EP0077230B1 - Einrichtung zur Gasströmungsmodulation im Abgasschalldämpfer von Brennkraftmaschinen - Google Patents

Einrichtung zur Gasströmungsmodulation im Abgasschalldämpfer von Brennkraftmaschinen Download PDF

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Publication number
EP0077230B1
EP0077230B1 EP82401704A EP82401704A EP0077230B1 EP 0077230 B1 EP0077230 B1 EP 0077230B1 EP 82401704 A EP82401704 A EP 82401704A EP 82401704 A EP82401704 A EP 82401704A EP 0077230 B1 EP0077230 B1 EP 0077230B1
Authority
EP
European Patent Office
Prior art keywords
resonator
tube
orifice
valve member
muffler
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
EP82401704A
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English (en)
French (fr)
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EP0077230A1 (de
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
Publication of EP0077230A1 publication Critical patent/EP0077230A1/de
Application granted granted Critical
Publication of EP0077230B1 publication Critical patent/EP0077230B1/de
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
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/161—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers
    • F01N1/163—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers by means of valves
    • 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
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
    • 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 object of the present invention is to remedy these drawbacks by making it possible to modify the acoustic diagram of the silencer as a function of the engine speed.
  • This invention indeed relates to a device for modulating the gas flow inside an exhaust silencer comprising, in a closed envelope, at least two perforated tubes traversed in series by the exhaust gas and an open resonator, which comprises in the resonator an orifice provided with a valve for adjusting its passage section, which is controlled by the flow of exhaust gas, that is to say by the engine speed.
  • the valve adjusts the passage section of an orifice for placing the resonator in communication with a chamber of the silencer.
  • the flow of gas leaving the resonator and entering the muffler chamber is thus automatically modified according to the flow of exhaust gas. It is all the more important that the gas flow is important, that is to say that the engine speed is high.
  • the valve control can be obtained from various parameters of the exhaust gas flow, for example from the pressure or the temperature inside the resonator or from the speed of the output flow of the silencer.
  • the valve adjusts an orifice for placing the resonator in communication with an inlet or pressure tapping tube, as a function of the outlet speed of the exhaust flow.
  • the muffler shown is of the resonator type and consequently comprises an envelope 1 closed at each of its ends by a cup 2 and divided by a number of interior cups 3 into a number of chambers, for example chambers 4, 5 and 6 represented.
  • Several tubes 8, 9 and 10 are mounted parallel to each other in the casing 1 and communicate with each other both by their perforations and by chambers such as chamber 5 into which two of them open.
  • the chamber 6 also communicates with the chamber 5 via a pressure take-off tube 12 and thus constitutes a resonator.
  • a flexible valve 16 is fixed on the partition 3 to the right of the orifice 14 and tends at all times to apply on the edge of this orifice, so as to close it.
  • the valve 16 opens gradually. It then clears a passage whose cross section depends on the pressure inside the resonator 6.
  • the movement of the valve 16 and the variation in section of the orifice 14 modify the operation of the resonator and adapt the acoustic attenuation obtained to the flow of gas flowing, that is to say to the engine speed.
  • the slowing of the flow caused by the reduction in section of the orifice 14 or even the closing of this orifice eliminates any phenomenon of aspiration in the inlet tube 8 towards the motor and, consequently, reduces considerably the risk of fuel entering the muffler.
  • the valve for adjusting the section of the orifice 14 can be controlled by another parameter of the flow of exhaust gas.
  • the silencer may include a guided valve 18 carried by a rod 20 which passes through the orifice 14 and is integral with an expandable strip 22 sensitive to the temperature prevailing in the resonator 6.
  • the strip expansion 22 is preferably supported on the closing cup 2 of the silencer, so that during expansion it pushes the rod 20 towards the chamber 5 and separates the valve 18 from the orifice 14.
  • the position of the guided valve 18 relative to the partition 3 determines the area of the fluid passage section through the orifice 14 and depends on the expansion of the strip 22 which depends on the engine speed, since the variation of the gas temperature in the resonator is proportional to the variation of this regime.
  • the outlet 14 of the resonator 6 is adjusted by means of a butterfly-type shutter 24 pivoting about an axis 25 and controlled by the flow of gas in the outlet tube 10 of the silencer .
  • the butterfly 24 is connected, by means of a link 26 articulated at its two ends, to a sliding rod 28 fixed to the membrane 30 of a manometric capsule.
  • a tube 32 of small diameter connects the manometric capsule to the outlet tube of the silencer, so that the membrane 30 is subjected to the difference between the pressures prevailing in the resonator and in the thin tube 32.
  • the gas flow s' flowing in the outlet tube 10 creates a depression in the tube 32 which is proportional to the flow rate inside the tube 10, so that the position of the membrane 30 varies at the same time as the flow of exhaust gas at the interior of the silencer and in particular in the outlet tube 10, that is to say with the engine speed.
  • the tube 10 comprises near its outlet end a constriction 34 constituted by a local deformation of its wall or internal boss 35 and the narrow dip tube 32 opens into this constriction.
  • the exhaust gases exiting through the tube 10 are thus accelerated by the throttle 34, so that they create an increased vacuum in the tube 32 and facilitate the action of the membrane 30 on the butterfly valve 24.
  • the outlet port 14 of the resonator has a passage section which varies with the engine speed.
  • the butterfly valve 24 in effect gradually opens this orifice under the action of the vacuum created in the tube 32, that is to say as the flow of gas flowing through the tube 10 increases.
  • the butterfly valve 24 tends to close the orifice 14.
  • the orifice 14 can be an orifice for communicating the chamber of the resonator 6 with the chamber 5, but it can also, according to an alternative embodiment shown in FIG. 3, allow the chamber of the resonator 6 with an intermediate chamber 36, a tube 38 preferably being mounted in the orifice 14 and opening into the chamber 36 which communicates with the chamber 5 through an orifice 40 and thus constitutes a second open resonator.
  • the flow modulation device modifies the acoustic attenuation characteristics of the muffler as a function of the engine speed.
  • An orifice 42 is then preferably provided in the pressure take-off tube 12 of the resonator 6 inside the latter.
  • a flap 44 pivoting on an axis 45 can move in front of the tube 12 and more or less completely close the orifice 42 under the action of a pressure capsule 46 to the membrane 48 of which it is connected by a sliding rod 50.
  • the membrane 48 is subjected to the vacuum prevailing in a narrow tube 52 which opens into the exhaust gas outlet tube 10, in line with a throttle 54.
  • the throttle 54 is preferably achieved by a local deformation 55 of the wall of the tube 10.
  • this constriction 54 causes an acceleration of the output flow of the silencer and, consequently, increases the vacuum in the tube 52 and the deformation of the membrane 48.
  • the flap 44 gradually releases the orifice 42 as the gas velocity increases in the tube 10 and, on the contrary, gradually closes this orifice when this speed decreases, that is - say that the engine speed is reduced.
  • the opening of the orifice 42 has the same effect as a shortening of the length of the pressure tapping tube 12 of the resonator and, consequently, modifies the frequency of the gas inside this resonator and allows the silencer to '' be constantly adapted to the engine speed.

Landscapes

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

Claims (8)

1. Vorrichtung zur Modulation der Gasströmung in einem Auspuff-Vorschalldämpfer einer Brennkraftmaschine, welcher im Innern eines geschlossenen Mantels wenigstens zwei nacheinander vom Auspuffgas durchströmte gelochte Rohre und einen offenen Resonator aufweist, dadurch gekennzeichnet, daß sie im Resonator (6) eine Offnung (14, 42) aufweist, welche mit einer Stellklappe (16, 18, 24, 44) zur Einstellung ihres Durchtrittsquerschnitts versehen ist, welche durch den mit der Motordrehzahl variierenden Auspuffgasstrom gesteuert wird.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Stellklappe für eine Öffnung, welche den Resonator (6) mit einer Kammer (5, 36) des Schalldämpfers in Verbindung setzt, aufweist.
3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß sie eine weiche Stellklappe aufweist, welche durch den Innendruck des Resonators (6) verformt und von der Öffnung abgespreizt wird.
4. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß sie eine geführte Stellklappe (18) aufweist, welche mit einer unter Wärmeeinwirkung dehnbaren und innerhalb des Resonators (6) angebrachten Lamelle (22) fest verbunden ist.
5. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß sie eine schwenkbare Stellklappe (24, 44) aufweist, welche mit einer Membran einer Druckmeßdose (30, 46) verbunden ist, welche über ein kleines Unterdruckrohr (32, 52) mit dem Ausgangsrohr (10) des Schalldämpfers in Verbindung steht.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das kleine Unterdruckrohr in eine Einschnürung (34, 54) des Ausgangsrohres (10) des Schalldämpfers mündet.
7. Vorrichtung nach einem der Ansprüche 5 und 6, dadurch gekennzeichnet, daß die schwenkbare Verschlußklappe am Eingang eines Rohres (28) angebracht ist, welches den Resonator (6) mit einer Kammer (36) des Schalldämpfers verbindet.
8. Vorrichtung nach einem der Ansprüche 5 und 6, dadurch gekennzeichnet, daß die schwenkbare Verschlußklappe (44) auf dem Druckanschlußrohr (12) des Resonators (6) angebracht ist und sich vor einer Öffnung (42) dieses Rohres bewegt.
EP82401704A 1981-10-14 1982-09-20 Einrichtung zur Gasströmungsmodulation im Abgasschalldämpfer von Brennkraftmaschinen Expired EP0077230B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8119304 1981-10-14
FR8119304A FR2514412A1 (fr) 1981-10-14 1981-10-14 Dispositif de modulation de l'ecoulement des gaz dans un silencieux d'echappement de moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0077230A1 EP0077230A1 (de) 1983-04-20
EP0077230B1 true EP0077230B1 (de) 1985-01-09

Family

ID=9263025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401704A Expired EP0077230B1 (de) 1981-10-14 1982-09-20 Einrichtung zur Gasströmungsmodulation im Abgasschalldämpfer von Brennkraftmaschinen

Country Status (6)

Country Link
US (1) US4484659A (de)
EP (1) EP0077230B1 (de)
JP (1) JPS58126414A (de)
DE (1) DE3261850D1 (de)
ES (1) ES516782A0 (de)
FR (1) FR2514412A1 (de)

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JPS59520U (ja) * 1982-06-25 1984-01-05 三菱自動車工業株式会社 消音装置
DE3335427A1 (de) * 1982-10-09 1984-04-12 Mitsubishi Denki K.K., Tokyo Motor-vakuumpumpengruppe
US4539947A (en) * 1982-12-09 1985-09-10 Nippondenso Co., Ltd. Resonator for internal combustion engines
US4546733A (en) * 1983-03-22 1985-10-15 Nippondenso Co., Ltd. Resonator for internal combustion engines
DE3419442A1 (de) * 1983-05-25 1984-12-20 Kogata Gasu Reibo-gijutsu Kenkyu Kumiai, Tokio/Tokyo Waermetauscher
SE447290B (sv) * 1985-03-19 1986-11-03 Volvo Ab Anordning for dempning av avgasljud medelst en av avgasflekt beroende reglerventil
AT399022B (de) * 1985-04-15 1995-03-27 Bombardier Rotax Gmbh Zweitakt-brennkraftmaschine
JPH0745806B2 (ja) * 1986-11-21 1995-05-17 カルソニック株式会社 消音器
JPH0643452Y2 (ja) * 1988-02-08 1994-11-14 株式会社三五 消音器
US4866933A (en) * 1988-09-21 1989-09-19 Whau Chih Kao Exhaust silencer
JPH0714450Y2 (ja) * 1989-02-10 1995-04-10 株式会社イナックス シンク及びカウンターの取付構造
FR2649756B1 (fr) * 1989-07-12 1994-05-27 Peugeot Dispositif d'echappement perfectionne pour un moteur muni d'un turbocompresseur, notamment pour vehicule automobile
US5112198A (en) * 1991-02-08 1992-05-12 General Motors Corporation Refrigerant compressor having variable restriction pressure pulsation attenuator
US5248859A (en) * 1991-03-25 1993-09-28 Alexander Borla Collector/muffler/catalytic converter exhaust systems for evacuating internal combustion engine cylinders
US5801343A (en) * 1993-11-09 1998-09-01 Futaba Industrial Co., Ltd. Muffler for internal combustion engine
US5614699A (en) * 1994-05-09 1997-03-25 Nissan Motor Co., Ltd. Automobile exhaust noise suppressor
JP3379254B2 (ja) * 1994-12-26 2003-02-24 日産自動車株式会社 排気消音装置
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DE19540716C1 (de) * 1995-11-02 1997-04-17 Gillet Heinrich Gmbh Schalldämpfer mit variabler Dämpfungscharakteristik
FR2744490B1 (fr) * 1996-02-01 1998-04-24 Ecia Equip Composants Ind Auto Dispositif de commande de l'ecoulement des gaz d'echappement dans une ligne d'echappement, notamment de vehicule automobile
JP3214338B2 (ja) * 1996-03-06 2001-10-02 日産自動車株式会社 自動車用排気消音装置
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DE69902085T2 (de) * 1999-02-18 2003-01-30 Hyundai Motor Co., Seoul/Soul Semiaktiver Schalldämpfer für Brennkraftmaschine
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US6470998B1 (en) 1999-10-26 2002-10-29 James E. White Modular muffler with end plate adaptors and spark arresters
JP3342461B2 (ja) * 2000-03-01 2002-11-11 本田技研工業株式会社 排気消音装置
JP2002089257A (ja) * 2000-09-11 2002-03-27 Calsonic Kansei Corp 制御マフラ用バルブおよび制御マフラ用バルブの弁体組み付け方法
US6390132B1 (en) 2000-12-07 2002-05-21 Caterpillar Inc. Fluid stream pulse damper
US6732510B2 (en) 2002-02-06 2004-05-11 Arvin Technologies, Inc. Exhaust processor with variable tuning system
JP3738000B2 (ja) * 2002-10-07 2006-01-25 本田技研工業株式会社 消音器用バルブ装置
US6899199B2 (en) * 2002-10-24 2005-05-31 Barnes Group Inc. Flapper finger valve assembly
US6915877B2 (en) 2003-01-13 2005-07-12 Garabed Khayalian Muffler device
DE10311201A1 (de) * 2003-03-14 2004-09-30 Heinrich Gillet Gmbh Schalldämpfer mit variabler Dämpfungscharakteristik
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US7575096B2 (en) * 2005-09-21 2009-08-18 Emcon Technologies Llc Pressed assembly for passive valve installation
US20070107981A1 (en) * 2005-10-07 2007-05-17 Sicotte Jason M Exhaust silencer
US8095082B2 (en) * 2007-10-10 2012-01-10 Qualcomm, Incorporated Dual band radio frequency transmitter
US20090229913A1 (en) * 2008-02-08 2009-09-17 Waldron's Antique Exhaust Dual Mode Exhaust Muffler
CN102705043B (zh) * 2012-06-05 2014-12-10 徐州重型机械有限公司 一种起重机及其排气系统的消声器
KR101316133B1 (ko) * 2012-08-10 2013-10-08 현대자동차주식회사 차량용 소음기
US9394864B2 (en) * 2014-06-11 2016-07-19 Ford Global Technologies, Llc Multi-frequency quarter-wave resonator for an internal combustion engine vehicle
US9695719B2 (en) * 2014-09-24 2017-07-04 Kawasaki Jukogyo Kabushiki Kaisha Exhaust muffler device for combustion engine
US10302052B2 (en) 2016-11-16 2019-05-28 Ford Global Technologies, Llc Vacuum actuated multi-frequency quarter-wave resonator for an internal combustion engine
US11149602B2 (en) * 2018-05-22 2021-10-19 Faurecia Emissions Control Technologies, Usa, Llc Passive flap valve for vehicle exhaust system
KR20210056793A (ko) * 2019-11-11 2021-05-20 현대자동차주식회사 차량용 머플러
CN116480634A (zh) * 2023-03-07 2023-07-25 东莞怡和嘉业医疗科技有限公司 一种减噪盒及通气治疗设备

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DE2206875A1 (de) * 1972-02-14 1973-08-16 Motor Condensator Walker Manuf Schalldaempfer

Also Published As

Publication number Publication date
JPS6323366B2 (de) 1988-05-16
ES8307037A1 (es) 1983-06-16
US4484659A (en) 1984-11-27
FR2514412B1 (de) 1984-01-13
EP0077230A1 (de) 1983-04-20
JPS58126414A (ja) 1983-07-27
DE3261850D1 (en) 1985-02-21
ES516782A0 (es) 1983-06-16
FR2514412A1 (fr) 1983-04-15

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