EP1137874A1 - Air duct, especially fitted in the air intake system of an internal combustion engine - Google Patents

Air duct, especially fitted in the air intake system of an internal combustion engine

Info

Publication number
EP1137874A1
EP1137874A1 EP99947393A EP99947393A EP1137874A1 EP 1137874 A1 EP1137874 A1 EP 1137874A1 EP 99947393 A EP99947393 A EP 99947393A EP 99947393 A EP99947393 A EP 99947393A EP 1137874 A1 EP1137874 A1 EP 1137874A1
Authority
EP
European Patent Office
Prior art keywords
flow
flow obstacles
air line
obstacles
duct
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
EP99947393A
Other languages
German (de)
French (fr)
Other versions
EP1137874B1 (en
Inventor
Matthias Alex
Helmut Spannbauer
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 EP1137874A1 publication Critical patent/EP1137874A1/en
Application granted granted Critical
Publication of EP1137874B1 publication Critical patent/EP1137874B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • F02M29/04—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
    • 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
    • F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
    • 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
    • F02M35/1283—Manufacturing or assembly; Connectors; Fixations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/107—Manufacturing or mounting details

Definitions

  • Air line especially in the intake tract of an internal combustion engine
  • the invention relates to an air line, particularly suitable for the intake tract of an internal combustion engine, which has a device for calming the flow in the line cross section
  • Devices of this type are known, for example, from EP 863 303 and are primarily used to improve the acoustics of suction pipes.
  • the functional principle of the device is based on smoothing out turbulence in the flow, and in this way in particular detaching the flow from the pipe walls In this way, for example, the whistling noise that occurs when throttle valves are opened when they only open a small gap to the pipe wall can be reduced or avoided.
  • the devices consist, for example, of pipe inserts that extend into the interior of the intake pipe
  • the acoustic advantage of the inserted pipe inserts is, however, paid for by the disadvantage that this opposes the flow to a resistance, which leads to engine power losses.
  • the power losses contribute to an undesirable increase in the fuel consumption of the internal combustion engine be attached to a difficult to access location, which explains the manufacturing and assembly costs.
  • a casting-technical production causes unwanted additional costs for the above-mentioned acoustic measure due to a complicated shape
  • the object of the invention is therefore to provide a device for acoustic optimization, in particular of intake manifolds, in which the flow losses which occur are reduced to a minimum, the manufacturing and assembly outlay for introducing this device being kept within limits. This object is solved by the features of claim 1.
  • the air line according to the invention which can be installed in particular in the intake tract of an internal combustion engine, has flow obstacles to calm the flow in the line cross section. However, these are not distributed over the entire pipe cross-section, but are only attached to the walls of the pipe. It has been shown that, in particular for acoustic optimization of suction pipes, only the flow in the pipe wall area has to be calmed down.
  • the manufacturing outlay can be kept within limits.
  • the component forming the flow obstacle can e.g. B. simply be inserted into a receptacle which is integrated in the mold intended for the manufacture of the pipe section. Another possibility is to fix the component in the flange area of two pipe sections during assembly.
  • the flow obstacles can be attached to the entire circumference of the tube wall of a certain cross section or only to parts thereof. Should z. B the flow separation on the inside of a pipe bend can be reduced, it suffices to accommodate the flow obstacles in the corresponding wall part.
  • the flow obstacles consist of a strand-like material, e.g. B. wire. This is available as a cheap semi-finished product and is easy to process. It can advantageously be poured into the wall of the air line.
  • other materials are also conceivable, e.g. B. porous materials.
  • Ribs pointing radially into the pipe interior can also be provided in the casting mold of the pipe. This is particularly conceivable for plastic suction pipes.
  • wire-shaped semi-finished products or comparable materials has the additional advantage that they can be processed into meshes or similar geometries. In comparison to massive flow obstacles, these counter the flow with respect to the partial area of the flow cross-section that they cover, a significantly lower flow resistance. The flow obstacles are thus flowed through and not flowed around, which has an additional effect of smoothing the flow in the pipe wall area behind the flow obstacles.
  • the flow obstacles are poured into a sealing ring which, for. B. can be introduced into a flange connection of the raw air line. It is Z. B. pouring a wire mesh ring conceivable, which protrudes into the area spanned by the sealing ring.
  • Figure 1 shows the detail of an air line with a directly behind the
  • Throttle valve arranged in the line flange, with a sealing ring equipped with a wire mesh ring being used as a flow obstacle, on average,
  • FIG. 2 shows the detail X from FIG. 1, which shows the structure of the sealing ring
  • FIG. 3 The supervision of a throttle valve module, in which wire strings as
  • Figure 4-5 alternative design of sealing rings with flow obstacles.
  • FIG. 1 the section of an air line is shown, which has a flange 10.
  • the flanged tubes 11, 12 are made of plastic.
  • a groove 13 for a sealing ring 14 is provided in the flange of the tube 12.
  • the flange has threaded sockets 15, which serve to receive screws 16.
  • Corresponding holes 17 are provided in the flange of the tube 11, through which the screws 16 are inserted.
  • the tube 11 has an injection-molded throttle valve 18, the direction of flow of the throttle valve being indicated by an arrow.
  • a throttle valve module 24 is shown in FIG.
  • the structure of the flange for fastening to a pipe end, not shown, corresponds in structure to that of the pipe 12 from FIG. 1.
  • the threaded sleeve 15 and the groove 13 can be seen.
  • the injection molded throttle valve 18 has a shaft 25 to which the valve flaps 26 are attached. To drive the shaft 25, it is guided out of the flap module 24 on one side.
  • the throttle valve is shown in a partially open state, crescent-shaped valve passages 27 being formed.
  • a flap edge 28 swings directly over wire strings 29, which are attached in the area of the flap passages 27 as flow obstacles.
  • the Wire strings are introduced into the wall 21 during the manufacturing process of the throttle valve module. This can e.g. B. done by clamping in the injection mold and then pouring the wire strings. Another option is to heat the wire strings and then melt them into the finished throttle valve module.
  • FIGS. 4 and 5 represent variants for flow obstacles introduced in the sealing ring 14. It is possible to cast pins 30 into the sealing ring. However, these can also be shown in the mold for the ring, so that they are molded onto the inside thereof. It is also possible to pour a zigzag bent wire 31 into the sealing ring 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

An air duct for inclusion in the air intake tract of an internal combustion engine in which flow obstacles, especially wire-shaped flow obstacles, are arranged in the vicinity of the duct wall (21) in order to improve the acoustic characteristics of the duct. The flow obstacle may, for example, be wire strands (29). The flow obstacles are capable of decreasing the acoustic noise emitted by the air duct while maintaining a low flow resistance since the center part of the duct cross-section remains unaffected by the flow obstacles. The flow obstacles may advantageously be arranged in the discharge area of flap valves since so that the valves are prevented from whistling when they are only open a small way. In order to simplify the manufacturing and assembly costs, the flow obstacles may be disposed in the area of a flanged joint in the air intake duct.

Description

Luftleitung, insbesondere im Ansaugtrakt einer Brennkraftmaschine Air line, especially in the intake tract of an internal combustion engine
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung betrifft eine Luftleitung, insbesondere geeignet für den Ansaugtrakt einer Brennkraftmaschine, die eine Einrichtung zur Beruhigung der Strömung im Leitungsquerschnitt aufweistThe invention relates to an air line, particularly suitable for the intake tract of an internal combustion engine, which has a device for calming the flow in the line cross section
Derartige Einrichtungen sind z B aus der EP 863 303 bekannt und werden in erster Linie zur Verbesserung der Akustik von Saugrohren verwendet Das Funktionsprinzip der Einrichtung beruht darauf, daß Turbulenzen in der Strömung geglättet werden, und auf diese Weise insbesondere eine Ablösung der Strömung von den Rohrwanden vermieden wird Auf diese Weise kann z B das Pfeifgerausch vermindert oder vermieden werden, das beim Offnen von Drosselklappen auftritt, wenn diese lediglich einen schmalen Spalt zur Rohrwand freigeben Die Einrichtungen bestehen beispielsweise aus Rohreinsatzen, die in das Innere des Saugrohres hineinreichenDevices of this type are known, for example, from EP 863 303 and are primarily used to improve the acoustics of suction pipes. The functional principle of the device is based on smoothing out turbulence in the flow, and in this way in particular detaching the flow from the pipe walls In this way, for example, the whistling noise that occurs when throttle valves are opened when they only open a small gap to the pipe wall can be reduced or avoided. The devices consist, for example, of pipe inserts that extend into the interior of the intake pipe
Der akustische Vorteil der eingebrachten Rohreinsatze wird jedoch durch den Nachteil erkauft, daß dieses der Strömung einen Widerstand entgegensetzt, welcher zu Leistungsverlusten des Motors fuhrt Die Leistungsverluste tragen zu einem unerwünschten Ansteigen des Kraftstoffverbrauches der Brennkraftmaschine bei Außerdem müssen die Rohreiπsatze im Inneren des Rohres, also an einer schwer zugänglichen Stelle angebracht werden, was den Fertigungs- und Montageaufwand erklart Auch eine gußtechnische Herstellung verursacht durch eine komplizierte Formgestaltung unerwünschte Zusatzkosten für die genannte akustische Maßnahme Aufgabe der Erfindung ist es daher, eine Einrichtung zur akustischen Optimierung insbesondere von Saugrohren zu schaffen, bei der die auftretenden Strömungsverluste auf ein Minimum reduziert sind, wobei der fertigungs- und montagetechnische Aufwand für die Einbringung dieser Einrichtung in Grenzen gehalten werden soll. Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.The acoustic advantage of the inserted pipe inserts is, however, paid for by the disadvantage that this opposes the flow to a resistance, which leads to engine power losses. The power losses contribute to an undesirable increase in the fuel consumption of the internal combustion engine be attached to a difficult to access location, which explains the manufacturing and assembly costs. Also a casting-technical production causes unwanted additional costs for the above-mentioned acoustic measure due to a complicated shape The object of the invention is therefore to provide a device for acoustic optimization, in particular of intake manifolds, in which the flow losses which occur are reduced to a minimum, the manufacturing and assembly outlay for introducing this device being kept within limits. This object is solved by the features of claim 1.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Luftleitung, die insbesondere im Ansaugtrakt einer Brennkraftmaschine eingebaut werden kann, weist zur Beruhigung der Strömung im Leitungsquerschnitt Strömungshindernisse auf. Diese werden jedoch nicht über den gesamtem Leitungsquerschnitt verteilt, sondern werden lediglich an den Wandungen der Rohrleitung angebracht. Es hat sich nämlich gezeigt, daß insbesondere zu einer akustischen Optimierung von Saugrohren lediglich die Strömung im Rohrwandbereich beruhigt werden muß. Das Einbringen z. B. eines Drahtgitters, welches sich über den gesamten Leitungsquerschnitt erstreckt, stellt bezogen auf die sich im Inneren des Rohrquerschnitts ausbildende Strömung ein unnötiges, zusätzliches Strömungshindernis dar.The air line according to the invention, which can be installed in particular in the intake tract of an internal combustion engine, has flow obstacles to calm the flow in the line cross section. However, these are not distributed over the entire pipe cross-section, but are only attached to the walls of the pipe. It has been shown that, in particular for acoustic optimization of suction pipes, only the flow in the pipe wall area has to be calmed down. The introduction z. B. a wire mesh, which extends over the entire line cross-section, represents an unnecessary, additional flow obstacle based on the flow forming in the interior of the tube cross-section.
Durch die Anbringung der Strömungshindernisse im Bereich einer Rohrverbindung kann der fertigungstechnische Aufwand in Grenzen gehalten werden. Die das Strömungshindernis bildende Komponente kann z. B. einfach in eine Aufnahme eingelegt werden, die in die für die Fertigung der Rohrabschnittes gedachte Gußform integriert ist. Eine andere Möglichkeit besteht in der Fixierung der Komponente im Flanschbereich zweier Rohrabschnitte während der Montage.By installing the flow obstacles in the area of a pipe connection, the manufacturing outlay can be kept within limits. The component forming the flow obstacle can e.g. B. simply be inserted into a receptacle which is integrated in the mold intended for the manufacture of the pipe section. Another possibility is to fix the component in the flange area of two pipe sections during assembly.
Die Strömungshindernisse können am gesamten Umfang der Rohrwandung eines bestimmten Querschnitts angebracht sein oder nur an Teilen davon. Soll z. B die Strömungsablösung an der Innenseite eines Rohrbogens vermindert werden, genügt es, die Strömungshindernisse in dem entsprechenden Wandteil unterzubringen. Einer besonderen Ausführungsform gemäß bestehen die Strömungshindernisse aus einem strangförmigen Material, z. B. Draht. Dieser ist als billiges Halbzeug zu beziehen und leicht zu verarbeiten. Er kann vorteilhafterweise in die Wandung der Luftleitung eingegossen werden. Es sind jedoch auch andere Materialien denkbar, z. B. poröse Stoffe. Es können auch radial ins Rohrinnere weisende Rippen in der Gußform des Rohres vorgesehen werden. Dies ist insbesondere für Kunststoffsaugrohre denkbar. Die Verwendung drahtförmiger Halbzeuge oder vergleichbarer Materialien hat aber zusätzlich den Vorteil, daß diese zu Gittern Geflechten oder ähnlichen Geometrien verarbeitet werden können. Im Vergleich zu massiven Strömungshindernissen setzen diese der Strömung bezogen auf die Teilfläche des Strömungsquerschnittes, den sie abdecken, einen wesentlich geringeren Strömungswiderstand entgegen. Die Strömungshindernisse werden auf diese Weise durchströmt und nicht umströmt, was einen zusätzlichen Effekt der Glättung der Strömung im Rohrwandbereich hinter den Srömungshindernissen hat.The flow obstacles can be attached to the entire circumference of the tube wall of a certain cross section or only to parts thereof. Should z. B the flow separation on the inside of a pipe bend can be reduced, it suffices to accommodate the flow obstacles in the corresponding wall part. According to a particular embodiment, the flow obstacles consist of a strand-like material, e.g. B. wire. This is available as a cheap semi-finished product and is easy to process. It can advantageously be poured into the wall of the air line. However, other materials are also conceivable, e.g. B. porous materials. Ribs pointing radially into the pipe interior can also be provided in the casting mold of the pipe. This is particularly conceivable for plastic suction pipes. However, the use of wire-shaped semi-finished products or comparable materials has the additional advantage that they can be processed into meshes or similar geometries. In comparison to massive flow obstacles, these counter the flow with respect to the partial area of the flow cross-section that they cover, a significantly lower flow resistance. The flow obstacles are thus flowed through and not flowed around, which has an additional effect of smoothing the flow in the pipe wall area behind the flow obstacles.
Gemäß einer weiteren Ausgestaltung der Erfindung werden die Strömungshindernisse in einen Dichtring eingegossen, der z. B. in eine Flanschverbindung der Rohluftleitung eingebracht werden kann. Es ist z. B. das Eingießen eines Drahtgitterringes denkbar, der in die vom Dichtring aufgespannte Fläche hineinragt. Man kann die Strömungshindernisse, z. B. in Form von Stiften, auch in einer Gußform für den Dichtring vorsehen. Um nicht von den Materialeigenschaften des Dichtringes abhängig zu sein, kann dieser auch im Mehrkomponentenverfahren hergestellt werden.According to a further embodiment of the invention, the flow obstacles are poured into a sealing ring which, for. B. can be introduced into a flange connection of the raw air line. It is Z. B. pouring a wire mesh ring conceivable, which protrudes into the area spanned by the sealing ring. One can the flow obstacles, for. B. in the form of pins, also in a mold for the sealing ring. In order not to be dependent on the material properties of the sealing ring, it can also be manufactured using the multi-component process.
Besonders vorteilhaft ist es, die Strömungshindernisse im Abströmungsbereich einer Drosselklappe unterzubringen. Es hat sich hierbei gezeigt, daß eine wesentliche akustische Verbesserung bei gleichzeitig geringem Druckverlust erreicht werden kann, wenn die Strömungshindernisse nur in den sichelförmigen Öffnungsbereichen der Schaltklappe angeordnet sind. Damit läßt sich das bei kleinen Öffnungsspalten auftretende Pfeifgeräusch an der Drosselklappe verhindern. Selbstverständlich ist diese Maßnahme auch bei Drosselklappen anwendbar, welche keinen runden Querschnitt verschließen. Die Öffnungsspalte sind dann nicht sichelförmig, sondern weisen eine andere Geometrie auf. Eine günstige Ausführungsform der Erfindung sieht vor, die Strömungshindernisse direkt in das Drosselklappenmodul zu integrieren. Das Drosselklappenmodul kann als standardisiertes Teil kostengünstig in großen Stückzahlen hergestellt werden und an unterschiedlichen Orten z. B. im Ansaugtrakt einer Brennkraftmaschine verwendet werden.It is particularly advantageous to accommodate the flow obstacles in the outflow area of a throttle valve. It has been shown here that a substantial acoustic improvement can be achieved with a low pressure loss at the same time if the flow obstacles are only arranged in the crescent-shaped opening areas of the switching flap. This prevents the whistling noise that occurs at the throttle valve when the opening gaps are small. Of course, this measure can also be used for throttle valves which do not close a round cross section. The opening gaps are then not crescent-shaped, but have a different geometry. A favorable embodiment of the invention provides for the flow obstacles to be integrated directly into the throttle valve module. The throttle valve module can be manufactured as a standardized part inexpensively in large quantities and at different locations such. B. in the intake tract of an internal combustion engine.
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 zeigenFurther details of the invention are described in the drawings using schematic exemplary embodiments. Show here
Figur 1 den Ausschnitt einer Luftleitung mit einer direkt hinter demFigure 1 shows the detail of an air line with a directly behind the
Leitungsflansch angeordneten Drosselklappe, wobei ein mit einem Drahtgitterring ausgestatteter Dichtring als Strömungshindernis zur Anwendung kommt, im Schnitt,Throttle valve arranged in the line flange, with a sealing ring equipped with a wire mesh ring being used as a flow obstacle, on average,
Figur 2 das Detail X aus Figur 1 , welches den Aufbau des Dichtrings zeigt,FIG. 2 shows the detail X from FIG. 1, which shows the structure of the sealing ring,
Figur 3 Die Aufsicht auf ein Drosselklappenmodul, in welches Drahtsaiten alsFigure 3 The supervision of a throttle valve module, in which wire strings as
Strömungshindernis eingebracht sind undFlow obstacle are introduced and
Figur 4-5 alternative Ausgestaltung von Dichtringen mit Strömungshindernissen.Figure 4-5 alternative design of sealing rings with flow obstacles.
Beschreibung der Ausführungsbeispiele In Figur 1 ist der Ausschnitt einer Luftleitung dargestellt, die eine Flanschverbindung 10 aufweist. Die zusammengeflanschten Rohre 11 , 12 bestehen aus Kunststoff. In den Flansch des Rohres 12 ist eine Nut 13 für einen Dichtring 14 vorgesehen. Außerdem weist der Flansch Gewindemuffen 15 auf, die zur Aufnahme von Schrauben 16 dienen. Im Flansch des Rohres 11 sind entsprechende Löcher 17 vorgesehen, durch die die Schrauben 16 gesteckt sind. Das Rohr 11 weist eine montagegespritzte Drosselklappe 18 auf, wobei die Anströmrichtung der Drosselklappe durch einen Pfeil angedeutet ist.Description of the embodiments In Figure 1, the section of an air line is shown, which has a flange 10. The flanged tubes 11, 12 are made of plastic. A groove 13 for a sealing ring 14 is provided in the flange of the tube 12. In addition, the flange has threaded sockets 15, which serve to receive screws 16. Corresponding holes 17 are provided in the flange of the tube 11, through which the screws 16 are inserted. The tube 11 has an injection-molded throttle valve 18, the direction of flow of the throttle valve being indicated by an arrow.
In der dargestellten Stellung der Drosselklappe ergibt sich ein Spalt s zwischen Drosselklappenrand und Rohrwand, in dessen abströmseitigen Turbulenzbereich sich ein Drahtgitterring 19 befindet, welcher in den zur Anwendung kommenden Dichtring 14 eingegossen ist. Zwischen den Stirnseiten der Rohre 1 1 und 12 befindet sich im Bereich der Flanschverbindung 10 ein Ringspalt 20 in einer Wandung 21 der Rohrleitung. Dieser schafft den Einbauraum für den am Dichtring 14 angebrachten Drahtgitterring 19.In the position of the throttle valve shown, there is a gap s between the edge of the throttle valve and the pipe wall, in the downstream turbulence area of which there is a wire mesh ring 19 which is cast into the sealing ring 14 to be used. Between the end faces of the pipes 11 and 12 there is an annular gap 20 in a wall 21 of the pipeline in the area of the flange connection 10. This creates the installation space for the wire mesh ring 19 attached to the sealing ring 14.
Den Aufbau des Dichtringes 14 im eingebauten Zustand kann man Figur 2 entnehmen. Es ist der Ringspalt 20 zwischen den Stirnseiten der Rohre 1 1 und 12 erkennbar, wobei der Ringspalt ein Spaltmaß aufweist, weiches zu einer Deformation des Dichtringes 14 führt. Der äußere Rand des Drahtgitterringes 19 ist in den Dichtring eingegossen. Um ein Auffasern der Enden der Gitterdrähte 22 zu vermeiden ist am inneren Rand des Drahtgitterringes eine Ringmanschette 23 angesetzt, die die Drahtenden einklemmt.The structure of the sealing ring 14 in the installed state can be seen in FIG. 2. The annular gap 20 between the end faces of the pipes 11 and 12 can be seen, the annular gap having a gap dimension which leads to a deformation of the sealing ring 14. The outer edge of the wire mesh ring 19 is cast into the sealing ring. In order to avoid fraying of the ends of the grid wires 22, an annular collar 23 is attached to the inner edge of the wire grid ring and clamps the wire ends.
In Figur 3 ist ein Drosselklappenmodul 24 dargestellt. Der Aufbau des Flansches zur Befestigung an einem nicht dargestellten Rohrende entspricht im Aufbau dem des Rohres 12 aus Figur 1. Es sind unter anderem die Gewindemuffe 15 und die Nut 13 zu erkennen. Die montagegespritze Drosselklappe 18 weist eine Welle 25 auf, an die Klappenflügel 26 angebracht sind. Zum Antrieb der Welle 25 ist diese einseitig aus dem Klappenmodul 24 herausgeführt. Die Drosselklappe ist in teilweise geöffnetem Zustand dargestellt, wobei sich sichelförmige Klappendurchgänge 27 bilden. Eine Klappenkante 28 schwingt dabei direkt über Drahtsaiten 29 hinweg, die im Bereich der Klappendurchgänge 27 als Strömungshindernisse angebracht sind. Die Drahtsaiten werden bereits während des Herstellungsverfahrens des Drosselklappenmoduls in die Wandung 21 eingebracht. Dies kann z. B. durch Einspannen in die Spritzgießgießform und anschließendes Eingießen der Drahtsaiten geschehen. Eine andere Möglichkeit besteht darin, die Drahtsaiten zu erhitzen und anschließend in das fertige Drosselklappenmodul einzuschmelzen.A throttle valve module 24 is shown in FIG. The structure of the flange for fastening to a pipe end, not shown, corresponds in structure to that of the pipe 12 from FIG. 1. Among other things, the threaded sleeve 15 and the groove 13 can be seen. The injection molded throttle valve 18 has a shaft 25 to which the valve flaps 26 are attached. To drive the shaft 25, it is guided out of the flap module 24 on one side. The throttle valve is shown in a partially open state, crescent-shaped valve passages 27 being formed. A flap edge 28 swings directly over wire strings 29, which are attached in the area of the flap passages 27 as flow obstacles. The Wire strings are introduced into the wall 21 during the manufacturing process of the throttle valve module. This can e.g. B. done by clamping in the injection mold and then pouring the wire strings. Another option is to heat the wire strings and then melt them into the finished throttle valve module.
Die Figuren 4 und 5 stellen Varianten für in den Dichtring 14 eingebrachte Strömungshindernisse dar. Es ist möglich Stifte 30 in den Dichtring einzugießen. Diese können jedoch auch in der Gußform für den Ring abgebildet sein, so daß sie auf dessen Innenseite angeformt werden. Ebenfalls ist es möglich einen zickzackförmig gebogenen Draht 31 in den Dichtring 14 einzugießen. FIGS. 4 and 5 represent variants for flow obstacles introduced in the sealing ring 14. It is possible to cast pins 30 into the sealing ring. However, these can also be shown in the mold for the ring, so that they are molded onto the inside thereof. It is also possible to pour a zigzag bent wire 31 into the sealing ring 14.
BezugszeichenlisteReference list
FlanschverbindungFlange connection
Rohrpipe
Rohrpipe
Nutgroove
DichtringSealing ring
GewindemuffeThreaded sleeve
Schraubescrew
Lochhole
Drosselklappethrottle
DrahrgitterringWire mesh ring
RingspaltAnnular gap
WandungWall
GitterdrahtWire mesh
RingmanschetteRing cuff
DrosselklappenmoduThrottle valve mod
Wellewave
KlappenflügelFlap wing
KlappendurchgangValve passage
KlappenkanteFlap edge
DrahtsaiteWire string
Stiftpen
Draht wire

Claims

Patentansprüche claims
1. Luftleitung, insbesondere im Ansaugtrakt einer Brennkraftmaschine, in die Strömungshindernisse (22, 29, 30, 31 ) zur Beruhigung der Strömung im Leitungsquerschnitt vorgesehen sind, wobei die mit den Strömungshindernissen (22, 29, 30, 31 ) versehene Querschnittsfläche kleiner ist, als die des Leitungsquerschnittes, dadurch gekennzeichnet, daß diese von einer Wandung (21 ) der Luftleitung im Bereich einer Rohrverbindung in das Innere des Leitungsquerschnittes ragen.1. Air line, in particular in the intake tract of an internal combustion engine, into which flow obstacles (22, 29, 30, 31) are provided to calm the flow in the line cross section, the cross-sectional area provided with the flow obstacles (22, 29, 30, 31) being smaller, than that of the line cross section, characterized in that they protrude from a wall (21) of the air line in the area of a pipe connection into the interior of the line cross section.
2. Luftleitung nach Anspruch 1 , dadurch gekennzeichnet, daß die Strömungshindernisse (22, 29, 30, 31 ) aus einem strangförmig ausgebildeten Material, insbesondere Draht, bestehen.2. Air duct according to claim 1, characterized in that the flow obstacles (22, 29, 30, 31) consist of a strand-shaped material, in particular wire.
3. Luftleitung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Strömungshindernisse (22, 29, 30, 31 ) in die Wandung (21 ) der Luftleitung eingegossen sind.3. Air line according to one of the preceding claims, characterized in that the flow obstacles (22, 29, 30, 31) are cast into the wall (21) of the air line.
4. Luftleitung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Strömungshindernisse (22, 29, 30, 31 ) in einen Dichtring (14) eingegossen oder an ihn angegossen sind, der in eine Flanschverbindung (10) der Luftleitung eingebracht ist.4. Air line according to one of the preceding claims, characterized in that the flow obstacles (22, 29, 30, 31) are poured into or cast onto a sealing ring (14) which is introduced into a flange connection (10) of the air line.
5. Luftleitung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Strömungshindernisse (22, 29, 30, 31 ) hinter einer Drosselklappe (18) im Bereich der durch diese beeinflußten Strömung vorgesehen sind.5. Air line according to one of the preceding claims, characterized in that the flow obstacles (22, 29, 30, 31) are provided behind a throttle valve (18) in the region of the flow influenced by this.
6. Luftleitung nach Anspruch 5, dadurch gekennzeichnet, daß die Strömungshindernisse (22, 29, 30, 31 ) im Bereich hinter einem Spalt (s), der durch die um einen kleinen Winkel geöffnete Drosselklappe (18) gebildet ist, angeordnet sind. Luftleitung nach einem der Ansprüche 5 oder 6, wobei ein Drosselklappenmodul (24) Teil der Luftleitung ist, dadurch gekennzeichnet, daß in dieses die Strömungshindernisse integriert sind. 6. Air line according to claim 5, characterized in that the flow obstacles (22, 29, 30, 31) in the area behind a gap (s), which is formed by the throttle valve (18) opened by a small angle, are arranged. Air line according to one of claims 5 or 6, wherein a throttle valve module (24) is part of the air line, characterized in that the flow obstacles are integrated into this.
EP99947393A 1998-12-08 1999-09-21 Air duct, especially fitted in the air intake system of an internal combustion engine Expired - Lifetime EP1137874B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19856521A DE19856521A1 (en) 1998-12-08 1998-12-08 Air line, especially in the intake tract of an internal combustion engine
DE19856521 1998-12-08
PCT/EP1999/006975 WO2000034642A1 (en) 1998-12-08 1999-09-21 Air duct, especially fitted in the air intake system of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1137874A1 true EP1137874A1 (en) 2001-10-04
EP1137874B1 EP1137874B1 (en) 2002-11-27

Family

ID=7890335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99947393A Expired - Lifetime EP1137874B1 (en) 1998-12-08 1999-09-21 Air duct, especially fitted in the air intake system of an internal combustion engine

Country Status (6)

Country Link
US (1) US20020017275A1 (en)
EP (1) EP1137874B1 (en)
JP (1) JP4420567B2 (en)
AT (1) ATE228613T1 (en)
DE (2) DE19856521A1 (en)
WO (1) WO2000034642A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19928354A1 (en) * 1999-06-21 2000-12-28 Mann & Hummel Filter Pipe system with throttle valve
JP3726672B2 (en) * 2000-11-21 2005-12-14 トヨタ自動車株式会社 Intake noise reduction member mounting structure for internal combustion engine
JP2002295322A (en) * 2001-03-28 2002-10-09 Uchiyama Mfg Corp Fitting structure of suction noise reduction device in inlet passage
DE10308790B4 (en) * 2003-02-28 2009-07-02 Robert Bosch Gmbh Throttle body with flow-optimized inlet
JP4615463B2 (en) * 2006-03-16 2011-01-19 興国インテック株式会社 Intake noise reduction device, internal combustion engine equipped with the same, and intake noise reduction device mounting structure of the internal combustion engine
FR2949644B1 (en) 2009-09-09 2012-01-13 Bel Fromageries PROCESS FOR PRODUCING A CHEESE PRODUCT HAVING A DRY EXTRACT OF 50% OR MORE AND COMPRISING AT LEAST ONE CEREAL
JP6123953B2 (en) * 2014-11-14 2017-05-10 Nok株式会社 Intake sound reduction device

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Publication number Priority date Publication date Assignee Title
FR2257793A1 (en) * 1974-01-15 1975-08-08 Dupuy Claude Engine fuel-air mixture mixing device - has turbulence producing projections on ring clamped in mixture line
DE69805883T2 (en) * 1997-03-04 2003-02-13 Nippon Soken, Inc. Device for preventing flow noise in throttle valves
US5722357A (en) * 1997-05-01 1998-03-03 Ford Global Technologies, Inc. Noise suppression in the intake system of an internal combustion engine

Non-Patent Citations (1)

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Title
See references of WO0034642A1 *

Also Published As

Publication number Publication date
ATE228613T1 (en) 2002-12-15
DE19856521A1 (en) 2000-06-15
JP4420567B2 (en) 2010-02-24
US20020017275A1 (en) 2002-02-14
DE59903602D1 (en) 2003-01-09
WO2000034642A1 (en) 2000-06-15
EP1137874B1 (en) 2002-11-27
JP2002531767A (en) 2002-09-24

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