FR2900886A1 - Self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer - Google Patents

Self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer Download PDF

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Publication number
FR2900886A1
FR2900886A1 FR0604329A FR0604329A FR2900886A1 FR 2900886 A1 FR2900886 A1 FR 2900886A1 FR 0604329 A FR0604329 A FR 0604329A FR 0604329 A FR0604329 A FR 0604329A FR 2900886 A1 FR2900886 A1 FR 2900886A1
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FR
France
Prior art keywords
panel
elastomer
support
composition
panel according
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.)
Pending
Application number
FR0604329A
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French (fr)
Inventor
Veronique Soulat
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
Priority to FR0604329A priority Critical patent/FR2900886A1/en
Publication of FR2900886A1 publication Critical patent/FR2900886A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers
    • 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
    • B60R13/0861—Insulating elements, e.g. for sound insulation for covering undersurfaces of vehicles, e.g. wheel houses
    • 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
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R2021/343—Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer covered in a thermoplastic matrix. The proportion of the elastomer in the composition is arranged so that the structure having vibration damping properties to obtain damping vibrations generated by the vibrating support. The elastomer is based on a tire. Granulometry of the elastomer is 0.5-2 mm and a mass percentage of the elastomer is 10-50%. The self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer covered in a thermoplastic matrix. The proportion of the elastomer in the composition is arranged so that the structure having vibration damping properties to obtain damping vibrations generated by the vibrating support. The elastomer is based on a tire. Granulometry of the elastomer is 0.5-2 mm and a mass percentage of the elastomer is 10-50%. The structure of the panel at 23[deg]C has damping coefficient of >=0.1. The structure of the panel at 100[deg]C has a pulling module of >=500 MPa to protect upper part of the engine. The structure of the panel at 50[deg]C has a pulling module of >=500 MPa to protect lower part of the engine. The average thickness is 1-3 mm. The support zone is in a projection form. The support zone comprises a fixing unit intended to cooperate with a reciprocal unit.

Description

1 L'invention concerne un panneau de protection acoustique d'un moteur deThe invention relates to an acoustic protection panel for a motor of

véhicule automobile.motor vehicle.

Il est connu de réaliser un panneau de protection acoustique d'un moteur de véhicule automobile, destiné notamment à être disposé au dessus ou en dessous dudit moteur, ledit panneau comprenant une structure moulée, ladite structure comprenant au moins une zone d'appui destinée à être montée sur un support vibrant, notamment le moteur lui-même ou la caisse du véhicule.  It is known to produce an acoustic protection panel for a motor vehicle engine, intended in particular to be disposed above or below said motor, said panel comprising a molded structure, said structure comprising at least one support zone intended to be mounted on a vibrating support, in particular the engine itself or the vehicle body.

Ladite structure est généralement à base de matière plastique injectée, d'épaisseur moyenne de 1 à 3 mm, ladite structure ne présentant sensiblement pas de propriétés d'amortissement vibratoire permettant d'obtenir un amortissement des vibrations générées par le support vibrant.  Said structure is generally based on injected plastic material, of average thickness of 1 to 3 mm, said structure having substantially no vibration damping properties to obtain a damping of vibrations generated by the vibrating support.

Il en résulte la nécessité de monter la zone d'appui sur le support vibrant par l'intermédiaire d'un organe élastique de découplage, tel qu'un plot à base de caoutchouc, ceci afin de permettre un découplage des vibrations dudit support vibrant.  This results in the need to mount the bearing zone on the vibrating support by means of a resilient decoupling member, such as a rubber-based pad, in order to allow a decoupling of the vibrations of said vibrating support.

Un tel agencement entraîne des surcoûts et une complexité accrue de fabrication.  Such an arrangement entails additional costs and increased complexity of manufacture.

L'invention a pour but de proposer un panneau agencé de sorte à pouvoir être monté contre le support vibrant sans utiliser d'organe de découplage.  The invention aims to provide a panel arranged so as to be mounted against the vibrating support without using a decoupling member.

A cet effet, l'invention propose un panneau de protection acoustique d'un moteur de véhicule automobile, ledit panneau comprenant une structure moulée, ladite structure comprenant au moins une zone d'appui destinée à être montée en appui contre un support vibrant, ladite structure étant à base d'une composition comprenant un broyat d'élastomère noyé dans une matrice thermoplastique, la proportion dudit élastomère dans ladite composition étant agencée de sorte que ladite structure présente des propriétés d'amortissement 2 vibratoire permettant d'obtenir un amortissement des vibrations générées par le support vibrant.  For this purpose, the invention proposes a sound protection panel of a motor vehicle engine, said panel comprising a molded structure, said structure comprising at least one bearing zone intended to be mounted in abutment against a vibrating support, said structure being based on a composition comprising an elastomer grinding material embedded in a thermoplastic matrix, the proportion of said elastomer in said composition being arranged such that said structure has vibration damping properties 2 allowing vibration damping to be obtained generated by the vibrating support.

Du fait de l'introduction de broyat d'élastomère dans la composition, la structure acquiert des propriétés d'amortissement améliorées, ce qui permet de s'affranchir de l'utilisation d'organes de découplage lors du montage de ladite structure sur le support, la (ou les) zone d'appui étant directement en contact avec ledit support.  Due to the introduction of elastomer grinding material into the composition, the structure acquires improved damping properties, which makes it possible to dispense with the use of decoupling members when mounting said structure on the support , the (or) bearing area being directly in contact with said support.

En outre, la structure conserve une rigidité suffisante pour conférer au panneau des propriétés d'autoportance.  In addition, the structure retains sufficient rigidity to give the panel self-supporting properties.

Dans cette description, les termes de positionnement dans l'espace (dessus, dessous, horizontal,...) sont pris en référence au panneau disposé dans le 15 véhicule.  In this description, the terms of positioning in space (above, below, horizontal, ...) are taken in reference to the panel disposed in the vehicle.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit.  Other features and advantages of the invention will become apparent in the description which follows.

20 On décrit à présent un panneau de protection acoustique d'un moteur de véhicule automobile, tel qu'un panneau destiné à être disposé au dessus ou en dessous du moteur, un cache distribution, un protecteur commonrail , un filtre à air, etc..., ledit panneau comprenant une structure moulée, par exemple par injection, ladite structure comprenant au moins une zone d'appui destinée à 25 être montée en appui contre un support vibrant, notamment le moteur lui-même ou la caisse du véhicule, ladite structure étant à base d'une composition comprenant un broyat d'élastomère noyé dans une matrice thermoplastique, la proportion dudit élastomère dans ladite composition étant agencée de sorte que ladite structure présente des propriétés d'amortissement vibratoire permettant 30 d'obtenir un amortissement des vibrations générées par le support vibrant.  An acoustic protection panel of a motor vehicle engine, such as a panel intended to be arranged above or below the engine, a distribution cover, a commonrail protector, an air filter, etc., is now described. .., said panel comprising a molded structure, for example by injection, said structure comprising at least one bearing zone intended to be mounted in abutment against a vibrating support, in particular the engine itself or the vehicle body, said structure being based on a composition comprising an elastomer grinding material embedded in a thermoplastic matrix, the proportion of said elastomer in said composition being arranged such that said structure has vibratory damping properties enabling vibration damping to be obtained generated by the vibrating support.

Selon une réalisation, le broyat étant à base de pneus, notamment usagés, ce qui permet un recyclage desdits pneus. 3 Selon une réalisation, la granulométrie du broyat est comprise entre 0,5 et 2 mm, ce qui évite de réaliser une micronisation coûteuse.  According to one embodiment, the ground material being based on tires, particularly used, which allows a recycling of said tires. In one embodiment, the particle size of the ground material is between 0.5 and 2 mm, which avoids costly micronization.

Selon une réalisation, le pourcentage en masse de broyat dans la composition est compris entre 10% et 50%.  According to one embodiment, the mass percentage of ground material in the composition is between 10% and 50%.

Un additif, tel qu'un anhydride maléique, peut être ajouté à la composition afin d'améliorer la compatibilité entre la matrice et le broyat. Selon une réalisation, la structure du panneau présente à 23 C un coefficient d'amortissement supérieur ou égal à 0,1, sachant que ce coefficient croît avec la température générée par le moteur, un tel coefficient permettant d'assurer un bon amortissement des vibrations générées par le support vibrant. 15 Selon une réalisation, la structure du panneau présente, jusqu'à une température de 100 C, un module de traction (ou module de Young) supérieur ou égal à 500 MPa, de sorte à former panneau de protection acoustique de dessus de moteur, sachant que ce module diminue en fonction inverse de la 20 température. Un tel module de traction suffit, pour les épaisseurs de structure usuellement utilisées, notamment entre 1 et 3 mm, à conférer une autoportance suffisante audit panneau.  An additive, such as maleic anhydride, may be added to the composition to improve compatibility between the matrix and the ground material. According to one embodiment, the structure of the panel has a damping coefficient of greater than or equal to 0.1 at 23 ° C., knowing that this coefficient increases with the temperature generated by the motor, such a coefficient making it possible to ensure good damping of the vibrations. generated by the vibrating support. According to one embodiment, the structure of the panel has, up to a temperature of 100 C, a tensile modulus (or Young's modulus) greater than or equal to 500 MPa, so as to form a motor top acoustic protection panel, knowing that this module decreases in inverse function of the temperature. Such a tensile modulus is sufficient, for the usual thicknesses of structure, especially between 1 and 3 mm, to confer sufficient self-support to said panel.

Dans une telle réalisation, la matrice peut être à base de polyamide, présentant 25 une bonne résistance aux températures élevées.  In such an embodiment, the matrix may be polyamide-based, having good high temperature resistance.

Selon une réalisation, la structure du panneau présente, jusqu'à une température de 50 C, un module de traction supérieur ou égal à 500 MPa, de sorte à former panneau de protection acoustique de dessous de moteur. 30 4 Dans une telle réalisation, la matrice peut être à base de polypropylène, l'emplacement du panneau sur le véhicule correspondant à des températures modérées.  According to one embodiment, the structure of the panel has, up to a temperature of 50 C, a tensile modulus greater than or equal to 500 MPa, so as to form acoustic underbody protection panel. In such an embodiment, the matrix may be polypropylene-based, the location of the panel on the vehicle corresponding to moderate temperatures.

Selon les réalisations envisagées, l'épaisseur moyenne de la structure du panneau peut être comprise entre 1 et 3 mm. Par épaisseur moyenne, on entend l'épaisseur concernant les zones hors zones de nervures et d'appui.  According to the envisaged embodiments, the average thickness of the structure of the panel may be between 1 and 3 mm. By average thickness is meant the thickness of the areas outside the zones of ribs and support.

Selon une réalisation, la structure du panneau comprend une pluralité de zones io d'appui sous forme de saillies.  In one embodiment, the panel structure comprises a plurality of bearing areas in the form of projections.

Selon une réalisation, au moins une zone d'appui comprend un moyen de fixation, tel qu'une excroissance ou un orifice, issu de matière, destiné à coopérer avec un moyen réciproque, tel qu'un orifice ou une excroissance, 15 prévu sur le support sur lequel il est destiné à être monté.  According to one embodiment, at least one bearing zone comprises a fastening means, such as an outgrowth or an orifice, made from material intended to cooperate with a reciprocal means, such as an orifice or an excrescence, provided on the support on which it is intended to be mounted.

Claims (12)

REVENDICATIONS 1. Panneau de protection acoustique d'un moteur de véhicule automobile, ledit panneau comprenant une structure moulée, ladite structure comprenant au moins une zone d'appui destinée à être montée en appui contre un support vibrant, ledit panneau étant caractérisé en ce que ladite structure est à base d'une composition comprenant un broyat d'élastomère noyé dans une matrice thermoplastique, la proportion dudit élastomère dans ladite composition étant agencée de sorte que ladite structure présente des propriétés d'amortissement vibratoire permettant d'obtenir un amortissement des vibrations générées par le support vibrant.  1. acoustic protection panel of a motor vehicle engine, said panel comprising a molded structure, said structure comprising at least one bearing zone intended to be mounted in abutment against a vibrating support, said panel being characterized in that said structure is based on a composition comprising an elastomer grinding material embedded in a thermoplastic matrix, the proportion of said elastomer in said composition being arranged such that said structure has vibration damping properties allowing to obtain a damping of the vibrations generated. by the vibrating support. 2. Panneau selon la revendication 1, le broyat étant à base de pneus.  2. Panel according to claim 1, the ground material being based on tires. 3. Panneau selon la revendication 1 ou 2, la granulométrie du broyat étant comprise entre 0,5 et 2 mm.  3. Panel according to claim 1 or 2, the grain size of the ground material being between 0.5 and 2 mm. 4. Panneau selon l'une quelconque des revendications 1 à 3, le pourcentage 20 en masse de broyat dans la composition étant compris entre 10% et 50%.  4. Panel according to any one of claims 1 to 3, the percentage by mass of ground material in the composition being between 10% and 50%. 5. Panneau selon l'une quelconque des revendications 1 à 4, la structure dudit panneau présentant à 23 C un coefficient d'amortissement supérieur ou égal à 0,1.  5. Panel according to any one of claims 1 to 4, the structure of said panel having 23 C damping coefficient greater than or equal to 0.1. 6. Panneau selon l'une quelconque des revendications 1 à 5, la structure dudit panneau présentant, jusqu'à une température de 100 C, un module de traction supérieur ou égal à 500 MPa, de sorte à former panneau de protection acoustique de dessus de moteur. 25 30  6. Panel according to any one of claims 1 to 5, the structure of said panel having, up to a temperature of 100 C, a tensile modulus greater than or equal to 500 MPa, so as to form top acoustic protection panel engine. 25 30 7. Panneau selon la revendication 6, la matrice étant à base de polyamide. 15 6  7. Panel according to claim 6, the matrix being based on polyamide. 15 6 8. Panneau selon l'une quelconque des revendications 1 à 5, la structure dudit panneau présentant, jusqu'à une température de 50 C, un module de traction supérieur ou égal à 500 Mpa, de sorte à former panneau de protection acoustique de dessous de moteur.  8. Panel according to any one of claims 1 to 5, the structure of said panel having, up to a temperature of 50 C, a tensile modulus greater than or equal to 500 MPa, so as to form acoustic protection panel from below engine. 9. Panneau selon la revendication 8, sa matrice étant à base de polypropylène.  9. Panel according to claim 8, its matrix being based on polypropylene. 10. Panneau selon l'une quelconque des revendications 1 à 9, son épaisseur 10 moyenne étant comprise entre 1 et 3 mm.  10. Panel according to any one of claims 1 to 9, its average thickness being between 1 and 3 mm. 11. Panneau selon l'une quelconque des revendications 1 à 10, la structure dudit panneau comprenant une pluralité de zones d'appui sous forme de saillies.  11. Panel according to any one of claims 1 to 10, the structure of said panel comprising a plurality of support zones in the form of projections. 12. Panneau selon l'une quelconque des revendications 1 à 11, au moins une zone d'appui comprenant un moyen de fixation, issu de matière, ledit moyen étant destiné à coopérer avec un moyen réciproque prévu sur le support sur lequel il est destiné à être monté. 20  12. Panel according to any one of claims 1 to 11, at least one support zone comprising a fixing means, made of material, said means being adapted to cooperate with a reciprocal means provided on the support on which it is intended. to be mounted. 20
FR0604329A 2006-05-15 2006-05-15 Self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer Pending FR2900886A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0604329A FR2900886A1 (en) 2006-05-15 2006-05-15 Self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0604329A FR2900886A1 (en) 2006-05-15 2006-05-15 Self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer

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FR2900886A1 true FR2900886A1 (en) 2007-11-16

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FR0604329A Pending FR2900886A1 (en) 2006-05-15 2006-05-15 Self-supporting acoustic panel for protecting automobile engine, comprises a molded structure having a support zone intended to be mounted against a vibrating support, where the structure is based on a composition having crushed elastomer

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02306299A (en) * 1989-05-22 1990-12-19 Chuetsu Pulp Kogyo Kk Sound absorbing material
DE4243795A1 (en) * 1992-12-23 1994-07-07 Lechler Elring Dichtungswerke Coating on deep drawn metal plate screen for vehicle engine compartment
JPH07124971A (en) * 1993-10-30 1995-05-16 Hiroshima Kasei Ltd Manufacture of soundproofing material
JPH0934469A (en) * 1994-11-01 1997-02-07 Toyoda Gosei Co Ltd Sound insulating material
JPH09296534A (en) * 1996-04-30 1997-11-18 Chuo Kagaku Kk Sound absorbing composite panel
JPH1165571A (en) * 1997-08-21 1999-03-09 Nishi Nippon Ryutai Giken:Kk Production of acoustic material and production of acoustic material
JPH11123733A (en) * 1997-10-23 1999-05-11 Tokai Rubber Ind Ltd Sound absorber and its manufacture
EP1614610A1 (en) * 2004-07-07 2006-01-11 THEYSOHN Formenbau GmbH Vehicle underbody cowling und manufactury process therefor
DE102004053751A1 (en) * 2004-11-06 2006-05-11 Seeber Ag & Co. Kg Acoustic trim part for a vehicle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02306299A (en) * 1989-05-22 1990-12-19 Chuetsu Pulp Kogyo Kk Sound absorbing material
DE4243795A1 (en) * 1992-12-23 1994-07-07 Lechler Elring Dichtungswerke Coating on deep drawn metal plate screen for vehicle engine compartment
JPH07124971A (en) * 1993-10-30 1995-05-16 Hiroshima Kasei Ltd Manufacture of soundproofing material
JPH0934469A (en) * 1994-11-01 1997-02-07 Toyoda Gosei Co Ltd Sound insulating material
JPH09296534A (en) * 1996-04-30 1997-11-18 Chuo Kagaku Kk Sound absorbing composite panel
JPH1165571A (en) * 1997-08-21 1999-03-09 Nishi Nippon Ryutai Giken:Kk Production of acoustic material and production of acoustic material
JPH11123733A (en) * 1997-10-23 1999-05-11 Tokai Rubber Ind Ltd Sound absorber and its manufacture
EP1614610A1 (en) * 2004-07-07 2006-01-11 THEYSOHN Formenbau GmbH Vehicle underbody cowling und manufactury process therefor
DE102004053751A1 (en) * 2004-11-06 2006-05-11 Seeber Ag & Co. Kg Acoustic trim part for a vehicle

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