EP3555436A1 - Ligne d'échappement de véhicule automobile comportant des moyens de limitation du bruit - Google Patents
Ligne d'échappement de véhicule automobile comportant des moyens de limitation du bruitInfo
- Publication number
- EP3555436A1 EP3555436A1 EP17821868.1A EP17821868A EP3555436A1 EP 3555436 A1 EP3555436 A1 EP 3555436A1 EP 17821868 A EP17821868 A EP 17821868A EP 3555436 A1 EP3555436 A1 EP 3555436A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- exhaust line
- wall
- tube
- motor vehicle
- 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
- 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
- F01N2310/14—Wire mesh fabric, woven glass cloth 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
- F01N2470/02—Tubes being perforated
Definitions
- the invention relates to a motor vehicle exhaust line comprising at least one perforated tube having a plurality of cavities and a sleeve consisting of a metal tubular mesh formed of meshes.
- Such an exhaust line having a perforated tube may present when the vehicle is operating, wheezing problems because the flow of gas passing over a cavity causes the generation of a significant acoustic emission when the length of the cavity allows a synchronization between the moment of release of a vortex at the upstream edge of the cavity and the impact of another vortex at the downstream edge of the cavity.
- the downstream acoustic emission then maintains and amplifies the generation of a new vortex at the upstream edge of the cavity.
- the object of the invention is an exhaust line comprising means for limiting noise that is inexpensive and light.
- the invention also relates to an exhaust line having noise limiting means which has a small influence on the pressure losses and the pressure balance.
- the invention proposes an exhaust line of the type mentioned above, characterized in that the length of a mesh of the trellis constituting the sleeve is less than or equal to half the length of a cavity of the tube, so as to avoid the formation of vortices opposite the cavities.
- the sleeve is disposed against an inner wall of the perforated tube.
- the sleeve is disposed against an outer face of the wall of the perforated tube, the mesh forming the sleeve being pressed into the cavities of the perforated tube so as to form recesses opposite the cavities.
- the sleeve is disposed against an outer face of the perforated tube, the sleeve having perforations located opposite the cavities of the perforated tube.
- the perforations comprise a peripheral wall substantially perpendicular to the wall of the tube and extending through the cavities of the tube.
- a free edge of the peripheral wall protrudes from the inner face of the wall of the tube.
- FIG. 1 is a schematic side sectional view of a first embodiment of an exhaust line according to the invention.
- FIG. 2 is a schematic side sectional view of a second embodiment of an exhaust line according to the invention.
- FIG. 3 is a schematic side sectional view of a third embodiment of an exhaust line according to the invention.
- L, V, T of Figures 1 to 3.
- an exhaust line 10 of a motor vehicle comprises a perforated pipe 12 traversed by an exhaust gas flow F.
- the perforated pipe 12 comprises a plurality of cavities 14 piercing right through the wall 16 of the pipe 12.
- a sleeve 18 formed by a wire mesh is disposed inside the pipe 12 so as to prevent the exhaust gases, flowing along the cavities 14, from producing annoying noise emissions. .
- the sleeve 18 is disposed against an inner face 16int of the wall 16 of the pipe 12. It is fixed to the pipe 12 for example by welding.
- the mesh size of the mesh is provided for the length of a lattice mesh is less than or equal to half the length of a tube cavity
- the sleeve 18 formed of a lattice is disposed outside the pipe 12, along an outer face 16ext of the wall 16 of the pipe 12.
- the mesh size of the mesh forming the sleeve 18 is provided so that the length of a mesh of the mesh is less than or equal to half the length of a cavity of the tube.
- the mesh is then pressed into the cavities 14 so as to form recesses 20 on the surface of the sleeve 18.
- the bottom 200 of the recesses 20 formed in the sleeve 18 is flush with the surface of the inner face 16int of the wall 16.
- the risks of vortex formation are limited.
- the sleeve 18 formed of a lattice is disposed outside the pipe 12, along the outside face 16ext of the pipe 16.
- the mesh size of the mesh forming the sleeve 18 is provided so that the length of a mesh of the mesh is less than or equal to half the length of a cavity of the tube.
- the lattice forming the sleeve 18 is perforated opposite the cavities 14 of the pipe 16.
- the perforations 22 thus formed in the sleeve 18 form a peripheral wall 220 extending through the cavities 14 towards the inside of the pipe 16, in a direction substantially perpendicular to the wall of the pipe 16.
- a free edge 222 of the wall 220 protrudes with respect to the inner face 16int of the wall 16 of the pipe 12 so as to form a deflector avoiding the formation of vortices opposite cavities 14.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1662712A FR3060649B1 (fr) | 2016-12-19 | 2016-12-19 | Ligne d'echappement de vehicule automobile comportant des moyens de limitation du bruit |
| PCT/EP2017/082878 WO2018114615A1 (fr) | 2016-12-19 | 2017-12-14 | Ligne d'échappement de véhicule automobile comportant des moyens de limitation du bruit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3555436A1 true EP3555436A1 (fr) | 2019-10-23 |
| EP3555436B1 EP3555436B1 (fr) | 2021-10-27 |
Family
ID=58162846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17821868.1A Active EP3555436B1 (fr) | 2016-12-19 | 2017-12-14 | Ligne d'échappement de véhicule automobile comportant des moyens de limitation du bruit |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3555436B1 (fr) |
| FR (1) | FR3060649B1 (fr) |
| WO (1) | WO2018114615A1 (fr) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR66177E (fr) * | 1954-02-15 | 1956-05-17 | Pot d'échappement libre silencieux pour moteurs à explosion et à combustion | |
| DE1031055B (de) * | 1955-09-06 | 1958-05-29 | Eberspaecher J | Behaelter mit Schallschluckstoffuellung und Fuehrungskanal fuer pulsierende Gasstroemung, insbesondere Schalldaempfer fuer Brennkraftmaschinen |
| US3147097A (en) * | 1962-04-09 | 1964-09-01 | Aguas Cayetano | Engine exhaust cleaner and muffler |
| US3339347A (en) * | 1965-10-05 | 1967-09-05 | Jr Herbert R Otto | Filter |
| US5962821A (en) * | 1995-01-27 | 1999-10-05 | Iannetti; Francesco E. | Internal combustion engine noise reduction apparatus |
| US7017706B2 (en) * | 2001-12-21 | 2006-03-28 | Honeywell International, Inc. | Turbine noise absorber |
| KR200340730Y1 (ko) * | 2003-09-19 | 2004-02-11 | 유영배 | 자동차 머플러 |
| US8191581B2 (en) * | 2009-04-16 | 2012-06-05 | Emcon Technologies, Llc | Wire tube structure for exhaust component |
| WO2013069851A1 (fr) * | 2011-11-09 | 2013-05-16 | 주식회사 준비엘 | Pot d'échappement pour automobile |
-
2016
- 2016-12-19 FR FR1662712A patent/FR3060649B1/fr not_active Expired - Fee Related
-
2017
- 2017-12-14 EP EP17821868.1A patent/EP3555436B1/fr active Active
- 2017-12-14 WO PCT/EP2017/082878 patent/WO2018114615A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3060649B1 (fr) | 2019-08-02 |
| FR3060649A1 (fr) | 2018-06-22 |
| EP3555436B1 (fr) | 2021-10-27 |
| WO2018114615A1 (fr) | 2018-06-28 |
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