EP1400662A1 - Silencer with resonator - Google Patents

Silencer with resonator Download PDF

Info

Publication number
EP1400662A1
EP1400662A1 EP03103301A EP03103301A EP1400662A1 EP 1400662 A1 EP1400662 A1 EP 1400662A1 EP 03103301 A EP03103301 A EP 03103301A EP 03103301 A EP03103301 A EP 03103301A EP 1400662 A1 EP1400662 A1 EP 1400662A1
Authority
EP
European Patent Office
Prior art keywords
silencer
perforated plate
wall thickness
silencer according
combustion engine
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
EP03103301A
Other languages
German (de)
French (fr)
Other versions
EP1400662B1 (en
Inventor
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
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 Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1400662A1 publication Critical patent/EP1400662A1/en
Application granted granted Critical
Publication of EP1400662B1 publication Critical patent/EP1400662B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/023—Helmholtz resonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F02M35/1261—Helmholtz resonators
    • 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
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/18—Methods or apparatus for fitting, inserting or repairing different elements by using quick-active type locking mechanisms, e.g. clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/28—Methods or apparatus for fitting, inserting or repairing different elements by using adhesive material, e.g. cement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/40—Retrofitting exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/18—Plastics material, e.g. polyester resin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust

Definitions

  • the invention relates to a silencer according to the preamble of claim 1.
  • the object of the invention is to avoid the disadvantages listed above and one To create a silencer that is easy to manufacture, takes up little space and has a very large variability in the frequency range to be damped. This object is solved by the features of claim 1.
  • the silencer according to the invention works on the principle of a Helmholtz resonator, at least one sound-conducting element of this silencer at least contains a resonator chamber through a perforated plate from the corresponding Flow channel is separated.
  • the perforated plate can be in the form of a tube or another self-contained element or just suitable as a fragment be designed to separate the resonator chamber and the flow-carrying channel.
  • the perforated plate has at least in the direct region of the holes arranged therein a hole changed compared to the remaining wall thickness of the perforated plate Wall thickness. In this way, the frequency range to be attenuated control better without appreciably increasing the duration and vibration resistance of the perforated plate influence.
  • the changed wall thickness can be found in at least one hole in the perforated plate through subsequent measures, such as B. Sinks, loops and other in the state of Implement technology known measures.
  • the perforated plate can be made of metal; however, it is also conceivable that it consists of an injection-moldable material and that changed wall thicknesses in the area of at least one hole by appropriate Design of the injection mold is produced.
  • the cross-sectional shape of the im Perforated plate arranged holes can be selected regardless of the changed wall thickness and be executed. Because the length of the resonator neck, i.e.
  • the depth of the Hole is varied in comparison to the perforated plate thickness, can be done in the smallest space implement a broader frequency range to be damped.
  • This can preferably be done Muffler in an internal combustion engine, especially a supercharged internal combustion engine deploy. But it is quite conceivable to use this silencer in other Arrange known sound-conducting lines or devices. Compressed air lines are an example here.
  • An embodiment of the silencer according to the invention is characterized in that that the changed wall thickness through a conical depression with a defined Angle between the countersunk surfaces is realized.
  • the damped frequency is dependent on this on the angle between the countersinks. The bigger the between the countersinks included angle, the higher the frequency to be damped.
  • the reduction can on the side leading to the chamber or on the side leading to the flow channel Be arranged side of the perforated plate. It is preferably in the direction of the resonator chamber educated.
  • the change in the wall thickness in the direct area of the holes arranged therein through a, comprising at least one step, the wall thickness can be gradually reduced.
  • the number of Levels here can be chosen arbitrarily and depends on the desired one damping frequency range and the existing wall thickness in the perforated plate.
  • the preferred one-step variant of reducing the wall thickness results in the advantage a precisely defined new resonator neck length.
  • the wall thickness can be reduced in a further embodiment by an essentially hemispherical countersink.
  • Another possibility to change the wall thickness in the hole area of interest is a hole-congruent casing or integration of at least one other perforated plate.
  • the further perforated plate must correspond to the first perforated plate Have shape and is directly with exact hole coverage by means of adhesive process, Welding process, clip process or other known in the art Connection types connected to the first perforated plate. Proves to be advantageous the associated retrofit or retrofit option of an existing one Silencer.
  • the silencer according to the invention is in a flow line of an internal combustion engine between an exhaust gas turbocharger and a charge air cooling arranged.
  • the silencer is preferred near the largest sound-emitting source, namely the exhaust gas turbocharger.
  • the muffler has the same cross-section as the flow line and is used between the exhaust gas turbocharger and the flow line to the charge air cooler.
  • the silencer according to the invention is the flow line between exhaust gas turbocharger and intercooler itself.
  • the silencer according to the invention is in a sound-conducting element inside an exhaust gas turbocharger of an internal combustion engine arranged.
  • an exhaust gas turbocharger of an internal combustion engine arranged.
  • the silencer according to the invention is in a sound-conducting element inside an exhaust gas turbocharger of an internal combustion engine arranged.
  • the silencer according to the invention is a use in or on all sound-conducting parts of the exhaust gas turbocharger conceivable and possible.
  • the Silencers individually or in combination with other silencers in different Positions are used.
  • the silencer according to the invention in a sound-conducting element in an exhaust pipe of the internal combustion engine arranged. Since there are also sound waves in certain frequency ranges on the exhaust side to dampen, it is also possible to use this silencer on one or to arrange several points in the exhaust pipe system.
  • the silencer can serve as a flange connection between two line parts or in the Line be integrated.
  • the silencer according to the invention can be used in combination can be combined with other mufflers known in the prior art.
  • Another embodiment of the invention is characterized in that the silencer with a combination of rows of holes with different wall thicknesses of the Perforated sheet is provided for broadband sound absorption. Because of the different Wall thicknesses in the area of individual holes or rows of holes can be a particular one attenuate a wide range of frequencies. The different wall thicknesses can as described above through subsequent processing or already in the manufacturing process of the perforated plate can be achieved.
  • the muffler is preferably a combination here of rows of holes with different wall thicknesses of the perforated plate have the rows of holes.
  • At least one sound-conducting element at least contains a chamber through a perforated plate from the corresponding flow channel is separated and thus constructed according to the principle of a Helmholtz resonator is to provide.
  • the perforated plate in the direct area of the holes arranged therein have a conical countersink for each hole, the Angle between the countersinks is between 60 and 150 °.
  • the resonator tube is made of metal and the depressions are mechanically introduced from the outside.
  • the wall thickness is Perforated sheet in the non-countersunk areas between 0.5 and 5 mm and the hole diameter between 1 and 20 mm.
  • this silencer it is also advantageous for this silencer to have the ratio between the chamber volume and the sum of the perforated sheets between 4 and 40 cm 3 per cm 2 .
  • the silencer according to the invention is advantageously used in an internal combustion engine used at least one exhaust gas turbocharger, where it is on the intake side and / or exhaust side can be used.
  • FIG. 1 shows a schematic view of an embodiment of the invention.
  • a silencer 10 consisting of a perforated plate 11 and a resonator chamber wall 14.
  • the perforated plate 11 has a substantially cylindrical shape and separates the flow channel running inside the perforated plate 11 from two Resonator chambers 13a, 13b. These are by the perforated plate 11 in the radial Spacing surrounding resonator chamber wall 14 is formed, the chambers 13a, 13b be separated from each other by a partition 15.
  • perforated plate 11 has cutouts 12 which are used to produce the Helmholtz effect serve and are distributed over the entire scope.
  • the recesses 12 are countersunk in the perforated plate 11 in the direction of the resonator chamber wall 14 the two rows of holes each have a different countersink angle. This gives there is broadband attenuation of the emitted sound because of the different Different resonator neck lengths can be achieved.
  • the perforated plate 11 made of metal with options at the respective ends to be connected to further pipeline parts or an exhaust gas turbocharger.
  • the resonator chamber wall consists of a plastic, such as Polyamide 6.6 (PA 6.6) and is sealed with the perforated sheet via gluing or other in the prior art known connection method connected.
  • the cutouts in the recesses 12 are mechanically connected between the perforated plate 11 and the resonator chamber wall 14, with defined countersink angles. Due to the subsidence, the effective one gives way Resonator neck length from the original resonator neck length, namely the perforated plate wall thickness s, down.
  • FIG. 2 shows the relationship between countersink angle ⁇ and resonator neck length s. Components corresponding to FIG. 1 are provided with the same reference symbols.
  • FIG. 2 shows 3 sections of the perforated plate 11 in the area of the cutouts 12, each with different countersinks and different countersink angles ⁇ i .
  • the lower section according to FIG. 2c shows a perforated plate 11 in the region of a recess 12, which has no countersink, which corresponds to the prior art, and the effective resonator neck length s i corresponds to the wall thickness s of the perforated plate 11.
  • One way to increase the frequency to be damped is to reduce the effective resonator neck length s i .
  • FIG. 2b again shows a perforated plate 11 in the region of a recess 12 with a depression at the depression angle ⁇ 2 .
  • the countersink angle ⁇ i has been increased to a countersink angle ⁇ 1 compared to the middle section. Due to the increased angle of depression ⁇ 1 , there is again a reduced resonator neck length s 1 .
  • FIG. 3 The effects of the reduction of the effective resonator neck length s i on the frequency F to be damped are shown in FIG. 3.
  • the basic effect of Helmholtz resonators with a damping factor of over 20 dB compared to a line with the same diameter without a silencer according to the X curve can be clearly seen. Furthermore, there is a shift in the attenuated frequencies with different or no reductions in the area of the cutouts 12 of the perforated plate 11.
  • the muffler tested has a full row of holes with an equally full, concentric resonator chamber. If the recesses are reduced compared to the recesses that are not recessed, the damped frequency shifts in the direction of the higher frequencies.

Abstract

The silencer consists of a sleeve (11) inserted in the exhaust pipe that has an integral Helmholz resonator. This has a number of chambers (13) coupled by tapered orifices (12). The greater the included angle of the taper the thinner the wall section (s) of the sleeve tube for a required resonance frequency.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Schalldämpfer nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a silencer according to the preamble of claim 1.

Aus der DE 198 18 873 ist ein Schalldämpfer für eine Brennkraftmaschine mit einem Abgasturbolader und nachgeordnetem Ladeluftkühler bekannt. Dieser basiert auf dem Prinzip eines Helmholtz-Resonators und enthält wenigstens eine Kammer, die durch ein Lochblech vom zugeordneten Strömungskanal getrennt ist. Dabei kann dieser Schalldämpfer im Abgasturbolader oder in den zu- oder abführenden Strömungskanälen angeordnet sein. Die Lochtiefe und damit die wirksame Resonatorhalslänge wird allein über die konstante Blechdicke des Lochblechs bestimmt. Hier ergibt sich der Nachteil, dass bei dem gewünschten zu dämpfenden Frequenzbereich auf Grund des oft sehr geringen zur Verfügung stehenden Bauraums und der durch die Stärke des Lochblechs fest vorgegebene Resonatorhalslänge ein Kompromiss eingegangen werden muss.DE 198 18 873 discloses a silencer for an internal combustion engine with an exhaust gas turbocharger and downstream charge air cooler known. This is based on the principle of a Helmholtz resonator and contains at least one chamber through one Perforated plate is separated from the assigned flow channel. This silencer can arranged in the exhaust gas turbocharger or in the inlet or outlet flow channels his. The hole depth and thus the effective length of the resonator neck is determined solely by determines the constant sheet thickness of the perforated sheet. The disadvantage here is that at the desired frequency range to be damped due to the often very small available space and the fixed by the thickness of the perforated plate A resonance neck length must be compromised.

Die Aufgabe der Erfindung ist es, die oben aufgeführten Nachteile zu vermeiden und einen Schalldämpfer zu schaffen, der leicht herzustellen ist, einen geringen Bauraum einnimmt und eine sehr große Variabilität bei dem zu dämpfenden Frequenzbereich besitzt. Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.The object of the invention is to avoid the disadvantages listed above and one To create a silencer that is easy to manufacture, takes up little space and has a very large variability in the frequency range to be damped. This object is solved by the features of claim 1.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Schalldämpfer arbeitet nach dem Prinzip eines Helmholtz-Resonators, wobei wenigstens ein schallführendes Element dieses Schalldämpfers wenigstens eine Resonatorkammer enthält, die durch ein Lochblech vom korrespondierenden Strömungskanal getrennt ist. Das Lochblech kann hierbei in Form einer Röhre oder eines sonstigen in sich geschlossenen Elementes oder auch nur als Fragment geeignet zur Trennung von Resonatorkammer und strömungsführendem Kanal ausgeführt sein. Hierbei weist das Lochblech im direkten Bereich der darin angeordneten Löcher an wenigstens einem Loch eine im Vergleich zur restlichen Wanddicke des Lochblechs veränderte Wandstärke auf. Auf diese Weise lässt sich der zu dämpfende Frequenzbereich besser steuern, ohne die Dauer und Schwingfestigkeit des Lochblechs nennenswert zu beeinflussen. Ebenso vorteilhaft ist hier, dass mit nur einem Lochblech viele verschiedene Schalldämpfer mit entsprechenden Dämpfungscharakteristiken realisiert werden können. So lässt sich die veränderte Wandstärke an wenigstens einem Loch des Lochblechs durch nachträgliche Maßnahmen, wie z. B. Senken, Schleifen und sonstige im Stand der Technik bekannte Maßnahmen realisieren. Das Lochblech kann hierfür aus Metall sein; es ist jedoch auch denkbar, dass es aus einem spritzgießfähigen Material besteht und die veränderten Wandstärken im Bereich wenigstens eines Loches durch entsprechende Auslegung des Spritzgießwerkzeuges hergestellt wird. Die Querschnittsform der im Lochblech angeordneten Löcher kann unabhängig von der veränderten Wandstärke gewählt und ausgeführt werden. Dadurch, dass die Resonatorhalslänge, also die Tiefe des Loches im Vergleich zur Lochblechstärke variiert wird, lässt sich so auf geringstem Raum ein breiter zu dämpfender Frequenzbereich realisieren. Vorzugsweise lässt sich dieser Schalldämpfer in einer Brennkraftmaschine, speziell einer aufgeladenen Brennkraftmaschine einsetzen. Es ist aber durchaus denkbar, diesen Schalldämpfer in weiteren im Stand der Technik bekannten schallführenden Leitungen bzw. Vorrichtungen anzuordnen. Hier sind als Beispiel Druckluftleitungen zu nennen.The silencer according to the invention works on the principle of a Helmholtz resonator, at least one sound-conducting element of this silencer at least contains a resonator chamber through a perforated plate from the corresponding Flow channel is separated. The perforated plate can be in the form of a tube or another self-contained element or just suitable as a fragment be designed to separate the resonator chamber and the flow-carrying channel. Here, the perforated plate has at least in the direct region of the holes arranged therein a hole changed compared to the remaining wall thickness of the perforated plate Wall thickness. In this way, the frequency range to be attenuated control better without appreciably increasing the duration and vibration resistance of the perforated plate influence. It is also advantageous here that with just one perforated plate, many different ones Silencers with appropriate damping characteristics can be realized. The changed wall thickness can be found in at least one hole in the perforated plate through subsequent measures, such as B. Sinks, loops and other in the state of Implement technology known measures. The perforated plate can be made of metal; however, it is also conceivable that it consists of an injection-moldable material and that changed wall thicknesses in the area of at least one hole by appropriate Design of the injection mold is produced. The cross-sectional shape of the im Perforated plate arranged holes can be selected regardless of the changed wall thickness and be executed. Because the length of the resonator neck, i.e. the depth of the Hole is varied in comparison to the perforated plate thickness, can be done in the smallest space implement a broader frequency range to be damped. This can preferably be done Muffler in an internal combustion engine, especially a supercharged internal combustion engine deploy. But it is quite conceivable to use this silencer in other Arrange known sound-conducting lines or devices. Compressed air lines are an example here.

Eine Ausgestaltung des erfindungsgemäßen Schalldämpfers zeichnet sich dadurch aus, dass die veränderte Wandstärke durch eine kegelförmige Senkung mit einem definierten Winkel zwischen den Senkflächen realisiert ist. Hierbei ist die gedämpfte Frequenz abhängig vom Winkel zwischen den Senkflächen. Je größer der zwischen den Senkflächen eingeschlossene Winkel ist, desto höher ist die zu dämpfende Frequenz. Die Senkung kann auf der zur Kammer hin führenden Seite oder auf der zum Strömungskanal führenden Seite des Lochblechs angeordnet sein. Bevorzugt ist sie in Richtung der Resonatorkammer ausgebildet.An embodiment of the silencer according to the invention is characterized in that that the changed wall thickness through a conical depression with a defined Angle between the countersunk surfaces is realized. The damped frequency is dependent on this on the angle between the countersinks. The bigger the between the countersinks included angle, the higher the frequency to be damped. The reduction can on the side leading to the chamber or on the side leading to the flow channel Be arranged side of the perforated plate. It is preferably in the direction of the resonator chamber educated.

In einer weiteren Ausgestaltung der Erfindung kann die Veränderung der Wandstärke im direkten Bereich der darin angeordneten Löcher durch eine, wenigstens eine Stufe umfassende, stufenweise Verringerung der Wandstärke realisiert werden. Die Anzahl der Stufen hierbei kann beliebig gewählt werden und ist abhängig von dem gewünschten zu dämpfenden Frequenzbereich und der im Lochblech vorhandenen Wandstärke. In der bevorzugten einstufigen Variante der Verringerung der Wandstärke ergibt sich der Vorteil einer exakt definierten neuen Resonatorhalslänge.In a further embodiment of the invention, the change in the wall thickness in the direct area of the holes arranged therein through a, comprising at least one step, the wall thickness can be gradually reduced. The number of Levels here can be chosen arbitrarily and depends on the desired one damping frequency range and the existing wall thickness in the perforated plate. In the preferred one-step variant of reducing the wall thickness results in the advantage a precisely defined new resonator neck length.

Weiterhin lässt sich eine Verringerung der Wandstärke in einer weiteren Ausgestaltung durch eine im wesentlichen halbkugelförmige Senkung realisieren. Durch empirische Versuche lässt sich der wirksame Frequenzbereich des Dämpfers in Abhängigkeit des Kugeldurchmessers feststellen.Furthermore, the wall thickness can be reduced in a further embodiment by an essentially hemispherical countersink. By empirical The effective frequency range of the damper can be tested as a function of Determine the ball diameter.

Die oben dargestellten Verringerungen der Wandstärke im direkten Bereich wenigstens eines Loches im Lochblech sind durch die einfache Realisierung durch im Stand der Technik bekannte Senkmittel oder durch besondere Ausformungen des Spritzgießwerkzeuges gekennzeichnet. Ebenso lässt sich jedoch eine Ausgestaltung der Erfindung realisieren, die durch eine gezielte Materialanhäufung im Bereich der im Lochblech angeordneten Löcher gekennzeichnet ist. Auch durch eine Vergrößerung der Wandstärke im Bereich der Resonatorlöcher lässt sich eine Verschiebung des wirksamen Frequenzbereiches erreichen. Die Wandmaterialanhäufung kann durch eine besondere Ausformung des Spritzgießwerkzeuges oder sonstige im Stand der Technik bekannte Maßnahmen in der Metallverarbeitung zur lokalen Verstärkung von Wandbereichen realisiert werden.The above-mentioned reductions in wall thickness in the direct area at least a hole in the perforated plate are due to the simple implementation in the state of the Lowering agents known in the art or through special shapes of the injection molding tool characterized. However, an embodiment of the invention can also be implemented, through a targeted material accumulation in the area of the arranged in the perforated plate Holes is marked. Also by increasing the wall thickness in the area the resonator holes allows a shift in the effective frequency range to reach. The wall material can accumulate through a special shape of the injection mold or other measures known in the prior art metal processing for local reinforcement of wall areas.

Eine weitere Möglichkeit, die Wandstärke im interessierenden Lochbereich zu verändern, ist eine lochkongruente Ummantelung oder Einbindung wenigstens eines weiteren Lochblechs. Hierbei muss das weitere Lochblech eine zum ersten Lochblech korrespondierende Form aufweisen und wird direkt mit exakter Lochüberdeckung mittels Klebeverfahren, Schweißverfahren, Clipsverfahren oder über sonstige im Stand der Technik bekannte Verbindungsarten mit dem ersten Lochblech verbunden. Als vorteilhaft erweist sich hier die damit verbundene Nachrüst- bzw. Umrüstmöglichkeit eines vorhandenen Schalldämpfers.Another possibility to change the wall thickness in the hole area of interest, is a hole-congruent casing or integration of at least one other perforated plate. Here, the further perforated plate must correspond to the first perforated plate Have shape and is directly with exact hole coverage by means of adhesive process, Welding process, clip process or other known in the art Connection types connected to the first perforated plate. Proves to be advantageous the associated retrofit or retrofit option of an existing one Silencer.

Gemäß einer Ausgestaltung der Erfindung ist der erfindungsgemäße Schalldämpfer in eine Strömungsleitung einer Brennkraftmaschine zwischen einem Abgasturbolader und einer Ladeluftkühlung angeordnet. Hier wird der Schalldämpfer bevorzugt nahe der größten schallabgebenden Quelle, nämlich dem Abgasturbolader, angeordnet. Vorzugsweise besitzt der Schalldämpfer hier den gleichen Querschnitt wie die Strömungsleitung und wird zwischen Abgasturbolader und Strömungsleitung zum Ladeluftkühler eingesetzt. Alternativ lässt sich denken, dass der erfindungsgemäße Schalldämpfer die Strömungsleitung zwischen Abgasturbolader und Ladeluftkühler selbst darstellt.According to one embodiment of the invention, the silencer according to the invention is in a flow line of an internal combustion engine between an exhaust gas turbocharger and a charge air cooling arranged. Here the silencer is preferred near the largest sound-emitting source, namely the exhaust gas turbocharger. Preferably here the muffler has the same cross-section as the flow line and is used between the exhaust gas turbocharger and the flow line to the charge air cooler. Alternatively, it can be thought that the silencer according to the invention is the flow line between exhaust gas turbocharger and intercooler itself.

In einer weiteren Ausgestaltung der Erfindung ist der erfindungsgemäße Schalldämpfer in einem schallführenden Element im Inneren eines Abgasturboladers einer Brennkraftmaschine angeordnet. Hier ist eine Nutzung in oder an sämtlichen schallführenden Teilen des Abgasturboladers denkbar und möglich. Beispielsweise sind hier Ein- oder Auslass des Verdichters inklusive der damit verbundenen Leitungen oder auch Ein- oder Auslass der Turbine mit den damit zusammengehörenden Leitungen zu nennen. Hierbei kann der Schalldämpfer einzeln oder in Kombination mit weiteren Schalldämpfern in verschiedenen Positionen eingesetzt werden.In a further embodiment of the invention, the silencer according to the invention is in a sound-conducting element inside an exhaust gas turbocharger of an internal combustion engine arranged. Here is a use in or on all sound-conducting parts of the exhaust gas turbocharger conceivable and possible. For example, there are inlet or outlet of the compressor including the connected lines or inlet or outlet the turbine with the associated lines. Here, the Silencers individually or in combination with other silencers in different Positions are used.

Gemäß einer weiteren Ausgestaltung der Erfindung ist der erfindungsgemäße Schalldämpfer in einem schallführenden Element in einer abgasseitigen Leitung der Brennkraftmaschine angeordnet. Da abgasseitig ebenfalls Schallwellen in bestimmten Frequenzbereichen zu dämpfen sind, ist es ebenso möglich, diesen Schalldämpfer an einem oder mehreren Punkten im Abgasleitungssystem anzuordnen. Dabei kann der Schalldämpfer als Flanschverbindung zwischen zwei Leitungsteilen dienen oder aber in die Leitung integriert sein. Weiterhin kann der erfindungsgemäße Schalldämpfer in Kombination mit sonstigen im Stand der Technik bekannten Schalldämpfern kombiniert werden.According to a further embodiment of the invention, the silencer according to the invention in a sound-conducting element in an exhaust pipe of the internal combustion engine arranged. Since there are also sound waves in certain frequency ranges on the exhaust side to dampen, it is also possible to use this silencer on one or to arrange several points in the exhaust pipe system. The silencer can serve as a flange connection between two line parts or in the Line be integrated. Furthermore, the silencer according to the invention can be used in combination can be combined with other mufflers known in the prior art.

Eine weitere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass der Schalldämpfer mit einer Kombination von Lochreihen mit unterschiedlichen Wandstärken des Lochblechs zur breitbandigeren Schalldämpfung versehen ist. Durch die unterschiedlichen Wandstärken im Bereich einzelner Löcher oder auch Lochreihen lässt sich ein besonders breites Spektrum von Frequenzen dämpfen. Die unterschiedlichen Wandstärken können wie oben beschrieben durch nachträgliche Bearbeitung oder schon im Herstellprozess des Lochblechs erzielt werden. Vorzugsweise wird der Schalldämpfer hier Kombinationen von Lochreihen mit jeweils unterschiedlichen Wandstärken des Lochblechs bei den Lochreihen aufweisen.Another embodiment of the invention is characterized in that the silencer with a combination of rows of holes with different wall thicknesses of the Perforated sheet is provided for broadband sound absorption. Because of the different Wall thicknesses in the area of individual holes or rows of holes can be a particular one attenuate a wide range of frequencies. The different wall thicknesses can as described above through subsequent processing or already in the manufacturing process of the perforated plate can be achieved. The muffler is preferably a combination here of rows of holes with different wall thicknesses of the perforated plate have the rows of holes.

Eine alternative Lösung ist darin zu sehen, einen Schalldämpfer insbesondere für eine Brennkraftmaschine mit Turbolader, wobei wenigstens ein schallführendes Element wenigstens eine Kammer enthält, die durch ein Lochblech vom korrespondierenden Strömungskanal getrennt ist und dadurch nach dem Prinzip eines Helmholtz-Resonators aufgebaut ist, vorzusehen. Erfindungsgemäß weist das Lochblech im direkten Bereich der darin angeordneten Löcher bei jedem Loch eine kegelförmige Senkung auf, wobei der Winkel zwischen den Senkflächen zwischen 60 und 150° beträgt. Weiterhin erfolgen die Senkungen aus Richtung der Resonatorkammer. Hierbei ist das Resonatorrohr aus Metall und die Senkungen werden mechanisch von außen eingebracht.An alternative solution is to see a silencer especially for one Internal combustion engine with turbocharger, at least one sound-conducting element at least contains a chamber through a perforated plate from the corresponding flow channel is separated and thus constructed according to the principle of a Helmholtz resonator is to provide. According to the perforated plate in the direct area of the holes arranged therein have a conical countersink for each hole, the Angle between the countersinks is between 60 and 150 °. Furthermore, the Decreases from the direction of the resonator chamber. The resonator tube is made of metal and the depressions are mechanically introduced from the outside.

In einer weiteren Ausgestaltung dieses Schalldämpfers beträgt die Wandstärke des Lochblechs in den nicht angesenkten Bereichen zwischen 0,5 und 5 mm und der Lochdurchmesser zwischen 1 und 20 mm. In a further embodiment of this silencer, the wall thickness is Perforated sheet in the non-countersunk areas between 0.5 and 5 mm and the hole diameter between 1 and 20 mm.

Es ist vorteilhaft, den radialen Abstand zwischen Lochblech und einer äußeren Begrenzungswand zwischen 1 und 40 mm betragen zu lassen.It is advantageous to determine the radial distance between the perforated plate and an outer boundary wall to be between 1 and 40 mm.

Ebenso vorteilhaft ist es, bei diesem Schalldämpfer das Verhältnis zwischen Kammervolumen und Summe der Lochblechen zwischen 4 und 40 cm3 pro cm2 betragen zu lassen.It is also advantageous for this silencer to have the ratio between the chamber volume and the sum of the perforated sheets between 4 and 40 cm 3 per cm 2 .

Die Veränderung der Wandstärke des Lochblechs ergibt eine Änderung der wirksamen Resonatorhalslänge. Allerdings hat sich gezeigt, dass eine zu geringe Wandstärkenänderung nur eine sehr geringe Veränderung der zu dämpfenden Frequenz ergibt. Bei den bisher bekannten Lösungen durfte die Wandstärke nicht zu weit herabgesetzt werden, um das Lochblech nicht zu stark zu schwächen und keinen Ausfall vorzuprogrammieren. Durch die nur partiell vorgenommene Verringerung der Wandstärke durch eine Senkung im Lochbereich wird dieser Nachteil vermieden, und es lassen sich so sehr kleine Resonatorhalslängen realisieren und dementsprechend der zu dämpfende Frequenzbereich in Richtung der höheren Frequenzen verschieben.The change in the wall thickness of the perforated plate results in a change in the effective Resonatorhalslänge. However, it has been shown that the wall thickness change is too small results in only a very slight change in the frequency to be damped. Both previously known solutions, the wall thickness could not be reduced too far, in order not to weaken the perforated plate too much and not to pre-program a failure. By only partially reducing the wall thickness by lowering it This disadvantage is avoided in the hole area, and very small resonator neck lengths can be achieved in this way realize and accordingly the frequency range to be damped in Shift towards the higher frequencies.

Der erfindungsgemäße Schalldämpfer wird vorteilhaft in einer Brennkraftmaschine mit wenigstens einem Abgasturbolader eingesetzt, wobei er dort ansaugseitig und/oder abgasseitig eingesetzt werden kann.The silencer according to the invention is advantageously used in an internal combustion engine used at least one exhaust gas turbocharger, where it is on the intake side and / or exhaust side can be used.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung 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 beyond from the claims also from the description and the drawing, wherein the individual characteristics individually or in groups in the form of sub-combinations realized in the embodiment of the invention and in other fields be and can represent advantageous and protectable versions for which protection is claimed here.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigt

Figur 1
Schematische Ansicht eines erfindungsgemäßen Schalldämpfers in einer besonderen Ausführungsform
Figur 2
Darstellung der Korrelation zwischen Senkwinkel und Resonatorhalslänge
Figur 3
Darstellung des Einflusses des Senkwinkels auf das Dämpfungsmaß
Further details of the invention are described in the drawing using schematic exemplary embodiments. Here shows
Figure 1
Schematic view of a silencer according to the invention in a special embodiment
Figure 2
Representation of the correlation between countersink angle and resonator neck length
Figure 3
Representation of the influence of the lowering angle on the damping dimension

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die Figur 1 zeigt eine schematische Ansicht einer Ausführungsform der Erfindung. Dargestellt wird ein Schalldämpfer 10, bestehend aus einem Lochblech 11 und einer Resonatorkammerwand 14. Das Lochblech 11 weist eine im wesentlichen zylindrische Form auf und trennt den im Innern des Lochblechs 11 verlaufenden Strömungskanal von zwei Resonatorkammern 13a, 13b. Diese werden durch die, das Lochblech 11 im radialen Abstand umgebende, Resonatorkammerwand 14 gebildet, wobei die Kammern 13a, 13b durch eine Trennwand 15 voneinander getrennt werden. Im Bereich der Resonatorkammern 13a, 13b weist das Lochblech 11 Aussparungen 12 auf, welche zur Erzeugung des Helmholtz-Effekts dienen und über den gesamten Umfang verteilt sind. Die Ausparungen 12 sind im Lochblech 11 in Richtung der Resonatorkammerwand 14 angesenkt wobei die beiden Lochreihen jeweils einen unterschiedlichen Senkwinkel aufweisen. Hierdurch ergibt sich eine breitbandige Dämpfung des emittierten Schalls, da durch die unterschiedlichen Senkwinkel unterschiedliche Resonatorhalslängen erzielt werden. In der dargestellten Figur ist das Lochblech 11 aus Metall mit Möglichkeiten an den jeweiligen Enden mit weiterführenden Leitungsteilen oder einem Abgasturbolader verbunden zu werden. Die Resonatorkammerwand besteht aus einem Kunststoff, wie z.B. Polyamid 6.6 (PA 6.6) und wird mit dem Lochblech dichtend über Verklebung oder sonstige im Stand der Technik bekannten Verbindungsverfahren verbunden. Die Senkungen der Ausparungen 12 werden vor der Verbindung von Lochblech 11 und Resonatorkammerwand 14 mechanisch, mit definierten Senkwinkeln, eingebracht. Durch die Senkungen weicht die wirksame Resonatorhalslänge von der ursprünglichen Resonatorhalslänge, nämlich der Lochblechwandstärke s, ab.FIG. 1 shows a schematic view of an embodiment of the invention. shown becomes a silencer 10, consisting of a perforated plate 11 and a resonator chamber wall 14. The perforated plate 11 has a substantially cylindrical shape and separates the flow channel running inside the perforated plate 11 from two Resonator chambers 13a, 13b. These are by the perforated plate 11 in the radial Spacing surrounding resonator chamber wall 14 is formed, the chambers 13a, 13b be separated from each other by a partition 15. In the area of the resonator chambers 13a, 13b, perforated plate 11 has cutouts 12 which are used to produce the Helmholtz effect serve and are distributed over the entire scope. The recesses 12 are countersunk in the perforated plate 11 in the direction of the resonator chamber wall 14 the two rows of holes each have a different countersink angle. This gives there is broadband attenuation of the emitted sound because of the different Different resonator neck lengths can be achieved. In the illustrated Figure is the perforated plate 11 made of metal with options at the respective ends to be connected to further pipeline parts or an exhaust gas turbocharger. The resonator chamber wall consists of a plastic, such as Polyamide 6.6 (PA 6.6) and is sealed with the perforated sheet via gluing or other in the prior art known connection method connected. The cutouts in the recesses 12 are mechanically connected between the perforated plate 11 and the resonator chamber wall 14, with defined countersink angles. Due to the subsidence, the effective one gives way Resonator neck length from the original resonator neck length, namely the perforated plate wall thickness s, down.

Die Figur 2 zeigt den Zusammenhang zwischen Senkwinkel α und Resonatorhalslänge s. Der Figur 1 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. In der Figur 2 sind 3 Schnitte des Lochblechs 11 im Bereich der Aussparungen 12 mit jeweils unterschiedlichen Senkungen und unterschiedlichen Senkwinkeln αi zu erkennen. Der untere Ausschnitt gemäß Figur 2c zeigt ein Lochblech 11 im Bereich einer Aussparung 12, welches keine Senkung aufweist, was dem Stand der Technik entspricht, und wobei die wirksame Resonatorhalslänge si der Wandstärke s des Lochblechs 11 entspricht. Ein Weg die zu dämpfende Frequenz anzuheben, ist die wirksame Resonatorhalslänge si zu verringern. Der mittlere Ausschnitt der Figur 2b zeigt widerum ein Lochblech 11 im Bereich einer Aussparung 12 mit einer Senkung unter dem Senkwinkel α2. Hieraus resultiert eine Veringerung der Resonatorhalslänge zur wirksamen Resonatorhalslänge S2. Im oberen Ausschnitt gemäß Figur 2a ist der Senkwinkel αi gegenüber dem mittleren Ausschnitt noch zu einem Senkwinkel α1 vergrößert worden. Aufgrund des vergrößerten Senkwinkels α1 ergibt sich wiederum eine veringerte Resonatorhalslänge s1. Es ist also zu erkennen, dass eine Senkung im Bereich der Aussparungen 12 des Lochblechs 11 zu einer Reduzierung der wirksamen Resonatorhalslänge si führt, wobei eine Vergrößerung des Senkwinkels αi zu weiterer Reduzierung der wirksamen Resonatorhalslänge Si führt. So läßt sich also eine Resonatorhalslängenreduzierung bei im wesentlichen gleichbleibender Wandstärke s des Lochblechs 11 ohne nennenswerte Schwächung desselben erzielen.FIG. 2 shows the relationship between countersink angle α and resonator neck length s. Components corresponding to FIG. 1 are provided with the same reference symbols. FIG. 2 shows 3 sections of the perforated plate 11 in the area of the cutouts 12, each with different countersinks and different countersink angles α i . The lower section according to FIG. 2c shows a perforated plate 11 in the region of a recess 12, which has no countersink, which corresponds to the prior art, and the effective resonator neck length s i corresponds to the wall thickness s of the perforated plate 11. One way to increase the frequency to be damped is to reduce the effective resonator neck length s i . The middle section of FIG. 2b again shows a perforated plate 11 in the region of a recess 12 with a depression at the depression angle α 2 . This results in a reduction in the resonator neck length to the effective resonator neck length S 2 . In the upper section according to FIG. 2a, the countersink angle α i has been increased to a countersink angle α 1 compared to the middle section. Due to the increased angle of depression α 1 , there is again a reduced resonator neck length s 1 . It can thus be seen that a reduction in the area of the cutouts 12 in the perforated plate 11 leads to a reduction in the effective resonator neck length s i , an increase in the depression angle α i leading to a further reduction in the effective resonator neck length S i . Thus, a reduction in the length of the resonator neck while the wall thickness s of the perforated plate 11 remains essentially the same without any significant weakening of the same.

Die Auswirkungen der Reduzierung der wirksamen Resonatorhalslänge si auf die zu dämpfende Frequenz F ist in Figur 3 dargestellt. Deutlich ist die grundsätzliche Wirkung von Helmholtz-Resonatoren mit einem Dämpfungsmaß über 20 dB gegenüber einer Leitung mit gleichem Durchmesser ohne Schalldämpfer gemäß Verlauf X zu erkennen. Weiterhin zeigt sich eine Verlagerung der gedämpften Frequenzen bei unterschiedlichen bzw. keinen Senkungen im Bereich der Aussparungen 12 des Lochblechs 11. Der getestete Schalldämpfer weist eine vollumfängliche Lochreihe mit einer ebenso vollumfänglichen, konzentrischen Resonatorkammer auf. Bei einer Ansenkung der Ausparungen gegenüber den nicht angesenkten Aussparungen verschiebt sich die gedämpfte Frequenz in Richtung der höheren Frequenzen. Vergrößert man nun den Senkwinkel αi, so ergibt sich eine weitere Verschiebung der Dämpfungsfrequenz in Richtung der höheren Frequenzen. Dieses bestätigt die zu den Figuren 2 getroffene Aussage einer Veringerung der wirksamen Resonatorhalslänge si bei Vergrößerung des Senkwinkels αi. Über die in Testreihen gewonnenen Ergebnisse und durch die Anwendung mehrerer Lochreihen mit unterschiedlichen Senkwinkeln läßt sich so ein exakt auf das zu dämpfende Frequenzspektrum abgestimmter Breitbandresonator mit geringem Platzbedarf und Herstellungskosten realisieren.The effects of the reduction of the effective resonator neck length s i on the frequency F to be damped are shown in FIG. 3. The basic effect of Helmholtz resonators with a damping factor of over 20 dB compared to a line with the same diameter without a silencer according to the X curve can be clearly seen. Furthermore, there is a shift in the attenuated frequencies with different or no reductions in the area of the cutouts 12 of the perforated plate 11. The muffler tested has a full row of holes with an equally full, concentric resonator chamber. If the recesses are reduced compared to the recesses that are not recessed, the damped frequency shifts in the direction of the higher frequencies. If the angle of depression α i is increased , there is a further shift in the damping frequency in the direction of the higher frequencies. This confirms the statement made in relation to FIGS. 2 that the effective resonator neck length s i is reduced when the angle of depression α i is increased . Using the results obtained in test series and the use of several rows of holes with different angles of incidence, a broadband resonator that is precisely tailored to the frequency spectrum to be damped can be realized with a small footprint and manufacturing costs.

Claims (16)

Schalldämpfer, insbesondere einer Brennkraftmaschine, vorzugsweise einer aufgeladenen Brennkraftmaschine, wobei wenigstens ein schallführendes Element wenigstens eine Resonatorkammer enthält, die durch ein Lochblech vom korrespondierenden Strömungskanal getrennt ist und dadurch nach dem Prinzip eines Helmholtz-Resonators aufgebaut ist, dadurch gekennzeichnet, dass das Lochblech im direkten Bereich der darin angeordneten Löcher an wenigstens einem Loch eine veränderte Wandstärke aufweist.Silencer, in particular an internal combustion engine, preferably a supercharged internal combustion engine, wherein at least one sound-conducting element contains at least one resonator chamber, which is separated from the corresponding flow channel by a perforated plate and is therefore constructed according to the principle of a Helmholtz resonator, characterized in that the perforated plate is directly Area of the holes arranged therein has a changed wall thickness on at least one hole. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass die veränderte Wandstärke durch eine kegelförmige Senkung mit einem definierten Winkel zwischen den Senkflächen realisiert istSilencer according to claim 1, characterized in that the changed wall thickness is realized by a conical lowering with a defined angle between the lower surfaces Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass die veränderte Wandstärke durch eine wenigstens eine Stufe umfassende stufenweise Verringerung der Wandstärke realisiert ist.Silencer according to claim 1, characterized in that the changed wall thickness is realized by a stepwise reduction of the wall thickness comprising at least one step. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass die veränderte Wandstärke durch eine, im wesentlichen halbkugelförmige Senkung realisiert ist.Silencer according to claim 1, characterized in that the changed wall thickness is realized by an essentially hemispherical depression. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass die veränderte Wandstärke durch eine gezielte Wandmaterialanhäufung in diesem Bereich realisiert ist.Silencer according to claim 1, characterized in that the changed wall thickness is realized by a targeted accumulation of wall material in this area. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass die veränderte Wandstärke durch eine lochkongruente Verbindung mit wenigstens einem weiteren Lochblech realisiert ist.Silencer according to claim 1, characterized in that the changed wall thickness is realized by a hole-congruent connection with at least one further perforated plate. Schalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schalldämpfer in einer Strömungsleitung einer Brennkraftmaschine zwischen einem Abgasturbolader und einer Ladeluftkühlung angeordnet ist.Silencer according to one of the preceding claims, characterized in that the silencer is arranged in a flow line of an internal combustion engine between an exhaust gas turbocharger and an intercooler. Schalldämpfer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Schalldämpfer in einem schallführendem Element im Innern eines Abgasturboladers einer Brennkraftmaschine angeordnet ist. Silencer according to one of claims 1 to 6, characterized in that the silencer is arranged in a sound-conducting element in the interior of an exhaust gas turbocharger of an internal combustion engine. Schalldämpfer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Schalldämpfer in einem schallführenden Element in einer abgasseitigen Leitung der Brennkraftmaschine angeordnet ist.Silencer according to one of claims 1 to 6, characterized in that the silencer is arranged in a sound-conducting element in an exhaust-side line of the internal combustion engine. Schalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schalldämpfer mit einer Kombination von Lochreihen mit unterschiedlichen Wandstärken des Lochblechs zur breitbandigeren Schalldämpfung versehen ist.Silencer according to one of the preceding claims, characterized in that the silencer is provided with a combination of rows of holes with different wall thicknesses of the perforated plate for broadband sound attenuation. Schalldämpfer, insbesondere für eine Brennkraftmaschine mit Turbolader, wobei wenigstens ein schallführendes Element wenigstens eine Kammer enthält, die durch ein Lochblech vom korrespondierenden Strömungskanal getrennt ist und dadurch nach dem Prinzip eines Helmholtz-Resonators aufgebaut ist, dadurch gekennzeichnet, dass das Lochblech im direkten Bereich der darin angeordneten Löcher bei jedem Loch eine kegelförmige Senkung enthält und wobei der Winkel zwischen den Senkflächen zwischen 60° und 150° beträgt.Silencer, in particular for an internal combustion engine with a turbocharger, wherein at least one sound-conducting element contains at least one chamber which is separated from the corresponding flow channel by a perforated plate and is therefore constructed according to the principle of a Helmholtz resonator, characterized in that the perforated plate is in the direct area of the holes arranged therein contains a conical countersink for each hole and the angle between the countersunk areas is between 60 ° and 150 °. Schalldämpfer nach Anspruch 11, dadurch gekennzeichnet, dass die Wandstärke des Lochblechs in den Bereichen, die nicht angesenkt sind, zwischen 0,5 und 5 mm beträgt und der Lochdurchmesser zwischen 1 und 20 mm beträgt.Silencer according to claim 11, characterized in that the wall thickness of the perforated plate in the areas that are not countersunk is between 0.5 and 5 mm and the hole diameter is between 1 and 20 mm. Schalldämpfer nach einem der Ansprüche 11 oder 12, dadurch gekennzeichnet, dass der radiale Abstand zwischen Lochblech und einer äußeren Begrenzungswand zwischen 1 und 40 mm beträgt.Silencer according to one of claims 11 or 12, characterized in that the radial distance between the perforated plate and an outer boundary wall is between 1 and 40 mm. Schalldämpfer nach einem oder mehreren der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass das Verhältnis zwischen Kammervolumen und Summe der Lochflächen zwischen 4 und 40 cm3/cm2 beträgt.Silencer according to one or more of claims 11 to 13, characterized in that the ratio between the chamber volume and the sum of the perforated areas is between 4 and 40 cm 3 / cm 2 . Schalldämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Veränderung der Lochblechwandstärke eine Änderung der wirksamen Resonatorhalslänge ergibt.Silencer according to one of the preceding claims, characterized in that a change in the perforated plate wall thickness results in a change in the effective resonator neck length. Brennkraftmaschine mit wenigstens einem Abgasturbolader, dadurch gekennzeichnet, dass ein Schalldämpfer nach einem der vorhergehenden Ansprüche vorhanden ist.Internal combustion engine with at least one exhaust gas turbocharger, characterized in that a silencer according to one of the preceding claims is present.
EP03103301A 2002-09-21 2003-09-05 Silencer with resonator Expired - Lifetime EP1400662B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10243884 2002-09-21
DE10243884A DE10243884A1 (en) 2002-09-21 2002-09-21 Resonatorschalldämpfer

Publications (2)

Publication Number Publication Date
EP1400662A1 true EP1400662A1 (en) 2004-03-24
EP1400662B1 EP1400662B1 (en) 2007-08-08

Family

ID=31896264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03103301A Expired - Lifetime EP1400662B1 (en) 2002-09-21 2003-09-05 Silencer with resonator

Country Status (3)

Country Link
EP (1) EP1400662B1 (en)
AT (1) ATE369485T1 (en)
DE (2) DE10243884A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010020064A1 (en) 2010-05-11 2011-11-17 Bayerische Motoren Werke Aktiengesellschaft Silencer arrangement for reducing acoustic radiations in gas ducts in internal combustion engine of motor vehicle, has cover plate arranged between flow channel and resonator chamber, where arrangement forms coupling
EP2534343A2 (en) * 2010-02-11 2012-12-19 Faurecia Emissions Control Technologies, USA, LLC Plastic muffler with helmholtz chamber
EP2757235A1 (en) 2013-01-16 2014-07-23 Henn GmbH & Co.KG Sound muffler and method for producing the same
WO2016061604A1 (en) 2014-10-21 2016-04-28 Henn Gmbh & Co Kg. Vehicle sound damper for a charge air line of an internal combustion engine
CN107407484A (en) * 2015-07-08 2017-11-28 三菱日立电力系统株式会社 Burner and gas turbine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019002157B4 (en) * 2019-03-26 2023-03-02 Stefanie Gernert WALL FOR LOW-FREQUENCY AND WIDE-FREQUENCY BANDINGS, MASSIVE ACOUSTIC ATTENUATION OF PLANIAL INCIDENT SOUND
US11808187B2 (en) 2021-03-01 2023-11-07 Caterpillar Inc. Noise attenuation components

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164266A (en) * 1976-08-19 1979-08-14 Lars Collin Exhaust gas muffler
FR2540912A2 (en) * 1982-06-02 1984-08-17 Uzan Daniel Passive acoustic absorber device also absorbing low frequencies
FR2743848A1 (en) * 1996-01-24 1997-07-25 Peugeot Adjustable silencer for air intake of vehicular combustion engine
FR2751375A1 (en) * 1996-07-20 1998-01-23 Heinrich Gillet Gmbh Co Kg DEVICE FOR DELETING THE FORMATION OF HARMONIC SOUNDS IN PERFORATED TUBES
WO1998059166A1 (en) * 1997-06-20 1998-12-30 Filterwerk Mann+Hummel Gmbh Induction system, especially for use as an induction port of an internal combustion engine
US5930371A (en) * 1997-01-07 1999-07-27 Nelson Industries, Inc. Tunable acoustic system
DE10102040A1 (en) * 2001-01-18 2002-07-25 Mahle Filtersysteme Gmbh Silencer, for a motor exhaust or turbo charger air intake, has a hollow body at the component to be suppressed containing a number of parallel Helmholtz resonators

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376994A1 (en) * 1977-01-11 1978-08-04 Snecma IMPROVEMENTS TO RESONANT CAVITY DEVICES FOR THE REDUCTION OF NOISE IN A DUCT IN THE PRESENCE OF A GAS FLOW
DE19818873C2 (en) * 1998-04-28 2001-07-05 Man B & W Diesel Ag Reciprocating internal combustion engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164266A (en) * 1976-08-19 1979-08-14 Lars Collin Exhaust gas muffler
FR2540912A2 (en) * 1982-06-02 1984-08-17 Uzan Daniel Passive acoustic absorber device also absorbing low frequencies
FR2743848A1 (en) * 1996-01-24 1997-07-25 Peugeot Adjustable silencer for air intake of vehicular combustion engine
FR2751375A1 (en) * 1996-07-20 1998-01-23 Heinrich Gillet Gmbh Co Kg DEVICE FOR DELETING THE FORMATION OF HARMONIC SOUNDS IN PERFORATED TUBES
US5930371A (en) * 1997-01-07 1999-07-27 Nelson Industries, Inc. Tunable acoustic system
WO1998059166A1 (en) * 1997-06-20 1998-12-30 Filterwerk Mann+Hummel Gmbh Induction system, especially for use as an induction port of an internal combustion engine
DE10102040A1 (en) * 2001-01-18 2002-07-25 Mahle Filtersysteme Gmbh Silencer, for a motor exhaust or turbo charger air intake, has a hollow body at the component to be suppressed containing a number of parallel Helmholtz resonators

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2534343A2 (en) * 2010-02-11 2012-12-19 Faurecia Emissions Control Technologies, USA, LLC Plastic muffler with helmholtz chamber
EP2534343A4 (en) * 2010-02-11 2015-04-22 Faurecia Emissions Control Technologies Usa Llc Plastic muffler with helmholtz chamber
DE102010020064A1 (en) 2010-05-11 2011-11-17 Bayerische Motoren Werke Aktiengesellschaft Silencer arrangement for reducing acoustic radiations in gas ducts in internal combustion engine of motor vehicle, has cover plate arranged between flow channel and resonator chamber, where arrangement forms coupling
DE102010020064B4 (en) 2010-05-11 2019-10-02 Bayerische Motoren Werke Aktiengesellschaft Silencer arrangement for a particular supercharged motor vehicle internal combustion engine
EP2757235A1 (en) 2013-01-16 2014-07-23 Henn GmbH & Co.KG Sound muffler and method for producing the same
WO2016061604A1 (en) 2014-10-21 2016-04-28 Henn Gmbh & Co Kg. Vehicle sound damper for a charge air line of an internal combustion engine
CN107407484A (en) * 2015-07-08 2017-11-28 三菱日立电力系统株式会社 Burner and gas turbine
CN107407484B (en) * 2015-07-08 2019-12-03 三菱日立电力系统株式会社 Burner and gas turbine
US10712004B2 (en) 2015-07-08 2020-07-14 Mitsubishi Hitachi Power Systems, Ltd. Combustor including an acoustic device mounted on a combustion liner for damping combustion oscillation of a predetermined frequency and gas turbine

Also Published As

Publication number Publication date
ATE369485T1 (en) 2007-08-15
EP1400662B1 (en) 2007-08-08
DE10243884A1 (en) 2004-04-01
DE50307856D1 (en) 2007-09-20

Similar Documents

Publication Publication Date Title
DE2822971C2 (en) Exhaust device for internal combustion engines
EP1715189B1 (en) Noise attenuator designed and meant for a compressor
EP3030779B1 (en) Silencer
EP2394033B1 (en) Muffler with helical inserts
WO2010040837A2 (en) Sound absorber for an auxiliary engine of an aircraft
DE102008001390A1 (en) silencer
DE19504223A1 (en) Intake silencer for internal combustion engine
DE19956172C5 (en) Double chamber damper
EP1510667A2 (en) Silencer
EP1715188A1 (en) Noise attenuator designed and meant for a compressor
DE10121582C2 (en) Air supply unit for vehicles with a compressor and a silencer
DE2908506C2 (en) Silencers for internal combustion engines
EP1051562B1 (en) Silencer with a shunt resonator
DE202013011555U1 (en) Sound quality controller of the compressor air inlet side of the exhaust gas turbocharger
DE602004001142T2 (en) silencer
EP1400662B1 (en) Silencer with resonator
EP1306239B1 (en) Air supply unit for a vehicle
DE102005004079B4 (en) Sound damping device for a heater
DE10219964B4 (en) RF attenuator
DE19638304A1 (en) Gas-pipe silencer with baffles in chamber
DE102005054397B3 (en) Pipe sound absorber for use in ventilation duct, has segments with different intervals to each other for separating space between inner channel and outer wall into chambers in axial direction, where channel has radial intervals from wall
DE10103739B4 (en) silencer
EP0705961B1 (en) Exhaust silencer
DE102012207198A1 (en) Air suction pipe arrangement for supplying fresh air to internal combustion engine of motor car, has sound emission influencing device that is arranged in portion of tube assembly relative to the intended air flow direction
DE1200007B (en) Sound absorber with a backdrop for attenuating noise emitted from a wall opening or the like

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040510

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50307856

Country of ref document: DE

Date of ref document: 20070920

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20071115

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071108

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071119

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
BERE Be: lapsed

Owner name: MANN+HUMMEL G.M.B.H.

Effective date: 20070930

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070930

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071109

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080108

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071108

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

26N No opposition filed

Effective date: 20080509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080209

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070808

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130919

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130919

Year of fee payment: 11

Ref country code: FR

Payment date: 20130919

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20130923

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50307856

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140905

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50307856

Country of ref document: DE

Effective date: 20150401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140905

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140930

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140905