EP0391014B1 - Absorptions-Schalldämpfer für Brennkraftmaschinen, insbesondere für Geländefahrzeuge - Google Patents

Absorptions-Schalldämpfer für Brennkraftmaschinen, insbesondere für Geländefahrzeuge Download PDF

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Publication number
EP0391014B1
EP0391014B1 EP89830558A EP89830558A EP0391014B1 EP 0391014 B1 EP0391014 B1 EP 0391014B1 EP 89830558 A EP89830558 A EP 89830558A EP 89830558 A EP89830558 A EP 89830558A EP 0391014 B1 EP0391014 B1 EP 0391014B1
Authority
EP
European Patent Office
Prior art keywords
envelope
silencer
resistant
annular
tube
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
EP89830558A
Other languages
English (en)
French (fr)
Other versions
EP0391014A3 (en
EP0391014A2 (de
Inventor
Franco Acerbis
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.)
Acerbis Italia SpA
Original Assignee
Acerbis Italia SpA
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 Acerbis Italia SpA filed Critical Acerbis Italia SpA
Priority to AT89830558T priority Critical patent/ATE103371T1/de
Publication of EP0391014A2 publication Critical patent/EP0391014A2/de
Publication of EP0391014A3 publication Critical patent/EP0391014A3/fr
Application granted granted Critical
Publication of EP0391014B1 publication Critical patent/EP0391014B1/de
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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1861—Construction facilitating manufacture, assembly, or disassembly the assembly using parts formed by casting or moulding
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/16—Selection of particular 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1827—Sealings specially adapted for exhaust systems
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
    • 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 exhaust 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/18—Plastics material, e.g. polyester resin

Definitions

  • the present invention relates to an improved absorption silencer for internal combustion engines, in particular for all-terrain vehicles.
  • exhaust systems for motor vehicles essentially consist of an exhaust pipe proper and a silencer, also called an "exhaust pipe”, which is basically intended to reduce noise at exhaust to legal limits.
  • exhaust pipe also called an "exhaust pipe”
  • the shapes and dimensions of both the exhaust pipe and the muffler are decisive, but negatively and negatively affect the performance of the engine itself by preventing the free flow of the burnt gases at the outlet, and this in particular. for two-stroke engines, most often used on all-terrain vehicles.
  • the silencers known today and made up of a metal casing which delimits the expansion chamber of essentially cylindrical shape with a diameter greater than that of the exhaust tube but of limited size are of two types: the first operating by "resonance or reflection”, comprises several chambers inserted in series or in parallel with the gas outlet tube and which acoustically filter out most of the exhaust noise; and the second type operating by “absorption”, comprises a sound-absorbing material, for example rock wool, placed between the perforated exhaust tube and the envelope and which, by its vibration, dissipates the energy of exhaust gas.
  • the object of the present invention is to eliminate the aforementioned drawbacks by providing an absorption type muffler which allows a reduction in both exhaust noise and thermal losses, an increase in its service life and the possibility of replacing only the envelope in the event of rupture.
  • said envelope is made of synthetic thermoplastic material such as nylon or PPS, and the annular seals are made of silicone or viton.
  • the solution proposed by the present invention allows the production of a silencer which reduces the exhaust noise by approximately 4-5 dBA, reduces the dispersion of heat towards the outside and strongly attenuates the vibrations of the envelope which is advantageously achievable by rotational molding and therefore without welding, and which in addition can be mounted on the exhaust tube of removably so that it can be easily and quickly replaced without requiring disassembly or replacement of the exhaust pipe.
  • FIG. 1 shows a front view, partly in section, of an absorption silencer according to the invention
  • FIG. 2 shows a sectional view along line A-A of Fig 1
  • FIG. 3 shows, in section, the detail of the connection between the casing and the exhaust tube of the silencer of FIG. 1.
  • this silencer on the tube as follows.
  • the first part 10 of the casing 1 with the corresponding annular seal 20 mounted in the seat 14, is threaded onto the perforated tube 5 by its rear end and thus slid up to the stop 16 provided at the front end of the tube 5 ; after having filled said part 10 of the envelope with rock wool or similar material, the second part 18, already provided with the annular seal 21, is mounted by threading it onto the rear end of the tube 5, and bringing it close to the first part of the envelope until it is joined to it by interlocking interlocking.
  • at least one radial screw 17 for connection is advantageously provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Road Paving Structures (AREA)

Claims (3)

  1. Absorptionsschalldämpfer für Explosionsmotoren, insbesondere für Geländefahrzeuge, der ein perforiertes Austrittsrohr (5) umfaßt, auf das eine Füllung (13) aus hitzebeständigem und schalldämpfendem Material aufgewickelt ist, sowie einen Mantel (1) aus hitzebeständigem Material, der dazu bestimmt ist, auf dem Austrittsrohr (5) unter Zwischenfügung des Füllmaterials (13) vermittels zweier Ringdichtungen (20, 21) befestigt zu werden, von denen die eine (20) vorne und die andere (21) hinten angeordnet ist und die aus hitzebeständigem und teilweise elastischem Material bestehen und im übrigen so ausgebildet sind, daß sie die Dichtheit des Mantels in bezug auf das Austrittsgas sicherstellen,
       dadurch gekennzeichnet, daß der Mantel zwei Teile (10,18) umfaßt, daß diese Teile (10,18) des Mantels Ende an Ende durch Falzeingriff zusammenfügbar sind, daß die Ringdichtungen (20,21) mit einer Ringnut (22,23) versehen sind, die einem ringförmigen Sitz (14,12) der Teile (10,18) des Mantels (1) entspricht, und daß das Austrittsrohr (5) entsprechend der vorderen Dichtung (20) mit einem elastischen Metallring (50) mit einem Stoppanschlag (51) versehen ist.
  2. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Ringdichtungen (20,21) jeweils einstückig aus Silikon oder aus Viton hergestellt sind.
  3. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Teile (10,18) des Mantels (1) aus einem synthetischen thermoplastischen Material, wie beispielsweise Nylon oder PPS, durch ein Rotationsgußverfahren hergestellt sind.
EP89830558A 1989-04-07 1989-12-20 Absorptions-Schalldämpfer für Brennkraftmaschinen, insbesondere für Geländefahrzeuge Expired - Lifetime EP0391014B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89830558T ATE103371T1 (de) 1989-04-07 1989-12-20 Absorptions-schalldaempfer fuer brennkraftmaschinen, insbesondere fuer gelaendefahrzeuge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT939589 1989-04-07
IT8909395A IT1233289B (it) 1989-04-07 1989-04-07 Silenziatore ad assorbimento per motori a scoppio, in particolare per veicoli fuoristrada

Publications (3)

Publication Number Publication Date
EP0391014A2 EP0391014A2 (de) 1990-10-10
EP0391014A3 EP0391014A3 (en) 1990-12-05
EP0391014B1 true EP0391014B1 (de) 1994-03-23

Family

ID=11129496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830558A Expired - Lifetime EP0391014B1 (de) 1989-04-07 1989-12-20 Absorptions-Schalldämpfer für Brennkraftmaschinen, insbesondere für Geländefahrzeuge

Country Status (6)

Country Link
US (1) US5033580A (de)
EP (1) EP0391014B1 (de)
AT (1) ATE103371T1 (de)
DE (1) DE68914139T2 (de)
ES (1) ES2054093T3 (de)
IT (1) IT1233289B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001524636A (ja) * 1997-11-21 2001-12-04 フェレイラ，ステファナス 消音器
US7325652B2 (en) * 2001-11-06 2008-02-05 Ocv Intellectual Capital, Llc Bumper/muffler assembly
US7510050B2 (en) * 2004-01-27 2009-03-31 Emler Don R Vehicle exhaust systems
US7942237B2 (en) * 2006-04-12 2011-05-17 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system with integrated reflective chamber
US7934580B2 (en) * 2006-04-12 2011-05-03 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system
US20100307863A1 (en) * 2007-12-14 2010-12-09 Ocv Intellectual Capital, Llc Composite muffler system thermosetable polymers

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101460A (en) * 1932-12-17 1937-12-07 Schmidt Ulrich Sound muffling device
US3159237A (en) * 1959-10-28 1964-12-01 Nelson Muffler Corp Exhaust muffler
GB950029A (en) * 1962-03-21 1964-02-19 Svein Dyrhoff Sealing collar for tubes and rods
US3181646A (en) * 1963-04-15 1965-05-04 Howard C Edwards Silencer having contiguous concentric layers of sound absorbent material
US3884037A (en) * 1969-02-17 1975-05-20 Texaco Inc Internal combustion engine system for exhaust emissions control utilizing an acoustic catalytic muffler
CH591070A5 (de) * 1975-09-10 1977-08-31 Terraillon
BR5701149U (pt) * 1977-09-16 1978-03-07 P Negrao Atenuador
CH647302A5 (de) * 1979-06-06 1985-01-15 Alusuisse Vorrichtung zum ableiten der abgase von verbrennungskraftmaschinen.
JPS60175717A (ja) * 1984-02-20 1985-09-09 Honda Motor Co Ltd 内燃機関用消音器

Also Published As

Publication number Publication date
DE68914139T2 (de) 1994-11-03
ES2054093T3 (es) 1994-08-01
US5033580A (en) 1991-07-23
IT1233289B (it) 1992-03-26
ATE103371T1 (de) 1994-04-15
EP0391014A3 (en) 1990-12-05
IT8909395A0 (it) 1989-04-07
EP0391014A2 (de) 1990-10-10
DE68914139D1 (de) 1994-04-28

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