EP2305992A2 - Air filter for combustion engine - Google Patents

Air filter for combustion engine Download PDF

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Publication number
EP2305992A2
EP2305992A2 EP10174131A EP10174131A EP2305992A2 EP 2305992 A2 EP2305992 A2 EP 2305992A2 EP 10174131 A EP10174131 A EP 10174131A EP 10174131 A EP10174131 A EP 10174131A EP 2305992 A2 EP2305992 A2 EP 2305992A2
Authority
EP
European Patent Office
Prior art keywords
air
air inlet
inlet opening
air filter
filter element
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.)
Withdrawn
Application number
EP10174131A
Other languages
German (de)
French (fr)
Other versions
EP2305992A3 (en
Inventor
Dagmar Ruder
Herbert Schenk
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
Original Assignee
Mann and Hummel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP2305992A2 publication Critical patent/EP2305992A2/en
Publication of EP2305992A3 publication Critical patent/EP2305992A3/en
Withdrawn legal-status Critical Current

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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
    • F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
    • F02M35/0202—Manufacturing or assembling; Materials for air cleaner housings
    • F02M35/0203—Manufacturing or assembling; Materials for air cleaner housings by using clamps, catches, locks or the like, e.g. for disposable plug-in filter cartridges
    • 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
    • F02M35/0204—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof for connecting or joining to other devices, e.g. pipes
    • 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
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • 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
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/082—By-pass means
    • 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
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/088—Water, snow or ice proofing; Separation or drainage of water, snow or ice

Definitions

  • the invention relates to an air filter for an internal combustion engine according to the features of the preamble of claim 1.
  • This air filter for an internal combustion engine is known.
  • This air filter consists of a zigzag-folded filter medium, which is supplied with cold, unpurified air, cleans this air and the internal combustion engine feeds. If the cold air at low temperatures and heavy snowdrifts also contains snow, which is sucked in the intake tract of the engine, the snow will accumulate on the filter and can clog this filter.
  • an air filter housing for an internal combustion engine having a first air inlet opening and a second air inlet opening.
  • sliding valves are provided, which are opened at a negative pressure exceeding a certain value, and allow additional air to flow on the filter, so that an engine operation is still possible, even if snow certain parts of the air filter clogged.
  • the slide valves are provided with springs and can move along a guide.
  • the invention has for its object to provide an air filter for an internal combustion engine with a first and a second air inlet opening, wherein the known prior art is improved and a simple and economical solution can be found.
  • the essential advantage of the invention lies in the fact that the second air inlet opening is equipped with an umbrella valve which closes or opens the air inlet opening, wherein the umbrella valve is supported on a sealing edge and consists of an elastomer material.
  • umbrella valves are easy to manufacture and require no additional spring-effective elements, since the structure of a shield valve is designed such that the shape of the screen has a spring-effective function.
  • this is provided with a screen stick or a screen support, which also represents the attachment element for the umbrella valve and is clipped into the wall of a housing of the air filter.
  • a screen stick or a screen support which also represents the attachment element for the umbrella valve and is clipped into the wall of a housing of the air filter.
  • the shield valve is provided with a frame, wherein the frame surrounds an air space between the inlet, which can be opened and closed by the umbrella valve, and an outer contour of the air filter element. If the air filter itself is exposed to snow, this frame keeps the snow away from the room that can be switched on and off by the umbrella valve. Thus, this space can be used for supplying snow-free air.
  • At least one further screen valve is arranged within the frame. It is expedient to dimension the passage area for the air through the umbrella valves essentially so that this area corresponds to the suction area of the intake pipe, so that the internal combustion engine can be supplied with the sufficient amount of intake air. So that no snow-laden air enters via the umbrella valves, it is expedient to arrange the second air inlet opening in an area which is close to a warm component during operation of the internal combustion engine, for example in the region of an exhaust manifold or an exhaust part of the internal combustion engine.
  • a further embodiment of the invention provides, the frame, which is provided from the second air inlet opening to the filter element, so to make it 10 to 30% of the outer surface of the filter element includes, on the one hand, the cleaning of the air with high efficiency is possible, on the other hand, a rapid defrosting of snow in other areas of the filter element can take place.
  • an opening to the outside for discharging liquid, in particular water, is provided within the frame on the housing.
  • a second air inlet opening is located in the geodetically lower region of an air filter housing, in which water can also accumulate. This water is discharged via a small water outlet to the outside.
  • the filter element for cleaning air from a round filter element which has a zigzag folded filter material and is constructed concentrically and advantageously has on its surface a Vorvlies for coarse separation of particles.
  • FIG. 1 shown in sectional view air filter consists of a housing 10, a lid 11 disposed on the housing and a arranged on the housing 10 clean air tube 12 and a in FIG. 2 Rohluftansaugrohr 13.
  • a round filter element 14 which consists of a zigzag folded filter medium 15.
  • This filter medium 15 is arranged on a support tube 16.
  • the support tube seals the round filter element 14 via an additional seal 17 on an inwardly guided nozzle 18 of the clean air tube 12.
  • the round filter element is provided with a closed end disk 19 which has a fixing element 20 in the center, this fixing element 20 resting on the housing structure of the housing 10 and thus positioning the round filter element 14 in the housing.
  • the cover 11 can be pivoted upwards and releases the interior of the filter housing so that the round filter element 14 can be exchanged.
  • the round filter element is on its outer periphery with a Vorvlies 21 for deposition provided by coarse particles. This pre-fleece extends over the entire surface of the round filter element 14.
  • the housing has a frame 22, which - as in FIG. 1 to see - from two frame parts 23, 24 and - as in FIG. 2 to see - consists of the frame parts 25, 26.
  • the frame forms a chamber 38 between the housing bottom and the round filter element 14, that is, the frame extends to its Vorvlies.
  • two umbrella valves 27, 28 are arranged, ie these are, as described below, clipped to the housing or the housing structure.
  • FIG. 1 the surface of the round filter element 14 be free, so that open due to an increased negative pressure within the round filter element 14, the umbrella valves 27, 28 and air can flow from the area below the housing 10 to the round filter element 14, thereby the internal combustion engine is supplied with air.
  • the air leads to a heating of the round filter element 14, so that also the deposited snow will defrost, so that the entire surface of the round filter element 14 can be acted upon with intake air.
  • FIG. 3 shows an umbrella valve viewed from the bottom.
  • the umbrella valve 27 rests on a circumferential web 30 of the housing 10.
  • the housing itself has to support the umbrella valve four webs 31, 32, 33, 34, which are connected in the middle with an eyelet 35. Within this eyelet of the mounting pole 36 of the umbrella valve 27 is engaged.
  • FIG. 4 shows the umbrella valve 27 in a perspective view.
  • the attachment via the attachment floor 36 is effected by a groove 37 which receives the eyelet 35.
  • the umbrella valve may consist of a fluorosilicone. It can of course also consist of an elastomer material. Depending on the opening pressure, the umbrella valve must be designed constructively. The internal elasticity of the umbrella valve ensures a reliable operation of the same.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The filter has two air inlet openings opened against surroundings at a valve, and a round filter element (14) arranged between air inlet openings and an air outlet opening. One of the air inlet opening is connected with an intake pipe for intake of outside air, and another air inlet opening is equipped with umbrella valves (27, 28), which close or open the latter air inlet opening. The umbrella valves are supported on a sealing edge and comprise elastomer material. A region of the latter air inlet opening is provided with a frame (22).

Description

Die Erfindung betrifft einen Luftfilter für eine Brennkraftmaschine nach den Merkmalen des Oberbegriffes des Anspruchs 1.The invention relates to an air filter for an internal combustion engine according to the features of the preamble of claim 1.

Stand der TechnikState of the art

Aus der US 7,393,372 ist ein Luftfilter für eine Brennkraftmaschine bekannt. Dieser Luftfilter besteht aus einem zickzackförmig gefalteten Filtermedium, das mit kalter, ungereinigter Luft angeströmt wird, diese Luft reinigt und der Brennkraftmaschine zuführt. Sofern die kalte Luft bei niedrigen Temperaturen und starken Schneeverwehungen auch Schnee enthält, der im Ansaugtrakt der Brennkraftmaschine angesaugt wird, wird sich der Schnee auf dem Filter anlagern und kann diesen Filter verstopfen.From the US 7,393,372 an air filter for an internal combustion engine is known. This air filter consists of a zigzag-folded filter medium, which is supplied with cold, unpurified air, cleans this air and the internal combustion engine feeds. If the cold air at low temperatures and heavy snowdrifts also contains snow, which is sucked in the intake tract of the engine, the snow will accumulate on the filter and can clog this filter.

Um die Brennkraftmaschine dennoch weiterbetreiben zu können, ist es erforderlich, eine zweite Lufteinlassöffnung vorzusehen, über die schneefreie Luft angesaugt werden kann. Hierzu verwendet der Stand der Technik ein zusätzliches Rohr, welches mit Lamellen zum größten Teil verschlossen ist.In order to still operate the internal combustion engine, it is necessary to provide a second air inlet opening, can be sucked through the snow-free air. For this purpose, the prior art uses an additional tube, which is closed with lamellae for the most part.

Es ist weiterhin aus der DE 103 32 453 ein Luftfiltergehäuse für eine Brennkraftmaschine bekannt, mit einer ersten Lufteinlassöffnung und einer zweiten Lufteinlassöffnung. An der zweiten Lufteinlassöffnung sind Schiebeventile vorgesehen, die bei einem Unterdruck, der einen bestimmten Wert überschreitet, geöffnet werden und zusätzliche Luft auf den Filter einströmen lassen, so dass ein Motorenbetrieb auch dann noch möglich ist, wenn Schnee bestimmte Teile des Luftfilters verstopft. Die Schiebeventile sind mit Federn versehen und können sich entlang einer Führung bewegen.It is still out of the DE 103 32 453 an air filter housing for an internal combustion engine, having a first air inlet opening and a second air inlet opening. On the second air inlet opening sliding valves are provided, which are opened at a negative pressure exceeding a certain value, and allow additional air to flow on the filter, so that an engine operation is still possible, even if snow certain parts of the air filter clogged. The slide valves are provided with springs and can move along a guide.

Der Erfindung liegt die Aufgabe zugrunde, einen Luftfilter für eine Brennkraftmaschine mit einer ersten und einer zweiten Lufteinlassöffnung zu schaffen, wobei der bekannte Stand der Technik verbessert wird und eine einfache und wirtschaftliche Lösung zu finden ist.The invention has for its object to provide an air filter for an internal combustion engine with a first and a second air inlet opening, wherein the known prior art is improved and a simple and economical solution can be found.

Offenbarung der ErfindungDisclosure of the invention

Diese Aufgabe wird durch die kennzeichnenden Merkmale des unabhängigen Patentanspruchs 1 gelöst. Der wesentliche Vorteil der Erfindung liegt darin, dass die zweite Lufteinlassöffnung mit einem Schirmventil ausgestattet ist, welches die Lufteinlassöffnung verschließt bzw. öffnet, wobei sich das Schirmventil auf einem Dichtrand abstützt und aus einem Elastomermaterial besteht. Solche Schirmventile sind einfach in der Herstellung und benötigen keine zusätzlichen federwirksamen Elemente, da der Aufbau eines Schirmventils derart gestaltet ist, dass die Formgebung des Schirms eine federwirksame Funktion hat.This object is solved by the characterizing features of independent claim 1. The essential advantage of the invention lies in the fact that the second air inlet opening is equipped with an umbrella valve which closes or opens the air inlet opening, wherein the umbrella valve is supported on a sealing edge and consists of an elastomer material. Such umbrella valves are easy to manufacture and require no additional spring-effective elements, since the structure of a shield valve is designed such that the shape of the screen has a spring-effective function.

Gemäß einer Ausgestaltung des Schirmventils ist dieses mit einem Schirmstock oder einem Schirmträger versehen, der gleichzeitig das Befestigungselement für das Schirmventil darstellt und in die Wandung eines Gehäuses des Luftfilters eingeclipst ist. Damit sind auch keine zusätzlichen Befestigungsmittel für das Ventil erforderlich.According to one embodiment of the umbrella valve this is provided with a screen stick or a screen support, which also represents the attachment element for the umbrella valve and is clipped into the wall of a housing of the air filter. Thus, no additional fastening means for the valve are required.

Weiterbildungsgemäß ist das Schirmventil mit einem Rahmen versehen, wobei der Rahmen einen Luftraum zwischen dem Einlass, der durch das Schirmventil geöffnet und verschlossen werden kann, und einer Außenkontur des Luftfilterelementes umgibt. Sofern der Luftfilter selbst mit Schnee beaufschlagt wird, hält dieser Rahmen den Schnee von dem durch das Schirmventil ein- und ausschaltbaren Raum fern. Damit kann dieser Raum zum Zuführen von schneefreier Luft verwendet werden.According to the invention, the shield valve is provided with a frame, wherein the frame surrounds an air space between the inlet, which can be opened and closed by the umbrella valve, and an outer contour of the air filter element. If the air filter itself is exposed to snow, this frame keeps the snow away from the room that can be switched on and off by the umbrella valve. Thus, this space can be used for supplying snow-free air.

Weiterbildungsgemäß ist innerhalb des Rahmens wenigstens ein weiteres Schirmventil angeordnet. Es ist zweckmäßig, die Durchlassfläche für die Luft durch die Schirmventile im Wesentlichen so zu bemessen, dass diese Fläche der Ansaugfläche des Ansaugrohres entspricht, so dass die Brennkraftmaschine mit der ausreichenden Menge an Ansaugluft versorgt werden kann. Damit über die Schirmventile keine schneebelastete Luft eintritt, ist es zweckmäßig, die zweite Lufteinlassöffnung in einem Bereich anzuordnen, der nahe einem beim Betrieb der Brennkraftmaschine warmen Bauteil liegt, beispielsweise im Bereich eines Abgaskrümmers oder eines Auspuffteils der Brennkraftmaschine.According to training, at least one further screen valve is arranged within the frame. It is expedient to dimension the passage area for the air through the umbrella valves essentially so that this area corresponds to the suction area of the intake pipe, so that the internal combustion engine can be supplied with the sufficient amount of intake air. So that no snow-laden air enters via the umbrella valves, it is expedient to arrange the second air inlet opening in an area which is close to a warm component during operation of the internal combustion engine, for example in the region of an exhaust manifold or an exhaust part of the internal combustion engine.

Es besteht auch die Möglichkeit, den Einlass der zweiten Lufteinlassöffnung mit einem Ansaugrohr zu versehen, welches sich bis zu einem aufgewärmten Bauteil hin erstreckt.It is also possible to provide the inlet of the second air inlet opening with an intake pipe which extends as far as a heated component.

Eine weitere Ausgestaltung der Erfindung sieht vor, den Rahmen, der von der zweiten Lufteinlassöffnung bis zu dem Filterelement vorgesehen ist, so zu gestalten, dass er 10 bis 30 % der Außenfläche des Filterelementes einbezieht, damit einerseits die Reinigung der Luft mit einem hohen Wirkungsgrad möglich ist, andererseits auch eine rasche Abtauung von Schnee in anderen Bereichen des Filterelementes erfolgen kann.A further embodiment of the invention provides, the frame, which is provided from the second air inlet opening to the filter element, so to make it 10 to 30% of the outer surface of the filter element includes, on the one hand, the cleaning of the air with high efficiency is possible, on the other hand, a rapid defrosting of snow in other areas of the filter element can take place.

Weiterbildungsgemäß ist innerhalb des Rahmens an dem Gehäuse eine Öffnung nach außen zum Austragen von Flüssigkeit, insbesondere Wasser, vorgesehen. Üblicherweise befindet sich eine solche zweite Lufteinlassöffnung im geodätisch unteren Bereich eines Luftfiltergehäuses, in welchem sich auch Wasser ansammeln kann. Dieses Wasser wird über einen kleinen Wasserauslass nach außen abgeführt.According to training, an opening to the outside for discharging liquid, in particular water, is provided within the frame on the housing. Usually, such a second air inlet opening is located in the geodetically lower region of an air filter housing, in which water can also accumulate. This water is discharged via a small water outlet to the outside.

Gemäß einer Ausgestaltung der Erfindung besteht das Filterelement zur Reinigung von Luft aus einem Rundfilterelement, welches ein zickzackförmig gefaltetes Filtermaterial aufweist und konzentrisch aufgebaut ist und in vorteilhafter Weise an seiner Oberfläche ein Vorvlies zur Grobabscheidung von Partikeln besitzt.According to one embodiment of the invention, the filter element for cleaning air from a round filter element which has a zigzag folded filter material and is constructed concentrically and advantageously has on its surface a Vorvlies for coarse separation of particles.

Diese und weitere Merkmale gehen nicht nur aus den Ansprüchen, sondern auch aus der Beschreibung und den Zeichnungen hervor.These and other features are evident not only from the claims, but also from the description and the drawings.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Ein Ausführungsbeispiel der Erfindung wird anhand von Zeichnungen näher erläutert. Es zeigt:

Figur 1
eine Schnittdarstellung durch einen Luftfilter für eine Brenn- kraftmaschine,
Figur 2
einen Teilschnitt A-A des in Figur 1 gezeigten Luftfilters in einer Frontdarstellung,
Figur 3
die perspektivische Unteransicht auf ein an einem Luftfilter angeordnetes Schirmventil,
Figur 4
die perspektivische Darstellung eines Schirmventils.
An embodiment of the invention will be explained in more detail with reference to drawings. It shows:
FIG. 1
a sectional view through an air filter for an internal combustion engine,
FIG. 2
a partial section AA of in FIG. 1 shown air filter in a front view,
FIG. 3
the perspective bottom view of an arranged on an air filter umbrella valve,
FIG. 4
the perspective view of a shield valve.

Ausführungsform(en) der ErfindungEmbodiment (s) of the invention

Der in Figur 1 in Schnittdarstellung gezeigte Luftfilter besteht aus einem Gehäuse 10, einem an dem Gehäuse angeordneten Deckel 11 und einem an dem Gehäuse 10 angeordneten Reinluftrohr 12 sowie einem in Figur 2 dargestellten Rohluftansaugrohr 13. Innerhalb des Gehäuses 10 befindet sich ein Rundfilterelement 14, das aus einem zickzackförmig gefalteten Filtermedium 15 besteht. Dieses Filtermedium 15 ist auf einem Stützrohr 16 angeordnet. Das Stützrohr dichtet das Rundfilterelement 14 über eine zusätzliche Dichtung 17 an einem nach innen geführten Stutzen 18 des Reinluftrohres 12 ab. Rechtsseitig ist das Rundfilterelement mit einer geschlossenen Endscheibe 19 versehen, die mittig ein Fixierungselement 20 aufweist, wobei dieses Fixierungselement 20 an der Gehäusestruktur des Gehäuses 10 aufliegt und damit das Rundfilterelement 14 in dem Gehäuse positioniert. Der Deckel 11 lässt sich nach oben schwenken und gibt den Innenraum des Filtergehäuses frei, um das Rundfilterelement 14 austauschen zu können. Das Rundfilterelement ist an seinem Außenumfang mit einem Vorvlies 21 zur Abscheidung von Grobpartikeln versehen. Dieses Vorvlies erstreckt sich über die gesamte Oberfläche des Rundfilterelementes 14.The in FIG. 1 shown in sectional view air filter consists of a housing 10, a lid 11 disposed on the housing and a arranged on the housing 10 clean air tube 12 and a in FIG. 2 Rohluftansaugrohr 13. Within the housing 10 is a round filter element 14, which consists of a zigzag folded filter medium 15. This filter medium 15 is arranged on a support tube 16. The support tube seals the round filter element 14 via an additional seal 17 on an inwardly guided nozzle 18 of the clean air tube 12. On the right side, the round filter element is provided with a closed end disk 19 which has a fixing element 20 in the center, this fixing element 20 resting on the housing structure of the housing 10 and thus positioning the round filter element 14 in the housing. The cover 11 can be pivoted upwards and releases the interior of the filter housing so that the round filter element 14 can be exchanged. The round filter element is on its outer periphery with a Vorvlies 21 for deposition provided by coarse particles. This pre-fleece extends over the entire surface of the round filter element 14.

Am Boden besitzt das Gehäuse einen Rahmen 22, der - wie in Figur 1 zu sehen - aus zwei Rahmenteilen 23, 24 und - wie in Figur 2 zu sehen - aus den Rahmenteilen 25, 26 besteht. Damit bildet der Rahmen eine Kammer 38 zwischen dem Gehäuseboden und dem Rundfilterelement 14, d.h. der Rahmen erstreckt sich bis zu dessen Vorvlies. Innerhalb des Rahmens sind zwei Schirmventile 27, 28 angeordnet, d.h. diese sind, wie weiter unten beschrieben, an dem Gehäuse bzw. der Gehäusestruktur eingeclipst.At the bottom, the housing has a frame 22, which - as in FIG. 1 to see - from two frame parts 23, 24 and - as in FIG. 2 to see - consists of the frame parts 25, 26. Thus, the frame forms a chamber 38 between the housing bottom and the round filter element 14, that is, the frame extends to its Vorvlies. Within the frame two umbrella valves 27, 28 are arranged, ie these are, as described below, clipped to the housing or the housing structure.

Sollten über das Rohluftansaugrohr 13 in Figur 2 gem. den Pfeilen 29 mit der zu reinigenden Rohluft auch Schnee oder Schneekristalle einströmen und sich diese auf dem Rundfilterelement 14 absetzen und damit die Luftdurchlässigkeit durch das Rundfilterelement erhöhen, wird innerhalb des Rahmens 22 gem. Figur 1 die Oberfläche des Rundfilterelementes 14 frei sein, so dass sich aufgrund eines erhöhten Unterdrucks innerhalb des Rundfilterelementes 14 die Schirmventile 27, 28 öffnen und Luft aus dem Bereich unterhalb des Gehäuses 10 zu dem Rundfilterelement 14 einströmen kann, dadurch wird die Brennkraftmaschine mit Luft versorgt. Gleichzeitig führt die Luft zu einem Erwärmen des Rundfilterelementes 14, damit wird auch der abgelagerte Schnee abtauen, so dass die gesamte Oberfläche des Rundfilterelementes 14 mit Ansaugluft beaufschlagt werden kann.Should be about the Rohluftansaugrohr 13 in FIG. 2 gem. The arrows 29 with the raw air to be cleaned and snow or snow crystals flow and these settle on the round filter element 14 and thus increase the air permeability through the round filter element is gem within the frame 22. FIG. 1 the surface of the round filter element 14 be free, so that open due to an increased negative pressure within the round filter element 14, the umbrella valves 27, 28 and air can flow from the area below the housing 10 to the round filter element 14, thereby the internal combustion engine is supplied with air. At the same time, the air leads to a heating of the round filter element 14, so that also the deposited snow will defrost, so that the entire surface of the round filter element 14 can be acted upon with intake air.

Selbstverständlich bezieht sich die Darstellung nicht nur auf ein Rundfilterelement, es besteht auch die Möglichkeit, Flachfilterelemente oder ähnliche Filter zu verwenden.Of course, the illustration does not only refer to a round filter element, it is also possible to use flat filter elements or similar filters.

Figur 3 zeigt ein Schirmventil von der Unterseite aus betrachtet. Das Schirmventil 27 liegt auf einem umlaufenden Steg 30 des Gehäuses 10 auf. Das Gehäuse selbst besitzt zum Tragen des Schirmventils vier Stege 31, 32, 33, 34, die in der Mitte mit einer Öse 35 verbunden sind. Innerhalb dieser Öse ist der Befestigungsstock 36 des Schirmventils 27 eingerastet. FIG. 3 shows an umbrella valve viewed from the bottom. The umbrella valve 27 rests on a circumferential web 30 of the housing 10. The housing itself has to support the umbrella valve four webs 31, 32, 33, 34, which are connected in the middle with an eyelet 35. Within this eyelet of the mounting pole 36 of the umbrella valve 27 is engaged.

Figur 4 zeigt das Schirmventil 27 in einer perspektivischen Ansicht. Die Befestigung über den Befestigungsstock 36 erfolgt durch eine Nut 37, die die Öse 35 aufnimmt. Das Schirmventil kann aus einem Fluorsilikon bestehen. Es kann selbstverständlich auch aus einem Elastomerwerkstoff bestehen. Je nach Öffnungsdruck ist das Schirmventil konstruktiv zu gestalten. Die innere Elastizität des Schirmventils sorgt für eine zuverlässige Funktionsweise desselben. FIG. 4 shows the umbrella valve 27 in a perspective view. The attachment via the attachment floor 36 is effected by a groove 37 which receives the eyelet 35. The umbrella valve may consist of a fluorosilicone. It can of course also consist of an elastomer material. Depending on the opening pressure, the umbrella valve must be designed constructively. The internal elasticity of the umbrella valve ensures a reliable operation of the same.

Claims (9)

Luftfilter für eine Brennkraftmaschine mit einer ersten Lufteinlassöffnung und einer zweiten Lufteinlassöffnung, die an einem Ventil gegenüber einer Umgebung geöffnet werden kann sowie einer Luftauslassöffnung, wobei zwischen den Lufteinlassöffnungen und der Luftauslassöffnung ein Filterelement angeordnet ist, dadurch gekennzeichnet, dass die erste Lufteinlassöffnung mit einem Ansaugrohr zum Ansaugen von Außenluft verbunden ist und die zweite Lufteinlassöffnung mit einem Schirmventil ausgestattet ist, welches die Lufteinlassöffnung verschließt oder öffnet, wobei sich das Schirmventil auf einem Dichtrand abstützt und aus einem Elastomermaterial besteht.An air filter for an internal combustion engine having a first air inlet opening and a second air inlet opening, which can be opened to a valve from an environment and an air outlet opening, wherein between the air inlet openings and the air outlet opening a filter element is arranged, characterized in that the first air inlet opening with an intake pipe to Suction of outside air is connected and the second air inlet opening is provided with an umbrella valve which closes or opens the air inlet opening, wherein the umbrella valve is supported on a sealing edge and consists of an elastomeric material. Luftfilter nach Anspruch 1, dadurch gekennzeichnet, dass das Schirmventil mit seinem stockförmigen Befestigungselement in die Wandung eines Gehäuses des Luftfilters eingeklipst ist.Air filter according to claim 1, characterized in that the umbrella valve is clipped with its stock-shaped fastening element in the wall of a housing of the air filter. Luftfilter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Bereich der zweiten Lufteinlassöffnung mit einem Rahmen versehen ist, wobei sich dieser Rahmen bis zu der Außenkontur des Luftfilterelementes erstreckt.Air filter according to claim 1 or 2, characterized in that the region of the second air inlet opening is provided with a frame, said frame extending to the outer contour of the air filter element. Luftfilter nach Anspruch 3, dadurch gekennzeichnet, dass innerhalb des Rahmens wenigstens ein weiteres Schirmventil angeordnet ist.Air filter according to claim 3, characterized in that within the frame at least one further umbrella valve is arranged. Luftfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die zweite Lufteinlassöffnung in einem Bereich angeordnet ist, der nahe einem beim Betrieb der Brennkraftmaschine warmen Bauteil liegt.Air filter according to one of the preceding claims, characterized in that the second air inlet opening is arranged in an area which is close to a warm during operation of the internal combustion engine component. Luftfilter nach Anspruch 5, dadurch gekennzeichnet, dass der Einlass der zweiten Lufteinlassöffnung mit einem Ansaugrohr versehen ist, welches sich bis zu dem warmen Bauteil erstreckt.Air filter according to claim 5, characterized in that the inlet of the second air inlet opening is provided with an intake pipe which extends to the warm component. Luftfilter nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass der Rahmen 10 bis 30 % der Außenfläche des Filterelementes derart einbezieht, dass die über das Schirmventil einströmende Luft über diese Fläche durch das Filterelement strömt und gereinigt wird.Air filter according to one of claims 3 to 6, characterized in that the frame 10 to 30% of the outer surface of the filter element in such a way that the inflowing over the umbrella valve air flows through this surface through the filter element and is cleaned. Luftfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass innerhalb des Rahmens an dem Gehäuse eine Öffnung nach außen zum Austragen von Flüssigkeit, insbesondere Wasser, vorgesehen ist.Air filter according to one of the preceding claims, characterized in that within the frame to the housing an opening to the outside for discharging liquid, in particular water, is provided. Luftfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Filterelement ein zickzackförmig gefaltetes und konzentrisch aufgebautes Rundfilterelement ist, welches insbesondere an seiner Oberfläche ein Vorvlies zur Grobabscheidung von Partikeln aufweist.Air filter according to one of the preceding claims, characterized in that the filter element is a zigzag folded and concentrically constructed round filter element, which has in particular on its surface a Vorvlies for coarse separation of particles.
EP10174131.2A 2009-10-05 2010-08-26 Air filter for combustion engine Withdrawn EP2305992A3 (en)

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DE102009048209A DE102009048209A1 (en) 2009-10-05 2009-10-05 Air filter for an internal combustion engine

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