EP0530892A2 - 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
EP0530892A2
EP0530892A2 EP92202543A EP92202543A EP0530892A2 EP 0530892 A2 EP0530892 A2 EP 0530892A2 EP 92202543 A EP92202543 A EP 92202543A EP 92202543 A EP92202543 A EP 92202543A EP 0530892 A2 EP0530892 A2 EP 0530892A2
Authority
EP
European Patent Office
Prior art keywords
exhaust
muffler
silencer device
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.)
Granted
Application number
EP92202543A
Other languages
German (de)
English (en)
Other versions
EP0530892B1 (fr
EP0530892A3 (en
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.
  • a silencer device operating on the compressed air that expands in exhaust ducts of internal combustion engines (otto or diesel ones) equipped with exhaust brake, characterized in that it is composed of a hollow body whose shape is substantially spheroidal and whose section is approximately ovoidal, assembled downstream of the exhaust manifold of the engine and upstream of the muffler, and equipped with an inlet opening and an outlet opening connected, through adequate ducts, to exhaust manifold and muffler, respectively.
  • the inlet and outlet openings of the silencer can lay not on the same axis.
  • the silencer axis can be not perpendicular to the exhaust manifold and the muffler ones, and can be raking with respect to them.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Pipe Accessories (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
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 true EP0530892A2 (fr) 1993-03-10
EP0530892A3 EP0530892A3 (en) 1993-06-16
EP0530892B1 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)

Citations (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
EP0293783A2 (fr) * 1987-05-30 1988-12-07 Isuzu Motors Limited Dispositif de freinage par turbine

Patent Citations (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
EP0293783A2 (fr) * 1987-05-30 1988-12-07 Isuzu Motors Limited Dispositif de freinage par turbine

Also Published As

Publication number Publication date
JPH0642377A (ja) 1994-02-15
ES2082348T3 (es) 1996-03-16
EP0530892B1 (fr) 1995-12-06
DE69206528T2 (de) 1996-07-18
ITTO910668A1 (it) 1993-03-03
EP0530892A3 (en) 1993-06-16
IT1250293B (it) 1995-04-07
DE69206528D1 (de) 1996-01-18
ITTO910668A0 (it) 1991-09-03
ATE131252T1 (de) 1995-12-15

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