EP2780199A1 - Thin acoustic protection device intended to be installed against a wall of an electric motor casing for a motor vehicle - Google Patents

Thin acoustic protection device intended to be installed against a wall of an electric motor casing for a motor vehicle

Info

Publication number
EP2780199A1
EP2780199A1 EP12795552.4A EP12795552A EP2780199A1 EP 2780199 A1 EP2780199 A1 EP 2780199A1 EP 12795552 A EP12795552 A EP 12795552A EP 2780199 A1 EP2780199 A1 EP 2780199A1
Authority
EP
European Patent Office
Prior art keywords
layer
foam layer
face
wall
electric motor
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Withdrawn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
EP12795552.4A
Other languages
German (de)
French (fr)
Inventor
David DREZET
Christophe CAPRON
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.)
Centre dEtude et de Recherche pour lAutomobile CERA
Original Assignee
Centre dEtude et de Recherche pour lAutomobile CERA
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 Centre dEtude et de Recherche pour lAutomobile CERA filed Critical Centre dEtude et de Recherche pour lAutomobile CERA
Publication of EP2780199A1 publication Critical patent/EP2780199A1/en
Withdrawn legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation

Definitions

  • the invention relates to a thin acoustic protection device intended to be disposed against a motor vehicle electric motor housing wall and a mounting architecture of such a device.
  • Such devices have the drawback of generally having a large thickness, for example of the order of 20 mm, which may be incompatible with the space provided around the engine.
  • the aim of the invention is to overcome this drawback by proposing a thin acoustic protection device which nevertheless has a high degree of efficiency.
  • the invention proposes a thin acoustic protection device intended to be arranged against a motor vehicle electric motor housing wall, said device being in the form of a complex comprising:
  • a layer of compressible foam comprising a first and a second face respectively provided with an adhesive, said layer having a thickness of between 0.5 and 2 mm,
  • the presence of adhesive on the second face allows the attachment of the device on a wall that can be inclined relative to the horizontal, vertical or downward.
  • the electric motor to be protected is either a main motor of an electric vehicle or an auxiliary motor of an electric or thermal vehicle.
  • the invention proposes an architecture for mounting such a device.
  • a thin acoustic protection device 1 intended to be arranged against a motor vehicle electric motor housing wall, said device being in the form of a complex comprising: A layer of compressible foam 2 comprising a first 3 and a second 4 face respectively provided with an adhesive, said layer having a thickness of between 0.5 and 2 mm,
  • elastomer material - for example an ethylene propylene diene monomer loaded with mineral filler - with a surface mass of between 3.5 and 7 kg / m 2 and a thickness of between 1 and 4 mm, said layer being associated with said first face.
  • the adhesive may be arranged in continuous or discontinuous form, for example by dots.
  • the device 1 further comprises a protective layer 6 - for example based on a nonwoven with a mass per unit area close to 100 g / m 2 and treated with anti-fire and hydrophobic - associated against the face of the heavy layer Opposed to the foam layer 2.
  • the foam layer 2 is based on acrylic, which gives it a viscoelastic character.
  • the foam may especially be that proposed by the company 3M under the reference PT1 100.
  • the foam layer 2 has a density of between 400 and 700 g / l, and especially between 500 and 600 g / l.
  • the device 1 further comprises a removable protective film 7 disposed against the second face 4 of the foam layer 2, said film being removed to associate said device to the housing wall.
  • the device 1 is in planar form, so as to be associated with a flat wall or developable geometry.
  • a mounting architecture of a device 1 said architecture comprising said device and a wall, not shown, of motor housing, said device being bonded against said wall along substantially the entire surface of the second face 4 of the foam layer 2.
  • the veneer made between the device 1 and the wall makes it possible to limit the acoustic radiation.
  • the casing wall is partially covered by at least one device 1 disposed locally in a casing area of high sound emission.
  • the housing wall is covered by several devices 1 located in a plurality of areas of high noise emission.

Abstract

The invention relates to a thin acoustic protection device (1) intended to be installed against a wall of an electric motor casing for a motor vehicle, said device being in the form of a complex comprising: a layer of compressible foam (2) comprising a first (3) and a second (4) face, each having an adhesive, said layer having a thickness in the range of 0.5 to 2 mm, a heavy layer (5) made of an elastomer material with an area density in the range of 3.5 to 7 kg/m2 and with a thickness in the range of 2 to 4 mm, said layer being associated with said first face.

Description

PROTECTION ACOUSTIQUE MINCE DE PAROI DE CARTER DE MOTEUR ELECTRIQUE POUR VEHICULE AUTOMOBILE  THIN ACOUSTIC PROTECTION OF ELECTRIC MOTOR CASTER WALL FOR MOTOR VEHICLE
L'invention concerne un dispositif mince de protection acoustique destiné à être disposé contre une paroi de carter de moteur électrique pour véhicule automobile et une architecture de montage d'un tel dispositif. The invention relates to a thin acoustic protection device intended to be disposed against a motor vehicle electric motor housing wall and a mounting architecture of such a device.
Il est connu de réaliser une protection acoustique d'un moteur de véhicule automobile par application autour dudit moteur d'un ou plusieurs panneaux poreux ou comprenant une couche de matériau lourd disposé sur une couche élastique formant ressort, de manière à réaliser un système de type « masse- ressort ». It is known to provide acoustic protection of a motor vehicle engine by application around said motor of one or more porous panels or comprising a layer of heavy material disposed on a resilient layer forming a spring, so as to achieve a system of type "Mass-spring".
De tels dispositifs ont l'inconvénient de présenter généralement une épaisseur importante, par exemple de l'ordre de 20 mm, ce qui peut s'avérer incompatible avec l'espace prévu autour du moteur. Such devices have the drawback of generally having a large thickness, for example of the order of 20 mm, which may be incompatible with the space provided around the engine.
L'invention a pour but de pallier cet inconvénient en proposant un dispositif de protection acoustique mince et présentant néanmoins une grande efficacité. The aim of the invention is to overcome this drawback by proposing a thin acoustic protection device which nevertheless has a high degree of efficiency.
A cet effet, et selon un premier aspect, l'invention propose un dispositif mince de protection acoustique destiné à être disposé contre une paroi de carter de moteur électrique pour véhicule automobile, ledit dispositif étant sous forme d'un complexe comprenant : For this purpose, and according to a first aspect, the invention proposes a thin acoustic protection device intended to be arranged against a motor vehicle electric motor housing wall, said device being in the form of a complex comprising:
· une couche de mousse compressible comprenant une première et une deuxième face respectivement pourvues d'un adhésif, ladite couche présentant une épaisseur comprise entre 0,5 et 2 mm,  A layer of compressible foam comprising a first and a second face respectively provided with an adhesive, said layer having a thickness of between 0.5 and 2 mm,
• une couche lourde à base de matériau élastomère de masse surfacique comprise entre 3,5 et 7 kg/m2 et d'épaisseur comprise entre 1 et 4 mm, ladite couche étant associée à ladite première face. Avec l'agencement proposé, on dispose d'un dispositif d'épaisseur maximale de l'ordre de 6 mm, ce qui permet de le localiser dans des endroits où l'on dispose de peu de place. L'adhésif de la première face permet l'association de la couche de mousse avec la couche lourde. A heavy layer based on an elastomer material having a surface mass of between 3.5 and 7 kg / m 2 and a thickness of between 1 and 4 mm, said layer being associated with said first face. With the proposed arrangement, there is a device of maximum thickness of the order of 6 mm, which allows to locate it in places where there is little space. The adhesive of the first face allows the association of the foam layer with the heavy layer.
La présence d'adhésif sur la deuxième face permet la fixation du dispositif sur une paroi qui peut être inclinée par rapport à l'horizontale, verticale ou orientée vers le bas. The presence of adhesive on the second face allows the attachment of the device on a wall that can be inclined relative to the horizontal, vertical or downward.
En outre, un tel dispositif permet de faire une protection localisée, selon un principe de patch, sur une zone de paroi particulièrement émissive en bruit. Le moteur électrique à protéger est soit un moteur principal de véhicule électrique soit un moteur auxiliaire d'un véhicule électrique ou thermique. In addition, such a device makes it possible to provide localized protection, according to a patch principle, on a particularly noise-emissive wall zone. The electric motor to be protected is either a main motor of an electric vehicle or an auxiliary motor of an electric or thermal vehicle.
Il est typiquement observé, par l'utilisation d'un tel dispositif, une diminution des nuisances sonores de 2 à 3 dB. It is typically observed, by the use of such a device, a decrease in noise from 2 to 3 dB.
Selon un deuxième aspect, l'invention propose une architecture de montage d'un tel dispositif. According to a second aspect, the invention proposes an architecture for mounting such a device.
D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence à la figure jointe qui est une vue schématique en coupe d'un dispositif selon une réalisation. Other features and advantages of the invention will appear in the description which follows, with reference to the attached figure which is a schematic sectional view of a device according to one embodiment.
En référence à la figure, on décrit un dispositif 1 mince de protection acoustique destiné à être disposé contre une paroi de carter de moteur électrique pour véhicule automobile, ledit dispositif étant sous forme d'un complexe comprenant : • une couche de mousse 2 compressible comprenant une première 3 et une deuxième 4 face respectivement pourvues d'un adhésif, ladite couche présentant une épaisseur comprise entre 0,5 et 2 mm, Referring to the figure, there is described a thin acoustic protection device 1 intended to be arranged against a motor vehicle electric motor housing wall, said device being in the form of a complex comprising: A layer of compressible foam 2 comprising a first 3 and a second 4 face respectively provided with an adhesive, said layer having a thickness of between 0.5 and 2 mm,
• une couche lourde 5 à base de matériau élastomère - par exemple un éthylène propylène diène monomère chargé en charge minérale - de masse surfacique comprise entre 3,5 et 7 kg/m2 et d'épaisseur comprise entre 1 et 4 mm, ladite couche étant associée à ladite première face. A heavy layer 5 based on elastomer material - for example an ethylene propylene diene monomer loaded with mineral filler - with a surface mass of between 3.5 and 7 kg / m 2 and a thickness of between 1 and 4 mm, said layer being associated with said first face.
L'adhésif peut être disposé sous forme continue ou discontinue, par exemple par points. The adhesive may be arranged in continuous or discontinuous form, for example by dots.
Selon la réalisation représentée, le dispositif 1 comprend en outre une couche de protection 6 - par exemple à base de non tissé de masse surfacique voisine de 100 g/m2 et traité anti-feu et hydrophobe - associée contre la face de la couche lourde 5 opposée à la couche de mousse 2. According to the embodiment shown, the device 1 further comprises a protective layer 6 - for example based on a nonwoven with a mass per unit area close to 100 g / m 2 and treated with anti-fire and hydrophobic - associated against the face of the heavy layer Opposed to the foam layer 2.
Selon une réalisation, la couche de mousse 2 est à base d'acrylique, ce qui lui confère un caractère viscoélastique. La mousse peut notamment être celle proposée par la société 3M sous la référence PT1 100. In one embodiment, the foam layer 2 is based on acrylic, which gives it a viscoelastic character. The foam may especially be that proposed by the company 3M under the reference PT1 100.
Selon une réalisation, la couche de mousse 2 présente une masse volumique comprise entre 400 et 700 g/l, et notamment entre 500 et 600 g/l. According to one embodiment, the foam layer 2 has a density of between 400 and 700 g / l, and especially between 500 and 600 g / l.
Avec une densité aussi importante de la couche de mousse 2, combinée à sa faible épaisseur, la réduction du bruit se fait en grande partie par amortissement. Selon une réalisation, la pression nécessaire pour la comprimer de 50% est comprise entre 0,6 et 1 MPa, étant notamment de l'ordre de 0,8 MPa. Selon la réalisation représentée, le dispositif 1 comprend en outre un film de protection 7 amovible disposé contre la deuxième face 4 de la couche de mousse 2, ledit film étant enlevé pour associer ledit dispositif à la paroi de carter. With such a high density of the foam layer 2, combined with its small thickness, the noise reduction is largely damped. According to one embodiment, the pressure necessary to compress it by 50% is between 0.6 and 1 MPa, being in particular of the order of 0.8 MPa. According to the embodiment shown, the device 1 further comprises a removable protective film 7 disposed against the second face 4 of the foam layer 2, said film being removed to associate said device to the housing wall.
Selon la réalisation représentée, le dispositif 1 se présente sous forme plane, de manière à être associé à une paroi plane ou de géométrie développable. According to the embodiment shown, the device 1 is in planar form, so as to be associated with a flat wall or developable geometry.
On décrit à présent une architecture de montage d'un dispositif 1 , ladite architecture comprenant ledit dispositif et une paroi, non représentée, de carter de moteur, ledit dispositif étant collé contre ladite paroi selon sensiblement toute la surface de la deuxième face 4 de la couche de mousse 2. We now describe a mounting architecture of a device 1, said architecture comprising said device and a wall, not shown, of motor housing, said device being bonded against said wall along substantially the entire surface of the second face 4 of the foam layer 2.
Le placage réalisé entre le dispositif 1 et la paroi permet de limiter le rayonnement acoustique. The veneer made between the device 1 and the wall makes it possible to limit the acoustic radiation.
Selon une réalisation, la paroi de carter est partiellement recouverte par au moins un dispositif 1 disposé localement dans une zone de carter de forte émission sonore. According to one embodiment, the casing wall is partially covered by at least one device 1 disposed locally in a casing area of high sound emission.
On peut aussi prévoir que la paroi de carter soit recouverte par plusieurs dispositifs 1 localisés dans une pluralité de zones de forte émission sonore. It is also possible that the housing wall is covered by several devices 1 located in a plurality of areas of high noise emission.

Claims

REVENDICATIONS
1 . Dispositif (1 ) mince de protection acoustique destiné à être disposé contre une paroi de carter de moteur électrique pour véhicule automobile, ledit dispositif étant sous forme d'un complexe comprenant : 1. Thin acoustic protection device (1) intended to be arranged against a motor vehicle electric motor housing wall, said device being in the form of a complex comprising:
• une couche de mousse (2) compressible comprenant une première (3) et une deuxième (4) face respectivement pourvues d'un adhésif, ladite couche présentant une épaisseur comprise entre 0,5 et 2 mm,  A compressible foam layer (2) comprising a first (3) and a second (4) face respectively provided with an adhesive, said layer having a thickness of between 0.5 and 2 mm,
· une couche lourde (5) à base de matériau élastomère de masse surfacique comprise entre 3,5 et 7 kg/m2 et d'épaisseur comprise entre 2 et 4 mm, ladite couche étant associée à ladite première face. A heavy layer (5) based on an elastomer material having a surface mass of between 3.5 and 7 kg / m 2 and a thickness of between 2 and 4 mm, said layer being associated with said first face.
2. Dispositif selon la revendication 1 , caractérisé en ce qu'il comprend en outre une couche de protection (6) associée contre la face de la couche lourde2. Device according to claim 1, characterized in that it further comprises a protective layer (6) associated against the face of the heavy layer
(5) opposée à la couche de mousse (2). (5) opposite to the foam layer (2).
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la couche de mousse (2) est à base d'acrylique. 3. Device according to claim 1 or 2, characterized in that the foam layer (2) is based on acrylic.
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la couche de mousse (2) présente une masse volumique comprise entre 400 et 700 g/l, et notamment entre 500 et 600 g/l. 4. Device according to any one of claims 1 to 3, characterized in that the foam layer (2) has a density of between 400 and 700 g / l, and especially between 500 and 600 g / l.
5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la couche de mousse (2) présente un module de compression tel que la pression nécessaire pour la comprimer de 50% est comprise entre 0,6 et 1 MPa, étant notamment de l'ordre de 0,8 MPa. 5. Device according to any one of claims 1 to 4, characterized in that the foam layer (2) has a compression module such that the pressure necessary to compress it by 50% is between 0.6 and 1 MPa , being in particular of the order of 0.8 MPa.
6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il se présente sous forme plane. 6. Device according to any one of claims 1 to 5, characterized in that it is in planar form.
7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend en outre un film de protection (7) amovible disposé contre la deuxième face de la couche de mousse. 7. Device according to any one of claims 1 to 6, characterized in that it further comprises a removable protective film (7) disposed against the second side of the foam layer.
8. Architecture de montage d'un dispositif selon l'une quelconque des revendications 1 à 6, ladite architecture comprenant ledit dispositif et une paroi de carter de moteur, ledit dispositif étant collé contre ladite paroi selon sensiblement toute la surface de la deuxième face (4) de la couche de mousse (2). 8. Mounting architecture of a device according to any one of claims 1 to 6, said architecture comprising said device and a motor housing wall, said device being bonded against said wall along substantially the entire surface of the second face ( 4) the foam layer (2).
9. Architecture selon la revendication 8, caractérisée en ce que la paroi de carter est partiellement recouverte par au moins un dispositif (1 ) disposé localement dans une zone de carter de forte émission sonore. 9. Architecture according to claim 8, characterized in that the housing wall is partially covered by at least one device (1) disposed locally in a housing area of high noise emission.
EP12795552.4A 2011-11-14 2012-11-14 Thin acoustic protection device intended to be installed against a wall of an electric motor casing for a motor vehicle Withdrawn EP2780199A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1160336A FR2982559B1 (en) 2011-11-14 2011-11-14 THIN-PROTECTIVE DEVICE FOR ACOUSTIC PROTECTION TO BE PROVIDED AGAINST AN ELECTRIC MOTOR HOUSING WALL FOR A MOTOR VEHICLE
PCT/FR2012/052632 WO2013072629A1 (en) 2011-11-14 2012-11-14 Thin acoustic protection device intended to be installed against a wall of an electric motor casing for a motor vehicle

Publications (1)

Publication Number Publication Date
EP2780199A1 true EP2780199A1 (en) 2014-09-24

Family

ID=47291146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12795552.4A Withdrawn EP2780199A1 (en) 2011-11-14 2012-11-14 Thin acoustic protection device intended to be installed against a wall of an electric motor casing for a motor vehicle

Country Status (3)

Country Link
EP (1) EP2780199A1 (en)
FR (1) FR2982559B1 (en)
WO (1) WO2013072629A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103285979A (en) * 2013-06-04 2013-09-11 华北电力大学（保定） Low-noise sound insulation sleeve for double-ended ball mill
CN105195273A (en) * 2015-09-23 2015-12-30 沈阳化工大学 Preparation method of damping combined type acoustic shield
FR3046969B1 (en) * 2016-01-21 2019-07-19 Treves Products, Services & Innovation THIN-PROTECTIVE DEVICE FOR ACOUSTIC PROTECTION TO BE PROVIDED AGAINST AN ELECTRIC MOTOR HOUSING WALL FOR A MOTOR VEHICLE
FR3085642B1 (en) 2018-09-11 2022-06-24 Renault Sas ACOUSTIC PROTECTION DEVICE FOR MOTOR VEHICLE ENGINE
FR3107149B1 (en) 2020-02-08 2023-05-12 Psa Automobiles Sa SUPPORT DEVICE FOR AT LEAST ONE ACCESSORY RELATING TO AN ELECTRIC PROPULSION MACHINE CASING

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Publication number Priority date Publication date Assignee Title
SI2052828T1 (en) * 2007-10-23 2011-05-31 Retro Flex Ag Porous heavy acoustic protection films, acoustic protection system and method for producing a porous heavy acoustic protection film
FR2935190B1 (en) * 2008-08-25 2011-04-22 Faurecia Automotive Ind SOUND CONTROL SYSTEM WITH END FILM FOR MOTOR VEHICLE AND ASSOCIATED MOTOR VEHICLE
DE102010010961A1 (en) * 2009-03-19 2011-02-10 Intier Automotive Näher GmbH Laminar structure for inner lining of e.g. body part of motor vehicle, has sound-absorbing layer resting behind surface layer, heavy layer completely or partially connected with absorbing layer, and spring layer attached to heavy layer

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
WO2013072629A1 (en) 2013-05-23
FR2982559A1 (en) 2013-05-17
FR2982559B1 (en) 2014-01-10

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