EP0781372A1 - Dispositif de silencieux pour moteurs a explosion - Google Patents
Dispositif de silencieux pour moteurs a explosionInfo
- Publication number
- EP0781372A1 EP0781372A1 EP96925789A EP96925789A EP0781372A1 EP 0781372 A1 EP0781372 A1 EP 0781372A1 EP 96925789 A EP96925789 A EP 96925789A EP 96925789 A EP96925789 A EP 96925789A EP 0781372 A1 EP0781372 A1 EP 0781372A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- combustion engine
- stainless steel
- austenitic stainless
- rpm
- 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
Links
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 ; 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
- F01N13/16—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
- 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
- F01N2310/00—Selection of sound absorbing or insulating material
- F01N2310/04—Metallic wool, e.g. steel wool, copper wool or the like
Definitions
- the present invention relates to an exhaust silencer for an internal combustion engine, in particular for an aircraft.
- an exhaust silencer for an internal combustion engine
- the invention provides a simple device using a particular geometry and secondarily austenitic stainless steel elements.
- the proposed device is easy to install and remove, its maintenance is easy and its durability improved over time. .
- the silencer comprises, according to a preferred but nonlimiting embodiment, a perforated nozzle extending over its entire length, this nozzle being surrounded by a coaxial envelope, and this silencer is characterized in that the nozzle forms a geometry with several cones whose function is to form a large volume, to create at least one system known under the term of "Venturi" to accelerate the flow of exhaust gases, by the fact that the gases pass into the annular space between the nozzle and the casing, and escape through outlet parts whose shape and geometry prevent the formation of turbulence generating back pressures.
- the silencer is made of austenitic stainless steel. The space between the nozzle and the casing is filled with a straw also made of austenitic stainless steel.
- An important advantage of the invention is to authorize the treatment of a larger volume of gas, with a larger contact surface, the assembly reducing the noise very significantly, while allowing, which is surprising, the rapid evacuation of this larger volume without generating the foreseeable major drawback of back pressures.
- - Figure 1 a longitudinal section of the device according to the invention
- - Figure 2 a longitudinal section of a variant of the device according to the invention.
- the device comprises a nozzle (1) formed of a cone and a cylinder in one piece made of perforated sheet, alternating holes and diameters different from one row to another, on the entire length of the silencer.
- the outer casing is formed by a front part (2), cylindrical and conical, and by a conical end piece (3) forming the rear part and ending in a bias tube for the evacuation of gases to the low.
- the front part of the outer casing (2) is here conical to facilitate penetration into the air.
- the edges of these two parts (2) and (3) intended to be assembled are machined by molding to form two circular grooves according to a known technique.
- the three elements (1), (2) and (3) are made of austenitic stainless steel (it is recalled that austenite is a component of steel made up of a solid solution of iron and carbon), as well as the straw filling (4).
- the muffler is installed as follows:
- the number and size of the perforations of the nozzle are adapted according to the engine displacement.
- the muffler is connected to the exhaust manifold by an expansion bellows which is itself held by two clamps with braked screws.
- FIG. 2 represents a variant of the device in which the nozzle comprises different counter cones (5), intended, depending on the applications, to improve the expansion of the gases in the straw (4).
- Figure 7 shows the rear part of a device described in Figure 1 or 2, on which is shown the socket (9) of the conical nozzle (3) on the nozzle (4).
- Figures 3 and 4 show other variants of the device according to the invention.
- a perforated partition (6 BIS) in the shape of a disc is placed perpendicular to the axis of the nozzle to hold the stainless steel straw in place and above all facilitate the evacuation of gases, hence the result a decrease in back pressures.
- the straw is preferably held at the rear by this perforated plate or partition (6 BIS) giving passage to the gases at its periphery and, in its center, at the nozzle outlet.
- the nozzle is welded to the rear perforated partition (6 BIS) which is itself screwed onto the rear part of the outer casing (2) and the conical end piece (3), and fitted into the front part from the outer casing (2) to the neck (6).
- Figure 8 shows the front part of a device described in Figure 3 or 4, on which is shown the socket (9) of the nozzle
- Figure 9 shows the rear part of a device described in Figure 3 or 4, on which is represented the welding (8) of the nozzle (1) on the perforated partition (6 BIS), and the screwing (7) of the 'outer casing (2), the conical end piece (3) and the perforated partition (6 BIS).
- a silencer has been produced as described here with a nozzle of thickness 10 / 10th and an envelope of thickness 8 / 10th, the perforations have diameters varying between 8 mm and 10 mm.
- the test protocol provided the following results:
- the level is equal to 72.8 db.
- the level is equal to 78.2 db.
- the device according to the invention makes it possible today to obtain a gain greater than 5 dB minimum compared to current conventional silencers.
- This device is particularly intended for equipping aircraft with a displacement of 4000 to 8000 m2, and more particularly the Piper PA 28.
- the shape and size of the constituents may be adapted on condition that the general concept of the invention is respected, ie the choice of shapes creating at least one Venturi to accelerate the gases over at least part of their path, and shapes that generate as little turbulence as possible at the outlet of the Venturi.
- the cones can be "rounded" and the Venturi replaced by an accelerator device with the same function. The only limits in this area will be the cost and the requirements for assembly and maintenance.
- the straw (4) may be replaced by any structural material fulfilling an equivalent function.
- austenitic stainless steel can be replaced by any material capable of fulfilling the same function.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9508838 | 1995-07-17 | ||
FR9508838A FR2736966B1 (fr) | 1995-07-17 | 1995-07-17 | Silencieux d'echappement pour moteur a explosion, pour aeronef |
PCT/FR1996/001098 WO1997004220A1 (fr) | 1995-07-17 | 1996-07-16 | Dispositif de silencieux pour moteurs a explosion |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0781372A1 true EP0781372A1 (fr) | 1997-07-02 |
EP0781372B1 EP0781372B1 (fr) | 2003-10-01 |
Family
ID=9481216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96925789A Expired - Lifetime EP0781372B1 (fr) | 1995-07-17 | 1996-07-16 | Dispositif de silencieux pour moteurs a explosion |
Country Status (9)
Country | Link |
---|---|
US (1) | US5902970A (fr) |
EP (1) | EP0781372B1 (fr) |
AT (1) | ATE251270T1 (fr) |
AU (1) | AU722523B2 (fr) |
CA (1) | CA2200078A1 (fr) |
DE (1) | DE69630190T2 (fr) |
ES (1) | ES2208756T3 (fr) |
FR (1) | FR2736966B1 (fr) |
WO (1) | WO1997004220A1 (fr) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2267628C (fr) * | 1996-09-30 | 2007-05-15 | Silentor Notox A/S | Silencieux pour flux de gaz |
US6520286B1 (en) | 1996-09-30 | 2003-02-18 | Silentor Holding A/S | Silencer and a method of operating a vehicle |
US5831223A (en) * | 1997-09-24 | 1998-11-03 | Kesselring; Stephen H. | Self-tuning exhaust muffler |
US6457552B2 (en) * | 2000-02-15 | 2002-10-01 | Thomas C. Maganas | Methods and apparatus for low back pressure muffling of internal combustion engines |
EP0959302A3 (fr) * | 1998-05-20 | 2000-02-23 | Eberhard Reitz | Silencieux pour gaine de fumées d'échappement |
CA2275851A1 (fr) * | 1998-06-19 | 1999-12-19 | Kiyomori Asano | Moteur a deux temps et a cylindres multiples pour vehicules legers |
US6241044B1 (en) * | 1999-02-05 | 2001-06-05 | Komatsu Ltd. | Exhaust silencer and communicating pipe thereof |
FR2790788B1 (fr) * | 1999-03-12 | 2001-04-27 | Penel Rech Et Dev | Silencieux-detendeur pour moteurs a explosions |
US6564901B2 (en) * | 2000-03-09 | 2003-05-20 | Woodrow E. Woods | Muffler for marine engine |
US6385967B1 (en) * | 2000-05-31 | 2002-05-14 | Shun-Lai Chen | Exhaust pipe for motor vehicle muffler |
US6382348B1 (en) * | 2001-02-09 | 2002-05-07 | Shun-Lai Chen | Twin muffler |
EP1366273A4 (fr) * | 2001-02-15 | 2005-11-30 | Hp Inc Ttr | Turbine a air pour moteur a combustion |
US6510921B2 (en) | 2001-02-19 | 2003-01-28 | Samson Motorcycle Products, Inc. | Muffler/exhaust extractor |
US6742332B2 (en) * | 2002-01-24 | 2004-06-01 | David L. Piekarski | Exhaust system for internal combustion engine having parallelogram-shaped cross-section |
US20040163886A1 (en) * | 2002-02-15 | 2004-08-26 | Sutera Anthony J. | Air turbine for combustion engine |
US7210653B2 (en) * | 2002-10-22 | 2007-05-01 | The Boeing Company | Electric-based secondary power system architectures for aircraft |
EP1781907B1 (fr) * | 2004-05-28 | 2009-07-29 | Silentor Holding A/S | Silencieux combine |
US7490467B2 (en) | 2004-06-15 | 2009-02-17 | Cummings Craig D | Gas flow enhancer for combustion engines |
US7267297B2 (en) * | 2004-09-02 | 2007-09-11 | The Boeing Company | Integrated axially varying engine muffler, and associated methods and systems |
US7364116B2 (en) * | 2004-09-27 | 2008-04-29 | The Boeing Company | Automatic control systems for aircraft auxiliary power units, and associated methods |
US7344107B2 (en) * | 2004-10-26 | 2008-03-18 | The Boeing Company | Dual flow APU inlet and associated systems and methods |
US7513119B2 (en) * | 2005-02-03 | 2009-04-07 | The Boeing Company | Systems and methods for starting aircraft engines |
US20060243521A1 (en) * | 2005-04-29 | 2006-11-02 | Samson Motorcycle Products, Inc. | Muffler with improved heat dissipation |
US7331422B2 (en) * | 2005-07-18 | 2008-02-19 | Alan Wall | Vortex muffler |
US7380397B2 (en) * | 2005-09-08 | 2008-06-03 | Chih-Kuang Chang | Automobile exhaust pipe assembly |
JP2007205348A (ja) * | 2006-01-06 | 2007-08-16 | Yamaha Motor Co Ltd | マフラー及びマフラーを備えた車両 |
JP2007292049A (ja) * | 2006-03-29 | 2007-11-08 | Yamaha Motor Co Ltd | 鞍乗型車両用排気装置および鞍乗型車両 |
JP2007292047A (ja) * | 2006-03-29 | 2007-11-08 | Yamaha Motor Co Ltd | 鞍乗型車両用排気装置および鞍乗型車両 |
JP2007292046A (ja) * | 2006-03-29 | 2007-11-08 | Yamaha Motor Co Ltd | 鞍乗型車両用排気装置および鞍乗型車両 |
JP2007292048A (ja) * | 2006-03-29 | 2007-11-08 | Yamaha Motor Co Ltd | 鞍乗型車両用排気装置および鞍乗型車両 |
WO2008018821A1 (fr) * | 2006-08-11 | 2008-02-14 | Volvo Construction Equipment Ab | Dispositif pour atténuer et/ou diriger le son, et machine |
US7765784B2 (en) * | 2006-09-25 | 2010-08-03 | The Boeing Company | Thermally compliant APU exhaust duct arrangements and associated systems and methods |
US7905321B2 (en) * | 2007-02-12 | 2011-03-15 | Ballard Iii Ebbin C | Inserts for engine exhaust systems |
US7445083B2 (en) * | 2007-04-09 | 2008-11-04 | Ching-Lin Wu | Automotive muffler |
US9194293B2 (en) * | 2007-09-18 | 2015-11-24 | Hamilton Sundstrand Corporation | Air inlet noise attenuation assembly |
DE102009013222B3 (de) * | 2009-03-17 | 2010-03-11 | Kwh Automobiltechnik Gmbh | Hohlkörper und Verfahren seiner Herstellung |
US8657227B1 (en) | 2009-09-11 | 2014-02-25 | The Boeing Company | Independent power generation in aircraft |
US8256569B1 (en) | 2010-10-04 | 2012-09-04 | Huff Dennis L | Exhaust sound attenuation device and method of use |
US8738268B2 (en) | 2011-03-10 | 2014-05-27 | The Boeing Company | Vehicle electrical power management and distribution |
JP5909425B2 (ja) * | 2012-01-18 | 2016-04-26 | 本田技研工業株式会社 | エンジンの排気装置 |
US9175648B2 (en) * | 2013-10-17 | 2015-11-03 | Ford Global Technologies, Llc | Intake system having a silencer device |
EP3146192A4 (fr) | 2014-05-19 | 2017-12-27 | Eaton Corporation | Résonateur de sortie de turbocompresseur |
WO2016201166A1 (fr) | 2015-06-11 | 2016-12-15 | Eaton Corporation | Résonateur intégré de compresseur volumétrique |
CN105240092A (zh) * | 2015-11-06 | 2016-01-13 | 葛荣超 | 液态汽车尾气净化装置 |
JP7155861B2 (ja) * | 2018-10-19 | 2022-10-19 | スズキ株式会社 | 鞍乗型車両の消音器構造 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1611475A (en) * | 1922-03-23 | 1926-12-21 | Maxim Silencer Co | Silencer |
US1844105A (en) * | 1929-05-08 | 1932-02-09 | Burgess Lab Inc C F | Exhaust muffler |
GB449507A (en) * | 1935-12-27 | 1936-06-29 | Alfred Kuerth | Silencers for exhaust and other pulsating gases and vapours |
CH274724A (de) * | 1949-04-08 | 1951-04-15 | Lustenberger Josef | Schalldämpfer. |
FR1041034A (fr) * | 1951-07-23 | 1953-10-20 | Silencieux pour pot d'échappement de véhicules à moteur à combustion interne | |
US2943695A (en) * | 1957-10-23 | 1960-07-05 | Jeffords Joseph | Silencer |
GB986576A (en) * | 1961-09-07 | 1965-03-17 | Gruenzweig & Hartmann | Silencer |
RO53910A2 (fr) * | 1970-10-26 | 1973-09-20 | ||
FR2345586A1 (fr) * | 1976-03-24 | 1977-10-21 | Nihon Radiator Co | Pot d'echappement |
CH632318A5 (de) * | 1978-03-08 | 1982-09-30 | Josef Meier | Schalldaempfer fuer die auspuffleitung einer brennkraftmaschine, insbesondere eines flugzeugmotors. |
US4282950A (en) * | 1979-09-06 | 1981-08-11 | Peter Fuchs | Muffler |
FR2467974A1 (fr) * | 1979-10-25 | 1981-04-30 | Letang Et Remy Sa | Silencieux plus specialement pour moteurs de vehicules |
US4690245A (en) * | 1983-03-17 | 1987-09-01 | Stemco, Inc. | Flattened venturi, method and apparatus for making |
WO1985004688A1 (fr) * | 1984-04-14 | 1985-10-24 | Robert Eric Young | Ameliorations a des systemes de silencieux |
US4632216A (en) * | 1984-06-27 | 1986-12-30 | Donaldson Company, Inc. | Muffler apparatus and method for making same |
FR2646207A1 (fr) * | 1989-04-25 | 1990-10-26 | Devil | Silencieux modulaire |
DE4122014C1 (en) * | 1991-07-03 | 1992-05-27 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Exhaust filter for IC engine - consists of filter body formed by layers of coated filter plates made of superimposed mats of ferritic or austenitic wire etc. |
JPH05156935A (ja) * | 1991-11-30 | 1993-06-22 | Mazda Motor Corp | 排気ガス浄化用触媒装置 |
DE9215816U1 (fr) * | 1992-11-23 | 1993-01-28 | Ldw Metall-Verarbeitung Gmbh, 2804 Lilienthal, De | |
JPH0742852B2 (ja) * | 1992-12-04 | 1995-05-15 | 義明 角田 | 掃気促進効果を有するマフラ |
JPH07208145A (ja) * | 1994-01-06 | 1995-08-08 | Yoshiaki Tsunoda | 指向性消音装置 |
-
1995
- 1995-07-17 FR FR9508838A patent/FR2736966B1/fr not_active Expired - Fee Related
-
1996
- 1996-07-16 AT AT96925789T patent/ATE251270T1/de not_active IP Right Cessation
- 1996-07-16 AU AU66177/96A patent/AU722523B2/en not_active Ceased
- 1996-07-16 EP EP96925789A patent/EP0781372B1/fr not_active Expired - Lifetime
- 1996-07-16 WO PCT/FR1996/001098 patent/WO1997004220A1/fr active IP Right Grant
- 1996-07-16 US US08/809,951 patent/US5902970A/en not_active Expired - Lifetime
- 1996-07-16 ES ES96925789T patent/ES2208756T3/es not_active Expired - Lifetime
- 1996-07-16 CA CA002200078A patent/CA2200078A1/fr not_active Abandoned
- 1996-07-16 DE DE69630190T patent/DE69630190T2/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9704220A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5902970A (en) | 1999-05-11 |
CA2200078A1 (fr) | 1997-03-14 |
DE69630190T2 (de) | 2004-07-01 |
ES2208756T3 (es) | 2004-06-16 |
AU722523B2 (en) | 2000-08-03 |
WO1997004220A1 (fr) | 1997-02-06 |
FR2736966B1 (fr) | 1997-10-17 |
EP0781372B1 (fr) | 2003-10-01 |
DE69630190D1 (de) | 2003-11-06 |
ATE251270T1 (de) | 2003-10-15 |
AU6617796A (en) | 1997-02-18 |
FR2736966A1 (fr) | 1997-01-24 |
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