbs sound.
- DE 104 41 319 A1 EP 1 510 667 A2, DE 10 201 1 008 518 A1, DE 10 2010 027 374 A1, DE 10 2006 057 823 A1 and the generic die DE 103 31 139 A1.
- an air duct for a motor vehicle, for example a dimensionally stable metal or plastic duct.
- the air duct has a cylindrical air inlet and a cylindrical endless profile.
- an air inlet is also an air outlet, since the direction of flow is not important for the technical solution explained below.
- the air inlet has a cylindrical cross section and, in particular, has a closed one (apart from certain through openings, which are shown below are explained) cylindrical outer wall.
- the air inlet has openings or holes through it.
- the endless profile has at least one from its inner wall inwardly protruding web, the base of which rests on the outer wall of the air inlet.
- the endless profile forms, together with at least part of the outer wall of the air inlet, a silencer with at least one resonator chamber.
- air flows e.g. Fresh air or exhaust gases
- the air duct reaches the area of the endless profile.
- Part of the air and thus the sound waves pass through the through openings into the resonator chambers and attenuate the sound in the corresponding frequency range, which is largely determined by the geometry of the resonator chambers and the through openings (e.g. round, rectangular or diamond-shaped) , wherein the openings can be produced by punching.
- the air inlet outer wall or at least part of it forms a first part of the muffler and the endless profile forms a corresponding second part of the muffler, which saves material for the provision of the muffler.
- the endless profile is positioned outside the air inlet.
- the protruding end of the web rests on the outer wall of the air inlet and the air inlet has the through openings through which air can flow into the resonator chamber thus formed.
- the web significantly defines the geometry of the resonator chambers and thus the resonator shaft.
- the amount by which the web protrudes from the endless profile (hereinafter referred to as “height”) can either be selected to be fixed for the modular sound absorber or be selected as an integral multiple of a base height.
- a cylindrical endless profile is provided and there are at least two annular partition walls protruding radially from the air inlet and / or from the endless profile.
- the resonator chamber can be closed in the axial direction so that it forms a closed chamber.
- the endless profile which has the protruding webs, also has the corresponding protruding partition walls, but this is not mandatory.
- an embodiment can be implemented in which the endless profile is pushed over the air inlet to form a non-positive connection. Installation is therefore particularly simple and also allows existing vehicles to be provided with a silencer at a later date that eliminates disturbing noises.
- This solution is suitable for combinations of dimensionally stable air ducts and dimensionally stable endless profiles, especially in the case of such parts made of metal or hard plastic.
- the air duct can be designed in such a way that the endless profile is glued to the outer wall of the air inlet, possibly by friction welding, or is sprayed onto it.
- This is particularly useful if both the air inlet and the endless profile are made of plastic, because in this case the components can be fixed against each other, which prevents rattling noises caused by relative movements.
- a (subsequent) spraying of the endless profile onto the air inlet is more advisable if the spraying is to take place on the outer wall of the air duct, since cavities have to be created.
- This embodiment also makes it possible to subsequently provide corresponding air ducts with a silencer.
- the resonator chambers are formed from a sound-absorbing material, for example from a fleece.
- the walls of the resonator chambers can be designed in such a way that the air duct and / or the dimensionally stable endless profile consist of the sound-absorbing material.
- the interior of the resonator can contain such a sound-absorbing material which can also be regarded as part of the resonator. This allows sound attenuation to be achieved in a broader frequency range.
- the endless profile of one or more of the above embodiments to have openings of different geometries and / or sizes. This means that any number of frequency ranges can be damped.
- the drilling diameter correlates well with the resonance frequency. Attenuation of several reso- nanzfrequenzen results from the use of several webs, because then several resonator chambers arise, each of which can be designed for damping a different resonance frequency.
- the resonator chambers are provided at the air inlet or outlet, and possibly inside it.
- the air inlet can have an expansion area, in particular an elongate expansion area.
- the widening area can also project beyond the silencer in the longitudinal direction, in particular by approx. 1 cm to approx. 10 cm, in order to make it easier to connect the sound-insulated air duct to other components.
- a particularly practical use of the air duct described above results when it is used in a motor vehicle for connecting a person air inlet to introduce air into the vehicle interior, since the silencer can be arranged in the connection area richly. This enables efficient sound insulation very close to where the sound is generated.
- Other sources of sound that can be attenuated with the silencer described above are fans in which noises arise due to air acceleration, heat exchangers where air detachment noises can occur and flow channels in the fresh or recirculated air area of a vehicle air conditioning system.
- connection dimensions there is a modular principle for the user with standardized connection dimensions.
- one or more endless profiles are provided in production, which define the dimensions of the respective resonator chambers.
- the through openings that are appropriate in terms of geometry and cross-section are selected, which can be easily determined experimentally or by simulations.
- the air duct can also be used universally because it can be part of an air guiding element or a component of a component of a motor vehicle heating, ventilation and / or air conditioning system, in particular an air vent or air intake or the air conditioning unit itself, or a component of an air or air conditioning system
- the exhaust path of an internal combustion engine, in particular a turbocharger inlet or outlet Use for the air path of a fuel cell drive is also possible.
- the integration of the silencer at the air inlet or outlet results in a compact silencer with minimal Increased installation space, in which the air duct described can also be a fitting or connection piece.
- a second aspect of the invention relates to a method for providing a sound-damped air duct or a manufacturing method. It has the steps according to claim 9.
- This method makes it possible, particularly when the endless profile is pushed over the air inlet to form a non-positive connection, to provide an air duct with sound absorption in a particularly simple manner.
- Another aspect relates to the use of an endless profile equipped with at least one web and openings to form a silencer on an air inlet of a component of a motor vehicle heating, ventilation and / or air conditioning system or on an air inlet of a component of an air or exhaust gas path Internal combustion engine.
- Fig. 1 shows a cylindrical air duct 5 in axial section and Fig. 2 this korrespondie rend the same air duct 5 looking in the direction of the cylinder axis Z.
- the air duct 5 has a cylindrical endless profile 1, the four of its inner wall 11 protrude radially inward de , Webs 2 owns.
- the base points 4 of the webs 2 lie on the outer wall of the Lucaseinlas 14 ses.
- four resonator chambers 8, 8 ', 8 ", 8'” are formed between the endless profile 1 and the air inlet 14, each of which has an opening 3 through which air can flow.
- the endless profile 1 can be cut to length and inserted into the interior of a cylindrical air inlet 14 to form a force-fit connection.
- webs can be selected which are arranged obliquely with respect to the radial direction or at an angle> 0 ° to this, preferably at an angle ⁇ 45 °.
Abstract
The invention relates to an air channel for a motor vehicle comprising a cylindrical air inlet (14) and a cylindrical continuous profile (1), wherein the air inlet has through-openings (3), wherein the continuous profile has at least one section (2, 2, 2") protruding inwards from the inner wall (11) thereof, wherein the foot (4) of said section lies against the outer wall of the air inlet (14), and wherein the continuous profile (1) forms a sound absorber (12) having at least one resonator chamber (8, 8', 8") together with at least one part of the outer wall of the air inlet (14).
Description
LUFTKANAL FÜR EIN KRAFTFAHRZEUG SOWIE VERFAHREN FÜR SEINE AIR DUCT FOR A MOTOR VEHICLE AND PROCEDURE FOR ITS
HERSTELLUNG MANUFACTURING
Die Erfindung betrifft einen Luftkanal für ein Kraftfahrzeug, insbesondere als Bestandteil von dessen Heizungs-, Belüftungs- und/oder Klimaanlage, als Bestandteil des Luft- oder Abgaspfads seines Verbrennungsmotors oder alternativ hierzu des Luftpfads seines Brennstoffzellenantriebs. The invention relates to an air duct for a motor vehicle, in particular as part of its heating, ventilation and / or air conditioning system, as part of the air or exhaust gas path of its internal combustion engine or, alternatively, the air path of its fuel cell drive.
Die Luftströmung in Luftkanälen führt bei Kraftfahrzeugen oftmals zu unerwünschten Störgeräuschen, die geeignet gedämpft werden müssen. So sieht die DE 20 2013 105 639 A1 eine schalldämmende Innenbeschichtung des Luftkanals vor. Die DE 10 2016 1 18 583 A1 zeigt eine Belüftungseinrichtung, die angrenzend am Luftauslass einen Helmholtzresonator zur Schalldämmung aufweist. Die JP 2006 123659 A offenbart einen Luftkanal für ein Kraftfahrzeug mit einem Luftauslass, wobei stromabwärts des Luftauslasses ein Gehäuse zur Schallabsorption angeordnet ist. Das Gehäuse besitzt eine Akustikkammer mit einem luftpermeablen Element, das den Schall absorbiert. Aus dem Stand der Technik bekannt sind ferner die DE 104 41 319 A1 , die EP 1 510 667 A2, die DE 10 201 1 008 518 A1 , die DE 10 2010 027 374 A1 , die DE 10 2006 057 823 A1 und die gattungsbildende die DE 103 31 139 A1 . In motor vehicles, the air flow in air ducts often leads to undesirable background noises which must be suitably attenuated. For example, DE 20 2013 105 639 A1 provides a sound-absorbing inner coating of the air duct. DE 10 2016 1 18 583 A1 shows a ventilation device which, adjacent to the air outlet, has a Helmholtz resonator for sound insulation. JP 2006 123659 A discloses an air duct for a motor vehicle with an air outlet, a housing for sound absorption being arranged downstream of the air outlet. The housing has an acoustic chamber with an air-permeable element that absorbs sound. Also known from the prior art are DE 104 41 319 A1, EP 1 510 667 A2, DE 10 201 1 008 518 A1, DE 10 2010 027 374 A1, DE 10 2006 057 823 A1 and the generic die DE 103 31 139 A1.
Demgegenüber ist es eine Aufgabe einer Ausführungsform der Erfindung, einen Luftkanal mit einem modular aufgebauten Schalldämpfer bereitzustellen. In contrast, it is an object of an embodiment of the invention to provide an air duct with a modular silencer.
Die Lösung dieser und weiterer Aufgaben erfolgt durch die Merkmale der unabhängigen Merkmale. Vorteilhafte Weiterbildungen werden durch die abhängigen Merkmale wiedergegeben. The solution to these and other tasks is provided by the characteristics of the independent characteristics. Advantageous developments are represented by the dependent features.
Gemäß einer Ausführungsform ist ein Luftkanal für ein Kraftfahrzeug vorgesehen, bspw. ein formstabiler Metall- oder Kunststoffkanal. Der Luftkanal besitzt einen zylindrischen Lufteinlass und ein zylindrisches Endlosprofil. Für die Zwecke dieser Beschreibung ist ein Lufteinlass auch ein Luftauslass, da es für die nachstehend erläuterte technische Lösung nicht auf die Strömungsrichtung ankommt. Der Lufteinlass hat einen zylindrischen Querschnitt und hat insbesondere eine geschlossene (bis auf gewisse durchgehende Öffnungen, die nachfolgend
erläutert werden) zylindrische Außenwand. Der Lufteinlass besitzt durchgehende Öffnungen bzw. Löcher. Das Endlosprofil hat mindestens einen von seiner Innenwand nach innen ab ragenden Steg, dessen Fußpunkt auf der Außenwand des Lufteinlasses aufliegt. Das Endlos profil bildet zusammen mit zumindest einem Teil der Außenwand des Lufteinlasses einen Schalldämpfer mit zumindest eine Resonatorkammer. According to one embodiment, an air duct is provided for a motor vehicle, for example a dimensionally stable metal or plastic duct. The air duct has a cylindrical air inlet and a cylindrical endless profile. For the purposes of this description, an air inlet is also an air outlet, since the direction of flow is not important for the technical solution explained below. The air inlet has a cylindrical cross section and, in particular, has a closed one (apart from certain through openings, which are shown below are explained) cylindrical outer wall. The air inlet has openings or holes through it. The endless profile has at least one from its inner wall inwardly protruding web, the base of which rests on the outer wall of the air inlet. The endless profile forms, together with at least part of the outer wall of the air inlet, a silencer with at least one resonator chamber.
Im praktischen Einsatz strömt Luft, z.B. Frischluft oder Abgase, durch den Luftkanal und ge langt zum Bereich des Endlosprofils. Ein Teil der Luft und damit der Schallwellen gelangt durch die durchgehenden Öffnungen in die Resonatorkammern und dämpft den Schall in dem entsprechenden Frequenzbereich, der maßgeblich durch die Geometrie der Resonator kammern und der durchgehenden Öffnungen (bspw. rund, rechteckig, oder rautenförmig) vor gegeben ist, wobei die Öffnungen durch Ausstanzen erzeugt werden können. Hierbei bildet die Lufteinlassaußenwand oder zumindest ein Teil davon einen ersten Teil des Schalldämp fers und das Endlosprofil einen hierzu korrespondierenden zweiten Teil des Schalldämpfers, was für die Bereitstellung des Schalldämpfers materialsparend ist. In practical use, air flows, e.g. Fresh air or exhaust gases, through the air duct and reaches the area of the endless profile. Part of the air and thus the sound waves pass through the through openings into the resonator chambers and attenuate the sound in the corresponding frequency range, which is largely determined by the geometry of the resonator chambers and the through openings (e.g. round, rectangular or diamond-shaped) , wherein the openings can be produced by punching. Here, the air inlet outer wall or at least part of it forms a first part of the muffler and the endless profile forms a corresponding second part of the muffler, which saves material for the provision of the muffler.
Das Endlosprofil ist außerhalb des Lufteinlasses positioniert. Das abragende Ende des Stegs liegt auf der Außenwand des Lufteinlasses auf und der Lufteinlass besitzt die durchgehenden Öffnungen, durch die Luft in die somit gebildete Resonatorkammer einströmen kann. Dies ist eine baulich einfache und modulare Lösung, weil ein standardisiertes Endlosprofil verwendet wird, das auf Länge geschnitten wird, insbesondere mit einer Länge, die ein ganzzahlig Viel faches einer Mindestlänge ist. The endless profile is positioned outside the air inlet. The protruding end of the web rests on the outer wall of the air inlet and the air inlet has the through openings through which air can flow into the resonator chamber thus formed. This is a structurally simple and modular solution because a standardized endless profile is used, which is cut to length, in particular with a length that is an integral multiple of a minimum length.
Liegt das abstehende Ende des Stegs auf der Außenwand des Lufteinlasses auf, so definiert der Steg maßgeblich die Geometrie der Resonatorkammern und damit die Resonanzeigen schaft. Insofern kann auch das Maß, um den der Steg vom Endlosprofil abragt (nachfolgend als„Höhe“ bezeichnet), für den modular aufgebauten Schalldämpfer entweder fix gewählt werden oder als ganzzahlig Vielfaches einer Basishöhe gewählt sein. If the protruding end of the web rests on the outer wall of the air inlet, the web significantly defines the geometry of the resonator chambers and thus the resonator shaft. In this respect, the amount by which the web protrudes from the endless profile (hereinafter referred to as “height”) can either be selected to be fixed for the modular sound absorber or be selected as an integral multiple of a base height.
Bei einer weiteren Ausführungsform ist ein zylindrisches Endlosprofil vorgesehen und gibt es zumindest zwei kreisringförmige, radial vom Lufteinlass und/oder vom Endlosprofil abragende Trennwände. Mit diesen lässt sich die Resonatorkammer in axialer Richtung schließen, so dass diese eine geschlossene Kammer bildet. Fertigungstechnisch bietet es sich an, dass
das Endlosprofil, das die abragenden Stege besitzt, auch die entsprechend abragenden Trennwände hat, aber dies ist nicht zwingend. In a further embodiment, a cylindrical endless profile is provided and there are at least two annular partition walls protruding radially from the air inlet and / or from the endless profile. With these, the resonator chamber can be closed in the axial direction so that it forms a closed chamber. In terms of production technology, it makes sense that the endless profile, which has the protruding webs, also has the corresponding protruding partition walls, but this is not mandatory.
Weiterhin ist eine Ausführungsform realisierbar, bei der das Endlosprofil unter Bildung einer kraftschlüssigen Verbindung über den Lufteinlass geschoben ist. Die Montage ist damit besonders einfach und lässt es auch zu, bei Bestandsfahrzeugen nachträglich einen Schalldämpfer bereitzustellen, der störende Geräusche beseitigt. Diese Lösung ist geeignet für Kombinationen aus formstabilem Luftkanal und formstabilem Endlosprofil, insbesondere bei derartigen Teilen aus Metall oder einer Hartplastik. Furthermore, an embodiment can be implemented in which the endless profile is pushed over the air inlet to form a non-positive connection. Installation is therefore particularly simple and also allows existing vehicles to be provided with a silencer at a later date that eliminates disturbing noises. This solution is suitable for combinations of dimensionally stable air ducts and dimensionally stable endless profiles, especially in the case of such parts made of metal or hard plastic.
Weiterhin kann der Luftkanal so ausgeführt sein, dass das Endlosprofil mit der Außenwand des Lufteinlasses verklebt, ggf. durch Reibschweißen, oder auf diesem aufgespritzt ist. Dies bietet sich besonders dann an, wenn sowohl der Lufteinlass als auch das Endlosprofil aus Kunststoff ausgeführt sind, denn in diesem Fall lassen sich dadurch die Bauteile gegeneinander fixieren, was Klappergeräusche durch Relativbewegungen vermeidet. Ein (nachträgliches) Aufspritzen des Endlosprofils auf den Lufteinlass bietet sich eher dann an, wenn das Aufspritzen auf der Außenwand des Luftkanals erfolgen soll, da Hohlräume geschaffen werden müssen. Auch diese Ausführungsform lässt es zu, nachträglich entsprechende Luftkanäle mit einem Schalldämpfer zu versehen. Furthermore, the air duct can be designed in such a way that the endless profile is glued to the outer wall of the air inlet, possibly by friction welding, or is sprayed onto it. This is particularly useful if both the air inlet and the endless profile are made of plastic, because in this case the components can be fixed against each other, which prevents rattling noises caused by relative movements. A (subsequent) spraying of the endless profile onto the air inlet is more advisable if the spraying is to take place on the outer wall of the air duct, since cavities have to be created. This embodiment also makes it possible to subsequently provide corresponding air ducts with a silencer.
Weiterhin kann eine weitere Ausführungsform gewählt sein, bei der zumindest ein Teil der Resonatorkammern aus einem schallabsorbierenden Material gebildet ist, bspw. aus einem Vlies. So können die Wände der Resonatorkammern derart beschaffen sein, indem der Luftkanal und/oder das formstabile Endlosprofil aus dem schallabsorbierenden Material bestehen. Zusätzlich oder alternativ hierzu kann das Innere des Resonators derartiges schallabsorbierendes Material enthalten, das auch als Teil des Resonators angesehen werden kann. Dadurch lässt sich in einem breiteren Frequenzbereich eine Schalldämpfung bewirken. Furthermore, another embodiment can be selected in which at least some of the resonator chambers are formed from a sound-absorbing material, for example from a fleece. The walls of the resonator chambers can be designed in such a way that the air duct and / or the dimensionally stable endless profile consist of the sound-absorbing material. In addition or as an alternative to this, the interior of the resonator can contain such a sound-absorbing material which can also be regarded as part of the resonator. This allows sound attenuation to be achieved in a broader frequency range.
Weiterhin ist es möglich, dass das Endlosprofil einer oder mehrerer der obigen Ausführungsformen Öffnungen unterschiedlicher Geometrie und/oder Größe aufweist. Damit können beliebig viele Frequenzbereiche gedämpft werden. Bei gebohrten Öffnungen korreliert zum Beispiel der Bohrdurchmesser gut mit der Resonanzfrequenz. Eine Dämpfung mehrerer Reso-
nanzfrequenzen ergibt sich bei Einsatz mehrerer Stege, weil dann mehrere Resonatorkam mern entstehen, die jede für sich zum Dämpfen einer anderen Resonanzfrequenz ausgelegt sein kann. Furthermore, it is possible for the endless profile of one or more of the above embodiments to have openings of different geometries and / or sizes. This means that any number of frequency ranges can be damped. In the case of drilled openings, for example, the drilling diameter correlates well with the resonance frequency. Attenuation of several reso- nanzfrequenzen results from the use of several webs, because then several resonator chambers arise, each of which can be designed for damping a different resonance frequency.
Wie vorstehend ausgeführt sind die Resonatorkammern am Luftein- oder -auslass vorgese hen, und dabei ggf. in dessen Inneren. Um dort eine Querschnittsverengung des Luftstroms zu vermeiden kann der Lufteinlass einen Aufweitungsbereich, insbesondere einen länglichen Aufweitungsbereich, besitzen. Auch kann, zusätzlich oder alternativ, der Aufweitungsbereich den Schalldämpfer in Längsrichtung überragen, insbesondere um ca. 1 cm bis ca. 10 cm, um ein Verbinden des schallgedämmten Luftkanals mit weiteren Bauteilen zu erleichtern. As stated above, the resonator chambers are provided at the air inlet or outlet, and possibly inside it. In order to avoid a cross-sectional narrowing of the air flow there, the air inlet can have an expansion area, in particular an elongate expansion area. In addition or as an alternative, the widening area can also project beyond the silencer in the longitudinal direction, in particular by approx. 1 cm to approx. 10 cm, in order to make it easier to connect the sound-insulated air duct to other components.
Ein besonders praktischer Einsatz des oben beschriebenen Luftkanals ergibt sich, wenn er bei einem Kraftfahrzeug zum Anschluss eines Personenanströmers zum Einleiten von Luft in den Fahrzeuginnenraum genutzt wird, da sich darüber der Schalldämpfer im Anschlussbe reich anordnen lässt. Dies ermöglicht eine effiziente Schalldämmung sehr nah am Ort der Schallentstehung. Weitere Schallquellen, die mit dem oben beschriebenen Schalldämpfer ge dämpft werden können, sind Gebläse, bei der durch Luftbeschleunigung Geräusche entste hen, Wärmetauscher, an denen Luftablösegeräusche entstehen können sowie Strömungska näle im Frisch- oder Umluftbereich einer Kfz-Klimaanlage. A particularly practical use of the air duct described above results when it is used in a motor vehicle for connecting a person air inlet to introduce air into the vehicle interior, since the silencer can be arranged in the connection area richly. This enables efficient sound insulation very close to where the sound is generated. Other sources of sound that can be attenuated with the silencer described above are fans in which noises arise due to air acceleration, heat exchangers where air detachment noises can occur and flow channels in the fresh or recirculated air area of a vehicle air conditioning system.
Im praktischen Einsatz ergibt sich für den Anwender ein Baukastenprinzip mit standardisier tem Anschlussmaß. Für einen zu verwendenden Luftkanal werden in der Fertigung ein oder mehrere Endlosprofile vorgesehen, die die Abmessungen der jeweiligen Resonatorkammern festlegen. Für die derart festgelegten Resonatorkammern werden dann je nach zu dämpfen den Frequenzen die hinsichtlich Geometrie und Querschnitt passenden durchgehenden Öff nungen gewählt, die sich experimentell oder durch Simulationen leicht bestimmen lassen.In practical use, there is a modular principle for the user with standardized connection dimensions. For an air duct to be used, one or more endless profiles are provided in production, which define the dimensions of the respective resonator chambers. For the resonator chambers established in this way, depending on the frequencies to be attenuated, the through openings that are appropriate in terms of geometry and cross-section are selected, which can be easily determined experimentally or by simulations.
Der Luftkanal ist zudem universell einsetzbar, denn er kann Teil eines Luftleitelements bzw. eines Bestandteil einer Komponente einer Kfz-Heizungs-, Belüftungs- und/oder Klimaanlage, insbesondere eines Ausströmers bzw. Personenanströmers oder des Klimageräts selbst, oder einer Komponente eines Luft- oder Abgaspfads eines Verbrennungsmotors, insbeson dere eines Turboladereingang oder - ausgangs sein. Auch eine Verwendung für den Luftpfad eines Brennstoffzellenantriebes ist möglich. In allen Fällen ergibt sich durch die Integration des Schalldämpfers am Luftein- oder -auslass ein kompakter Schalldämpfer mit minimaler
Bauraumvergrößerung, bei der der beschriebene Luftkanal auch ein Fitting bzw. Verbin dungsstück sein kann. The air duct can also be used universally because it can be part of an air guiding element or a component of a component of a motor vehicle heating, ventilation and / or air conditioning system, in particular an air vent or air intake or the air conditioning unit itself, or a component of an air or air conditioning system The exhaust path of an internal combustion engine, in particular a turbocharger inlet or outlet. Use for the air path of a fuel cell drive is also possible. In all cases, the integration of the silencer at the air inlet or outlet results in a compact silencer with minimal Increased installation space, in which the air duct described can also be a fitting or connection piece.
Ein zweiter Aspekt der Erfindung betrifft ein Verfahren zum Bereitstellen eines schallge dämpften Luftkanals bzw. ein Herstellungsverfahren. Es weist die Schritte auf gemäß An spruch 9 auf. A second aspect of the invention relates to a method for providing a sound-damped air duct or a manufacturing method. It has the steps according to claim 9.
Dieses Verfahren erlaubt es, insbesondere wenn das Endlosprofil unter Bildung einer kraft schlüssigen Verbindung über den Lufteinlass geschoben wird, einen Luftkanal mit Schall dämpfung besonders einfach bereitzustellen. This method makes it possible, particularly when the endless profile is pushed over the air inlet to form a non-positive connection, to provide an air duct with sound absorption in a particularly simple manner.
Ein weiterer Aspekt betrifft die Verwendung eines mit mindestens einem Steg sowie mit Öff nungen ausgestatten Endlosprofils zur Bildung eines Schalldämpfers an einem Lufteinlass einer Komponente einer Kfz-Heizungs-, Belüftungs- und/oder Klimaanlage oder an einem Lufteinlass einer Komponente eines Luft- oder Abgaspfads eines Verbrennungsmotors. Another aspect relates to the use of an endless profile equipped with at least one web and openings to form a silencer on an air inlet of a component of a motor vehicle heating, ventilation and / or air conditioning system or on an air inlet of a component of an air or exhaust gas path Internal combustion engine.
Nachfolgend soll die Erfindung anhand von Ausführungsbeispielen näher erläutert werden. Die hierzu verwendeten Figuren sind nicht maßstäblich und gleiche Bezugszeichen bezeich nen gleiche Bauteile. Es zeigen: The invention will be explained in more detail below on the basis of exemplary embodiments. The figures used for this purpose are not to scale and the same reference symbols denote the same components. Show it:
Fig. 1 und 2 zylindrisches Endlosprofil; 1 and 2 cylindrical endless profile;
Fig. 1 zeigt einen zylindrischen Luftkanal 5 im axialen Schnitt und Fig. 2 hierzu korrespondie rend denselben Luftkanal 5 mit Blick in Richtung der Zylinderachse Z. Der Luftkanal 5 besitzt ein zylindrisches Endlosprofil 1 , das vier von seiner Innenwand 1 1 radial nach innen abragen de, Stege 2 besitzt. Die Fußpunkte 4 der Stege 2 liegen auf der Außenwand des Lufteinlas ses 14 auf. Zwischen Endlosprofil 1 und Lufteinlass 14 werden dadurch vier Resonatorkam mern 8,8‘,8“,8‘“ gebildet, die jeweils eine Öffnung 3 besitzen, durch die Luft einströmen kann. Zum Schließen der vier Resonatorkammern 8,8‘,8“,8‘“ in axialer Richtung gibt es Trenn wände 30. Bei den Trennwänden handelt es sich, in Axialrichtung gesehen, um kreisringför mige Stege, die radial vom Endlosprofil 1 oder vom Lufteinlass 5 abragen können. Je nach dem, wieviel Resonatorkammern benötigt werden, muss es sich hierbei nicht um einen ge schlossenen Kreisring handeln.
Das Endlosprofil 1 kann auf Länge geschnitten und unter Bildung einer kraftschlüssigen Ver bindung in das Innere eines zylindrischen Lufteinlasses 14 eingeschoben werden. Als Alter native sind Stege wählbar, die bezogen auf die Radialrichtung schräg bzw. unter einem Win kel > 0° hierzu angeordnet sind, bevorzugt unter einem Winkel <45°. Fig. 1 shows a cylindrical air duct 5 in axial section and Fig. 2 this korrespondie rend the same air duct 5 looking in the direction of the cylinder axis Z. The air duct 5 has a cylindrical endless profile 1, the four of its inner wall 11 protrude radially inward de , Webs 2 owns. The base points 4 of the webs 2 lie on the outer wall of the Lufteinlas 14 ses. As a result, four resonator chambers 8, 8 ', 8 ", 8'" are formed between the endless profile 1 and the air inlet 14, each of which has an opening 3 through which air can flow. There are partition walls 30 to close the four resonator chambers 8, 8 ', 8 ", 8'" in the axial direction can query. Depending on how many resonator chambers are required, this need not be a closed circular ring. The endless profile 1 can be cut to length and inserted into the interior of a cylindrical air inlet 14 to form a force-fit connection. As an alternative, webs can be selected which are arranged obliquely with respect to the radial direction or at an angle> 0 ° to this, preferably at an angle <45 °.
Es ist auch denkbar, eine Komponente eines Luft- oder Abgaspfads eines Verbrennungsmo tors, insbesondere eines Turboladereingangs oder - ausgangs oder eines Einlass- oder Aus lasskrümmers oder reiner Luftleitung etc. mit einem derartigen Schalldämpfer auszustatten.
It is also conceivable to equip a component of an air or exhaust gas path of an internal combustion engine, in particular a turbocharger inlet or outlet or an inlet or outlet manifold or a pure air line, etc., with such a silencer.
Bezugszeichenliste List of reference symbols
1 Endlosprofil 1 endless profile
2 Steg 2 bridge
2‘ Steg 2 ‘bridge
2“ Steg 2 "bridge
3 Öffnung 3 opening
4 Fußpunkt 4 base point
4‘ Fußpunkt 4 ‘base point
4" Fußpunkt 4 " base point
5 Luftkanal 5 air duct
6 Außenfläche 6 exterior surface
6‘ Außenfläche 6 ‘outer surface
7 Seiteninnenwald 7 side inner forest
7‘ Seiteninnenwand 7 ‘inner side wall
7“ untere Innenwand 7 "lower inner wall
8 Resonatorkammer 8 resonator chamber
8‘ Resonatorkammer 8 ‘resonator chamber
8“ Resonatorkammer 8 “resonator chamber
9 Aufweitung 9 expansion
10 Krümmungsbereich 10 area of curvature
1 1 Innenwand 1 1 inner wall
12 Schalldämpfer 12 mufflers
13 Ausströmer 13 air vents
14 Lufteinlass 14 air inlet
14‘ Lufteinlass 14 ‘air inlet
15 Lamelle 15 lamella
16 Dichtung 16 seal
17 Rohr 17 pipe
18 Außenwand 18 outer wall
19 Fußlinie 19 foot line
20 Wollvlies 20 wool fleece
21 Zylinderwand 21 cylinder wall
21‘ Zylinderwand
21“ Zylinderwand 30 Trennwand 21 'cylinder wall 21 “cylinder wall 30 partition wall
Z Zylinderachse P Pfeil
Z cylinder axis P arrow
Claims
1 . Luftkanal für ein Kraftfahrzeug mit einem zylindrischen Lufteinlass (14) und einem zylindrischen Endlosprofil (1 ), wobei der Lufteinlass durchgehende Öffnungen (3) aufweist, bei dem das Endlosprofil mindestens einen von seiner Innenwand (1 1 ) nach innen abragenden Steg (2, 2‘, 2“) besitzt, dessen Fußpunkt (4) auf der Außenwand des Lufteinlasses (14) aufliegt und wobei das Endlosprofil (1 ) zusammen mit zumindest einem Teil der Außenwand des Lufteinlasses (14) einen Schalldämpfer (12) mit mindestens einer Resonatorkammer (8, 8‘, 8“) bildet. 1 . Air duct for a motor vehicle with a cylindrical air inlet (14) and a cylindrical endless profile (1), the air inlet having through openings (3) in which the endless profile has at least one web (2, 2) protruding inward from its inner wall (1 1) ', 2 "), the base point (4) of which rests on the outer wall of the air inlet (14) and wherein the endless profile (1) together with at least part of the outer wall of the air inlet (14) has a silencer (12) with at least one resonator chamber ( 8, 8 ', 8 “).
2. Luftkanal nach Anspruch 1 , bei dem zwei vom Lufteinlass (14) und/oder vom Endlosprofil (1 ) radial abragende, kreisringförmige Trennwände (30) vorliegen. 2. Air duct according to claim 1, in which there are two annular partition walls (30) projecting radially from the air inlet (14) and / or from the endless profile (1).
3. Luftkanal nach einem der Ansprüche 1 bis 2, bei dem das Endlosprofil (1) unter Bildung einer kraftschlüssigen Verbindung über den Lufteinlass (14) geschoben ist. 3. Air duct according to one of claims 1 to 2, in which the endless profile (1) is pushed over the air inlet (14) to form a non-positive connection.
4. Luftkanal nach einem der Ansprüche 1 bis 3, bei dem das Endlosprofil (1 ) mit der Außenwand des Lufteinlasses (14) verklebt oder auf diesem aufgespritzt ist. 4. Air duct according to one of claims 1 to 3, in which the endless profile (1) is glued to the outer wall of the air inlet (14) or is sprayed onto it.
5. Luftkanal nach einem der Ansprüche 1 bis 4, bei dem mindestens ein Teil der Resonatorkammern (8, 8‘, 8“) aus einem schallabsorbierenden Material gebildet ist. 5. Air duct according to one of claims 1 to 4, in which at least some of the resonator chambers (8, 8 ‘, 8 ″) are formed from a sound-absorbing material.
6. Luftkanal nach einem der Ansprüche 1 bis 5 als Bestandteil einer Komponente einer Kfz-Heizungs-, Belüftungs- und/oder Klimaanlage, insbesondere eines Ausströmers (13), oder als Bestandteil einer Komponente eines Luft- oder Abgaspfads eines Verbrennungsmotors oder eines Brennstoffzellenantriebs. 6. Air duct according to one of claims 1 to 5 as part of a component of a motor vehicle heating, ventilation and / or air conditioning system, in particular an air outlet (13), or as part of a component of an air or exhaust gas path of an internal combustion engine or a fuel cell drive.
7. Verfahren mit den folgenden Schritten: a) Bereitstellen eines zylindrischen Endlosprofils (1) mit mindestens einem radial nach innen abragenden Steg (2, 2‘, 2“) und eines zylindrischen Lufteinlasses (14), wobei der Lufteinlass durchgehende Öffnungen (3) besitzt.
b) Anordnen des Endlosprofils (1 ) derart, dass das Endlosprofil (1 ) zusammen mit zumindest einem Teil einer Außenwand (18) des Lufteinlasses (14) einen Schalldämpfer (12) mit zumindest einer Resonatorkammer (8, 8‘,8“) mit durchgehenden Öffnungen für eine Luftzufuhr bildet.
7. Method with the following steps: a) Providing a cylindrical endless profile (1) with at least one radially inwardly projecting web (2, 2 ', 2 ") and a cylindrical air inlet (14), the air inlet having through openings (3) owns. b) Arranging the endless profile (1) in such a way that the endless profile (1) together with at least part of an outer wall (18) of the air inlet (14) has a silencer (12) with at least one resonator chamber (8, 8 ', 8 ") through openings for an air supply.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20701691.6A EP3921191A1 (en) | 2019-02-06 | 2020-01-10 | Air channel for a motor vehicle and method for the production thereof |
CN202080012975.XA CN113396073A (en) | 2019-02-06 | 2020-01-10 | Air duct for a motor vehicle and method for producing the same |
Applications Claiming Priority (2)
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DE102019201504.2A DE102019201504A1 (en) | 2019-02-06 | 2019-02-06 | Air duct for a motor vehicle and method for its manufacture |
DE102019201504.2 | 2019-02-06 |
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WO2020160870A1 true WO2020160870A1 (en) | 2020-08-13 |
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Family Applications (1)
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PCT/EP2020/050536 WO2020160870A1 (en) | 2019-02-06 | 2020-01-10 | Air channel for a motor vehicle and method for the production thereof |
Country Status (5)
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EP (1) | EP3921191A1 (en) |
CN (1) | CN113396073A (en) |
DE (1) | DE102019201504A1 (en) |
MA (1) | MA56427A (en) |
WO (1) | WO2020160870A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202023102698U1 (en) | 2023-05-17 | 2023-06-12 | Mahle International Gmbh | air duct |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022101107A1 (en) | 2022-01-18 | 2023-07-20 | Woco Industrietechnik Gmbh | Motor vehicle and air duct for conducting room air into or out of a cabin of a motor vehicle |
CN115217694A (en) * | 2022-04-01 | 2022-10-21 | 长城汽车股份有限公司 | Resonance body, bleed air pipe and vehicle |
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- 2020-01-10 MA MA056427A patent/MA56427A/en unknown
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Also Published As
Publication number | Publication date |
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EP3921191A1 (en) | 2021-12-15 |
CN113396073A (en) | 2021-09-14 |
DE102019201504A1 (en) | 2020-08-06 |
MA56427A (en) | 2022-05-11 |
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