EP1137874B1 - 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 Download PDFInfo
- Publication number
- EP1137874B1 EP1137874B1 EP99947393A EP99947393A EP1137874B1 EP 1137874 B1 EP1137874 B1 EP 1137874B1 EP 99947393 A EP99947393 A EP 99947393A EP 99947393 A EP99947393 A EP 99947393A EP 1137874 B1 EP1137874 B1 EP 1137874B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- flow obstacles
- obstacles
- duct
- internal combustion
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000005534 acoustic noise Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
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
- the invention relates to an air line, particularly suitable for the intake tract an internal combustion engine, which has a device for calming the flow in the Has line cross-section.
- Such devices are e.g. B. from EP 0 863 303 and are in the first Line used to improve the acoustics of intake manifolds.
- the principle of operation of the device is based on the fact that there is turbulence in the flow be smoothed, and in this way in particular a separation of the flow from the pipe walls is avoided. In this way, e.g. B. the whistling sound reduced or avoided that occurs when throttle valves are opened, if they only release a small gap to the pipe wall.
- the Facilities consist, for example, of pipe inserts that go into the interior of the Reach in the suction pipe.
- the acoustic advantage of the inserted pipe inserts is due to the Buy disadvantage that this opposes the flow a resistance, which leads to loss of performance of the engine.
- the power losses contribute to one undesirable increase in the fuel consumption of the internal combustion engine.
- the pipe inserts must be inside the pipe, i.e. on a heavy one accessible place are attached, which takes the manufacturing and assembly effort explained. Casting production is also caused by a complicated one Shaping unwanted additional costs for the acoustic Measure.
- the object of the invention is therefore a device for acoustic optimization In particular to create suction pipes in which the occurring Flow losses are reduced to a minimum, with the manufacturing and assembly costs for the introduction of this device within limits to be held.
- This task is characterized by the characteristics of the Claim 1 solved.
- the air duct according to the invention which in particular in the intake tract Internal combustion engine can be installed, has to calm the flow in the Line cross-section on flow obstacles. However, these are not about the entire cable cross section, but are only on the walls attached to the pipeline. It has been shown that, in particular, to a acoustic optimization of suction pipes only the flow in the Pipe wall area must be calmed.
- the introduction z. B. a wire mesh, which extends over the entire cross-section of the line represents the flow forming inside the pipe cross-section is an unnecessary additional flow obstacle.
- the manufacturing outlay can be kept within limits.
- the the Component forming a flow obstacle can e.g. B. simply in a recording be inserted into the mold intended for the manufacture of the pipe section is integrated. Another possibility is to fix the component in place Flange area of two pipe sections during assembly.
- the flow obstacles can on the entire circumference of the tube wall certain cross-section may be attached or only to parts thereof. Should z. B the Flow separation on the inside of a pipe bend can be reduced, is sufficient it to accommodate the flow obstacles in the corresponding wall part.
- the flow obstacles consist of a strand-like material, e.g. B. wire.
- B. wire This is a cheap semi-finished product too cover and easy to process. He can advantageously in the wall of the Air line are poured.
- other materials are also conceivable z. B. porous materials. Ribs pointing radially into the inside of the pipe can also be used Mold of the tube can be provided. This is especially for Plastic suction pipes conceivable.
- the use of wire-shaped semi-finished products or Comparable materials also have the additional advantage that they become lattices Braids or similar geometries can be processed.
- massive flow obstacles set these in relation to the flow Partial area of the flow cross-section, which they cover, an essential lower flow resistance.
- the flow obstacles are on flows through and not flows around this way, which has an additional effect of Smoothing the flow in the pipe wall area behind the flow obstacles.
- the Flow obstacles poured into a sealing ring, the z. B. in a Flange connection of the raw air line can be introduced. It is Z. B. that Pouring a wire mesh ring conceivable in the spanned by the sealing ring Surface protrudes.
- Throttle valve It is particularly advantageous to avoid the flow obstacles in the outflow area Throttle valve to accommodate. It has been shown that an essential acoustic improvement with low pressure loss can be achieved can, if the flow obstacles only in the crescent-shaped opening areas the switching flap are arranged. This can be done with small opening gaps Prevent whistling noise on the throttle valve. It goes without saying this measure can also be used for throttle valves that do not round Seal cross section. The opening gaps are then not sickle-shaped, but rather have a different geometry.
- a favorable embodiment of the invention provides for the flow obstacles can be integrated directly into the throttle valve module.
- the throttle valve module can be inexpensively manufactured in large quantities as a standardized part and at different places e.g. B. in the intake tract of an internal combustion engine be used.
- the section of an air line is shown, the flange connection 10 has.
- the flanged tubes 11, 12 are made of plastic.
- the flange of the tube 12 is provided with a groove 13 for a sealing ring 14.
- the flange has threaded sleeves 15, which are used to receive Serve screws 16.
- Corresponding holes 17 are in the flange of the tube 11 provided through which the screws 16 are inserted.
- the tube 11 has one assembly-injected throttle valve 18, the flow direction of the Throttle valve is indicated by an arrow.
- the structure of the sealing ring 14 in the installed state can be seen in FIG. 2 remove. It is the annular gap 20 between the end faces of the tubes 11 and 12 recognizable, wherein the annular gap has a gap dimension which leads to a Deformation of the sealing ring 14 leads.
- the outer edge of the wire mesh ring 19 is poured into the sealing ring. To unravel the ends of the grid wires 22 Avoid a ring collar 23 on the inner edge of the wire mesh ring that pinches the wire ends.
- a throttle valve module 24 is shown in FIG.
- the structure of the flange Attachment to a pipe end, not shown, corresponds in structure to that of the Tube 12 from Figure 1.
- the injection molded throttle valve 18 has a shaft 25 to which Flap wings 26 are attached. To drive the shaft 25, this is one-sided the flap module 24 led out.
- the throttle valve is partially open State shown, crescent-shaped valve passages 27 are formed.
- a Flap edge 28 swings directly over wire strings 29 in the area the valve passages 27 are attached as flow obstacles.
- the Wire strings are used during the manufacturing process of the throttle valve module introduced into the wall 21. This can e.g. B. by clamping in the injection mold and then pouring the wire strings happen. Another option is to heat the wire strings and then melt into the finished throttle valve module.
- Figures 4 and 5 represent variants for introduced into the sealing ring 14 Flow obstacles. It is possible to pour pins 30 into the sealing ring. However, these can also be shown in the mold for the ring, so that they molded on the inside. It is also possible to use one Pour zigzag bent wire 31 into the sealing ring 14.
Abstract
Description
Die Erfindung betrifft eine Luftleitung, insbesondere geeignet für den Ansaugtrakt einer Brennkraftmaschine, die eine Einrichtung zur Beruhigung der Strömung im Leitungsquerschnitt aufweist.The invention relates to an air line, particularly suitable for the intake tract an internal combustion engine, which has a device for calming the flow in the Has line cross-section.
Derartige Einrichtungen sind z. B. aus der EP 0 863 303 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 Rohrwänden vermieden wird. Auf diese Weise kann z. B. das Pfeifgeräusch vermindert oder vermieden werden, das beim Öffnen von Drosselklappen auftritt, wenn diese lediglich einen schmalen Spalt zur Rohrwand freigeben. Die Einrichtungen bestehen beispielsweise aus Rohreinsätzen, die in das Innere des Saugrohres hineinreichen.Such devices are e.g. B. from EP 0 863 303 and are in the first Line used to improve the acoustics of intake manifolds. The The principle of operation of the device is based on the fact that there is turbulence in the flow be smoothed, and in this way in particular a separation of the flow from the pipe walls is avoided. In this way, e.g. B. the whistling sound reduced or avoided that occurs when throttle valves are opened, if they only release a small gap to the pipe wall. The Facilities consist, for example, of pipe inserts that go into the interior of the Reach in the suction pipe.
Der akustische Vorteil der eingebrachten Rohreinsätze wird jedoch durch den Nachteil erkauft, daß dieses der Strömung einen Widerstand entgegensetzt, welcher zu Leistungsverlusten des Motors führt. Die Leistungsverluste tragen zu einem unerwünschten Ansteigen des Kraftstoffverbrauches der Brennkraftmaschine bei. Außerdem müssen die Rohreinsätze im Inneren des Rohres, also an einer schwer zugänglichen Stelle angebracht werden, was den Fertigungs- und Montageaufwand erklärt. Auch eine gußtechnische Herstellung verursacht durch eine komplizierte Formgestaltung unerwünschte Zusatzkosten für die genannte akustische Maßnahme. However, the acoustic advantage of the inserted pipe inserts is due to the Buy disadvantage that this opposes the flow a resistance, which leads to loss of performance of the engine. The power losses contribute to one undesirable increase in the fuel consumption of the internal combustion engine. In addition, the pipe inserts must be inside the pipe, i.e. on a heavy one accessible place are attached, which takes the manufacturing and assembly effort explained. Casting production is also caused by a complicated one Shaping unwanted additional costs for the acoustic Measure.
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 object of the invention is therefore a device for acoustic optimization In particular to create suction pipes in which the occurring Flow losses are reduced to a minimum, with the manufacturing and assembly costs for the introduction of this device within limits to be held. This task is characterized by the characteristics of the Claim 1 solved.
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 duct according to the invention, which in particular in the intake tract Internal combustion engine can be installed, has to calm the flow in the Line cross-section on flow obstacles. However, these are not about the entire cable cross section, but are only on the walls attached to the pipeline. It has been shown that, in particular, to a acoustic optimization of suction pipes only the flow in the Pipe wall area must be calmed. The introduction z. B. a wire mesh, which extends over the entire cross-section of the line represents the flow forming inside the pipe cross-section is an unnecessary additional flow obstacle.
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 the Component forming a flow obstacle can e.g. B. simply in a recording be inserted into the mold intended for the manufacture of the pipe section is integrated. Another possibility is to fix the component in place 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. The flow obstacles can on the entire circumference of the tube wall certain cross-section may be attached or only to parts thereof. Should z. B the Flow separation on the inside of a pipe bend can be reduced, is sufficient it to accommodate the flow obstacles in the corresponding wall part.
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.According to a special embodiment, the flow obstacles consist of a strand-like material, e.g. B. wire. This is a cheap semi-finished product too cover and easy to process. He can advantageously in the wall of the Air line are poured. However, other materials are also conceivable z. B. porous materials. Ribs pointing radially into the inside of the pipe can also be used Mold of the tube can be provided. This is especially for Plastic suction pipes conceivable. The use of wire-shaped semi-finished products or Comparable materials also have the additional advantage that they become lattices Braids or similar geometries can be processed. Compared to massive flow obstacles set these in relation to the flow Partial area of the flow cross-section, which they cover, an essential lower flow resistance. The flow obstacles are on flows through and not flows around this way, 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 poured into a sealing ring, the z. B. in a Flange connection of the raw air line can be introduced. It is Z. B. that Pouring a wire mesh ring conceivable in the spanned by the sealing ring Surface protrudes. One can the flow obstacles, for. B. in the form of pens, also provide in a mold for the sealing ring. Not from the To be dependent on the material properties of the sealing ring, this can also be in the Multi-component processes are manufactured.
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. It is particularly advantageous to avoid the flow obstacles in the outflow area Throttle valve to accommodate. It has been shown that an essential acoustic improvement with low pressure loss can be achieved can, if the flow obstacles only in the crescent-shaped opening areas the switching flap are arranged. This can be done with small opening gaps Prevent whistling noise on the throttle valve. It goes without saying this measure can also be used for throttle valves that do not round Seal cross section. The opening gaps are then not sickle-shaped, but rather have a different geometry.
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.A favorable embodiment of the invention provides for the flow obstacles can be integrated directly into the throttle valve module. The throttle valve module can can be inexpensively manufactured in large quantities as a standardized part and at different places e.g. B. in the intake tract of an internal combustion engine be used.
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 other features of preferred developments of the invention go in addition to the claims and the description and drawings the individual features stand alone or in several Form of sub-combinations in the embodiment of the invention and on be realized in other areas and advantageous as well as protectable Can represent versions for which protection is claimed here.
Weitere Einzelheiten der Erfindung werden in den Zeichnungen anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigen
- Figur 1
- den Ausschnitt einer Luftleitung mit einer direkt hinter dem Leitungsflansch angeordneten Drosselklappe, wobei ein mit einem Drahtgitterring ausgestatteter Dichtring als Strömungshindernis zur Anwendung kommt, im Schnitt,
- Figur 2
- das Detail X aus Figur 1, welches den Aufbau des Dichtrings zeigt,
- Figur 3
- Die Aufsicht auf ein Drosselklappenmodul, in weiches Drahtsaiten als Strömungshindernis eingebracht sind und
- Figur 4-5
- alternative Ausgestaltung von Dichtringen mit Strömungshindernissen.
- Figure 1
- the section of an air line with a throttle valve arranged directly behind the line flange, a sealing ring equipped with a wire mesh ring being used as an obstacle to flow, on average,
- Figure 2
- detail X from FIG. 1, which shows the structure of the sealing ring,
- Figure 3
- The supervision of a throttle valve module, in which soft wire strings are introduced as a flow obstacle and
- Figure 4-5
- alternative design of sealing rings with flow obstacles.
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.In Figure 1, the section of an air line is shown, the
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 11 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
Throttle valve edge and pipe wall, in its downstream turbulence area
there is a
Den Aufbau des Dichtringes 14 im eingebauten Zustand kann man Figur 2
entnehmen. Es ist der Ringspalt 20 zwischen den Stirnseiten der Rohre 11 und 12
erkennbar, wobei der Ringspalt ein Spaltmaß aufweist, welches 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
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 Drosselklappenmoduis
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
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. Figures 4 and 5 represent variants for introduced into the sealing
- 1010
- Flanschverbindungflange
- 1111
- Rohrpipe
- 1212
- Rohrpipe
- 1313
- Nutgroove
- 1414
- Dichtringseal
- 1515
- Gewindemuffethreaded socket
- 1616
- Schraubescrew
- 1717
- Lochhole
- 1818
- Drosselklappethrottle
- 1919
- DrahrgitterringDrahrgitterring
- 2020
- Ringspaltannular gap
- 2121
- Wandungwall
- 2222
- Gitterdrahtgrid wire
- 2323
- Ringmanschetteannular collar
- 2424
- Drosselklappenmodulthrottle module
- 2525
- Wellewave
- 2626
- Klappenflügelflap wings
- 2727
- KlappendurchgangFold passage
- 2828
- Klappenkanteflap edge
- 2929
- Drahtsaitewire string
- 3030
- Stiftpen
- 3131
- Drahtwire
Claims (4)
- Air conduit, more especially in the intake duct of an internal combustion engine, in which conduit flow obstacles (22, 29, 30, 31) are provided to calm the flow in the output cross-section, the area of cross-section, which is provided with the flow obstacles (22, 29, 30, 31), being smaller than that area of the output cross-section, said obstacles protruding from a wall (21) of the air conduit in the region of a pipe connection into the interior of the output cross-section, characterised in that the flow obstacles (22, 29, 30, 31) are incorporated in a sealing ring (14) or are integrally moulded on said ring, which is inserted into the pipe connection.
- Air conduit according to claim 1, characterised in that the flow obstacles (22, 29, 30, 31) are formed from a strand-like material, more especially wire.
- Air conduit according to one of the previous claims, characterised in that the flow obstacles (22, 29, 30, 31) are provided downstream of a throttle valve (18) in the region of the flow which is influenced by said valve.
- Air conduit according to claim 3, characterised in that the flow obstacles (22, 29, 30, 31) are disposed in the region behind a gap which is formed by the throttle valve (18) when it is opened by a small angle.
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 EP1137874A1 (en) | 2001-10-04 |
| EP1137874B1 true 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)
| 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 |
Family Cites Families (3)
| 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 | 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 |
-
1998
- 1998-12-08 DE DE19856521A patent/DE19856521A1/en not_active Withdrawn
-
1999
- 1999-09-21 JP JP2000587066A patent/JP4420567B2/en not_active Expired - Lifetime
- 1999-09-21 AT AT99947393T patent/ATE228613T1/en not_active IP Right Cessation
- 1999-09-21 DE DE59903602T patent/DE59903602D1/en not_active Expired - Lifetime
- 1999-09-21 WO PCT/EP1999/006975 patent/WO2000034642A1/en active IP Right Grant
- 1999-09-21 EP EP99947393A patent/EP1137874B1/en not_active Expired - Lifetime
-
2001
- 2001-06-07 US US09/875,291 patent/US20020017275A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JP4420567B2 (en) | 2010-02-24 |
| ATE228613T1 (en) | 2002-12-15 |
| JP2002531767A (en) | 2002-09-24 |
| EP1137874A1 (en) | 2001-10-04 |
| DE19856521A1 (en) | 2000-06-15 |
| US20020017275A1 (en) | 2002-02-14 |
| WO2000034642A1 (en) | 2000-06-15 |
| DE59903602D1 (en) | 2003-01-09 |
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