EP0931913A1 - Exhaust silencer for internal combustion engines - Google Patents

Exhaust silencer for internal combustion engines Download PDF

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Publication number
EP0931913A1
EP0931913A1 EP99100291A EP99100291A EP0931913A1 EP 0931913 A1 EP0931913 A1 EP 0931913A1 EP 99100291 A EP99100291 A EP 99100291A EP 99100291 A EP99100291 A EP 99100291A EP 0931913 A1 EP0931913 A1 EP 0931913A1
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EP
European Patent Office
Prior art keywords
chamber
exhaust gas
housing
exhaust
silencer according
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
EP99100291A
Other languages
German (de)
French (fr)
Other versions
EP0931913B1 (en
Inventor
Siegfried Wörner
Rudolf Buhmann
Marcus Werni
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP0931913A1 publication Critical patent/EP0931913A1/en
Application granted granted Critical
Publication of EP0931913B1 publication Critical patent/EP0931913B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F01N13/009—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 two or more separate purifying devices arranged in series
    • F01N13/0097—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 two or more separate purifying devices arranged in series the purifying devices are arranged 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
    • 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
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • 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
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
    • 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
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of 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
    • F01N2470/30—Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
    • 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 for internal combustion engines with intermittent combustion, in particular for engines of heavy commercial vehicles, with a housing, which in several of the exhaust gas under multiple reflection flowed through chambers is divided and one in the housing Exhaust gas inlet line leading to an exhaust gas inlet chamber and one leading out of the housing from an exhaust gas outlet chamber has outgoing exhaust gas outlet line.
  • Such exhaust silencers are in today's motor vehicles available as standard. Through multiple reflection of the exhaust gas flow in the chambers through which the exhaust gas flows, i.e. due to the reflective construction of at least part of the chambers, can achieve particularly effective noise reduction be particularly interfering because of the reflections pronounced, which is an at least partial extinction of sound waves.
  • the reflection design relatively long pipe sections of the exhaust gas inlet and / or the exhaust gas outlet line within housing. This is desirable because the lines mentioned with those with them directly communicating chambers functionally as flowed through Helmholtz resonators, which with increasing Cable length has an attenuation effect at increasingly lower frequencies become. These low frequencies have in internal combustion engines, especially when it is comparatively slow running engines of commercial vehicles, a particularly large one Share in the noise spectrum.
  • the exhaust gas flow through a catalyst to conduct, for example to disassemble nitrogen oxides and / or Afterburning oxidisable components in the exhaust gas flow.
  • the object of the invention is now, catalyst and silencer to combine in an advantageous manner.
  • the invention is based on the general idea of a catalyst module to integrate into the silencer housing and thereby by the reflection construction of the exhaust gas entrance chamber as well as the exhaust gas inlet line passed through the catalyst body a comparatively long exhaust gas inlet pipe to enable it, on the one hand, acoustically to reduce noise and on the other hand mechanically for safe support the exhaust gas inlet pipe in the housing is desirable is.
  • the concept can be realized with the invention for optimal thermal conditions on the catalyst to be taken care of by the exhaust gas flowing through the catalytic converter Chamber is encased.
  • This can be done in a simpler way In this way, achieve that the catalyst in the flow direction the chamber immediately downstream of the exhaust gases is designed in a reflective design and with a catalyst encasing chamber communicates.
  • At least part of the chambers of the muffler housing is formed in absorption construction, the absorption material in addition to its sound absorbing function can take on the task of thermal insulation. Furthermore the absorption material is preferably arranged such that structure-borne noise of the muffler housing is also damped.
  • the housing 1 of the invention Exhaust silencer a circumferential jacket 2 and one in Fig. 1 upper outer floor 3 and one in this figure lower outer floor 4.
  • the outer floors have 3 and 4 analogous to the contour of the sectional view of FIG. 2 rectangular shape with rounded corners and outwards curved longitudinal and transverse edges.
  • the contour of the contour in plan view corresponds to the outer floors 3 and 4, i.e. the inner floors 5 and 6 are on their entire outer edge with the peripheral jacket 2 connected.
  • a further perforated inner floor 7 is arranged, which on its left in Figures 1 and 2 to a closed Inner wall 8 is adjacent, which is between the floors 3 and 6 extends in a plane perpendicular to these floors and adjoins the peripheral jacket 2 between these floors and connected to it.
  • the inner floors 5 to 7 have coaxial axes Circular openings into which an open at one end Pot-like catalyst housing 9 is used, such that whose bottom 9 'occupies an adjacent position to the outer bottom 4.
  • the bottom 9 'of the catalyst housing 9 is vaulted formed, with a contact between the bottom 9 ' the catalyst housing 9 and the outer bottom 4 prevented is that the outer bottom 4 in the area of the bottom 9 ' of the catalyst housing 9 a projecting to the outside of the housing Has expression.
  • the Holder in the catalytic converter housing 9 in a generally known manner Way through a compressed wire mesh or Wire fleece wrapping 11 is carried out, which is carried out with heating swelling material is embedded to make it gas-tight Sealing between the wall of the catalyst housing 9 and the adjacent outer periphery of the catalyst body 10 to ensure.
  • the catalyst body 10 has a central opening, which an exhaust gas inlet pipe 12 receives. This is as an angle tube formed, the one pipe leg said central opening of the catalyst body 10 and the other Pipe legs near the outer bottom 3 by a corresponding Opening in the peripheral jacket 2 is passed.
  • the exhaust gas inlet pipe 12 Within of the catalyst body 10 is the exhaust gas inlet pipe 12 by a compressed wire mesh or wire fleece covering 13 recorded, which in turn in source material is embedded around the annular gap between the exhaust gas inlet pipe 12 and close the central opening of the catalyst body 10 gas-tight.
  • an exhaust gas outlet pipe within the housing 1 14 On the side of the inner wall facing away from the catalyst housing 9 8 is an exhaust gas outlet pipe within the housing 1 14 arranged, which according to FIG. 3 essentially the shape of a 270 ° arc, wherein the housing-internal entrance opening 14 'of the exhaust gas outlet pipe 14 approximately in the Level of the perforated inner bottom 6 is arranged and the Output 14 ′′ of the exhaust gas outlet pipe 14 according to FIG. 2 in the area a rounded edge of the peripheral jacket 4 by the same is passed through.
  • the 270 ° arc mentioned extends in a plane approximately parallel to the inner wall 8.
  • the exhaust gas outlet pipe 14 is segmented, wherein the entrance 14 'of this tube through a straight perforated Pipe piece 15 is formed, which in a corresponding Opening of the inner bottom 6 used and level this Inner floor 6 is aligned approximately vertically.
  • To this Pipe piece 15 includes two perforated half-shells formed elbow 16, which in turn by a perforated pipe section 17 is continued in the same Way as the pipe section 15 is perforated. That connects another angle piece 18, its structure and Design corresponds to the elbow 16.
  • This contra-angle 18 continues through an arcuate tailpipe 19, which has a closed wall and through a corresponding opening of the inner bottom 6 and subsequently is passed through the peripheral jacket 2.
  • the space between the outer floor 4 and the inner floor 5 is with absorbent material, e.g. Wire fleece, filled so that this space forms an absorption chamber 20.
  • Another Absorption chamber 21 is through the space between the outer floor 3 and the inner floor 6 on the from the catalyst housing 9 or the side of the inner wall facing away from the catalyst body 10 8 formed, i.e. this room is also with absorption material filled.
  • the exhaust gas passes over according to the arrows the exhaust gas inlet pipe 12 into an exhaust gas inlet chamber 22, the through the space between the closed bottom 9 'of the catalyst housing 9 and the facing end of the catalyst body 10 is formed.
  • This chamber 22 is a reflection chamber, i.e. the direction of the exhaust gas flow is redirected, and the exhaust gas now flows through channels or porosities of the catalyst body 10 in a downstream chamber 23, which from the input end of the exhaust gas inlet pipe 12 is penetrated and between the outer floor 3 and the inner floor 7 up to the closed inner wall 8 is extended.
  • This chamber 23 is also designed as a reflection chamber, i.e. the exhaust gas flow is redirected and passed through now the perforated inner floor 7 and subsequently one Resonator chamber 24, which between the inner floors 6 and 7 as the catalyst housing 9 of the catalyst body 10 enclosing Annular space is formed.
  • the exhaust gas stream then passes through the perforated inner floor 6 and enters an exhaust gas outlet chamber 25 which lies between the inner floors 5 and 6 and the catalyst housing 9 also encloses in a ring.
  • This exhaust gas outlet chamber 25 is also of a reflective construction executed, i.e. the direction of flow of the exhaust gases is again vice versa, and the exhaust gas flow thus enters the exhaust gas outlet pipe 14 one and ultimately out of the housing 1.
  • the absorption chambers are parallel to the exhaust gas outlet chamber 25 20 and 21 connected, into which the exhaust gases and the Sound waves enter through the perforated inner floors 5 and 6 capital.
  • the absorption chamber 21 can the exhaust gases also through the perforations in the wall Exceed the exhaust gas outlet line 14.
  • a venturi nozzle 26 can be arranged in the exhaust gas outlet pipe 14 to further improve sound absorption, in particular in the low frequency range.

Abstract

Exhaust gas flows via the inlet pipe (12) into exhaust the inlet chamber (22) , in which the gas is deflected to flow centrally through the catalyst body (10) to a downstream chamber (23) at the opposite end face of the catalyst body, through which the end piece of the inlet pipe passes. Preferably the outlet chamber communicates with a resonator chamber (24).

Description

Die Erfindung betrifft einen Abgasschalldämpfer für Verbrennungsmotoren mit intermittierender Verbrennung, insbesondere für Motoren von schweren Nutzfahrzeugen, mit einem Gehäuse, welches in mehrere vom Abgas unter mehrfacher Reflexion durchströmte Kammern unterteilt ist sowie eine in das Gehäuse zu einer Abgaseingangskammer führende Abgaseingangsleitung und eine aus dem Gehäuse herausführende, von einer Abgasausgangskammer ausgehende Abgasausgangsleitung aufweist.The invention relates to an exhaust silencer for internal combustion engines with intermittent combustion, in particular for engines of heavy commercial vehicles, with a housing, which in several of the exhaust gas under multiple reflection flowed through chambers is divided and one in the housing Exhaust gas inlet line leading to an exhaust gas inlet chamber and one leading out of the housing from an exhaust gas outlet chamber has outgoing exhaust gas outlet line.

Derartige Abgasschalldämpfer sind bei heutigen Kraftfahrzeugen serienmäßig vorhanden. Durch mehrfache Reflexion des Abgasstromes in den vom Abgas durchströmten Kammern, d.h. durch Reflexionsbauweise zumindest eines Teils der Kammern, kann eine besonders wirksame Geräuschverminderung erreicht werden, da aufgrund der Reflexionen Interferenzen besonders ausgeprägt auftreten, die eine zumindest teilweise Auslöschung von Schallwellen bewirken. Im übrigen ermöglicht die Reflexionsbauweise, relativ lange Leitungsteile der Abgaseingangseinleitung und/oder der Abgasausgangsleitung innerhalb des Gehäuses unterzubringen. Dies ist deshalb wünschenswert, weil die genannten Leitungen mit den mit ihnen unmittelbar kommunizierenden Kammern funktionsmäßig als durchströmte Helmholtz-Resonatoren wirken, die mit zunehmender Leitungslänge bei zunehmend tieferen Frequenzen dämpfungswirksam werden. Diese tiefen Frequenzen haben bei Verbrennungsmotoren, insbesondere bei vergleichsweise langsam laufenden Motoren von Nutzfahrzeugen, einen besonders großen Anteil am Geräuschspektrum.Such exhaust silencers are in today's motor vehicles available as standard. Through multiple reflection of the exhaust gas flow in the chambers through which the exhaust gas flows, i.e. due to the reflective construction of at least part of the chambers, can achieve particularly effective noise reduction be particularly interfering because of the reflections pronounced, which is an at least partial extinction of sound waves. For the rest possible the reflection design, relatively long pipe sections of the exhaust gas inlet and / or the exhaust gas outlet line within housing. This is desirable because the lines mentioned with those with them directly communicating chambers functionally as flowed through Helmholtz resonators, which with increasing Cable length has an attenuation effect at increasingly lower frequencies become. These low frequencies have in internal combustion engines, especially when it is comparatively slow running engines of commercial vehicles, a particularly large one Share in the noise spectrum.

Im Hinblick auf möglichst schadstoffarme Abgase ist es bekannt und erwünscht, den Abgasstrom durch einen Katalysator zu leiten, um beispielsweise Stickoxyde zu zerlegen und/oder oxydierbare Bestandteile im Abgastrom nachzuverbrennen.With regard to exhaust gases that are as low in pollutants as possible, it is known and desirably the exhaust gas flow through a catalyst to conduct, for example to disassemble nitrogen oxides and / or Afterburning oxidisable components in the exhaust gas flow.

Aufgabe der Erfindung ist es nun, Katalysator und Schalldämpfer in vorteilhafter Weise zu kombinieren.The object of the invention is now, catalyst and silencer to combine in an advantageous manner.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß bei einem Abgasschalldämpfer der eingangs angegebenen Art die Abgaseingangsleitung einen im Gehäuse angeordneten Katalysatorkörper zentral durchsetzt und die stirnseitig des Katalysatorkörpers angeordnete, in Reflextionsbauweise ausgebildete Abgaseingangskammer über den Katalysatorkörper mit einer an dessen anderer Stirnseite angeordneten nachgeschalteten Kammer verbunden ist. This object is achieved in that an exhaust silencer of the type specified in the Exhaust gas inlet line a catalyst body arranged in the housing centrally penetrated and the front of the catalyst body arranged, designed in reflection construction Exhaust gas inlet chamber over the catalyst body with a arranged downstream on its other end face Chamber is connected.

Die Erfindung beruht auf dem allgemeinen Gedanken, ein Katalysatormodul in das Schalldämpfergehäuse zu integrieren und dabei durch die Reflexionsbauweise der Abgaseingangskammer sowie die durch den Katalysatorkörper hindurchgeführte Abgaseingangsleitung eine vergleichsweise lange Abgaseingangsleitung zu ermöglichen, wie es einerseits akustisch zur Geräuschdämpfung und andererseits mechanisch zur sicheren Abstützung der Abgaseingangsleitung im Gehäuse wünschenswert ist.The invention is based on the general idea of a catalyst module to integrate into the silencer housing and thereby by the reflection construction of the exhaust gas entrance chamber as well as the exhaust gas inlet line passed through the catalyst body a comparatively long exhaust gas inlet pipe to enable it, on the one hand, acoustically to reduce noise and on the other hand mechanically for safe support the exhaust gas inlet pipe in the housing is desirable is.

Insbesondere kann mit der Erfindung das Konzept verwirklicht werden, für optimale thermische Verhältnisse am Katalysator zu sorgen, indem der Katalysator von einer vom Abgas durchströmten Kammer ummantelt wird. Dies läßt sich in einfacher Weise dadurch erreichen, daß eine dem Katalysator im Strömungsrichtung der Abgase unmittelbar nachgeschaltete Kammer in Reflexionsbauweise ausgebildet ist und mit einer den Katalysator ummantelnden Kammer kommuniziert.In particular, the concept can be realized with the invention for optimal thermal conditions on the catalyst to be taken care of by the exhaust gas flowing through the catalytic converter Chamber is encased. This can be done in a simpler way In this way, achieve that the catalyst in the flow direction the chamber immediately downstream of the exhaust gases is designed in a reflective design and with a catalyst encasing chamber communicates.

Zumindest ein Teil der Kammern des Schalldämpfergehäuses ist in Absorptionsbauweise ausgebildet, wobei das Absorptionsmaterial neben seiner den Schall absorbierenden Funktion auch die Aufgabe einer Wärmedämmung übernehmen kann. Im übrigen ist das Absorptionsmaterial vorzugsweise so angeordnet, daß auch Körperschall des Schalldämpfergehäuses bedämpft wird. At least part of the chambers of the muffler housing is formed in absorption construction, the absorption material in addition to its sound absorbing function can take on the task of thermal insulation. Furthermore the absorption material is preferably arranged such that structure-borne noise of the muffler housing is also damped.

Weitere bevorzugte Merkmale der Erfindung gehen aus den Ansprüchen sowie der nachfolgenden Erläuterung der Zeichnung hervor, anhand der eine besonders bevorzugte Ausführungsform beschrieben wird.Further preferred features of the invention emerge from the claims and the following explanation of the drawing , based on which a particularly preferred embodiment is described.

Dabei zeigt

Fig. 1
einen Längsschnitt des erfindungsgemäßen Schalldämpfers, wobei die Schnittebene die Achse der Abgaseingangsleitung sowie die Zentralachse des Katalysatorkörpers enthält,
Fig. 2
ein Schnittbild entsprechend der Schnittebene II-II in Fig. 1, wobei die Lage der Schnittebene der Fig. 1 in Fig. 2 durch die Schnittlinie I-I angedeutet ist, und
Fig. 3
ein Schnittbild entsprechenden den Schnittlinien III-III in den Fig. 1 und 2, wobei die Schnittebenen der Fig. 1 und 2 in Fig. 3 durch die Schnittlinien I-I und II-II angezeigt werden.
It shows
Fig. 1
2 shows a longitudinal section of the muffler according to the invention, the section plane containing the axis of the exhaust gas inlet line and the central axis of the catalytic converter body,
Fig. 2
2 shows a sectional view corresponding to the sectional plane II-II in FIG. 1, the position of the sectional plane of FIG. 1 being indicated by the sectional line II in FIG. 2, and
Fig. 3
a sectional view corresponding to the section lines III-III in FIGS. 1 and 2, the section planes of FIGS. 1 and 2 in FIG. 3 being indicated by section lines II and II-II.

Gemäß den Fig. 1 bis 3 besitzt das Gehäuse 1 des erfindungsgemäßen Abgasschalldämpfers einen Umfangsmantel 2 sowie einen in Fig. 1 oberen Außenboden 3 und einen in dieser Figur unteren Außenboden 4. In Draufsicht besitzen die Außenböden 3 und 4 analog der Kontur des Schnittbildes der Fig. 2 eine rechteckartige Form mit abgerundeten Ecken und nach außen gewölbten Längs- und Querrändern. 1 to 3, the housing 1 of the invention Exhaust silencer a circumferential jacket 2 and one in Fig. 1 upper outer floor 3 and one in this figure lower outer floor 4. In top view, the outer floors have 3 and 4 analogous to the contour of the sectional view of FIG. 2 rectangular shape with rounded corners and outwards curved longitudinal and transverse edges.

Innerhalb des Gehäuses 1 sind zwei zu den Ebenen der vorgenannten Außenböden 3 und 4 parallele, perforierte Innenböden 5 und 6 angeordnet, deren Kontur in Draufsicht der Kontur der Außenböden 3 und 4 entspricht, d.h. die Innenböden 5 und 6 sind an ihrem gesamten Außenrand mit dem Umfangsmantel 2 verbunden. Zwischen dem oberen Außenboden 3 und dem Innenboden 6 ist ein weiterer perforierter Innenboden 7 angeordnet, welcher an seinem in den Fig.1 und 2 linken Rand an eine geschlossene Innenwand 8 angrenzt, die sich zwischen den Böden 3 und 6 in einer zu diesen Böden senkrechten Ebene erstreckt und zwischen diesen Böden an den Umfangsmantel 2 angrenzt und mit demselben verbunden ist.Within the housing 1 are two to the levels of the aforementioned Outer shelves 3 and 4 parallel, perforated inner shelves 5 and 6 arranged, the contour of the contour in plan view corresponds to the outer floors 3 and 4, i.e. the inner floors 5 and 6 are on their entire outer edge with the peripheral jacket 2 connected. Between the upper outer floor 3 and the inner floor 6 a further perforated inner floor 7 is arranged, which on its left in Figures 1 and 2 to a closed Inner wall 8 is adjacent, which is between the floors 3 and 6 extends in a plane perpendicular to these floors and adjoins the peripheral jacket 2 between these floors and connected to it.

Die Innenböden 5 bis 7 weisen zueinander gleichachsige Kreisöffnungen auf, in die ein an einer Stirnseite offenes topfartiges Katalysatorgehäuse 9 eingesetzt ist, derart, daß dessen Boden 9' eine benachbarte Lage zum Außenboden 4 einnimmt. Der Boden 9' des Katalysatorgehäuses 9 ist gewölbeartig ausgebildet, wobei eine Berührung zwischen dem Boden 9' des Katalysatorgehäuses 9 und dem Außenboden 4 dadurch verhindert wird, daß der Außenboden 4 im Bereich des Bodens 9' des Katalysatorgehäuses 9 eine zur Gehäuseaußenseite vorspringende Ausprägung aufweist.The inner floors 5 to 7 have coaxial axes Circular openings into which an open at one end Pot-like catalyst housing 9 is used, such that whose bottom 9 'occupies an adjacent position to the outer bottom 4. The bottom 9 'of the catalyst housing 9 is vaulted formed, with a contact between the bottom 9 ' the catalyst housing 9 and the outer bottom 4 prevented is that the outer bottom 4 in the area of the bottom 9 ' of the catalyst housing 9 a projecting to the outside of the housing Has expression.

Innerhalb des Katalysatorgehäuses 9 ist mit axialem Abstand von desse Boden 9' ein Katalysatorkörper 10 eingesetzt, dessen Halterung im Katalysatorgehäuse 9 in grundsätzlich bekannter Weise durch eine komprimierte Drahtgewebe- bzw. Drahtvlies-Umhüllung 11 erfolgt, die in unter Hitzeeinwikung aufquellendes Material eingebettet ist, um eine gasdichte Abdichtung zwischen der Wandung des Katalysatorgehäuses 9 und dem benachbarten Außenumfang des Katalysatorkörpers 10 zu gewährleisten.Within the catalyst housing 9 is at an axial distance from whose bottom 9 'a catalyst body 10 is used, the Holder in the catalytic converter housing 9 in a generally known manner Way through a compressed wire mesh or Wire fleece wrapping 11 is carried out, which is carried out with heating swelling material is embedded to make it gas-tight Sealing between the wall of the catalyst housing 9 and the adjacent outer periphery of the catalyst body 10 to ensure.

Der Katalysatorkörper 10 besitzt eine Zentralöffnung, welche ein Abgaseingangsrohr 12 aufnimmt. Dieses ist als Winkelrohr ausgebildet, wobei der eine Rohrschenkel die genannte Zentralöffnung des Katalysatorkörpers 10 durchsetzt und der andere Rohrschenkel nahe des Außenbodens 3 durch eine entsprechende Öffnung im Umfangsmantel 2 hindurchgeführt ist. Innerhalb des Katalysatorkörpers 10 ist das Abgaseingangsrohr 12 durch eine komprimierte Drahtgewebe- bzw. Drahtvlies-Umhüllung 13 festgehalten, die wiederum in Quellmaterial eingebettet ist, um den Ringspalt zwischen Abgaseingangsrohr 12 und Zentralöffnung des Katalysatorkörpers 10 gasdicht abzuschließen.The catalyst body 10 has a central opening, which an exhaust gas inlet pipe 12 receives. This is as an angle tube formed, the one pipe leg said central opening of the catalyst body 10 and the other Pipe legs near the outer bottom 3 by a corresponding Opening in the peripheral jacket 2 is passed. Within of the catalyst body 10 is the exhaust gas inlet pipe 12 by a compressed wire mesh or wire fleece covering 13 recorded, which in turn in source material is embedded around the annular gap between the exhaust gas inlet pipe 12 and close the central opening of the catalyst body 10 gas-tight.

Auf der vom Katalysatorgehäuse 9 abgewandten Seite der Innenwand 8 ist innerhalb des Gehäuses 1 ein Abgasausgangsrohr 14 angeordnet, welches gemäß Fig. 3 im wesentlichen die Form eines 270°-Bogens aufweist, wobei die gehäuseinnere Eingangsöffnung 14' des Abgasausgangsrohrs 14 annähernd in der Ebene des perforierten Innenbodens 6 angeordnet ist und der Ausgang 14'' des Abgasausgangsrohrs 14 gemäß Fig. 2 im Bereich einer gerundeten Kante des Umfangsmantels 4 durch denselben hindurchgeführt ist. Der genannte 270°-Bogen erstreckt sich in einer zur Innenwand 8 etwa parallelen Ebene.On the side of the inner wall facing away from the catalyst housing 9 8 is an exhaust gas outlet pipe within the housing 1 14 arranged, which according to FIG. 3 essentially the shape of a 270 ° arc, wherein the housing-internal entrance opening 14 'of the exhaust gas outlet pipe 14 approximately in the Level of the perforated inner bottom 6 is arranged and the Output 14 ″ of the exhaust gas outlet pipe 14 according to FIG. 2 in the area a rounded edge of the peripheral jacket 4 by the same is passed through. The 270 ° arc mentioned extends in a plane approximately parallel to the inner wall 8.

Das Abgasausgangsrohr 14 ist segmentiert aufgebaut, wobei der Eingang 14' dieses Rohres durch ein gerades perforiertes Rohrstück 15 gebildet wird, welches in eine entsprechende Öffnung des Innenbodens 6 eingesetzt und zur Ebene dieses Innenbodens 6 etwa senkrecht ausgerichtet ist. An dieses Rohrstück 15 schließt ein aus zwei perforierten Halbschalen gebildetes Winkelstück 16 an, welches dann seinerseits durch ein perforiertes Rohrstück 17 fortgesetzt wird, das in gleicher Weise wie das Rohrstück 15 perforiert ist. Daran schließt ein weiteres Winkelstück 18 an, dessen Aufbau und Ausgestaltung dem Winkelstück 16 entspricht. Dieses Winkelstück 18 wird fortgesetzt durch ein bogenförmiges Endrohrstück 19, welches eine geschlossene Wandung aufweist und durch eine entsprechende Öffnung des Innenbodens 6 und nachfolgend durch den Umfangsmantel 2 hindurchgeführt ist.The exhaust gas outlet pipe 14 is segmented, wherein the entrance 14 'of this tube through a straight perforated Pipe piece 15 is formed, which in a corresponding Opening of the inner bottom 6 used and level this Inner floor 6 is aligned approximately vertically. To this Pipe piece 15 includes two perforated half-shells formed elbow 16, which in turn by a perforated pipe section 17 is continued in the same Way as the pipe section 15 is perforated. That connects another angle piece 18, its structure and Design corresponds to the elbow 16. This contra-angle 18 continues through an arcuate tailpipe 19, which has a closed wall and through a corresponding opening of the inner bottom 6 and subsequently is passed through the peripheral jacket 2.

Der Raum zwischen dem Außenboden 4 und dem Innenboden 5 ist mit Absorptionsmaterial, z.B. Drahtvlies, ausgefüllt, so daß dieser Raum eine Absorptionskammer 20 bildet. Eine weitere Absorptionskammer 21 wird durch den Raum zwischen dem Außenboden 3 und dem Innenboden 6 auf der vom Katalysatorgehäuse 9 bzw. vom Katalysatorkörper 10 abgewandten Seite der Innenwand 8 gebildet, d.h. dieser Raum ist gleichfalls mit Absorptionsmaterial gefüllt.The space between the outer floor 4 and the inner floor 5 is with absorbent material, e.g. Wire fleece, filled so that this space forms an absorption chamber 20. Another Absorption chamber 21 is through the space between the outer floor 3 and the inner floor 6 on the from the catalyst housing 9 or the side of the inner wall facing away from the catalyst body 10 8 formed, i.e. this room is also with absorption material filled.

Beim Betrieb gelangt das Abgas entsprechend den Pfeilen über das Abgaseingangsrohr 12 in eine Abgaseingangskammer 22, die durch den Raum zwischen dem geschlossenen Boden 9' des Katalysatorgehäuses 9 und der zugewandten Stirnseite des Katalysatorkörpers 10 gebildet wird. Diese Kammer 22 ist eine Reflexionskammer, d.h. die Richtung des Abgasstromes wird umgelenkt, und das Abgas strömt nun durch Kanäle bzw. Porösitäten des Katalysatorkörpers 10 in eine nachgeschaltete Kammer 23, welche von dem eingangsseitigen Endstück des Abgaseingangsrohrs 12 durchsetzt wird und zwischen dem Außenboden 3 und dem Innenboden 7 bis zur geschlossenen Innenwand 8 erstreckt ist.During operation, the exhaust gas passes over according to the arrows the exhaust gas inlet pipe 12 into an exhaust gas inlet chamber 22, the through the space between the closed bottom 9 'of the catalyst housing 9 and the facing end of the catalyst body 10 is formed. This chamber 22 is a reflection chamber, i.e. the direction of the exhaust gas flow is redirected, and the exhaust gas now flows through channels or porosities of the catalyst body 10 in a downstream chamber 23, which from the input end of the exhaust gas inlet pipe 12 is penetrated and between the outer floor 3 and the inner floor 7 up to the closed inner wall 8 is extended.

Auch diese Kammer 23 ist als Reflexionskammer ausgebildet, d.h. der Abgasstrom wird erneut umgelenkt und durchsetzt nunmehr den perforierten Innenboden 7 und nachfolgend eine Resonatorkammer 24, die zwischen den Innenböden 6 und 7 als das Katalysatorgehäuse 9 des Katalysatorkörpers 10 umschließender Ringraum ausgebildet ist.This chamber 23 is also designed as a reflection chamber, i.e. the exhaust gas flow is redirected and passed through now the perforated inner floor 7 and subsequently one Resonator chamber 24, which between the inner floors 6 and 7 as the catalyst housing 9 of the catalyst body 10 enclosing Annular space is formed.

Nachfolgend durchsetzt der Abgasstrom den perforierten Innenboden 6 und gelangt in eine Abgasausgangskammer 25, die zwischen den Innenböden 5 und 6 liegt und das Katalysatorgehäuse 9 ebenfalls ringförmig umschließt. The exhaust gas stream then passes through the perforated inner floor 6 and enters an exhaust gas outlet chamber 25 which lies between the inner floors 5 and 6 and the catalyst housing 9 also encloses in a ring.

Auch diese Abgasausgangskammer 25 ist in Reflexionsbauweise ausgeführt, d.h. die Strömungsrichtung der Abgase wird erneut umgekehrt, und der Abgasstrom tritt damit in das Abgasausgangsrohr 14 ein und letztendlich aus dem Gehäuse 1 heraus.This exhaust gas outlet chamber 25 is also of a reflective construction executed, i.e. the direction of flow of the exhaust gases is again vice versa, and the exhaust gas flow thus enters the exhaust gas outlet pipe 14 one and ultimately out of the housing 1.

Parallel zur Abgasausgangskammer 25 sind die Absorptionskammern 20 und 21 angeschlossen, in die die Abgase bzw. die Schallwellen über die perforierten Innenböden 5 und 6 einzutreten vermögen. Im Falle der Absorptionskammer 21 können die Abgase auch noch über die Perforationen in der Wandung der Abgasausgangsleitung 14 übertreten.The absorption chambers are parallel to the exhaust gas outlet chamber 25 20 and 21 connected, into which the exhaust gases and the Sound waves enter through the perforated inner floors 5 and 6 capital. In the case of the absorption chamber 21 can the exhaust gases also through the perforations in the wall Exceed the exhaust gas outlet line 14.

Im Abgasausgangsrohr 14 kann eine Venturidüse 26 angeordnet sein, um die Schalldämpfung noch weiter zu verbessern, insbesondere im Bereich tiefer Frequenzen. A venturi nozzle 26 can be arranged in the exhaust gas outlet pipe 14 to further improve sound absorption, in particular in the low frequency range.

BezugszeichenlisteReference list

11
Gehäusecasing
22nd
UmfangsmantelCircumferential jacket
33rd
Außenboden (oben)Outer floor (top)
44th
Außenboden (unten)Outer floor (bottom)
55
Innenboden (unten)Inside floor (bottom)
66
Innenboden (mitte)Inner floor (middle)
77
InnenbodenInterior floor
88th
InnenwandInterior wall
99
KatalysatorgehäuseCatalytic converter housing
9'9 '
Boden von 9Floor of 9
1010th
KatalysatorkörperCatalyst body
1111
Drahtgewebe-UmhüllungWire mesh covering
1212th
AbgaseingangsrohrExhaust gas inlet pipe
1313
Drahtgewebe-UmhüllungWire mesh covering
1414
AbgasausgangsrohrExhaust pipe
14'14 '
Eingangentrance
14''14 ''
Ausgangexit
1515
RohrstückPipe piece
1616
WinkelstückElbow
1717th
RohrstückPipe piece
1818th
Winkelstück Elbow
1919th
EndrohrstückTail pipe section
2020th
AbsorptionskammerAbsorption chamber
2121
AbsorptionskammerAbsorption chamber
2222
AbgaseingangskammerExhaust chamber
2323
nachgeschaltete Kammerdownstream chamber
2424th
ResonatorkammerResonator chamber
2525th
AbgasausgangskammerExhaust gas outlet chamber
2626
VenturidüseVenturi nozzle

Claims (27)

Abgasschalldämpfer für Verbrennungsmotoren mit intermittierender Verbrennung, insbesondere für Motoren von schweren Nutzfahrzeugen, mit einem Gehäuse, welches in mehrere vom Abgas unter mehrfacher Reflexion durchströmte Kammern unterteilt ist und eine in das Gehäuse zu einer Abgaseingangskammer führende Abgaseinleitung und eine aus dem Gehäuse herausführende, von einer Abgasausgangskammer ausgehende Abgasausgangsleitung aufweist,
dadurch gekennzeichnet, daß die Abgaseingangsleitung (12) einen im Gehäuse (1) angeordneten Katalysatorkörper (10) zentral durchsetzt und die stirnseitig des Katalysatorkörpers (10) angeordnete, in Reflexionsbauweise ausgebildete Abgaseingangskammer (22) über den Katalysatorkörper (10) mit einer an dessen anderer Stirnseite angeordneten nachgeschalteten Kammer (23) verbunden ist. Exhaust muffler for internal combustion engines with intermittent combustion, in particular for engines of heavy commercial vehicles, with a housing which is divided into several chambers through which the exhaust gas flows under multiple reflection and an exhaust gas inlet leading into the housing to an exhaust gas inlet chamber and one leading out of the housing from an exhaust gas outlet chamber has outgoing exhaust gas outlet line,
characterized by that the exhaust gas inlet line (12) passes centrally through a catalyst body (10) arranged in the housing (1) and the exhaust gas inlet chamber (22), which is arranged on the end face of the catalyst body (10) and is constructed in a reflective construction, via the catalyst body (10) with a downstream one arranged on its other end face Chamber (23) is connected. Abgasschalldämpfer nach Anspruch 1,
dadurch gekennzeichnet, daß die in Reflexionsbauweise ausgebildete nachgeschaltete Kammer (23) über eine zum Katalysatorkörper konzentrische Resonatorkammer (24) mit der Abgasausgangskammer (25) kommuniziert. Exhaust silencer according to claim 1,
characterized, that the downstream chamber (23) designed in a reflective design communicates with the exhaust gas outlet chamber (25) via a resonator chamber (24) concentric with the catalyst body. Abgasschalldämpfer nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Abgasausgangskammer (25) als den Katalysatorkörper (10) bzw. die Abgaseingangskammer (22) umfassende Ringkammer ausgebildet ist. Exhaust silencer according to claim 1 or 2,
characterized, that the exhaust gas outlet chamber (25) is designed as an annular chamber comprising the catalyst body (10) or the exhaust gas inlet chamber (22). Abgasschalldämpfer nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß die Abgasausgangskammer (25) in Reflexionsbauweise ausgebildet ist und die Abgasausgangsleitung (14) seitlich neben der Resonatorkammer (24) von der Abgasausgangskammer (25) abzweigt. Exhaust silencer according to claim 2 or 3,
characterized, that the exhaust gas outlet chamber (25) is designed in a reflective design and the exhaust gas outlet line (14) branches off to the side next to the resonator chamber (24) from the exhaust gas outlet chamber (25). Abgasschalldämpfer nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, daß die Abgasausgangskammer (25) über eine perforierte Wandung (5) mit einer Absorptionskammer (20) gekoppelt ist. Exhaust silencer according to one of claims 2 to 4,
characterized, that the exhaust gas outlet chamber (25) is coupled to an absorption chamber (20) via a perforated wall (5). Abgasschalldämpfer nach Anspruch 5,
dadurch gekennzeichnet, daß die Abgasausgangskammer (25) auf ihrer die Abgase reflektierenden, der Resonatorkammer (24) gegenüberliegenden Seite über die perforierte Wandung (5) mit der Absorptionskammer (20) verbunden ist. Exhaust silencer according to claim 5,
characterized, that the exhaust gas outlet chamber (25) on its side reflecting the exhaust gases, the resonator chamber (24) opposite side via the perforated wall (5) is connected to the absorption chamber (20). Abgasschalldämpfer nach Anspruch 5 oder 6,
dadurch gekennzeichnet, daß die Absorptionskammer (20) zwischen einer Gehäusestirnseite bzw. einem stirnseitigen Gehäuseboden (4) und einem vom Katalysatorkörper (10) beabstandeten Boden (9') der Abgaseingangskammer (22) angeordnet ist, derart, daß dieser Boden (9') durch Absorptionsmaterial hinterfüttert ist. Exhaust silencer according to claim 5 or 6,
characterized, that the absorption chamber (20) is arranged between a housing end face or a front housing bottom (4) and a bottom (9 ') of the exhaust gas inlet chamber (22) spaced apart from the catalyst body (10), in such a way that this bottom (9') backfills with absorption material is. Abgasschalldämpfer nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Abgasausgangsleitung (14) über eine zumindest bereichsweise perforierte Rohrwandung mit einer (weiteren) Absorptionskammer (21) kommuniziert. Exhaust silencer according to one of claims 1 to 7,
characterized, that the exhaust gas outlet line (14) communicates with an (additional) absorption chamber (21) via an at least partially perforated tube wall. Abgasschalldämpfer nach einem der Ansprüche 1 bis 8
dadurch gekennzeichnet, daß die Abgaseingangsleitung (12) die nachgeschaltete Kammer (23) durchsetzt. Exhaust silencer according to one of claims 1 to 8
characterized, that the exhaust gas inlet line (12) passes through the downstream chamber (23). Abgasschalldämpfer nach Anspruch 9,
dadurch gekennzeichnet, daß der die nachgeschaltete Kammer (23) durchsetzende Teil der Abgaseingangsleitung (12) gegenüber dem den Katalysatorkörper (10) durchsetzenden Teil der Abgaseingangsleitung (12) - vorzugsweise etwa rechtwinklig - abgewinkelt ist. Exhaust silencer according to claim 9,
characterized, that the part of the exhaust gas inlet line (12) passing through the downstream chamber (23) is angled, preferably at approximately a right angle, with respect to the part of the exhaust gas inlet line (12) passing through the catalyst body (10). Abgasschalldämpfer nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß die Abgaseingangsleitung (12) zwischen zwei stirnseitigen Gehäuseböden (3,4) einen Umfangsmantel (2) des Gehäuses (1) durchsetzt. Exhaust silencer according to one of claims 1 to 10,
characterized, that the exhaust gas inlet line (12) passes through a peripheral jacket (2) of the housing (1) between two front housing bottoms (3, 4). Abgasschalldämpfer nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, daß die Abgasausgangsleitung (14) innerhalb des Gehäuses (1) einen gewundenen Verlauf - vorzugsweise mit einer einen Bogen von etwa 270° beschreibenden Windung - aufweist. Exhaust silencer according to one of claims 1 to 11,
characterized, that the exhaust gas outlet line (14) has a tortuous course within the housing (1) - preferably with a turn describing an arc of approximately 270 °. Abgasschalldämpfer nach Anspruch 12,
dadurch gekennzeichnet, daß die Windung in einer zur Mittellängsachse des Katalysatorkörpers (10) parallelen Ebene liegt. Exhaust silencer according to claim 12,
characterized, that the turn lies in a plane parallel to the central longitudinal axis of the catalyst body (10). Abgasschalldämpfer nach Anspruch 12 oder 13,
dadurch gekennzeichnet, daß die Windung segmentiert aus Winkelstücken (16,18,19) und geraden Rohrstücken (15,17) aufgebaut ist. Exhaust silencer according to claim 12 or 13,
characterized, that the turn is segmented from elbows (16,18,19) and straight pipe sections (15,17) is constructed. Abgasschalldämpfer nach Anspruch 14,
dadurch gekennzeichnet, daß die Winkelstücke (16,18) zumindest teilweise jeweils aus zwei zueinander symmetrischen Halbschalen bestehen. Exhaust silencer according to claim 14,
characterized, that the angle pieces (16, 18) each consist at least partially of two mutually symmetrical half-shells. Abgasschalldämpfer nach einem der Ansprüche 12 bis 15,
dadurch gekennzeichnet, das die Abgasausgangsleitung (14) einen die weitere Absorptionskammer (21) durchsetzenden perforierten Windungsteil (15 bis 18) und eine die Abgasausgangskammer (24) durchsetzenden Windungsteil (19) mit geschlossener Wandung aufweist. Exhaust silencer according to one of claims 12 to 15,
characterized, that the exhaust gas outlet line (14) has a perforated winding part (15 to 18) passing through the further absorption chamber (21) and a winding part (19) with closed wall passing through the exhaust gas exit chamber (24). Abgasschalldämpfer nach Anspruch 16,
dadurch gekennzeichnet, daß der die geschlossene Wandung aufweisende Windungsteil (19) in Strömungsrichtung der Abgase hinter dem perforierten Windungsteil (15 bis 18) angeordnet ist. Exhaust silencer according to claim 16,
characterized, that the turn part (19) having the closed wall is arranged in the flow direction of the exhaust gases behind the perforated turn part (15 to 18). Abgasschalldämpfer nach einem der Ansprüche 12 bis 17,
dadurch gekennzeichnet, die Abgasausgangsleitung (14) zwischen zwei stirnseitigen Gehäuseböden (3,4) ein Umfangsmantel (2) des Gehäuses (1) durchsetzt. Exhaust silencer according to one of claims 12 to 17,
characterized, the exhaust gas outlet line (14) passes through a peripheral jacket (2) of the housing (1) between two front housing bottoms (3, 4). Abgasschalldämpfer nach einem der Ansprüche 8 bis 18,
dadurch gekennzeichnet, daß die weiteren Absorptionskammer (21) seitlich neben der nachgeschalteten Kammer (23) sowie der Resonatorkammer (24) im Gehäuse (1) angeordnet ist. Exhaust silencer according to one of claims 8 to 18,
characterized, that the further absorption chamber (21) is arranged laterally next to the downstream chamber (23) and the resonator chamber (24) in the housing (1). Abgasschalldämpfer nach einem der Ansprüche 1 bis 19,
dadurch gekennzeichnet, daß der Katalysatorkörper (10) in ein an seiner einen Stirnseite offenen Katalysatorgehäuse (9) angeordnet ist, dessen geschlossener Endbereich die Abgaseingangskammer (22) bildet. Exhaust silencer according to one of claims 1 to 19,
characterized, that the catalytic converter body (10) is arranged in a catalytic converter housing (9) which is open at one end face and whose closed end region forms the exhaust gas inlet chamber (22). Abgasschalldämpfer nach Anspruch 20,
dadurch gekennzeichnet, daß das Katalysatorgehäuse (9) in entsprechenden Öffnungen von perforierten Innenböden (5,6) gehaltert ist, die das Gehäuse (1) quer zur Achse des Katalysatorgehäuses (9) bzw. des Katalysatorkörpers (10) unterteilen und sich über den gesamten Gehäusequerschnitt erstrecken und zwischen denen die Abgasausgangskammer (25) angeordnet ist. Exhaust silencer according to claim 20,
characterized, that the catalyst housing (9) is held in corresponding openings by perforated inner floors (5, 6) which divide the housing (1) transversely to the axis of the catalyst housing (9) or the catalyst body (10) and extend over the entire housing cross section and between which the exhaust gas outlet chamber (25) is arranged. Abgasschalldämpfer nach einem der Ansprüche 12 bis 21,
dadurch gekennzeichnet, daß der in einem mittleren Bereich des Gehäuses (1) sowie des Katalysatorgehäuses (9) angeordnete eine Innenboden (6) von der gewundenen Abgasausgangsleitung (14) zweifach durchsetzt wird. Exhaust silencer according to one of claims 12 to 21,
characterized, that the inner floor (6) arranged in a central region of the housing (1) and the catalyst housing (9) is penetrated twice by the tortuous exhaust gas outlet line (14). Abgasschalldämpfer nach einem der Ansprüche 20 bis 22,
dadurch gekennzeichnet, daß ein nahe des geschlossenen Endes des Katalysatorgehäuses (9) angeordneter andere Innenboden (5) die eine Absorptionskammer (20) begrenzt. Exhaust silencer according to one of claims 20 to 22,
characterized, that a near the closed end of the catalyst housing (9) arranged other inner floor (5) delimits an absorption chamber (20). Abgasschalldämpfer nach einem der Ansprüche 20 bis 23,
dadurch gekennzeichnet, daß am offenen Ende des Katalysatorgehäuses (9) ein dritter perforierter Innenboden (7) angeordnet ist, der die Resonatorkammer (24), die gegenüber der Abgasausgangskammer (25) durch den im mittleren Gehäusebereich erstreckten Innenboden (6) abgegrenzt ist, gegenüber der nachgeschalteten Kammer (23) abgrenzt und mit einem Randbereich an eine die weitere Absorptionskammer (21) von der nachgeschalteten Kammer (23) sowie der Resonatorkammer (24) abtrennenden Wand (8) anstößt. Exhaust silencer according to one of claims 20 to 23,
characterized, that at the open end of the catalyst housing (9) a third perforated inner floor (7) is arranged, the resonator chamber (24), which is delimited from the exhaust gas outlet chamber (25) by the inner floor (6) extending in the central housing area, from the downstream chamber (23) and an edge area abuts a wall (8) separating the further absorption chamber (21) from the downstream chamber (23) and the resonator chamber (24). Abgasschalldämpfer nach einem der Ansprüche 1 bis 14,
dadurch gekennzeichnet, daß in der Abgasausgangsleitung (14) eine Venturidüse (26) angeordnet ist. Exhaust silencer according to one of claims 1 to 14,
characterized, that a venturi nozzle (26) is arranged in the exhaust gas outlet line (14). Abgasschalldämpfer nach einem der Ansprüche 20 bis 25,
dadurch gekennzeichnet, daß das Katalysatorgehäuse (9) innerhalb von Öffnungen in den vom Katalysatorgehäuse (9) durchsetzten Böden (5,6,7) mit diesen Böden verschweißt ist. Exhaust silencer according to one of claims 20 to 25,
characterized, that the catalyst housing (9) is welded to these floors within openings in the floors (5, 6, 7) penetrated by the catalyst housing (9). Abgasschalldämpfer nach einem der Ansprüche 8 bis 26,
dadurch gekennzeichnet, daß die weitere Absorptionskammer (21) durch eine Wand (8), die zwischen dem einen Gehäuseboden (1) und einem Innenboden (6) etwa senkrecht zu diesem Böden angeordnet ist, von der nachgeschalteten Kammer (23) und/oder der Resonatorkammer (24) abgetrennt ist. Exhaust silencer according to one of claims 8 to 26,
characterized, that the further absorption chamber (21) through a wall (8), which is arranged between the one housing base (1) and an inner base (6) approximately perpendicular to this base, from the downstream chamber (23) and / or the resonator chamber (24 ) is separated.
EP99100291A 1998-01-24 1999-01-09 Exhaust silencer for internal combustion engines Expired - Lifetime EP0931913B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19802624A DE19802624A1 (en) 1998-01-24 1998-01-24 Exhaust silencer for internal combustion engines
DE19802624 1998-01-24

Publications (2)

Publication Number Publication Date
EP0931913A1 true EP0931913A1 (en) 1999-07-28
EP0931913B1 EP0931913B1 (en) 2002-11-06

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Family Applications (1)

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EP99100291A Expired - Lifetime EP0931913B1 (en) 1998-01-24 1999-01-09 Exhaust silencer for internal combustion engines

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EP (1) EP0931913B1 (en)
AT (1) ATE227392T1 (en)
DE (2) DE19802624A1 (en)

Cited By (13)

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DE19955013A1 (en) * 1999-11-16 2001-05-17 Volkswagen Ag Unit for removing harmful pollutants from I.C. engine exhaust gas has catalyst section connected coaxially to partial section of exhaust gas channel
WO2001071169A1 (en) * 2000-03-21 2001-09-27 Silentor Holding A/S A silencer containing one or more porous bodies
EP1158144A2 (en) * 2000-05-24 2001-11-28 Fleetguard, Inc. Space efficient exhaust aftertreatment filter
EP1184543A2 (en) * 2000-08-30 2002-03-06 J. Eberspächer GmbH & Co. Exhaust purification system for motor vehicles, particularly Diesel utility vehicles
FR2877041A1 (en) * 2004-10-25 2006-04-28 Faurecia Sys Echappement EXHAUST GAS TREATMENT DEVICE FOR MOTOR VEHICLE AND CORRESPONDING VEHICLE
DE10202005B4 (en) * 2001-01-23 2009-12-17 SenerTec Kraft-Wärme-Energiesysteme GmbH filtering device
EP2143899A1 (en) * 2007-04-03 2010-01-13 Yanmar Co., Ltd. Black exhaust purification apparatus for diesel engine
EP2119885A4 (en) * 2007-02-23 2010-05-19 Hino Motors Ltd Exhaust gas purification device
WO2010142647A1 (en) * 2009-06-12 2010-12-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Exhaust gas treatment device for use near an engine
EP2453113A1 (en) * 2010-11-10 2012-05-16 Volvo Car Corporation Exhaust-gas aftertreatment device
WO2019194784A1 (en) * 2018-04-02 2019-10-10 Cummins Emission Solutions Inc. Aftertreatment system including noise reducing components
WO2020048878A1 (en) * 2018-09-04 2020-03-12 Vitesco Technologies GmbH Ring catalyst
US11486289B2 (en) 2018-07-03 2022-11-01 Cummins Emission Solutions Inc. Body mixing decomposition reactor

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EP1507071B2 (en) 2003-08-11 2019-10-16 Faurecia Emissions Control Technologies, Germany GmbH Exhaust silencer
DE10353594B4 (en) * 2003-11-17 2013-08-01 Friedrich Boysen Gmbh & Co. Kg silencer

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JPH05237397A (en) * 1992-02-25 1993-09-17 Yamaha Motor Co Ltd Catalyst converter
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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955013A1 (en) * 1999-11-16 2001-05-17 Volkswagen Ag Unit for removing harmful pollutants from I.C. engine exhaust gas has catalyst section connected coaxially to partial section of exhaust gas channel
DE19955013B4 (en) * 1999-11-16 2008-04-03 Volkswagen Ag Exhaust system of an internal combustion engine
WO2001071169A1 (en) * 2000-03-21 2001-09-27 Silentor Holding A/S A silencer containing one or more porous bodies
US7537083B2 (en) 2000-03-21 2009-05-26 Silentor Holdings A/S Silencer containing one or more porous bodies
US7104358B2 (en) 2000-03-21 2006-09-12 Silentor Holding A/S Silencer containing one or more porous bodies
US6824743B1 (en) 2000-05-24 2004-11-30 Fleet Guard, Inc. Space efficient exhaust aftertreatment filter
EP1158144A3 (en) * 2000-05-24 2003-10-08 Fleetguard, Inc. Space efficient exhaust aftertreatment filter
EP1158144A2 (en) * 2000-05-24 2001-11-28 Fleetguard, Inc. Space efficient exhaust aftertreatment filter
EP1184543A3 (en) * 2000-08-30 2004-01-07 J. Eberspächer GmbH & Co. KG Exhaust purification system for motor vehicles, particularly Diesel utility vehicles
EP1184543A2 (en) * 2000-08-30 2002-03-06 J. Eberspächer GmbH & Co. Exhaust purification system for motor vehicles, particularly Diesel utility vehicles
DE10202005B4 (en) * 2001-01-23 2009-12-17 SenerTec Kraft-Wärme-Energiesysteme GmbH filtering device
FR2877041A1 (en) * 2004-10-25 2006-04-28 Faurecia Sys Echappement EXHAUST GAS TREATMENT DEVICE FOR MOTOR VEHICLE AND CORRESPONDING VEHICLE
WO2006045940A1 (en) * 2004-10-25 2006-05-04 Faurecia Systemes D'echappement Device for treating exhaust gas for a motor vehicle, and corresponding vehicle
EP2119885A4 (en) * 2007-02-23 2010-05-19 Hino Motors Ltd Exhaust gas purification device
US8276372B2 (en) 2007-02-23 2012-10-02 Hino Motors, Ltd. Exhaust emission control device
EP2143899A4 (en) * 2007-04-03 2011-06-15 Yanmar Co Ltd Black exhaust purification apparatus for diesel engine
EP2143899A1 (en) * 2007-04-03 2010-01-13 Yanmar Co., Ltd. Black exhaust purification apparatus for diesel engine
US8327629B2 (en) 2007-04-03 2012-12-11 Yanmar Co., Ltd. Black exhaust purification apparatus for diesel engine
US8713920B2 (en) 2009-06-12 2014-05-06 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Exhaust gas treatment device for use near an engine and motor vehicle having the device
WO2010142647A1 (en) * 2009-06-12 2010-12-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Exhaust gas treatment device for use near an engine
US9341096B2 (en) 2009-06-12 2016-05-17 Emitec Gesellschaft Fuer Emissiontechnologie Mbh Exhaust gas treatment device for use near an engine and motor vehicle having the device
CN102465746B (en) * 2010-11-10 2016-04-20 沃尔沃汽车公司 For the exhaust aftertreatment device of internal-combustion engine
CN102465746A (en) * 2010-11-10 2012-05-23 沃尔沃汽车公司 Exhaust-gas aftertreatment device
EP2453113A1 (en) * 2010-11-10 2012-05-16 Volvo Car Corporation Exhaust-gas aftertreatment device
WO2019194784A1 (en) * 2018-04-02 2019-10-10 Cummins Emission Solutions Inc. Aftertreatment system including noise reducing components
GB2586752A (en) * 2018-04-02 2021-03-03 Cummins Emission Solutions Inc Aftertreatment system including noise reducing components
US11181027B2 (en) 2018-04-02 2021-11-23 Cummins Emission Solutions Inc. Aftertreatment system including noise reducing components
GB2586752B (en) * 2018-04-02 2022-07-27 Cummins Emission Solutions Inc Aftertreatment system including noise reducing components
US11486289B2 (en) 2018-07-03 2022-11-01 Cummins Emission Solutions Inc. Body mixing decomposition reactor
US11891937B2 (en) 2018-07-03 2024-02-06 Cummins Emission Solutions Inc. Body mixing decomposition reactor
WO2020048878A1 (en) * 2018-09-04 2020-03-12 Vitesco Technologies GmbH Ring catalyst

Also Published As

Publication number Publication date
ATE227392T1 (en) 2002-11-15
DE19802624A1 (en) 1999-07-29
EP0931913B1 (en) 2002-11-06
DE59903280D1 (en) 2002-12-12

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