EP1350945B1 - Air cleaner for an internal combustion engine - Google Patents

Air cleaner for an internal combustion engine Download PDF

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Publication number
EP1350945B1
EP1350945B1 EP03005998A EP03005998A EP1350945B1 EP 1350945 B1 EP1350945 B1 EP 1350945B1 EP 03005998 A EP03005998 A EP 03005998A EP 03005998 A EP03005998 A EP 03005998A EP 1350945 B1 EP1350945 B1 EP 1350945B1
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EP
European Patent Office
Prior art keywords
air
air filter
fabric
housing
filter according
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
EP03005998A
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German (de)
French (fr)
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EP1350945A2 (en
EP1350945A3 (en
Inventor
Eberhard Storz
Jörg Winkel
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication date
Priority claimed from DE10304028A external-priority patent/DE10304028A1/en
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1350945A2 publication Critical patent/EP1350945A2/en
Publication of EP1350945A3 publication Critical patent/EP1350945A3/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
    • F02M35/02—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
    • F02M35/1205—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
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1238—Flow throttling or guiding by using secondary connections to the ambient, e.g. covered by a membrane or a porous member
    • 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 invention relates to an air filter for an internal combustion engine according to the preamble of claim 1.
  • an air filter for an internal combustion engine in a vehicle for the transmission of sound in the vehicle interior for which purpose a housing opening is provided by a vibrating and airtight membrane in the air filter housing. This has a sound-softening material than the housing wall, so that a targeted Schallerzeugung- and spread is made by the shape and position of the membrane.
  • an air filter for an internal combustion engine with a housing is known, which has in the region of the unfiltered air intake a lower bottom with an opening which is closed by a porous material, whereby input noise is to be reduced.
  • the object of the invention is to design an air filter housing in such a way that an external and internal noise of vehicles is to be influenced acoustically and in the air filter housing in a simple manner of mounting a sound device is to be integrated.
  • the invention advantageously achieves that sound components in the intake tract are emitted via the openings in the air filter housing covered by a fabric or a thin-walled sound element in such a way that an attractive exterior and interior noise is produced on the vehicle.
  • This is essentially achieved by providing at least one perforations exhibiting end of the airborne radiation in the unfiltered air or clean air shell of the air filter housing, which is held inserted in a housing opening and an air-permeable and fine mesh structured fabric or the thin-walled Sound element is completed.
  • the fabric may be water-repellent or waterproof.
  • the perforations are provided in an insert part which is inserted into the housing opening.
  • the fabric or the sound element can also be clamped between two perforated inserts in the housing opening and the housing opening is closed air permeable. Furthermore, a design is conceivable in which the perforations are injected into the housing wall and these are then covered by the fabric or the sound element.
  • stop dampers can be provided on the insert parts.
  • the fabric may also be adhered to the perforation.
  • the fabric used is a so-called technical fabric, which can be sealed against water, rain and dirt, etc.
  • this fabric is fine mesh designed such that a disadvantageous intake of hot air from the engine compartment is avoided, for example, during warm starts.
  • the tissue in the range of small air flow rates, such as at start, idle and at partial load of the internal combustion engine only a small flow to.
  • the tissue may allow a larger proportion of the intake air due to its structuring. This leads to a reduction of the pressure behavior in the intake system and can be used to increase the performance of the engine. Due to the different air intake in the various operating conditions of the engine, a desired hot / cold separation with respect to the intake air is possible.
  • a wall having perforations is formed on the housing wall forming the housing opening, and the membrane consisting of the fabric or the thin-walled sound element is arranged between this wall and an insert part fitted with perforations.
  • the membrane consisting of the fabric or the sound element can be connected to a frame which is arranged above or below a housing opening and connected to the housing.
  • An air filter housing 1 for an internal combustion engine of a motor vehicle is composed at least of a raw air shell 2 and a clean air shell 3, which are sealed together. Between these two shells 2 and 3, an air filter 4 is arranged. The supply of unfiltered air LR in the housing 1 via a Snorkel 20 or via an opening 5 in the Roh Kunststoffschale 2 and then through the air filter 4 in the clean air bowl 3 and from here, the clean air LM is fed via a feed line to a motor.
  • an air opening 6 is provided, for example, the top of the housing or at another location of the housing having perforations 7.
  • the opening is shown by way of example only in the Roh Kunststoffschale 2; It can also be provided in the clean air bowl 3.
  • These perforations 7 are covered to the outside with a technical fabric 8, which is executed fine-mesh structured and against water, dirt, rain and the like. Seals.
  • a thin-walled sound element which has the same properties as a tissue.
  • air can be sucked from the outside and sound components are radiated in the intake via the housing such that an external and internal noise is tuned.
  • the fabric or the sound element can be arranged swinging.
  • the opening 6 in the Rohluftschale 2 of the housing 1 is provided with perforations in an insert part 11 which is provided with holes of a certain number, shape and diameter, which are covered by the technical fabric 8 or the sound element.
  • the insert 11 may either have been molded or sprayed into the housing wall or it is a fastenable separate part.
  • the Roh Kunststoffschale 2 is in the Roh Kunststoffschale 2 between two provided with perforations 7 inserts 10 and 11, the technical fabric 8 or the sound element arranged.
  • stop damper 12, 13 With the inserts 10 and 11 inside mutually directed stop damper 12, 13 are connected, which are spaced apart or adjacent and between which the technical fabric 8 or the sound element is arranged.
  • These stop dampers 12, 13 are preferably made of a damping material such as for example, foam, so that in case of possible pressure jumps no unwanted noise, such as so-called. "Ploppge Hursche" may arise.
  • the technical fabric 8 or the sound element may have such a structure that in the range of small air flow rates, such as at start, idle and at partial load of the engine only a small air flow is allowed; however, in the area of larger air flow rates, such as at full load, a larger proportion of the intake air is allowed.
  • the formation of the raw air shell 2 with the air opening 6 a certain acoustics is achieved by sound radiation to optimize the exterior and interior noise of the vehicle.
  • the Roh Kunststoffschale 2 may be provided with the so-called air snorkel 20 by instead of or in combination with the air opening 6, an opening 6a is provided with perforations. This is then covered accordingly with the technical fabric 8 or the sound element, so that a sound radiation from this location is also possible. Furthermore, the opening 6 can also be arranged laterally or at another location of the raw air or clean air tray 2 or 3. There may be a perforation 7 having opening 6 with a tissue or sound element cover for airborne sound radiation at least in a region of an air duct from the snorkel 20 to the throttle valve of the engine.
  • the perforations 7 may also be injected into the housing wall of the Roh Kunststoffschale 2 and then covered by the fabric 8 or the sound element.
  • the opening 6 with the perforations 7 and the fabric 8 or the sound element can be arranged in any area of the air duct to the engine.
  • the technical fabric 8 or the equivalent sound element is attached to a frame 14, which is connected to the Roh Kunststoffschale 2 of the housing 1 and covers the air opening 6 in the housing 1.
  • This frame 14 may also cover an opening in the clean air tray 3.
  • the opening 6 in the Rohluftschale 2 is connected by a provided with perforations 7 housing wall 15, to which a channel 16 connects, which is closed by the fabric 8 or the sound element.

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

Description

Die Erfindung bezieht sich auf einen Luftfilter für eine Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to an air filter for an internal combustion engine according to the preamble of claim 1.

Aus der DE 199 40 610 A1 ist ein Luftfilter für eine Brennkraftmaschine in einem Fahrzeug zur Übertragung von Schall in den Fahrzeuginnenraum bekannt, wozu im Luftfiltergehäuse eine Gehäuseöffnung durch eine schwingende und luftdichte Membran vorgesehen ist. Diese weist ein schallweicheres Material auf als die Gehäusewand, so dass durch Form und Lage der Membran eine gezielte Schallerzeugung- und Ausbreitung vorgenommen wird. Aus der JP 2002 021660 A ist ein Luftfilter für eine Brennkraftmaschine mit einem Gehäuse bekannt, welches im Bereich des Rohlufteinlasses einen unteren Boden mit einer Öffnung aufweist, die durch ein poröses Material abgeschlossen ist, wodurch Eingangsgeräusche reduziert werden sollen.From the DE 199 40 610 A1 an air filter for an internal combustion engine in a vehicle for the transmission of sound in the vehicle interior is known, for which purpose a housing opening is provided by a vibrating and airtight membrane in the air filter housing. This has a sound-softening material than the housing wall, so that a targeted Schallerzeugung- and spread is made by the shape and position of the membrane. From the JP 2002 021660 A For example, an air filter for an internal combustion engine with a housing is known, which has in the region of the unfiltered air intake a lower bottom with an opening which is closed by a porous material, whereby input noise is to be reduced.

Aufgabe der Erfindung ist es, ein Luftfiltergehäuse in der Weise auszugestalten, dass ein Außen- und Innengeräusch von Fahrzeugen akustisch zu beeinflussen ist und in das Luftfiltergehäuse in einfacher Montageweise eine Schalleinrichtung zu integrieren ist.The object of the invention is to design an air filter housing in such a way that an external and internal noise of vehicles is to be influenced acoustically and in the air filter housing in a simple manner of mounting a sound device is to be integrated.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Merkmale beinhalten die Unteransprüche.This object is achieved by the features of claim 1. Further advantageous features include the subclaims.

Durch die Erfindung wird in vorteilhafter Weise erreicht, dass Schallanteile im Ansaugtrakt über die von einem Gewebe oder einem dünnwandigen Schallelement abgedeckten Öffnungen im Luftfiltergehäuse so abgestrahlt werden, dass ein attraktives Außen- und Innengeräusch am Fahrzeug entsteht. Dies wird im wesentlichen dadurch erzielt, indem zur Luftschallabstrahlung in der Rohluft- oder Reinluftschale des Luftfiltergehäuses mindestens ein Perforationen aufweisendes von Einsatzteil vorgesehen ist, das in einer gehäuseöffnung eingesetzt gehalten wird und einem luftdurchlässigen und feinmaschig strukturiertem Gewebe oder dem dünnwandigen Schallelement abgeschlossen ist. Das Gewebe kann wasserabweisend oder wasserdicht ausgeführt sein. Vorzugsweise sind die Perforationen in einem Einsatzteil vorgesehen, das in die Gehäuseöffnung eingesetzt wird. Das Gewebe oder das Schallelement kann auch zwischen zwei perforierten Einsatzteilen in der Gehäuseöffnung eingespannt sein und die Gehäuseöffnung wird luftdurchlässig verschlossen. Ferner ist auch eine Ausführung denkbar, bei der die Perforationen in die Gehäusewand eingespritzt sind und diese dann vom Gewebe oder dem Schallelement abgedeckt werden.The invention advantageously achieves that sound components in the intake tract are emitted via the openings in the air filter housing covered by a fabric or a thin-walled sound element in such a way that an attractive exterior and interior noise is produced on the vehicle. This is essentially achieved by providing at least one perforations exhibiting end of the airborne radiation in the unfiltered air or clean air shell of the air filter housing, which is held inserted in a housing opening and an air-permeable and fine mesh structured fabric or the thin-walled Sound element is completed. The fabric may be water-repellent or waterproof. Preferably, the perforations are provided in an insert part which is inserted into the housing opening. The fabric or the sound element can also be clamped between two perforated inserts in the housing opening and the housing opening is closed air permeable. Furthermore, a design is conceivable in which the perforations are injected into the housing wall and these are then covered by the fabric or the sound element.

Es wird durch diese Ausführung einer durch das Gewebe oder dem Schallelement abgedeckten Gehäuseöffnung mit Perforationen in vorteilhafter Weise erreicht, dass Schallanteile beispielsweise im Ansaugtrakt über die Gehäuseöffnung abgestrahlt werden. Insbesondere können auf das gewünschte Innen- und Außengeräusch abgestimmte Perforationen in der Gehäusewand angeordnet werden, das heißt, es ist eine bestimmte Anzahl von Öffnungen bzw. eine bestimmte geometrische Form oder auch ein bestimmter Durchmesser der Öffnungen möglich.It is achieved by this embodiment of a covered by the fabric or the sound element housing opening with perforations in an advantageous manner that sound components are radiated, for example, in the intake via the housing opening. In particular, matched to the desired interior and exterior noise perforations in the housing wall can be arranged, that is, it is a certain number of openings or a certain geometric shape or a certain diameter of the openings possible.

Damit die perforierten Einsatzteile mit zwischenliegendem Gewebe oder Schallelement keine Anschlaggeräusche des Gewebes oder des Schallelements bei Drucksprüngen übertragen können, können an den Einsatzteilen Anschlagdämpfer vorgesehen werden. Das Gewebe kann auch auf die Perforation aufgeklebt sein.So that the perforated insert parts with intermediate tissue or sound element can not transmit impact noises of the fabric or the damping element during pressure jumps, stop dampers can be provided on the insert parts. The fabric may also be adhered to the perforation.

Das verwendete Gewebe ist ein sogenanntes technisches Gewebe, welches gegenüber Wasser, Regen und Schmutz usw. abgedichtet sein kann. Insbesondere ist dieses Gewebe feinmaschig derart ausgeführt, dass eine nachteilige Ansaugung von Warmluft aus dem Motorraum beispielsweise bei Warmstarts vermieden wird. Dagegen läßt das Gewebe im Bereich kleiner Luftdurchsätze, wie beispielsweise beim Start, Leerlauf und bei Teillast der Brennkraftmaschine nur eine geringe Durchströmung zu. Im Bereich größerer Luftdurchsätze, wie beispielsweise bei Vollast der Brennkraftmaschine kann das Gewebe aufgrund seiner Strukturierung einen größeren Anteil der angesaugten Luft zulassen. Dies führt zu einer Reduzierung des Druckverhaltens in der Sauganlage und kann zu einer Leistungssteigerung des Motors genutzt werden. Durch die unterschiedliche Luftansaugung in den verschiedenen Betriebszuständen des Motors ist eine gewünschte Warm-/Kalttrennung hinsichtlich der Ansaugluft möglich.The fabric used is a so-called technical fabric, which can be sealed against water, rain and dirt, etc. In particular, this fabric is fine mesh designed such that a disadvantageous intake of hot air from the engine compartment is avoided, for example, during warm starts. In contrast, the tissue in the range of small air flow rates, such as at start, idle and at partial load of the internal combustion engine only a small flow to. In the range of larger air flow rates, such as at full load of the internal combustion engine, the tissue may allow a larger proportion of the intake air due to its structuring. This leads to a reduction of the pressure behavior in the intake system and can be used to increase the performance of the engine. Due to the different air intake in the various operating conditions of the engine, a desired hot / cold separation with respect to the intake air is possible.

Nach einer weiteren Ausführung der Erfindung ist an die die Gehäuseöffnung bildende Gehäusewand eine Perforationen aufweisenden Wand eingeformt und zwischen dieser Wand und einem aufgesetzten Perforationen aufweisenden Einsatzteil ist die aus dem Gewebe oder dem dünnwandigen Schallelement bestehenden Membran angeordnet.According to a further embodiment of the invention, a wall having perforations is formed on the housing wall forming the housing opening, and the membrane consisting of the fabric or the thin-walled sound element is arranged between this wall and an insert part fitted with perforations.

Ferner kann die aus dem Gewebe oder dem Schallelement bestehende Membran mit einem Rahmen verbunden sein, der oberhalb oder unterhalb einer Gehäuseöffnung angeordnet und mit dem Gehäuse verbunden ist.Furthermore, the membrane consisting of the fabric or the sound element can be connected to a frame which is arranged above or below a housing opening and connected to the housing.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Es zeigen

Fig. 1
eine schematische Darstellung eines Luftfiltergehäuses mit einer perforierten Luftöffnung in einem Einsatzteil und einer Abdeckung mittels eines technischen Gewebes oder einem Schallelement,
Fig. 2
eine weitere Ausführung mit zwischen zwei perforierten Einsatzteilen angeordneten technischen Gewebes oder einem Schallelement,
Fig. 3
eine weitere Ausführung im Schnitt eines mit einem Rahmen verbundenen Gewebes oder Schallelements,
Fig. 4
eine weitere Ausführung im Schnitt, bei der das Gewebe oder das Schallelement mit einer aufgesetzten Schale verbunden ist und
Fig. 5
eine weitere Ausführung im Schnitt, bei der das Gewebe oder Schallelement direkt mit der Schale verbunden ist.
Show it
Fig. 1
a schematic representation of an air filter housing with a perforated air opening in an insert and a cover by means of a technical fabric or a sound element,
Fig. 2
another embodiment with between two perforated inserts arranged technical fabric or a sound element,
Fig. 3
a further embodiment in the section of a fabric or a joint element connected to a frame,
Fig. 4
a further embodiment in section, in which the tissue or the sound element is connected to an attached shell and
Fig. 5
another embodiment in section, in which the fabric or sound element is connected directly to the shell.

Ein Luftfiltergehäuse 1 für eine Brennkraftmaschine eines Kraftfahrzeugs setzt sich zumindestens aus einer Rohluftschale 2 und einer Reinluftschale 3 zusammen, die dicht miteinander verbunden sind. Zwischen diesen beiden Schalen 2 und 3 ist ein Luftfilter 4 angeordnet. Die Zuführung von Rohluft LR in das Gehäuse 1 erfolgt über einen Schnorchel 20 bzw. über eine Öffnung 5 in der Rohluftschale 2 und dann durch den Luftfilter 4 in die Reinluftschale 3 und von hier aus wird die Reinluft LM über eine Zuführleitung einem Motor zugeleitet.An air filter housing 1 for an internal combustion engine of a motor vehicle is composed at least of a raw air shell 2 and a clean air shell 3, which are sealed together. Between these two shells 2 and 3, an air filter 4 is arranged. The supply of unfiltered air LR in the housing 1 via a Snorkel 20 or via an opening 5 in the Rohluftschale 2 and then through the air filter 4 in the clean air bowl 3 and from here, the clean air LM is fed via a feed line to a motor.

In der Rohluftschale 2 oder in der Reinluftschale 3 des Luftfiltergehäuses 1 ist beispielsweise obenseitig des Gehäuses oder an einem anderen Ort des Gehäuses eine Luftöffnung 6 vorgesehen, die Perforationen 7 aufweist. Die Öffnung ist exemplarisch nur in der Rohluftschale 2 gezeigt; sie kann auch in der Reinluftschale 3 vorgesehen sein. Diese Perforationen 7 sind nach außen hin mit einem technischen Gewebe 8 abgedeckt, das feinmaschig strukturiert ausgeführt ist und gegen Wasser, Schmutz, Regen und dgl. abdichtet. Es kann auch ein dünnwandiges Schallelement verwendet werden, das die gleichen Eigenschaften aufweist, wie ein Gewebe. Dagegen kann Luft von außen angesogen werden und Schallanteile werden im Ansaugtrakt über das Gehäuse derart abgestrahlt, dass ein Außen- und Innengeräusch abstimmbar ist. Entsprechendes gilt auch für die Reinluftschale 3. Das Gewebe oder das Schallelement kann schwingend angeordnet sein.In the raw air shell 2 or in the clean air shell 3 of the air filter housing 1, an air opening 6 is provided, for example, the top of the housing or at another location of the housing having perforations 7. The opening is shown by way of example only in the Rohluftschale 2; It can also be provided in the clean air bowl 3. These perforations 7 are covered to the outside with a technical fabric 8, which is executed fine-mesh structured and against water, dirt, rain and the like. Seals. It is also possible to use a thin-walled sound element which has the same properties as a tissue. In contrast, air can be sucked from the outside and sound components are radiated in the intake via the housing such that an external and internal noise is tuned. The same applies to the clean air tray 3. The fabric or the sound element can be arranged swinging.

In einer ersten Ausführung gem. Fig. 1 ist die Öffnung 6 in der Rohluftschale 2 des Gehäuses 1 mit Perforationen in einem Einsatzteil 11 versehen, das mit Löchern bestimmter Anzahl, Form und Durchmesser versehen ist, die von dem technischen Gewebe 8 oder dem Schallelement abgedeckt sind. Das Einsatzteil 11 kann entweder in die Gehäusewand eingeformt bzw. mitgespritzt worden sein oder es ist ein befestigbares separates Teil. Nach einer weiteren Ausführung gem. Fig. 2 ist in der Rohluftschale 2 zwischen zwei mit Perforationen 7 versehenen Einsatzteilen 10 und 11 das technische Gewebe 8 oder das Schallelement angeordnet.In a first embodiment acc. Fig. 1 the opening 6 in the Rohluftschale 2 of the housing 1 is provided with perforations in an insert part 11 which is provided with holes of a certain number, shape and diameter, which are covered by the technical fabric 8 or the sound element. The insert 11 may either have been molded or sprayed into the housing wall or it is a fastenable separate part. According to another embodiment acc. Fig. 2 is in the Rohluftschale 2 between two provided with perforations 7 inserts 10 and 11, the technical fabric 8 or the sound element arranged.

Mit den Einsatzteilen 10 und 11 sind innenseitig zueinander gerichtete Anschlagdämpfer 12, 13 verbunden, die zueinander beabstandet oder anliegend sind und zwischen denen das technische Gewebe 8 oder das Schallelement angeordnet ist. Diese Anschlagdämpfer 12, 13 bestehen vorzugsweise aus einem Dämpfungswerkstoff wie beispielsweise aus Schaumstoff, so dass bei möglichen Drucksprüngen keine unerwünschten Geräusche, wie beispielsweise sog. "Ploppgeräusche" entstehen können.With the inserts 10 and 11 inside mutually directed stop damper 12, 13 are connected, which are spaced apart or adjacent and between which the technical fabric 8 or the sound element is arranged. These stop dampers 12, 13 are preferably made of a damping material such as for example, foam, so that in case of possible pressure jumps no unwanted noise, such as so-called. "Ploppgeräusche" may arise.

Das technische Gewebe 8 oder das Schallelement kann eine solche Struktur aufweisen, dass im Bereich kleiner Luftdurchsätze, wie beim Start, Leerlauf und bei Teillast des Motors nur eine geringe Luftdurchströmung zugelassen wird; dagegen im Bereich größerer Luftdurchsätze, wie bei Vollast, wird ein größerer Anteil der angesaugten Luft zugelassen.The technical fabric 8 or the sound element may have such a structure that in the range of small air flow rates, such as at start, idle and at partial load of the engine only a small air flow is allowed; however, in the area of larger air flow rates, such as at full load, a larger proportion of the intake air is allowed.

Durch die Ausbildung der Rohluftschale 2 mit der Luftöffnung 6 wird eine bestimmte Akustik durch Schallabstrahlung erzielt um das Außen- und Innengeräusch des Fahrzeugs zu optimieren.The formation of the raw air shell 2 with the air opening 6 a certain acoustics is achieved by sound radiation to optimize the exterior and interior noise of the vehicle.

Die Rohluftschale 2 kann mit dem sogenannten Luftschnorchel 20 versehen sein, indem statt oder in Kombination mit der Luftöffnung 6 eine Öffnung 6a mit Perforationen vorgesehen ist. Diese ist dann entsprechend mit dem technischen Gewebe 8 oder dem Schallelement abgedeckt, so dass eine Schallabstrahlung auch von diesem Ort aus möglich ist. Desweiteren kann die Öffnung 6 auch seitlich oder an einem anderen Ort der Rohluft- oder Reinluftschale 2 oder 3 angeordnet sein. Es kann eine Perforationen 7 aufweisende Öffnung 6 mit einer Gewebe- oder Schallelementabdeckung zur Luftschallabstrahlung wenigstens in einem Bereich einer Luftführung vom Schnorchel 20 bis zur Drosselklappe des Motors angeordnet sein.The Rohluftschale 2 may be provided with the so-called air snorkel 20 by instead of or in combination with the air opening 6, an opening 6a is provided with perforations. This is then covered accordingly with the technical fabric 8 or the sound element, so that a sound radiation from this location is also possible. Furthermore, the opening 6 can also be arranged laterally or at another location of the raw air or clean air tray 2 or 3. There may be a perforation 7 having opening 6 with a tissue or sound element cover for airborne sound radiation at least in a region of an air duct from the snorkel 20 to the throttle valve of the engine.

Die Perforationen 7 können auch in die Gehäusewand der Rohluftschale 2 mit eingespritzt sein und dann über das Gewebe 8 oder das Schallelement abgedeckt werden. Die Öffnung 6 mit den Perforationen 7 und dem Gewebe 8 oder dem Schallelement kann in jedem Bereich der Luftführung zum Motor angeordnet werden.The perforations 7 may also be injected into the housing wall of the Rohluftschale 2 and then covered by the fabric 8 or the sound element. The opening 6 with the perforations 7 and the fabric 8 or the sound element can be arranged in any area of the air duct to the engine.

Gemäß einer weiteren Ausführungsform nach Fig. 3 ist das technische Gewebe 8 oder das gleichwirkende Schallelement an einem Rahmen 14 befestigt, der mit der Rohluftschale 2 des Gehäuses 1 verbunden ist und die Luftöffnung 6 im Gehäuse 1 abdeckt. Dieser Rahmen 14 kann auch eine Öffnung in der Reinluftschale 3 abdecken.According to a further embodiment according to Fig. 3 the technical fabric 8 or the equivalent sound element is attached to a frame 14, which is connected to the Rohluftschale 2 of the housing 1 and covers the air opening 6 in the housing 1. This frame 14 may also cover an opening in the clean air tray 3.

Nach der weiteren Ausführung gem. Fig. 4 ist die Öffnung 6 in der Rohluftschale 2 durch eine mit Perforationen 7 versehene Gehäusewand 15 verbunden, an die sich ein Kanal 16 anschließt, welcher von dem Gewebe 8 oder dem Schallelement abgeschlossen ist. Eine Abdeckung nach außen hin erfolgt über eine Schale 17, die ebenfalls Perforationen 7 aufweist.After the further execution acc. Fig. 4 the opening 6 in the Rohluftschale 2 is connected by a provided with perforations 7 housing wall 15, to which a channel 16 connects, which is closed by the fabric 8 or the sound element. A cover to the outside via a shell 17, which also has perforations 7.

Claims (12)

  1. Air filter (4) for an internal combustion engine having a housing (1) in which is arranged an air filter element which is arranged between an unfiltered air inlet in an unfiltered air shell (2) and a clean air outlet in a clean air shell (3), and an opening (6) is provided in the housing (1), which opening (6) is covered by a diaphragm, characterized in that, for airborne sound emission, at least one insert part (11) which has perforations (7) is provided in the unfiltered air shell (2) or in the clean air shell (3) of the air filter housing (1), which insert part (11) is held inserted in the housing opening (6) and is covered by an air-permeable and fine-mesh-structured fabric (8) or a thin-walled sound element.
  2. Air filter according to Claim 1, characterized in that the insert part (11) is inserted into the housing wall of the unfiltered air shell (2) or of the clean air shell (3).
  3. Air filter according to Claim 1 or 2, characterized in that the fabric (8) or the sound element is clamped between two perforated insert parts (10 and 11) which are inserted into the housing opening (6), and the housing opening (6) can be closed off in an air-permeable fashion.
  4. Air filter according to Claims 1, 2 or 3, characterized in that the insert parts (10, 11) have opposite stop dampers (12, 13) and the fabric (8) or the sound element is arranged between said stop dampers (12, 13).
  5. Air filter according to Claim 4, characterized in that the stop dampers (12, 13) are composed of a damping material.
  6. Air filter according to one of the preceding claims, characterized in that a wall which has perforations (7) is integrally formed on the housing wall which forms the housing opening (6), and the diaphragm which is composed of the fabric (8) or the thin-walled sound element is arranged between said wall and a placed-on insert part (17) which has perforations.
  7. Air filter according to one of the preceding claims, characterized in that the diaphragm which is composed of the fabric (8) or the sound element is connected to a frame (14) which is arranged above or below the housing opening (6) and which can be connected to the air filter housing (1).
  8. Air filter according to one or more of the preceding claims, characterized in that the fabric (8) or the sound element has such a degree of air permeability that a lower air throughput occurs at part load of the internal combustion engine than at full load of the internal combustion engine.
  9. Air filter according to one or more of the preceding claims, characterized in that the housing opening (6) is provided on an upper side (15) or on a side wall of the unfiltered air shell (2).
  10. Air filter according to Claim 1, characterized in that an opening (6a) with perforations (7) is provided in an air snorkel (20) of the unfiltered air shell (2) which is covered by the fabric (8) or the sound element.
  11. Air filter according to Claim 1, characterized in that the perforations (7) are integrally injection-moulded into a wall of the unfiltered air shell (2) and are covered by the fabric (8) or the sound element.
  12. Air filter according to one of the preceding claims, characterized in that an opening (6) which has perforations and having a fabric or sound element cover for airborne sound emission is arranged at least in a region of an air guide from the snorkel (20) to a throttle flap of the engine.
EP03005998A 2002-03-27 2003-03-18 Air cleaner for an internal combustion engine Expired - Lifetime EP1350945B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10213603 2002-03-27
DE10213603 2002-03-27
DE10304028A DE10304028A1 (en) 2002-03-27 2003-02-01 Air filter for an internal combustion engine
DE10304028 2003-02-01

Publications (3)

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EP1350945A2 EP1350945A2 (en) 2003-10-08
EP1350945A3 EP1350945A3 (en) 2003-12-17
EP1350945B1 true EP1350945B1 (en) 2008-06-11

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US (1) US6881237B2 (en)
EP (1) EP1350945B1 (en)
JP (1) JP2003328884A (en)
DE (1) DE50309968D1 (en)

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Also Published As

Publication number Publication date
US6881237B2 (en) 2005-04-19
DE50309968D1 (en) 2008-07-24
EP1350945A2 (en) 2003-10-08
JP2003328884A (en) 2003-11-19
US20040011011A1 (en) 2004-01-22
EP1350945A3 (en) 2003-12-17

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