• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a screen (1) comprising, arranged one on the other: a support (2) based on porous polyurethane foam, so as to allow an acoustic absorption of the noise from said engine, said support comprising a first face (3) to be exposed to the motor and a second opposite face (11) which is devoid of a watertight coating; a reflective metal sheet (4), in particular of aluminum, for thermal protection of all or part of said first face; said screen further comprising, disposed between said support and said sheet, a thermal insulation layer (5) of porous fibrous material.
    公开号:FR3033746A1
    申请号:FR1552315
    申请日:2015-03-20
    公开日:2016-09-23
    发明作者:Laurent Waxin
    申请人:Cera APS SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to an acoustic protection screen for a motor vehicle engine. It is known to produce an acoustic protection screen for a motor vehicle engine, said screen comprising, arranged on one another: a support based on porous polyurethane foam, so as to allow an acoustic absorption of the noise from said motor, said support comprising a first face intended to be exposed to the motor and a second opposite face which is devoid of waterproof coating, - a reflective metal sheet - in particular aluminum - of thermal protection of all or part of said first face. The presence of such a thermal protection sheet is essential, at least on part of the first face, when the support does not have sufficient resistance to the heat released by the engine. It is also specified that the fact that the second face is devoid of waterproof coating allows the support to fully play its role of acoustic absorption. With such an arrangement, it may occur that the sheet does not sufficiently reflect the heat emitted by the engine to provide the expected thermal protection, which can lead to degradation of the support.
    [0002] The object of the invention is to propose an arrangement making it possible to overcome this drawback. For this purpose, the invention proposes an acoustic protection screen for a motor vehicle engine, said screen comprising, arranged one on the other: a support based on porous polyurethane foam, so as to allow an acoustic absorption noise from said motor, said support comprising a first face intended to be exposed towards the motor and a second opposite face which is devoid of a waterproof coating, a reflective metallic sheet, in particular of aluminum, of thermal protection of all or part said first face, said screen further comprising, disposed between said support and said sheet, a heat insulating layer of porous fibrous material. It should be noted here that the term "engine" should be considered in the broad sense, including, inter alia, the exhaust line of the vehicle, and more generally any part of the vehicle that emits heat in a significant manner, in particular at a minimum temperature of 200. ° C. With the proposed arrangement, the heat transmission from the sheet to the support is attenuated by the insulating layer, which satisfactorily ensures the thermal protection of said support. Moreover, the fact that the second face is devoid of waterproof coating allows the support to play its full acoustic absorption role.
    [0003] Other features and advantages of the invention will appear in the description which follows, made with reference to the appended figures, in which: FIG. 1 is a partial diagrammatic sectional view of a screen according to one embodiment, FIG. 2 is a diagrammatic detail view in section of a screen in an alternative embodiment. With reference to the figures, a screen 1 for acoustic protection for a motor vehicle engine is described, said screen comprising, arranged one on the other: a support 2 based on porous polyurethane foam, so as to allow acoustic absorption of the noise coming from said motor, said support comprising a first face 3 intended to be exposed towards the motor and a second opposite face 11 which is devoid of a watertight coating, 3033746 3 - a reflective metal sheet 4 - in particular of aluminum - of protection thermal of all or part of said first face, said screen further comprising, disposed between said support and said sheet, a heat insulating layer 5 of porous fibrous material.
    [0004] According to one embodiment, the support 2 has a resistance to the passage of air of between 1000 and 1500 N.s.m-3. The fibers used are in particular mineral fibers - for example glass, silica or rock - chosen according to the expected thermal conductivity characteristics. According to one embodiment, the foam of the support 2 has a density of between 0.22 and 0.28, and especially between 0.23 and 0.27.
    [0005] According to one embodiment, the insulating layer 5 has a thermal conductivity of between 0.055 and 0.061 W.m-1.K-1 at 200 ° C., and in particular between 0.057 and 0.059 W.m-1.K-1.
    [0006] According to one embodiment, the insulating layer 5 has an air passing resistance of less than 4000 N · m -3. According to one embodiment, the insulation layer 5 has a thickness of between 3 and 6 mm.
    [0007] According to one embodiment, the insulation layer 5 has a density of between 600 and 1000 g / m2. According to one embodiment, the fibers of the insulating layer 5 are bonded together by a resin, in particular a thermosetting resin, in particular a phenol resin. In this case, the connection between the sheet 4 and the insulating layer 5 can be provided by the resin.
    [0008] In one embodiment, the fibers of the insulation layer 5 are bonded together by needling without adding resin, which facilitates the recycling of the screen at the end of its life.
    [0009] According to one embodiment, illustrated in FIG. 1, the insulating layer 5 is overmolded by the support 2. This provides a robust mechanical catch between the support 2 and the insulating layer 5, because of the penetration superficial foam in said layer. According to an alternative embodiment, illustrated in FIG. 2, the insulating layer 5 is associated with the support 2 by means of fasteners 6 arranged to create an air gap 7 between said layer and said support. The presence of such an air gap 7 makes it possible to provide additional thermal insulation.
    [0010] According to the embodiment shown in FIG. 2, the fastening means comprise a fastening eyelet 12 and a spacing washer 13 through which said eyelet passes, said washer being disposed between the support 2 and the insulating layer 5.
    [0011] In this variant, the connection between the sheet 4 and the insulating layer 5 can be ensured, at least in part, as shown in FIG. 2, by the fixing means 6. In one embodiment, the metal sheet 4 has a thickness between 50 and 150 microns, and especially between 70 and 100 microns, a thickness as small contributing to the lightening of the screen 1.
    [0012] In a manner not shown, the metal sheet 4 can be provided with a plurality of micro-perforations, the surface density of micro perforations being in particular between 400,000 and 600,000 micro-perforations per m2.
    [0013] The presence of such micro-perforations allows the sound waves to pass through the metal sheet 4 to be absorbed by the insulating layer 5 and by the support 2. The insulating layer 5 covers all or part of the first face 3, the sheet 4 covering all or part of said insulation layer. According to the embodiment shown in Figure 1, the insulating layer 5 covers a portion of the first face 3, the sheet 4 covering a portion of said insulation layer.
    [0014] There is thus a screen 1 of which: a first portion 8 of the first face 3, intended to be the least exposed to heat, is devoid of thermal protection, - a second part 9, intended to be more exposed, is protected only by the insulating layer 5, - a third part 10, intended to be the most exposed, is protected by the insulating layer 5 and the metal sheet 4.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Screen (1) for acoustic protection for motor vehicle engine, said screen comprising, arranged on one another: - a support (2) based on porous polyurethane foam, so as to allow an acoustic absorption of the noise from said motor, said support comprising a first face (3) intended to be exposed towards the motor and a second face (11) opposite which is devoid of waterproof coating, - a sheet (4) reflective metal - in particular aluminum - thermal protection of all or part of said first face, said screen being characterized in that it further comprises, disposed between said support and said sheet, a thermal insulation layer (5) of porous fibrous material.
    [0002]
    2. Screen according to claim 1, characterized in that the support (2) has a resistance to the passage of air between 1000 and 1500 N.s.m-3.
    [0003]
    3. Screen according to one of claims 1 or 2, characterized in that the foam of the support (2) has a density between 0.22 and 0.28, and in particular between 0.23 and 0.27.
    [0004]
    4. Screen according to any one of claims 1 to 3, characterized in that the insulation layer (5) has a thermal conductivity of between 0.055 and 0.061 Wm-1.K-1 at 200 ° C, and especially between 0.057 and 0.059 Wm-1.K-1.
    [0005]
    5. Screen according to any one of claims 1 to 4, characterized in that the insulation layer (5) has a resistance to the passage of air less than 4000 N.s.m-3.
    [0006]
    6. Screen according to any one of claims 1 to 5, characterized in that the insulation layer (5) has a density of between 600 and 1000 g / m2. 3033746 7
    [0007]
    7. Screen according to any one of claims 1 to 6, characterized in that the insulation layer (5) is overmolded by the support (2). 5
    [0008]
    8. Screen according to any one of claims 1 to 6, characterized in that the insulating layer (5) is associated with the support (2) by fastening means (6) arranged to create a blade of air ( 7) between said layer and said support, said fixing means including in particular a fixing eyelet (12) and a spacing washer (13) through which said eyelet passes, said washer being disposed between said support and said protective layer; 'insulation.
    [0009]
    9. Screen according to any one of claims 1 to 8, characterized in that the sheet (4) is provided with a plurality of micro-perforations, the surface density of micro perforations being in particular between 400 000 and 600 000 micro-perforations per m2.
    [0010]
    10. Screen according to any one of claims 1 to 9, characterized in that the insulation layer (5) covers all or part of the first face (3), the sheet (4) covering all or part of said layer. insulation. 20
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3033746A1|2016-09-23|ACOUSTIC PROTECTION DISPLAY FOR MOTOR VEHICLE ENGINE
    EP2053593B1|2019-05-22|Acoustic protection complex comprising a compregnated porous layer
    EP1908638A1|2008-04-09|Acoustic and thermal protection device
    CA2732351A1|2010-02-04|Assembly of components connected by a device that maintains the integrity of the surface of one of the components
    EP1772604B1|2012-02-29|Heat and sound protection screen of a vehicle component
    FR2976556A1|2012-12-21|AIR INTAKE OF AN AIRCRAFT NACELLE INCORPORATING A REINFORCED LIP WITH A JELLY EFFECT DEFROSTING SYSTEM
    FR2869871A1|2005-11-11|Edge protector and impact revealer for composite structure is made fro m closed-cell plastic foam block with U-shaped cross-section
    EP2063095A2|2009-05-27|Fan nozzle with adjustable cross-section
    FR3036076A1|2016-11-18|METHOD FOR PRODUCING AN ACOUSTIC PROTECTION PANEL TO BE MOUNTED IN RELATION TO A SOUND AND HOT SOURCE OF A VEHICLE
    EP1586443A2|2005-10-19|Thermal and sound protective device
    FR2982559A1|2013-05-17|THIN-PROTECTIVE DEVICE FOR ACOUSTIC PROTECTION TO BE PROVIDED AGAINST AN ELECTRIC MOTOR HOUSING WALL FOR A MOTOR VEHICLE
    EP2631123A1|2013-08-28|Noise screen to be placed in regard of the engine of an automotive vehicle.
    FR2901209A1|2007-11-23|Sound proofing screen for motor vehicle, has housing in its reverse side to form spacing zone between side and wall, where side has geometry corresponding to geometry of wall to take on wall`s shape
    FR2941902A1|2010-08-13|Acoustic and thermal protection device for protecting e.g. turbine casing, from exhaust line in motor vehicle, has stiffening element for stiffening portion of flexible laminate, where other portion of laminate forms flexible portion
    FR3064955B1|2019-06-28|THERMO-ACOUSTIC PROTECTION SCREEN FOR MOTOR VEHICLE
    EP3871969A1|2021-09-01|Element for attaching a means for attaching a construction element intended for a ship
    FR2923069A1|2009-05-01|Acoustic protection screen for motor vehicle, has metallic sheet provided with micro perforations and associated on upper surface of porous hull that is resistant to passage of air ranging between specific Newton seconds per cubic meters
    FR2970739A1|2012-07-27|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
    EP3771035A1|2021-01-27|Bonnet for a vehicle, in particular for a supersonic or hypersonic vehicle
    FR3069480A1|2019-02-01|ACOUSTIC PROTECTION COVER FOR MOTOR VEHICLE MOTOR
    FR2860036A1|2005-03-25|Thermal and acoustic protective shield for motor vehicle exhaust pipe has rigid structure and multi-layer complex joined by stitches
    FR2864563A1|2005-07-01|Fire wall for use in vehicle, has obstruction plates fixed on opposite sides of peripheral frame, where frame is inserted between two plates so as to accommodate free air volume between two plates to offer acoustic insulation
    EP1750250A1|2007-02-07|Air-space type acoustic board
    FR2898585A1|2007-09-21|Tubular equipment e.g. electric cable, fixing device for aircraft`s phonic and thermal insulation mat, has self-adhesive element constituted of velvet strip and another strip with hooks, where velvet strip is stuck on face of mat
    FR3063261A1|2018-08-31|ACOUSTIC PROTECTION SCREEN FOR MOUNTING UNDER A MOTOR VEHICLE ENGINE
    同族专利:
    公开号 | 公开日
    WO2016151209A1|2016-09-29|
    EP3271215A1|2018-01-24|
    ES2737402T3|2020-01-14|
    EP3271215B1|2019-04-03|
    FR3033746B1|2018-08-10|
    CN107810097B|2020-01-10|
    CN107810097A|2018-03-16|
    US20180105122A1|2018-04-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2423099A1|1974-05-13|1975-11-27|Helmut Ing Grad Pelzer|Multi-layer flat vehicle body panel - with reflective metal layer has several flexible fibrous insulating layers|
    US5712447A|1996-05-14|1998-01-27|The United States Of America As Represented By The Secretary Of The Navy|Vibrationally and acoustically insulated structure|
    WO2003021096A1|2001-09-04|2003-03-13|Hp-Chemie Pelzer Research And Development Ltd.|Heat-insulating and sound-absorbing lining for the engine compartment of motor vehicles|
    EP2503040A1|2011-03-23|2012-09-26|Autoneum Management AG|Moulded multilayer lining|FR3064955A1|2017-04-10|2018-10-12|Cera Aps|THERMO-ACOUSTIC PROTECTION SCREEN FOR MOTOR VEHICLE|
    WO2019020941A1|2017-07-28|2019-01-31|Treves Products, Services & Innovation|Acoustic protection cover for motor vehicle engine|WO2002059870A1|2001-01-23|2002-08-01|Kasai Kogyo Co., Ltd.|Soundproof material for vehicle and method of manufacturing the material|
    FR2864922B1|2004-01-13|2006-05-12|Cera|STRUCTURAL PANEL WITH POROUS SKINS|
    FR2921009B1|2007-09-17|2010-02-26|Cera|STRUCTURAL PANEL OF A MOTOR VEHICLE COMPRISING A MOLDED SHELL BASED ON CELLULOSE FIBERS|FR3069210B1|2017-07-24|2020-12-11|Faurecia Automotive Ind|AUTOMOTIVE VEHICLE SOUNDPROOFING PART AND ASSOCIATED MANUFACTURING PROCESS|
    CN111186188B|2020-01-19|2021-04-27|东风汽车集团有限公司|Sound-absorbing heat-insulating pad for automobile engine compartment|
    法律状态:
    2016-03-14| PLFP| Fee payment|Year of fee payment: 2 |
    2016-09-23| PLSC| Search report ready|Effective date: 20160923 |
    2017-03-27| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-30| PLFP| Fee payment|Year of fee payment: 4 |
    2019-03-28| PLFP| Fee payment|Year of fee payment: 5 |
    2020-12-18| ST| Notification of lapse|Effective date: 20201110 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1552315A|FR3033746B1|2015-03-20|2015-03-20|ACOUSTIC PROTECTION DISPLAY FOR MOTOR VEHICLE ENGINE|
    FR1552315|2015-03-20|FR1552315A| FR3033746B1|2015-03-20|2015-03-20|ACOUSTIC PROTECTION DISPLAY FOR MOTOR VEHICLE ENGINE|
    EP16712956.8A| EP3271215B1|2015-03-20|2016-02-25|Method for producing an acoustic protective screen for a motor vehicle engine and screen obtained by such a method|
    PCT/FR2016/050439| WO2016151209A1|2015-03-20|2016-02-25|Method for producing an acoustic protection screen for a motor vehicle engine and screen obtained using such a method|
    ES16712956T| ES2737402T3|2015-03-20|2016-02-25|Procedure for carrying out an acoustic protection screen for motor vehicle motor and screen obtained by such a procedure|
    CN201680023278.8A| CN107810097B|2015-03-20|2016-02-25|Method for forming a sound protection screen for a motor vehicle engine and protection screen obtained by said method|
    US15/559,470| US20180105122A1|2015-03-20|2016-02-25|Method for producing an acoustic protection screen for a motor vehicle engine and screen obtained using such a method|
    [返回顶部]