EP1147304A1 - Intake device having a conducting section which comprises orifices - Google Patents

Intake device having a conducting section which comprises orifices

Info

Publication number
EP1147304A1
EP1147304A1 EP99958058A EP99958058A EP1147304A1 EP 1147304 A1 EP1147304 A1 EP 1147304A1 EP 99958058 A EP99958058 A EP 99958058A EP 99958058 A EP99958058 A EP 99958058A EP 1147304 A1 EP1147304 A1 EP 1147304A1
Authority
EP
European Patent Office
Prior art keywords
openings
section
line section
cross
shells
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
EP99958058A
Other languages
German (de)
French (fr)
Other versions
EP1147304B1 (en
Inventor
Helmut Spannbauer
Matthias Alex
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
Filterwerk 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 Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP1147304A1 publication Critical patent/EP1147304A1/en
Application granted granted Critical
Publication of EP1147304B1 publication Critical patent/EP1147304B1/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
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1238—Flow throttling or guiding by using secondary connections to the ambient, e.g. covered by a membrane or a porous member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1283—Manufacturing or assembly; Connectors; Fixations

Definitions

  • the invention relates to an intake device, in particular for an internal combustion engine, with a line section which has openings, according to the preamble of patent claim 1.
  • the intake manifold of an air filter housing is provided with a series of holes.
  • the holes create short circuits between the pipe voium and the environment beyond the pipe wall. This suppresses or reduces the formation of standing waves in the tube, thereby damping the intake noise.
  • the area around the pipe is usually formed by the engine compartment, in which further components of the internal combustion engine are arranged. Due to the short circuit of the engine compartment with the interior of the pipe, however, the pulsation of the intake air leads to vibration excitation of other components in the engine compartment, which may make additional measures for vibration damping necessary. In addition, warm air can be drawn in from the engine compartment via the bores, as a result of which the performance of the internal combustion engine is reduced. Incidentally, the drilling of holes in the pipe socket means an additional manufacturing effort that reduces the economics of the component. This can only be kept within limits by providing only a small number of holes. It might be used as a conduit section a fabric tube having a certain Heilehrs' stechnik the environment. Although these components have optimal acoustic properties, they are expensive to manufacture.
  • connection to the suction device creates additional manufacturing and assembly costs.
  • the object of the invention is to create a line section, in particular for the intake tract of internal combustion engines, with optimal noise-damping properties, which is economical to manufacture and has a low vibration influence on adjacent components in the engine compartment. This object is solved by the features of claim 1.
  • the suction device according to the invention has a line section which has a number of openings, these openings each having a cross section of less than 7 mm 2 .
  • a larger number of openings can therefore be provided in the line section, the total cross section of all openings remaining the same or even becoming smaller.
  • the influences on the components adjacent to the line section due to pulsation effects can be minimized as far as possible.
  • the openings are designed as round holes. They can then be made inexpensively as bores in the wall of the line section. If the line section is made of plastic, a larger number of bores can also be made in the line section from an economic point of view. It is advantageous to provide bores with a diameter of approximately 1.5 mm. It has been shown that rows of holes, consisting of holes with a diameter of 1.5 mm in the problematic frequency range of 100-300 hearts, even have a higher degree of damping, caused by the line section, have, as a piece of fabric hose with the same dimensions as that with
  • the line section consists of at least one casting, in particular of plastic.
  • the openings can then be formed by an appropriate design of the casting tools. There is therefore no need for a further manufacturing step to introduce the openings.
  • a round cross section of the openings can be dispensed with.
  • a cross-sectional area of the openings corresponding to bores with a diameter of 1.5 mm is particularly advantageous.
  • a further embodiment of the invention provides for the openings to be accommodated in the parting line between two cast parts.
  • the castings can then, for. B. be plugged together by a clip connection.
  • a leakage in the parting line between the castings can be accepted.
  • the openings are arranged in the parting line of the housing parts, this has the advantage that only an insignificantly different design of the housing shape in the edge region is necessary for this.
  • Such modifications can also be made subsequently in the mold if z. B. shows that the acoustics of a near-series intake system is still in need of improvement.
  • the openings are particularly advantageous to arrange the openings in one or more rows along the flow direction of the tube. In this way, the formation of standing waves in the damping line section can be effectively reduced over a larger frequency range. This results in an attenuation over a larger frequency spectrum.
  • this can have a cross section that increases in the flow direction.
  • This diffuser-like design favors the air entry into the pipe section. This happens through a Recovery of speed energy from the at the entrance of the
  • the cross sections of the line section can be made variable.
  • the change in cross section is generated with the aid of an actuating element which represents part of the wall of the line section.
  • the openings can be accommodated both in the fixed wall parts and in the control element.
  • the control element can be provided for different cross-sectional profiles. It is conceivable, for. B. a variation of the opening angle of the diffuser. Another possibility is to provide a constant cross-sectional area of the line section over the length of the adjusting element, this cross-sectional area being able to be varied by actuating the adjusting element.
  • Fig. 1 shows an intake manifold, which as a line section in a
  • Suction device can be integrated and has holes in the wall, in longitudinal section,
  • Fig. 2 is an intake manifold consisting of two snapped shells, openings being provided along the parting line and Fig. 3 shows the longitudinal section through a vario diffuser, driven by a
  • the actuator is designed as a wall part with openings.
  • FIG. 1 shows the basic structure of a line section 10 which is suitable for installation in a suction device for an internal combustion engine.
  • the line section is used as a raw air intake and is attached to the intake device using a flange 11.
  • the direction of flow is indicated by an arrow, the circular cross sections increasing linearly in the direction of flow. This results in a diffuser effect of the line section.
  • a tube wall 12 is provided with four rows of bores 13, the bores each having a cross section of less than 7 mm 2 .
  • the rows of holes created in this way are offset by 90 ° on the circumference of the pipe wall.
  • FIG. 2 shows a cross section through the line section 10, which has essentially the same geometry as that shown in FIG. 1.
  • the line section according to FIG. 2 consists of two half-shells 14 which are connected to one another by a snap connection 15.
  • a parting line 16 between the half-shells 14 depressions are provided at regular intervals, which produce openings 17 in the tube wall.
  • the snap connections 15 are arranged such that they act on the intake manifold shells in an area between two openings.
  • FIG. 3 shows the possible configuration of a vario diffuser 18.
  • This has a rectangular cross section.
  • Three walls of the cross section are designed as a rigid base body 19.
  • the fourth wall consists essentially of an actuating element 20 which is driven by a schematically illustrated motor 21 becomes.
  • the actuating element is rotatably mounted in the base body via a hinge 22.
  • the actuating element 20 is connected to the base body via a flexible wall section 23.
  • the actuating element is moved about the hinge axis by the motor drive, as a result of which the linear cross-sectional change of the vario diffuser 18 in the line section 10 can be varied.
  • the actuating element shears along side walls 24 of the base body.
  • a seal can be provided between these two components, or a narrow sealing gap is provided. Similar to the openings 17 accommodated in the control element 20, this can be used to positively influence the intake acoustics.
  • the connection between the flexible wall section 23 each with the actuating element 20 and the base body 19 can, for. B. by an adhesive connection or vulcanization.

Landscapes

  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Exhaust Silencers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Exhaust Gas After Treatment (AREA)
  • External Artificial Organs (AREA)

Abstract

A duct or conduit section (10) for installation, in particular, in an air intake system of an internal combustion engine, in which the duct section is composed of two shells (14) which are joined by a snap connection (15). Openings located in the parting seam or joint (16) between the shells (14) are produced by recesses in the half shells. These openings each have a cross-sectional area of less than 7 mm2 and are useful for suppressing noise resulting from the air intake. As a result of the openings, vibration-inducing forces exerted on adjacent components in the engine compartment due to pulsations in the intake tube, can be minimized or avoided. Also, the quantity of additional air drawn in from the engine compartment, which is undesired because it is too warm, is decreased.

Description

Ansaugvorrichtung mit einem Durchbrüche aufweisenden Leitungsabschnitt Suction device with a line section having openings
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung betrifft eine Ansaugvorrichtung, insbesondere für eine Brennkraftmaschine, mit einem Leitungsabschnitt, der Durchbrüche aufweist, nach der Gattung des Patentanspruches 1.The invention relates to an intake device, in particular for an internal combustion engine, with a line section which has openings, according to the preamble of patent claim 1.
Die Anbringung von Durchbrüchen, insbesondere Bohrungen, ist z. B. aus der DE 1642857 bekannt. Gemäß dieser Schrift wird der Ansaugstutzen eines Luftfiltergehäuses mit einer Reihe von Bohrungen versehen. Um aus fertigungstechnischen Gründen die Anzahl der Bohrungen zu begrenzen, sind diese in einer hinreichenden Größe zu Erreichung des gewünschten akustischen Effektes ausgeführt. Die Bohrungen schaffen Kurzschlüsse des Rohrvoiumens mit der Umgebung jenseits der Rohrwand. Dadurch wird die Ausbildung stehender Wellen im Rohr unterdrückt oder vermindert und hierdurch eine Dämpfung des Ansauggeräusches erzielt.The attachment of breakthroughs, especially holes, is such. B. known from DE 1642857. According to this document, the intake manifold of an air filter housing is provided with a series of holes. In order to limit the number of bores for manufacturing reasons, they are of a sufficient size to achieve the desired acoustic effect. The holes create short circuits between the pipe voium and the environment beyond the pipe wall. This suppresses or reduces the formation of standing waves in the tube, thereby damping the intake noise.
Die Umgebung des Rohres wird meist durch den Motorraum gebildet, in dem weitere Komponenten der Brennkraftmaschine angeordnet sind. Durch den Kurzschluß des Motorraumes mit dem Rohrinneren führt jedoch die Pulsation der Ansaugluft zu einer Schwingungsanregung anderer Bauteile im Motorraum, was zusätzliche Maßnahmen zur Schwingungsdämpfung notwendig werden lassen kann. Außerdem kann es über die Bohrungen zu einer Ansaugung von Warmluft aus dem Motorraum kommen, wobei hierdurch die Leistung der Brennkraftmaschine vermindert wird. Im übrigen bedeutet das Anbringen von Bohrungen im Rohrstutzen ein zusätzlichen Fertigungsaufwand der die Wirtschaftlichkeit des Bauteils vermindert. Dieser kann nur in Grenzen gehalten werden, in dem nur eine geringe Anzahl von Bohrungen vorgesehen wird. Man könnte nun als Leitungsabschnitt einen Gewebeschlauch einsetzen, der eine gewisse Luftdurchläs'sigkeit zur Umgebung aufweist. Diese Bauelemente besitzen zwar optimale akustische Eigenschaften, sind aber teuer in der Herstellung.The area around the pipe is usually formed by the engine compartment, in which further components of the internal combustion engine are arranged. Due to the short circuit of the engine compartment with the interior of the pipe, however, the pulsation of the intake air leads to vibration excitation of other components in the engine compartment, which may make additional measures for vibration damping necessary. In addition, warm air can be drawn in from the engine compartment via the bores, as a result of which the performance of the internal combustion engine is reduced. Incidentally, the drilling of holes in the pipe socket means an additional manufacturing effort that reduces the economics of the component. This can only be kept within limits by providing only a small number of holes. It might be used as a conduit section a fabric tube having a certain Luftdurchläs' sigkeit the environment. Although these components have optimal acoustic properties, they are expensive to manufacture.
Außerdem schafft die Anbindung an die Ansaugvorrichtung einen zusätzlichen fertigungs- und montagetechnischen Aufwand.In addition, the connection to the suction device creates additional manufacturing and assembly costs.
Die Aufgabe der Erfindung ist die Schaffung eines Leitungsabschnittes, insbesondere für den Ansaugtrakt von Brennkraftmaschinen, mit optimalen geräuschdämpfenden Eigenschaften, der wirtschaftlich in der Herstellung ist und eine geringe Schwingungsbeeinflussung benachbarter Bauteile im Motorraum zur Folge hat. Diese Aufgabe wird durch die Merkmale des Anspruches 1 gelöst.The object of the invention is to create a line section, in particular for the intake tract of internal combustion engines, with optimal noise-damping properties, which is economical to manufacture and has a low vibration influence on adjacent components in the engine compartment. This object is solved by the features of claim 1.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Ansaugvorrichtung weist einen Leitungsabschnitt auf, der eine Reihe von Durchbrüchen besitzt, wobei diese Durchbrüche jeweils einen Querschnitt von weniger als 7 mm2 aufweisen. Im Vergleich zum Stand der Technik kann daher eine größere Anzahl von Durchbrüche im Leitungsabschnitt vorgesehen werden, wobei dabei der Gesamtquerschnitt aller Durchbrüche gleich bleibt oder sogar kleiner wird. Dadurch können die Einflüsse auf die dem Leitungsabschnitt benachbarten Bauteile aufgrund von Pulsationseffekten weitestgehend minimiert werden.The suction device according to the invention has a line section which has a number of openings, these openings each having a cross section of less than 7 mm 2 . In comparison to the prior art, a larger number of openings can therefore be provided in the line section, the total cross section of all openings remaining the same or even becoming smaller. As a result, the influences on the components adjacent to the line section due to pulsation effects can be minimized as far as possible.
Gemäß einer zweckmäßigen Ausbildung des Erfindungsgedankens sind die Durchbrüche als Rundlöcher ausgeführt. Sie können dann kostengünstig als Bohrungen in die Wandung des Leitungsabschnittes eingebracht werden. Sofern der Leitungsabschnitt aus Kunststoff besteht, kann auch eine größere Anzahl von Bohrungen unter wirtschaftlichen Gesichtspunkten in den Leitungsabschnitt eingebracht werden. Es ist vorteilhaft, Bohrungen mit einem Durchmesser von ungefähr 1 ,5 mm vorzusehen. Es hat sich gezeigt, daß Lochreihen, bestehend aus Bohrungen mit 1 ,5 mm Durchmesser im problematischen Frequenzbereich von 100- 300 Herz sogar ein höheres Dämpfuπgsmaß, bewirkt durch den Leitungsabschnitt, aufweisen, als ein Gewebeschlauchstück mit gleichen Abmessungen wie der mitAccording to an expedient embodiment of the inventive concept, the openings are designed as round holes. They can then be made inexpensively as bores in the wall of the line section. If the line section is made of plastic, a larger number of bores can also be made in the line section from an economic point of view. It is advantageous to provide bores with a diameter of approximately 1.5 mm. It has been shown that rows of holes, consisting of holes with a diameter of 1.5 mm in the problematic frequency range of 100-300 hearts, even have a higher degree of damping, caused by the line section, have, as a piece of fabric hose with the same dimensions as that with
Bohrungen versehen Leitungsabschnitt.Holes provide the line section.
Gemäß einer günstigen Ausführungsform der Erfindung besteht der Leitungsabschnitt aus mindestens einem Gußteil, insbesondere aus Kunststoff. Die Durchbrüche können dann durch eine entsprechende Gestaltung der Gußwerkzeuge gebildet werden. Es ist somit kein weiterer Fertigungsschritt zur Einbringung der Durchbrüche notwendig. Bei dieser Variante kann von einem runden Querschnitt der Durchbrüche abgesehen werden. Auch hier ist eine Querschnittsfläche der Durchbrüche entsprechend von Bohrungen mit 1 ,5 mm Durchmesser besonders vorteilhaft.According to a favorable embodiment of the invention, the line section consists of at least one casting, in particular of plastic. The openings can then be formed by an appropriate design of the casting tools. There is therefore no need for a further manufacturing step to introduce the openings. In this variant, a round cross section of the openings can be dispensed with. Here, too, a cross-sectional area of the openings corresponding to bores with a diameter of 1.5 mm is particularly advantageous.
Eine weitere Ausgestaltung der Erfindung sieht vor, die Durchbrüche in der Trennfuge zwischen zwei Gußteilen unterzubringen. Die Gußteile können dann z. B. durch eine Klipsverbindung aufeinander gesteckt werden. Dabei kann eine Leckgage in der Trennfuge zwischen den Gußteiien hingenommen werden. Diese können sogar zu einer weiteren Verbesserung der Saugrohrakustik führen und hierzu bewußt genutzt werden. Werden die Durchbrüche in der Trennfuge der Gehäuseteile angeordnet, hat dies den Vorteil, daß hierzu nur eine unwesentlich andere Gestaltung der Gehäuseform im Randbereich notwendig ist. Derartige Modifikationen können auch nachträglich in der Gußform noch vorgenommen werden, wenn sich z. B. zeigt daß die Akustik eines seriennahen Ansaugsystems noch verbesserungswürdig ist.A further embodiment of the invention provides for the openings to be accommodated in the parting line between two cast parts. The castings can then, for. B. be plugged together by a clip connection. A leakage in the parting line between the castings can be accepted. These can even lead to a further improvement in the intake manifold acoustics and can be used consciously for this purpose. If the openings are arranged in the parting line of the housing parts, this has the advantage that only an insignificantly different design of the housing shape in the edge region is necessary for this. Such modifications can also be made subsequently in the mold if z. B. shows that the acoustics of a near-series intake system is still in need of improvement.
Aus akustischer Sicht ist es besonders vorteilhaft, die Durchbrüche in einer oder mehreren Reihen entlang der Durchflußrichtung des Rohres anzuordnen. Auf diese Weise kann die Ausbildung von stehenden Wellen im dämpfenden Leitungsabschnitt über einen größeren Frequenzbereich wirksam vermindert werden. Hierdurch ergibt sich eine Dämpfung über ein größeres Frequenzspektrum hinweg.From an acoustic point of view, it is particularly advantageous to arrange the openings in one or more rows along the flow direction of the tube. In this way, the formation of standing waves in the damping line section can be effectively reduced over a larger frequency range. This results in an attenuation over a larger frequency spectrum.
Um den Lufteintritt in den Leitungsabschnitt zu begünstigen, kann dieser gemäß einer weiteren Ausgestaltung der Erfindung einen in Strömungsrichtung zunehmenden Querschnitt aufweisen. Durch diese diffusorartige Ausgestaltung wird der Lufteintritt in den Rohrabschnitt begünstigt. Dies geschieht durch eine Rückgewinnung von Geschwindigkeitsenergie aus dem am Eingang desIn order to favor the air entry into the line section, according to a further embodiment of the invention, this can have a cross section that increases in the flow direction. This diffuser-like design favors the air entry into the pipe section. This happens through a Recovery of speed energy from the at the entrance of the
Leitungsabschnittes entstehenden Druckverlustes.Line section resulting pressure loss.
Weiterhin können gemäß einer günstigen Aufsührungsform der Erfindung die Querschnitte des Leitungsabschnittes veränderlich ausgeführt sein. Die Querschnittsveränderung wird mit Hilfe eines Stellelementes erzeugt, welches einen Teil der Wand des Leitungsabschnittes darstellt. Die Durchbrüche können sowohl in den festen Wandteilen wie auch im Stellelement untergebracht sein. Das Stellelement kann für unterschiedliche Querschnittsverläufe vorgesehen werden. Denkbar ist z. B. eine Variation des Öffnungswinkels des Diffusors. Eine andere Möglichkeit besteht darin, über die Länge des Stellelementes eine konstante Querschnittsfläche des Leitungsabschnittes vorzusehen, wobei durch Betätigung des Stellelementes diese Querschnittsfläche variiert werden kann.Furthermore, according to a favorable embodiment of the invention, the cross sections of the line section can be made variable. The change in cross section is generated with the aid of an actuating element which represents part of the wall of the line section. The openings can be accommodated both in the fixed wall parts and in the control element. The control element can be provided for different cross-sectional profiles. It is conceivable, for. B. a variation of the opening angle of the diffuser. Another possibility is to provide a constant cross-sectional area of the line section over the length of the adjusting element, this cross-sectional area being able to be varied by actuating the adjusting element.
Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and further features of preferred developments of the invention are evident from the claims and also from the description and the drawings, the individual features being implemented individually or in groups in the form of subcombinations in the embodiment of the invention and in other fields, and can represent advantageous and protectable versions for which protection is claimed here.
Zeichnungdrawing
Weitere Einzelheiten der Erfindung werden in den Zeichnungen anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigen:Further details of the invention are described in the drawings using schematic exemplary embodiments. Here show:
Fig. 1 einen Ansaugstutzen, der als Leitungsabschnitt in eineFig. 1 shows an intake manifold, which as a line section in a
Ansaugvorrichtung integriert werden kann und Bohrungen in der Wand aufweist, im Längsschnitt,Suction device can be integrated and has holes in the wall, in longitudinal section,
Fig. 2 einen Ansaugstutzen bestehend aus zwei verschnappten Schalen, wobei entlang der Trennfuge Durchbrüche vorgesehen sind und Fig. 3 den Längsschnitt durch einen Variodiffuser, angetrieben durch einenFig. 2 is an intake manifold consisting of two snapped shells, openings being provided along the parting line and Fig. 3 shows the longitudinal section through a vario diffuser, driven by a
Motor, wobei das Stellelement als Wandteil mit Durchbrüchen ausgeführt ist.Motor, wherein the actuator is designed as a wall part with openings.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Der Figur 1 läßt sich der prinzipielle Aufbau eines Leitungsabschnittes 10, der zum Einbau in eine Ansaugvorrichtung für eine Brennkraftmaschine geeignet ist, entnehmen. Der Leitungsabschnitt wird als Rohluftansaugstutzen verwendet und wirdmit Hilfe eines Flansches 1 1 an der Ansaugvorrichung befestigt. Die Durchströmungsrichtung ist durch einen Pfeil angedeutet, wobei sich die kreisförmig ausgeführten Querschnitte in Durchströmungsrichtung linear vergrößern. Hierdurch kommt eine Diffusorwirkung des Leitungsabschnittes zustande. Eine Rohrwandung 12 ist mit vier Reihen von Bohrungen 13 versehen, wobei die Bohrungen einen Querschnitt von jeweils kleiner als 7 mm2 aufweisen. Die so entstehenden Lochreihen sind am Umfang der Rohrwandung um jeweils 90° versetzt angeordnet.1 shows the basic structure of a line section 10 which is suitable for installation in a suction device for an internal combustion engine. The line section is used as a raw air intake and is attached to the intake device using a flange 11. The direction of flow is indicated by an arrow, the circular cross sections increasing linearly in the direction of flow. This results in a diffuser effect of the line section. A tube wall 12 is provided with four rows of bores 13, the bores each having a cross section of less than 7 mm 2 . The rows of holes created in this way are offset by 90 ° on the circumference of the pipe wall.
Figur 2 stellt einen Querschnitt durch den Leitungsabschnitt 10 dar, der im wesentlichen die selbe Geomtrie aufweist, wie der in der Figur 1 dargestellte. Der Leitungsabschnitt gemäß Figur 2 besteht jedoch aus zwei Halbschalen 14, die durch eine Schnappverbindung 15 miteinander verbunden sind. In einer Trennfuge 16 zwischen den Halbschalen 14 sind in regelmäßigen Abständen Vertiefungen vorgesehen, die Durchbrüche 17 in der Rohrwandung erzeugen. Die Schnappverbindungen 15 sind derart angeordnet, daß sie in einem Bereich zwischen zwei Durchbrüchen an den Saugrohrschalen angreifen. Durch eine entsprechende Gestaltung der Halbschalen 14 können diese in derselben Gußform hergestellt werden. Dadurch können die Kosten für ein zweites Gußwerkzeug eingespart werden.FIG. 2 shows a cross section through the line section 10, which has essentially the same geometry as that shown in FIG. 1. However, the line section according to FIG. 2 consists of two half-shells 14 which are connected to one another by a snap connection 15. In a parting line 16 between the half-shells 14, depressions are provided at regular intervals, which produce openings 17 in the tube wall. The snap connections 15 are arranged such that they act on the intake manifold shells in an area between two openings. By appropriately designing the half-shells 14, they can be produced in the same mold. As a result, the costs for a second casting tool can be saved.
Figur 3 zeigt die mögliche Ausgestaltung eines Variodiffusors 18. Dieser weist einen rechteckigen Querschnitt auf. Dabei sind drei Wände des Querschnittes als starrer Grundkörper 19 ausgebildet. Die vierte Wand besteht im wesentlichen aus einem Stellelement 20 welches durch ein schematisch dargestellten Motor 21 angetrieben wird. Das Stellelement ist im Grundkörper über ein Scharnier 22 drehbar gelagert. Auf der gegenüberliegenden Seite ist das Stellelement 20 über einen flexiblen Wandabschnitt 23 mit dem Grundkörper verbunden. Durch den motorischen Antrieb wird das Stellelement um die Scharnierachse bewegt, wodurch die lineare Querschnittsveränderung des Variodiffusors 18 im Leitungsabschnitt 10 variiert werden kann. Dabei schert das Stellelement entlang von Seitenwänden 24 des Grundkörpers. Zwischen diesen beiden Bauteilen kann eine Dichtung vorgesehen sein, oder es wird ein schmaler Dichtspalt vorgesehen. Dieser kann ähnlich wie die im Stellelement 20 untergebrachten Durchbrüche 17 zur positiven Beeinflußung der Ansaugakustik genutzt werden. Die Verbindung zwischen dem flexiblen Wandabschnitt 23 jeweils mit dem Stellelement 20 und dem Grundkörper 19 kann z. B. durch eine Klebeverbindung oder Anvulkanisieren erfolgen. FIG. 3 shows the possible configuration of a vario diffuser 18. This has a rectangular cross section. Three walls of the cross section are designed as a rigid base body 19. The fourth wall consists essentially of an actuating element 20 which is driven by a schematically illustrated motor 21 becomes. The actuating element is rotatably mounted in the base body via a hinge 22. On the opposite side, the actuating element 20 is connected to the base body via a flexible wall section 23. The actuating element is moved about the hinge axis by the motor drive, as a result of which the linear cross-sectional change of the vario diffuser 18 in the line section 10 can be varied. The actuating element shears along side walls 24 of the base body. A seal can be provided between these two components, or a narrow sealing gap is provided. Similar to the openings 17 accommodated in the control element 20, this can be used to positively influence the intake acoustics. The connection between the flexible wall section 23 each with the actuating element 20 and the base body 19 can, for. B. by an adhesive connection or vulcanization.
BezugszeichenlisteReference list
LeitungsabschnittLine section
Flanschflange
RohrwandungPipe wall
Bohrungdrilling
HalbschaleHalf shell
SchnappverbindungSnap connection
TrennfugeParting line
Durchbruchbreakthrough
VariodiffusorVario diffuser
GrundkörperBasic body
StellelementActuator
Motorengine
Scharnier flexibler WandabschnittHinge flexible wall section
Seitenwand Side wall

Claims

Patentansprüche claims
1. Ansaugvorrichtung, insbesondere für eine Brennkraftmaschine, die einen Leitunggsabschnitt (10) zur Führung der Ansaugiuft aufweist, wobei dieser mit mindestens einer Reihe von Durchbrüchen (17), die in den Motorraum münden, versehen ist, dadurch gekennzeichnet, daß die Durchbrüche einen Querschnitt kleiner 7 mm2 aufweisen.1. Intake device, in particular for an internal combustion engine, which has a line section (10) for guiding the intake air, this being provided with at least one row of openings (17) which open into the engine compartment, characterized in that the openings have a cross section have less than 7 mm 2 .
2. Ansaugvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die Durchbrüche (17) Rundlöcher sind2. Suction device according to claim 1, characterized in that the openings (17) are round holes
3. Ansaugvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Durchbrüche einen Durchmesser von 1 5 mm aufweisen.3. Suction device according to claim 2, characterized in that the openings have a diameter of 1 5 mm.
4 Ansaugvorπchtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Leitungsabschnitt (10) aus mindestens einem Gußteil insbesondere aus Kunsstoff besteht, wobei die Durchbrύche (17) durch die Gußwerkzeuge gebildet sind.4 Ansaugvorπchtung according to any one of the preceding claims, characterized in that the line section (10) consists of at least one casting, in particular made of plastic, wherein the openings (17) are formed by the casting tools.
5. Ansaugvorπchtung nach Anspruch 4, dadurch gekennzeichnet, daß die Durchbrüche (17) in einer Trennfuge (16) zwischen zwei Gußteiien, insbesondere Halbschalen (14), des Leitungsabschnittes (10) untergebracht sind.5. Ansaugvorπchtung according to claim 4, characterized in that the openings (17) in a joint (16) between two castings, in particular half-shells (14), the line section (10) are housed.
6. Ansaugvorπchtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Reihe von Durchbrüchen (17) entlang der Durchflußrichtung des Rohres verlauft.6. Ansaugvorπchtung according to any one of the preceding claims, characterized in that the series of openings (17) along the flow direction of the tube.
7. Ansaugvorπchtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Leitungsabschnitt (10) einen in Stömungsrichtung zunehmenden Querschnitt aufweist.7. Ansaugvorπchtung according to any one of the preceding claims, characterized in that the line section (10) has an increasing cross-section in the direction of flow.
8. Ansaugvorπchtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Querschnitt zumindest über einen Teil des Leitungsabschnittes durch ein Stellelement (20) variierbar ausgeführt ist. 8. Ansaugvorπchtung according to any one of the preceding claims, characterized in that the cross section is made variable at least over part of the line section by an actuator (20).
EP99958058A 1999-01-27 1999-11-17 Intake device having a conducting section which comprises orifices Expired - Lifetime EP1147304B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19903165 1999-01-27
DE19903165A DE19903165A1 (en) 1999-01-27 1999-01-27 Suction device with a line section having openings
PCT/EP1999/008826 WO2000045044A1 (en) 1999-01-27 1999-11-17 Intake device having a conducting section which comprises orifices

Publications (2)

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EP1147304A1 true EP1147304A1 (en) 2001-10-24
EP1147304B1 EP1147304B1 (en) 2003-07-23

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US (1) US6520284B2 (en)
EP (1) EP1147304B1 (en)
AT (1) ATE245767T1 (en)
DE (2) DE19903165A1 (en)
ES (1) ES2205911T3 (en)
WO (1) WO2000045044A1 (en)

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Also Published As

Publication number Publication date
US6520284B2 (en) 2003-02-18
US20020029927A1 (en) 2002-03-14
ES2205911T3 (en) 2004-05-01
WO2000045044A1 (en) 2000-08-03
DE19903165A1 (en) 2000-08-03
DE59906397D1 (en) 2003-08-28
EP1147304B1 (en) 2003-07-23
ATE245767T1 (en) 2003-08-15

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