EP0530892B1 - Dispositif silencieux pour un moteur à combustion interne - Google Patents

Dispositif silencieux pour un moteur à combustion interne Download PDF

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Publication number
EP0530892B1
EP0530892B1 EP92202543A EP92202543A EP0530892B1 EP 0530892 B1 EP0530892 B1 EP 0530892B1 EP 92202543 A EP92202543 A EP 92202543A EP 92202543 A EP92202543 A EP 92202543A EP 0530892 B1 EP0530892 B1 EP 0530892B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
silencer device
muffler
internal combustion
engine
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
EP92202543A
Other languages
German (de)
English (en)
Other versions
EP0530892A3 (en
EP0530892A2 (fr
Inventor
Roberto Perlini
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 EP0530892A2 publication Critical patent/EP0530892A2/fr
Publication of EP0530892A3 publication Critical patent/EP0530892A3/en
Application granted granted Critical
Publication of EP0530892B1 publication Critical patent/EP0530892B1/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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • 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
    • F01N2490/16—Chambers with particular shapes, e.g. spherical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • the present invention relates to a silencer device to reduce noises and sounds generated by exhaust gases in otto- or diesel-cycle engines, when an exhaust brake is applied to said engines.
  • the fuel supply is eliminated:
  • Purpose of the present invention is eliminating or substantially reducing the noise generated by the air compressed by the pistons of an internal combustion engine, when this is subjected to the exhaust brake action, operating upstream of the muffler and in series with it, exploiting the principle of sound energy (and therefore noise) reduction, through the wave reflection on the conducing pipe walls, following diameter variations of the pipes themselves (it is in fact known that the increase of a pipe section generates the decrease of low-frequency noises).
  • Another purpose is of the device is being suitable to any diameter of exhaust manifolds and mufflers connected to it, and therefore being able to be used for any engine displacement.
  • a further purpose of the device is being easily manufactured at low costs, due to assembling rationality and linearity.
  • the device 1 is composed of a hollow body 3, usually made of steel, whose shape is substantially spheroidal and whose section is approximately ovoidal, equipped with an inlet opening 5 connected, through a duct 7, to the exhaust mainfold 9 of the turbo 10 ⁇ of the engine 11 equipped with an exhaust brake 12, and with an outlet opening 13 connected, through a duct 15, to the muffler 17.
  • the compressed air going out of the manifold enters into the device 1 from the inlet opening 5 and, since the section of the device 1 is greater than that of the exhaust manifold 9 and of the muffler 17, and since said opening 5 does not lay on the same axis as that of the outlet one 13, and since the axis of the device 1 is raking with respect to those of the two openings 5 and 13, said air reflects expanding inside the hollow body 3, losing kinetic energy, and the sound waves related to it are damped; the compressed air that expands in the exhaust ducts, afterwards, gose out through the outlet opening 13 towards the muffler 17.

Claims (1)

  1. Dispositif de silencieux (1) agissant sur les gaz d'échappement des moteurs à combustion interne, par exemple des moteurs à allumage commandé et à cycle diesel (11) équipés d'un frein sur l'échappement (12), caractérisé en ce que:
       ledit dispositif de silencieux (1) est constitué d'un corps creux (3) dont la forme est sensiblement sphéroïdale, et dont la section est sensiblement ovoïdale, ledit dispositif de silencieux étant équipé d'une ouverture d'entrée (5) et d'une ouverture de sortie (13), ladite ouverture d'entrée (5) étant reliée via un conduit (7) au collecteur d'échappement (9) du moteur (11) en aval de celui-ci, ladite ouverture de sortie (13) étant reliée via un conduit (15) au circuit d'échappement (17) en amont de celui-ci;
       en ce que ladite section dudit dispositif silencieux (1) est supérieure à celle du collecteur d'échappement (9) et à celle du circuit d'échappement (17);
       en ce que ladite ouverture d'entrée (5) n'est pas située sur le même axe que ladite ouverture de sortie (13); et
       en ce que l'axe dudit dispositif de silencieux (1) est incliné par rapport aux axes desdites ouvertures d'entrée et de sortie (5, 13);
       ledit dispositif de silencieux (1), sous l'action dudit frein sur l'échappement (12), étant apte à réfléchir l'air comprimé produit par les pistons, en faisant se dilater ledit air comprimé à l'intérieur du corps creux (3) dudit dispositif et en lui faisant perdre son énergie cinétique, les ondes sonores relatives audit air comprimé étant amorties.
EP92202543A 1991-09-03 1992-08-19 Dispositif silencieux pour un moteur à combustion interne Expired - Lifetime EP0530892B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO910668A IT1250293B (it) 1991-09-03 1991-09-03 Dispositivo silenziatore per motori a combustione interna.
ITTO910668 1991-09-03

Publications (3)

Publication Number Publication Date
EP0530892A2 EP0530892A2 (fr) 1993-03-10
EP0530892A3 EP0530892A3 (en) 1993-06-16
EP0530892B1 true EP0530892B1 (fr) 1995-12-06

Family

ID=11409568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92202543A Expired - Lifetime EP0530892B1 (fr) 1991-09-03 1992-08-19 Dispositif silencieux pour un moteur à combustion interne

Country Status (6)

Country Link
EP (1) EP0530892B1 (fr)
JP (1) JPH0642377A (fr)
AT (1) ATE131252T1 (fr)
DE (1) DE69206528T2 (fr)
ES (1) ES2082348T3 (fr)
IT (1) IT1250293B (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1112678B (de) * 1956-08-08 1961-08-10 Mann & Hummel Filter Resonanzschalldaempfer mit Ringspalt
JPH0674759B2 (ja) * 1987-05-30 1994-09-21 いすゞ自動車株式会社 タ−ビンブレ−キ装置

Also Published As

Publication number Publication date
ES2082348T3 (es) 1996-03-16
ITTO910668A1 (it) 1993-03-03
DE69206528D1 (de) 1996-01-18
EP0530892A3 (en) 1993-06-16
EP0530892A2 (fr) 1993-03-10
DE69206528T2 (de) 1996-07-18
ATE131252T1 (de) 1995-12-15
IT1250293B (it) 1995-04-07
JPH0642377A (ja) 1994-02-15
ITTO910668A0 (it) 1991-09-03

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