WO2007122045A1 - Habillage de capot moteur - Google Patents

Habillage de capot moteur Download PDF

Info

Publication number
WO2007122045A1
WO2007122045A1 PCT/EP2007/052663 EP2007052663W WO2007122045A1 WO 2007122045 A1 WO2007122045 A1 WO 2007122045A1 EP 2007052663 W EP2007052663 W EP 2007052663W WO 2007122045 A1 WO2007122045 A1 WO 2007122045A1
Authority
WO
WIPO (PCT)
Prior art keywords
self
layer
bonnet
supporting layer
hood
Prior art date
Application number
PCT/EP2007/052663
Other languages
German (de)
English (en)
Inventor
Albert Kallenberg
Original Assignee
Carcoustics Techconsult Gmbh
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 Carcoustics Techconsult Gmbh filed Critical Carcoustics Techconsult Gmbh
Publication of WO2007122045A1 publication Critical patent/WO2007122045A1/fr

Links

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
    • B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments

Definitions

  • the invention relates to an acoustically effective hood panel for a motor vehicle, with a self-supporting layer and an associated cover layer arranged on the motor side.
  • the bonnet cover according to the invention comprises a self-supporting layer and at least one associated, motor side disposed cover layer of an air-permeable synthetic fiber fleece.
  • MY / JB 051174WO Self-supporting layer is formed from wood fibers and thermoplastic fibers molded part which is at least partially permeable to air at a layer thickness in the range of 1 to 3.5 mm and in at least one air-permeable surface portion has a flow resistance in the range of 10 to 800 kNs / m 4 .
  • the thermoplastic fibers of the molded part have a melting temperature above 160 0 C.
  • the bonnet cowling according to the invention has a comparatively simple construction in this preferred embodiment.
  • the formed from wood fibers and thermoplastic fibers press molding gives her a high inherent stability, so that less mounting elements ⁇ eg clip elements ⁇ are necessary than in conventional bonnet fairing for the assembly of the hood trim.
  • the production of the engine hood panel according to the invention is possible with a simple frame tool and thus requires only relatively low tooling costs.
  • the materials required for the production of the bonnet cover according to the invention are available relatively inexpensively.
  • the use of thermoplastic fibers whose melting temperature is higher than 160 0 C, allows a high temperature load of the hood trim according to the invention.
  • the air-permeable synthetic fiber fleece used as the cover layer gives the bonnet cover a pleasing, high-quality appearance.
  • the bonnet cover according to the invention is characterized by its good stackability also by advantageous logistical properties.
  • a preferred embodiment of the engine hood trim according to the invention provides that its self-supporting layer has surface areas with different flow resistance.
  • An embodiment in which the self-supporting layer has a first area region which has a flow resistance in the range of 10 to 50 kNs / m 4 and at least one further area area which has a flow resistance in the region has proven to be favorable for broadband sound absorption Range of 60 to 800 kNs / m 4 .
  • a further advantageous embodiment of the bonnet cowling according to the invention is characterized in that the self-supporting, at least partially air-permeable layer is arranged substantially at a distance from the sheet metal motor hood.
  • the self-supporting layer preferably delimits with the hood an air space which acts as an acoustic spring, while the self-supporting layer at least partially acts as an oscillatable mass of the acoustic spring-mass system thus formed.
  • the self-supporting layer on its side facing the hood at least partially with a
  • the bonnet cowling according to the invention offers in this embodiment an advantageous impact protector in the event that a pedestrian collides in an accident on the hood in the hard engine block. The impact and risk of injury can be significantly reduced for a pedestrian.
  • the aluminum foil is preferably made microperforated, wherein the hole diameter of the perforation in the range of 0.03 and 1 mm. This makes it possible to further improve a broadband sound absorption of the bonnet cover according to the invention.
  • Fig. 1 is a front perspective view of a
  • Fig. 2 is a cross-sectional view of a portion of a hood with an attached thereto
  • FIG. 3 is a cross-sectional view of a portion of an engine hood with an engine cowl trim attached thereto according to a second embodiment
  • FIG. 4 is a cross-sectional view of a portion of a hood with an engine hood cover attached thereto according to a third embodiment
  • Fig. 5 is a front perspective view of a
  • the hood panel 1 shown in Fig. 1 is fastened with a few clip elements 2 on the underside of an engine hood 3 made of sheet metal of a motor vehicle.
  • the hood panel 1 consists in its simplest embodiment of a self-supporting layer 4 and a covering layer 5 connected thereto cohesively (see Fig. 2).
  • the self-supporting layer 4 is a formed from wood fibers and thermoplastic fibers molded part with high intrinsic stability.
  • the layer thickness of the press molding 4 is in the range of 1 to 3.5 mm.
  • the thermoplastic fibers used in the mold part 4 have a melting temperature of at least 160 0 C, preferably of at least 180 0 C. The ratio
  • MY / DS 051174WO from wood fibers to thermoplastic fibers in the molded article ranges from 5: 1 to 2: 1.
  • the self-supporting layer 4 is at least partially permeable to air and has in at least one air-permeable surface section a flow resistance in the range of 10 to 800 kKfs / m 4 , preferably in the range of 30 to 800 kNs / m 4 .
  • the self-supporting layer 4 is locally densified differently, so that it has a plurality of surface areas with different flow resistance.
  • a certain surface area of the self-supporting layer 4 has a length-related flow resistance in the range of 10 to 50 kNs / m 4 , preferably in the range of 30 to 50 kNs / m 4 , while at least one further surface area of the self-supporting layer 4 has a length-related flow resistance in the range of 60 to 800 kNs / m 4 .
  • the motor side arranged, connected to the self-supporting layer 4 covering 5 is made of a thin air-permeable synthetic fiber fleece, preferably formed from a polyester fleece.
  • the thickness of the cover layer 5 is in the range of 0.01 and 0.5 mm.
  • the compound of the cover layer 5 with the self-supporting layer 4 is designed as an adhesive bond.
  • a thermoplastic and / or thermosetting powder adhesive is applied to the cover layer 5 and / or the self-supporting layer 4 in advance.
  • the powder glue is applied to the cover layer 5 and / or the self-supporting layer 4 in advance.
  • MY / js 051174WO forms in the cured state an air-permeable network.
  • the shape of the bonnet trim 1 according to the invention is adapted to the underside structure of the bonnet 3. This means that stability-increasing formations of the engine hood 3, such as beads, grooves, depressions and the like on the underside of the hood, at least partially in a corresponding form, are also formed in the engine hood lining 1.
  • the hood panel 1 is preferably secured by means of clip elements 2 to spoke or channel-shaped protrusions 3.1 of the hood 3.
  • the self-supporting layer 4 is applied to the respective shape 3.1.
  • the clip element 2 is latched in an opening 6 of the lower-side hood extension 3.1, wherein the region of the hood cover 1 surrounding the clip element 2 is clamped with slight pressure between the hood extension 3.1 and the head 2.1 of the clip element 2.
  • the hood panel 1 Adjacent to a spoke or channel-shaped hood projection 3.1 according to FIG. 2, the hood panel 1 is shaped such that its self-supporting layer 4 is arranged substantially at a distance from the hood 3.
  • the self-supporting, vibratory layer 4 and the hood 3 thereby limit an air space, which acts in particular as a spring of an acoustic spring-mass system.
  • the engine hood panel 1 shown only in sections in FIG. 2 has a basis weight in the range of 700 and 2000 g / m 2 , preferably in the range of 900
  • MY / js 051174WO up to 1500 g / m 2 . It is both oliophobic and hydrophobic.
  • the illustrated in Fig. 3 embodiment differs from the embodiment of FIG. 2 only in that the self-supporting layer 4 is provided on its hood 3 side facing at least partially with a beard foam layer 7.
  • the rigid foam layer 7 is used in particular for passive accident protection in the event of a pedestrian impact on the hood 3 and is preferably arranged above the engine block. It absorbs a significant part of the impact energy and thus reduces the risk of injury to the impacting pedestrian.
  • the thickness of the hard foam layer 7 is preferably in the range of 10 to 30 mm. It may consist in particular of expanded polypropylene (EPP).
  • FIG. 4 another embodiment of an engine hood panel according to the invention 1 '' is shown.
  • a layer 8 of open-celled melamine resin foam is arranged between the covering layer 5 and the self-supporting layer 4 made of wood fibers and thermoplastic fibers.
  • the thickness of the melamine resin foam layer 8 is in the range of 3 to 8 mm.
  • Their density is in the range of only 7 to 12 kg / m 3 . It is preferably hydrophobic and oliophop equipped.
  • the melamine resin foam layer 8 offers excellent sound absorption in the medium and high frequency ranges. Their length-related flow resistance is in the range of 8 to 20 kNs / m 4 .
  • the melamine resin foam layer 8 is flame resistant and. has a long-term service temperature above 150 0 C. Short-term peak temperature loads of up to about 200 0 C can cope with the hood trim 1 '' without problems.
  • FIG. 5 A further embodiment of the hood trim 1 according to the invention is shown in Fig. 5.
  • the bonnet cover is partially laminated with aluminum foil 9.
  • the heat-reflecting aluminum foil 9 also acts as a sound absorber. It is microperforated for this purpose.
  • the perforation diameter of the perforation is preferably in the range of 0.03 and 1 mm.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Superstructure Of Vehicle (AREA)

Abstract

L'invention concerne un habillage (1) de capot moteur à action acoustique pour un véhicule automobile, comprenant une couche (4) autoporteuse et une couche (5) de protection reliée avec celle-ci et disposée du côté du moteur. Pour qu'un tel habillage (1) de capot moteur offre un effet d'insonorisation satisfaisant avec des coûts de fabrication considérablement réduits, il est prévu selon l'invention d'utiliser comme couche (4) autoporteuse une pièce moulée sous pression en fibres de bois et en fibres thermoplastiques qui, avec une épaisseur de couche comprise entre 1 et 3,5 mm, est au moins partiellement perméable à l'air et présente dans au moins une section de la surface perméable à l'air une résistance à l'écoulement comprise entre 10 et 800 kNs/m², les fibres thermoplastiques présentant une température de fusion supérieure à 1600 °C et la couche (5) de protection utilisée étant une étoffe de fibres synthétiques perméable à l'air.
PCT/EP2007/052663 2006-04-18 2007-03-20 Habillage de capot moteur WO2007122045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610018090 DE102006018090B3 (de) 2006-04-18 2006-04-18 Motorhaubenverkleidung
DE102006018090.9 2006-04-18

Publications (1)

Publication Number Publication Date
WO2007122045A1 true WO2007122045A1 (fr) 2007-11-01

Family

ID=38120311

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/052663 WO2007122045A1 (fr) 2006-04-18 2007-03-20 Habillage de capot moteur

Country Status (2)

Country Link
DE (1) DE102006018090B3 (fr)
WO (1) WO2007122045A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108100045A (zh) * 2017-12-15 2018-06-01 武汉理工大学 一种含预埋功能附件的碳纤维增强复合材料汽车引擎盖

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010002049B4 (de) * 2010-02-17 2019-06-27 Röchling Automotive AG & Co. KG Akustisch absorbierend wirksames KFZ-Innenverkleidungsbauteil
FR3061518B1 (fr) * 2017-01-05 2019-05-31 Treves Products, Services & Innovation Ecran de protection acoustique pour moteur de vehicule automobile
EP3409922B1 (fr) * 2017-05-17 2020-03-11 BDD Beteiligungs GmbH Revêtement isolant
DE102019108937B4 (de) * 2019-04-05 2021-08-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Abdeckhauben für einen Fahrzeugraum

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442014A1 (de) * 1993-11-29 1995-06-01 Greiner & Soehne C A Mehrlagiges Bauelement
DE19602551C1 (de) * 1996-01-25 1997-08-07 Asglawo Gmbh Stoffe Zum Daemme Matte für die Herstellung selbsttragender Formteile durch Warmumformung
US20030124314A1 (en) * 2001-12-31 2003-07-03 Michael Rajendran S. Structurally enhanced sound and heat energy absorbing liner and related method
DE202004005948U1 (de) * 2004-04-13 2005-08-25 Carcoustics Tech Center Gmbh Sandwichartig aufgebauter Luftschallabsorber

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3534690A1 (de) * 1985-09-28 1987-06-19 Greiner & Soehne C A Selbsttragende schalldaemmplatte
DE10318136B3 (de) * 2003-04-17 2004-10-07 Carcoustics Tech Center Gmbh Aus Korkpartikeln und wärmereaktivem Bindemittel gebildeter poröser Schallabsorber und Verfahren zu dessen Herstellung
DE10324257B3 (de) * 2003-05-28 2004-09-30 Clion Ireland Ltd., Newton Schallabsorber, Verfahren zur Herstellung, und Verwendung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442014A1 (de) * 1993-11-29 1995-06-01 Greiner & Soehne C A Mehrlagiges Bauelement
DE19602551C1 (de) * 1996-01-25 1997-08-07 Asglawo Gmbh Stoffe Zum Daemme Matte für die Herstellung selbsttragender Formteile durch Warmumformung
US20030124314A1 (en) * 2001-12-31 2003-07-03 Michael Rajendran S. Structurally enhanced sound and heat energy absorbing liner and related method
DE202004005948U1 (de) * 2004-04-13 2005-08-25 Carcoustics Tech Center Gmbh Sandwichartig aufgebauter Luftschallabsorber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108100045A (zh) * 2017-12-15 2018-06-01 武汉理工大学 一种含预埋功能附件的碳纤维增强复合材料汽车引擎盖

Also Published As

Publication number Publication date
DE102006018090B3 (de) 2007-08-30

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