EP1400685B1 - Combined resonator and air filter - Google Patents

Combined resonator and air filter Download PDF

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Publication number
EP1400685B1
EP1400685B1 EP03102669A EP03102669A EP1400685B1 EP 1400685 B1 EP1400685 B1 EP 1400685B1 EP 03102669 A EP03102669 A EP 03102669A EP 03102669 A EP03102669 A EP 03102669A EP 1400685 B1 EP1400685 B1 EP 1400685B1
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EP
European Patent Office
Prior art keywords
air filter
resonator
resonator tube
tube
connection piece
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.)
Expired - Lifetime
Application number
EP03102669A
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German (de)
French (fr)
Other versions
EP1400685A2 (en
EP1400685A3 (en
Inventor
Andreas Graefenstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
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Mann and Hummel GmbH
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Filing date
Publication date
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Publication of EP1400685A2 publication Critical patent/EP1400685A2/en
Publication of EP1400685A3 publication Critical patent/EP1400685A3/en
Application granted granted Critical
Publication of EP1400685B1 publication Critical patent/EP1400685B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/14—Combined air cleaners and silencers
    • 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
    • F02M35/02—Air cleaners
    • F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
    • F02M35/0205—Details, e.g. sensors or measuring devices
    • F02M35/0207—Details, e.g. sensors or measuring devices on the clean air side
    • 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
    • F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
    • 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

Definitions

  • the invention relates to an air filter, in particular an air filter of an internal combustion engine, according to the preamble of claim 1. Furthermore, the invention relates to a modular system with parts for this air filter and a method for producing the above-mentioned air filter.
  • An air filter of the aforementioned type is by the EP 0 894 190 B1 been revealed.
  • a Helmholtz resonator is arranged in the flow path after an air filter element in an air filter housing.
  • the outer wall of the air filter housing forms the outer wall of the resonator chamber.
  • the attachment of the resonator tube is technically difficult to implement, as well as the resonator tube will tend to vibrate.
  • the sound attenuation is based on a rigid, only a small frequency range covering system.
  • the Helmoltzresonator has only one chamber and can not be adapted to different operating conditions.
  • a silencer of the aforementioned type by the DE 199 43 246 A1 been revealed.
  • This silencer is also based on the principle of a Helmholtz resonator.
  • a muffler is proposed which is provided with an inlet, an outlet and a resonator housing arranged therebetween, wherein the resonator housing has a circular cross-section and in the resonator a charge air tube with a plurality of through-going recesses acting as resonance bores, is used.
  • the resonance bores are distributed over the entire circumference of the circular cross section of the charge air pipe.
  • the space between the resonator housing and charge air tube is divided by Segmentiernote into individual resonator chambers.
  • the resonator housing is designed as a casting and resonator housing and charge air tube have a steadily curved shape in the same sense.
  • the disadvantage of an increased space requirement since the charge air tube is completely enclosed by the resonator housing becomes.
  • the production is complicated, complicated and expensive due to the large number of parts and the materials used.
  • the object of the invention is to provide an air filter which has the possibility if necessary to integrate a sound absorber based on the principle of the Helmholtz resonator and thereby to give the possibility of a variation of the frequency range to be damped. Furthermore, this air filter needs a small footprint, compact and simple and economical to manufacture. In addition, the object is to develop a method for producing such a silencer.
  • the invention relates to an air filter with an inlet and an outlet, which is preferably used in internal combustion engines. Between the inlet and outlet sealing an air filter element is arranged, which may consist of non-woven or zig-zag folded paper or other known in the art filter media.
  • the air filter housing is divided into at least two housing parts, which are connected to each other by means of releasable connection means. At least one of the housing parts has an integrated into the geometry of the housing part receiving socket, which can accommodate a perforated resonator tube.
  • This receiving socket is preferably constructed at least partially tubular and preferably has a slightly conical shape. Furthermore, this receiving neck forms at least a part of the outer wall of a resonator silencer.
  • the receiving socket for the resonator tube is arranged in the interior of the air filter housing. Due to the ever-decreasing space in the engine compartments of new cars, this compact design supports the efficient use of the available space.
  • the receiving neck is arranged such that the dimensions of the outer housing of the air filter with respect to an air filter without resonator does not change and also the air filter element can be maintained.
  • a further embodiment of the invention is that the resonator tube is arranged in the clean air side outlet. Furthermore, it is also possible to arrange the resonator tube in the roluftuftschen inlet, the noise reduction is given in both cases and also the effective frequency range remains the same. Here, the arrangement of the filter element in the air filter housing and thereby available internal space plays, whether on the outlet or on the inlet side, a role.
  • the effective for the air passage cross-sectional area, whether from the inlet or outlet, remains the same when inserted into the receiving neck resonator tube. This means that the flow resistance of the air filter with or without Resonatorrohr remains the same. This results in a consistent performance of the air filter even after retrofitting with a Resonatorschalldämpfer.
  • the air filter is characterized in that the resonator tube is made of an injection-moldable material, such as e.g. PA 6.6 exists.
  • an injection-moldable material such as e.g. PA 6.6 exists.
  • partitions are arranged on the resonator tube and sealing lips are arranged on the radial outer diameter of the partitions.
  • sealing lips are arranged on the radial outer diameter of the partitions.
  • a further embodiment of the air filter includes that the resonator tube is disposed non-destructively releasably in the filter housing. This means that the resonator tube can be subsequently inserted into the receiving socket of an air filter housing and connected to it via a detachable connection.
  • the detachable connection is conceivable as a screw connection or clip connection or other types of connection known in the prior art.
  • the embodiment of the resonator tube in conjunction with the receiving socket results in a two-chamber resonator.
  • a substantially annular, surrounding the resonator tube partition arranged with molded in the outer region Dichtlilppen, wherein in the further course of the resonator over the circumference annular recesses are arranged and in the course thereafter then turn a substantially annular Partition is arranged with molded in the outer region sealing lips.
  • this second partition annular recesses are in turn arranged over the circumference, which is completed by a last, the resonator tube surrounding substantially annular partition with molded in the outer region sealing lips.
  • the recesses are freely selectable, but the embodiment is advantageous as an annular recess, as this reduces the tooling costs.
  • the geometry of the recess has no significant influence on the quality of the sound attenuation.
  • the geometry of the partitions with the molded in the outer region of the sealing lip must be adapted to the geometry of the receiving nozzle, so as to realize a sealing delimitation of the chambers to each other and to the outside. This results in two resonator chambers in connection with at least one part of the receiving nozzle, which can cover different frequency ranges due to a different wall thickness of the resonator tube and a different volume of the resonator chamber. As a result, a wider frequency range can be lowered sound-absorbing.
  • the air filter with integrated air filter element can be adapted to various internal combustion engines, characterized in that depending on the requirement profile, a modified resonator tube is used.
  • a modified resonator tube is used. This has the advantage that not to every new engine variant or every new vehicle model a complete new filter housing must be constructed, but it can be covered with a constant air filter housing only on the exchange of Resonatorrohrs different internal combustion engines or engine variants.
  • a modular system for the assembly of an air filter for the intake air of internal combustion engines includes an air filter housing comprising at least two housing parts, wherein at least one housing part has a receiving socket for a resonator tube, a filter element arranged in the housing and a resonator tube designed corresponding to the receiving socket for forming a multi-chamber resonator.
  • This modular system with the matching parts has the advantage of being able to be used in various internal combustion engines with different frequency ranges to be damped.
  • the simple structure also includes a simple exchange of individual air filter components. So z. B. to be adapted to the new requirements for a change in the noise requirement via a change of the resonator tube of the air filter.
  • such a modular system also meets the requirement of economical production and low costs for warehouse logistics.
  • the resonator tube is connected via detachable connection means with the receiving socket.
  • the releasable connection means include z. As a screw or a clip connection or other known in the art connecting means.
  • the inventive method for producing the air filter includes the production of the air filter housing in the injection molding process, wherein at least a part of the walls of the air filter housing forms a receiving socket of a resonator tube.
  • a receiving socket is formed by the tool geometry at the inlet or outlet of the air filter housing, which neither obstructs the air flow nor limits the size of the air filter element to be used in retrospect.
  • the thus manufactured air filter housing is sealingly provided between the inlet and outlet with an air filter element and can then be equipped in the receiving socket with a resonator tube to a resonator silencer if necessary.
  • the air filter thus produced can be used without any restriction either with resonator silencer or without Resonatorschalldämpfer. This provides the advantage of lower cost manufacturing since only one tool needs to be used and lower inventory costs, because not two different air filter housing must be kept in stock.
  • sealing lips are attached to the partitions of the resonator tube, which cause a releasable connection between the air filter housing and resonator tube sealing effect between the resulting resonator and the environment.
  • the resonator tube is also produced by injection molding and so the partitions can be produced directly in the injection molding process.
  • the attached to the radial outer sides of the partition walls sealing lips can be attached there via glued or welded joints.
  • These sealing lips are preferably made of a softer thermoplastic material, e.g. Sanchopren, a thermoplastic elastomer (TPE), to ensure some deformation at a very high degree of sealing.
  • An embodiment of this method is characterized in that the sealing lips are molded onto the partitions of the resonator tube in the 2-component method. This results in an extremely intimate connection between the partition and the sealing lip and the risk of leakage in the area between the sealing lip and the partition wall is thereby minimized, if not excluded.
  • the air filter 10 shows an air filter 10 with an inlet 11 and an outlet 12. Between inlet 11 and outlet 12, an air filter element 13 is sealingly arranged.
  • the air filter 10 consists of two air filter housing parts 14a, 14b, which are sealingly releasably connected to each other.
  • the inlet 11 and the outlet 12, the arrows indicate the direction of flow, each offering the possibility to connect additional lines or components to the air filter housing.
  • the housing walls on the air filter housing part 14b are convexly continued in the region of the outlet 12 into the interior of the air filter 10 and thereby form a receiving socket 15. This means that the passage area, starting from the outer end of the outlet 12 inwardly towards the interior of the air filter 10 increases.
  • the receiving socket 15 has a substantially circular base. This air filter 10 can be used directly in an internal combustion engine in the configuration shown here.
  • FIG. 2 shows a resonator tube 16 intended for receiving in the receiving socket 15.
  • the components corresponding to the preceding figure are provided with the same reference numerals.
  • the resonator tube 16 has a slight curvature in order to be able to follow the contour of the receiving nozzle 15.
  • a plurality of annular recesses 16 are arranged between the partitions 17 over the circumference of the resonator tube 16. The number of recesses 19 and their shape and arrangement have a decisive influence on the frequency range to be damped with the wall thickness of the resonator tube 16.
  • the resonator tube 16 together with the partitions 17, the sealing lips 18 and the recesses 19 can be produced by thermoplastic injection molding. While the resonator tube 16 and the partition walls 17 made of a solid, hard material such. As polyamide 66 (glass fiber reinforced) or similar known in the prior art thermoplastic materials, the sealing lip is made of a soft, elastic material. This is molded onto the partitions 17 in a two-component process.
  • FIG. 3 shows the air filter 10 according to the invention with inserted resonator tube 16.
  • Components corresponding to the preceding figures are provided with the same reference numerals.
  • the resonator tube 16 is integrated into the receiving socket 15.
  • the different diameters of the partitions 17, including the sealing lips 18, result in two resonator chambers which are sealed off from one another and with the interior and the outer region, corresponding to the receiving stub 15 which widens inwards.
  • the effective passage diameter of the outlet 12 does not change despite the resonator tube 16 inserted.
  • the resonator tube 16 can now be connected via a welded joint or a Klipstress not detachably connected to the air filter housing part 14b and the associated receiving socket 15 or releasably sealing in which the inner cutting disc 17 is provided with receiving lugs not shown here and these receiving lugs with the air filter housing part 14b z. B. are screwed.
  • FIG. 4 shows an enlargement of the resonator tube 16 used in the receiving socket 15.
  • the components corresponding to the preceding figures are provided with the same reference numerals.
  • the resulting resonator 20 can be clearly seen.
  • two resonator chambers 20 are sealingly separated from one another, wherein these two chambers are each sealingly closed to the outside.
  • a two-chamber broadband resonator is realized. Due to the flexible design of the sealing lips 18, the seal is still given even with low manufacturing tolerances.
  • the substantially cylindrical embodiment of the resonator tube 16 results in the respective resonator chamber volume with the substantially cylindrical conversion through the receiving nozzle. An enlargement or reduction of this volume also has an influence on the frequencies to be damped.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The air filter has an air filter (13) arranged between an inlet (11) and an outlet (12). A connecting collar (15) for a resonator tube (16) is ranged on the air filter housing (14a,14b). At least part of the connecting collar forms at least part of the external wall of a resonant acoustic damper. Independent claims are included for a modular system for constructing an air filter, and for a method of manufacturing an air filter.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Luftfilter, insbesondere ein Luftfilter einer Brennkraftmaschine, nach der Gattung des Patentanspruchs 1. Außerdem betrifft die Erfindung ein Baukastensystem mit Teilen für diesen Luftfilter und ein Verfahren zur Herstellung des oben genannten Luftfilters.The invention relates to an air filter, in particular an air filter of an internal combustion engine, according to the preamble of claim 1. Furthermore, the invention relates to a modular system with parts for this air filter and a method for producing the above-mentioned air filter.

Ein Luftfilter der vorgenannten Art ist durch die EP 0 894 190 B1 offenbart worden. Dabei wird ein Helmholtzresonator im Strömungsverlauf nach einem Luftfilterelement in einem Luftfiltergehäuse angeordnet. Die Außenwand des Luftfiltergehäuses bildet dabei die Außenwand der Resonatorkammer. Bei dem offenbarten Luftfilter ergeben sich jedoch auch einige Nachteile. Die Anbringung des Resonatorrohres ist technisch schwer zu realisieren, ebenso wird das Resonatorrohr zu Schwingungen neigen. Weiterhin beruht die Schalldämpfung auf einem starren, einen nur geringen Frequenzbereich abdeckenden, System. Der Helmoltzresonator besitzt nur eine Kammer und läßt sich nicht an unterschiedliche Betriebszustände anpassen.An air filter of the aforementioned type is by the EP 0 894 190 B1 been revealed. In this case, a Helmholtz resonator is arranged in the flow path after an air filter element in an air filter housing. The outer wall of the air filter housing forms the outer wall of the resonator chamber. In the disclosed air filter, however, there are also some disadvantages. The attachment of the resonator tube is technically difficult to implement, as well as the resonator tube will tend to vibrate. Furthermore, the sound attenuation is based on a rigid, only a small frequency range covering system. The Helmoltzresonator has only one chamber and can not be adapted to different operating conditions.

Weiterhin ist ein Schalldämpfer der vorgenannten Art durch die DE 199 43 246 A1 offenbart worden. Dieser Schalldämpfer basiert ebenso auf dem Prinzip eines Helmholtz-Resonators. Hierbei wird ein Schalldämpfer vorgeschlagen, welcher mit einem Einlaß, einem Auslaß und einem dazwischen angeordneten Resonatorgehäuse versehen ist, wobei das Resonatorgehäuse einen Kreisquerschnitt aufweist und in dem Resonatorgehäuse ein Ladeluftrohr mit einer Vielzahl durchgehender Ausnehmungen, die als Resonanzbohrungen fungieren, eingesetzt ist. Die Resonanzbohrungen sind über den gesamten Umfang des Kreisquerschnitts des Ladeluftrohrs verteilt. In einer Ausgestaltung der Erfindung wird der Raum zwischen Resonatorgehäuse und Ladeluftrohr durch Segmentierwände in einzelne Resonatorkammern aufgeteilt. Weiterhin ist das Resonatorgehäuse als Gußteil ausgeführt und Resonatorgehäuse und Ladeluftrohr weisen eine in gleichem Sinne stetig gekrümmte Form auf. Hier ergibt sich einerseits der Nachteil eines erhöhten Platzbedarfes, da das Ladeluftrohr komplett von dem Resonatorgehäuse umschlossen wird. Andererseits ist die Fertigung aufgrund der Vielzahl von Teilen und der eingesetzten Materialien aufwendig, kompliziert und teuer. Schließlich offenbart die DE 944 405 B einen Schalldämpfer gemäß dem Oberbegriff der Ansprüche 1, 11 und 12.Furthermore, a silencer of the aforementioned type by the DE 199 43 246 A1 been revealed. This silencer is also based on the principle of a Helmholtz resonator. Here, a muffler is proposed which is provided with an inlet, an outlet and a resonator housing arranged therebetween, wherein the resonator housing has a circular cross-section and in the resonator a charge air tube with a plurality of through-going recesses acting as resonance bores, is used. The resonance bores are distributed over the entire circumference of the circular cross section of the charge air pipe. In one embodiment of the invention, the space between the resonator housing and charge air tube is divided by Segmentierwände into individual resonator chambers. Furthermore, the resonator housing is designed as a casting and resonator housing and charge air tube have a steadily curved shape in the same sense. Here, on the one hand, there is the disadvantage of an increased space requirement, since the charge air tube is completely enclosed by the resonator housing becomes. On the other hand, the production is complicated, complicated and expensive due to the large number of parts and the materials used. Finally, the reveals DE 944 405 B a silencer according to the preamble of claims 1, 11 and 12.

Die Aufgabe der Erfindung ist es, einen Luftfilter zu schaffen welcher die Möglichkeit hat bei Bedarf einen Schalldämper, basierend auf dem Prinzip des Helmholtz-Resonators, zu integrieren und die dadurch die Möglichkeit einer Variation des zu dämpfenden Frequenzbereiches zu geben. Weiterhin soll dieser Luftfilter einen geringen Platzbedarf benötigen, kompakt aufgebaut und einfach und wirtschaftlich herzustellen sein. Zusätzlich besteht die Aufgabe darin, ein Verfahren zur Herstellung eines solchen Schalldämpfers zu entwickeln.The object of the invention is to provide an air filter which has the possibility if necessary to integrate a sound absorber based on the principle of the Helmholtz resonator and thereby to give the possibility of a variation of the frequency range to be damped. Furthermore, this air filter needs a small footprint, compact and simple and economical to manufacture. In addition, the object is to develop a method for producing such a silencer.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung betrifft einen Luftfilter mit einem Einlaß und einem Auslaß, der bevorzugt in Brennkraftmaschinen eingesetzt wird. Zwischen Einlaß und Auslaß ist dichtend ein Luftfilterelement angeordnet, welches aus Vlies oder zick-zack-förmig gefaltetem Papier bestehen kann oder auch aus sonstigen im Stand der Technik bekannte Filtermedien. Das Luftfiltergehäuse ist in wenigstens zwei Gehäuseteile unterteilt, welche mittels lösbaren Verbindungsmitteln miteinander verbunden werden. Wenigstens eines der Gehäuseteile weist einen in die Geometrie des Gehäuseteils integrierten Aufnahmestutzen auf, welcher ein perforiertes Resonatorrohr aufnehmen kann. Dieser Aufnahmestutzen ist bevorzugt zumindest teilweise rohrförmig aufgebaut und hat bevorzugt eine leicht konische Form. Weiterhin bildet dieser Aufnahmestutzen wenigstens einen Teil der Außenwand eines Resonatorschalldämpfers. Dies bedeutet, dass hier zwischen eingeschobenem Resonatorrohr und Aufnahmestutzen wenigstens eine Resonatorkammer gebildet wird. Da dieser Aufnahmestutzen in eines der Luftfiltergehäuseteile integriert ist und dadurch keinen zusätzlichen Herstellungs- oder Montageaufwand beinhaltet, ergibt sich hieraus ein großer wirtschaftlicher und montagetechnischer Vorteil gegenüber dem bisherigen Stand der Technik. Da sich, trotz des Aufnahmestutzens, der wirksame Querschnittt des Auslaßes nicht ändert, ergeben sich auch keinerlei Nachteile im möglichen Luftvolumenstrom und dadurch auch in dem Leistungsvermögen des Luftfilters. Aufgrund dieser Tatsache läßt sich der Luftfilter mit oder ohne Resonatorrohr betreiben, um an verschiedene Brennkraftmaschinen angepaßt zu werden, bei welchen unterschiedliche Anforderungen an die Geräuschentwicklungen gestellt werden. Die Anzahl der Einlaß- und Auslaßöffnungen am Luftfiltergehäuse hat dabei keinen Einfluß auf die Auslegung des Aufnahmestutzens.The invention relates to an air filter with an inlet and an outlet, which is preferably used in internal combustion engines. Between the inlet and outlet sealing an air filter element is arranged, which may consist of non-woven or zig-zag folded paper or other known in the art filter media. The air filter housing is divided into at least two housing parts, which are connected to each other by means of releasable connection means. At least one of the housing parts has an integrated into the geometry of the housing part receiving socket, which can accommodate a perforated resonator tube. This receiving socket is preferably constructed at least partially tubular and preferably has a slightly conical shape. Furthermore, this receiving neck forms at least a part of the outer wall of a resonator silencer. This means that at least one resonator chamber is formed here between inserted resonator tube and receiving socket. Since this receiving socket is integrated into one of the air filter housing parts and thus does not involve any additional manufacturing or assembly costs, this results in a great economic and montage technical advantage over the prior art. Since, despite the receiving nozzle, the effective Querschnittst the outlet does not change, there are no disadvantages in the possible air flow rate and thereby also in the performance of the air filter. Due to this fact, the air filter can be operated with or without Resonatorrohr to be adapted to different internal combustion engines, where different requirements are placed on the noise developments. The number of inlet and outlet openings on the air filter housing has no effect on the interpretation of the receiving nozzle.

Bei einer vorteilhaften Ausgestaltung der Erfindung ist der Aufnahmestutzen für das Resonatorrohr im Inneren des Luftfiltergehäuses angeordnet. Aufgrund des immer geringer werdenden Raumes in Motorräumen von neuen Pkw unterstützt diese kompakte Bauform eine effiziente Ausnutzung des zur Verfügung stehenden Raumes. In dem erfindungsgemäßen Luftfilter ist der Aufnahmestutzen derart angeordnet, dass sich die Dimensionen des Außengehäuses des Luftfilters gegenüber einem Luftfilter ohne Resonator nicht ändern und auch das Luftfilterelement beibehalten werden kann.In an advantageous embodiment of the invention, the receiving socket for the resonator tube is arranged in the interior of the air filter housing. Due to the ever-decreasing space in the engine compartments of new cars, this compact design supports the efficient use of the available space. In the air filter according to the invention, the receiving neck is arranged such that the dimensions of the outer housing of the air filter with respect to an air filter without resonator does not change and also the air filter element can be maintained.

Eine weitere Ausgestaltung der Erfindung besteht darin, dass das Resonatorrohr im reinluftseitigen Auslaß angeordnet ist. Weiterhin ist es auch möglich, dass Resonatorrohr im rohluftseitigen Einlaß anzuordnen, die Geräuschdämmung ist in beiden Fällen gegeben und auch der wirksame Frequenzbereich bleibt gleich. Hier spielt die Anordnung des Filterelements im Luftfiltergehäuse und der dadurch zur Verfügung stehende innere Bauraum, sei es auf Auslaß- oder auf Einlaßseite, eine Rolle.A further embodiment of the invention is that the resonator tube is arranged in the clean air side outlet. Furthermore, it is also possible to arrange the resonator tube in the roluftuftseitigen inlet, the noise reduction is given in both cases and also the effective frequency range remains the same. Here, the arrangement of the filter element in the air filter housing and thereby available internal space plays, whether on the outlet or on the inlet side, a role.

Gemäß einer weiteren Ausgestaltung des Luftfilters bleibt die für den Luftdurchgang wirksame Querschnittsfläche, sei es von Einlaß oder Auslaß, bei in den Aufnahmestutzen eingesetztem Resonatorrohr gleich. Dies bedeutet, dass der Strömungswiderstand vom Luftfilter mit oder ohne Resonatorrohr gleich bleibt. Daraus ergibt sich ein gleichbleibendes Leistungsvermögen des Luftfilters auch nach der Nachrüstung mit einem Resonatorschalldämpfer.According to a further embodiment of the air filter, the effective for the air passage cross-sectional area, whether from the inlet or outlet, remains the same when inserted into the receiving neck resonator tube. This means that the flow resistance of the air filter with or without Resonatorrohr remains the same. This results in a consistent performance of the air filter even after retrofitting with a Resonatorschalldämpfer.

In einer weiteren vorteilhaften Ausgestaltung ist der Luftfilter dadurch gekennzeichnet, dass das Resonatorrohr aus einem spritzgießfähigen Material, wie z.B. PA 6.6, besteht. Hieraus ergibt sich eine leichte und wirtschaftliche Fertigung des Resonatorrohrs ebenso wie ein im Sinne der Altautoverordnung recyclingfähiger Luftfilter inklusive Resonatorschalldämpfer, sofern beide aus einem spritzgießfähigen, thermoplastischen Material bestehen.In a further advantageous embodiment, the air filter is characterized in that the resonator tube is made of an injection-moldable material, such as e.g. PA 6.6 exists. This results in a simple and economical production of the resonator tube as well as a recyclable air filter according to the end-of-life regulations, including resonator silencers, provided that both consist of an injection-moldable, thermoplastic material.

Gemäß einer weiteren Ausgestaltung des Resonatorrohrs aus einem spritzgießfähigen, thermoplastischen Material sind am Resonatorrohr Trennwände und am radialen Außendurchmesser der Trennwände Dichtlippen angeordnet. Mittels dieser Trennwände und der außen angeordneten Dichtlippen werden im Aufnahmestutzen verschiedene Resonatorkammern dichtend voneinander abgetrennt. Des weiteren dienen die Trennwände zur Abdichtung der Resonatorkammern nach außen bzw. nach innen in den Bauraum des Filtergehäuses hinein. Dementsprechend sind die Trennwände mit samt der Dichtlippen an die innere Form des Aufnahmestutzens angepaßt, um dort die Abdichtung herstellen zu können. Die flexiblen Dichtlippen sind im 2-Komponenten-Verfahren an die festen Trennwände angespritzt.According to a further embodiment of the resonator tube made of an injection-moldable, thermoplastic material, partitions are arranged on the resonator tube and sealing lips are arranged on the radial outer diameter of the partitions. By means of these partitions and the outside arranged sealing lips different resonator chambers are sealingly separated from each other in the receiving socket. Furthermore, the dividing walls serve to seal the resonator chambers outwards or inwards into the installation space of the filter housing. Accordingly, the partitions are together with the sealing lips adapted to the inner shape of the receiving nozzle to establish the seal there to be able to. The flexible sealing lips are molded onto the solid partitions in a 2-component process.

Eine weitere Ausgestaltung des Luftfilters beinhaltet, dass das Resonatorrohr zerstörungsfrei lösbar in dem Filtergehäuse angeordnet ist. Dies bedeutet, dass das Resonatorrohr nachträglich in den Aufnahmestutzen eines Luftfiltergehäuses eingesetzt werden kann und über eine lösbare Verbindung mit diesem verbunden wird. Die lösbare Verbindung ist denkbar als Schraubverbindung oder Klipsverbindung oder sonstige im Stand der Technik bekannten Verbindungsarten.A further embodiment of the air filter includes that the resonator tube is disposed non-destructively releasably in the filter housing. This means that the resonator tube can be subsequently inserted into the receiving socket of an air filter housing and connected to it via a detachable connection. The detachable connection is conceivable as a screw connection or clip connection or other types of connection known in the prior art.

In einer weiteren vorteilhaften Ausgestaltung des Luftfilters ergibt die Ausgestaltung des Resonatorrohres in Verbindung mit dem Aufnahmestutzen einen Zweikammer-Resonator. Dazu ist am Resonatorrohr an einem axialen Ende eine im wesentlichen kreisringförmige, das Resonatorrohr umgebende Trennwand mit im äußeren Bereich angespritzten Dichtlilppen angeordnet, wobei im weiteren Verlauf des Resonatorrohres über den Umfang kreisringförmige Aussparungen angeordnet sind und wobei im weiteren Verlauf hierauf anschließend wiederum eine im wesentlichen kreisringförmige Trennwand mit im äußeren Bereich angespritzten Dichtlippen angeordnet ist. Im axialen Verlauf nach dieser zweiten Trennwand sind wiederum über den Umfang kreisringförmige Aussparungen angeordnet, welche von einer letzen, das Resonatorrohr umgebenden im wesentlichen kreisringförmigen Trennwand mit im äußeren Bereich angespritzen Dichtlippen abgeschlossen wird. Hierbei sind jedoch die Aussparungen frei wählbar, vorteilhaft ist die Ausgestaltung jedoch als kreisringförmige Aussparung, da sich hierdurch die Werkzeugkosten verringern. Die Geometrie der Aussparung hat jedoch keinen wesentlichen Einfluß auf die Qualität der Schalldämpfung. Die Geometrie der Trennwände mit der im äußeren Bereich angespritzten Dichtlippe muß der Geometrie des Aufnahmestutzens angepaßt sein, um so eine dichtende Abgrenzung der Kammern zueinander und jeweils nach außen zu verwirklichen. Hier ergeben sich also zwei Resonatorkammern in Verbindung mit wenigstens einem Teil des Aufnahmestutzens, welche durch eine unterschiedliche Wandstärke des Resonatorrohrs und ein unterschiedliches Volumen der Resonatorkammer verschiedene Frequenzbereiche abdecken kann. Dadurch läßt sich ein breiterer Frequenzbereich schalldämmend absenken.In a further advantageous embodiment of the air filter, the embodiment of the resonator tube in conjunction with the receiving socket results in a two-chamber resonator. For this purpose, on the resonator tube at an axial end a substantially annular, surrounding the resonator tube partition arranged with molded in the outer region Dichtlilppen, wherein in the further course of the resonator over the circumference annular recesses are arranged and in the course thereafter then turn a substantially annular Partition is arranged with molded in the outer region sealing lips. In the axial course after this second partition annular recesses are in turn arranged over the circumference, which is completed by a last, the resonator tube surrounding substantially annular partition with molded in the outer region sealing lips. In this case, however, the recesses are freely selectable, but the embodiment is advantageous as an annular recess, as this reduces the tooling costs. However, the geometry of the recess has no significant influence on the quality of the sound attenuation. The geometry of the partitions with the molded in the outer region of the sealing lip must be adapted to the geometry of the receiving nozzle, so as to realize a sealing delimitation of the chambers to each other and to the outside. This results in two resonator chambers in connection with at least one part of the receiving nozzle, which can cover different frequency ranges due to a different wall thickness of the resonator tube and a different volume of the resonator chamber. As a result, a wider frequency range can be lowered sound-absorbing.

In einer weiteren Ausgestaltung der Erfindung läßt sich der Luftfilter mit integriertem Luftfilterelement an verschiedene Brennkraftmaschinen adaptieren, dadurch dass je nach Anforderungsprofil ein geändertes Resonatorrohr eingesetzt wird. Dieses birgt den Vorteil, dass nicht zu jeder neuen Motorvariante oder jedem neuen Fahrzeugmodel ein komplett neues Filtergehäuse konstruiert werden muß, sondern es können bei einem gleichbleibenden Luftfiltergehäuse nur über den Austausch des Resonatorrohrs verschiedene Brennkraftmaschinen bzw. Motorvarianten abgedeckt werden.In a further embodiment of the invention, the air filter with integrated air filter element can be adapted to various internal combustion engines, characterized in that depending on the requirement profile, a modified resonator tube is used. This has the advantage that not to every new engine variant or every new vehicle model a complete new filter housing must be constructed, but it can be covered with a constant air filter housing only on the exchange of Resonatorrohrs different internal combustion engines or engine variants.

Gemäß Anspruch 12 wird ein Baukastensystem für den Zusammenbau eines Luftfilters für die Ansaugluft von Brennkraftmaschinen vorgeschlagen. Dieses Baukastensystem enthält ein Luftfiltergehäuse bestehend aus wenigstens zwei Gehäuseeinzelteilen, wobei wenigstens ein Gehäuseteil einen Aufnahmestutzen für ein Resonatorrohr aufweist, ein in dem Gehäuse angeordnetes Filterelement und ein korrespondierend zum Aufnahmestutzen ausgelegtes Resonatorrohr zur Ausbildung eines Mehrkammerresonators. Dieses Baukastensystem mit den zueinander passenden Teilen hat den Vorteil, in verschiedenen Brennkraftmaschinen mit verschiedenen zu dämpfenden Frequenzbereichen eingesetzt werden zu können. Der einfache Aufbau beinhaltet weiterhin ein einfaches Tauschen einzelner Luftfilterkomponenten. So kann z. B. bei einer Änderung der Geräuschanforderung über einen Wechsel des Resonatorrohres der Luftfilter an die neuen Forderungen angepaßt werden. Zusätzlich entspricht ein solches Baukastensystem auch der Forderung einer wirtschaftlichen Fertigung und eines geringen Aufwandes für eine Lagerlogistik.According to claim 12, a modular system for the assembly of an air filter for the intake air of internal combustion engines is proposed. This modular system includes an air filter housing comprising at least two housing parts, wherein at least one housing part has a receiving socket for a resonator tube, a filter element arranged in the housing and a resonator tube designed corresponding to the receiving socket for forming a multi-chamber resonator. This modular system with the matching parts has the advantage of being able to be used in various internal combustion engines with different frequency ranges to be damped. The simple structure also includes a simple exchange of individual air filter components. So z. B. to be adapted to the new requirements for a change in the noise requirement via a change of the resonator tube of the air filter. In addition, such a modular system also meets the requirement of economical production and low costs for warehouse logistics.

In einer Ausgestaltung des Baukastensystems ist das Resonatorrohr über lösbare Verbindungsmittel mit dem Aufnahmestutzen verbunden. Die lösbaren Verbindungsmittel beinhalten z. B. eine Schraubverbindung oder eine Klipsverbindung oder sonstige im Stand der Technik bekannte Verbindungsmittel.In one embodiment of the modular system, the resonator tube is connected via detachable connection means with the receiving socket. The releasable connection means include z. As a screw or a clip connection or other known in the art connecting means.

Das erfindungsgemäße Verfahren zur Herstellung des Luftfilters beinhaltet die Herstellung des Luftfiltergehäuses im Spritzgießprozeß, wobei wenigstens ein Teil der Wandungen des Luftfiltergehäuses einen Aufnahmestutzen eines Resonatorrohres bildet. Hierbei wird durch die Werkzeuggeometrie am Einlaß oder Auslaß des Luftfiltergehäuses ein Aufnahmestutzen gebildet, welcher weder die Luftströmung behindert noch die Größe des im Nachhinein einzusetzenden Luftfilterelementes einschränkt. Das so gefertigte Luftfiltergehäuse wird dichtend zwischen Einlaß und Auslaß mit einem Luftfilterelement versehen und kann bei Bedarf dann im Aufnahmestutzen mit einem Resonatorrohr zu einem Resonatorschalldämpfer ausgerüstet werden. Der so hergestellte Luftfilter kann ohne jegliche Einschränkung entweder mit Resonatorschalldämpfer oder ohne Resonatorschalldämpfer eingesetzt werden. Dies ergibt den Vorteil einer kostengünstigeren Fertigung, da nur ein Werkzeug verwendet werden muss, und geringeren Lagerhaltungskosten, da nicht zwei verschiedenen Luftfiltergehäuse auf Lager vorgehalten werden müssen.The inventive method for producing the air filter includes the production of the air filter housing in the injection molding process, wherein at least a part of the walls of the air filter housing forms a receiving socket of a resonator tube. Here, a receiving socket is formed by the tool geometry at the inlet or outlet of the air filter housing, which neither obstructs the air flow nor limits the size of the air filter element to be used in retrospect. The thus manufactured air filter housing is sealingly provided between the inlet and outlet with an air filter element and can then be equipped in the receiving socket with a resonator tube to a resonator silencer if necessary. The air filter thus produced can be used without any restriction either with resonator silencer or without Resonatorschalldämpfer. This provides the advantage of lower cost manufacturing since only one tool needs to be used and lower inventory costs, because not two different air filter housing must be kept in stock.

Eine vorteilhafte Ausgestaltung des Verfahrens zur Herstellung des Luftfilters insbesondere einer Brennkraftmaschine ist dadurch gegeben, dass an die Trennwände des Resonatorrohres Dichtlippen angefügt werden, welche bei der lösbaren Verbindung von Luftfiltergehäuse und Resonatorrohr eine dichtende Wirkung zwischen den so entstehenden Resonatorkammern und zur Umgebung bewirken. Das Resonatorrohr wird auch im Spritzgießverfahren hergestellt und so können die Trennwände direkt im Spritzgießvorgang mit hergestellt werden. Die an den radialen Außenseiten der Trennwände angebrachten Dichtlippen können dort über Kleb- oder Schweißverbindungen angebracht werden. Diese Dichtlippen bestehen bevorzugt aus einem weicheren thermoplastischen Material wie z.B. Sanchopren, einem thermoplastischen Elastomer (TPE), um gewisse Verformungen bei sehr hohem Abdichtungsgrad zu gewährleisten.An advantageous embodiment of the method for producing the air filter, in particular an internal combustion engine is given by the fact that sealing lips are attached to the partitions of the resonator tube, which cause a releasable connection between the air filter housing and resonator tube sealing effect between the resulting resonator and the environment. The resonator tube is also produced by injection molding and so the partitions can be produced directly in the injection molding process. The attached to the radial outer sides of the partition walls sealing lips can be attached there via glued or welded joints. These sealing lips are preferably made of a softer thermoplastic material, e.g. Sanchopren, a thermoplastic elastomer (TPE), to ensure some deformation at a very high degree of sealing.

Eine Ausgestaltung dieses Verfahrens ist dadurch gekennzeichnet, dass die Dichtlippen an den Trennwänden des Resonatorrohrs im 2-Komponenten-Verfahren angespritzt werden. Dadurch ergibt sich eine äußerst innige Verbindung zwischen Trennwand und Dichtlippe und die Gefahr einer Undichtigkeit im Bereich zwischen Dichtlippe und Trennwand wird dadurch minimiert, wenn nicht sogar ausgeschlossen.An embodiment of this method is characterized in that the sealing lips are molded onto the partitions of the resonator tube in the 2-component method. This results in an extremely intimate connection between the partition and the sealing lip and the risk of leakage in the area between the sealing lip and the partition wall is thereby minimized, if not excluded.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred embodiments of the invention will become apparent from the claims and from the description and the drawings, wherein the individual features are realized individually or in each case in the form of sub-combinations in the embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigt

Figur 1
eine schematische Ansicht des erfindungsgemäßen Luftfilters ohne Resonatorrohr,
Figur 2
eine schematische Ansicht des Resonatorrohres,
Figur 3
eine schematische Ansicht des erfindungsgemäßen Luftfilters mit Resonatorrohr und
Figur 4
ein relevanter Ausschnitt des Resonatorrohres in eingebautem Zustand.
Further details of the invention are described in the drawing with reference to schematic embodiments. This shows
FIG. 1
a schematic view of the air filter according to the invention without resonator tube,
FIG. 2
a schematic view of the resonator tube,
FIG. 3
a schematic view of the air filter according to the invention with resonator tube and
FIG. 4
a relevant section of the resonator tube in the installed state.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die Figur 1 zeigt einen Luftfilter 10 mit einem Einlaß 11 und einem Auslaß 12. Zwischen Einlaß 11 und Auslaß 12 ist dichtend ein Luftfilterelement 13 angeordnet. Der Luftfilter 10 besteht aus zwei Luftfiltergehäuseteilen 14a, 14b, welche dichtend lösbar miteinander verbunden sind. Der Einlaß 11 und der Auslaß 12, die Pfeile geben die Strömungsrichtung an, bieten jeweils die Möglichkeit, weitere Leitungen bzw. Bauteile am Luftfiltergehäuse anzuschließen. Die Gehäusewandungen am Luftfiltergehäuseteil 14b werden im Bereich des Auslasses 12 konvex in den Innenraum des Luftfilters 10 weitergeführt und bilden dadurch einen Aufnahmestutzen 15. Dies bedeutet, dass sich die Durchgangsfläche ausgehend vom äußeren Ende des Auslasses 12 nach innen in Richtung Innenraum des Luftfilters 10 vergrößert. Der Aufnahmestutzen 15 weist eine im wesentlichen kreisförmige Grundfläche auf. Dieser Luftfilter 10 ist in der hier dargestellten Konfiguration direkt in einer Brennkraftmaschine einsetzbar.1 shows an air filter 10 with an inlet 11 and an outlet 12. Between inlet 11 and outlet 12, an air filter element 13 is sealingly arranged. The air filter 10 consists of two air filter housing parts 14a, 14b, which are sealingly releasably connected to each other. The inlet 11 and the outlet 12, the arrows indicate the direction of flow, each offering the possibility to connect additional lines or components to the air filter housing. The housing walls on the air filter housing part 14b are convexly continued in the region of the outlet 12 into the interior of the air filter 10 and thereby form a receiving socket 15. This means that the passage area, starting from the outer end of the outlet 12 inwardly towards the interior of the air filter 10 increases. The receiving socket 15 has a substantially circular base. This air filter 10 can be used directly in an internal combustion engine in the configuration shown here.

Die Figur 2 zeigt ein für die Aufnahme im Aufnahmestutzen 15 gedachtes Resonatorrohr 16. Der vorhergehenden Figur entsprechende Bauteile sind mit den gleichen Bezugszeichen versehen. Das Resonatorrohr 16 weist eine geringfügige Krümmung auf, um der Kontur des Aufnahmestutzens 15 folgen zu können. Am Resonatorrohr 16 sind Trennwände 17 angeordnet, welche im äußeren radialen Bereich Dichtlilppen 18 aufweisen. Ebenso sind zwischen den Trennwänden 17 über den Umfang des Resonatorrohrs 16 mehrere kreisringförmige Aussparungen angeordnet. Die Anzahl der Aussparungen 19 und deren Form und Anordnung haben mit der Wandstärke des Resonatorrohres 16 einen entscheidenden Einfluß auf den zu dämpfenden Frequenzbereich. Das Resonatorrohr 16 mitsamt den Trennwänden 17, den Dichtlippen 18 und den Aussparungen 19 kann im thermoplastischen Spritzgießverfahren hergestellt werden. Während das Resonatorrohr 16 und die Trennwände 17 aus einem festen, hartem Material wie z. B. Polyamid 66 (glasfaserverstärkt) oder ähnlichen im Stand der Technik bekannten thermoplastischen Kunststoffmaterialien hergestellt wird, besteht die Dichtlippe aus einem weichen, elastischen Material. Diese wird im 2-Komponenten-Verfahren an die Trennwände 17 angespritzt.FIG. 2 shows a resonator tube 16 intended for receiving in the receiving socket 15. The components corresponding to the preceding figure are provided with the same reference numerals. The resonator tube 16 has a slight curvature in order to be able to follow the contour of the receiving nozzle 15. On the resonator tube 16 dividing walls 17 are arranged, which have Dichtlilppen 18 in the outer radial region. Likewise, a plurality of annular recesses 16 are arranged between the partitions 17 over the circumference of the resonator tube 16. The number of recesses 19 and their shape and arrangement have a decisive influence on the frequency range to be damped with the wall thickness of the resonator tube 16. The resonator tube 16 together with the partitions 17, the sealing lips 18 and the recesses 19 can be produced by thermoplastic injection molding. While the resonator tube 16 and the partition walls 17 made of a solid, hard material such. As polyamide 66 (glass fiber reinforced) or similar known in the prior art thermoplastic materials, the sealing lip is made of a soft, elastic material. This is molded onto the partitions 17 in a two-component process.

Die Figur 3 zeigt den erfindungsgemäßen Luftfilter 10 mit eingesetztem Resonatorrohr 16. Den vorhergehenden Figuren entsprechende Bauteile sind mit den gleichen Bezugszeichen versehen. Hier ist deutlich zu erkennen, auf welche Weise das Resonatorrohr 16 in den Aufnahmestutzen 15 integriert wird. Die unterschiedlichen Durchmesser der Trennwände 17 inklusive der Dichtlippen 18 ergeben korrespondierend mit dem nach innen hin sich aufweitenden Aufnahmestutzen 15 zwei voneinander und mit dem Innenraum und dem äußeren Bereich abgedichtete Resonatorkammern. Hier ist deutlich zu erkennen, dass sich bei einer passenden Auslegung des Resonatorrohrs 16 der wirksame Durchgangsdurchmesser des Auslasses 12 trotz eingesetztem Resonatorrohr 16 nicht verändert. Das Resonatorrohr 16 kann nun über eine Schweißverbindung oder eine Klipsverbindung nicht lösbar mit dem Luftfiltergehäuseteil 14b und dem damit verbundenen Aufnahmestutzen 15 verbunden werden oder lösbar dichtend in dem die innere Trennscheibe 17 mit hier nicht dargestellten Aufnahmelaschen versehen wird und diese Aufnahmelaschen mit dem Luftfiltergehäuseteil 14b z. B. verschraubt werden.FIG. 3 shows the air filter 10 according to the invention with inserted resonator tube 16. Components corresponding to the preceding figures are provided with the same reference numerals. Here it can be clearly seen, in which way the resonator tube 16 is integrated into the receiving socket 15. The different diameters of the partitions 17, including the sealing lips 18, result in two resonator chambers which are sealed off from one another and with the interior and the outer region, corresponding to the receiving stub 15 which widens inwards. Here it can be clearly seen that, with a suitable design of the resonator tube 16, the effective passage diameter of the outlet 12 does not change despite the resonator tube 16 inserted. The resonator tube 16 can now be connected via a welded joint or a Klipsverbindung not detachably connected to the air filter housing part 14b and the associated receiving socket 15 or releasably sealing in which the inner cutting disc 17 is provided with receiving lugs not shown here and these receiving lugs with the air filter housing part 14b z. B. are screwed.

Die Figur 4 zeigt eine Vergrößerung des eingesetzten Resonatorrohres 16 im Aufnahmestutzen 15. Den vorhergehenden Figuren entsprechende Bauteile sind mit den gleichen Bezugszeichen versehen. In Figur 4 sind deutlich die entstehenden Resonatorkammern 20 zu erkennen. Im dargestellten Beispiel sind zwei Resonatorkammern 20 dichtend voneinander getrennt, wobei diese beiden Kammern auch jeweils nach außen dichtend verschlossen sind. Durch diese Maßnahme wird ein Zweikammer-Breitbandresonator realisiert. Durch die flexible Gestaltung der Dichtlippen 18 ist die Abdichtung auch bei geringen Fertigungstoleranzen weiterhin gegeben. Die im wesentlichen zylindrische Ausführungsform des Resonatorrohres 16 ergibt mit der in wesentlichen zylindrischen Umwandung durch den Aufnahmestutzen das jeweilige Resonatorkammervolumen. Eine Vergrößerung oder Verkleinerung dieses Volumens hat ebenfalls einen Einfluß auf die zu dämpfenden Frequenzen.FIG. 4 shows an enlargement of the resonator tube 16 used in the receiving socket 15. The components corresponding to the preceding figures are provided with the same reference numerals. In Figure 4, the resulting resonator 20 can be clearly seen. In the example shown, two resonator chambers 20 are sealingly separated from one another, wherein these two chambers are each sealingly closed to the outside. By this measure, a two-chamber broadband resonator is realized. Due to the flexible design of the sealing lips 18, the seal is still given even with low manufacturing tolerances. The substantially cylindrical embodiment of the resonator tube 16 results in the respective resonator chamber volume with the substantially cylindrical conversion through the receiving nozzle. An enlargement or reduction of this volume also has an influence on the frequencies to be damped.

Claims (13)

  1. Air filter, more especially of an internal combustion engine, the said air filter including an inlet (11), an outlet (12), an air filter element (13) that is disposed in a sealing manner between inlet (11) and outlet (12), and a resonator, wherein a resonator tube (16) is disposed in a receiving connection piece (15) that is disposed on the air filter housing (14a, 14b), wherein at least one part of the receiving connection piece (15) of the air filter housing (14a, 14b) forms at least one part of the outer wall of a resonator silencer and at least one resonator chamber (20) is formed between the receiving connection piece (15) and the resonator tube (16), characterised in that the resonator tube (16) includes, at one axial end, a substantially ring-shaped partition wall (17) that surrounds the resonator tube (16) and has sealing lips (18) that are injection moulded on in the outer region, wherein, as the resonator tube (16) extends further, circular recesses (19) are disposed over the circumference, wherein, as the resonator tube (16) extends further, there is disposed an additional, substantially ring-shaped partition wall (17) that surrounds the resonator tube (16) and has sealing lips (18) that are injection moulded on in the outer region, wherein, following this, there is disposed an additional region that is sealingly closed by the second partition wall (17) and has substantially circular recesses (19) disposed over the circumference and wherein the resonator tube (16), at its other end, includes a final, substantially ring-shaped partition wall (17) that surrounds the resonator tube (16) and has sealing lips (18) that have been injection moulded on in the outer region.
  2. Air filter (10) according to claim 1, characterised in that the receiving connection piece for the resonator tube (16) is disposed in the interior of the air filter housing (14a, 14b).
  3. Air filter (10) according to one of claims 1 to 2, characterised in that the resonator tube (16) is disposed in the outlet (12) on the filtered side.
  4. Air filter (10) according to one of claims 1 to 2, characterised in that the resonator tube (16) is disposed in the inlet (11) on the unfiltered side.
  5. Air filter (10) according to one of claims 3 or 4, characterised in that the effective cross-sectional area of inlet (11) or outlet (12) remains the same when the resonator tube (16) is inserted.
  6. Air filter (10) according to one of the preceding claims, characterised in that the resonator tube (16) is produced from a material that can be injection moulded.
  7. Air filter (10) according to claim 6, characterised in that the resonator tube (16) includes partition walls (17) and, on the radial outside diameter of the partition walls (17), sealing lips (18).
  8. Air filter (10) according to one of the preceding claims, characterised in that the resonator tube (16) is disposed so as to be detachable in a non destructive manner in the air filter housing (14a, 14b).
  9. Air filter (10) according to claim 8, characterised in that the regions of the resonator tube (16), in a sealing, corresponding connection with at least one part of the receiving connection piece (15), form two resonator chambers to form one broadband resonator.
  10. Air filter (10) according to one of the preceding claims, characterised in that with the air filter housing (14a, 14b) remaining the same when the resonator tube (16) is replaced, it is possible to adapt to different internal combustion engines.
  11. Modular system for the assembly of an air filter (10) for the intake air of internal combustion engines, wherein the module system includes the following elements:
    - an air filter housing (14a, 14b), comprising at least two individual housing parts, wherein at least one housing part includes a receiving connection piece (15) for the receiving of a resonator tube (16) in the receiving connection piece,
    - a filter element (13) that is disposed in the housing,
    - a resonator tube (16) that is designed corresponding to the receiving connection piece (15), it being possible to insert the said resonator tube into the receiving connection piece (15) to form a multi-chamber resonator between the resonator tube and the receiving connection piece, wherein different frequencies can be damped by means of a variation in the resonator tube,
    characterised in that the resonator tube (16) is connected to the receiving connection piece (15) by means of detachable connection means.
  12. Method for producing an air filter (10), more especially of an internal combustion engine, the said air filter including an inlet (11), an outlet (12) and an air filter element that is disposed in a sealing manner between inlet (11) and outlet (12), wherein at least one part of the walls of the air filter housing forms a receiving connection piece for a resonator tube (16), characterised in that a resonator tube (16) is inserted into the receiving connection piece (15) and the air filter is provided in this manner with a resonator silencer, sealing lips (18) being added to partition walls (17) of the resonator tube (16), the said sealing lips, when the air filter housing (14a, 14b) and the resonator tube (16) are connected in a detachable manner, producing a sealing effect between the resonator chambers (2) that are created in such a manner and the surroundings.
  13. Method according to claim 12, characterised in that the said sealing lips (18) are injection moulded onto the partition walls (17) of the resonator tube (16) using the two-component method.
EP03102669A 2002-09-21 2003-08-28 Combined resonator and air filter Expired - Lifetime EP1400685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10243883A DE10243883A1 (en) 2002-09-21 2002-09-21 Resonatorluftfilter
DE10243883 2002-09-21

Publications (3)

Publication Number Publication Date
EP1400685A2 EP1400685A2 (en) 2004-03-24
EP1400685A3 EP1400685A3 (en) 2005-06-29
EP1400685B1 true EP1400685B1 (en) 2007-07-04

Family

ID=31896263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03102669A Expired - Lifetime EP1400685B1 (en) 2002-09-21 2003-08-28 Combined resonator and air filter

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EP (1) EP1400685B1 (en)
AT (1) ATE366357T1 (en)
DE (2) DE10243883A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009037056A1 (en) * 2009-08-13 2011-02-17 Poroson Gmbh Air filter, particularly for intake system of internal combustion engine, comprises housing forming cavity, which has filter material, and sound proofing unit, which has perforated wall
DE102010015541A1 (en) 2010-04-20 2011-10-20 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Air cleaner with resonator built into the air outlet
DE102010038634A1 (en) 2010-07-29 2012-02-02 Poroson Gmbh Air filter for suction system of internal combustion engine of vehicle, has sound damping device comprising circumferential wall within which sound damping element is arranged, where sound damping element runs in axis direction of wall
CN102644531B (en) * 2011-02-16 2015-02-25 曼·胡默尔有限公司 Resonant system
ES2717778T3 (en) * 2014-10-21 2019-06-25 Henn Gmbh & Co Kg Vehicle silencer for a charge air line of an internal combustion engine
CN107100769B (en) * 2017-06-27 2020-05-08 奇瑞汽车股份有限公司 Air filter structure for automobile
FR3069892A1 (en) * 2017-08-03 2019-02-08 Psa Automobiles Sa IMPROVED AIR FILTER FOR A THERMAL ENGINE INTAKE LINE
DE102019210078A1 (en) * 2019-07-09 2021-01-14 Mahle International Gmbh Air filter module
CN113107724B (en) * 2021-04-30 2022-09-16 东风汽车集团股份有限公司 Air filter structure of air inlet system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944405C (en) * 1952-02-10 1956-06-14 Mann & Hummel Filter Oil bath air filter and noise suppressor
DE3429633A1 (en) * 1984-08-11 1986-02-20 Ing. Walter Hengst GmbH & Co KG, 4400 Münster Sound-absorbing air intake filter for an internal combustion engine
IT208247Z2 (en) * 1986-10-17 1988-04-22 Gilardini Spa AIR INTAKE GROUP FOR INDUSTRIAL VEHICLES
DE9113807U1 (en) * 1991-11-06 1991-12-19 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg Air filter for an internal combustion engine
DE4438556A1 (en) * 1994-10-28 1996-05-02 Mann & Hummel Filter Filters, in particular for filtering the intake air of an internal combustion engine
US6530984B2 (en) * 2000-05-19 2003-03-11 Siemens Vdo Automotive Inc. Air cleaner resonator mounting system and cover

Also Published As

Publication number Publication date
DE10243883A1 (en) 2004-04-15
EP1400685A2 (en) 2004-03-24
EP1400685A3 (en) 2005-06-29
ATE366357T1 (en) 2007-07-15
DE50307607D1 (en) 2007-08-16

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