EP3765727A1 - Filtre a air avec protection acoustique - Google Patents
Filtre a air avec protection acoustiqueInfo
- Publication number
- EP3765727A1 EP3765727A1 EP19709527.6A EP19709527A EP3765727A1 EP 3765727 A1 EP3765727 A1 EP 3765727A1 EP 19709527 A EP19709527 A EP 19709527A EP 3765727 A1 EP3765727 A1 EP 3765727A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air filter
- engine
- envelope
- filter
- protective envelope
- 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- Withdrawn
Links
- 238000009413 insulation Methods 0.000 title abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 34
- 230000002745 absorbent Effects 0.000 claims description 23
- 239000002250 absorbent Substances 0.000 claims description 23
- 238000000465 moulding Methods 0.000 claims description 8
- 230000002441 reversible effect Effects 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 5
- 239000011496 polyurethane foam Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000006098 acoustic absorber Substances 0.000 description 6
- 239000012814 acoustic material Substances 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0205—Details, e.g. sensors or measuring devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0202—Manufacturing or assembling; Materials for air cleaner housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1277—Reinforcement of walls, e.g. with ribs or laminates; Walls having air gaps or additional sound damping layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10314—Materials for intake systems
- F02M35/10334—Foams; Fabrics; Porous media; Laminates; Ceramics; Coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
- F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face
Definitions
- the present invention relates to a heat engine arranged in a motor vehicle engine compartment and equipped with an air filter.
- the present invention relates more particularly to acoustic protection of the engine and the air filter.
- a motor vehicle engine has an air intake circuit for bringing fresh air at least to the engine and more particularly in a combustion chamber where it will be mixed and compressed in order to bring a combustion.
- Fresh air is generally captured from a front end face of the vehicle to be brought into an air filter capable of releasing impurities such as dust before entering the engine.
- the intake circuit is part of the engine of a power train or GMP which is placed in a motor compartment generally in front of the motor vehicle.
- the operation of the GMP generates noises whose levels must be controlled.
- acoustic absorbers In known manner, the skilled person places acoustic materials on the fixed walls of the engine compartment. These acoustic materials limit the propagation of GMP noise thanks to their acoustic absorption properties. The sound waves are absorbed partially or totally by the acoustic material. These materials are called “acoustic absorbers”.
- the level of noise radiated by the GMP increases when the engine combustion settings are modified to reduce the engine fuel consumption or to reduce the amount of pollutants contained in the exhaust gas.
- Various elements of the GMP can cause noise or spread noise.
- these elements there is the air filter of the engine.
- the document W09319291-A1 proposes an insulation by the integration of an envelope of acoustic insulation highly damping closed cell foam inside the housing of an air filter.
- Said document proposes to cover the walls of an air filter with a two-part acoustic complex: an open-cell foam envelope in contact with the outer wall of the air filter and a highly compressed closed-cell foam envelope. outside the complex.
- the document proposes to attenuate the noise coming from inside the air filter (ducts and volumes). Open cells maximize the absorption of noise in the material.
- the closed cells serve to give an insulating effect to the noise propagating in the material.
- the outer shell serves to reflect noises from inside the air filter to the open-cell absorbent material.
- the object of the invention is to remedy these problems and one of the objects of the invention is an air filter of a motor vehicle engine with optimized acoustic protection.
- the present invention relates more particularly to an air filter of a power unit of a motor vehicle comprising a heat engine arranged in an engine compartment, said filter is fixed in an engine compartment with the engine and comprises a housing with vertical side walls between an upper plane wall and a lower plane wall,
- said filter comprises an outer acoustic protection envelope around the housing and facing the engine.
- the acoustic protection envelope covers the air filter.
- Said envelope is formed of acoustically absorbing material to reduce noise level and noise propagation.
- the protective envelope covers at least one free and unobstructed part of the air filter.
- the envelope extends to cover at least the unobstructed parts of the air filter, that is to say the parts of said filter which are not likely to be hidden by other members of the group. powertrain to take advantage of available space and increase the efficiency of noise reduction.
- the protective casing is kept pressed against the outer wall of the air filter.
- the protective envelope is kept pressed against the outer wall of the air filter in order to optimize the overall dimensions of the assembly formed by the air filter with the protective covering envelope.
- the protective casing is held against the outer wall of the air filter by fast and reversible fixing means.
- the protective envelope is held against the outer wall of the air filter so as, on the one hand, to facilitate the placing of said envelope around said filter and, on the other hand, to facilitate the withdrawal of said envelope from the filter when the The assembly formed by the filter and the protective envelope will be recycled without generating pollution.
- the protective envelope comprises orifices surrounding outlets of the air filter.
- the protective envelope includes orifices surrounding outlets of the air filter so as to wrap the casing of the air filter.
- the protective envelope is formed of absorbent material of flexible structure.
- the protective envelope is formed of absorbent material of flexible structure to facilitate the establishment of said envelope around the air filter.
- the protective envelope is formed by a material having a density of less than 100 g / l.
- the protective envelope is formed by a material with a density of less than 100 g / l in order to reduce the propagation of noise.
- the protective envelope is formed of cross-linked polyurethane foam.
- the low density crosslinked polyurethane foam is a material that provides good noise absorption characteristics.
- the protective envelope is obtained by molding.
- the protective envelope is obtained by molding to obtain an acoustic protection envelope that perfectly suits the shape of the air filter with its protuberances and ribs.
- the protective envelope is obtained in two pieces to cover separately the body of the air filter.
- the acoustic protection envelope is obtained in two substantially adjacent parts to perfectly cover the air filter and facilitate the change of filter cartridge which requires detaching the air filter cover.
- FIG 1 is a schematic cross sectional view of air filter according to the state of the art.
- FIG. 2 is a diagrammatic cross-sectional view of an air filter with the invention.
- a motor vehicle with a heat engine assembly comprises an air filter for removing unwanted particles from an intake air flow before entering said engine.
- the air filter is generally arranged in an engine compartment of said vehicle which is arranged a power train comprising the heat engine with elements necessary for its operation with for example a water pump.
- unwanted particles can be dust or insects but in some cases it can also be sand particles that could severely damage the engine.
- an air filter 10 is generally a casing 11 preferably made of plastic material in which is housed a filter cartridge (not shown) and which comprises an upstream opening 12 connected to a supply duct of air and a downstream opening 13 connected to an air intake circuit duct to the engine.
- the housing 1 1 of the air filter is substantially of parallelepipedal shape with vertical side walls 14 between an upper plane wall 15 and a lower plane wall 16.
- air filter is associated with the housing of air filter, the filter cartridge is known and is not an element of the invention.
- the air filter comprises at least two contiguous and detachable parts which are a body 17 and a cover 18, in order to open the filter and replace the filter cartridge.
- the inner surfaces of the air filter 10 are smooth so as not to disturb the flow of air inside the housing.
- the walls 14, 15, 16 of the air filter must also be rigid enough to limit so-called “breathing” deformations that manifest in the form of contractions and detents of the walls, said walls are subjected to the pulsations of air in the air. the air intake circuit.
- the air filter may be disposed either above the engine (not shown) or offset from the engine as in Figures 1 and 2.
- a support 20 which is either a wall of the engine compartment or a member present in the engine compartment (not shown).
- the air filter undergoes different vibrations generated by the engine which are on the one hand a vibration transfer by the engine in operation which are for example internal excitations and excitations by the wall of the air ducts, and secondly the movements of the GMP relative to the air filter when the air filter is fixed to the support 20 itself attached to the vehicle body.
- the air filter 10 can be fixed via filter pads 21 on this support. These pads are used to reduce the vibrations transmitted by the air filter to its support and the rest of the vehicle.
- the air filter has its vertical side walls 14 and 15 upper plane and lower 16 free or clear of any obstacle likely to hide them.
- the air filter is surrounded by an acoustic protective envelope formed from an absorbent material.
- the absorbent material has a flexible structure.
- said multi-envelope materials comprise an envelope of absorbent material integral with a thermo-compressed shell. Plating a multi-envelope material against the wall of the air filter therefore requires pressing the thermo-compressed shell against the wall of the air filter and presenting the protective envelope with the absorbent material to the outside. opposed to said wall of the air filter to achieve the desired absorption effect.
- thermo-compressed carrier shell is not very tolerant to geometries whose surface has strong radii of curvature. Those skilled in the art therefore use such materials when they have a fairly smooth surface that is to say, with little - or no - ribbing protruding from this surface.
- To use a multi-envelope material with a thermo-compressed shell it should be possible to remove the stiffening ribs that provide the rigidity of the air filter, which is not possible.
- absorbent materials based on fiberglass may be treated with a binder and formed by thermocompression between two envelopes of water-and oil-proof nonwoven film. This absorbent material retains absorbent properties under the nonwoven film. But the thermocompression is not compatible with the stiffening ribs 22 which provide the rigidity of the air filter. The volume of absorbent is therefore minimized when using this technology.
- the acoustic protection envelope is obtained by molding to the shape of the air filter body and its stiffening ribs.
- the protective envelope then has an inner face intended to be turned towards the air filter, said inner face takes at least the shape of an impression of the body of the air filter with the stiffening ribs.
- the shape of this inner face is easy to obtain in molding because said shape covers the wall of the air filter which is already designed according to the release stresses of a plastic part.
- the absorbent material molded in the form of the housing 11 and its ribs 22 is cross-linked polyurethane foam of low density.
- the density of the material is less than 10Og / l and can be in a range between 15 and 100 g / l. In this way, the flexibility of the material facilitates its mounting around the body and the ribs 22 and its sound absorption properties are preserved.
- the protective envelope comprises cutting zones essentially around the zones of the body of the air filter having an outgrowth with respect to the surface of the body of the air filter in order to facilitate the introduction of said protective envelope around the air filter.
- the said zones are, for example, those of the connecting elements or those of the connections of the air ducts.
- a cutting operation of the protective envelope in these cutting zones may be provided before placing said protective envelope around the body of the air filter, so that the edges of the cutting area conform to the boundary between the protective envelope and areas where growths are present.
- the protective envelope may be bell-shaped and may be in one piece by molding.
- the protective envelope of absorbent material is obtained by molding in two pieces to cover separately the body and the body. the other side of the air filter cover.
- the protective envelope is kept pressed against the outer wall of the air filter by means of rapid and reversible fixing means.
- Said means are for example pins which pass through said envelope to be driven into fixing holes dug in the wall of the air filter.
- Management of the shapes and material of the acoustic protection envelope provides an envelope of absorbent material whose outer surface is maintained in the available volume around the air filter.
- the acoustic protection envelope 30 formed with an acoustic absorbent, resulting from molding and then fixed in a simple and reversible manner by surrounding the air filter allows on the one hand to absorb the noise generated by the filter to air and on the other hand to reduce the propagation of operating noise of the engine.
- the invention is not limited to the embodiments of this plug, described above as examples, it encompasses all variants.
- the rapid and reversible attachment means may be different from that presented.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Analytical Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1852194A FR3079001B1 (fr) | 2018-03-14 | 2018-03-14 | Filtre a air avec protection acoustique |
| PCT/EP2019/056452 WO2019175329A1 (fr) | 2018-03-14 | 2019-03-14 | Filtre a air avec protection acoustique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3765727A1 true EP3765727A1 (fr) | 2021-01-20 |
Family
ID=62455697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19709527.6A Withdrawn EP3765727A1 (fr) | 2018-03-14 | 2019-03-14 | Filtre a air avec protection acoustique |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3765727A1 (fr) |
| CN (1) | CN112005004B (fr) |
| FR (1) | FR3079001B1 (fr) |
| WO (1) | WO2019175329A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3118736B1 (fr) | 2021-01-11 | 2023-03-10 | Renault Sas | Protecteur acoustique à fixation rapide. |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6411359U (fr) * | 1987-07-09 | 1989-01-20 | ||
| DE3735880A1 (de) * | 1987-10-23 | 1989-05-03 | Phoenix Ag | Schlauch mit geraeuschmindernder zusatzmasse |
| DE4306397B4 (de) * | 1992-03-14 | 2004-07-29 | Volkswagen Ag | Schalldämpfer für ein strömendes gasförmiges Medium, insbesondere Verbrennungsluft einer Brennkraftmaschine |
| TW366388B (en) * | 1997-08-13 | 1999-08-11 | Honda Motor Co Ltd | Intake silencer system |
| US6598581B2 (en) * | 2001-12-13 | 2003-07-29 | Visteon Global Technologies, Inc. | Metallic coating on a component of an internal combustion engine |
| US9404451B2 (en) * | 2014-04-11 | 2016-08-02 | GM Global Technology Operations LLC | Automotive air cleaner elements with attachment/insulation feature |
| CN204783373U (zh) * | 2015-07-03 | 2015-11-18 | 力帆实业(集团)股份有限公司 | 车辆进气消音装置 |
| JP6642253B2 (ja) * | 2016-05-09 | 2020-02-05 | トヨタ紡織株式会社 | 内燃機関のエアクリーナ |
| DE102016011774A1 (de) * | 2016-10-04 | 2018-04-05 | Mann + Hummel Gmbh | Filtersystem mit einem lsolierkörper, lsolierkörper und Verfahren zum Herstellen eines lsolierkörpers |
-
2018
- 2018-03-14 FR FR1852194A patent/FR3079001B1/fr active Active
-
2019
- 2019-03-14 EP EP19709527.6A patent/EP3765727A1/fr not_active Withdrawn
- 2019-03-14 CN CN201980027209.8A patent/CN112005004B/zh active Active
- 2019-03-14 WO PCT/EP2019/056452 patent/WO2019175329A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3079001A1 (fr) | 2019-09-20 |
| FR3079001B1 (fr) | 2021-01-08 |
| CN112005004A (zh) | 2020-11-27 |
| CN112005004B (zh) | 2022-06-07 |
| WO2019175329A1 (fr) | 2019-09-19 |
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