FR2913805A1 - Acoustic protection screen for motor vehicle, has absorbent layer with resistance higher than specific value when layer is compressed to specific value in its thickness at uncompressed state for ensuring sealing between flange and screen - Google Patents

Acoustic protection screen for motor vehicle, has absorbent layer with resistance higher than specific value when layer is compressed to specific value in its thickness at uncompressed state for ensuring sealing between flange and screen Download PDF

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Publication number
FR2913805A1
FR2913805A1 FR0701880A FR0701880A FR2913805A1 FR 2913805 A1 FR2913805 A1 FR 2913805A1 FR 0701880 A FR0701880 A FR 0701880A FR 0701880 A FR0701880 A FR 0701880A FR 2913805 A1 FR2913805 A1 FR 2913805A1
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France
Prior art keywords
layer
screen
absorbent layer
specific value
compressed
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Granted
Application number
FR0701880A
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French (fr)
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FR2913805B1 (en
Inventor
Guillaume Crignon
Andre Xavier Bayle
Jean Christophe Stein
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Centre dEtude et de Recherche pour lAutomobile CERA
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Centre dEtude et de Recherche pour lAutomobile CERA
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Priority to FR0701880A priority Critical patent/FR2913805B1/en
Publication of FR2913805A1 publication Critical patent/FR2913805A1/en
Application granted granted Critical
Publication of FR2913805B1 publication Critical patent/FR2913805B1/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Abstract

The screen (1) has a compressible absorbent layer (2), a sealed layer (3) and an elastic layer (4) superposed with respect to one another, where the layer (2) is made of split foam e.g. polyurethane foam and propylene diene monomer foam. The layer (2) has resistance against air passage, where the resistance is higher than 5000 Newton second per meter when the layer (2) is compressed from 30 to 60 percentages in its thickness at an uncompressed state for ensuring sealing between a flange (7) and the screen. An independent claim is also included for a steering column assembling architecture comprising a cross section orifice.

Description

1 L'invention concerne un écran de protection acoustique pour véhicule1 The invention relates to an acoustic protection screen for a vehicle

automobile et une architecture de montage d'un organe à travers un tel écran. automobile and an architecture for mounting an organ through such a screen.

Il est connu de réaliser un écran de protection acoustique pour véhicule automobile, ledit écran comprenant, superposées l'une sur l'autre, une couche absorbante compressible, une couche étanche et une couche élastique, de sorte à former un système isolant de type masse ressort présentant des propriétés d'absorption. It is known to produce an acoustic protection screen for a motor vehicle, said screen comprising, superimposed one on the other, a compressible absorbent layer, a waterproof layer and an elastic layer, so as to form an insulating system of mass type. spring exhibiting absorption properties.

Cie tels écrans sont généralement traversés par des organes, tels qu'une colonne de direction, au travers d'orifices prévus à cet effet. Cie such screens are generally traversed by members, such as a steering column, through orifices provided for this purpose.

Afin de minimiser les fuites acoustiques, il est souvent nécessaire de rapporter un joint entre l'organe et l'orifice, ce qui complexifie la fabrication du véhicule. L'invention a pour but de pallier cet inconvénient. In order to minimize acoustic leaks, it is often necessary to add a seal between the component and the orifice, which complicates the manufacture of the vehicle. The object of the invention is to overcome this drawback.

A cet effet, et selon un premier aspect, l'invention propose un écran de protection acoustique pour véhicule automobile, ledit écran comprenant, 20 superposées l'une sur l'autre, une couche absorbante compressible, une couche étanche et une couche élastique, ladite couche absorbante présentant une résistance au passage de l'air supérieure à 5000 N.s.m-3 lorsqu'elle est comprimée de 30% à 60%, et notamment de 30 à 40%, de son épaisseur à l'état non comprimé, de sorte à être sensiblement étanche. :25 Selon un deuxième aspect, l'invention propose une architecture de montage d'un organe à travers un tel écran, un orifice de section correspondant à celle dudit organe étant réalisé dans ledit écran, ledit organe comprenant une colerette disposée du côté de la couche absorbante et la comprimant de 30% à :30 60%, et notamment de 30 à 40%, de sorte à réaliser sensiblement une étanchéité entre ladite colerette et ledit écran.15 2 Un tel agencement permet d'éviter l'utilisation d'un joint d'étanchéité, les propriétés d'étanchéité de la couche absorbante comprimée étant mises à profit pour réaliser l'étanchéité attendue. To this end, and according to a first aspect, the invention provides an acoustic protection screen for a motor vehicle, said screen comprising, superimposed one on the other, a compressible absorbent layer, a waterproof layer and an elastic layer, said absorbent layer having a resistance to the passage of air greater than 5000 Nsm-3 when it is compressed from 30% to 60%, and in particular from 30 to 40%, of its thickness in the uncompressed state, so to be substantially waterproof. : 25 According to a second aspect, the invention proposes an architecture for mounting a member through such a screen, an orifice of section corresponding to that of said member being produced in said screen, said member comprising a collar arranged on the side of the absorbent layer and compressing it from 30% to: 30 to 60%, and in particular from 30 to 40%, so as to substantially achieve a seal between said collar and said screen. 2 Such an arrangement makes it possible to avoid the use of a seal, the sealing properties of the compressed absorbent layer being used to achieve the expected seal.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence à la figure jointe qui est une représentation schématique partielle en coupe d'une architecture de montage d'un organe à travers un écran selon un mode de réalisation. Other features and advantages of the invention will become apparent in the description which follows, made with reference to the attached figure which is a partial schematic representation in section of an architecture for mounting an organ through a screen according to a mode of operation. production.

En référence à la figure, on décrit un écran 1 de protection acoustique pour véhicule automobile, ledit écran comprenant, superposées l'une sur l'autre, une couche absorbante 2 compressible, une couche étanche 3 et une couche élastique 4, de sorte à former un système isolant de type masse ressort présentant des caractéristiques d'absorption, ladite couche absorbante présentant une résistance au passage de l'air supérieure à 5000 N.s.m-3 lorsqu'elle est comprimée de 30% à 60% de son épaisseur à l'état non comprimé, de sorte à être sensiblement étanche. With reference to the figure, an acoustic protection screen 1 for a motor vehicle is described, said screen comprising, superimposed one on top of the other, a compressible absorbent layer 2, a waterproof layer 3 and an elastic layer 4, so as to forming a spring mass-like insulating system exhibiting absorption characteristics, said absorbent layer exhibiting an air resistance greater than 5000 Nsm-3 when compressed from 30% to 60% of its thickness at the uncompressed state, so as to be substantially sealed.

Pour être plus précis, à titre d'illustration, une couche d'épaisseur 100 :20 comprimée de 30% voit son épaisseur réduite à 70. To be more precise, by way of illustration, a layer of thickness 100:20 compressed by 30% sees its thickness reduced to 70.

Selon une réalisation, la couche absorbante 2 présente une résistance au passage de l'air inférieure à 3000 N.s.m-3 à l'état non comprimé, de sorte à présenter une porosité à l'air. Selon une réalisation, la couche absorbante 2 présente une résistance au passage de l'air supérieure à 5000 N.s.m-3 lorsqu'elle est comprimée de 30% à 40%. According to one embodiment, the absorbent layer 2 has a resistance to the passage of air of less than 3000 N.s.m-3 in the uncompressed state, so as to have a porosity to air. According to one embodiment, the absorbent layer 2 has a resistance to the passage of air of greater than 5000 N.s.m-3 when it is compressed by 30% to 40%.

30 Selon une réalisation, la couche absorbante 2 est à base de mousse refendue. Selon une réalisation, la mousse refendue est à base de polyuréthanne. :25 3 Selon une réalisation, la mousse refendue est à base d'éthylène propylène diène monomère (EPDM), par exemple de type NITTO O N 687, à cellules semi fermées. According to one embodiment, the absorbent layer 2 is based on split foam. According to one embodiment, the split foam is based on polyurethane. : 25 3 According to one embodiment, the split foam is based on ethylene propylene diene monomer (EPDM), for example of the NITTO O N 687 type, with semi-closed cells.

Selon une réalisation, la couche élastique 4 est à base de mousse, notamment de polyuréthanne, surmoulant la couche absorbante 2, la couche étanche 3 étant formée par imprégnation de ladite couche absorbante, sur une fraction de son épaisseur, par ladite mousse. According to one embodiment, the elastic layer 4 is based on foam, in particular on polyurethane, overmolding the absorbent layer 2, the waterproof layer 3 being formed by impregnation of said absorbent layer, over a fraction of its thickness, by said foam.

Io Selon une réalisation, la couche absorbante 2 et/ou étanche 3 s'étend sur une fraction de la surface de la couche élastique 4. Io According to one embodiment, the absorbent 2 and / or waterproof layer 3 extends over a fraction of the surface of the elastic layer 4.

Dans l'architecture de montage représentée sur la figure, un orifice 5 de section correspondant à celle d'un organe 6 est réalisé dans l'écran 1, ledit organe 15 comprenant une colerette 7 disposée du côté de la couche absorbante 2 et la comprimant de 30% à 60%, de sorte à réaliser sensiblement une étanchéité entre ladite colerette et ledit écran. In the assembly architecture shown in the figure, an orifice 5 of section corresponding to that of a member 6 is made in the screen 1, said member 15 comprising a collar 7 disposed on the side of the absorbent layer 2 and compressing it. from 30% to 60%, so as to substantially achieve a seal between said collar and said screen.

Selon une réalisation, la colerette 7 comprime la couche absorbante de 30% à 20 40%. According to one embodiment, the collar 7 compresses the absorbent layer from 30% to 40%.

Claims (10)

REVENDICATIONS 1. Ecran (1) de protection acoustique pour véhicule automobile, ledit écran comprenant, superposées l'une sur l'autre, une couche absorbante (2) compressible, une couche étanche (3) et une couche élastique (4), ledit écran étant caractérisé en ce que ladite couche absorbante présente une résistance au passage de l'air supérieure à 5000 N.s.m-3lorsqu'elle est comprimée de 30% à 60% de son épaisseur à l'état non comprimé, de sorte à être sensiblement ~o étanche. 1. Screen (1) for acoustic protection for a motor vehicle, said screen comprising, superimposed one on top of the other, a compressible absorbent layer (2), a waterproof layer (3) and an elastic layer (4), said screen being characterized in that said absorbent layer has a resistance to the passage of air greater than 5000 Nsm-3 when it is compressed from 30% to 60% of its thickness in the uncompressed state, so as to be substantially ~ o waterproof. 2. Ecran selon la revendication 1, la couche absorbante (2) présentant une résistance au passage de l'air inférieure à 3000 N.s.m"3 à l'état non comprimé. 15 2. Screen according to claim 1, the absorbent layer (2) having a resistance to the passage of air of less than 3000 N.s.m -3 in the uncompressed state. 3. Ecran selon la revendication 1 ou 2, la couche absorbante (2) présentant une résistance au passage de l'air supérieure à 5000 N.s.m-3 lorsqu'elle est comprimée de 30% à 40%. 3. Screen according to claim 1 or 2, the absorbent layer (2) having a resistance to the passage of air greater than 5000 N.s.m-3 when it is compressed from 30% to 40%. 4. Ecran selon l'une quelconque des revendications 1 à 3, la couche 20 absorbante (2) étant à base de mousse refendue. 4. Screen according to any one of claims 1 to 3, the absorbent layer (2) being based on split foam. 5. Ecran selon la revendication 4, la mousse refendue étant à base de polyuréthanne. 25 5. Screen according to claim 4, the split foam being based on polyurethane. 25 6. Ecran selon la revendication 4, la mousse refendue étant à base d'éthylène propylène diène monomère. 6. Screen according to claim 4, the slit foam being based on ethylene propylene diene monomer. 7. Ecran selon l'une quelconque des revendications 1 à 6, la couche élastique (4) étant à base de mousse surmoulant la couche absorbante (2), la couche 30 étanche (3) étant formée par imprégnation de ladite couche absorbante, sur une fraction de son épaisseur, par ladite mousse. 7. Screen according to any one of claims 1 to 6, the elastic layer (4) being based on foam overmolding the absorbent layer (2), the waterproof layer (3) being formed by impregnation of said absorbent layer, on a fraction of its thickness, by said foam. 8. Ecran selon l'une quelconque des revendications 1 à 7, la couche absorbante (2) et/ou étanche (3) s'étendant sur une fraction de la surface de la couche élastique (4). 5 8. Screen according to any one of claims 1 to 7, the absorbent layer (2) and / or waterproof (3) extending over a fraction of the surface of the elastic layer (4). 5 9. Architecture de montage d'un organe à travers un écran selon l'une quelconque des revendications 1 à 8, un orifice (5) de section correspondant à celle dudit organe étant réalisé dans ledit écran, ledit organe comprenant une colerette (7) disposée du côté de la couche absorbante (2) et la comprimant de 30% à 60%, de sorte à réaliser sensiblement une étanchéité entre ladite 7o colerette et ledit écran. 9. Architecture for mounting a member through a screen according to any one of claims 1 to 8, an orifice (5) of section corresponding to that of said member being produced in said screen, said member comprising a collar (7). disposed on the side of the absorbent layer (2) and compressing it by 30% to 60%, so as to substantially achieve a seal between said collar and said screen. 10. Architecture selon la revendication 9, quand elle dépend de la revendication 3, la colerette (7) comprimant la couche absorbante (2) de 30% à 40%. 10. Architecture according to claim 9, when it depends on claim 3, the collar (7) compressing the absorbent layer (2) from 30% to 40%.
FR0701880A 2007-03-15 2007-03-15 ACOUSTIC PROTECTION SCREEN FOR A MOTOR VEHICLE, COMPRISING A COMPRESSION-SEALED ABSORBENT LAYER Expired - Fee Related FR2913805B1 (en)

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FR0701880A FR2913805B1 (en) 2007-03-15 2007-03-15 ACOUSTIC PROTECTION SCREEN FOR A MOTOR VEHICLE, COMPRISING A COMPRESSION-SEALED ABSORBENT LAYER

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FR0701880A FR2913805B1 (en) 2007-03-15 2007-03-15 ACOUSTIC PROTECTION SCREEN FOR A MOTOR VEHICLE, COMPRISING A COMPRESSION-SEALED ABSORBENT LAYER

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FR2913805A1 true FR2913805A1 (en) 2008-09-19
FR2913805B1 FR2913805B1 (en) 2012-12-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160129855A1 (en) * 2014-11-06 2016-05-12 Cadillac Products Automotive Company Acoustic barrier assembly with acoustic seal and method of manufacturing the same
CN105584434A (en) * 2014-11-06 2016-05-18 凯迪拉克汽车公司 Sound insulation assembly with sound sealing function and manufacturing method thereof
FR3092538A1 (en) * 2019-02-12 2020-08-14 Treves Products, Services & Innovation Acoustic protection screen for motor vehicle engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998018657A1 (en) * 1996-10-29 1998-05-07 Rieter Automotive (International ) Ag Ultralight, multifunctional sound-insulating kit
US6296075B1 (en) * 2000-06-02 2001-10-02 Lear Corporation Lightweight acoustical system
FR2835955A1 (en) * 2002-02-11 2003-08-15 Sai Automotive Sommer Ind SOUNDPROOFING ASSEMBLY AND ROOM COMPRISING A WALL COVERED BY SAID ASSEMBLY
FR2859477A1 (en) * 2003-09-10 2005-03-11 Cera Soundproofing material for motor vehicle trim components has dense layer formed by thermoplastic material applied in powder form and jeated
WO2006007276A1 (en) * 2004-07-01 2006-01-19 3M Innovative Properties Company Sound absorptive multilayer composite
GB2419831A (en) * 2004-11-09 2006-05-10 Lear Corp Acoustic insulator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998018657A1 (en) * 1996-10-29 1998-05-07 Rieter Automotive (International ) Ag Ultralight, multifunctional sound-insulating kit
US6296075B1 (en) * 2000-06-02 2001-10-02 Lear Corporation Lightweight acoustical system
FR2835955A1 (en) * 2002-02-11 2003-08-15 Sai Automotive Sommer Ind SOUNDPROOFING ASSEMBLY AND ROOM COMPRISING A WALL COVERED BY SAID ASSEMBLY
FR2859477A1 (en) * 2003-09-10 2005-03-11 Cera Soundproofing material for motor vehicle trim components has dense layer formed by thermoplastic material applied in powder form and jeated
WO2006007276A1 (en) * 2004-07-01 2006-01-19 3M Innovative Properties Company Sound absorptive multilayer composite
GB2419831A (en) * 2004-11-09 2006-05-10 Lear Corp Acoustic insulator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160129855A1 (en) * 2014-11-06 2016-05-12 Cadillac Products Automotive Company Acoustic barrier assembly with acoustic seal and method of manufacturing the same
CN105584434A (en) * 2014-11-06 2016-05-18 凯迪拉克汽车公司 Sound insulation assembly with sound sealing function and manufacturing method thereof
US9908485B2 (en) * 2014-11-06 2018-03-06 Cadillac Products Automotive Company Acoustic barrier assembly with acoustic seal
CN105584434B (en) * 2014-11-06 2018-11-30 凯迪拉克汽车公司 Soundproofing member and its manufacturing method with acoustic seal
FR3092538A1 (en) * 2019-02-12 2020-08-14 Treves Products, Services & Innovation Acoustic protection screen for motor vehicle engine

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