EP0804682B1 - Inlet device for an internal combustion engine - Google Patents

Inlet device for an internal combustion engine Download PDF

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Publication number
EP0804682B1
EP0804682B1 EP96900589A EP96900589A EP0804682B1 EP 0804682 B1 EP0804682 B1 EP 0804682B1 EP 96900589 A EP96900589 A EP 96900589A EP 96900589 A EP96900589 A EP 96900589A EP 0804682 B1 EP0804682 B1 EP 0804682B1
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EP
European Patent Office
Prior art keywords
inlet
inner pipe
inlet device
sealing lip
aperture
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
EP96900589A
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German (de)
French (fr)
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EP0804682A1 (en
Inventor
Roland Loy
Heinz Andress
Heinz Müller
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Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
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Publication date
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Publication of EP0804682A1 publication Critical patent/EP0804682A1/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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10301—Flexible, resilient, pivotally or movable parts; Membranes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • 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
    • F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
    • 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
    • F02M35/1227—Flow throttling or guiding by using multiple air intake flow paths, e.g. bypass, honeycomb or pipes opening into an expansion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air

Definitions

  • the invention relates to a suction device for a Internal combustion engine according to the preamble of the main claim.
  • a controllable shut-off device is available.
  • the shut-off device is located in one between two intake ducts located cross channel and is controlled by commands control electronics opened or closed.
  • the Control commands are dependent on the speed of the internal combustion engine and the temperature of the outside air with a temperature sensor is determined.
  • Another suction device according to the preamble of claim 1 is from DE-A-1 928 925 known.
  • the invention has for its object a suction device for an internal combustion engine according to the generic term of the main claim to train that with simple means and adaptation without additional control devices the passage opening of the suction device to the Operating states of the internal combustion engine is possible.
  • the suction device according to the invention solves the posed Task with those specified in the indicator of the main claim Characteristics.
  • the suction device according to the invention is particularly advantageous in that in particular the noise emission of the Internal combustion engine through a simple speed-adapted Size of the passage opening for the suction Air volume is greatly reduced. Is optimal for each speed of the internal combustion engine a certain size the passage opening, being at low speeds small diameter for the lowest possible noise emission leads.
  • variable passage openings are simple realized by means of a passive flap mechanism that in the space fixed by web-like spacers is formed between the tubes. To open the Flap mechanism is sufficient here to increase the suction pressure, for example with an increase in the speed of the Internal combustion engine.
  • the flap mechanism is particularly advantageous according to one of claims 3 to 5 as an elastic sealing lip executed, which is held on one side and in movable part so movable away from the other tube surface is that they completely open the additional passage or partially releases.
  • This elastic sealing lip is preferably made of a temperature-stable elastic material, e.g. B. elastomer, TPE or the like, made, so that the opening behavior is largely independent of temperature is.
  • a temperature-stable elastic material e.g. B. elastomer, TPE or the like
  • the elastic Sealing lip additionally slotted at the free end, so that the free parts are even more mobile.
  • a possibly necessary Contact pressure of the free part on the other pipe can easily be made by a ring spring become.
  • the at least one inner tube is slightly longer than the outer tube and thus protrudes from the level of the entrance opening. To this This can create turbulence and a vacuum in the additional Passage can be largely avoided, which affect the suction behavior negatively.
  • FIG. 1 is a suction device 1 for one here Internal combustion engine, not shown, shown by the an air stream is drawn in according to arrow 2.
  • the suction device 1 has an inner tube 3, an outer tube 4 and web-like Spacer 5 between the tubes 3 and 4.
  • the Inner tube 3 is above the level of the inlet opening 6 extended by a predetermined amount.
  • Sealing lip 7 held, which is freely movable within limits Part 8 has.
  • the sealing lip 7 is with the free part 8 led obliquely backwards in the suction direction, so that at a certain increase in suction pressure the free part 8 of the sealing lip 7 moves away from the inner tube 3 and an additional passage for the Airflow releases.
  • Figure 2 is a section through the suction device according to Figure 1 shown, in particular the location of the web-like Spacer 5 between the tubes 3 and 4 illustrates.
  • Figure 3 shows a first embodiment of the sealing lip 7 with the movable free part 8 in detail, wherein in the right half of Figure 3 is a plan view of the sealing lip 7 is shown.
  • slots 9 are attached, one Support locomotion of the free legs of the sealing lip.
  • the number and size of the slots 9 will depend of the pressure conditions in the suction device or the operating conditions of the internal combustion engine or Elasticity of the sealing lip 7 selected.
  • Figure 5 are instead the slots 9 folds 10 attached, which are comparable Way as the slots 9 based on Figure 4 Support opening of sealing lip 7.
  • the embodiment of Figure 6 also assigns the slots 9 still an annular spring 11, which a predetermined Contact pressure of the sealing lip on the inner tube 3 causes. For certain applications, it is necessary a passively controlled opening behavior of the To ensure sealing lip 7, so only from one the spring action of the ring spring 11 predetermined suction pressure the additional passage opening is activated.
  • Figure 7 and Figure 8 each show another embodiment the sealing lip 7 with a belly-like extension of the free part 8, some of which is a certain Can have rigidity in a region 12.
  • the variation the passage opening also takes place here through the arrangement of slots 9 (FIG. 7) or by folding 10 (Figure 8).
  • Figure 9 shows an embodiment of a suction device 1 with a sealing lip 13 which is attached to the inner tube 3 is and rests with its movable part on the outer tube 4. Further arrangement options for the sealing lips 13 result from FIG. 10 (fastening in the area of the outlet opening 14 on the outer tube 4) and from FIG. 11 (Attachment in the area of the outlet opening 14 on the inner tube 3).
  • the constructive embodiments of the sealing lips 13 are adapted here to the respective applications and can be the one described in FIGS. 3 to 8 Use characteristics with regard to mobility.
  • FIG 12 Another design possibility of the inner tube 3 shows Figure 12, in which the inner tube 3 over the level of the outlet opening 14 is led around the fluidic to ensure the most favorable form when the air flow exits.
  • a dashed line 15 is also a shortened shape of the inner tube 3 indicated in the the inner tube ends in front of the outlet opening 14.

Abstract

The invention concerns an inlet device (1) for an internal combustion engine. The inlet device in question is provided with an at least partially variable through-aperture by which the inlet behaviour is matched to the operating condition of the engine. To achieve an optimal reduction in noise emission depending on the operating conditions of the engine, the inlet device (1) contains at least one inner pipe (3) and one outer pipe (4). The inlet air stream is drawn irrespective of prevailing operating conditions through the inner pipe (3) and a further air stream is drawn through an additional through-aperture whose size can be varied, between the inner pipe (3) and outer pipe (4). The additional through-aperture is provided with an elastic sealing lip (7, 13).

Description

Die Erfindung betrifft eine Ansaugvorrichtung für einen Verbrennungsmotor nach dem Oberbegriff des Hauptanspruchs.The invention relates to a suction device for a Internal combustion engine according to the preamble of the main claim.

Stand der TechnikState of the art

Es ist bereits eine Ansaugvorrichtung für einen Verbrennungsmotor aus der DE-OS 40 41 786 bekannt, bei der zur Variierung der Durchtrittsöffnung, durch die die angesaugte Luft strömt, ein steuerbares Absperrorgan vorhanden ist. Das Absperrorgan befindet sich in einem zwischen zwei Ansaugkanälen befindlichen Querkanal und wird durch Steuerbefehle einer Steuerelektronik geöffnet oder geschlossen. Die Steuerbefehle sind abhängig von der Drehzahl des Verbrennungsmotors und von der Temperatur der Außenluft, die mit einem Temperaturfühler ermittelt wird. Eine weitere Ansaugvorrichtung gemäß Oberbegriff von Anspruch 1 ist aus der DE-A-1 928 925 bekannt.It is already an intake device for an internal combustion engine known from DE-OS 40 41 786, in the Varying the passage opening through which the aspirated Air flows, a controllable shut-off device is available. The shut-off device is located in one between two intake ducts located cross channel and is controlled by commands control electronics opened or closed. The Control commands are dependent on the speed of the internal combustion engine and the temperature of the outside air with a temperature sensor is determined. Another suction device according to the preamble of claim 1 is from DE-A-1 928 925 known.

Der Erfindung liegt die Aufgabe zugrunde, eine Ansaugvorrichtung für einen Verbrennungsmotor nach dem Oberbegriff des Hauptanspruchs zu fortzubilden, daß mit einfachen Mitteln und ohne zusätzliche Steuervorrichtungen eine Anpassung der Durchtrittsöffnung der Ansaugvorrichtung an die Betriebszustände des Verbrennungsmotors möglich ist.The invention has for its object a suction device for an internal combustion engine according to the generic term of the main claim to train that with simple means and adaptation without additional control devices the passage opening of the suction device to the Operating states of the internal combustion engine is possible.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Ansaugvorrichtung löst die gestellte Aufgabe mit den im Kennzeichen des Hauptanspruchs angegebenen Merkmalen.The suction device according to the invention solves the posed Task with those specified in the indicator of the main claim Characteristics.

Besonders vorteilhaft ist die erfindungsgemäße Ansaugvorrichtung dadurch, daß besonders die Geräuschemission des Verbrennungsmotors durch eine auf einfache Weise drehzahlangepaßte Größe der Durchtrittsöffnung für das angesaugte Luftvolumen stark vermindert wird. Optimal ist für jede Drehzahl des Verbrennungsmotors eine bestimmte Größe der Durchtrittsöffnung, wobei bei niedrigen Drehzahlen ein kleiner Durchmesser zu einer möglichst geringen Geräuschemission führt.The suction device according to the invention is particularly advantageous in that in particular the noise emission of the Internal combustion engine through a simple speed-adapted Size of the passage opening for the suction Air volume is greatly reduced. Is optimal for each speed of the internal combustion engine a certain size the passage opening, being at low speeds small diameter for the lowest possible noise emission leads.

Gemäß der Erfindung ist bei kleineren Drehzahlen, bzw. bei einem geringen Ansaugvolumen nur das Innenrohr geöffnet und erst bei einer Erhöhung der Drehzahl oder einer Erhöhung des Ansaugvolumens wird eine zusätzliche, variabel erweiterbare, Durchtrittsöffnung zwischen dem Innenrohr und dem Außenrohr hinzugenommen. Bei einer Verwendung von mehreren Innenrohren können die variablen, zusätzlichen Durchtrittsöffnungen auch zwischen den weiteren Innenrohren angebracht werden. Die konstruktiven Ausgestaltungen der variablen Durchtrittsöffnungen, wie sie folgend beschrieben werden, sind hier jeweils in gleicher Weise anwendbar.According to the invention is at lower speeds, or at with a low intake volume only the inner tube is opened and only when the speed increases or increases of the intake volume is an additional, variably expandable, Passage opening between the inner tube and the Outer tube added. When using multiple Inner tubes can be the variable, additional passage openings also attached between the other inner tubes become. The constructive designs of the variable Through openings, as described below, are applicable here in the same way.

Die variablen Durchtrittsöffnungen sind auf einfache Weise mittels eines passiven Klappenmechanismus realisiert, der in dem durch stegartige Abstandhalter fixierten Zwischenraum zwischen den Rohren gebildet ist. Zur Öffnung des Klappenmechanismusses genügt hier die Erhöhung des Ansaugdrucks, beispielsweise bei einer Erhöhung der Drehzahl des Verbrennungsmotors.The variable passage openings are simple realized by means of a passive flap mechanism that in the space fixed by web-like spacers is formed between the tubes. To open the Flap mechanism is sufficient here to increase the suction pressure, for example with an increase in the speed of the Internal combustion engine.

In besonders vorteilhafter Weise ist der Klappenmechanismus nach einem der Ansprüche 3 bis 5 als eine elastische Dichtlippe ausgeführt, die jeweils einseitig gehalten ist und im beweglichen Teil derart von der anderen Rohrfläche wegbewegbar ist, daß sie die zusätzliche Durchtrittsöffnung ganz oder teilweise freigibt. Diese elastische Dichtlippe ist vorzugsweise aus einem temperaturstabilen elastischem Werkstoff, z. B. Elastomer, TPE oder ähnlichem, hergestellt, sodaß das Öffnungsverhalten weitgehend temperaturunabhängig ist. Hierbei sind die freien, beweglichen Teile der Dichtlippe möglichst lang ausgebildet um die Temperaturunabhängigkeit zu fördern.The flap mechanism is particularly advantageous according to one of claims 3 to 5 as an elastic sealing lip executed, which is held on one side and in movable part so movable away from the other tube surface is that they completely open the additional passage or partially releases. This elastic sealing lip is preferably made of a temperature-stable elastic material, e.g. B. elastomer, TPE or the like, made, so that the opening behavior is largely independent of temperature is. Here are the free, moving parts of the sealing lip trained as long as possible to be independent of temperature to promote.

Zur Verbesserung des Öffnungsverhaltens ist die elastische Dichtlippe am freien Ende zusätzlich geschlitzt, sodaß die freien Teile noch beweglicher sind. Ein eventuell notwendiger Anpreßdruck des freien Teils an das jeweils andere Rohr kann auf einfache Weise durch eine Ringfeder hergestellt werden.To improve the opening behavior is the elastic Sealing lip additionally slotted at the free end, so that the free parts are even more mobile. A possibly necessary Contact pressure of the free part on the other pipe can easily be made by a ring spring become.

Die weiter noch möglichen geometrischen Ausgestaltungen der elastischen Dichtlippe und die jeweils beste Anordnungentweder an der Eintrittsöffnung, an der Austrittsöffnung oder dazwischen - ergibt sich jeweils aus dem speziellen Anwendungsfall, der durch Bauart und/oder Einsatzbedingungen des Verbrennungsmotors bestimmt wird.The further possible geometrical configurations of the elastic sealing lip and the best arrangement either at the inlet opening, at the outlet opening or in between - each results from the special Use case that depends on the type and / or operating conditions of the internal combustion engine is determined.

Vorteilhaft ist weiterhin, wenn das mindestens eine Innenrohr etwas länger ist als das jeweils äußere Rohr und somit aus der Ebene der Eintrittsöffnung herausragt. Auf diese Weise können Turbulenzen und ein Unterdruck in der zusätzlichen Durchtrittsöffnung weitgehend vermieden werden, welche das Ansaugverhalten negativ beeinflussen.It is also advantageous if the at least one inner tube is slightly longer than the outer tube and thus protrudes from the level of the entrance opening. To this This can create turbulence and a vacuum in the additional Passage can be largely avoided, which affect the suction behavior negatively.

Zeichnungdrawing

Ausführungsbeispiele der erfindungsgemäßen Ansaugvorrichtung werden anhand der Zeichnung erläutert. Es zeigen:

  • Figur 1 eine Schnittdarstellung durch ein erstes Ausführungsbeispiel einer Ansaugvorrichtung mit einem Innen- und einem Außenrohr und einer elastischen Dichtlippe;
  • Figur 2 einen Schnitt durch die Ansaugvorrichtung nach Figur 1;
  • Figuren 3 bis 8 verschiedene Ausführungsformen der elastischen Dichtlippe;
  • Figuren 9 bis 11 verschiedene Anordnungsvarianten der elastischen Dichtlippe und
  • Figur 12 eine Ausführungsform der Ansaugvorrichtung mit unterschiedlichen Längen des Innenrohres an der Austrittsöffnung.
    • Embodiments of the suction device according to the invention are explained with reference to the drawing. Show it:
  • Figure 1 is a sectional view through a first embodiment of a suction device with an inner and an outer tube and an elastic sealing lip;
  • FIG. 2 shows a section through the suction device according to FIG. 1;
  • Figures 3 to 8 different embodiments of the elastic sealing lip;
  • Figures 9 to 11 different arrangement variants of the elastic sealing lip and
  • Figure 12 shows an embodiment of the suction device with different lengths of the inner tube at the outlet opening.

    • Beschreibung der AusführungsbeispieleDescription of the embodiments

    In Figur 1 ist eine Ansaugvorrichtung 1 für einen hier nicht dargestellten Verbrennungsmotor gezeigt, durch die ein Luftstrom gemäß Pfeil 2 angesaugt wird. Die Ansaugvorrichtung 1 weist ein Innenrohr 3, ein Außenrohr 4 und stegartige Abstandhalter 5 zwischen den Rohren 3 und 4 auf. Das Innenrohr 3 ist hierbei über die Ebene der Eintrittsöffnung 6 um einen vorgegebenen Betrag verlängert. Obwohl bei dieser und den folgenden Darstellungen nur ein Innenrohr 3 vorhanden ist, ist es prinzipiell möglich eine Mehrzahl von Innenrohren 3 vorzusehen, die mit den jeweils äußeren Rohren zusätzliche, variable Durchtrittsöffnungen gestalten. In Figure 1 is a suction device 1 for one here Internal combustion engine, not shown, shown by the an air stream is drawn in according to arrow 2. The suction device 1 has an inner tube 3, an outer tube 4 and web-like Spacer 5 between the tubes 3 and 4. The Inner tube 3 is above the level of the inlet opening 6 extended by a predetermined amount. Although with this and the following illustrations only an inner tube 3 is present, it is possible in principle a plurality of Provide inner tubes 3 with the respective outer tubes design additional, variable openings.

    An der Eintrittsöffnung 6 ist am Außenrohr 4 eine elastische Dichtlippe 7 gehalten, die einen in Grenzen frei beweglichen Teil 8 aufweist. Die Dichtlippe 7 ist mit dem freien Teil 8 in Ansaugrichtung schräg nach hinten geführt, sodaß bei einer bestimmten Erhöhung des Ansaugdrucks der freie Teil 8 der Dichtlippe 7 sich vom Innenrohr 3 wegbewegt und eine zusätzliche Durchtrittsöffnung für den Luftstrom freigibt.At the inlet opening 6 is an elastic on the outer tube 4 Sealing lip 7 held, which is freely movable within limits Part 8 has. The sealing lip 7 is with the free part 8 led obliquely backwards in the suction direction, so that at a certain increase in suction pressure the free part 8 of the sealing lip 7 moves away from the inner tube 3 and an additional passage for the Airflow releases.

    In Figur 2 ist ein Schnitt durch die Ansaugvorrichtung nach Figur 1 gezeigt, der insbesondere die Lage der stegartigen Abstandhalter 5 zwischen den Rohren 3 und 4 verdeutlicht.In Figure 2 is a section through the suction device according to Figure 1 shown, in particular the location of the web-like Spacer 5 between the tubes 3 and 4 illustrates.

    Figur 3 zeigt ein erstes Ausführungsbeispiel der Dichtlippe 7 mit dem beweglichen freien Teil 8 im Detail, wobei in der rechten Hälfte der Figur 3 eine Draufsicht auf die Dichtlippe 7 dargestellt ist.Figure 3 shows a first embodiment of the sealing lip 7 with the movable free part 8 in detail, wherein in the right half of Figure 3 is a plan view of the sealing lip 7 is shown.

    Um die Beweglichkeit des freien Teils 8 der Dichtlippe 7 zu erhöhen, sind gemäß Figur 4 Schlitze 9 angebracht, die eine Fortbewegung der freien Schenkel der Dichtlippe unterstützen. Die Anzahl und die Größe der Schlitze 9 wird in Abhängigkeit von den Druckverhältnissen in der Ansaugvorrichtung bzw. von den Einsatzbedingungen des Verbrennungsmotors oder Elastizität der Dichtlippe 7 gewählt. In Figur 5 sind anstatt der Schlitze 9 Falten 10 angebracht, die in vergleichbarer Weise wie die Schlitze 9 anhand der Figur 4 die Öffnung der Dichtlippe 7 unterstützen.To the mobility of the free part 8 of the sealing lip 7 increase, according to Figure 4 slots 9 are attached, one Support locomotion of the free legs of the sealing lip. The number and size of the slots 9 will depend of the pressure conditions in the suction device or the operating conditions of the internal combustion engine or Elasticity of the sealing lip 7 selected. In Figure 5 are instead the slots 9 folds 10 attached, which are comparable Way as the slots 9 based on Figure 4 Support opening of sealing lip 7.

    Das Ausführungsbeispiel nach Figur 6 weist zusätzlich zu den Schlitzen 9 noch eine Ringfeder 11 auf, die einen vorgegebenen Anpreßdruck der Dichtlippe an des Innenrohr 3 bewirkt. Für bestimmte Anwendungsfälle ist es erforderlich, ein gewissermaßen passiv gesteuertes Öffnungsverhalten der Dichtlippe 7 zu gewährleisten, damit erst ab einem durch die Federwirkung der Ringfeder 11 vorgegebenen Ansaugdruck die zusätzliche Durchtrittsöffnung aktiviert wird.The embodiment of Figure 6 also assigns the slots 9 still an annular spring 11, which a predetermined Contact pressure of the sealing lip on the inner tube 3 causes. For certain applications, it is necessary a passively controlled opening behavior of the To ensure sealing lip 7, so only from one the spring action of the ring spring 11 predetermined suction pressure the additional passage opening is activated.

    Figur 7 und Figur 8 zeigen jeweils ein weiteres Ausführungsbeispiel der Dichtlippe 7 mit einer bauchartigen Erweiterung des freien Teils 8, der zum Teil eine gewisse Steifigkeit in einem Bereich 12 aufweisen kann. Die Variierung der Durchtrittsöffnung erfolgt auch hier durch die Anordnung von Schlitzen 9 (Figur 7) oder durch Falten 10 (Figur 8).Figure 7 and Figure 8 each show another embodiment the sealing lip 7 with a belly-like extension of the free part 8, some of which is a certain Can have rigidity in a region 12. The variation the passage opening also takes place here through the arrangement of slots 9 (FIG. 7) or by folding 10 (Figure 8).

    Figur 9 zeigt ein Ausführungsbeispiel einer Ansaugvorrichtung 1 mit einer Dichtlippe 13, die am Innenrohr 3 befestigt ist und mit ihren beweglichen Teil am Außenrohr 4 anliegt. Weitere Anordnungsmöglichkeiten der Dichtlippen 13 ergeben sich aus Figur 10 ( Befestigung im Bereich der Austrittsöffnung 14 am Außenrohr 4) sowie aus Figur 11 (Befestigung im Bereich der Austrittsöffnung 14 am Innenrohr 3). Die konstruktiven Ausführungsformen der Dichtlippen 13 sind hier den jeweiligen Anwendungsfällen angepaßt und können sich dabei der in den Figuren 3 bis 8 beschriebenen Merkmale hinsichtlich der Bewegbarkeit bedienen.Figure 9 shows an embodiment of a suction device 1 with a sealing lip 13 which is attached to the inner tube 3 is and rests with its movable part on the outer tube 4. Further arrangement options for the sealing lips 13 result from FIG. 10 (fastening in the area of the outlet opening 14 on the outer tube 4) and from FIG. 11 (Attachment in the area of the outlet opening 14 on the inner tube 3). The constructive embodiments of the sealing lips 13 are adapted here to the respective applications and can be the one described in FIGS. 3 to 8 Use characteristics with regard to mobility.

    Eine weitere Gestaltungsmöglichkeit des Innenrohrs 3 zeigt Figur 12, bei der das Innenrohr 3 über die Ebene der Austrittsöffnung 14 hinausgeführt ist um die strömungstechnisch günstigste Form beim Austritt des Luftstroms zu gewährleisten. Anhand einer gestrichelten Linie 15 ist auch eine verkürzte Form des Innenrohrs 3 angedeutet, bei der das Innenrohr vor der Austrittsöffnung 14 endet. Die jeweils günstigste Gestaltung, besonders hinsichtlich der Geräuschemission, hängt hierbei insbesondere von der Bauart des die Ansaugluft benötigenden Verbrennungsmotors ab.Another design possibility of the inner tube 3 shows Figure 12, in which the inner tube 3 over the level of the outlet opening 14 is led around the fluidic to ensure the most favorable form when the air flow exits. Using a dashed line 15 is also a shortened shape of the inner tube 3 indicated in the the inner tube ends in front of the outlet opening 14. The each cheapest design, especially with regard to noise emission, depends in particular on the type of the internal combustion engine that requires the intake air.

    Claims (10)

    1. Inlet device for an internal combustion engine,
      including a through-aperture, which is at least partially variable, for adapting the inlet behaviour to the operating conditions of the internal combustion engine,
      characterised in that
      the inlet device (1) comprises at least one inner pipe (3), the outer surface of which is spaced in all directions from an outer pipe (4), the drawn-in air stream only passing through the inner pipe (3) in the operating condition with a small inlet volume and, if the inlet volume is increased, in addition to the air stream passing through the inner pipe (3), a further air stream passes through an additional through-aperture in the region between the respective inner pipe (3) and the outer pipe (4), which through-aperture is variable in respect of its size.
    2. Inlet device according to claim 1, characterised in that
      the region between the inner pipe (3) and the outer pipe (4) is fixed by means of rib-like spacer members (5), and a passive, flap-like mechanism is situated in this region, which mechanism causes this region to be variably opened for the drawn-in air stream if the inlet pressure is increased.
    3. Inlet device according to claim 2, characterised in that
      the flap-like mechanism is a resilient sealing lip (7), which is retained on the outer pipe (4) at the inlet aperture (6), and in that
      the resilient sealing lip (7) extends along the external surface of the inner pipe (3) inclinedly when viewed with respect to the inlet direction, the sealing lip (7) or parts thereof being displaceable away from the inner pipe (3), when viewed with respect to the inlet direction, so as to overcome an initial bias.
    4. Inlet device according to claim 2, characterised in that
      the flap-like mechanism is a resilient sealing lip (13), which is retained either on the outer pipe (4) or on the inner pipe (3) at the inlet aperture (6) or at the outlet aperture (14) of the inlet device (1), and in that
      the resilient sealing lip (13) abuts with its displaceable regions against the other respective pipe, the displaceable regions or parts thereof being displaceable away from the other respective pipe, when viewed with respect to the inlet direction, so as to overcome an initial bias.
    5. Inlet device according to claim 3, characterised in that
      the resilient sealing lip (7) has at least four slots (9) of a prescribed length, which extend from the inner pipe (3) radially to the outer pipe (4).
    6. Inlet device according to one of claims 3 or 5,
      characterised in that
      the resilient sealing lip (7) is pressed against the inner pipe (3) by an annular spring (11).
    7. Inlet device according to one of claims 3, 5 or 6,
      characterised in that
      the resilient sealing lip (7) is widened in a bulge-like manner, when viewed with respect to the inlet direction, and has regions of high rigidity.
    8. Inlet device according to one of the preceding claims, characterised in that
      the inner pipe (3) is lengthened at the inlet aperture in such a manner that it protrudes from the plane (6) of the inlet.
    9. Inlet device according to one of the preceding claims, characterised in that
      the inner pipe (3) is lengthened at the outlet aperture (14) in such a manner that it protrudes from the outlet aperture (14).
    10. Inlet device according to one of claims 1 to 8,
      characterised in that
      the inner pipe (3) is shortened at the outlet aperture (14) in such a manner that it terminates internally of the outer pipe (4).
    EP96900589A 1995-01-19 1996-01-17 Inlet device for an internal combustion engine Expired - Lifetime EP0804682B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19501411A DE19501411A1 (en) 1995-01-19 1995-01-19 Intake device for an internal combustion engine
    DE19501411 1995-01-19
    PCT/EP1996/000174 WO1996022462A1 (en) 1995-01-19 1996-01-17 Inlet device for an internal combustion engine

    Publications (2)

    Publication Number Publication Date
    EP0804682A1 EP0804682A1 (en) 1997-11-05
    EP0804682B1 true EP0804682B1 (en) 2001-04-04

    Family

    ID=7751779

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96900589A Expired - Lifetime EP0804682B1 (en) 1995-01-19 1996-01-17 Inlet device for an internal combustion engine

    Country Status (10)

    Country Link
    US (1) US5947072A (en)
    EP (1) EP0804682B1 (en)
    JP (1) JPH10512642A (en)
    KR (1) KR19980701220A (en)
    AR (1) AR000750A1 (en)
    BR (1) BR9606763A (en)
    CZ (1) CZ287893B6 (en)
    DE (2) DE19501411A1 (en)
    WO (1) WO1996022462A1 (en)
    ZA (1) ZA96413B (en)

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    WO1997046797A1 (en) * 1996-06-03 1997-12-11 Filterwerk Mann + Hummel Gmbh Airflow device
    ES2136006B1 (en) * 1996-10-22 2000-05-16 Torralba Gimeno Cesar VACUUM COMPENSATOR FOR EXPLOSION MOTORS.
    DE19812565B4 (en) * 1998-03-21 2007-12-20 Mahle Filtersysteme Gmbh Air intake for an internal combustion engine of a motor vehicle
    JP2001059458A (en) * 1999-06-16 2001-03-06 Aichi Mach Ind Co Ltd Intake manifold for internal combustion engine
    KR20050052455A (en) * 2002-07-19 2005-06-02 리텐스 오토모티브 파트너쉽 Intake manifold having variable cross-sectional area
    US7263961B2 (en) * 2003-10-01 2007-09-04 Leo Now Gas directing system and method
    US6986333B2 (en) * 2004-05-25 2006-01-17 Litens Automotive Intake manifold with variable runner area
    US7614379B2 (en) * 2005-05-23 2009-11-10 Leo Now Air horn for efficient fluid intake
    JP2008031918A (en) * 2006-07-28 2008-02-14 Denso Corp Intake device
    KR100957142B1 (en) * 2007-07-30 2010-05-11 현대자동차주식회사 Air cleaner inhale duct
    KR101386477B1 (en) * 2008-01-10 2014-04-18 엘지전자 주식회사 Noise reducing device for hermetic type compressor
    DE202008010788U1 (en) 2008-08-05 2009-12-31 Mann+Hummel Gmbh Acoustic chamber with variable volume
    US8151754B2 (en) * 2008-09-16 2012-04-10 Kawasaki Jukogyo Kabushiki Kaisha Air-intake duct and air-intake structure
    US20100139604A1 (en) * 2008-12-09 2010-06-10 Reza Abdolhosseini Inlet mechanism for an air induction system
    US8375915B1 (en) * 2009-02-25 2013-02-19 Leo Now Gas directing system and method
    US20150260088A1 (en) * 2014-03-14 2015-09-17 Chung-Shan Institute Of Science And Technology, Armaments Bureau, M.N.D Intake/outlet pipe optimization method for rotary engine
    KR101876070B1 (en) * 2016-10-26 2018-07-06 현대자동차주식회사 Air duct for vehicle having function of reducing intake noise
    JP7206984B2 (en) * 2019-02-08 2023-01-18 トヨタ紡織株式会社 Inlet pipe and intake system parts
    DE102020122027B4 (en) * 2020-08-24 2023-05-04 Mann+Hummel Gmbh Silencer and filter system

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    Also Published As

    Publication number Publication date
    KR19980701220A (en) 1998-05-15
    CZ287893B6 (en) 2001-03-14
    EP0804682A1 (en) 1997-11-05
    DE59608677D1 (en) 2002-03-14
    JPH10512642A (en) 1998-12-02
    MX9705226A (en) 1997-10-31
    ZA96413B (en) 1996-08-28
    WO1996022462A1 (en) 1996-07-25
    AR000750A1 (en) 1997-08-06
    DE19501411A1 (en) 1996-07-25
    BR9606763A (en) 1998-01-06
    CZ211797A3 (en) 1998-07-15
    US5947072A (en) 1999-09-07

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