EP0455623B1 - Silencieux, en particulier pour moteur 2-temps à catalyseur - Google Patents

Silencieux, en particulier pour moteur 2-temps à catalyseur Download PDF

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Publication number
EP0455623B1
EP0455623B1 EP91890080A EP91890080A EP0455623B1 EP 0455623 B1 EP0455623 B1 EP 0455623B1 EP 91890080 A EP91890080 A EP 91890080A EP 91890080 A EP91890080 A EP 91890080A EP 0455623 B1 EP0455623 B1 EP 0455623B1
Authority
EP
European Patent Office
Prior art keywords
wall
housing
exhaust silencer
exhaust
intermediate layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91890080A
Other languages
German (de)
English (en)
Other versions
EP0455623A1 (fr
Inventor
Christian Dipl. Ing. Beidl
Albin Sterbenz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0455623A1 publication Critical patent/EP0455623A1/fr
Application granted granted Critical
Publication of EP0455623B1 publication Critical patent/EP0455623B1/fr
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
    • 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
    • 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
    • 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 muffler, in particular for two-stroke internal combustion engines with a downstream catalytic converter, consisting of a housing provided with an inlet and outlet, divided into partitions by partitions with connecting pipes and flowed through in two or more directions, the outlet being perforated from one , there is an inner tube encased at a distance from an outer tube and the housing has a double wall with a heat-resistant intermediate layer.
  • the invention is therefore based on the object of eliminating these deficiencies and of creating an exhaust silencer of the type described at the outset which is distinguished by better damper properties and has a reduced surface temperature.
  • the invention solves this problem in that the a pipe resonator connects the perforated inner tube and the perforated resonator formed by the outer tube, the inner wall of the housing wall is corrugated and the structure-borne sound-absorbing intermediate layer braces the inner wall against the outer wall.
  • the two resonators forming the outlet compensate for the unfavorable, previously poorly damped frequencies.
  • the inner wall with the intermediate layer prevents sound radiation from the housing surface, the sound absorption being improved by the corrugation of the inner wall and an effective reduction in the surface sound radiation being achieved by the bracing.
  • too high surface temperatures of the housing are avoided by the intermediate layer if a catalytic converter is arranged upstream of the silencer.
  • the intermediate layer preferably consists of ceramic fibers with a swelling binder, the swelling of the inner wall against the outer wall of the housing being achieved by its swelling.
  • a cylindrical heat shield which is preferably attached to the subsequent partition wall and shields the double wall of the housing, is provided in the chamber into which the inlet opens.
  • the housing end wall directly impacted by the exhaust gases is preceded by a protective wall with a space unoccupied by the exhaust gases, which prevents the flame gases coming from the catalytic converter from penetrating through to the housing end wall and at the same time contributes to sound insulation.
  • a protective wall with a space unoccupied by the exhaust gases, which prevents the flame gases coming from the catalytic converter from penetrating through to the housing end wall and at the same time contributes to sound insulation.
  • the drawing shows an exemplary embodiment of an exhaust silencer according to the invention for a two-stroke internal combustion engine with a downstream catalyst in longitudinal section.
  • the muffler has a substantially cylindrical housing 1, which is provided at one end with an inlet 2 and at its other end with an outlet 3.
  • the muffler according to the invention is connected as a separate unit to the counter cone or the tail pipe of an exhaust system. Due to the high temperature level and the strong vibrations that occur, the use of absorbent material is not reliably possible.
  • the housing 1 is divided by rigid curved sheets 4 into three chambers I, II, III, the connecting tubes 5 breaking through the sheets 4 or dividing walls being arranged in such a way that the chambers flow through from the inlet 2 in the order I-III-II will. So in the chambers III and II there is a reversal of the direction of the gases flowing through.
  • the outlet 3 consists of a perforated resonator, which is formed by a perforated inner tube 6 and an outer tube 7 that surrounds it at a distance, and a subsequent pipe resonator 8.
  • the housing 1 has a double wall, the corrugated inner wall 9 of which is damped by structure-borne noise and is heat-resistant Intermediate layer 10 made of ceramic fibers is clamped against the outer wall with a swelling binder.
  • a cylindrical heat shield 11 is provided which is attached to the subsequent partition 4 and shields the double wall 9, 10 of the housing 1. Since the exhaust gases flow through at least one of the connecting pipes 5 directly into the chamber III and can impair the end wall 12 there, a protective wall 13 is arranged at a distance from the housing end wall 12.

Landscapes

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

Claims (3)

  1. Silencieux d'échappement, notamment pour moteurs à combustion interne à deux temps, complété d'un catalyseur en aval, composé d'un boîtier (1) muni d'une entrée et d'une sortie (2, 3), subdivisé en plusieurs chambres (I, II, III) par des cloisons (4) munies de tubes de liaison (5), et parcouru par le courant avec deux changements de direction, la sortie (3) étant formée d'un tube intérieur (6) perforé, entouré d'un tube extérieur (7) à un certain écartement, et le boîtier (1) présentant une double paroi avec couche intercalaire (10) résistante à la chaleur,
    caractérisé par le fait qu'au résonateur à trous formé du tube intérieur perforé (6) et du tube extérieur (7), fait suite à un résonateur à sifflet, que la paroi intérieure (9) de la paroi du boîtier est ondulée et que la couche intercalaire (10) qui amortit les bruits transmis par condcution dans les solides réunit la paroi intérieure (9) à la paroi extérieure par une liaison bloquée .
  2. Silencieux d'échappement selon la revendications 1,
    caractérisé par le fait que, dans la chambre (1) dans laquelle l'entrée (2) débouche, est prévu un bouclier thermique (11) de forme cylindrique, fixé de préférence à la cloison (4) qui le suit et qui forme écran pour protéger la double paroi (9, 10) du boîtier (1).
  3. Silencieux d'échappement selon la revendication 1 ou 2,
    caractérisé par le fait qu'une paroi protectrice (13) est placée en amont de la paroi frontale (12) côté sortie du boîtier, avec interposition d'un espace intercalaire dans lequel les gaz d'échappement ne pénètrent pas.
EP91890080A 1990-04-30 1991-04-17 Silencieux, en particulier pour moteur 2-temps à catalyseur Expired - Lifetime EP0455623B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT98590 1990-04-30
AT985/90 1990-04-30

Publications (2)

Publication Number Publication Date
EP0455623A1 EP0455623A1 (fr) 1991-11-06
EP0455623B1 true EP0455623B1 (fr) 1993-03-31

Family

ID=3504300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890080A Expired - Lifetime EP0455623B1 (fr) 1990-04-30 1991-04-17 Silencieux, en particulier pour moteur 2-temps à catalyseur

Country Status (5)

Country Link
US (1) US5168132A (fr)
EP (1) EP0455623B1 (fr)
JP (1) JPH04228817A (fr)
DE (1) DE59100068D1 (fr)
ES (1) ES2040152T3 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625172A (en) * 1995-04-18 1997-04-29 Caterpillar Inc. Engine enclosure air inlet/discharge sound attenuator
US5952625A (en) * 1998-01-20 1999-09-14 Jb Design, Inc. Multi-fold side branch muffler
JP2962706B1 (ja) * 1998-05-26 1999-10-12 株式会社三五 消音器
DE10107040A1 (de) * 2001-02-17 2002-08-29 Zeuna Staerker Kg Kraftfahrzeug-Schalldämpfer
JP3953761B2 (ja) * 2001-09-05 2007-08-08 本田技研工業株式会社 小型艇の排気装置の排気構造
US6595319B1 (en) 2001-10-30 2003-07-22 Ronald G. Huff Muffler
US6913112B2 (en) * 2003-02-05 2005-07-05 Arvin Technologies, Inc. Noise attenuation assembly
US7273129B2 (en) * 2003-09-05 2007-09-25 Faurecia Exhaust Systems, Inc. Muffler with internal heat shield
US7156202B2 (en) * 2004-04-05 2007-01-02 Mtd Products Inc Method and apparatus for venting exhaust gas from an engine
US8191676B2 (en) 2010-11-04 2012-06-05 Ford Global Technologies, Llc Resonator for a dual-flow exhaust system
US20130048416A1 (en) * 2011-08-31 2013-02-28 Caterpillar Inc. Exhaust muffler
JP6162407B2 (ja) * 2013-01-11 2017-07-12 フタバ産業株式会社 消音器
EP2846010B1 (fr) * 2013-09-09 2019-06-19 Bosal Emission Control Systems NV Silencieux à utiliser dans le système d'échappement d'un véhicule
US9388718B2 (en) * 2014-03-27 2016-07-12 Ge Oil & Gas Compression Systems, Llc System and method for tuned exhaust
JP2016044626A (ja) * 2014-08-25 2016-04-04 トヨタ自動車株式会社 マフラ装置およびマフラ装置の製造方法
DE102014217058A1 (de) * 2014-08-27 2016-03-03 Eberspächer Exhaust Technology GmbH & Co. KG Schalldämpfer
DE102018124198A1 (de) 2017-10-05 2019-04-11 Tenneco Automotive Operating Company Inc. Akustisch abgestimmter Schalldämpfer
US11365658B2 (en) 2017-10-05 2022-06-21 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
US11199116B2 (en) 2017-12-13 2021-12-14 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
RU185956U1 (ru) * 2018-07-04 2018-12-25 Общество с ограниченной ответственностью "Газпром проектирование" Устройство для глушения шума сброса газа в атмосферу
US11268429B2 (en) 2019-01-17 2022-03-08 Tenneco Automotive Operating Company Inc. Diffusion surface alloyed metal exhaust component with inwardly turned edges
US11268430B2 (en) 2019-01-17 2022-03-08 Tenneco Automotive Operating Company Inc. Diffusion surface alloyed metal exhaust component with welded edges
DE102019132097A1 (de) * 2019-11-27 2021-05-27 Eberspächer Exhaust Technology GmbH Abgasschalldämpfer
CN115956162A (zh) * 2021-04-06 2023-04-11 深圳元戎启行科技有限公司 消音装置、应用于自动驾驶的消音装置以及自动驾驶装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113828A (en) * 1936-05-18 1938-04-12 Robert W Compo Muffler
US2841237A (en) * 1953-12-14 1958-07-01 Slayter Games Muffler structure
US2922485A (en) * 1955-09-19 1960-01-26 Gen Motors Corp Muffler
DE1476629A1 (de) * 1963-03-22 1969-07-10 Walker Manufact Company Abgas- und Schalldaempfungs-System fuer Kraftfahrzeuge u.dgl.
US3289786A (en) * 1965-05-17 1966-12-06 Walker Mfg Co Muffler with return bend tuning passage
US3581842A (en) * 1969-01-31 1971-06-01 Oldberg Mfg Co Exhaust muffler and method of and adapter means for mounting same
US4137993A (en) * 1977-09-21 1979-02-06 Tenneco, Inc. Insulated exhaust system component
DE2908506C2 (de) * 1979-03-05 1985-01-31 Roth Technik GmbH, 7560 Gaggenau Schalldämpfer für Verbrennungskraftmaschinen
WO1984002954A1 (fr) * 1983-01-20 1984-08-02 Honda Motor Co Ltd Appareil d'isolation thermique et sonore

Also Published As

Publication number Publication date
DE59100068D1 (de) 1993-05-06
ES2040152T3 (es) 1993-10-01
US5168132A (en) 1992-12-01
EP0455623A1 (fr) 1991-11-06
JPH04228817A (ja) 1992-08-18

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