DE19710417A1 - bonnet fitting for vehicle - Google Patents

bonnet fitting for vehicle

Info

Publication number
DE19710417A1
DE19710417A1 DE1997110417 DE19710417A DE19710417A1 DE 19710417 A1 DE19710417 A1 DE 19710417A1 DE 1997110417 DE1997110417 DE 1997110417 DE 19710417 A DE19710417 A DE 19710417A DE 19710417 A1 DE19710417 A1 DE 19710417A1
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DE
Germany
Prior art keywords
front flap
vehicle
collision
pedestrian
event
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
Application number
DE1997110417
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German (de)
Other versions
DE19710417B4 (en
Inventor
Frank Muehlberger
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE1997110417 priority Critical patent/DE19710417B4/en
Publication of DE19710417A1 publication Critical patent/DE19710417A1/en
Application granted granted Critical
Publication of DE19710417B4 publication Critical patent/DE19710417B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • B60R21/38—Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets

Abstract

The bonnet fitting includes a device which in the event of a collision with a pedestrian, moves the bonnet from its initial closed position to a raised position. It includes an energy store device (6), which in normal use supports the opening of the bonnet (1). In the event of a collision with a pedestrian, the energy store device causes the bonnet to be raised. In normal use, the bonnet may be on a horizontal axis (3) at the back, which is released in the event of a collision so that the energy store device raises the rear end of the bonnet.

Description

Die Erfindung bezieht sich auf eine Anordnung einer Frontklappe an einem Fahr­ zeug nach dem Oberbegriff des Anspruchs 1 sowie auf ein Verfahren zur Verlage­ rung einer Frontklappe gemäß Anspruch 6.The invention relates to an arrangement of a front flap on a driver according to the preamble of claim 1 and a method for publishers tion of a front flap according to claim 6.

Um bei einer Kollision eines Fußgängers mit einem Kraftfahrzeug das Ausmaß von Verletzungen, insbesondere im Brust- und Kopfbereich, zu minimieren, ist aus der DE 28 41 315 A1 eine Sicherheitseinrichtung bekannt, die den fahrtrichtungsab­ gewandten hinteren Bereich der Frontklappe im Fall einer Fußgängerkollision anhebt. Hierdurch wird ein Abstand der Frontklappe zur steifen Unterstruktur des Fahrzeuges (Motor, Federbeinaufnahmen etc.) erreicht, so daß an der Frontklappe ein Deformationsweg zur Verfügung steht. Nachteilig ist jedoch, daß eine eigene Einrichtung zur Verlagerung der Frontklappe erforderlich ist, so daß durch die Sicherheitseinrichtung erhebliche Zusatzkosten und ein deutliches Mehrgewicht entstehen.In the event of a collision between a pedestrian and a motor vehicle, the extent of To minimize injuries, especially in the chest and head area, is from the DE 28 41 315 A1 discloses a safety device which detects the direction of travel the rear area of the front flap in the event of a pedestrian collision lifts. This creates a distance between the front flap and the rigid substructure of the Vehicle (engine, strut mounts etc.) reached, so that on the front flap a deformation path is available. The disadvantage, however, is that it has its own Device for relocating the front flap is required so that by the Security device considerable additional costs and a significant additional weight arise.

Aufgabe der Erfindung ist es, eine einfach aufgebaute Anordnung für eine im Fall einer Fußgängerkollision verlagerbare Frontklappe zu schaffen.The object of the invention is to provide a simple structure for a case to create a movable front flap in a pedestrian collision.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Anspruch 6 zeigt ein Verfahren zur Verlagerung einer Frontklappe auf. This object is solved by the features of claim 1. Claim 6 shows a procedure for relocating a bonnet.  

Durch die gemäß Anspruch 1 erfindungsgemäß erreichte Doppelfunktion der energiespeichernden Einrichtung ist keine eigene Antriebseinrichtung zur Verlage­ rung der Frontklappe erforderlich. Durch das Heranziehen der sowieso vorhan­ denen Einrichtung zur Unterstützung der Öffnungsbewegung der Frontklappe kann mit nur sehr geringem Zusatzaufwand die Verlagerung der Frontklappe bei einer Fußgängerkollision realisiert werden. Außerdem wird nur wenig zusätzlicher Bau­ raum benötigt, bei gleichzeitig geringem Mehrgewicht. Im Unterschied zu Sicher­ heitseinrichtungen, die ausschließlich für den Notfall konzipiert sind, zeichnet sich die erfindungsgemäße Lösung durch eine hohe Zuverlässigkeit aus, da sie im Normalbetrieb des Fahrzeugs in unregelmäßigen Zeitabständen benutzt und damit gangbar gehalten wird.Due to the dual function of the invention achieved according to claim 1 Energy-storing device is not a separate drive device for publishers Front flap required. By pulling the existing anyway which can support the opening movement of the front flap relocating the front flap of one with very little additional effort Pedestrian collision can be realized. In addition, there is little additional construction space required, while at the same time adding little weight. Unlike Safe Safety facilities that are designed exclusively for emergencies stand out the solution according to the invention from a high reliability, since it in Normal operation of the vehicle used at irregular intervals and therefore is kept feasible.

Neben energiespeichernden Einrichtungen (z. B. Federn - siehe auch Ansprüche 4 und 5) können grundsätzlich auch Energie erzeugende Einrichtungen, wie bei­ spielsweise elektrische, hydraulische oder pneumatische Antriebe, die erfindungs­ gemäße Doppelfunktion wahrnehmen.In addition to energy storage devices (e.g. springs - see also claims 4 and 5) can in principle also energy generating devices, such as in for example, electrical, hydraulic or pneumatic drives, the invention perform a dual function.

Im Bereich der Windschutzscheibe angeschlagene Frontklappen (Anspruch 2) sind weit verbreitet, um den Zugang zum Motor- oder Gepäckraum von der Vorderseite des Fahrzeuges her zu ermöglichen. Um eine Verlagerung des fahrtrichtungsab­ gewandten Endabschnittes der Frontklappe zu ermöglichen, wird die hintenlie­ gende Schwenkachse der Frontklappe im Fall einer Fußgängerkollision freigege­ ben und kann nach oben verlagert werden. Dieses einfache Wirkprinzip gemäß Anspruch 2 ist mit geringem Aufwand umsetzbar. Die am vorderen Endabschnitt der Fahrzeugkarosserie befindliche Verriegelungseinrichtung für die Frontklappe bildet im Kollisionsfall die Drehachse für die Verlagerung, was aufgrund des Spiels in der Verriegelungseinrichtung in der Regel ohne weitere Zusatzmaßnahmen möglich ist.In the area of the windshield hinged front flaps (claim 2) widely used for access to the engine or luggage compartment from the front of the vehicle. To shift the direction of travel to enable the facing end section of the front flap, the rear free pivot axis of the front flap in the event of a pedestrian collision ben and can be shifted upwards. This simple principle of action according Claim 2 can be implemented with little effort. The one at the front end section locking device for the front flap of the vehicle body in the event of a collision, the axis of rotation for the shift, which is due to the game in the locking device usually without any additional measures is possible.

Selbstverständlich kann die Erfindung sinngemäß auch bei frontseitig angeschla­ genen Frontklappen eingesetzt werden. Da insbesondere der Kopf eines Fußgän­ gers bei einer Kollision mit einem Fahrzeug häufig im hinteren Bereich der Front­ klappe auftrifft, ist die Lösung gemäß Anspruch 2 vorteilhafter. Außerdem wird durch eine Anhebung des rückwärtigen Bereichs der Frontklappe das Risiko für einen Fußgänger, mit dem Kopf auf die (Antriebswellen der) Scheibenwischer auf­ zutreffen, deutlich vermindert.Of course, the invention can also be done in the same way at the front be used front flaps. Because in particular the head of a pedestrian In the event of a collision with a vehicle, this often occurs in the rear area of the front flap hits, the solution according to claim 2 is more advantageous. Besides, will by raising the rear area of the front door the risk for  a pedestrian, with his head on the (drive shaft of) the wipers apply, significantly reduced.

Da im Normalbetrieb der Frontklappe die hintenliegende Scharniereinrichtung die Führung und Fixierung der Frontklappe bewerkstelligt, diese Scharniereinrichtung jedoch bei einer Fußgängerkollision erfindungsgemäß außer Eingriff gesetzt wird, sieht Anspruch 3 eine zusätzliche Einrichtung zur Führung der Frontklappe vor, die unter allen Umständen ein Loslösen der Frontklappe vom Kraftfahrzeug verhindert. Die energiespeichernde Einrichtung ist für diese Anforderung in der Regel nicht ausgebildet, ebensowenig wie die Verriegelung der Frontklappe am vorderen En­ dabschnitt der Fahrzeugkarosserie. Daneben kommt der Führungseinrichtung ge­ mäß Anspruch 3 die Funktion einer Wegbegrenzung bei einer Verlagerung der Frontklappe im Fall einer Fußgängerkollision zu.Since in normal operation the front flap the rear hinge device This hinge device manages and fixes the front flap is however disengaged according to the invention in a pedestrian collision, Claim 3 provides an additional device for guiding the front flap, the prevents detachment of the bonnet from the motor vehicle under all circumstances. The energy storage device is usually not for this requirement trained, just as little as the locking of the front flap on the front En d section of the vehicle body. In addition, the management facility comes according to claim 3, the function of a path limitation when the Front flap closed in the event of a pedestrian collision.

Mechanische Federn gemäß Anspruch 4 sind kostengünstig herzustellen, einfach im Aufbau, setzen die gespeicherte Energie innerhalb kurzer Zeit frei und sind auch nach längerem Nichtgebrauch mit großer Zuverlässigkeit funktionsfähig. Außerdem kann bei kleineren Kollisionen und bei Fehlauslösungen das System ohne weiteres in seine Ausgangslage zurückgebracht werden, indem die Feder manuell (beispielsweise durch Niederdrücken der hinteren Kante der Frontklappe) wieder in ihre gespannte Lage gebracht wird.Mechanical springs according to claim 4 are inexpensive to manufacture, simple under construction, release the stored energy within a short time and are Functionally reliable even after long periods of non-use. The system can also be used for minor collisions and false triggers can be easily returned to its original position by the spring manually (e.g. by depressing the rear edge of the front flap) is brought back into its tense position.

In vielen Fällen sind Gasfedern zur Unterstützung der Öffnungsbewegung einer Frontklappe vorgesehen (Anspruch 5). Bei der erfindungsgemäßen Verwendung der Gasfeder auch zur Verlagerung der Frontklappe bei einer Fußgängerkollision ist diese so auszulegen, daß die Verlagerungsbewegung mit der geforderten Ge­ schwindigkeit erfolgt. Außerdem ist im Rahmen der regelmäßigen Wartung des Kraftfahrzeuges die Dichtigkeit und die Funktionsfähigkeit der Gasfeder zu über­ prüfen.In many cases, gas springs to support the opening movement are one Front flap provided (claim 5). When using the invention the gas spring also for relocating the front flap in the event of a pedestrian collision is this to be interpreted so that the relocation movement with the required Ge speed occurs. It is also part of the regular maintenance of the Motor vehicle to the tightness and functionality of the gas spring check.

Durch das Verfahren gemäß Anspruch 6 wird sichergestellt, daß die Verlagerung der Frontklappe abgeschlossen ist, bevor der Aufprall des Fußgängers auf die Frontklappe erfolgt. Hierdurch wird verhindert, daß die emporschnellende Front­ klappe dem Fußgänger mit erhöhter Geschwindigkeit entgegenkommt und dadurch das Verletzungsrisiko erhöhen würde. Außerdem wird gewährleistet, daß zum Zeit­ punkt des Fußgängeraufpralls an der Frontklappe bereits der maximale Deforma­ tionsweg zur Verfügung steht und die energiespeichernde Einrichtung in der An­ fangsphase des Fußgängeraufpralls einer Rückverlagerung der Frontklappe einen möglichst geringen Widerstand entgegensetzt (weich einsetzender Abbau der kinetischen Energie).The method according to claim 6 ensures that the relocation the front flap is closed before the pedestrian hits the Front flap is done. This prevents the soaring front flap meets the pedestrian at increased speed and thereby  would increase the risk of injury. It also ensures that at the moment point of pedestrian impact on the front flap is already the maximum deforma tion path is available and the energy storage facility in the An initial phase of the pedestrian impact of moving the front flap back opposed as little resistance as possible (soft onset degradation of the kinetic energy).

Ein mögliches Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend näher beschrieben. Die einzige Figur zeigt den Frontbereich eines Kraftfahrzeuges in schematisierter Seitenansicht.A possible embodiment of the invention is shown in the drawing and is described in more detail below. The only figure shows the front area a motor vehicle in a schematic side view.

Die Frontklappe 1 eines Kraftfahrzeugs ist über ein - in Fahrtrichtung FR betrach­ tet- hintenliegendes Scharnier 2 drehbar an der Karosserie des Kraftfahrzeuges gelagert. Die geschlossene Lage der Frontklappe 1 ist mit einer durchgezogenen Linie dargestellt, während die gepunktete Linie die Position der zum Zwecke des Zugangs zum Motorraum geöffneten Frontklappe 1 wiedergibt. Die Verlagerung der Frontklappe 1 im Fall einer Fußgängerkollision ist mit einer strichlierten Linie veranschaulicht.The front flap 1 of a motor vehicle is rotatably mounted on the body of the motor vehicle via a hinge 2 located behind in the direction of travel FR. The closed position of the front flap 1 is shown with a solid line, while the dotted line represents the position of the front flap 1 open for the purpose of access to the engine compartment. The displacement of the front flap 1 in the event of a pedestrian collision is illustrated by a dashed line.

Die Schwenkbewegung der Frontklappe 1 im Normalfall wird über das Scharnier 2, das eine hintere Drehachse 3 festlegt, bewerkstelligt (Schwenkpfeil 4). Die ge­ schlossene Frontklappe 1 wird durch eine vorderseitige Frontklappenverriegelung 5 in ihrer Lage gehalten. Durch Lösen dieser Frontklappenverriegelung 5 wird die Frontklappe 1 geöffnet, wobei die Öffnungsbewegung durch eine Gasfeder 6 un­ terstützt wird. Die Gasfeder 6 ist an einem vorderen, frontklappenseitigen Anlenk­ punkt 7 sowie einem hinteren Anlenkpunkt 8 festgelegt. Dieser Anlenkpunkt 8 be­ findet sich an dem einen Endabschnitt eines ersten Führungsarms 9, der während der normalen Öffnungsbewegung der Frontklappe 1 seine Lage nicht ändert. An den ersten Führungsarm 9 ist über ein Gelenk 11 ein zweiter Führungsarm 10 an­ gebunden, wobei das Gelenk 11 im Scharnier 2 fixiert ist. Der andere Endabschnitt des Führungsarmes 10 ist gelenkig mit dem vorderen Anlenkpunkt 7 der Gasfeder 6 verbunden. Der Führungsarm 10 wird während der normalen Öffnungsbewegung der Frontklappe 1 mitverschwenkt, ohne seine etwa parallele Lage zur Frontklappe 1 zu verändern. Die Gasfeder 6 unterstützt unter Vergrößerung ihrer Länge die Öffnungsbewegung der Frontklappe 1.The pivoting movement of the front flap 1 is normally accomplished via the hinge 2 , which defines a rear axis of rotation 3 (pivot arrow 4 ). The closed front flap 1 is held in place by a front flap lock 5 . By releasing this front flap lock 5 , the front flap 1 is opened, the opening movement being supported by a gas spring 6 . The gas spring 6 is fixed to a front, flap-side pivot point 7 and a rear pivot point 8 . This articulation point 8 be found on one end portion of a first guide arm 9 , which does not change its position during the normal opening movement of the front flap 1 . A second guide arm 10 is bound to the first guide arm 9 via a joint 11 , the joint 11 being fixed in the hinge 2 . The other end section of the guide arm 10 is articulated to the front pivot point 7 of the gas spring 6 . The guide arm 10 is also pivoted during the normal opening movement of the front flap 1 without changing its approximately parallel position to the front flap 1 . The gas spring 6 supports the opening movement of the front flap 1 by increasing its length.

Im Fall einer Kollision des Fahrzeugs mit einem Fußgänger steuert eine im Bereich des vorderen Stoßfängers 12 des Kraftfahrzeuges angeordnete Sensoreinrichtung 13 über eine elektronische Steuerungseinrichtung 14 eine Entriegelungseinrichtung 15 an. Die Einrichtungen 13 und 14 sind dabei so ausgelegt, daß andere Kollisi­ onsfälle, wie z. B. "Parkrempler", erkannt und Fehlauslösungen des Systems ver­ mieden werden. Die Entriegelungseinrichtung 15 bewirkt, daß sich die Drehachse 3 der Frontklappe 1 aus dem Scharnier 2 löst und gleichzeitig das Gelenk 11 freige­ geben wird. Durch die Expansion des Gasvolumens in der Gasfeder 6 wird die Frontklappe 1 an ihrem rückwärtigen Bereich in Pfeilrichtung 16 nach oben verla­ gert. Hierbei führen die beiden Führungsarme 9 und 10 die Frontklappe 1. In ihrer annähernd gestreckten Endlage begrenzen die Arme 9 und 10 zudem den Verla­ gerungsweg. Die Frontklappenverriegelung 5 bildet während der Verlagerung der Frontklappe 1 eine vordere Drehachse 17. Um sicherzustellen, daß die Verriege­ lung 5 in jedem Fall ordnungsgemäß einrastet, ist eine Kontrolleinrichtung 18 vor­ gesehen.In the event of a collision of the vehicle with a pedestrian, a sensor device 13 arranged in the area of the front bumper 12 of the motor vehicle controls an unlocking device 15 via an electronic control device 14 . The facilities 13 and 14 are designed so that other collision cases, such as. B. "Parkrempler" recognized and false triggers of the system avoided ver. The unlocking device 15 causes the axis of rotation 3 of the front flap 1 to be released from the hinge 2 and, at the same time, the joint 11 will be released. Due to the expansion of the gas volume in the gas spring 6 , the front flap 1 is moved upward at its rear region in the direction of the arrow 16 . The two guide arms 9 and 10 guide the front flap 1 . In their approximately extended end position, the arms 9 and 10 also limit the displacement path. The front flap lock 5 forms a front axis of rotation 17 during the displacement of the front flap 1 . In order to ensure that the locking 5 properly engages in any case, a control device 18 is seen before.

Claims (6)

1. Anordnung einer Frontklappe an einem Fahrzeug, mit einer Einrichtung, die bei einer Kollision des Fahrzeugs mit einem Fußgänger die Frontklappe aus ihrer geschlossenen Ausgangslage in eine angehobene Position verlagert, dadurch gekennzeichnet, daß eine energiespeichernde Einrichtung (6) vor­ gesehen ist, die einerseits im Normal betrieb des Fahrzeugs das Öffnen der Frontklappe (1) unterstützt und andererseits im Fall einer Kollision des Fahr­ zeugs mit einem Fußgänger das Anheben der Frontklappe (1) bewirkt.1. Arrangement of a front flap on a vehicle, with a device which, in the event of a collision of the vehicle with a pedestrian, shifts the front flap from its closed starting position into a raised position, characterized in that an energy-storing device ( 6 ) is seen before, on the one hand supports the opening of the front flap ( 1 ) during normal operation of the vehicle and, on the other hand, causes the front flap ( 1 ) to be raised in the event of a collision of the vehicle with a pedestrian. 2. Anordnung einer Frontklappe nach Anspruch 1, dadurch gekennzeichnet, daß die Frontklappe (1) im Normalbetrieb über eine - in Fahrtrichtung (FR) betrachtet - hintenliegende horizontale Achse (3) ver­ schwenkbar ist, wobei die Schwenkachse (3) im Fall einer Kollision des Fahr­ zeugs mit einem Fußgänger freigegeben wird und die energiespeichernde Einrichtung (6) die Frontklappe (1) an ihrem - in Fahrtrichtung (FR) betrachtet - hintenliegenden Abschnitt anhebt.2. Arrangement of a front flap according to claim 1, characterized in that the front flap ( 1 ) in normal operation over a - viewed in the direction of travel (FR) - rear horizontal axis ( 3 ) is pivotable ver, the pivot axis ( 3 ) in the event of a collision the vehicle is released with a pedestrian and the energy-storing device ( 6 ) raises the front flap ( 1 ) at its rear section, viewed in the direction of travel (FR). 3. Anordnung einer Frontklappe nach Anspruch 2, dadurch gekennzeichnet, daß eine Einrichtung (9, 10, 11) zur Führung der Frontklappe (1) bei freigegebener Schwenkachse (3) vorgesehen ist. 3. Arrangement of a front flap according to claim 2, characterized in that a device ( 9 , 10 , 11 ) for guiding the front flap ( 1 ) is provided with a released pivot axis ( 3 ). 4. Anordnung einer Frontklappe nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß die energiespeichernde Einrichtung von einer mechanischen Feder gebildet wird.4. Arrangement of a front flap according to one of the preceding claims, characterized in that the energy storage device by a mechanical spring is formed. 5. Anordnung einer Frontklappe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß energiespeichernde Einrichtung von einer Gasfeder (6) gebildet wird.5. Arrangement of a front flap according to one of claims 1 to 3, characterized in that energy-storing device is formed by a gas spring ( 6 ). 6. Verfahren zur Verlagerung einer Frontklappe eines Fahrzeugs im Fall einer Kollision mit einem Fußgänger, wobei eine im Frontbereich des Fahrzeugs angeordnete Sensoreinrichtung die Kollision erkennt und die Verlagerung der Frontklappe einleitet, dadurch gekennzeichnet, daß die Verlagerung der Frontklappe (1) im we­ sentlichen abgeschlossen ist, bevor insbesondere der Kopf des Fußgängers auf die Frontklappe (1) auftrifft.6. A method for displacing a front flap of a vehicle in the event of a collision with a pedestrian, wherein a sensor device arranged in the front region of the vehicle detects the collision and initiates the displacement of the front flap, characterized in that the displacement of the front flap ( 1 ) is essentially completed before the head of the pedestrian hits the front flap ( 1 ).
DE1997110417 1997-03-13 1997-03-13 Arrangement of a front flap on a vehicle Expired - Fee Related DE19710417B4 (en)

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Application Number Priority Date Filing Date Title
DE1997110417 DE19710417B4 (en) 1997-03-13 1997-03-13 Arrangement of a front flap on a vehicle

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Application Number Priority Date Filing Date Title
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DE19710417B4 DE19710417B4 (en) 2008-04-03

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