DE10247425A1 - Front bonnet structure for motor vehicles is of sandwich-construction, has cover layer and lower structure with braking points, and intermediate energy-absorbent layer of metal/plastic - Google Patents
Front bonnet structure for motor vehicles is of sandwich-construction, has cover layer and lower structure with braking points, and intermediate energy-absorbent layer of metal/plastic Download PDFInfo
- Publication number
- DE10247425A1 DE10247425A1 DE2002147425 DE10247425A DE10247425A1 DE 10247425 A1 DE10247425 A1 DE 10247425A1 DE 2002147425 DE2002147425 DE 2002147425 DE 10247425 A DE10247425 A DE 10247425A DE 10247425 A1 DE10247425 A1 DE 10247425A1
- Authority
- DE
- Germany
- Prior art keywords
- substructure
- plastic
- metal
- cover layer
- front hood
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
- B62D25/105—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles for motor cars
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Superstructure Of Vehicle (AREA)
- Laminated Bodies (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Die Erfindung betrifft eine Fronthaubenstruktur für ein Kraftfahrzeug nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a bonnet structure for a Motor vehicle according to the preamble of patent claim 1.
Eine solche Fronthaubenstruktur ist
beispielsweise aus der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Fronthaubenstruktur für ein Kraftfahrzeug der eingangs genannten Art zu schaffen, welche den Fußgängerschutz erhöht.The present invention is the object of a front hood structure for a motor vehicle of the beginning to create said type, which increases the pedestrian protection.
Diese Aufgabe wird durch eine Fronthaubenstruktur mit den Merkmalen des Anspruchs 1 gelöst.This task is accomplished by a bonnet structure solved with the features of claim 1.
Die erfindungsgemäße Fronthaubenstruktur, beispielsweise eine Motorhaubenstruktur, ist sandwichartig aus drei Materialschichten, einer Deckschicht, einer Unterstruktur und einer Zwischenlage, zusammengesetzt. Die Deckschicht der Fronthaubenstruktur bildet gleichzeitig deren Außenhaut. Die Unterstruktur ist einem Innenraum zugewandt und weist erfindungsgemäß örtliche Sollbruchstellen auf. Wenn im Zusammenhang mit der Erfindung von Sollbruchstellen die Rede ist, so sind damit Bereiche der Unterstruktur gemeint, die bei Krafteinwirkungen auf die Fronthaubenstruktur zu einem Werkstoffversagen führen. Dieses Versagen aktiviert andere Schichten der Sandwichstrüktur, die Energie absorbieren können, wie beispielsweise die energieabsorbierende Zwischenlage. Im Falle einer Krafteinwirkung auf die Fronthaube, wird die Fronthaube gegen darunterliegende Bauteile gedrückt. Bei einer Krafteinwirkung, die ein vorbestimmtes Maß überschreitet, versagt die Unterstruktur im Bereich der Krafteinwirkung an den materialgeschwächten Stellen, sobald die Bauteile ihr einen bestimmten Widerstand entgegensetzen. Das Versagen der Unterstruktur ermöglicht das Einleiten der Kraft in die Zwischenlage, wobei diese zusammengestaucht wird. Dabei wird Aufprallenergie absorbiert. Da die Unterstruktur mit den Sollbruchstellen dem Innenraum zugewandt ist, entstehen bei einem Aufprall an der Außenhaut der Fronthaube keine scharfen Kanten. Dadurch wird die Verletzungsgefahr bei einem Fußgängeraufprall erheblich reduziert.The front hood structure according to the invention, for example a hood structure, is sandwiched by three layers of material, a cover layer, a substructure and an intermediate layer, composed. The cover layer of the bonnet structure forms at the same time Outer skin. The substructure faces an interior and has local according to the invention Breaking points on. When in connection with the invention of Predetermined breaking points, so are thus areas of the substructure meant that when forces on the bonnet structure to cause a material failure. This failure activates other layers of the sandwich structure, the Can absorb energy, such as the energy absorbing liner. In the event of a force on the bonnet, the bonnet is against underlying components pressed. At a force that exceeds a predetermined level, fails the substructure in the area of the force at the material-weakened sites, as soon as the components oppose it a certain resistance. The Failure of the substructure allows the introduction of the force in the intermediate layer, wherein this compressed becomes. In this case, impact energy is absorbed. Because the substructure with the predetermined breaking points facing the interior arise in a collision on the outer skin the bonnet does not have sharp edges. This will increase the risk of injury in a pedestrian impact considerably reduced.
Nach dem Brechen der Unterstruktur wird die Aufprallenergie hauptsächlich durch die Zwischenlage absorbiert. So wird es möglich, eine örtlich gezielte Energieabsorption durchzuführen, welche durch die Sollbruchstellen begrenzt ist. Sollbruchstellen haben darüber hinaus den Vorteil, daß sie leicht auszulegen sind, wodurch auf einfache Weise das Kraftniveau eingestellt werden kann, ab dem die Zwischenlage aktiviert wird. Es können auch Sollbruch- und Sollknickstellen in die Unterstruktur eingebracht werden. In diesem Fall findet bei Krafteinleitung auch eine Verformung der Unterstruktur statt.After breaking the substructure the impact energy becomes major absorbed by the liner. So it becomes possible, a locally targeted Perform energy absorption, which is limited by the predetermined breaking points. Predetermined breaking points have about it in addition, the advantage that they are easy to interpret, which in a simple way the force level can be adjusted, from which the liner is activated. It can Also predetermined breaking and predetermined bending points introduced into the substructure become. In this case, when force is introduced also a deformation the substructure instead.
Vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.Advantageous embodiments are the dependent claims refer to.
Die Deckschicht kann aus einem Faserverbundwerkstoff, wie beispielsweise einer Glasfasermatte, Kunststoff und/oder Metall bestehen. Wenn die Deckschicht die Außenhaut darstellt, hat Metall den Vorteil, daß es gut lackierbar ist und durch Tief ziehen geformt werden kann. Bei faserverstärkten Werkstoffen können die Werkstoffeigenschaften individuell auf bekannte Art und Weise, beispielsweise über die Ausrichtung der eingebrachten Fasern, gestaltet und an die gewünschten Anforderungen angepaßt werden. Kunststoffe haben ein gutes Verformungsverhalten und ein geringes Gewicht, was ebenfalls erhebliche Vorteile bei der Auslegung von Fronthaubenstrukturen mit sich bringt.The cover layer may be made of a fiber composite material, such as a fiberglass mat, plastic and / or metal consist. If the cover layer is the outer skin, metal has the Advantage that it is well paintable and can be formed by deep drawing. at fiber reinforced materials can the material properties individually in a known manner, for example about the orientation of the introduced fibers, designed and to the desired Adapted requirements become. Plastics have a good deformation behavior and a low weight, which also considerable advantages in the design of front hood structures.
Für die Unterstruktur kommen ebenfalls Materialien, wie Faserverbundwerkstoff, Kunststoff und/oder Metall in Frage.For the substructure also come materials, such as fiber composite, Plastic and / or metal in question.
Die Zwischenlage kann beispielsweise aus Metall und/oder Kunststoff gefertigt werden. Die Form kann schaum-, waben- oder rippenförmig sein. Metalle und Kunststoffe bieten den Vorteil, daß sich Stegformen und Abstände einzelner Rippen bzw. Waben einfach variieren lassen. So kann über die Struktur der Zwischenlage auf besonders einfache Art und Weise das Maß der Energieabsorption der Zwischenlage eingestellt werden. Bei Schäumen läßt sich das Maß der Energieabsorption beispielsweise ohne großen Aufwand über deren Dichte verändern. Es sind auch andere Materialien denkbar, wie beispielsweise Pappe.The liner can, for example made of metal and / or plastic. The mold can be foamy, honeycomb or ribbed his. Metals and plastics offer the advantage that web forms and distances single ribs or honeycombs can vary easily. So can about the structure the liner in a particularly simple way the degree of energy absorption the liner are set. With foams, the degree of energy absorption can be for example, without large Effort over change their density. It Other materials are conceivable, such as cardboard.
Bei einer Unterstruktur aus faserverstärkten Kunststoffen können die lokalen Materialschwächungen über lokal veränderte Faserstrukturen entstehen. Durch eine bestimmte Ausrichtung oder eine Unterbrechung der in die faserverstärkten Kunststoffe eingebrachten Fasern können auf einfache Art und Weise Materialschwächungen hergestellt werden. Bei einer Faserunterbrechung werden beispielsweise Fasermatten in Streifen oder Rechtecke geschnitten. Diese Streifen bzw. Rechtecke werden nebeneinander gelegt, ohne daß sie sich überdecken, so daß Bereiche ohne Fasern entstehen, und anschließend mit Harz getränkt. Die Fasermatten können vor dem Tränken mit Harz auch eingeritzt werden, so daß Bereiche mit weniger Fasern entstehen.In a substructure made of fiber-reinforced plastics, the local weakening of the material may be caused by locally altered fiber structures. By a certain orientation or an interruption of the fibers introduced into the fiber-reinforced plastics material weakenings can be produced in a simple manner. In a fiber interruption, for example, fiber mats are cut into strips or rectangles. These strips or rectangles are placed side by side, without overlapping, so that areas without fibers arise, and then impregnated with resin. The fiber mats may also be scored with resin prior to impregnation so that Be rich with fewer fibers.
Desweiteren können sowohl bei Unterstrukturen aus Faserverbundwerkstoffen als auch aus Kunststoff oder Metall die Materialschwächungen durch verringerte Querschnitte, wie beispielsweise eingeritzte oder eingeätzte Nuten, realisiert werden. Es können auch tiefere Vorschädigungen/Schwächungen in die Unterstruktur eingebracht werden als durch Ritzen oder Ätzen. Die lokalen Sollbruchstellen können durch diese Verfahrensschritte nach der Fertigstellung der Fronthaubenstruktur in die Unterstruktur eingebracht werden. So kann die Fronthaube auf einfache Art und Weise individuell an verschiedenste Anforderungen angepaßt werden, wie beispielsweise unterschiedliche Aggregate im Innenraum.Furthermore, both substructures made of fiber composites as well as plastic or metal the material weakenings reduced cross sections, such as scribed or etched grooves, will be realized. It can also deeper previous damage / weakening be introduced into the substructure as by scribing or etching. The local breaking points can through these process steps after completion of the bonnet structure be introduced into the substructure. So can the front hood in a simple way individually to the most diverse requirements customized be such as different units in the interior.
Im folgenden wird die erfindungsgemäße Fronthaubenstruktur anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:The following is the front hood structure according to the invention explained in more detail with reference to the embodiment shown in the drawing. It demonstrate:
In
In
Im folgenden wird die Funktionsweise
der Fronthaubenstruktur
Im Falle einer Krafteinwirkung F
von außen auf
die Fronthaubenstruktur
Trifft die Unterstruktur
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002147425 DE10247425A1 (en) | 2002-10-11 | 2002-10-11 | Front bonnet structure for motor vehicles is of sandwich-construction, has cover layer and lower structure with braking points, and intermediate energy-absorbent layer of metal/plastic |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002147425 DE10247425A1 (en) | 2002-10-11 | 2002-10-11 | Front bonnet structure for motor vehicles is of sandwich-construction, has cover layer and lower structure with braking points, and intermediate energy-absorbent layer of metal/plastic |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10247425A1 true DE10247425A1 (en) | 2004-04-22 |
Family
ID=32038509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE2002147425 Ceased DE10247425A1 (en) | 2002-10-11 | 2002-10-11 | Front bonnet structure for motor vehicles is of sandwich-construction, has cover layer and lower structure with braking points, and intermediate energy-absorbent layer of metal/plastic |
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DE (1) | DE10247425A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2874530A1 (en) * | 2004-09-02 | 2006-03-03 | Inoplast Sa | PLASTIC MATERIAL USED IN PARTICULAR FOR MAKING FLOORS OF MOTOR VEHICLES AND FLOOR OF A MOTOR VEHICLE PRODUCED WITH SUCH MATERIAL |
DE102005033949A1 (en) * | 2004-07-20 | 2006-06-08 | Magna Steyr Fahrzeugtechnik Ag & Co. Kg | Engine hood for motor vehicle, has honeycomb plates with areas forming different thickness and hardness, and reference offset area provided crosswise over whole width of hood, where offset area is attained by attenuating hood structure |
DE102006061616A1 (en) * | 2006-12-27 | 2008-07-03 | Volkswagen Ag | Plastic component for motor vehicle, has predetermined breaking point, which is formed by flange shaped protrusion and/or offset of component with contact surface, in potentially impact loaded component section |
EP2008884A1 (en) * | 2007-06-28 | 2008-12-31 | Ford Global Technologies, LLC | Bonnet for Motor Vehicles |
US7690722B2 (en) * | 2007-05-21 | 2010-04-06 | Honda Motor Co., Ltd. | Energy absorbing vehicle hood stopper assembly |
DE102010051834A1 (en) * | 2010-11-18 | 2012-05-24 | Volkswagen Ag | Front flap for motor vehicle, has inner sheet that is formed as flat sheet in area of head impact zone, where flat sheet is adhered with an outer sheet directly |
CN101932493B (en) * | 2008-01-31 | 2013-08-07 | 通用汽车环球科技运作公司 | Energy absorbing vehicle hood assembly with asymmetric sandwich inner structure |
US9944331B2 (en) | 2016-06-09 | 2018-04-17 | Ford Global Technologies, Llc | Perforated deformation region for a vehicle hood |
US10791787B2 (en) | 2016-01-06 | 2020-10-06 | GM Global Technology Operations LLC | Local energy absorber |
FR3141416A1 (en) * | 2022-11-02 | 2024-05-03 | Psa Automobiles Sa | BODY ELEMENT AND MOTOR VEHICLE EQUIPPED WITH SUCH A BODY ELEMENT |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19902311A1 (en) * | 1999-01-21 | 2000-07-27 | Volkswagen Ag | Motor vehicle front hood designed as pedestrian protection |
DE19926085A1 (en) * | 1999-06-08 | 2000-12-14 | Walter Extra | Mechanical absorption device especially for pilot's seat in aircraft has absorber plate supported on one component and suspension component supported on another, and suspension component has pin fitting in hole in absorber plate |
DE10062155A1 (en) * | 2000-12-14 | 2002-06-20 | Volkswagen Ag | Automobile motor hood cover has a stiffening structure, bonded to the frame and/or bow by adhesive layers as nominal fracture points, to dampen impact forces on a collision and reduce the head injury criterion for pedestrians |
DE10062164A1 (en) * | 2000-12-14 | 2002-06-20 | Volkswagen Ag | Automobile motor hood cover has a weaker zone at the level of a child's head than at the height of an adult head, to reduce the head injury criterion in the event of an impact collision with a pedestrian |
DE10112657A1 (en) * | 2001-03-16 | 2002-09-26 | Bayerische Motoren Werke Ag | Motor vehicle with at least one hinged hood, in particular engine compartment and / or luggage compartment lid |
-
2002
- 2002-10-11 DE DE2002147425 patent/DE10247425A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19902311A1 (en) * | 1999-01-21 | 2000-07-27 | Volkswagen Ag | Motor vehicle front hood designed as pedestrian protection |
DE19926085A1 (en) * | 1999-06-08 | 2000-12-14 | Walter Extra | Mechanical absorption device especially for pilot's seat in aircraft has absorber plate supported on one component and suspension component supported on another, and suspension component has pin fitting in hole in absorber plate |
DE10062155A1 (en) * | 2000-12-14 | 2002-06-20 | Volkswagen Ag | Automobile motor hood cover has a stiffening structure, bonded to the frame and/or bow by adhesive layers as nominal fracture points, to dampen impact forces on a collision and reduce the head injury criterion for pedestrians |
DE10062164A1 (en) * | 2000-12-14 | 2002-06-20 | Volkswagen Ag | Automobile motor hood cover has a weaker zone at the level of a child's head than at the height of an adult head, to reduce the head injury criterion in the event of an impact collision with a pedestrian |
DE10112657A1 (en) * | 2001-03-16 | 2002-09-26 | Bayerische Motoren Werke Ag | Motor vehicle with at least one hinged hood, in particular engine compartment and / or luggage compartment lid |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005033949A1 (en) * | 2004-07-20 | 2006-06-08 | Magna Steyr Fahrzeugtechnik Ag & Co. Kg | Engine hood for motor vehicle, has honeycomb plates with areas forming different thickness and hardness, and reference offset area provided crosswise over whole width of hood, where offset area is attained by attenuating hood structure |
WO2006027482A1 (en) * | 2004-09-02 | 2006-03-16 | Inoplast | Plastic material that can be used, in particular, for producing motor vehicle floor pans, and motor vehicle floor pan made with such a material |
FR2874530A1 (en) * | 2004-09-02 | 2006-03-03 | Inoplast Sa | PLASTIC MATERIAL USED IN PARTICULAR FOR MAKING FLOORS OF MOTOR VEHICLES AND FLOOR OF A MOTOR VEHICLE PRODUCED WITH SUCH MATERIAL |
DE102006061616A1 (en) * | 2006-12-27 | 2008-07-03 | Volkswagen Ag | Plastic component for motor vehicle, has predetermined breaking point, which is formed by flange shaped protrusion and/or offset of component with contact surface, in potentially impact loaded component section |
US7690722B2 (en) * | 2007-05-21 | 2010-04-06 | Honda Motor Co., Ltd. | Energy absorbing vehicle hood stopper assembly |
EP2008884A1 (en) * | 2007-06-28 | 2008-12-31 | Ford Global Technologies, LLC | Bonnet for Motor Vehicles |
CN101932493B (en) * | 2008-01-31 | 2013-08-07 | 通用汽车环球科技运作公司 | Energy absorbing vehicle hood assembly with asymmetric sandwich inner structure |
DE102010051834A1 (en) * | 2010-11-18 | 2012-05-24 | Volkswagen Ag | Front flap for motor vehicle, has inner sheet that is formed as flat sheet in area of head impact zone, where flat sheet is adhered with an outer sheet directly |
DE102010051834B4 (en) | 2010-11-18 | 2022-05-25 | Volkswagen Ag | Front flap for a motor vehicle |
US10791787B2 (en) | 2016-01-06 | 2020-10-06 | GM Global Technology Operations LLC | Local energy absorber |
DE102017200019B4 (en) | 2016-01-06 | 2021-11-11 | GM Global Technology Operations LLC | COVER WITH LOCAL ENERGY ABSORBER |
US9944331B2 (en) | 2016-06-09 | 2018-04-17 | Ford Global Technologies, Llc | Perforated deformation region for a vehicle hood |
FR3141416A1 (en) * | 2022-11-02 | 2024-05-03 | Psa Automobiles Sa | BODY ELEMENT AND MOTOR VEHICLE EQUIPPED WITH SUCH A BODY ELEMENT |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |