EP2138700B1 - Air filter and fresh air intake system equipped therewith - Google Patents

Air filter and fresh air intake system equipped therewith Download PDF

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Publication number
EP2138700B1
EP2138700B1 EP20090162269 EP09162269A EP2138700B1 EP 2138700 B1 EP2138700 B1 EP 2138700B1 EP 20090162269 EP20090162269 EP 20090162269 EP 09162269 A EP09162269 A EP 09162269A EP 2138700 B1 EP2138700 B1 EP 2138700B1
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EP
European Patent Office
Prior art keywords
housing
loudspeaker
air filter
microphone
membrane
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.)
Not-in-force
Application number
EP20090162269
Other languages
German (de)
French (fr)
Other versions
EP2138700A2 (en
EP2138700A3 (en
Inventor
Thomas Zirkelbach
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2138700A2 publication Critical patent/EP2138700A2/en
Publication of EP2138700A3 publication Critical patent/EP2138700A3/en
Application granted granted Critical
Publication of EP2138700B1 publication Critical patent/EP2138700B1/en
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Anticipated expiration legal-status Critical

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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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • 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
    • F02M35/0202—Manufacturing or assembling; Materials for air cleaner housings
    • 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
    • F02M35/0209—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof comprising flexible, resilient, movable or rotatable elements, e.g. with vibrating or contracting movements; Springs; Valves; Flaps
    • 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
    • F02M35/024—Air cleaners using filters, e.g. moistened
    • 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
    • F02M35/1244—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound
    • F02M35/125—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound by using active elements, e.g. speakers
    • 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

Definitions

  • the present invention relates to an air filter for a fresh air system of an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1.
  • the invention also relates to an equipped with such an air filter fresh air system of an internal combustion engine, especially in a motor vehicle.
  • the air filter for a fresh air system of a vehicle arranged in an internal combustion engine is known.
  • the air filter has a filter housing, which has two housing shells made of plastic.
  • a filter element is arranged so that it separates a clean room from a crude space.
  • one of the housing shells on a membrane which is made separately and is glued to the housing shell.
  • the membrane is used for passive sound modulation, for example, to reduce an intake noise of the internal combustion engine or to change this in a certain way.
  • a fresh air system for an internal combustion engine which is equipped with an active sound modulation device.
  • the sound modulation device comprises a loudspeaker, a microphone and a control unit which is connected on the input side to the microphone and on the output side to the loudspeaker.
  • the sound modulation device further comprises a device housing, in which the speaker is arranged with its own speaker housing, and allows active sound damping by means of anti-sound.
  • the known fresh air system also includes an air filter with a filter housing and a filter element arranged therein. In this case, the air filter with its filter housing and the sound modulation device with its device housing are arranged in a main housing.
  • the present invention is concerned with the problem of providing for an air filter of the type mentioned or for a fresh air system equipped with an improved embodiment, which is characterized in particular by the fact that it has a relatively high degree of integration, it has a relatively compact structure and in particular is inexpensive to produce.
  • the invention is based on the general idea of equipping the air filter with a loudspeaker, which may for example be part of a sound modulation device.
  • the loudspeaker has a loudspeaker diaphragm which can be actuated by an electromagnetic actuator.
  • the speaker diaphragm is injection molded integrally with one of the housing shells, while a speaker housing is mounted on said housing shell.
  • the structural summary of the air filter with a loudspeaker gives the air filter additional functionality.
  • it can be used for an active sound modulation device. Since the speaker diaphragm is injection molded integrally with one of the housing shells of the filter housing, the manufacturing cost is reduced, while at the same time a compact design can be realized.
  • the actuator may comprise an electromagnetic coil which cooperates with a soft-magnetic armature secured to the loudspeaker diaphragm.
  • the loudspeaker diaphragm may have an armature receptacle integrally molded therewith for fixing the armature.
  • the degree of integration can be further increased according to an advantageous embodiment, if at least one of the housing shells is injection-molded integrally with a microphone holder, with the aid of a microphone on the respective housing shell can be fixed.
  • at least one of the housing shells may be injection molded integrally with a housing part of a microphone.
  • Such a microphone can in particular form part of a sound modulation device.
  • FIG. 1 is an internal combustion engine 1, which is arranged in particular in a motor vehicle not shown here, the input side to a fresh air system 2 and the output connected to an exhaust system 3.
  • the fresh air system 2 may comprise an air filter 4 in the usual way.
  • a sound modulation device 5 may be provided. This includes, for example, a control unit 6, at least one loudspeaker 7 and at least one microphone 8.
  • the speaker 7 is attached to a housing 9 of the air filter 4, in which a filter element 10 is arranged.
  • the microphone 8 and the control unit 6 are attached to the filter housing 9.
  • the sound modulation device 5 works with anti-sound and can realize in particular an active sound attenuation. Likewise, a desired sound can be specifically generated with the aid of the sound modulation device 5, so-called sound design.
  • the filter housing 9 has at least two injection-molded housing shells 11, 12 made of plastic. These are fastened to each other in a conventional manner, for example via complementary flanges 13 and suitable fastening elements 14. At least one filter element 10 is arranged in the filter housing 9. This separates in the filter housing 9 a clean room 15 from a raw space 16.
  • the housing 9 has an inlet port 17, via which according to an arrow 18 unfiltered air enters the crude space 16.
  • the housing 9 has an outlet port 19, via the filtered according to an arrow 20 filtered air from the clean room 15 exits.
  • the filter element 10 can be traversed in the usual way of air, being impermeable to contamination of the air.
  • the speaker 7 and the air filter 4 form an integral unit.
  • This is a Speaker housing 21 attached to the filter housing 9.
  • the loudspeaker 7 has a loudspeaker diaphragm 22 and an electromagnetic actuator 23 for actuating the diaphragm 22.
  • the actuator 23 is arranged in the loudspeaker housing 21.
  • the membrane 22 is connected to one of the housing shells 11, 12 here with the designated 12, in the Fig. 2 to 4 each illustrated lower housing shell 12 integrally injection molded.
  • the loudspeaker diaphragm 22 thus forms together with the corresponding housing shell 12 a one-piece integral component.
  • the speaker housing 21 is attached to the housing shell 12 which has the speaker membrane 22 integrally.
  • the loudspeaker diaphragm 22 forms a bottom or at least a wall section of the respective housing shell 12.
  • the loudspeaker diaphragm 22 is preferably positioned within the filter housing 9 in such a way that it delimits the bluff chamber 16.
  • the speaker diaphragm 22 may also be arranged so as to limit the clean room 15.
  • the raw-side arrangement has the advantage that a damping effect of the filter element 10 can be used for coming from the internal combustion engine 1 noise.
  • the housing shell 12 and the Lautscherermembram 22 may be made of the same plastic.
  • a corresponding shape and / or a corresponding wall thickness can the desired mobility realize the speaker diaphragm 22, while the housing shell 12, moreover, has the required strength. In particular, this allows the housing shell 12 to be produced with the loudspeaker membrane 22 with the injection molding technique with one shot.
  • the housing shell 12 and the loudspeaker diaphragm 22 by means of two-shot technique, wherein in a first shot the one component and in a later second shot the other component are injected, this can be done in the same tool or performed in different tools .
  • Different types of plastics can also be used in the two-copy technique, so that it is possible, in particular, to choose a plastic with a higher rigidity for the housing shell 12 and to choose a plastic with a higher elasticity for the loudspeaker diaphragm 22.
  • the actuator 23 preferably has at least one electromagnetic coil 24, which is fixed by means of a corresponding coil receptacle 25 on the speaker housing 21.
  • the actuator 23 also includes a soft magnetic armature 26, which is fixed to the membrane 22 with a suitable anchor receptacle 27.
  • the anchor receptacle 27 is integrally injection molded with the speaker diaphragm 22.
  • the anchor receptacle 27 may also be glued or welded to the membrane 22.
  • a double arrow 28 symbolizes the vibration excitation of the diaphragm 22 by the actuator 23.
  • the speaker housing 21 may, for example, be welded to the respective housing shell 12. Likewise, a bond can be provided. Alternatively, detachable connecting elements, not shown here, can also be provided, with the aid of which the loudspeaker housing 21 is fastened to the respective housing shell 12. This may in particular be in the clip elements or the like. A corresponding attachment zone is designated 29 in the figures.
  • Fig. 2 to 4 show that for the air filter 4 basically any designs can be realized.
  • plate-shaped filter elements 10 are used.
  • ring-shaped filter elements 10 can also be used.
  • Corresponding Fig. 4 may be attached to one of the housing shells 11, 12, a microphone 8.
  • the microphone 8 is attached to the housing shell 12, which is made integral with the membrane 22. It is also possible to grow the microphone 8 on the other housing shell 11.
  • several microphones 8 may be provided.
  • a control unit 6 can be attached to one of the housing shells 11, 12. In the example, the control unit 6 is attached to the other housing shell 11. Likewise, the control unit 6 can be attached to the equipped with the membrane 22 housing shell 12.
  • the respective housing shell 11, 12 may be injection molded integrally with a housing part 30 of the microphone 8.
  • the housing shell 11, 12 forms in the example a bottom and a lateral enclosure of a microphone housing, which is closable with a separate cover 31.
  • the microphone 8 comprises a sound sensor 32, which is connected via a signal line 33 to the control unit 6.
  • FIG. 5b The embodiment shown differs from that in FIG Fig. 5a shown embodiment in that the housing shell 11, 12 includes an opening 34 through which the sound sensor 32 - depending on the arrangement of the microphone 8 - communicating with the raw space 16 or with the clean room 15 of the filter housing 9 communicating.
  • a microphone holder 35 is integrally formed on the respective housing shell 11, 12.
  • the microphone 8 can be used.
  • the microphone holder 35 serve as an integrated microphone housing which can be closed with a corresponding cover.
  • an opening 34 may be provided here as well.
  • Fig. 5d shows an embodiment, which differs from the in Fig. 5c shown embodiment differs in that the receptacle 35 is bordered by a collar 36 which can be used to fix the lid 31.
  • Fig. 5e shows a variant in which the microphone 8 is arranged in the interior of the filter housing 9, wherein in particular the lid 31 is mounted from the inside.
  • control device 6 can also be integrated at least partially structurally into the filter housing 9 in a manner corresponding to the microphone 8.
  • a controller housing 37 may be injection molded integrally with one of the housing shells 11, 12 and receive the actual controller 38.
  • the control unit 6 is connected via a control line 39 to the actuator 23.
  • the lines 33, 39 shown here externally may in an advantageous embodiment also run directly on or in the housing shells 11, 12. Likewise, the lines 33, 39 may be routed within the housing 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Description

Die vorliegende Erfindung betrifft ein Luftfilter für eine Frischluftanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, mit den Merkmalen des Oberbegriffs des Anspruchs 1. Die Erfindung betrifft außerdem eine mit einem derartigen Luftfilter ausgestattete Frischluftanlage einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug.The present invention relates to an air filter for a fresh air system of an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1. The invention also relates to an equipped with such an air filter fresh air system of an internal combustion engine, especially in a motor vehicle.

Aus der WO 01/16477 A1 ist ein Luftfilter für eine Frischluftanlage einer in einem Fahrzeug angeordneten Brennkraftmaschine bekannt. Das Luftfilter besitzt ein Filtergehäuse, das zwei aus Kunststoff hergestellte Gehäuseschalen aufweist. Im Filtergehäuse ist ein Filterelement so angeordnet, dass es einen Reinraum von einem Rohraum trennt. Beim bekannten Luftfilter weist eine der Gehäuseschalen eine Membran auf, die separat hergestellt ist und mit der Gehäuseschale verklebt ist. Die Membran dient dabei zur passiven Schallmodulation, beispielsweise um ein Ansauggeräusch der Brennkraftmaschine zu reduzieren bzw. um dieses in einer bestimmten Weise zu verändern.From the WO 01/16477 A1 an air filter for a fresh air system of a vehicle arranged in an internal combustion engine is known. The air filter has a filter housing, which has two housing shells made of plastic. In the filter housing a filter element is arranged so that it separates a clean room from a crude space. In the known air filter, one of the housing shells on a membrane which is made separately and is glued to the housing shell. The membrane is used for passive sound modulation, for example, to reduce an intake noise of the internal combustion engine or to change this in a certain way.

Aus der EP 1 111 228 A2 ist ein weiteres Luftfilter bekannt, bei dem eine Membran integral mit einer Gehäuseschale hergestellt ist. Auch diese Membran wird passiv zu Schwingungen angeregt, um eine gezielte Soundmodulation zu ermöglichen.From the EP 1 111 228 A2 Another air filter is known in which a membrane is made integral with a housing shell. This membrane is also passively excited to vibrate to allow a targeted sound modulation.

Aus der US 2001/0049999 A1 ist eine Frischluftanlage für eine Brennkraftmaschine bekannt, die mit einer aktive Schallmodulationseinrichtung ausgestattet ist. Die Schallmodulationseinrichtung umfasst einen Lautsprecher, ein Mikrofon sowie ein Steuergerät, das eingangsseitig an das Mikrofon und ausgangsseitig an den Lautsprecher angeschlossen ist. Die Schallmodulationseinrichtung umfasst ferner ein Einrichtungsgehäuse, in dem der Lautsprecher mit einem eigenen Lautsprechergehäuse angeordnet ist, und ermöglicht eine aktive Schalldämpfung mittels Antischall. Die bekannte Frischluftanlage umfasst außerdem ein Luftfilter mit einem Filtergehäuse und einem darin angeordneten Filterelement. Dabei sind in einem Hauptgehäuse das Luftfilter mit seinem Filtergehäuse und die Schallmodulationseinrichtung mit ihrem Einrichtungsgehäuse angeordnet.From the US 2001/0049999 A1 a fresh air system for an internal combustion engine is known, which is equipped with an active sound modulation device. The sound modulation device comprises a loudspeaker, a microphone and a control unit which is connected on the input side to the microphone and on the output side to the loudspeaker. The sound modulation device further comprises a device housing, in which the speaker is arranged with its own speaker housing, and allows active sound damping by means of anti-sound. The known fresh air system also includes an air filter with a filter housing and a filter element arranged therein. In this case, the air filter with its filter housing and the sound modulation device with its device housing are arranged in a main housing.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für ein Luftfilter der eingangs genannten Art bzw. für eine damit ausgestattete Frischluftanlage eine verbesserte Ausführungsform anzugeben, die sich insbesondere dadurch auszeichnet, dass sie einen relativ hohen Integrationsgrad aufweist, dabei einen relativ kompakten Aufbau besitzt und insbesondere preiswert herstellbar ist.The present invention is concerned with the problem of providing for an air filter of the type mentioned or for a fresh air system equipped with an improved embodiment, which is characterized in particular by the fact that it has a relatively high degree of integration, it has a relatively compact structure and in particular is inexpensive to produce.

Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, das Luftfilter mit einem Lautsprecher auszustatten, der beispielsweise ein Bestandteil einer Schallmodulationseinrichtung sein kann. Der Lautsprecher besitzt eine Lautsprechermembran, die mit einem elektromagnetischen Aktuator betätigbar ist. Beim erfindungsgemäßen Luftfilter ist die Lautsprechermembran integral mit einer der Gehäuseschalen spritzgeformt, während ein Lautsprechergehäuse an besagte Gehäuseschale angebaut ist.The invention is based on the general idea of equipping the air filter with a loudspeaker, which may for example be part of a sound modulation device. The loudspeaker has a loudspeaker diaphragm which can be actuated by an electromagnetic actuator. In the air filter according to the invention, the speaker diaphragm is injection molded integrally with one of the housing shells, while a speaker housing is mounted on said housing shell.

Durch die bauliche Zusammenfassung des Luftfilters mit einem Lautsprecher erhält das Luftfilter eine zusätzliche Funktionalität. Insbesondere kann es für eine aktive Schallmodulationseinrichtung verwendet werden. Da die Lautsprechermembran integral mit einer der Gehäuseschalen des Filtergehäuses spritzgeformt ist, reduziert sich der Herstellungsaufwand, wobei gleichzeitig eine kompakte Bauweise realisierbar ist.The structural summary of the air filter with a loudspeaker gives the air filter additional functionality. In particular, it can be used for an active sound modulation device. Since the speaker diaphragm is injection molded integrally with one of the housing shells of the filter housing, the manufacturing cost is reduced, while at the same time a compact design can be realized.

Für die Betätigung der Lautsprechermembran kann der Aktuator eine elektromagnetische Spule aufweisen, die mit einem an der Lautsprechermembran befestigten weichmagnetischen Anker zusammenwirkt. Entsprechend einer vorteilhaften Ausführungsform kann die Lautsprechermembran eine damit integral spritzgeformte Ankeraufnahme zum Festlegen des Ankers aufweisen. Hierdurch wird der Integrationsgrad weiter erhöht, was die Herstellungskosten senkt.For the actuation of the loudspeaker diaphragm, the actuator may comprise an electromagnetic coil which cooperates with a soft-magnetic armature secured to the loudspeaker diaphragm. According to an advantageous embodiment, the loudspeaker diaphragm may have an armature receptacle integrally molded therewith for fixing the armature. As a result, the degree of integration is further increased, which reduces the manufacturing cost.

Der Integrationsgrad lässt sich entsprechend einer vorteilhaften Ausführungsform weiter steigern, wenn zumindest eine der Gehäuseschalen integral mit einer Mikrofonaufnahme spritzgeformt ist, mit deren Hilfe ein Mikrofon an der jeweiligen Gehäuseschale festlegbar ist. Alternativ kann zumindest eine der Gehäuseschalen integral mit einem Gehäuseteil eines Mikrofons spritzgeformt sein. Ein derartiges Mikrofon kann insbesondere ein Bestandteil einer Schallmodulationseinrichtung bilden.The degree of integration can be further increased according to an advantageous embodiment, if at least one of the housing shells is injection-molded integrally with a microphone holder, with the aid of a microphone on the respective housing shell can be fixed. Alternatively, at least one of the housing shells may be injection molded integrally with a housing part of a microphone. Such a microphone can in particular form part of a sound modulation device.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Es zeigen, jeweils schematisch,

Fig. 1
eine stark vereinfachte, schaltplanartige Prinzipdarstellung einer Brennkraftmaschine mit einer Frischluftanlage,
Fig. 2
eine stark vereinfachte Prinzipdarstellung eines Luftfilters im Längsschnitt,
Fig. 3
eine Ansicht wie in Fig. 2, jedoch bei einer anderen Ausführungsform,
Fig. 4
eine Ansicht wie in den Fig. 2 und 3, jedoch bei einer weiteren Ausführungsform,
Fig. 5a bis 5e
stark vereinfachte, prinzipielle Schnittansichten eines Filtergehäuses im Bereich eines Mikrofons bzw. im Bereich eines Steuergeräts.
Show, in each case schematically,
Fig. 1
a greatly simplified, schematics-like schematic diagram of an internal combustion engine with a fresh air system,
Fig. 2
a simplified schematic representation of an air filter in longitudinal section,
Fig. 3
a view like in Fig. 2 but in another embodiment,
Fig. 4
a view like in the Fig. 2 and 3 but in another embodiment,
Fig. 5a to 5e
greatly simplified, principal sectional views of a filter housing in the area of a microphone or in the area of a control unit.

Entsprechend Fig. 1 ist eine Brennkraftmaschine 1, die insbesondere in einem hier nicht dargestellten Kraftfahrzeug angeordnet ist, eingangsseitig an eine Frischluftanlage 2 und ausgangsseitig an eine Abgasanlage 3 angeschlossen. Die Frischluftanlage 2 kann in üblicher Weise ein Luftfilter 4 aufweisen. Außerdem kann eine Schallmodulationseinrichtung 5 vorgesehen sein. Diese umfasst beispielsweise ein Steuergerät 6, zumindest einen Lautsprecher 7 und zumindest ein Mikrofon 8.Corresponding Fig. 1 is an internal combustion engine 1, which is arranged in particular in a motor vehicle not shown here, the input side to a fresh air system 2 and the output connected to an exhaust system 3. The fresh air system 2 may comprise an air filter 4 in the usual way. In addition, a sound modulation device 5 may be provided. This includes, for example, a control unit 6, at least one loudspeaker 7 and at least one microphone 8.

Der Lautsprecher 7 ist an ein Gehäuse 9 des Luftfilters 4 angebaut, in dem ein Filterelement 10 angeordnet ist. Im gezeigten Beispiel sind auch das Mikrofon 8 und das Steuergerät 6 an das Filtergehäuse 9 angebaut.The speaker 7 is attached to a housing 9 of the air filter 4, in which a filter element 10 is arranged. In the example shown, the microphone 8 and the control unit 6 are attached to the filter housing 9.

Die Schallmodulationseinrichtung 5 arbeitet mit Antischall und kann insbesondere eine aktive Schalldämpfung realisieren. Ebenso lässt sich mit Hilfe der Schallmodulationseinrichtung 5 gezielt ein gewünschter Sound generieren, sogenanntes Sounddesign.The sound modulation device 5 works with anti-sound and can realize in particular an active sound attenuation. Likewise, a desired sound can be specifically generated with the aid of the sound modulation device 5, so-called sound design.

Entsprechend den Fig. 2 bis 4 weist das Filtergehäuse 9 zumindest zwei aus Kunststoff spritzgeformte Gehäuseschalen 11, 12 auf. Diese sind in üblicher Weise aneinander befestigt, beispielsweise über komplementäre Flansche 13 und geeignete Befestigungselemente 14. Im Filtergehäuse 9 ist zumindest ein Filterelement 10 angeordnet. Dieses trennt im Filtergehäuse 9 einen Reinraum 15 von einem Rohraum 16. Das Gehäuse 9 weist einen Einlassanschluss 17 auf, über den entsprechend einem Pfeil 18 ungefilterte Luft in den Rohraum 16 eintritt. Außerdem weist das Gehäuse 9 einen Auslassanschluss 19 auf, über den entsprechend einem Pfeil 20 gefilterte Luft aus dem Reinraum 15 austritt. Hierzu ist das Filterelement 10 in üblicher Weise von Luft durchströmbar, wobei es für Verunreinigungen der Luft undurchlässig ist.According to the Fig. 2 to 4 For example, the filter housing 9 has at least two injection-molded housing shells 11, 12 made of plastic. These are fastened to each other in a conventional manner, for example via complementary flanges 13 and suitable fastening elements 14. At least one filter element 10 is arranged in the filter housing 9. This separates in the filter housing 9 a clean room 15 from a raw space 16. The housing 9 has an inlet port 17, via which according to an arrow 18 unfiltered air enters the crude space 16. In addition, the housing 9 has an outlet port 19, via the filtered according to an arrow 20 filtered air from the clean room 15 exits. For this purpose, the filter element 10 can be traversed in the usual way of air, being impermeable to contamination of the air.

Entsprechend den Fig. 2 bis 4 bilden der Lautsprecher 7 und das Luftfilter 4 eine integrale Einheit. Hierzu ist ein Lautsprechergehäuse 21 an das Filtergehäuse 9 angebaut. Der Lautsprecher 7 besitzt eine Lautsprechermembran 22 und einen elektromagnetischen Aktuator 23 zur Betätigung der Membran 22. Der Aktuator 23 ist dabei im Lautsprechergehäuse 21 angeordnet. Die Membran 22 ist mit einer der Gehäuseschalen 11, 12 hier mit der mit 12 bezeichneten, in den Fig. 2 bis 4 jeweils unten dargestellten unteren Gehäuseschale 12 integral spritzgeformt. Die Lautsprechermembran 22 bildet somit zusammen mit der entsprechenden Gehäuseschale 12 ein einstückiges integrales Bauteil. Das Lautsprechergehäuse 21 ist an diejenige Gehäuseschale 12 angebaut, das die Lautsprechermembran 22 integral aufweist.According to the Fig. 2 to 4 the speaker 7 and the air filter 4 form an integral unit. This is a Speaker housing 21 attached to the filter housing 9. The loudspeaker 7 has a loudspeaker diaphragm 22 and an electromagnetic actuator 23 for actuating the diaphragm 22. The actuator 23 is arranged in the loudspeaker housing 21. The membrane 22 is connected to one of the housing shells 11, 12 here with the designated 12, in the Fig. 2 to 4 each illustrated lower housing shell 12 integrally injection molded. The loudspeaker diaphragm 22 thus forms together with the corresponding housing shell 12 a one-piece integral component. The speaker housing 21 is attached to the housing shell 12 which has the speaker membrane 22 integrally.

Die Lautsprechermembran 22 bildet einen Boden oder zumindest einen Wandabschnitt der jeweiligen Gehäuseschale 12. Bevorzugt ist die Lautsprechermembran 22 innerhalb des Filtergehäuses 9 so positioniert, dass sie den Rohraum 16 begrenzt. Alternativ kann die Lautsprechermembran 22 auch so angeordnet sein, dass sie den Reinraum 15 begrenzt. Die rohseitige Anordnung hat den Vorteil, dass eine Dämpfungswirkung des Filterelements 10 für von der Brennkraftmaschine 1 kommende Geräusche genutzt werden kann.The loudspeaker diaphragm 22 forms a bottom or at least a wall section of the respective housing shell 12. The loudspeaker diaphragm 22 is preferably positioned within the filter housing 9 in such a way that it delimits the bluff chamber 16. Alternatively, the speaker diaphragm 22 may also be arranged so as to limit the clean room 15. The raw-side arrangement has the advantage that a damping effect of the filter element 10 can be used for coming from the internal combustion engine 1 noise.

Für die Herstellung der integralen Einheit aus Gehäuseschale 12 mit Lautsprechermembran 22 gibt es unterschiedliche Möglichkeiten. Grundsätzlich können die Gehäuseschale 12 und die Lautsprechermembram 22 aus dem gleichen Kunststoff hergestellt sein. Eine entsprechende Formgebung und/oder eine entsprechende Wandstärke kann die gewünschte Beweglichkeit der Lautsprechermembran 22 realisieren, während gleichzeitig die Gehäuseschale 12 im übrigen die erforderliche Festigkeit besitzt. Insbesondere lassen sich dadurch die Gehäuseschale 12 mit der Lautsprechermembran 22 mit der Spritzgusstechnik mit einem Schuss herstellen. Alternativ ist es ebenso möglich, die Gehäuseschale 12 und die Lautsprechermembran 22 mittels Zweischusstechnik herzustellen, wobei in einem ersten Schuss das eine Bauteil und in einem späteren zweiten Schuss das andere Bauteil gespritzt werden, wobei dies im gleichen Werkzeug erfolgen kann oder in unterschiedlichen Werkzeugen durchgeführt wird. Bei der Zweischusstechnik können insbesondere auch unterschiedliche Kunststoffe verwendet werden, so dass es insbesondere möglich ist, für die Gehäuseschale 12 einen Kunststoff mit höherer Steifigkeit zu wählen und für die Lautsprechermembran 22 einen Kunststoff mit höherer Elastizität zu wählen.For the production of the integral unit of housing shell 12 with loudspeaker diaphragm 22, there are different possibilities. Basically, the housing shell 12 and the Lautsprecherermembram 22 may be made of the same plastic. A corresponding shape and / or a corresponding wall thickness can the desired mobility realize the speaker diaphragm 22, while the housing shell 12, moreover, has the required strength. In particular, this allows the housing shell 12 to be produced with the loudspeaker membrane 22 with the injection molding technique with one shot. Alternatively, it is also possible to produce the housing shell 12 and the loudspeaker diaphragm 22 by means of two-shot technique, wherein in a first shot the one component and in a later second shot the other component are injected, this can be done in the same tool or performed in different tools , Different types of plastics can also be used in the two-copy technique, so that it is possible, in particular, to choose a plastic with a higher rigidity for the housing shell 12 and to choose a plastic with a higher elasticity for the loudspeaker diaphragm 22.

Der Aktuator 23 weist vorzugsweise zumindest eine elektromagnetische Spule 24 auf, die mit Hilfe einer entsprechenden Spulenaufnahme 25 am Lautsprechergehäuse 21 festgelegt ist. Der Aktuator 23 umfasst außerdem einen weichmagnetischen Anker 26, der mit einer geeigneten Ankeraufnahme 27 an der Membran 22 festgelegt ist. Bevorzugt ist die Ankeraufnahme 27 dabei mit der Lautsprechermembran 22 integral spritzgeformt. Alternativ kann die Ankeraufnahme 27 auch an die Membran 22 angeklebt oder angeschweißt sein. Ein Doppelpfeil 28 symbolisiert die Schwingungsanregung der Membran 22 durch den Aktuator 23.The actuator 23 preferably has at least one electromagnetic coil 24, which is fixed by means of a corresponding coil receptacle 25 on the speaker housing 21. The actuator 23 also includes a soft magnetic armature 26, which is fixed to the membrane 22 with a suitable anchor receptacle 27. Preferably, the anchor receptacle 27 is integrally injection molded with the speaker diaphragm 22. Alternatively, the anchor receptacle 27 may also be glued or welded to the membrane 22. A double arrow 28 symbolizes the vibration excitation of the diaphragm 22 by the actuator 23.

Das Lautsprechergehäuse 21 kann beispielsweise an die jeweilige Gehäuseschale 12 angeschweißt sein. Ebenso kann eine Verklebung vorgesehen sein. Alternativ können auch hier nicht gezeigte lösbare Verbindungselemente vorgesehen sein, mit deren Hilfe das Lautsprechergehäuse 21 an der jeweiligen Gehäuseschale 12 befestigt ist. Hierbei kann es sich insbesondere im Clipselemente oder dergleichen handeln. Eine entsprechende Befestigungszone ist in den Fig. mit 29 bezeichnet.The speaker housing 21 may, for example, be welded to the respective housing shell 12. Likewise, a bond can be provided. Alternatively, detachable connecting elements, not shown here, can also be provided, with the aid of which the loudspeaker housing 21 is fastened to the respective housing shell 12. This may in particular be in the clip elements or the like. A corresponding attachment zone is designated 29 in the figures.

Die Fig. 2 bis 4 zeigen, dass für das Luftfilter 4 grundsätzlich beliebige Bauformen realisierbar sind. In den Beispielen werden beispielsweise plattenförmige Filterelemente 10 verwendet. Ebenso können auch ringkörperartige Filterelemente 10 zur Anwendung kommen.The Fig. 2 to 4 show that for the air filter 4 basically any designs can be realized. In the examples, for example, plate-shaped filter elements 10 are used. Likewise, ring-shaped filter elements 10 can also be used.

Entsprechend Fig. 4 kann an eine der Gehäuseschalen 11, 12 ein Mikrofon 8 angebaut sein. Im Beispiel ist das Mirkofon 8 an diejenige Gehäuseschale 12 angebaut, die integral mit der Membran 22 hergestellt ist. Ebenso ist es möglich, das Mikrofon 8 an der anderen Gehäuseschale 11 anzubauen. Des weiteren können auch mehrere Mikrofone 8 vorgesehen sein. Zusätzlich oder alternativ kann an eine der Gehäuseschalen 11, 12 ein Steuergerät 6 angebaut sein. Im Beispiel ist das Steuergerät 6 an die andere Gehäuseschale 11 angebaut. Ebenso kann das Steuergerät 6 an die mit der Membran 22 ausgestattete Gehäuseschale 12 angebaut sein.Corresponding Fig. 4 may be attached to one of the housing shells 11, 12, a microphone 8. In the example, the microphone 8 is attached to the housing shell 12, which is made integral with the membrane 22. It is also possible to grow the microphone 8 on the other housing shell 11. Furthermore, several microphones 8 may be provided. Additionally or alternatively, a control unit 6 can be attached to one of the housing shells 11, 12. In the example, the control unit 6 is attached to the other housing shell 11. Likewise, the control unit 6 can be attached to the equipped with the membrane 22 housing shell 12.

In den Fig. 5a bis 5e werden unterschiedliche Anbaumöglichkeiten bzw. Integrationsmöglichkeiten für ein Mikrofon 8 exemplarisch erläutert. Diese lassen sich auch analog für das Steuergerät 6 anwenden.In the Fig. 5a to 5e different attachment options or integration options for a microphone 8 are exemplified. These can also be used analogously for the control unit 6.

Entsprechend Fig. 5a kann die jeweilige Gehäuseschale 11, 12 integral mit einem Gehäuseteil 30 des Mikrofons 8 spritzgeformt sein. Die Gehäuseschale 11, 12 bildet im Beispiel einen Boden und eine seitliche Einfassung eines Mikrofongehäuses, das mit einem separaten Deckel 31 verschließbar ist. Das Mikrofon 8 umfasst einen Schallsensor 32, der über eine Signalleitung 33 an das Steuergerät 6 angeschlossen ist.Corresponding Fig. 5a For example, the respective housing shell 11, 12 may be injection molded integrally with a housing part 30 of the microphone 8. The housing shell 11, 12 forms in the example a bottom and a lateral enclosure of a microphone housing, which is closable with a separate cover 31. The microphone 8 comprises a sound sensor 32, which is connected via a signal line 33 to the control unit 6.

Die in Fig. 5b gezeigte Ausführungsform unterscheidet sich von der in Fig. 5a gezeigten Ausführungsform dadurch, dass die Gehäuseschale 11, 12 eine Öffnung 34 enthält, durch die der Schallsensor 32 - je nach Anordnung des Mikrofons 8 - mit dem Rohraum 16 oder mit dem Reinraum 15 des Filtergehäuses 9 kommunizierend verbunden ist.In the Fig. 5b The embodiment shown differs from that in FIG Fig. 5a shown embodiment in that the housing shell 11, 12 includes an opening 34 through which the sound sensor 32 - depending on the arrangement of the microphone 8 - communicating with the raw space 16 or with the clean room 15 of the filter housing 9 communicating.

Bei der in Fig. 5c gezeigten Ausführungsform ist an der jeweiligen Gehäuseschale 11, 12 eine Mikrofonaufnahme 35 integral ausgeformt. In diese Mikrofonaufnahme 35 kann das Mikrofon 8 eingesetzt werden. Ebenso kann die Mikrofonaufnahme 35 als integriertes Mikrofongehäuse dienen, das mit einem entsprechenden Deckel verschließbar ist. Optional kann auch hier wieder eine Öffnung 34 vorgesehen sein.At the in Fig. 5c the embodiment shown, a microphone holder 35 is integrally formed on the respective housing shell 11, 12. In this microphone holder 35, the microphone 8 can be used. Likewise, the microphone holder 35 serve as an integrated microphone housing which can be closed with a corresponding cover. Optionally, an opening 34 may be provided here as well.

Fig. 5d zeigt eine Ausführungsform, die sich von der in Fig. 5c gezeigten Ausführungsform dadurch unterscheidet, dass die Aufnahme 35 von einem Kragen 36 eingefasst ist, der zur Festlegung des Deckels 31 genutzt werden kann. Fig. 5d shows an embodiment, which differs from the in Fig. 5c shown embodiment differs in that the receptacle 35 is bordered by a collar 36 which can be used to fix the lid 31.

Fig. 5e zeigt eine Variante, bei welcher das Mikrofon 8 im Inneren des Filtergehäuses 9 angeordnet ist, wobei insbesondere auch der Deckel 31 von innen montierbar ist. Fig. 5e shows a variant in which the microphone 8 is arranged in the interior of the filter housing 9, wherein in particular the lid 31 is mounted from the inside.

Wie bereits erläutert, kann alternativ oder kumulativ auch das Steuergerät 6 auf entsprechende Weise wie das Mikrofon 8 zumindest teilweise baulich in das Filtergehäuse 9 integriert werden. Hierzu kann entsprechend Fig. 4 ein Steuergerätgehäuse 37 integral mit einer der Gehäuseschalen 11, 12 spritzgeformt sein und die eigentliche Steuerung 38 aufnehmen. Das Steuergerät 6 ist über eine Steuerleitung 39 mit dem Aktuator 23 verbunden. Die hier extern dargestellten Leitungen 33, 39 können bei einer vorteilhaften Ausführungsform auch unmittelbar an oder in den Gehäuseschalen 11, 12 verlaufen. Ebenso können die Leitungen 33, 39 innerhalb des Gehäuses 9 verlegt sein.As already explained, alternatively or cumulatively, the control device 6 can also be integrated at least partially structurally into the filter housing 9 in a manner corresponding to the microphone 8. This can be done accordingly Fig. 4 a controller housing 37 may be injection molded integrally with one of the housing shells 11, 12 and receive the actual controller 38. The control unit 6 is connected via a control line 39 to the actuator 23. The lines 33, 39 shown here externally may in an advantageous embodiment also run directly on or in the housing shells 11, 12. Likewise, the lines 33, 39 may be routed within the housing 9.

Claims (10)

  1. An air filter for a fresh air system (2) of an internal combustion engine (1), in particular in a motor vehicle, comprising
    - a filter housing (9) that has at least two housing shells (11, 12) made from plastic,
    - at least one filter element (10) that separates in the filter housing (9) a pure chamber (15) from a crude chamber (16),
    characterized in
    - that at least one loudspeaker (7) is provided that has a loudspeaker membrane (22), an electromagnetic actuator (23) for actuating the loudspeaker membrane (22) and a loudspeaker housing (21) for accommodating the actuator (23),
    - that the loudspeaker membrane (22) is injection moulded integrally with one of the housing shells (11, 12),
    - that the loudspeaker housing (21) is mounted on the housing shell (11, 12) that has the loudspeaker membrane (22).
  2. The air filter according to claim 1,
    characterized in
    - that the actuator (23) has at least one electromagnetic coil (24) that interacts with a soft-magnetic armature (26) secured on the loudspeaker membrane (22),
    - that the loudspeaker membrane (22) has an armature receptacle (27) integrally injection moulded thereon for fixing the armature (26).
  3. The air filter according to claim 1 or claim 2, characterized in
    - that the loudspeaker housing (21) is welded to the respective housing shell (11, 12), or
    - that the loudspeaker housing (21) is secured on the respective housing shell (11, 12) by means of detachable connecting elements, wherein the loudspeaker housing (21) can in particular be clipped to the respective housing shell (11, 12).
  4. The air filter according to any one of the claims 1 to 3,
    characterized in
    that the loudspeaker membrane (22) delimits the crude chamber (16) or the pure chamber (15).
  5. The air filter according to any one of the claims 1 to 4,
    characterized in
    - that the loudspeaker membrane (22) and the associated housing shell (11, 12) are made from the same plastic, or
    - that the loudspeaker membrane (22) is made from a different plastic than the associated housing shell (11, 12).
  6. The air filter according to any one of the claims 1 to 5,
    characterized in
    - that a microphone (8) is mounted on at least one of the housing shells (11, 12), and/or
    - that at least one of the housing shells (11, 12) is injection moulded integrally with a microphone receptacle (35) with which a microphone (8) can be fixed on the respective housing shell (11, 12), and/or
    - that at least one of the housing shells (11, 12) is injection moulded integrally with a housing part (30) of a microphone (8).
  7. The air filter according to claim 6,
    characterized in
    that the microphone (8) contains a sound sensor (32) which, in the assembled state, is connected in a communicating manner to the crude chamber (16) or to the pure chamber (15).
  8. A fresh air system of an internal combustion engine (1), in particular in a motor vehicle, comprising
    - at least one air filter (4) according to any one of the claims 1 to 7,
    - a sound modulation device (5), the controller (6) of which is connected to the loudspeaker (7) of the air filter (4).
  9. The fresh air system according to claim 8,
    characterized in
    that the sound modulation device (5) is configured for actively attenuating of sound transported in the fresh air through the air filter (4).
  10. The fresh air system according to claim 8 or claim 9,
    characterized in
    that the controller (6) is connected to the microphone (8) attached to the air filter (4).
EP20090162269 2008-06-25 2009-06-09 Air filter and fresh air intake system equipped therewith Not-in-force EP2138700B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008030197A DE102008030197A1 (en) 2008-06-25 2008-06-25 Air filter and thus equipped fresh air system

Publications (3)

Publication Number Publication Date
EP2138700A2 EP2138700A2 (en) 2009-12-30
EP2138700A3 EP2138700A3 (en) 2013-01-16
EP2138700B1 true EP2138700B1 (en) 2014-10-08

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DE (1) DE102008030197A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102012200712B4 (en) 2012-01-19 2015-07-09 Eberspächer Exhaust Technology GmbH & Co. KG Exhaust device for an internal combustion engine
DE102012020780B4 (en) * 2012-10-23 2022-02-17 Audi Ag motor vehicle
JP6059524B2 (en) * 2012-12-13 2017-01-11 株式会社マーレ フィルターシステムズ Hybrid vehicle running sound control device
DE202013009278U1 (en) * 2013-10-19 2015-01-21 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Acoustic warning device and motor vehicle with an acoustic warning device
DE102015106000A1 (en) * 2015-04-20 2016-10-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sound generator for a motor vehicle
DE102015212041A1 (en) 2015-06-29 2016-12-29 Mahle International Gmbh Gas-carrying facility
DE102016004152B4 (en) 2016-04-06 2023-03-23 Audi Ag Compact speaker assembly for a vehicle
CA3102291A1 (en) * 2018-06-07 2019-12-12 Propulsa Innovations Inc. Air filtration system for combustion engine and combustion engine including same
EP4234065A1 (en) * 2022-02-24 2023-08-30 MANN+HUMMEL GmbH Housing for a filter element and filter system comprising a housing

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JPH08270518A (en) * 1995-03-31 1996-10-15 Tsuchiya Mfg Co Ltd Active noise control device
JPH094531A (en) * 1995-06-20 1997-01-07 Unisia Jecs Corp Active noise controller for internal engine
JPH09126076A (en) * 1995-10-31 1997-05-13 Tenetsukusu:Kk Speaker fitting structure of positive muffling device
DE19915592A1 (en) * 1999-04-07 2000-10-19 Porsche Ag Intake element for an internal combustion engine
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US6605131B2 (en) 2000-06-13 2003-08-12 Siemens Vdo Automotive Inc. Integrated active noise control with self-cleaning filter apparatus

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EP2138700A2 (en) 2009-12-30
EP2138700A3 (en) 2013-01-16

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