EP2110522A1 - Silencieux pour une suppression efficace du bruit d'échappement - Google Patents

Silencieux pour une suppression efficace du bruit d'échappement Download PDF

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Publication number
EP2110522A1
EP2110522A1 EP08425254A EP08425254A EP2110522A1 EP 2110522 A1 EP2110522 A1 EP 2110522A1 EP 08425254 A EP08425254 A EP 08425254A EP 08425254 A EP08425254 A EP 08425254A EP 2110522 A1 EP2110522 A1 EP 2110522A1
Authority
EP
European Patent Office
Prior art keywords
silencer
exhaust
pipe
inside part
exhaust noise
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.)
Withdrawn
Application number
EP08425254A
Other languages
German (de)
English (en)
Inventor
Claudio Bastelli
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.)
F Lli Bastelli SNC Di Bastelli Paolo Bastelli Claudio & C
Original Assignee
F Lli Bastelli SNC Di Bastelli Paolo Bastelli Claudio & C
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 F Lli Bastelli SNC Di Bastelli Paolo Bastelli Claudio & C filed Critical F Lli Bastelli SNC Di Bastelli Paolo Bastelli Claudio & C
Priority to EP08425254A priority Critical patent/EP2110522A1/fr
Publication of EP2110522A1 publication Critical patent/EP2110522A1/fr
Withdrawn legal-status Critical Current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
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • 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
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/02—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate silencers in series
    • 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 gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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 gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
    • 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 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • 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 gas passages, pipes or tubes
    • F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
    • 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
    • F01N2490/02—Two or more expansion chambers in series connected by means of tubes
    • F01N2490/04—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet only in one direction

Definitions

  • the invention refers to a new and original silencer able to considerably suppress the exhaust noise.
  • the conventional silencers i.e. providing separators connected each others with openings, determine a exhaust noise suppression on an average of 35 or 38 decibels in comparison with the 100 decibels gave out to an engine without silencer.
  • the invented silencer is able to suppress the exhaust noise from the 100 decibels to the 50 or 55 decibels. It is known in the previous art the apparatus described in the Italian patent BO2004A000701 where roving is used, like heat insulator and to suppress the noise, together with sharp edges obtained to the direction change of the exhaust pipe to muffle the pressure wave of the exhaust gasses.
  • the invented silencer consists of an exhaust gas inlet pipe 1 having an inside part 2 of dimension suitable to the exhaust engine pipe to which is connected.
  • the inlet pipe 1 is connected to the outside containing body 3 of the oval-shaped or round-shaped silencer.
  • Said outside containing body 3 has an inside chamber 5 in which the roving 4 is placed, where the inside chamber 5 is realized in metal perforated onto the inside wall.
  • separators 6 are provided with connection pipes 7 placed between the separators having inside diameter of five millimetres smaller than the diameter of the inlet pipe 1.
  • a V-shaped pipe 8 Centrally to the outside containing body 3 and connected to the two central separators 6 a V-shaped pipe 8 is provided with inside part 9 having an area 40% smaller than the inside part 2 of the exhaust gas inlet pipe 1.
  • the invented silencer provides a final exhaust pipe 10 with inside part 11 having an area 10% bigger in comparison with the inside part 2 of the exhaust gas inlet pipe 1.
  • the exhaust noise is in part suppressed.
  • the noise is then further suppressed and in higher manner by the forcing passage inside the V-shaped pipe 8.
  • the roving 4 helps the noise reduction and the silencer head insulation such as it resists to the high temperatures with low thermal conductivity and it has in its inside air trapped in its structure placed inside the chamber 5, so further increasing the noise reduction action.
  • the layout of the silencers in set connected by V-shaped pipe 8 is repeatable also more times for other applications and with higher exhaust noise suppression. Infact, placing in set more of two silencers connected to the V-shaped pipe 8 is possible to suppress the exhaust noise to the value suitable, considering that the embodiment with two silencers connected with V-shaped pipe 8 is able to suppress the decibels at the exhaust of about a half in comparison with the noise gave out to an engine without silencer. While the preferred embodiment of the invention has been described in detail, the invention is not limited to the specific embodiment described above. Further modifications and extensions of the present invention may be developed, and all such modifications are deemed to be within the scope of the present invention as defined by the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP08425254A 2008-04-15 2008-04-15 Silencieux pour une suppression efficace du bruit d'échappement Withdrawn EP2110522A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08425254A EP2110522A1 (fr) 2008-04-15 2008-04-15 Silencieux pour une suppression efficace du bruit d'échappement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08425254A EP2110522A1 (fr) 2008-04-15 2008-04-15 Silencieux pour une suppression efficace du bruit d'échappement

Publications (1)

Publication Number Publication Date
EP2110522A1 true EP2110522A1 (fr) 2009-10-21

Family

ID=39800609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425254A Withdrawn EP2110522A1 (fr) 2008-04-15 2008-04-15 Silencieux pour une suppression efficace du bruit d'échappement

Country Status (1)

Country Link
EP (1) EP2110522A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104074572A (zh) * 2014-04-28 2014-10-01 宁波亿超消音科技有限公司 一种双排气缸用消声器总成
CN109057919A (zh) * 2018-09-27 2018-12-21 江苏瑞昌哥尔德发电设备股份有限公司 一种高效降噪消音器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR817517A (fr) * 1937-02-10 1937-09-04 Silencieux pour moteur à explosion ou à combustion
GB619105A (en) * 1946-11-20 1949-03-03 Maxim Silencer Co Improvements in silencing devices for internal combustion engines
DE2930668A1 (de) * 1979-07-28 1981-02-12 Dolmar Maschfab Vorrichtung zur reduzierung der ansaug- und/oder auspuffgeraeusche fuer schnellaufende brennkraftmaschinen, insbesondere fuer brennkraftmaschinenangetriebene kettensaegen, rasenmaeher und kleinkraftraeder
JPS58202322A (ja) * 1982-05-20 1983-11-25 Makoto Minamidate 内燃機関の排気消音装置
EP1403476A2 (fr) * 1996-09-30 2004-03-31 Silentor Notox A/S Silencieux pour courant gazeux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR817517A (fr) * 1937-02-10 1937-09-04 Silencieux pour moteur à explosion ou à combustion
GB619105A (en) * 1946-11-20 1949-03-03 Maxim Silencer Co Improvements in silencing devices for internal combustion engines
DE2930668A1 (de) * 1979-07-28 1981-02-12 Dolmar Maschfab Vorrichtung zur reduzierung der ansaug- und/oder auspuffgeraeusche fuer schnellaufende brennkraftmaschinen, insbesondere fuer brennkraftmaschinenangetriebene kettensaegen, rasenmaeher und kleinkraftraeder
JPS58202322A (ja) * 1982-05-20 1983-11-25 Makoto Minamidate 内燃機関の排気消音装置
EP1403476A2 (fr) * 1996-09-30 2004-03-31 Silentor Notox A/S Silencieux pour courant gazeux

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104074572A (zh) * 2014-04-28 2014-10-01 宁波亿超消音科技有限公司 一种双排气缸用消声器总成
CN104074572B (zh) * 2014-04-28 2016-04-27 宁波亿超消音科技有限公司 一种双排气缸用消声器总成
CN109057919A (zh) * 2018-09-27 2018-12-21 江苏瑞昌哥尔德发电设备股份有限公司 一种高效降噪消音器

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