EP0057623B1 - Silencieux de gaz d'échappement de moteur thermique - Google Patents

Silencieux de gaz d'échappement de moteur thermique Download PDF

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Publication number
EP0057623B1
EP0057623B1 EP82400070A EP82400070A EP0057623B1 EP 0057623 B1 EP0057623 B1 EP 0057623B1 EP 82400070 A EP82400070 A EP 82400070A EP 82400070 A EP82400070 A EP 82400070A EP 0057623 B1 EP0057623 B1 EP 0057623B1
Authority
EP
European Patent Office
Prior art keywords
tubes
boss
cup
silencer
exhaust gas
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
Application number
EP82400070A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0057623A3 (en
EP0057623A2 (fr
Inventor
Jean-Pierre Buchwalder
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.)
Peugeot Cycles SA
Original Assignee
Peugeot Cycles SA
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 Peugeot Cycles SA filed Critical Peugeot Cycles SA
Priority to AT82400070T priority Critical patent/ATE20953T1/de
Publication of EP0057623A2 publication Critical patent/EP0057623A2/fr
Publication of EP0057623A3 publication Critical patent/EP0057623A3/fr
Application granted granted Critical
Publication of EP0057623B1 publication Critical patent/EP0057623B1/fr
Expired 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
    • F01N1/08—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

Definitions

  • the main function of the exhaust mufflers of combustion engines is to minimize the noise generated by the exhaust gas. However, they must avoid too much braking of the flow of these gases because the power of the engine would be reduced, but moreover they must have the smallest possible volume because the space available for their mounting is small, especially when it 'acts of exhaust silencer of motor vehicle.
  • silencers generally comprise a cylindrical casing, which is closed by end cups crimped onto it, and in which tubes, supported by internal cups and communicating with each other in end chambers adjacent to the cups closing, guide the gas in a zigzag path.
  • the envelopes of these silencers can have a circular, oval or other cross section, depending on the space available under the body for example, but in all cases each end chamber connecting the successive tubes must have a relatively large volume to avoid braking. of the gas flow, so that the size of the silencer is still often troublesome.
  • end cups non-planar cups and in particular cups provided with bosses, projecting outwards, as shown in US-A-3,710,892 and US-A- 3,741,336, in order to increase their rigidity and avoid unwanted resonances.
  • bosses projecting outwards, as shown in US-A-3,710,892 and US-A- 3,741,336, in order to increase their rigidity and avoid unwanted resonances.
  • the projection of such bosses is as small as possible, it enlarges the end chamber and further increases the bulk of the device.
  • the object of the present invention is to remedy this drawback by providing an exhaust gas silencer in which the volume of the end chamber is reduced without causing the flow of gas to be reduced and even by reducing this braking.
  • the subject of this invention is in fact a silencer of exhaust gases from a heat engine comprising an external cylindrical envelope and gas guide tubes, connected to each other by at least one delimited extreme chamber, inside the envelope, by a flat intermediate cup for supporting the tubes and an end cup, comprising, in line with two successive tubes, a rounded and hollow boss, projecting outwards, characterized in that the top of the boss is repaired from the flat part of the cup by a distance slightly greater than the radius of the tubes, that the base of the boss has a small dimension, which is slightly greater than the diameter of one of the tubes, while its large dimension corresponds substantially to the distance between the two generatrices the most distant from the two successive tubes, while the thickness of the chamber, around the boss, is less than the diameter of the tubes, so that the boss guides the change of say ction of the flow of ga 2 between these tubes.
  • the rounded boss thus forms a flow guide wall, the direction of which is gradually reversed, which reduces the formation of turbulence and pressure losses.
  • the distance between the cup itself, that is to say its flat part, and the end of the tubes can be relatively small, which makes it possible to reduce the length of the cylindrical envelope and, as a result, the total size of the silencer.
  • the muffler thus represented comprises a casing 1, of cylindrical shape, closed at each of its ends by a cup, respectively 2, 4.
  • the cup 2 is traversed by an exhaust gas inlet tube 6, while the cup 4 is crossed by an outlet tube for these gases into the atmosphere.
  • the open end of the gas inlet tube 6 is fixed in an interior cup 10, which delimits with the corresponding end cup 4 a chamber 12.
  • the open end of the outlet tube 8 is fixed in an internal cup 14, which defines with the corresponding end cup 2 a gas chamber 16.
  • a third tube 18 connects the: chambers 12 and 16. so that the incoming gas p: tube 6 travels in a zigzag path forcing it to change direction twice avar to exit through the tube 8.
  • the end cup 2 which supports the inlet tube 6, is constituted by a planar element provided with a peripheral rim 28 directed towards the outside and having a length sufficient to be folded down and fixed by crimping on the extreme edge of the envelope 1. Furthermore, the cup 2 has a rounded boss 22, projecting outwards, which, as shown more clearly in FIG. 2, has a substantially elliptical base.
  • the large dimension of this base corresponds substantially to the sum of the two orifices provided in the cup 14 for fixing the tubes 18 and 8, and of the portion of cup which separates them, that is to say at the distance which separates the two generators furthest from the tubes 18 and 8.
  • the small dimension of this boss 22 is slightly larger than the diameter of one of the tubes 18 or 8.
  • the boss 22 is obtained by stamping the cup 2 outwards, so that its wall is gradually curved and forms a surface for guiding and deflecting the flow of gas between the tubes 18 and 8.
  • the cylindrical envelope 1 having an oval base
  • the tubes 6, 18 and 8 are aligned on the major axis of this oval. Consequently, the cup 2, which also has an oval shape, has a hole for the passage of the tube 6 which is aligned with the large dimension of the boss 22.
  • the cup 4 is produced in the same way as the cup 2 and, like it, has a rounded boss 24 projecting outwards, as well as a passage orifice for the tube 8 aligned with the large dimension of the boss 24.
  • this end cup is fixed to the casing 1, at a relatively small axial distance from the intermediate cup 10, 14, so that the chamber 12, 16 has, around the boss 22, an axial dimension which is less than the diameter of the tube 6, 18 or 8 , while at the right of the top of the boss its dimension corresponds to that of a classic extreme chamber.
  • the exhaust gases entering through the tube 6 change direction, on the one hand in the chamber 12 between the ends of the tubes 6 and 18 and the wall of the boss 24, and on the other hand in the chamber 16 between the ends of the tubes 18 and 8 and the wall of the boss 22.
  • the shape of the bosses 22 and 24 is such that these portions of the chambers 12 and 16 practically form a continuation of the tubes 6 or 18 in which, thanks to the absence of any guide wall between the tubes and the boss, the direction of the gases is changed without sudden encounter of these with the wall and with minimal braking. Consequently, it can be seen that it is no longer necessary to give the chambers 12 and 16 a large volume and that the cups 2 and 4 can be mounted much closer to the interior cups 10 and 14 than in conventional silencers. For example, the cups 2 and 4 can be brought closer to a distance corresponding to the depth of the boss 22 or 24 and thus retain sufficient volume to, in cooperation with the particular shape of the boss, prevent braking of the fluid by facilitating its flow.
  • cups according to the invention can be used on silencers of various types, for example on silencers such as that shown in FIG. 3, the outer envelope 21 of which is a cylinder with a circular base.
  • the three tubes 6, 18 and 8 are no longer aligned and each of the end cups 26 has a boss 28, of a shape similar to the boss 22 or 24, and a hole for passage of the inlet tube 6, or outlet 8, formed on the side of this boss, and preferably centered on the median axis corresponding to its smallest dimension.
  • FIG. 4 shows a silencer which comprises only two tubes, a gas inlet tube 30 and a gas outlet tube 32, both fixed in the same flat end cup 34. These two tubes cross the length of the cylindrical casing 31 and open into a chamber closed by an end cup 36.
  • This cup 36 has a boss 38 for guiding and reversing the flow of gas, which projects outside the silencer and the base of which corresponds substantially to the assembly of the two end orifices of the tubes. It is obvious that if the muffler were to have more than three tubes, at least one of the end cups could have several similar bosses, each guiding the flow of fluid between two successive tubes.
  • the silencer obtained has a smaller footprint than that of a conventional silencer and, moreover, provides significantly better noise attenuation.
  • Such a type of muffler is therefore particularly suitable for reducing the noise generated by the exhaust gases from motor vehicles, in which the space available under the bodywork is generally extremely reduced, but also in many other applications due especially its high efficiency and low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP82400070A 1981-02-02 1982-01-15 Silencieux de gaz d'échappement de moteur thermique Expired EP0057623B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400070T ATE20953T1 (de) 1981-02-02 1982-01-15 Abgassschalldaempfer einer waermekraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8101940A FR2499151B1 (fr) 1981-02-02 1981-02-02 Coupelle de fermeture pour silencieux d'echappement automobile et silencieux comportant une telle coupelle
FR8101940 1981-02-02

Publications (3)

Publication Number Publication Date
EP0057623A2 EP0057623A2 (fr) 1982-08-11
EP0057623A3 EP0057623A3 (en) 1982-08-25
EP0057623B1 true EP0057623B1 (fr) 1986-07-23

Family

ID=9254727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400070A Expired EP0057623B1 (fr) 1981-02-02 1982-01-15 Silencieux de gaz d'échappement de moteur thermique

Country Status (7)

Country Link
US (1) US4381045A (ja)
EP (1) EP0057623B1 (ja)
JP (1) JPS57148015A (ja)
AT (1) ATE20953T1 (ja)
DE (1) DE3272058D1 (ja)
ES (1) ES263609Y (ja)
FR (1) FR2499151B1 (ja)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673058A (en) * 1986-05-09 1987-06-16 G Enterprises Limited High performance automotive muffler
US4735283A (en) * 1986-12-04 1988-04-05 Tenneco Inc. Muffler with flow director plates
US4953660A (en) * 1989-02-09 1990-09-04 Tennessee Gas Pipeline Company Muffler with two part housing and flow tubes
AT405543B (de) * 1992-08-24 1999-09-27 Efg Turbinen Und Kraftwerksanl Druckreduzierventil
US5388408A (en) * 1993-10-01 1995-02-14 Lawrence-Keech Inc. Exhaust system for internal combustion engines
US6052990A (en) * 1998-06-25 2000-04-25 Competition Cams, Inc. Exhaust pipe and method and system for enhancing engine performance
US6076632A (en) * 1998-12-14 2000-06-20 Nelson Industries, Inc. Cross flow baffle muffler
FR2801341B1 (fr) * 1999-11-22 2002-02-15 Peugeot Citroen Automobiles Sa Echangeur de chaleur pour le refroidissement de gaz d'echappement d'un vehicule automobile
JP3943818B2 (ja) * 2000-09-21 2007-07-11 本田技研工業株式会社 エンジンの消音器
US6435302B1 (en) * 2000-12-21 2002-08-20 Shun-Lai Chen Motor vehicle muffler
TW538817U (en) * 2002-09-25 2003-06-21 Ind Tech Res Inst Reactor for producing ultra fine particles
ITTO20040041U1 (it) * 2004-03-26 2004-06-26 Supersprint Srl Silenziatore per gruppi di scarico di veicoli a motore termico
JP4545660B2 (ja) * 2005-09-02 2010-09-15 カルソニックカンセイ株式会社 消音器構造
US20070125594A1 (en) * 2005-12-01 2007-06-07 Hill William E Muffler assembly with sound absorbing member
JP4731523B2 (ja) * 2007-06-08 2011-07-27 株式会社ヒロテック 自動車エンジンの排気系継手構造
US20090000863A1 (en) * 2007-06-28 2009-01-01 Share Win Industry Co., Ltd. Exhaust pipe
DE102007062663A1 (de) * 2007-12-24 2009-06-25 J. Eberspächer GmbH & Co. KG Schiebesitz sowie Rohranordnung und Abgasbehandlungseinrichtung
KR20140066508A (ko) * 2012-11-23 2014-06-02 현대자동차주식회사 차량용 머플러
KR101526753B1 (ko) * 2013-12-19 2015-06-05 현대자동차주식회사 차량용 소음기
CA2940577A1 (en) * 2014-02-25 2015-09-03 Bombardier Recreational Products Inc. Muffler for an exhaust system of an internal combustion engine
JP6237472B2 (ja) * 2014-05-28 2017-11-29 スズキ株式会社 車両の排気管構造
US10196947B2 (en) * 2016-02-02 2019-02-05 Kohler Co. Muffler
CN108412592A (zh) * 2018-02-28 2018-08-17 北京汽车股份有限公司 用于车辆的尾气净化装置和车辆

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1514441A (en) * 1923-10-25 1924-11-04 Arthur J Culp Exhaust trap
US3441105A (en) * 1966-07-18 1969-04-29 Walker Mfg Co Muffler with diagonal tube ends
US3513939A (en) * 1967-12-06 1970-05-26 Walker Mfg Co Exhaust gas muffler
US3608667A (en) * 1969-05-09 1971-09-28 Tenneco Inc Muffler tube and bushing connection
US3682270A (en) * 1970-12-15 1972-08-08 Tenneco Inc Compact muffler
US3710892A (en) * 1971-04-29 1973-01-16 Tenneco Inc Transverse tuning tube
US3741336A (en) * 1971-06-10 1973-06-26 Tenneco Inc Expansion type silencer
CA1036025A (en) * 1974-02-15 1978-08-08 Wayne M. Wagner Acoustical energy attenuation apparatus
JPS50147016U (ja) * 1974-05-23 1975-12-05
US4192401A (en) * 1976-07-26 1980-03-11 Tenneco Inc. Complete louver flow muffler
US4109755A (en) * 1976-10-04 1978-08-29 Tenneco, Inc. Noise attenuator
US4192402A (en) * 1977-05-27 1980-03-11 Honda Giken Kogyo Kabushiki Kaisha Muffler for internal combustion engines
JPS53147143A (en) * 1977-05-27 1978-12-21 Honda Motor Co Ltd Muffler for internal combustion engine
JPS5431247U (ja) * 1977-08-04 1979-03-01

Also Published As

Publication number Publication date
EP0057623A3 (en) 1982-08-25
EP0057623A2 (fr) 1982-08-11
FR2499151B1 (fr) 1985-12-13
ATE20953T1 (de) 1986-08-15
FR2499151A1 (fr) 1982-08-06
DE3272058D1 (en) 1986-08-28
JPS57148015A (en) 1982-09-13
ES263609U (es) 1982-11-01
ES263609Y (es) 1983-06-01
US4381045A (en) 1983-04-26

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