EP1131550A1 - Air filter for filtering induced air for internal combustion engines of motor vehicles - Google Patents

Air filter for filtering induced air for internal combustion engines of motor vehicles

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Publication number
EP1131550A1
EP1131550A1 EP00974293A EP00974293A EP1131550A1 EP 1131550 A1 EP1131550 A1 EP 1131550A1 EP 00974293 A EP00974293 A EP 00974293A EP 00974293 A EP00974293 A EP 00974293A EP 1131550 A1 EP1131550 A1 EP 1131550A1
Authority
EP
European Patent Office
Prior art keywords
air
water
filter
filter housing
drain
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.)
Granted
Application number
EP00974293A
Other languages
German (de)
French (fr)
Other versions
EP1131550B1 (en
Inventor
Thomas Lenzing
Uwe Konzelmann
Waldemar Guenther
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1131550A1 publication Critical patent/EP1131550A1/en
Application granted granted Critical
Publication of EP1131550B1 publication Critical patent/EP1131550B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/09—Furnace gas scrubbers

Definitions

  • Air filter for filtering the intake air for internal combustion engines of motor vehicles
  • the invention relates to an air filter for filtering the intake air for internal combustion engines of motor vehicles of the type defined in the preamble of claim 1.
  • Such air filters such as those from Bosch
  • a device for separating the gaseous and liquid phase of a gas / oil mixture in a pipeline which has a housing inserted into the pipeline with an inlet and an outlet m, in which a water separator is arranged.
  • the water separator consisting of a perforated plate is inclined, i.e. at an acute angle to the axes of the inlet and outlet, the housing m aligns and divides a housing section connected to the inlet and a housing section connected to the outlet.
  • a liquid outlet is provided in the latter housing section, so that the liquid which separates out at the water separator can drain out of the housing.
  • the air filter according to the invention has the advantage that, on the one hand, water particles contained in the sucked-in air are precipitated on the water separator and settle on the bottom of the
  • the filter housing Store the filter housing and, on the other hand, the water that collects on the bottom of the filter housing is reliably discharged via the water drain even during operation of the internal combustion engine and does not accumulate in the flow dead spaces of the filter housing.
  • the filter mat in the filter housing becomes less moist and cannot move with it Vacuum moisture fully, so that secondary disturbances on the clean air side due to water passing through the soaked filter mat are avoided.
  • the required water level in the water outlet is realized in that a drain pipe is connected to an outlet opening in the filter housing, the course of which is formed as an annular loop or a meandering loop in the manner of a water seal.
  • the drain pipe is preferably designed as a hose.
  • the means for forming the water level have a drain pipe which continues from a drain opening in the filter housing and is filled with absorbent material.
  • a similar suction effect is also achieved by a large surface roughness of the inner pipe wall of the drain pipe or by providing a constriction in the course of the drain pipe.
  • FIG. 1 shows a longitudinal section of an air filter for the intake tract of an internal combustion engine
  • FIG. 2 shows a partial side view of the lower region of the air filter in FIG. 1 according to a second exemplary embodiment
  • FIG. 3 shows a section of a longitudinal section of the lower region of the air filter in FIG. 1 according to further exemplary embodiments.
  • the air filter shown schematically in longitudinal section in FIG. 1 for filtering the intake air of an internal combustion engine in a motor vehicle has a filter housing 10 with an air inlet 11 and an air outlet 12 and an interchangeable filter mat 13 arranged between air inlet and outlet 11, 12.
  • the air inlet 11 is with an air intake 14 and the air outlet 12 is provided with a connector 15 which is connected to the intake pipe of the internal combustion engine after installation of the filter housing 10 in the motor vehicle.
  • the filter mat 13 is aligned horizontally, for example, and divides the interior of the filter housing 10 into a lower housing space 16, in the upper region of which the air inlet 11 is located, and into an upper housing space 17, in which the air outlet 12 opens.
  • the housing base 101 of the filter housing 10 is funnel-shaped and is provided with a water drain 18 at its lowest point.
  • the upstream is the upstream
  • a water separator 19 is arranged.
  • the water separator 19 is inclined at an acute angle to the axis of the air inlet 11 and separates from the lower housing space 16 a front region 20 in which both the air inlet 11 and the
  • Water drain 18 is.
  • the water separator 19 is designed as a grid, for example made of rust-free knitting metal, the grid mesh or honeycomb having a size of, for example, approximately 0.8 ⁇ 1.6 mm.
  • the filter housing 10 When driving, there is a negative pressure in the filter housing 10, which means that the water which has precipitated from the air stream and collects on the housing base 101 cannot or only poorly runs off via the water outlet 18.
  • This allows the filter mat 13 to soak up water, and, after its storage capacity has been exhausted, water penetrates through the filter mat 13 and reaches the intake tract on the clean air side Internal combustion engine in which faults can occur on the sensors located there due to the water.
  • means are arranged in the water outlet 18 which form a water level in the water outlet 18 of such a height that the negative pressure acting on the water outlet 18 is compensated.
  • These means can be implemented in various ways, in all cases the water drain 18 being provided with a drain pipe 21 which continues on the underside of the filter housing 10 and which surrounds a drain opening 22 in the housing base 101.
  • the means for water level formation are realized by a loop 24 which is formed in the course of the drain pipe 21, which is preferably designed as a hose.
  • this loop 24 there is always a water column 23 (marked by dashed lines in FIG. 2) which, with a corresponding design of the loop 24, affects the negative pressure prevailing in the filter housing 10
  • the drain pipe 21 can also be provided with a meandering loop 25 (FIG. 2) in that the drain pipe 21 is bent twice through 180 °.
  • the height of the loop 25 defines the height of the water column 23 which is always present in the drain pipe 21 in order to compensate for the negative pressure in the filter housing 10.
  • the drain pipe 21 is provided with a constriction 26 of its inside diameter in a pipe section facing away from the drain opening 22.
  • the same effect of the self-building water level due to increasing water entry into the air filter when driving is achieved with the execution of the drain pipe 21 according to FIG. 4.
  • the inner pipe wall of the drain pipe 21 is provided with a considerable surface roughness 27.
  • the mechanism of absorbency is used to generate the required water level during driving.
  • the means are realized here by an absorbent material 28 with which the drain pipe 21 is filled.
  • Such an absorbent material can be a sponge or a textile wick.
  • the drain pipe 21 can be designed as a hose.

Landscapes

  • 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)
  • Exhaust Silencers (AREA)
  • Filtering Materials (AREA)

Abstract

The invention relates to an air filter for filtering induced air for internal combustion engines. Said air filter comprises a filter housing (10) which has an air inlet and outlet (11, 12) and at least one water run-off (18), said water run-off being located on the housing floor (101); and a replaceable filter mat (13) which is situated in the filter housing (10) between the air inlet and the air outlet (11, 12). According to the invention, a water separator (19) is located in the filter housing (10), upstream of the filter mat (13), and means for forming a water level (23) in the water run-off (18) at a height that will compensate the negative pressure acting on said water run-off in the filter housing (10) are provided in the at least one water run-off (18). This ensures that water particles are separated from the induced air and that the water that is separated is optimally discharged from the filter housing (10).

Description

Luftfilter zur Filterung der Ansaugluft für Brennkraftmaschinen von KraftfahrzeugenAir filter for filtering the intake air for internal combustion engines of motor vehicles
Stand der TechnikState of the art
Die Erfindung betrifft einen Luftfilter zur Filterung der Ansaugluft für Brennkraftmaschinen von Kraftfahrzeugen der im Oberbegriff des Anspruchs 1 definierten Gattung.The invention relates to an air filter for filtering the intake air for internal combustion engines of motor vehicles of the type defined in the preamble of claim 1.
Solche Luftfilter, wie sie beispielsweise aus BoschSuch air filters, such as those from Bosch
"Kraftfahrtechnisches Taschenbuch", 1998, Seite 422 ff. bekannt sind, halten den in der Ansaugluft der Brennkraftmaschine enthaltenen Staub fern und verhindern einen verfrühten Verschleiß der Brennkraftmaschine. Die den Staub zurückhaltende, in Wartungsintervallen auszutauschende Filtermatte ist dabei auf die Brennkraftmaschine abgestimmt, um Leistung, Kraftstoffverbrauch und Dampfung des Ansauggerausch.es zu optimieren. Zum Abfuhren von im Filtergehause sich bildenden Kondenswasser sind im Boden des Filtergehauses mehrere Abiaufbohrungen vorgesehen."Automotive paperback", 1998, page 422 ff. Are known, keep the dust contained in the intake air of the engine away and prevent premature wear of the engine. The filter mat that retains dust and can be replaced at maintenance intervals is tailored to the internal combustion engine, to optimize performance, fuel consumption and damping of intake noise. A number of drain holes are provided in the bottom of the filter housing for removing condensate that forms in the filter housing.
Aus der US 5 507 858 ist eine Vorrichtung zur Trennung der gasformigen und flussigen Phase eines Gas-/01gemιsches m einer Pipeline bekannt, die ein mit einem Zulauf und einem Ablauf m die Pipeline eingesetztes Gehäuse aufweist, m dem ein Wasserabscheider angeordnet ist. Der aus einer Lochplatte bestehende Wasserabscheider ist schräg, d.h. unter einem spitzen Winkel zu den Achsen von Zu- und Ablauf, ausgerichtet und unterteilt das Gehäuse m einen mit dem Zulauf verbundenen Gehauseabschnitt und einen mit dem Ablauf verbundenen Gehauseabschnitt. Im letzteren Gehauseabschnitt ist ein Flussigkeitsauslaß vorgesehen, so daß die am Wasserabscheider sich absondernde Flüssigkeit aus dem Gehäuse ablaufen kann.From US 5 507 858 a device for separating the gaseous and liquid phase of a gas / oil mixture in a pipeline is known, which has a housing inserted into the pipeline with an inlet and an outlet m, in which a water separator is arranged. The water separator consisting of a perforated plate is inclined, i.e. at an acute angle to the axes of the inlet and outlet, the housing m aligns and divides a housing section connected to the inlet and a housing section connected to the outlet. A liquid outlet is provided in the latter housing section, so that the liquid which separates out at the water separator can drain out of the housing.
Vorteile der ErfindungAdvantages of the invention
Der erfmdungsgemaße Luftfilter mit den Merkmalen des Anspruchs 1 hat den Vorteil, daß einerseits m der angesaugten Luft enthaltene Wasserpartikel am Wasserabscheider ausgefallt werden und sich am Boden desThe air filter according to the invention has the advantage that, on the one hand, water particles contained in the sucked-in air are precipitated on the water separator and settle on the bottom of the
Filtergehauses ablagern und andererseits das sich am Boden des Filtergehauses ansammelnde Wasser auch im Betrieb der Brennkraftmaschine über den Wasserablauf zuverlässig abgeführt wird und sich nicht m Stromungstotraumen des Filtergehauses ansammelt. Dadurch wird die Filtermatte im Filtergehause weniger feucht und kann sich nicht mit Feuchtigkeit voll saugen, so daß Sekundarstorungen auf der Reinluftseite infolge von durch die vollgesaugte Filtermatte hindurchtretendem Wasser vermieden werden.Store the filter housing and, on the other hand, the water that collects on the bottom of the filter housing is reliably discharged via the water drain even during operation of the internal combustion engine and does not accumulate in the flow dead spaces of the filter housing. As a result, the filter mat in the filter housing becomes less moist and cannot move with it Vacuum moisture fully, so that secondary disturbances on the clean air side due to water passing through the soaked filter mat are avoided.
Durch die m den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Luftfilters möglich.Advantageous developments and improvements of the air filter specified in claim 1 are possible through the measures listed in the further claims.
Gemäß einer vorteilhaften Ausfuhrungsform der Erfindung wird der erforderliche Wasserfuhlstand im Wasserablauf dadurch realisiert, daß an einer Ablaufoffnung im Filtergehause sich ein Ablaufrohr anschließt, m dessen Verlauf eine ringförmige Schlaufe oder eine maanderformige Schleife nach Art eines Wasserverschlusses ausgebildet ist. Das Ablaufröhr wird dabei vorzugsweise als Schlauch ausgeführt.According to an advantageous embodiment of the invention, the required water level in the water outlet is realized in that a drain pipe is connected to an outlet opening in the filter housing, the course of which is formed as an annular loop or a meandering loop in the manner of a water seal. The drain pipe is preferably designed as a hose.
Gemäß einer bevorzugten Ausfuhrungsform der Erfindung weisen die Mittel zur Wasserfullstandsausbildung ein von einer Ablaufoffnung im Filtergehause sich fortsetzendes Ablaufrohr auf, das mit saugfahigem Material ausgefüllt ist. Ein gleichartiger Saugeffekt wird auch durch eine große Oberflachenrauhigkeit der Innenrohrwand des Ablaufrohrs oder durch Vorsehen einer Verengung im Verlauf des Ablaufrohrs erzielt .According to a preferred embodiment of the invention, the means for forming the water level have a drain pipe which continues from a drain opening in the filter housing and is filled with absorbent material. A similar suction effect is also achieved by a large surface roughness of the inner pipe wall of the drain pipe or by providing a constriction in the course of the drain pipe.
Alle diese vorstehend ausgeführten Ausfuhrungs arianten haben den Vorteil, daß unterhalb des Filtergehauses weniger Bauraum für die Unterbringung des Ablaufrohrs erforderlich ist als dies bei der Ausbildung einer Schlaufe oder Schleife in dem Ablaufröhr der Fall ist. Außerdem ist m Ablaufröhr keine standige Wasservorlage vorhanden, die im Winter einfrieren kann, vielmehr wird der Wasserfüllstand erst im Betrieb der Brennkraftmaschine durch den Mechanismus der Saugfähigkeit auf die erforderliche Höhe aufgebaut. Versuche haben ergeben, daß unabhängig davon, sich eine verbesserte Wasserabscheidung ergibt.All of the above-mentioned embodiments have the advantage that less space is required below the filter housing for accommodating the drain pipe than is the case with the formation of a loop or loop in the drain pipe. In addition, there is no constant water supply in the drain pipe that freezes in winter can, rather, the water level is only built up to the required level by the mechanism of absorbency during operation of the internal combustion engine. Experiments have shown that regardless of this, there is an improved water separation.
Zeichnungdrawing
Die Erfindung ist anhand von in der Zeichnung dargestellten Ausführungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen jeweils in schematischer Darstellung:The invention is explained in more detail in the following description with reference to exemplary embodiments shown in the drawing. Each shows in a schematic representation:
Fig. 1 einen Längsschnitt eines Luftfilters für den Ansaugtrakt einer Brennkraftmaschine,1 shows a longitudinal section of an air filter for the intake tract of an internal combustion engine,
Fig. 2 ausschnittweise eine Seitenansicht des unteren Bereichs des Luftfilters in Fig. 1 gemäß einem zweiten Ausführungsbeispiel,2 shows a partial side view of the lower region of the air filter in FIG. 1 according to a second exemplary embodiment,
Fig. 3 jeweils ausschnittweise einen Längsschnitt des bis 5 unteren Bereichs des Luftfilters in Fig. 1 gemäß weiterer Ausführungsbeispiele.3 shows a section of a longitudinal section of the lower region of the air filter in FIG. 1 according to further exemplary embodiments.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Der in Fig. 1 schematisch im Längsschnitt dargestellte Luftfilter zur Filterung der Ansaugluft einer Brennkraftmaschine in einem Kraftfahrzeug weist ein Filtergehäuse 10 mit einem Lufteinlaß 11 und einem Luftauslaß 12 und eine zwischen Luftein- und -auslaß 11,12 angeordnete, austauschbare Filtermatte 13 auf. Der Lufteinlaß 11 ist mit einem Luftansaugstutzen 14 und der Luftauslaß 12 mit einem Anschlußstutzen 15 versehen, der nach Einbau des Filtergehäuses 10 in das Kraftfahrzeug mit dem Ansaugrohr der Brennkraftmaschine verbunden wird. In Einbaulage ist die Filtermatte 13 beispielsweise horizontal ausgerichtet und unterteilt den Innenraum des Filtergehäuses 10 in einen unteren Gehäuseraum 16, in dessen oberem Bereich der Lufteinlaß 11 liegt, und in einen oberen Gehäuseraum 17, in dem der Luftauslaß 12 mündet. Der Gehäuseboden 101 des Filtergehäuses 10 ist trichterförmig ausgebildet und an seiner tiefsten Stelle mit einem Wasserablauf 18 versehen.The air filter shown schematically in longitudinal section in FIG. 1 for filtering the intake air of an internal combustion engine in a motor vehicle has a filter housing 10 with an air inlet 11 and an air outlet 12 and an interchangeable filter mat 13 arranged between air inlet and outlet 11, 12. The air inlet 11 is with an air intake 14 and the air outlet 12 is provided with a connector 15 which is connected to the intake pipe of the internal combustion engine after installation of the filter housing 10 in the motor vehicle. In the installed position, the filter mat 13 is aligned horizontally, for example, and divides the interior of the filter housing 10 into a lower housing space 16, in the upper region of which the air inlet 11 is located, and into an upper housing space 17, in which the air outlet 12 opens. The housing base 101 of the filter housing 10 is funnel-shaped and is provided with a water drain 18 at its lowest point.
Zur verbesserten Wasserabscheidung aus der über den Lufteinlaß 11 eintretenden, mit Feuchtigkeit oder Wassertropfen beladenen Luft ist stromaufwärts derFor improved water separation from the air entering via the air inlet 11 and loaded with moisture or water drops, the upstream is the
Filtermatte 13 ein Wasserabscheider 19 angeordnet. Der Wasserabscheider 19 ist dabei unter einem spitzen Winkel geneigt zur Achse des Lufteinlasses 11 ausgerichtet und trennt von dem unteren Gehäuseraum 16 einen vorderen Bereich 20 ab, in dem sowohl der Lufteinlaß 11 als auch derFilter mat 13 a water separator 19 is arranged. The water separator 19 is inclined at an acute angle to the axis of the air inlet 11 and separates from the lower housing space 16 a front region 20 in which both the air inlet 11 and the
Wasserablauf 18 liegt. Der Wasserabscheider 19 wird als Gitter z.B. aus nicht rostendem Strickmetall ausgeführt, wobei die Gittermaschen oder -waben eine Größe von z.B. etwa 0,8 x 1,6 mm aufweisen. Im Fahrbetrieb herrscht im Filtergehäuse 10 ein Unterdruck, der das aus dem Luftström ausgefällte und am Gehäuseboden 101 sich ansammelnde Wasser nicht oder nur schlecht über den Wasserablauf 18 ablaufen läßt. Dadurch kann sich die Filtermatte 13 mit Wasser vollsaugen, und, nachdem ihre Speicherfähigkeit erschöpft ist, dringt Wasser durch die Filtermatte 13 hindurch und gelangt in den reinluftseitigen Ansaugtrakt der Brennkraftmaschine, in dem durch das Wasser Störungen an dort befindlichen Sensoren auftreten können. Um dieses zu vermeiden, sind im Wasserablauf 18 Mittel angeordnet, die im Wasserablauf 18 einen Wasserfüllstand von einer solchen Höhe ausbilden, daß der auf den Wasserablauf 18 wirkende Unterdruck kompensiert ist. Diese Mittel können in verschiedener Weise realisiert werden, wobei in allen Fällen der Wasserablauf 18 mit einem an der Unterseite des Filtergehauses 10 sich fortsetzenden Ablaufrohr 21 versehen ist, das eine Ablauföffnung 22 im Gehäuseboden 101 umschließt .Water drain 18 is. The water separator 19 is designed as a grid, for example made of rust-free knitting metal, the grid mesh or honeycomb having a size of, for example, approximately 0.8 × 1.6 mm. When driving, there is a negative pressure in the filter housing 10, which means that the water which has precipitated from the air stream and collects on the housing base 101 cannot or only poorly runs off via the water outlet 18. This allows the filter mat 13 to soak up water, and, after its storage capacity has been exhausted, water penetrates through the filter mat 13 and reaches the intake tract on the clean air side Internal combustion engine in which faults can occur on the sensors located there due to the water. To avoid this, means are arranged in the water outlet 18 which form a water level in the water outlet 18 of such a height that the negative pressure acting on the water outlet 18 is compensated. These means can be implemented in various ways, in all cases the water drain 18 being provided with a drain pipe 21 which continues on the underside of the filter housing 10 and which surrounds a drain opening 22 in the housing base 101.
Bei dem in Fig. 1 dargestellten Luftfilter sind die Mittel zur Wasserfullstandsausbildung durch eine Schlaufe 24 realisiert, die im Verlauf des vorzugsweise als Schlauch ausgeführten Ablaufrohrs 21 ausgebildet ist. In dieser Schlaufe 24 ist immer eine Wassersäule 23 (in Fig. 2 durch Strichelung markiert) vorhanden, die bei entsprechender Ausbildung der Schlaufe 24 den im Filtergehäuse 10 herrschenden Unterdruck in seiner Wirkung auf denIn the air filter shown in Fig. 1, the means for water level formation are realized by a loop 24 which is formed in the course of the drain pipe 21, which is preferably designed as a hose. In this loop 24 there is always a water column 23 (marked by dashed lines in FIG. 2) which, with a corresponding design of the loop 24, affects the negative pressure prevailing in the filter housing 10
Wasserablauf 18 neutralisiert. Anstelle der Schlaufe 24 kann das Ablaufrohr 21 auch mit einer mäanderförmigen Schleife 25 (Fig. 2) versehen werden, indem das Ablaufröhr 21 zweimal um 180° umgebogen wird. Die Höhe der Schleife 25 legt die Höhe der im Ablaufrohr 21 stets vorhandenen Wassersäule 23 fest, um den Unterdruck im Filtergehäuse 10 zu kompensieren.Water outlet 18 neutralized. Instead of the loop 24, the drain pipe 21 can also be provided with a meandering loop 25 (FIG. 2) in that the drain pipe 21 is bent twice through 180 °. The height of the loop 25 defines the height of the water column 23 which is always present in the drain pipe 21 in order to compensate for the negative pressure in the filter housing 10.
Im Ausführungsbeispiel der Fig. 3 ist das Ablaufröhr 21 in einem von der Ablauföffnung 22 abgekehrten Rohrabschnitt mit einer Verengung 26 seines lichten Durchmessers versehen.In the embodiment of FIG. 3, the drain pipe 21 is provided with a constriction 26 of its inside diameter in a pipe section facing away from the drain opening 22.
Infolge der Verengung 26 baut sich der für die Kompensation des Unterdrucks im Filtergehäuse 10 erforderliche Wasserfüllstand im Ablaufrohr 21 erst im Laufe des Fahrbetriebs selbsttätig auf. Bei abgestellter Brennkraftmaschine und damit in Wegfall kommendem Unterdruck läuft das Wasser vollständig aus dem Filtergehäuse 10 ab, so daß im Winter ein Einfrieren des Wasserablaufs 18 vermieden wird.As a result of the narrowing 26, that for the compensation builds up of the negative pressure in the filter housing 10 required water level in the drain pipe 21 only automatically in the course of driving. When the internal combustion engine is switched off and the underpressure that is no longer present, the water runs completely out of the filter housing 10, so that freezing of the water outlet 18 is avoided in winter.
Der gleiche Effekt des sich selbstätig aufbauenden Wasserfüllstands durch zunehmenden Wassereintrag in den Luftfilter im Fahrbetrieb wird mit der Ausführung des Ablaufrohrs 21 gemäß Fig. 4 erreicht. Hier ist die Innenrohrwand des Ablaufrohrs 21 mit einer erheblichen Oberflächenrauhigkeit 27 versehen.The same effect of the self-building water level due to increasing water entry into the air filter when driving is achieved with the execution of the drain pipe 21 according to FIG. 4. Here, the inner pipe wall of the drain pipe 21 is provided with a considerable surface roughness 27.
Bei dem in Fig. 5 dargestellten Mitteln zur Wasserfullstandsausbildung nutzt man zur Erzeugung des erforderlichen Wasserfüllstands während des Fahrbetriebs den Mechanismus der Saugfähigkeit. Die Mittel werden hier durch ein saugfähiges Material 28 realisiert, mit dem das Ablaufröhr 21 ausgefüllt ist. Ein solches saugfähiges Material kann ein Schwamm oder ein textiler Docht sein.In the means for water level training shown in FIG. 5, the mechanism of absorbency is used to generate the required water level during driving. The means are realized here by an absorbent material 28 with which the drain pipe 21 is filled. Such an absorbent material can be a sponge or a textile wick.
In allen Ausführungsbeispielen gemäß Fig. 2 - 5 kann das Ablaufrohr 21 als Schlauch ausgeführt werden. In all of the exemplary embodiments according to FIGS. 2-5, the drain pipe 21 can be designed as a hose.

Claims

Ansprüche Expectations
1. Luftfilter zur Filterung der Ansaugluft für1. Air filter for filtering the intake air for
Brennkraftmaschinen von Kraftfahrzeugen, mit einem Filtergeh use (10), das einen mit einem Ansaugstutzen (14) verbundenen Lufteinlaß (11) und einen mit einem Ansaugrohr der Brennkraftmaschine verbindbaren Luftauslaß (12) sowie mindestens einen am Gehäuseboden (101) angeordneten Wasserablauf (18) aufweist, und mit einer im Filtergehäuse (10) zwischen Luftein- undInternal combustion engines of motor vehicles, with a filter housing (10) which has an air inlet (11) connected to an intake port (14) and an air outlet (12) connectable to an intake pipe of the internal combustion engine, and at least one water drain (18) arranged on the housing base (101) has, and with one in the filter housing (10) between the air inlet and
-auslaß (11,12) angeordneten, austauschbaren Filtermatte (13) , dadurch gekennzeichnet, daß im Filtergehause (10) stromaufwärts der Filtermatte (13) ein Wasserabscheider (19) angeordnet ist und in dem mindestens einen Wasserablauf (18) Mittel vorgesehen sind, die im-exchangeable filter mat (13) arranged outlet (11, 12), characterized in that a water separator (19) is arranged in the filter housing (10) upstream of the filter mat (13) and in which at least one water drain (18) is provided, the in
Wasserablauf (18) einen Wasserfüllstand (23) von einer solchen Höhe ausbilden, daß der im Filtergehäuse (10) auf den Wasserablauf (18) wirkende Unterdruck kompensiert ist.Water drain (18) a water level (23) from one Form such a height that the negative pressure acting on the water outlet (18) in the filter housing (10) is compensated.
2. Luftfilter nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Wasserfullstandsausbildung ein von einer Ablauföffnung (22) im Filtergehäuse (10) sich fortsetzendes Ablaufrohr (21) aufweisen, in dessen Verlauf eine Schlaufe (24) oder eine maanderformige Schleife (25) ausgebildet ist.2. Air filter according to claim 1, characterized in that the means for water level formation have a drain pipe (21) continuing from a drain opening (22) in the filter housing (10), in the course of which a loop (24) or a meandering loop (25) is trained.
3. Luftfilter nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Wasserfullstandsausbildung ein von einer Ablauföffnung (22) im Filtergehäuse (10) sich fortsetzendes Ablaufrohr (21) aufweisen, das in einem von der Ablaufoffnung (22) abgekehrten Rohrabschnitt mit einer Verengung (26) seines lichten Durchmessers versehen ist.3. Air filter according to claim 1, characterized in that the means for water level formation have a drain pipe (21) which continues from a drain opening (22) in the filter housing (10) and which in a pipe section facing away from the drain opening (22) has a constriction ( 26) its clear diameter is provided.
4. Luftfilter nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Wasserfullstandsausbildung ein von einer Ablauföffnung (22) im Filtergehäuse (10) sich fortsetzendes Ablaufrohr (21) aufweisen, das auf der Innenseite eine große Oberflächenrauhigkeit (27) aufweist.4. Air filter according to claim 1, characterized in that the means for water level formation have a drain pipe (21) which continues from a drain opening (22) in the filter housing (10) and has a large surface roughness (27) on the inside.
5. Luftfilter nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Wasserfullstandsausbildung ein von einer Ablauföffnung (22) im Filtergehäuse (10) sich fortsetzendes Ablaufrohr (21) aufweisen, das in seinem hohlen Innern mit einem saugfähigen Material (28) ausgefüllt ist.5. Air filter according to claim 1, characterized in that the means for water level training have a drain pipe (21) which continues in an outlet opening (22) in the filter housing (10), which in its hollow interior is filled with an absorbent material (28).
6. Luftfilter nach Anspruch 5, dadurch gekennzeichnet, daß als saugfähiges Material ein Schwamm oder ein textiler6. Air filter according to claim 5, characterized in that a sponge or a textile as the absorbent material
Docht eingesetzt ist.Wick is inserted.
7. Luftfilter nach einem der Ansprüche 2 - 6, dadurch gekennzeichnet, daß das Ablaufrohr (21) als Schlauch ausgebildet ist.7. Air filter according to one of claims 2-6, characterized in that the drain pipe (21) is designed as a hose.
8. Luftfilter nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, daß der Wasserabscheider (19) unter einem spitzen Winkel geneigt zur Achse des Lufteinlasses (11) des Filtergehäuses (10) angeordnet ist und von dem unterhalb der Filtermatte (13) liegenden Innenraum (16) des Filtergehäuses (10) einen vorderen Bereich (20) abtrennt, in dem der Lufteinlaß (11) und der Wasserablauf (18) angeordnet sind.8. Air filter according to one of claims 1-7, characterized in that the water separator (19) is inclined at an acute angle to the axis of the air inlet (11) of the filter housing (10) and from the interior below the filter mat (13) (16) of the filter housing (10) separates a front area (20) in which the air inlet (11) and the water outlet (18) are arranged.
9. Luftfilter nach einem der Ansprüche 1 - 8, dadurch gekennzeichnet, daß der Wasserabscheider (19) als Gitter, vorzugsweise aus nicht rostendem Strickmetall, ausgebildet ist.9. Air filter according to one of claims 1-8, characterized in that the water separator (19) is designed as a grid, preferably made of rust-free knitting metal.
10. Filter nach Anspruch 9, dadurch gekennzeichnet, daß die Gittermaschen oder -waben eine Größe von etwa10. Filter according to claim 9, characterized in that the grid mesh or honeycomb has a size of about
0,8 x 1,6 mm aufweisen. 0.8 x 1.6 mm.
EP00974293A 1999-09-07 2000-09-05 Air filter for filtering induced air for internal combustion engines of motor vehicles Expired - Lifetime EP1131550B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19942503 1999-09-07
DE19942503A DE19942503A1 (en) 1999-09-07 1999-09-07 Air filter for filtering the intake air for internal combustion engines of motor vehicles
PCT/DE2000/003043 WO2001018379A1 (en) 1999-09-07 2000-09-05 Air filter for filtering induced air for internal combustion engines of motor vehicles

Publications (2)

Publication Number Publication Date
EP1131550A1 true EP1131550A1 (en) 2001-09-12
EP1131550B1 EP1131550B1 (en) 2005-02-02

Family

ID=7920986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00974293A Expired - Lifetime EP1131550B1 (en) 1999-09-07 2000-09-05 Air filter for filtering induced air for internal combustion engines of motor vehicles

Country Status (6)

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US (1) US6521008B1 (en)
EP (1) EP1131550B1 (en)
JP (1) JP2003508678A (en)
KR (1) KR20010080949A (en)
DE (2) DE19942503A1 (en)
WO (1) WO2001018379A1 (en)

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Also Published As

Publication number Publication date
US6521008B1 (en) 2003-02-18
DE50009417D1 (en) 2005-03-10
KR20010080949A (en) 2001-08-25
DE19942503A1 (en) 2001-03-08
WO2001018379A1 (en) 2001-03-15
EP1131550B1 (en) 2005-02-02
JP2003508678A (en) 2003-03-04

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