EP2633162A1 - Exhaust gas muffler arrangement - Google Patents

Exhaust gas muffler arrangement

Info

Publication number
EP2633162A1
EP2633162A1 EP11776425.8A EP11776425A EP2633162A1 EP 2633162 A1 EP2633162 A1 EP 2633162A1 EP 11776425 A EP11776425 A EP 11776425A EP 2633162 A1 EP2633162 A1 EP 2633162A1
Authority
EP
European Patent Office
Prior art keywords
exhaust
muffler
housing
wall
silencer
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
EP11776425.8A
Other languages
German (de)
French (fr)
Other versions
EP2633162B1 (en
Inventor
Kurt Klammler
Thomas Obenaus
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.)
AVL List GmbH
Original Assignee
AVL List 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 AVL List GmbH filed Critical AVL List GmbH
Publication of EP2633162A1 publication Critical patent/EP2633162A1/en
Application granted granted Critical
Publication of EP2633162B1 publication Critical patent/EP2633162B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/141—Double-walled exhaust pipes 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • 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
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/02—Resonance and interference
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/04—Catalytic converters
    • 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

Definitions

  • the invention relates to an exhaust silencer arrangement for an internal combustion engine, in particular of a power generator, with a pre-silencer and a rear silencer.
  • DE 19 834 822 AI describes an exhaust muffler on an internal combustion engine in a motor chain saw, which consists of a housing which is composed of two housing shells.
  • the one housing shell has an exhaust gas inlet, the other housing shell an exhaust gas outlet.
  • an inner wall, and arranged between the exhaust inlet and exhaust outlet catalyst element are provided in the interior of the muffler housing.
  • a combined exhaust silencer and catalyst unit is further known from EP 0 356 607 AI.
  • the object of the invention is to achieve the highest possible acoustic and thermal damping in an exhaust system for an internal combustion engine in the smallest possible space and in a simple manufacturing manner.
  • the two chambers may be sandwiched one above the other or side by side. As a result, an extremely compact design can be made possible.
  • a power generator such as a so-called range extender for an electric vehicle
  • the partition has at least one thermal insulation, wherein preferably the partition wall has a sandwich-type structure with at least three layers. - - has, wherein an insulating mat is particularly preferably arranged between two dividing plates.
  • the flow connection between the two chambers may be formed by a sliding seat normal to the partition exhibiting connecting pipe.
  • the housing wall has a thermal insulation, preferably a sandwich-like structure with at least three layers, wherein particularly preferably between a metallic inner wall and a preferably metallic outer wall an existing example of an insulating mat insulating layer is arranged.
  • the outer wall of the housing wall may consist of an at least single-layered, preferably dome-embossed, Edelstallfolie.
  • a particularly preferred embodiment variant of the invention provides that at least one exhaust gas aftertreatment device formed, preferably at least one catalyst unit, is arranged in the housing, wherein the housing preferably has at least one closable expansion opening for installing and removing the exhaust gas aftertreatment device.
  • the integration of the exhaust aftertreatment device in the housing allows a particularly compact design of the exhaust system.
  • the insulation of the housing wall also has an advantageous effect on the response of the exhaust aftertreatment device.
  • the housing is formed integrally with at least one preferably flexible exhaust pipe and / or an exhaust manifold, wherein to minimize the heat radiation may be provided that the exhaust pipe and / or the exhaust manifold, preferably by a sandwich Structure formed insulation having preferably arranged between two metallic layers insulating layer.
  • a high sound attenuation is achieved if the front silencer is designed as a reflection silencer and the rear silencer as a combined absorption / resonator silencer with at least two, preferably at least three, particularly preferably four resonator chambers.
  • the housing has an upper shell and a lower shell, the upper shell and the lower shell preferably being in the region of a parting plane.
  • - - Are welded together rallel to the partition wall. It is particularly advantageous if the inner wall of the upper and / or lower shell housing wall of a half-shell, preferably made of sheet metal.
  • FIG. 1 shows a silencer arrangement according to the invention in a first
  • FIG. 2 shows the muffler assembly in a plan view.
  • Fig. 3 shows a silencer arrangement according to the invention in a second
  • the figures each show an exhaust muffler arrangement 1 with a housing 2, in which a first chamber 3 and a second chamber 4 is arranged.
  • the housing 2 consists of an upper shell 2a and a lower shell 2b, which are welded together in the region of a separation plane ⁇ parallel to the partition wall 9.
  • a pre-silencer VSD and in the second chamber 4 a rear silencer NSD is arranged in the same housing 2.
  • an exhaust gas aftertreatment device 6 formed by a catalyst unit 5, 5a, 5b may be arranged.
  • an exhaust manifold 7, an exhaust gas pipe or flexible exhaust pipes may be formed in one piece with the housing 2.
  • the housing wall 8 of the housing 2 has a sandwich-like structure with a plurality of layers, wherein an insulating mat 8c is arranged between an inner wall 8a formed by a half-shell of sheet metal and an outer wall 8b formed by, for example, a dome-embossed stainless steel foil.
  • the first chamber 3 and second chamber 4 are separated by a partition wall 9.
  • the partition wall 9 also has a sandwich-like structure - -, wherein between two partitions 9a, 9b, an insulating mat 9c is arranged, as shown in detail in Fig. 6.
  • the exhaust aftertreatment device 6 is arranged horizontally, i. the flow axis 6 a of the exhaust aftertreatment device 6 is formed substantially parallel to the partition wall 9.
  • the aftertreatment device 6 is lying, that is, with a substantially horizontal flow axis 6a.
  • the catalyst units 5 a, 5 b of the exhaust gas aftertreatment device 6 are positioned vertically, the flow axis 6 a of the exhaust gas aftertreatment device 6 is arranged substantially normal to the dividing wall 9, the catalyst units 5 a, 5 b via Abdichtringe 13 are mounted in the partition 9.
  • a mounting opening 15 which can be closed by means of a cover 14, via which the catalyst units 5a, 5b can be removed and installed.
  • the pre-muffler VSD shown in FIG. 4 in the chamber 3 is designed as a so-called reflection muffler 10 and has a plurality of reflection chambers 10a, 10b, which are bounded by normal to the partition wall 9 arranged reflective plates I Ia, I Ib, 11c.
  • the reflection muffler 10 has an input pipe 12a, a connection pipe 12b and an exhaust pipe 12c.
  • the rear muffler NSD shown in FIG. 5 is embodied in the exemplary embodiment as a combined absorption / resonator muffler with low-frequency resonator chambers R 1, R 2, R 3, R 4, as well as high-frequency absorption chambers.
  • Pre-muffler VSD and rear muffler NSD are fluidly connected to each other via a connecting pipe 16 penetrating the partition 9.
  • the connecting tube 16 is mounted in a sliding seat 17 normal to the partition wall 9, as shown in Fig. 6 can be seen.
  • the exhaust gas passes from the internal combustion engine according to arrows shown in FIGS. 3 to 5 into the housing 2 and is guided via the catalyst units 5 a, 5 b into the pre-silencer VSD arranged in the first chamber 3.
  • the exhaust gas flows via the connecting pipe 16 into the rear silencer NSD arranged in the second chamber 4.
  • the exhaust gas leaves the housing 2 via the outlet opening 19.
  • the exhaust muffler assembly 1 described allow a particularly compact design and the integration of the exhaust muffler, consisting of pre-muffler VSD and rear silencer NSD in the vehicle periphery.
  • the exhaust muffler assembly 1 allows a particularly simple production: Between the pre-muffler VSD and the rear muffler NSD an insulating mat 9c is inserted with a wall thickness between 10 mm and 30 mm and a heat resistance up to about 1000 ° C, which the heat transfer between the front silencer VSD and rear silencer NSD prevented. Thereafter, the pre-muffler VSD and rear muffler NSD are connected and welded together via the separating plates 9a, 9b. This results in a compact exhaust muffler arrangement 1, which consists primarily of pre-muffler VSD and rear muffler NSD. The next step is the application of an insulating layer 8c to the inner wall 8a of the housing 2.
  • the permanent attachment then takes place by means of a formed by about a single or multi-layer dome embossed stainless steel foil outer wall 8b, which is firmly welded to the unit consisting of pre-silencer VSD and rear silencer NSD.
  • the embossing depth of the dome-embossed stainless steel foil can be between 0.1 mm and 0.9 mm.
  • the design of the interior of the pre-silencer VSD and the rear silencer NSD can be adapted differently.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention relates to an exhaust gas muffler arrangement (1) for an internal combustion engine, in particular a generator, comprising a pre-muffler (VSD) and a post-muffler (NSD). In order to achieve a compact design with a high sound-damping capability, the pre-muffler (VSD) and the post-muffler (NSD) are arranged in a common housing (2), said pre-muffler (VSD) lying in a first chamber (3) and the post-muffler (NSD) lying in a second chamber (4) of the housing (2). The two chambers (3, 4) are fluidically connected to each other by means of at least one fluid connection in a partition (9).

Description

- -  - -
56252 56252
Abgasschalldämpferanordnung Exhaust muffler assembly
Die Erfindung betrifft eine Abgasschalldämpferanordnung für eine Brennkraftmaschine, insbesondere eines Stromerzeugungsaggregates, mit einem Vorschalldämpfer und einem Nachschalldämpfer. The invention relates to an exhaust silencer arrangement for an internal combustion engine, in particular of a power generator, with a pre-silencer and a rear silencer.
Abgassysteme mit thermischen Isolierschichten sind aus den Veröffentlichungen CN 2 596 032 Y, DE 10 248 781 B3 und GB 2 347 970 AI bekannt. Exhaust systems with thermal insulation layers are known from the publications CN 2 596 032 Y, DE 10 248 781 B3 and GB 2 347 970 AI.
Die DE 19 834 822 AI beschreibt einen Abgasschalldämpfer an einem Verbrennungsmotor in einer Motorkettensäge, welcher aus einem Gehäuse besteht, das aus zwei Gehäuseschalen zusammengesetzt ist. Die eine Gehäuseschale weist einen Abgaseinlass, die andere Gehäuseschale einen Abgasauslass auf. Im Innenraum des Schalldämpfergehäuses sind eine Innenwand, sowie ein zwischen Abgaseinlass und Abgasauslass angeordnetes Katalysatorelement vorgesehen. DE 19 834 822 AI describes an exhaust muffler on an internal combustion engine in a motor chain saw, which consists of a housing which is composed of two housing shells. The one housing shell has an exhaust gas inlet, the other housing shell an exhaust gas outlet. In the interior of the muffler housing, an inner wall, and arranged between the exhaust inlet and exhaust outlet catalyst element are provided.
Eine kombinierte Abgasschalldämpfer- und Katalysatoreinheit ist weiters aus der EP 0 356 607 AI bekannt. A combined exhaust silencer and catalyst unit is further known from EP 0 356 607 AI.
Aufgabe der Erfindung ist es, auf möglichst geringem Bauraum und auf eine herstellungsmäßig einfache Weise eine hohe akustische und thermische Dämpfung bei einer Abgasanlage für eine Brennkraftmaschine zu erreichen. The object of the invention is to achieve the highest possible acoustic and thermal damping in an exhaust system for an internal combustion engine in the smallest possible space and in a simple manufacturing manner.
Erfindungsgemäß wird dies dadurch erzielt, dass der Vorschalldämpfer und der Nachschalldämpfer in einem gemeinsamen Gehäuse angeordnet ist, wobei der Vorschalldämpfer in einer ersten Kammer und der Nachschalldämpfer in einer zweiten Kammer des Gehäuses angeordnet ist, und wobei die beiden Kammern durch zumindest eine Strömungsverbindung in einer Trennwand miteinander strömungsverbunden sind. According to the invention this is achieved in that the pre-muffler and the rear muffler is arranged in a common housing, wherein the pre-muffler is arranged in a first chamber and the rear muffler in a second chamber of the housing, and wherein the two chambers by at least one flow connection in a partition wall are fluidly connected to each other.
Die beiden Kammern können sandwichartig übereinander oder nebeneinander angeordnet sein. Dadurch kann eine äußerst kompakte Bauweise ermöglicht werden. Bei Anwendung in einem Stromerzeugungsaggregat, beispielsweise einem sogenannten Range Extender für ein Elektrofahrzeug, ergibt sich der Vorteil, dass die komplette Abgasschalldämpferanordnung in die Fahrzeug-Peripherie integriert werden kann. The two chambers may be sandwiched one above the other or side by side. As a result, an extremely compact design can be made possible. When used in a power generator, such as a so-called range extender for an electric vehicle, there is the advantage that the entire exhaust muffler assembly can be integrated into the vehicle periphery.
Um den Wärmeübergang zwischen dem Vorschalldämpfer und dem Nachschalldämpfer zu verringern bzw. zu verhindern, ist es besonders vorteilhaft, wenn die Trennwand zumindest eine thermische Isolierung aufweist, wobei vorzugsweise die Trennwand eine sandwichartige Struktur mit zumindest drei Schichten auf- - - weist, wobei besonders vorzugsweise zwischen zwei Trennblechen ein Isoliermatte angeordnet ist. Um unterschiedliche thermische Längenausdehnung zwischen den beiden Schalldämpfern auszugleichen, kann die Strömungsverbindung zwischen den beiden Kammern durch ein einen Verschiebesitz normal zur Trennwand aufweisendes Verbindungsrohr gebildet sein. In order to reduce or prevent the heat transfer between the front muffler and the rear muffler, it is particularly advantageous if the partition has at least one thermal insulation, wherein preferably the partition wall has a sandwich-type structure with at least three layers. - - has, wherein an insulating mat is particularly preferably arranged between two dividing plates. To compensate for different thermal expansion between the two mufflers, the flow connection between the two chambers may be formed by a sliding seat normal to the partition exhibiting connecting pipe.
Weiters kann im Rahmen der Erfindung vorgesehen sein, dass die Gehäusewand eine thermische Isolierung, vorzugsweise eine sandwichartige Struktur mit zumindest drei Schichten, aufweist, wobei besonders vorzugsweise zwischen einer metallischen Innenwand und einer vorzugsweise metallischen Außenwand eine beispielsweise aus einer Isoliermatte bestehende Isolierschicht angeordnet ist. Die Außenwand der Gehäusewand kann aus einer zumindest einlagigen, vorzugsweise kalottengeprägten, Edelstallfolie bestehen. Die thermische Isolierung der Gehäusewand verringert die Wärmeabstrahlung, was die Einbaumöglichkeiten in einem Fahrzeug wesentlich erhöht. Furthermore, it can be provided in the context of the invention that the housing wall has a thermal insulation, preferably a sandwich-like structure with at least three layers, wherein particularly preferably between a metallic inner wall and a preferably metallic outer wall an existing example of an insulating mat insulating layer is arranged. The outer wall of the housing wall may consist of an at least single-layered, preferably dome-embossed, Edelstallfolie. The thermal insulation of the housing wall reduces the heat radiation, which significantly increases the installation options in a vehicle.
Eine besonders bevorzugte Ausführungsvariante der Erfindung sieht vor, dass in das Gehäuse zumindest ein stromaufwärts des Vorschalldämpfers zumindest eine vorzugsweise zumindest eine Katalysatoreinheit gebildete Abgasnachbehandlungseinrichtung angeordnet ist, wobei vorzugsweise das Gehäuse zumindest eine verschließbare Ausbauöffnung für den Ein- und Ausbau der Abgasnachbehandlungseinrichtung aufweist. Die Integration der Abgasnachbehandlungseinrichtung in das Gehäuse ermöglicht eine besonders kompakte Ausführung der Abgasanlage. Die Isolierung der Gehäusewand wirkt sich dabei auch vorteilhaft auf das Ansprechverhalten der Abgasnachbehandlungseinrichtung aus. A particularly preferred embodiment variant of the invention provides that at least one exhaust gas aftertreatment device formed, preferably at least one catalyst unit, is arranged in the housing, wherein the housing preferably has at least one closable expansion opening for installing and removing the exhaust gas aftertreatment device. The integration of the exhaust aftertreatment device in the housing allows a particularly compact design of the exhaust system. The insulation of the housing wall also has an advantageous effect on the response of the exhaust aftertreatment device.
Dabei kann in weiterer Ausführung der Erfindung vorgesehen sein, dass das Gehäuse einstückig mit zumindest einem vorzugsweise flexiblen Abgasrohr und/ oder einem Abgaskrümmer ausgebildet ist, wobei zur Minimierung der Wärmeabstrahlung vorgesehen sein kann, dass das Abgasrohr und/oder der Abgaskrümmer eine vorzugsweise durch eine sandwichartige Struktur gebildete Isolierung mit vorzugsweise einer zwischen zwei metallischen Schichten angeordneten Isolierschicht aufweist. It can be provided in a further embodiment of the invention that the housing is formed integrally with at least one preferably flexible exhaust pipe and / or an exhaust manifold, wherein to minimize the heat radiation may be provided that the exhaust pipe and / or the exhaust manifold, preferably by a sandwich Structure formed insulation having preferably arranged between two metallic layers insulating layer.
Eine hohe Schalldämpfung wird erreicht, wenn der Vorschalldämpfer als Reflek- tionsschalldämpfer und der Nachschalldämpfer als kombinierter Absorbtions-Re- sonator-Schalldämpfer mit zumindest zwei, vorzugsweise zumindest drei, besonders vorzugsweise vier Resonatorkammern ausgebildet ist. A high sound attenuation is achieved if the front silencer is designed as a reflection silencer and the rear silencer as a combined absorption / resonator silencer with at least two, preferably at least three, particularly preferably four resonator chambers.
Um eine einfache Fertigung zu ermöglichen, kann weiters vorgesehen sein, dass das Gehäuse aus einer Oberschale und einer Unterschale aufweist, wobei die Oberschale und die Unterschale vorzugsweise im Bereich einer Trennebene pa- - - rallel zur Trennwand miteinander verschweißt sind. Dabei ist es besonders vorteilhaft, wenn die Innenwand der Ober- und/oder Unterschale Gehäusewand aus einer Halbschale, vorzugsweise aus Blech, besteht. In order to enable a simple production, it can further be provided that the housing has an upper shell and a lower shell, the upper shell and the lower shell preferably being in the region of a parting plane. - - Are welded together rallel to the partition wall. It is particularly advantageous if the inner wall of the upper and / or lower shell housing wall of a half-shell, preferably made of sheet metal.
Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen : The invention will be explained in more detail below with reference to FIGS. Show it :
Fig. 1 eine erfindungsgemäße Schalldämpferanordnung in einer ersten 1 shows a silencer arrangement according to the invention in a first
Ausführungsvariante in einer Seitenansicht;  Embodiment variant in a side view;
Fig. 2 die Schalldämpferanordnung in einer Draufsicht; 2 shows the muffler assembly in a plan view.
Fig. 3 eine erfindungsgemäße Schalldämpferanordnung in einer zweiten Fig. 3 shows a silencer arrangement according to the invention in a second
Ausführungsvariante in einem Längsschnitt gemäß der Linie III - Variant in a longitudinal section according to the line III -
III in Fig. 4; III in Fig. 4;
Fig. 4 die Schalldämpferanordnung in einem Schnitt gemäß der Linie IV -4 shows the muffler assembly in a section along the line IV -
IV in Fig. 3; IV in Fig. 3;
Fig. 5 die Schalldämpferanordnung in einem Schnitt gemäß der Linie V -5 shows the muffler assembly in a section along the line V -
V in Fig. 3; und V in Fig. 3; and
Fig. 6 die Schalldämpferanordnung in einem Schnitt gemäß der Linie VI -6 shows the muffler assembly in a section along the line VI -
VI in Fig. 3 in einer weiteren Ausführungsvariante. VI in Fig. 3 in a further embodiment.
Die Figuren zeigen jeweils eine Abgasschalldämpferanordnung 1 mit einem Gehäuse 2, in welchem eine erste Kammer 3 und eine zweite Kammer 4 angeordnet ist. Das Gehäuse 2 besteht dabei aus einer Oberschale 2a und einer Unterschale 2b, welche miteinander im Bereich einer Trennebene ε parallel zur Trennwand 9 verschweißt sind. In der ersten Kammer 3 ist ein Vorschalldämpfer VSD und in der zweiten Kammer 4 ein Nachschalldämpfer NSD angeordnet. Im gleichen Gehäuse 2 kann eine durch eine Katalysatoreinheit 5, 5a, 5b gebildete Abgasnachbehandlungseinrichtung 6 angeordnet sein. The figures each show an exhaust muffler arrangement 1 with a housing 2, in which a first chamber 3 and a second chamber 4 is arranged. The housing 2 consists of an upper shell 2a and a lower shell 2b, which are welded together in the region of a separation plane ε parallel to the partition wall 9. In the first chamber 3, a pre-silencer VSD and in the second chamber 4, a rear silencer NSD is arranged. In the same housing 2, an exhaust gas aftertreatment device 6 formed by a catalyst unit 5, 5a, 5b may be arranged.
Einstückig mit dem Gehäuse 2 kann beispielsweise ein Abgaskrümmer 7, ein Ab- gasrohr oder flexible Abgasrohre ausgebildet sein. For example, an exhaust manifold 7, an exhaust gas pipe or flexible exhaust pipes may be formed in one piece with the housing 2.
Die Gehäusewand 8 des Gehäuses 2 weist eine sandwichartige Struktur mit mehreren Schichten auf, wobei zwischen einer durch eine Halbschale aus Blech gebildeten Innenwand 8a und einer durch beispielsweise eine kalottengeprägte Edelstahlfolie gebildeten Außenwand 8b eine Isoliermatte 8c angeordnet ist. The housing wall 8 of the housing 2 has a sandwich-like structure with a plurality of layers, wherein an insulating mat 8c is arranged between an inner wall 8a formed by a half-shell of sheet metal and an outer wall 8b formed by, for example, a dome-embossed stainless steel foil.
Die erste Kammer 3 und zweite Kammer 4 sind durch eine Trennwand 9 voneinander getrennt. Die Trennwand 9 weist ebenfalls eine sandwichartige Struktur - - auf, wobei zwischen zwei Trennblechen 9a, 9b eine Isoliermatte 9c angeordnet ist, wie im Detail aus Fig. 6 hervorgeht. The first chamber 3 and second chamber 4 are separated by a partition wall 9. The partition wall 9 also has a sandwich-like structure - -, wherein between two partitions 9a, 9b, an insulating mat 9c is arranged, as shown in detail in Fig. 6.
Im in Fig. 1 und Fig. 2 dargestelltem Ausführungsbeispiel ist die Abgasnachbehandlungseinrichtung 6 liegend angeordnet, d.h. die Strömungsachse 6 a der Abgasnachbehandlungseinrichtung 6 ist im Wesentlichen parallel zur Trennwand 9 ausgebildet. In the embodiment shown in Fig. 1 and Fig. 2, the exhaust aftertreatment device 6 is arranged horizontally, i. the flow axis 6 a of the exhaust aftertreatment device 6 is formed substantially parallel to the partition wall 9.
In den Fig. 1 und Fig. 2 ist die Nachbehandlungseinrichtung 6 liegend, also mit im wesentlichen horizontaler Strömungsachse 6a, ausgebildet. Bei der in den Fig. 3 bis Fig. 5 dargestellten Ausführung dagegen ist sind die Katalysatoreinheiten 5a, 5b der Abgasnachbehandlungseinrichtung 6 stehend positioniert, die Strömungsachse 6a der Abgasnachbehandlungseinrichtung 6 ist dabei im Wesentlichen normal zur Trennwand 9 angeordnet, wobei die Katalysatoreinheiten 5a, 5b über Abdichtringe 13 in der Trennwand 9 gelagert sind. Oberhalb der Katalysatoreinheiten 5a, 5b ist jeweils eine über einen Deckel 14 verschließbare Montageöffnung 15 vorgesehen, über welche die Katalysatoreinheiten 5a, 5b aus- und eingebaut werden können. In FIGS. 1 and 2, the aftertreatment device 6 is lying, that is, with a substantially horizontal flow axis 6a. In contrast, in the embodiment illustrated in FIGS. 3 to 5, the catalyst units 5 a, 5 b of the exhaust gas aftertreatment device 6 are positioned vertically, the flow axis 6 a of the exhaust gas aftertreatment device 6 is arranged substantially normal to the dividing wall 9, the catalyst units 5 a, 5 b via Abdichtringe 13 are mounted in the partition 9. Above the catalyst units 5a, 5b there is provided in each case a mounting opening 15 which can be closed by means of a cover 14, via which the catalyst units 5a, 5b can be removed and installed.
Der in Fig. 4 dargestellte Vorschalldämpfer VSD in der Kammer 3 ist als sogenannter Reflektionsschalldämpfer 10 ausgebildet und weist mehrere Reflexionskammern 10a, 10b auf, welche durch normal zur Trennwand 9 angeordnete Reflexionsbleche I Ia, I Ib, 11c begrenzt sind. Der Reflexionsschalldämpfer 10 weist ein Eingangsrohr 12a, ein Verbindungsrohr 12b und ein Austrittsrohr 12c auf. The pre-muffler VSD shown in FIG. 4 in the chamber 3 is designed as a so-called reflection muffler 10 and has a plurality of reflection chambers 10a, 10b, which are bounded by normal to the partition wall 9 arranged reflective plates I Ia, I Ib, 11c. The reflection muffler 10 has an input pipe 12a, a connection pipe 12b and an exhaust pipe 12c.
Der in Fig. 5 dargestellte Nachschalldämpfer NSD ist im Ausführungsbeispiel als kombinierter Absorbtions-Resonator-Schalldämpfer mit Niederfrequenz-Resonatorkammern Rl, R2, R3, R4, sowie Hochfrequenz-Absorbtionskammern ausgeführt. The rear muffler NSD shown in FIG. 5 is embodied in the exemplary embodiment as a combined absorption / resonator muffler with low-frequency resonator chambers R 1, R 2, R 3, R 4, as well as high-frequency absorption chambers.
Vorschalldämpfer VSD und Nachschalldämpfer NSD sind über ein die Trennwand 9 durchdringendes Verbindungsrohr 16 miteinander strömungsverbunden. Um temperaturbedingte Längenänderungen ausgleichen zu können, ist das Verbindungsrohr 16 in einem Schiebesitz 17 normal zur Trennwand 9 gelagert, wie in Fig. 6 erkennbar ist. Pre-muffler VSD and rear muffler NSD are fluidly connected to each other via a connecting pipe 16 penetrating the partition 9. In order to compensate for temperature-induced changes in length, the connecting tube 16 is mounted in a sliding seat 17 normal to the partition wall 9, as shown in Fig. 6 can be seen.
Das Abgas gelangt von der Brennkraftmaschine gemäß in den Fig. 3 bis Fig. 5 dargestellten Pfeilen in das Gehäuse 2 und wird über die Katalysatoreinheiten 5a, 5b in den in der ersten Kammer 3 angeordneten Vorschalldämpfer VSD geführt. Am Austritt des Vorschalldämpfers VSD strömt das Abgas über das Verbindungsrohr 16 in den in der zweiten Kammer 4 angeordneten Nachschalldämpfer NSD. Nach Durchströmen des Nachschalldämpfers NSD verlässt das Abgas das Gehäuse 2 über die Austrittsöffnung 19. - - The exhaust gas passes from the internal combustion engine according to arrows shown in FIGS. 3 to 5 into the housing 2 and is guided via the catalyst units 5 a, 5 b into the pre-silencer VSD arranged in the first chamber 3. At the outlet of the pre-silencer VSD, the exhaust gas flows via the connecting pipe 16 into the rear silencer NSD arranged in the second chamber 4. After flowing through the rear silencer NSD, the exhaust gas leaves the housing 2 via the outlet opening 19. - -
Die beschriebene Abgasschalldämpferanordnung 1 erlaube eine besonders kompakte Bauweise und die Integration des kompletten Abgasschalldämpfers, bestehend aus Vorschalldämpfer VSD und Nachschalldämpfer NSD in die Fahrzeugperipherie. The exhaust muffler assembly 1 described allow a particularly compact design and the integration of the exhaust muffler, consisting of pre-muffler VSD and rear silencer NSD in the vehicle periphery.
Die Abgasschalldämpferanordnung 1 erlaubt dabei eine besonders einfache Fertigung : Zwischen dem Vorschalldämpfer VSD und dem Nachschalldämpfer NSD wird eine Isoliermatte 9c mit einer Wanddicke zwischen 10 mm und 30 mm und einer Hitzebeständigkeit bis etwa 1.000° C eingelegt, welche den Wärmeübergang zwischen Vorschalldämpfer VSD und Nachschalldämpfer NSD verhindert. Danach werden die Vorschalldämpfer VSD und Nachschalldämpfer NSD über die Trennbleche 9a, 9b miteinander verbunden und verschweißt. Somit entsteht eine kompakte Abgasschalldämpferanordnung 1, welche primär aus Vorschalldämpfer VSD und Nachschalldämpfer NSD besteht. Der nächste Schritt ist das Aufbringen einer Isolierschicht 8c an der Innenwand 8a des Gehäuses 2. Dies kann beispielsweise durch eine auf einer Seite selbstklebenden Isoliermatte mit einer Stärke von 10 mm bis 30 mm erfolgen. Die Dauerhaftbefestigung erfolgt danach mittels einer durch etwa eine ein- oder mehrlagige kalottengeprägte Edelstahlfolie gebildeten Außenwand 8b, welche fest mit der Einheit bestehend aus Vorschalldämpfer VSD und Nachschalldämpfer NSD verschweißt wird. Die Einprägtiefe der kalottengeprägte Edelstahlfolie kann zwischen 0,1 mm und 0,9 mm betragen. The exhaust muffler assembly 1 allows a particularly simple production: Between the pre-muffler VSD and the rear muffler NSD an insulating mat 9c is inserted with a wall thickness between 10 mm and 30 mm and a heat resistance up to about 1000 ° C, which the heat transfer between the front silencer VSD and rear silencer NSD prevented. Thereafter, the pre-muffler VSD and rear muffler NSD are connected and welded together via the separating plates 9a, 9b. This results in a compact exhaust muffler arrangement 1, which consists primarily of pre-muffler VSD and rear muffler NSD. The next step is the application of an insulating layer 8c to the inner wall 8a of the housing 2. This can be done, for example, by a self-adhesive on one side insulating mat with a thickness of 10 mm to 30 mm. The permanent attachment then takes place by means of a formed by about a single or multi-layer dome embossed stainless steel foil outer wall 8b, which is firmly welded to the unit consisting of pre-silencer VSD and rear silencer NSD. The embossing depth of the dome-embossed stainless steel foil can be between 0.1 mm and 0.9 mm.
Der Aufbau des Innenlebens des Vorschalldämpfers VSD und des Nachschalldämpfers NSD ist - je nach Motorspezifikation - unterschiedlich adaptierbar. Depending on the engine specification, the design of the interior of the pre-silencer VSD and the rear silencer NSD can be adapted differently.
Dadurch, dass Vorschalldämpfer VSD und Nachschalldämpfer NSD sandwichartig übereinander in einem Gehäuse 2 angeordnet sind, kann eine äußerst kompakte Bauweise erzielt werden. Characterized in that pre-muffler VSD and rear silencer NSD are arranged sandwiched one above the other in a housing 2, an extremely compact design can be achieved.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1. Abgasschalldämpferanordnung (1) für eine Brennkraftmaschine, insbesondere eines Stromerzeugungsaggregates, mit einem Vorschalldämpfer (VSD) und einem Nachschalldämpfer (NSD), dadurch gekennzeichnet, dass der Vorschalldämpfer (VSD) und der Nachschalldämpfer (NSD) in einem gemeinsamen Gehäuse (2) angeordnet ist, wobei der Vorschalldämpfer (VSD) in einer ersten Kammer (3) und der Nachschalldämpfer (NSD) in einer zweiten Kammer (4) des Gehäuses (2) angeordnet ist, und wobei die beiden Kammern (3, 4) durch zumindest eine Strömungsverbindung in einer Trennwand (9) miteinander strömungsverbunden sind. 1. Exhaust muffler assembly (1) for an internal combustion engine, in particular a power generator, with a pre-muffler (VSD) and a rear muffler (NSD), characterized in that the pre-muffler (VSD) and the rear muffler (NSD) arranged in a common housing (2) is, wherein the pre-muffler (VSD) in a first chamber (3) and the rear muffler (NSD) in a second chamber (4) of the housing (2) is arranged, and wherein the two chambers (3, 4) by at least one flow connection in a partition wall (9) are fluidly connected to each other.
2. Abgasschalldämpferanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Kammern (3, 4) sandwichartig übereinander oder nebeneinander angeordnet sind. 2. Exhaust muffler assembly (1) according to claim 1, characterized in that the two chambers (3, 4) are arranged sandwiched one above the other or side by side.
3. Abgasschalldämpferanordnung (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Trennwand (9) zumindest eine thermische Isolierung aufweist, wobei vorzugsweise die Trennwand (9) eine sandwichartige Struktur mit zumindest drei Schichten aufweist, wobei besonders vorzugsweise zwischen zwei Trennblechen (9a, 9b) eine Isolierschicht (9c) angeordnet ist. 3. Exhaust muffler assembly (1) according to claim 1 or 2, characterized in that the partition wall (9) has at least one thermal insulation, wherein preferably the partition wall (9) has a sandwich-like structure with at least three layers, wherein particularly preferably between two separating plates ( 9a, 9b) an insulating layer (9c) is arranged.
4. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine das Gehäuse (2) zur Umgebung abgrenzende Gehäusewand (8) des Gehäuses (2) eine thermische Isolierung aufweist, wobei vorzugsweise die Gehäusewand (8) eine sandwichartige Struktur mit zumindest drei Schichten aufweist, wobei besonders vorzugsweise zwischen einer metallischen Innenwand (8a) und einer vorzugsweise metallischen Außenwand (8b) der Gehäusewand (8) eine Isolierschicht (8c) angeordnet ist. 4. exhaust silencer assembly (1) according to one of claims 1 to 3, characterized in that the housing (2) delimiting the housing wall (8) of the housing (2) has a thermal insulation, wherein preferably the housing wall (8) has a sandwich Structure having at least three layers, wherein particularly preferably between an inner metal wall (8a) and a preferably metallic outer wall (8b) of the housing wall (8) an insulating layer (8c) is arranged.
5. Abgasschalldämpferanordnung (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Außenwand (8b) der Gehäusewand (8) aus einer zumindest einlagigen, vorzugsweise kalottengeprägten, Edelstallfolie besteht. 5. Exhaust muffler assembly (1) according to claim 4, characterized in that the outer wall (8b) of the housing wall (8) consists of an at least single-layer, preferably dome embossed, noble stile film.
6. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Vorschalldämpfer (VSD) als Reflektions- schalldämpfer (10) ausgebildet ist. 6. exhaust silencer arrangement (1) according to one of claims 1 to 5, characterized in that the pre-silencer (VSD) is designed as a reflection silencer (10).
7. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Nachschalldämpfer (NSD) zumindest zwei, vorzugsweise zumindest drei, besonders vorzugsweise vier Resonatorkammern Rl, R2, R3, R4 aufweist. 7. Exhaust muffler assembly (1) according to one of claims 1 to 6, characterized in that the rear muffler (NSD) at least two, preferably at least three, more preferably four resonator Rl, R2, R3, R4.
8. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass in das Gehäuse (2) zumindest ein stromaufwärts des Vorschalldämpfers (VSD) zumindest eine vorzugsweise zumindest eine Katalysatoreinheit (5a, 5b) gebildete Abgasnachbehandlungseinrichtung (6) angeordnet ist. 8. exhaust silencer arrangement (1) according to one of claims 1 to 7, characterized in that in the housing (2) at least one upstream of the pre-silencer (VSD) at least one preferably at least one catalyst unit (5a, 5b) formed exhaust gas treatment device (6) is arranged ,
9. Abgasschalldämpferanordnung (1) nach Anspruch 8, dadurch gekennzeichnet, dass das Gehäuse (2) zumindest eine verschließbare Montageöffnung (15) für den Ein- und Ausbau der Abgasnachbehandlungseinrichtung (6) aufweist. 9. exhaust silencer arrangement (1) according to claim 8, characterized in that the housing (2) has at least one closable mounting opening (15) for the installation and removal of the exhaust gas aftertreatment device (6).
10. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Gehäuse (2) einstückig mit zumindest einem vorzugsweise flexiblen Abgasrohr und/oder einem Abgaskrümmer (7) ausgebildet ist. 10. exhaust silencer assembly (1) according to one of claims 1 to 9, characterized in that the housing (2) is formed integrally with at least one preferably flexible exhaust pipe and / or an exhaust manifold (7).
11. Abgasschalldämpferanordnung (1) nach Anspruch 10, dadurch gekennzeichnet, dass das Abgasrohr und/oder der Abgaskrümmer (7) eine vorzugsweise durch eine sandwichartige Struktur gebildete Isolierung mit vorzugsweise einer zwischen zwei metallischen Schichten angeordneten Isolierschicht aufweist. 11. Exhaust muffler assembly (1) according to claim 10, characterized in that the exhaust pipe and / or the exhaust manifold (7) has a preferably formed by a sandwich-like insulation with preferably arranged between two metallic layers insulating layer.
12. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Strömungsverbindung zwischen den beiden Kammern (3, 4) durch ein in einem Schiebesitz (17) vorzugsweise normal zur Trennwand (9) verschiebbares Verbindungsrohr (16) gebildet ist. 12. exhaust silencer arrangement (1) according to one of claims 1 to 11, characterized in that the flow connection between the two chambers (3, 4) by a sliding in a sliding seat (17) preferably normal to the partition wall (9) displaceable connecting tube (16) is.
13. Abgasschalldämpferanordnung (1) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das Gehäuse (2) aus einer Oberschale (2a) und einer Unterschale (2b) aufweist, wobei die Oberschale (2a) und die Unterschale (2b) vorzugsweise im Bereich einer Trennebene (ε) parallel zur Trennwand (9) miteinander verschweißt sind. 13. exhaust silencer assembly (1) according to one of claims 1 to 12, characterized in that the housing (2) of an upper shell (2a) and a lower shell (2b), wherein the upper shell (2a) and the lower shell (2b) preferably are welded together in the region of a parting plane (ε) parallel to the partition wall (9).
14. Abgasschalldämpferanordnung (1) nach Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Innenwand (8a) des Gehäuses (2) aus zumindest einer Halbschale, vorzugsweise aus Blech, besteht. 14 exhaust muffler assembly (1) according to claims 1 to 13, characterized in that the inner wall (8 a) of the housing (2) consists of at least one half-shell, preferably made of sheet metal.
2011 10 19 2011 10 19
Fu/Ka Fu / Ka
EP11776425.8A 2010-10-28 2011-10-27 Exhaust gas muffler arrangement Not-in-force EP2633162B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1788/2010A AT510788B1 (en) 2010-10-28 2010-10-28 EXHAUST MUFFLER ARRANGEMENT
PCT/EP2011/068829 WO2012055949A1 (en) 2010-10-28 2011-10-27 Exhaust gas muffler arrangement

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EP2633162B1 EP2633162B1 (en) 2015-01-21

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CN (1) CN103261593B (en)
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JP2013540948A (en) 2013-11-07
CN103261593A (en) 2013-08-21
AT510788A1 (en) 2012-06-15
CN103261593B (en) 2018-02-02
WO2012055949A1 (en) 2012-05-03
AT510788B1 (en) 2012-10-15
EP2633162B1 (en) 2015-01-21

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