EP0298379A1 - Silencieux pour gaz d'échappement - Google Patents

Silencieux pour gaz d'échappement Download PDF

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Publication number
EP0298379A1
EP0298379A1 EP88110513A EP88110513A EP0298379A1 EP 0298379 A1 EP0298379 A1 EP 0298379A1 EP 88110513 A EP88110513 A EP 88110513A EP 88110513 A EP88110513 A EP 88110513A EP 0298379 A1 EP0298379 A1 EP 0298379A1
Authority
EP
European Patent Office
Prior art keywords
exhaust silencer
housing
outlet pipe
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.)
Withdrawn
Application number
EP88110513A
Other languages
German (de)
English (en)
Inventor
Peter Dipl.-Ing. Krause
Edgar Dipl.-Ing. Neubert (Fh)
Manfred Doll
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.)
PAUL GILLET GmbH
Gillet Paul GmbH
Original Assignee
PAUL GILLET GmbH
Gillet Paul 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 PAUL GILLET GmbH, Gillet Paul GmbH filed Critical PAUL GILLET GmbH
Publication of EP0298379A1 publication Critical patent/EP0298379A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with 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
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/10—Tubes having non-circular cross section
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus

Definitions

  • the invention relates to an exhaust gas silencer, in particular for internal combustion engines in motor vehicles according to the preamble of claim 1.
  • Exhaust silencers of this type are known, for example, from DE-B-32 41 887, DE-A-35 29 010, GB-B-986 576 or GB-B-415 446.
  • Exhaust silencers usually have a closed housing, usually with an oval or round cross-section, which is often divided into chambers by partitions. A standard version is the division into three chambers.
  • the exhaust gases are introduced into the muffler housing via an inlet pipe and led out of the muffler via an outlet pipe. If necessary, both pipes penetrate the partition walls.
  • Every exhaust silencer is to reduce the acoustic energy in the exhaust gases as effectively as possible without excessively braking the exhaust gas flow.
  • the physical phenomena of absorption and reflection are used for this purpose.
  • absorption the pipes carrying the exhaust gases are surrounded by chambers which are filled with absorption material, usually rock or basalt wool, and these are coupled with the help suitable perforations in the pipe walls acoustically. This results in a damping of the high frequencies and thus an improvement in the subjective acoustic impression.
  • absorption the pipes carrying the exhaust gases are surrounded by chambers which are filled with absorption material, usually rock or basalt wool, and these are coupled with the help suitable perforations in the pipe walls acoustically. This results in a damping of the high frequencies and thus an improvement in the subjective acoustic impression.
  • reflection sudden changes in the cross-section of the pipes and chambers are provided in the exhaust gas flow, or suitable resonance spaces are acoustically coupled with the aid of the perforations in the pipes. These per
  • the shape of the muffler housing and the shape of the gas-carrying pipes have an influence on the achievable sound absorption.
  • housings with an oval cross-section have a relatively larger surface area than those with a circular cross-section.
  • the surface is also less rigid due to the lower curvature in sections.
  • Such housings therefore emit more surface noise.
  • Similar conditions also apply to the exhaust pipes. If pipes with a small diameter are used, the sound-emitting surface is reduced. If the pipe diameter is made too small, however, the exhaust gas flow becomes too fast and the coupling to the absorption or reflection spaces deteriorates.
  • the arrangement of the exhaust pipes in the housing has a significant influence on the achievable sound absorption due to the reflection of the sound energy on the inner wall of the housing.
  • the present invention is therefore based on the object of specifying an exhaust muffler of the type mentioned, which requires only a few parts and is therefore light and inexpensive, and which also has simple production methods can be produced.
  • the inlet pipe and / or outlet pipe can be surrounded by a special absorption chamber, which is then covered with absorption material, e.g. B. rock or basalt wool is filled.
  • absorption material e.g. B. rock or basalt wool
  • the inner end of the outlet pipe is lowered to the bottom of the housing.
  • the condensate is created a path between the various chambers so that it can collect under the effect of the exhaust gas pressure in the chamber in which the outlet pipe opens.
  • housing 1 shows a housing 1, usually with a round or oval cross section, of an exhaust silencer.
  • the interior of the housing 1 is divided into three chambers 3, 4, 5 by means of two partition walls 2, which are perforated here. These chambers 3, 4, 5 act as reflection or resonance spaces.
  • an inlet pipe 6 is provided which penetrates the end wall of the housing 1 and both partition walls 2 and whose end 7 is closed in this exemplary embodiment, i. H. is squeezed. Perforations 8, 9 allow the exhaust gases to enter the housing 1 of the exhaust silencer and acoustically couple the chambers 4, 5 to the inlet pipe 6.
  • an outlet pipe 10 is provided, which likewise penetrates an end wall of the housing 1 and both partition walls 2.
  • the inner end 11 of the outlet pipe 10 is open in this embodiment.
  • it is lowered to the bottom of the housing 1 so that the condensate collecting there - the chamber 3 has the lowest exhaust gas back pressure - can be expelled with the exhaust gas flow.
  • Perforations 12 in the outlet pipe 10 acoustically couple the middle chamber 4 to the outlet pipe 10 or the exhaust gas flow.
  • An absorption chamber 14 is filled around the outlet pipe 10, which is filled with absorption material 15.
  • the acoustic coupling of the absorption chamber 15 to the outlet pipe 10 takes place with the aid of longitudinal slots 13 in the pipe wall. These longitudinal slots have the advantage that, even if the absorption material 15 is blown out over time, no whistling noises occur.
  • Inlet tube 6 and outlet tube 10 are partially provided with longitudinal beads 16, 17 and 18, 19, the more precise shape and size of which can be seen in FIG. 2.
  • These longitudinal beads 16 ... 19 initially reduce the cross-section of the pipes 6, 10.
  • the effect of these longitudinal beads on the reduction of the sound energy in the exhaust gases is greater than in the case of cross-sectional jumps of the same magnitude which were made according to the prior art, even though the sound emitting
  • the surface of the pipes 6, 10 is larger than in the case of undeformed pipes with the same exhaust gas-carrying cross-section and although in the area of the longitudinal beads 16 ... 19 the speed of the exhaust gases is accelerated and the coupling through the perforations 8, 9, 12, 13 is thereby deteriorated.
  • inlet pipe and outlet pipe 10 are equipped with identical longitudinal beads 16, 17 and 19, 18, so that both pipes 6, 10 can be manufactured with the same tool.
EP88110513A 1987-07-10 1988-07-01 Silencieux pour gaz d'échappement Withdrawn EP0298379A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8709527U DE8709527U1 (fr) 1987-07-10 1987-07-10
DE8709527U 1987-07-10

Publications (1)

Publication Number Publication Date
EP0298379A1 true EP0298379A1 (fr) 1989-01-11

Family

ID=6809942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110513A Withdrawn EP0298379A1 (fr) 1987-07-10 1988-07-01 Silencieux pour gaz d'échappement

Country Status (2)

Country Link
EP (1) EP0298379A1 (fr)
DE (1) DE8709527U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2643677A1 (fr) * 1989-02-24 1990-08-31 Gilardini Spa Silencieux pour un systeme d'echappement d'un vehicule
EP0625632A1 (fr) * 1993-05-18 1994-11-23 Roth-Technik Gmbh Silencieux de gaz d'échappement
US7004283B2 (en) * 2000-04-14 2006-02-28 J. Eberspächer GmbH & Co. KG Multiple-chambered exhaust muffler
JP2016186294A (ja) * 2015-03-27 2016-10-27 株式会社クボタ エンジンの排気処理装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8709527U1 (fr) * 1987-07-10 1987-10-15 Paul Gillet Gmbh, 6732 Edenkoben, De

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701397A (en) * 1925-09-16 1929-02-05 Gen Motors Corp Muffler
US2084435A (en) * 1936-02-03 1937-06-22 Oldberg Mfg Co Condensate eliminating means for silencers
US2138477A (en) * 1937-10-15 1938-11-29 Noblitt Sparks Ind Inc Muffler
US3263772A (en) * 1964-06-17 1966-08-02 Arvin Ind Inc Sound attenuating gas conduit with one-quarter wave-length side branch chambers
US3276108A (en) * 1964-02-21 1966-10-04 Reynolds Metals Co Method of making a muffler
DE1251082B (de) * 1967-09-28 Fa J Eberspacher, Eßlmgen/ Neckar Gasleitendes Rohr von Schalldampfern
FR2363696A1 (fr) * 1976-08-31 1978-03-31 Nihon Radiator Co Perfectionnements a un pot d'echappement
DE3012876A1 (de) * 1980-04-02 1981-10-08 Fa. J. Eberspächer, 7300 Esslingen Abgasschalldaempfer
US4371053A (en) * 1980-03-17 1983-02-01 Hills Industrie Limited Perforate tube muffler
EP0168365A1 (fr) * 1984-06-27 1986-01-15 Donaldson Company, Inc. Dispositif d'amortissement du bruit
US4580657A (en) * 1983-06-16 1986-04-08 Donaldson Company, Inc. Integral fluted tube for sound suppression and exhaust ejection
US4589517A (en) * 1983-11-30 1986-05-20 Saikei Giken Kogyo Kabushiki Kaisha Muffler
DE8709527U1 (fr) * 1987-07-10 1987-10-15 Paul Gillet Gmbh, 6732 Edenkoben, De

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1251082B (de) * 1967-09-28 Fa J Eberspacher, Eßlmgen/ Neckar Gasleitendes Rohr von Schalldampfern
US1701397A (en) * 1925-09-16 1929-02-05 Gen Motors Corp Muffler
US2084435A (en) * 1936-02-03 1937-06-22 Oldberg Mfg Co Condensate eliminating means for silencers
US2138477A (en) * 1937-10-15 1938-11-29 Noblitt Sparks Ind Inc Muffler
US3276108A (en) * 1964-02-21 1966-10-04 Reynolds Metals Co Method of making a muffler
US3263772A (en) * 1964-06-17 1966-08-02 Arvin Ind Inc Sound attenuating gas conduit with one-quarter wave-length side branch chambers
FR2363696A1 (fr) * 1976-08-31 1978-03-31 Nihon Radiator Co Perfectionnements a un pot d'echappement
US4371053A (en) * 1980-03-17 1983-02-01 Hills Industrie Limited Perforate tube muffler
DE3012876A1 (de) * 1980-04-02 1981-10-08 Fa. J. Eberspächer, 7300 Esslingen Abgasschalldaempfer
US4580657A (en) * 1983-06-16 1986-04-08 Donaldson Company, Inc. Integral fluted tube for sound suppression and exhaust ejection
US4589517A (en) * 1983-11-30 1986-05-20 Saikei Giken Kogyo Kabushiki Kaisha Muffler
EP0168365A1 (fr) * 1984-06-27 1986-01-15 Donaldson Company, Inc. Dispositif d'amortissement du bruit
DE8709527U1 (fr) * 1987-07-10 1987-10-15 Paul Gillet Gmbh, 6732 Edenkoben, De

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2643677A1 (fr) * 1989-02-24 1990-08-31 Gilardini Spa Silencieux pour un systeme d'echappement d'un vehicule
EP0625632A1 (fr) * 1993-05-18 1994-11-23 Roth-Technik Gmbh Silencieux de gaz d'échappement
US7004283B2 (en) * 2000-04-14 2006-02-28 J. Eberspächer GmbH & Co. KG Multiple-chambered exhaust muffler
JP2016186294A (ja) * 2015-03-27 2016-10-27 株式会社クボタ エンジンの排気処理装置

Also Published As

Publication number Publication date
DE8709527U1 (fr) 1987-10-15

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