FR2970739A1 - Device for fixing acoustic protection screen on motor vehicle engine, has upper and lower plates coupled together by attaching unit so that screen zone is sandwiched between plates, and fixing units including rods obtained from upper plate - Google Patents
Device for fixing acoustic protection screen on motor vehicle engine, has upper and lower plates coupled together by attaching unit so that screen zone is sandwiched between plates, and fixing units including rods obtained from upper plate Download PDFInfo
- Publication number
- FR2970739A1 FR2970739A1 FR1100181A FR1100181A FR2970739A1 FR 2970739 A1 FR2970739 A1 FR 2970739A1 FR 1100181 A FR1100181 A FR 1100181A FR 1100181 A FR1100181 A FR 1100181A FR 2970739 A1 FR2970739 A1 FR 2970739A1
- Authority
- FR
- France
- Prior art keywords
- screen
- plates
- fixing
- zone
- motor vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
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- 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
- B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
-
- 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
Abstract
Description
1 L'invention concerne un dispositif de fixation d'un écran de protection acoustique sur un moteur de véhicule automobile, ainsi qu'un tel écran. The invention relates to a device for fixing an acoustic protection screen on a motor vehicle engine, as well as such a screen.
Il est connu de réaliser un écran de protection acoustique pourvu d'une 5 structure à base de matériau plastique moulé. It is known to provide an acoustic protection screen provided with a structure based on molded plastic material.
Pour fixer un tel écran sur un moteur de véhicule automobile, il est usuel d'interposer entre les deux des plots de fixation et de découplage en caoutchouc, ceci afin de limiter la transmission des vibrations du moteur vers 10 l'écran. To fix such a screen on a motor vehicle engine, it is customary to interpose between the two rubber fixing and decoupling studs, this in order to limit the transmission of engine vibrations to the screen.
De tels écrans présentent un poids important et leur fixation par plots de découplage entraîne un surcoût. Such screens have a significant weight and their attachment by decoupling pads leads to additional costs.
15 Pour pallier ces inconvénients, il a été proposé, notamment dans le document FR-2 942 853, d'utiliser des écrans allégés, par exemple à base de polyuréthanne semi-rigide, qui présentent l'avantage, en raison de leur légèreté, de ne pas requérir l'utilisation de plots de découplage. In order to overcome these drawbacks, it has been proposed, particularly in document FR-2 942 853, to use lightened screens, for example based on semi-rigid polyurethane, which have the advantage, because of their lightness, not to require the use of decoupling pads.
20 Cependant, de tels écrans allégés peuvent présenter une certaine fragilité en flexion, pouvant se manifester par leur rupture sous l'effet d'une faible flexion. However, such lightened screens can exhibit a certain fragility in flexion, which can be manifested by their rupture under the effect of a slight flexion.
Or, pour des opérations de maintenance ou de réparation du moteur, il est généralement requis de démonter l'écran du moteur. However, for maintenance or repair of the engine, it is usually required to disassemble the engine screen.
En outre, il est souhaitable que les moyens de fixation de l'écran au moteur soient intégrés à l'écran, ceci afin d'éviter que l'opérateur n'ait affaire après son démontage à une multiplicité pièces de fixation désassemblées de l'écran qui peuvent s'égarer. In addition, it is desirable for the means for fixing the screen to the motor to be integrated in the screen, so as to prevent the operator from having to deal with disassembly at a multiplicity of disassembled fixing pieces of the screen. screen that can go astray.
Dans le cas de moyens de fixation intégrés à l'écran, lorsqu'un premier moyen de fixation a été désassemblé, l'opérateur de démontage a la possibilité d'écarter l'écran du moteur à l'aplomb dudit moyen et, un deuxième moyen de 25 30 2 fixation étant toujours assemblé, se présente le risque d'une flexion de l'écran entre les deux moyens de fixation, une telle flexion pouvant être suivie d'une rupture de l'écran. In the case of fasteners integrated in the screen, when a first fastening means has been disassembled, the dismounting operator has the possibility to move the engine screen over the said means and, a second As the fastener is always assembled, there is the risk of flexing of the screen between the two fastening means, such bending being able to be followed by a rupture of the screen.
L'invention a pour but de pallier cet inconvénient. The invention aims to overcome this disadvantage.
A cet effet, et selon un premier aspect, l'invention propose un dispositif de fixation d'un écran de protection acoustique sur un moteur de véhicule automobile, ledit dispositif comprenant deux plaques supérieure et inférieure de rigidification d'une zone dudit écran, lesdites plaques étant reliées l'une à l'autre par au moins un moyen de solidarisation de manière à prendre en sandwich ladite zone, au moins deux moyens de fixation, destinés à coopérer avec des moyens réciproques issus dudit moteur, étant issus de l'une et/ou l'autre desdites plaques. For this purpose, and according to a first aspect, the invention proposes a device for fixing an acoustic protection screen on a motor vehicle engine, said device comprising two upper and lower plates for stiffening an area of said screen, said plates being connected to each other by at least one securing means so as to sandwich said zone, at least two fastening means intended to cooperate with reciprocal means coming from said motor, being derived from the one and / or the other of said plates.
Selon un deuxième aspect, l'invention propose un écran de protection acoustique destiné à être fixé sur un moteur de véhicule automobile, au moins une zone dudit écran étant équipée d'un tel dispositif de fixation. According to a second aspect, the invention proposes an acoustic protection screen intended to be fixed on a motor vehicle engine, at least one zone of said screen being equipped with such a fixing device.
Dans cette description, les termes de positionnement dans l'espace (supérieur, inférieur,...) sont pris en référence au dispositif disposé dans le véhicule In this description, the positioning terms in the space (upper, lower, ...) are taken with reference to the device arranged in the vehicle
La présence de moyen de solidarisation spécifique reliant les plaques permet d'éviter une fixation directe sur l'écran - par exemple par collage -, une telle fixation directe entraînant un risque d'arrachage lors du démontage de l'écran en raison de sa fragilité intrinsèque. The presence of specific securing means connecting the plates avoids a direct attachment to the screen - for example by gluing - such direct attachment resulting in a risk of tearing during disassembly of the screen because of its fragility intrinsic.
Avec l'agencement proposé, on assure une rigidification de l'écran entre les moyens de fixation, ce qui évite le risque de rupture dudit écran lors de son 30 démontage. With the proposed arrangement, it provides a stiffening of the screen between the fastening means, which avoids the risk of rupture of said screen during its disassembly.
D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence à la figure jointe qui est une 3 représentation schématique partielle en coupe d'un écran fixé sur un moteur selon une réalisation. Other features and advantages of the invention will appear in the description which follows, made with reference to the attached figure which is a partial schematic sectional representation of a screen attached to a motor according to one embodiment.
En référence à la figure, on décrit un dispositif 1 de fixation d'un écran 2 de protection acoustique sur un moteur 3 de véhicule automobile, ledit dispositif comprenant deux plaques supérieure 4 et inférieure 5 de rigidification d'une zone 6 dudit écran, lesdites plaques étant reliées l'une à l'autre par au moins un moyen de solidarisation 7 de manière à prendre en sandwich ladite zone, au moins deux moyens de fixation 8, destinés à coopérer avec des moyens réciproques 9 issus dudit moteur, étant issus de l'une et/ou l'autre desdites plaques. With reference to the figure, there is described a device 1 for fixing a screen 2 for acoustic protection on a motor vehicle engine 3, said device comprising two upper plates 4 and 5 for stiffening an area 6 of said screen, said plates being connected to one another by at least one securing means 7 so as to sandwich said zone, at least two fastening means 8, intended to cooperate with reciprocal means 9 coming from said engine, originating from one and / or the other of said plates.
Les plaques 4,5 sont notamment à base de matériau plastique moulé. The plates 4,5 are in particular based on molded plastic material.
L'écran 2 peut notamment être réalisé à base de mousse semi rigide. En particulier, l'écran peut être réalisé conformément à l'enseignement du document FR-2 942 853, c'est-à-dire comprenant une couche supérieure de rigidification et une couche inférieure de ressort, l'écran 1 formant un système d'isolation acoustique de type « masse ressort », lesdites couches étant séparées l'une de l'autre par un film d'étanchéité, par exemple de type bicouche polyamide/polyéthylène, lesdites couches supérieure et inférieure étant à base de mousse semi rigide, par exemple de type polyuréthanne ou mélamine, la mousse de mélamine présentant une densité plus faible que la mousse de polyuréthanne, ladite couche supérieure présentant une masse surfacique comprise entre 100 et 200 g/m2 et ladite couche inférieure présentant une masse surfacique comprise entre 150 et 400 g/m2. The screen 2 may in particular be made of semi rigid foam. In particular, the screen can be produced in accordance with the teaching of the document FR-2 942 853, that is to say comprising a top stiffening layer and a lower spring layer, the screen 1 forming a top system. sound insulation type "spring mass", said layers being separated from each other by a sealing film, for example of the polyamide / polyethylene bilayer type, said upper and lower layers being based on semi-rigid foam, for example of the polyurethane or melamine type, the melamine foam having a lower density than the polyurethane foam, said upper layer having a basis weight of between 100 and 200 g / m 2 and said lower layer having a basis weight of between 150 and 400 g / m2.
Selon la réalisation représentée, au moins un moyen de fixation - ici les deux - est en forme de tige 10 pourvue d'un harpon 11 d'extrémité destiné à coopérer en emboîtement avec un moyen réciproque 9 en forme d'orifice. According to the embodiment shown, at least one fixing means - here both - is rod-shaped 10 provided with an end harness 11 intended to cooperate in engagement with a reciprocal means 9 in the form of an orifice.
De façon non représentée, au moins un moyen de fixation 8 est en forme d'orifice destiné à coopérer en emboîtement avec un moyen réciproque 9 en forme de tige - typiquement de nature métallique - pourvue d'un harpon d'extrémité. In a manner not shown, at least one fastening means 8 is in the form of an orifice intended to cooperate in engagement with a reciprocal means 9 in the form of a rod - typically of a metallic nature - provided with an end harness.
Selon la réalisation représentée, au moins un moyen de solidarisation 7 est sous forme d'une saillie 12 issue d'une plaque 4,5 - ici de la plaque supérieure 4 - et traversant l'écran 2 et l'autre plaque 5,4 - ici la plaque inférieure 5 -, l'extrémité 13 de ladite saillie étant écrasée - notamment à chaud pour former une bouterolle - de manière à solidariser lesdites plaques ensemble. According to the embodiment shown, at least one securing means 7 is in the form of a projection 12 coming from a plate 4,5 - here from the upper plate 4 - and passing through the screen 2 and the other plate 5,4 - Here the lower plate 5 -, the end 13 of said projection being crushed - especially hot to form a rivet - so as to secure said plates together.
Selon une réalisation non représentée où un moyen de fixation 8 est en forme de tige 10 issue de la plaque supérieure 4 et pourvue d'un harpon d'extrémité 11, un moyen de solidarisation est sous forme d'une saillie radiale - notamment en forme de couronne - disposée sur ladite tige, ladite saillie coopérant en harponnage avec un trou 14 de passage de ladite tige prévu dans la plaque inférieure 5. According to a not shown embodiment where a fastening means 8 is in the form of a rod 10 issuing from the upper plate 4 and provided with an end harness 11, a securing means is in the form of a radial projection - in particular in the form of crown - disposed on said rod, said projection co-operating in harpooning with a hole 14 for passing said rod provided in the lower plate 5.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1100181A FR2970739B1 (en) | 2011-01-20 | 2011-01-20 | DEVICE FOR FIXING AN ACOUSTIC PROTECTION SCREEN ON A MOTOR VEHICLE ENGINE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1100181A FR2970739B1 (en) | 2011-01-20 | 2011-01-20 | DEVICE FOR FIXING AN ACOUSTIC PROTECTION SCREEN ON A MOTOR VEHICLE ENGINE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2970739A1 true FR2970739A1 (en) | 2012-07-27 |
FR2970739B1 FR2970739B1 (en) | 2013-02-15 |
Family
ID=44477915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1100181A Expired - Fee Related FR2970739B1 (en) | 2011-01-20 | 2011-01-20 | DEVICE FOR FIXING AN ACOUSTIC PROTECTION SCREEN ON A MOTOR VEHICLE ENGINE |
Country Status (1)
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FR (1) | FR2970739B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014198772A1 (en) * | 2013-06-11 | 2014-12-18 | Reinz-Dichtungs-Gmbh | Heat shield |
FR3061518A1 (en) * | 2017-01-05 | 2018-07-06 | Cera Aps | ACOUSTIC PROTECTION DISPLAY FOR MOTOR VEHICLE ENGINE |
CN108528359A (en) * | 2018-04-20 | 2018-09-14 | 刘兆云 | A kind of automobile engine protective device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000255458A (en) * | 1999-03-02 | 2000-09-19 | Puramakku Kk | Silencer for engine cover |
JP2004198801A (en) * | 2002-12-19 | 2004-07-15 | Tokai Rubber Ind Ltd | Soundproof cover |
JP2005155599A (en) * | 2003-10-30 | 2005-06-16 | Toyoda Gosei Co Ltd | Engine cover |
US20070098954A1 (en) * | 2005-11-01 | 2007-05-03 | Kozerski Richard J | Plastic/metal hybrid engine shield |
US20070218790A1 (en) * | 2006-03-16 | 2007-09-20 | Am General Llc | Composite insulation |
EP2070771A1 (en) * | 2007-12-13 | 2009-06-17 | Reinz-Dichtungs-Gmbh | Heat shield |
-
2011
- 2011-01-20 FR FR1100181A patent/FR2970739B1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000255458A (en) * | 1999-03-02 | 2000-09-19 | Puramakku Kk | Silencer for engine cover |
JP2004198801A (en) * | 2002-12-19 | 2004-07-15 | Tokai Rubber Ind Ltd | Soundproof cover |
JP2005155599A (en) * | 2003-10-30 | 2005-06-16 | Toyoda Gosei Co Ltd | Engine cover |
US20070098954A1 (en) * | 2005-11-01 | 2007-05-03 | Kozerski Richard J | Plastic/metal hybrid engine shield |
US20070218790A1 (en) * | 2006-03-16 | 2007-09-20 | Am General Llc | Composite insulation |
EP2070771A1 (en) * | 2007-12-13 | 2009-06-17 | Reinz-Dichtungs-Gmbh | Heat shield |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014198772A1 (en) * | 2013-06-11 | 2014-12-18 | Reinz-Dichtungs-Gmbh | Heat shield |
FR3061518A1 (en) * | 2017-01-05 | 2018-07-06 | Cera Aps | ACOUSTIC PROTECTION DISPLAY FOR MOTOR VEHICLE ENGINE |
WO2018127648A1 (en) * | 2017-01-05 | 2018-07-12 | Cera Aps | Acoustic shield for a motor vehicle engine |
CN108528359A (en) * | 2018-04-20 | 2018-09-14 | 刘兆云 | A kind of automobile engine protective device |
Also Published As
Publication number | Publication date |
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FR2970739B1 (en) | 2013-02-15 |
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