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DE2841315A1 - SAFETY DEVICE FOR PROTECTING PEDESTRIAN - Google Patents

SAFETY DEVICE FOR PROTECTING PEDESTRIAN

Info

Publication number
DE2841315A1
DE2841315A1 DE19782841315 DE2841315A DE2841315A1 DE 2841315 A1 DE2841315 A1 DE 2841315A1 DE 19782841315 DE19782841315 DE 19782841315 DE 2841315 A DE2841315 A DE 2841315A DE 2841315 A1 DE2841315 A1 DE 2841315A1
Authority
DE
Germany
Prior art keywords
safety device
front hood
vehicle
devices
energy
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
Application number
DE19782841315
Other languages
German (de)
Inventor
Andreas Bauer
Ulrich Dr Ing Seiffert
Ruediger Dr Ing Weissner
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE19782841315 priority Critical patent/DE2841315A1/en
Publication of DE2841315A1 publication Critical patent/DE2841315A1/en
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R21/38Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R2021/343Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Superstructure Of Vehicle (AREA)

Abstract

A pedestrian protection system is applied to the front of a car. An impact sensor (8) raises the rear edge of the bonnet (3) on elastic supports to break the force of the impact of the pedestrian onto the bonnet, as well as providing a retarding effect with the steeply sloped bonnet. The rear edge is linked to a drive rod (14) attached to a piston (16) which is displaced by a pyrolytic charge (6) fired by the impact sensor. The piston has an elastic construction and provides a retarding effect when the bonnet is pressed down.

Description

Sicherheitseinrichtung zum Schutz von Fuß- Safety device to protect foot

gängern Die erfindung bezieht sich auf eine im Bereich der Fronthaube eines Fahrzeugs, insbesondere eines Kraftfahrzeugs angeordnete Sicherheitseinrichtung zum Schutz von mit dem Fahrzeug zusammenprallenden Fußgängern, die durch eine im Frontbereich des Fahrzeugs angeordnete Sensorvorrichtung zur Erfassung einer Kollision mit einem Fußgänger auslösbar ist und durch Vorrichtungen zur Verßtellung der Fronthaube aus einer Ruheposition in eine demgegenüber angehobene Aufprallposition gebildet ist, nach Patent zur ... (Patentanmeldung P 28 14 107.3). popular The invention relates to one in the area of the front hood a vehicle, in particular a motor vehicle arranged safety device for the protection of pedestrians colliding with the vehicle, caused by an im Sensor device arranged in the front area of the vehicle for detecting a collision can be triggered with a pedestrian and by devices for adjusting the front hood formed from a rest position in a contrast raised impact position is, according to patent for ... (patent application P 28 14 107.3).

Um die für den Kopf und den Oberkörper eines von einem Fahrzeug angefa.hrenen Fußgängers bestehenden Verletzungegefahren beim Aufschlag auf die Fronthaube des Fahrzeugs wesentlich zu verringern, werden von dem Hauptpatent Vorrithtungen zur Verstellung der Fronthaube aus einer Ruheposition in eine dengegenüber angehobene Aufprallposition vorgeschlagen. Auf dieser Weise wird erreicht, daß die Fronthaube bei einer von der Sensorvorrichtung erfaßten Kollision mit einem Fußgänger in eine gegenüber ihrer Normal- oder Ruhestellung angehobene Aufprall stellung verstellt wird, so daß ein beim Brust- oder Kopfaufprall des Fußgängers im Sinne eines günstigeren Energieabbaus zur Wirkung kommender Deformationsweg der Fahrzeugkarosserie geschaffen wird, der für verringerte Kopf-und Brustverzögerungen und damit für geringere Verletzungsrisiken sorgt. Gleichzeitig wird durch das Anheben der Fronthaube, insbesondere in ihrem hinteren Bereich, ein Aufschlag des Fußgängerkopfes auf den besonders gefährlichen Bereich des Windlaufs, des unteren Frontscheibenrahmens und die Scheibenwischerfüße,bzr.-Halterungen vermieden.For the head and upper body of someone hit by a vehicle There is a risk of injury to pedestrians if they hit the front hood of the To reduce the vehicle significantly, the main patent provides provisions for Adjustment of the front hood from a rest position to a raised position Suggested impact position. In this way it is achieved that the Front hood in the event of a collision with a pedestrian detected by the sensor device adjusted in relation to their normal or rest position raised impact position is, so that a chest or head impact of the pedestrian in the sense of a more favorable Energy dissipation to the effect of the coming deformation path of the vehicle body created that for reduced head and chest retardation and thus for lower risk of injury cares. At the same time, by lifting the front hood, especially in yours rear area, an impact of the pedestrian's head on the particularly dangerous one Area of the cowl, the lower windscreen frame and the wiper feet, or mounts avoided.

In dem Hauptpatent werden als ausführungsformen für die Vorrichtungen zum Anheben der Fronthaube Gassack-Vorrichtungen vorgeschlagen, die im Ruhezustand zusammengefaltet unterhalb der Fronthaube gehalten sind und, durch Signale der Sensorvorrichtung ausgelöst, mit einem Treibmittel auiblasbar sind. Diese Gas sack-Vorrichtungez sollen sich zweckmäßigerweise über die gesamte Fahrzeugbreite erstrekken.In the main patent as embodiments for the devices proposed for lifting the front hood gas bag devices that in the idle state Are kept folded up below the front hood and, by signals from the sensor device triggered, can be inflated with a propellant. These gas sack devices are supposed to expediently extend over the entire width of the vehicle.

Da bei der Verwendung solcher Gassack-Vorrichtungen die Notwendigkeit besteht, diese zwecks Übertragung der bei einer Kollision auftretenden Aufprallkräfte auf den Fahrzeugrahmen großflächig abzustützen, ist die der vorliegenden Erfindung zugrundeliegende Aufgabe darin zu sehen, eine Meiterbildung der Erfindung gemäß dem Hauptpatent vorzuschlagen, die eine einfachere Ubertragung der Aufprallkräfte gestattet. Zur Lösung dieser Aufgabe wird vorgeschlagen, daß die Vorrichtungen zum Anheben der Fronthaube durch Eubkolben-Zylinder-Einheiten gebildet sind, die durch von der Sensorvorrichtung freisetzbare, energiespeichernde Mittel antreibbar sind. Solche Hubkolben-Zylinder-Einheiten lassen sich verhältnismäßig einfach und auf kleinem Raum an dem Fahrzeugrahmen abstützen, wobei auch an eine Integrierung mit der Haubenverriegelung gedacht werden kann.Since when using such gas bag devices the need exists, this for the purpose of transferring the impact forces occurring in a collision Supporting a large area on the vehicle frame is that of the present invention The underlying task is to see a further development according to the invention the main patent to propose a simpler transmission of the impact forces allowed. To solve this problem, it is proposed that the devices for Raising the front hood by Eubkolben-cylinder units are formed by energy-storing means which can be released by the sensor device can be driven. Such reciprocating piston-cylinder units can be relatively simple and on support a small space on the vehicle frame, with an integration with the hood lock can be thought of.

Wenn gemäß einem weiteren Merkmal der Erfindung den Hubkolben-Zylinder-Einheiten bei der Rückbewegung der Fronthaube eine definierte Energievernichtung besorgende Kraftbegrenzungsvorrichtungen zugeordnet sind, dann wird auf diese Weise ein gezielter Energieabbau bei einem Aufprall eines Fußgängerkörpers auf die Fronthaube erreicht, der nicht allein durch den vergrößerten Verformungsweg der Fronthaube, sondern auch durch eine kraftbegrenzte Rückbewegung der Kolben-Zylinder-Einheit gegeben ist. Dabei können die Kraftbegrenzungsvorrichtungen durch den Hubkolben bei der Rückbewegung gegenüber dem Zylinder verklemmende Mittel gebildet sein, die an sich beispielsweise von Vcrspannvorrichtungen von Sicherheitsgurten her bekannt sind (Patentanmeldung P 28 11 694.1).If, according to a further feature of the invention, the reciprocating piston-cylinder units when moving the front hood back a defined Energy destruction Worrying force limiting devices are assigned then this way a targeted energy dissipation in the event of a pedestrian impact on the front hood achieved, which is not only due to the increased deformation path of the front hood, but also through a force-limited return movement of the piston-cylinder unit given is. The force limiting devices can thereby be controlled by the reciprocating piston be formed in the return movement with respect to the cylinder jamming means that known per se, for example, from tensioning devices for seat belts are (patent application P 28 11 694.1).

Als energiespeichernde Mittel schlägt die Erfindung weiterhin die Verwendung einer pyrotechnischen Treibladung, eines unter Druck gespeicherten hydraulischen oder pneumatisehen Arbeitsmittels oder aber einer vorgespannten Feder vor.As an energy storage means, the invention also proposes Use of a pyrotechnic propellant charge, a hydraulic one stored under pressure or pneumatic work equipment or a pretensioned spring.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt, das im folgenden näher erläutert wird. Die Zeichnung zeigt in einer schematischen Seitenansicht ein mit einer erfindungsgemä(3en Sicherheitseinrichtung ausgerüstetes Kraftfahrzeug. In der Zeichnung: ist mit 1 das Fahrzeug und mit 2 ein mit dem Fahrzeug kollidierender Fußgänger bezeichnet. 3 stellt eine Fronthaube des Fahrzeugs 1 dar, die um eine an der vorderen Oberkante des Vorderwagens im wesentlichen horizontal liegende .Drehachse 4 schwenkbar ist. Mit 5 ist eine Vorrichtung bezeichnet, die die Fronthaube 3 aus ihrer mit unterbrochenen Linien angedeutete Ruhestellung in eine mit ausgezogenen Linien dargestellte Auffangstellung verstellt. Diese Vorrichtung 5 besteht im wesentlichen aus einem an dem Rahmen des Fahrzeugs gehaltenen Zylinder 12 und einem darin verschieblich gehaltenen Kolben 13, der über eine schwenkbar gehaltene Kolbenstange 14 mit der Fronthaube 3 verbunden ist. Die Verstellung des Kolbens 13 innerhalb des Zylinders 12 wird durch eine Treibgasladung 6 bewirkt, deren Zünder 11 über eine Signalleitung 9 von einem Sensor 7 gezündet werden kann.In the drawing, an embodiment of the invention is shown, which is explained in more detail below. The drawing shows in a schematic Side view of an equipped with a third safety device according to the invention Motor vehicle. In the drawing: 1 is the vehicle and 2 is the vehicle colliding pedestrians. 3 shows a front hood of the vehicle 1, the one at the front upper edge of the front end of the vehicle is essentially horizontal lying. Rotation axis 4 is pivotable. With 5 a device is referred to, which the front hood 3 from its rest position indicated by broken lines in adjusted a catchment position shown with solid lines. This device 5 consists essentially of a cylinder held on the frame of the vehicle 12 and a piston 13 which is held displaceably therein and which can be pivoted via a held piston rod 14 is connected to the front hood 3. The adjustment of the Piston 13 within cylinder 12 is caused by a propellant gas charge 6, whose igniter 11 can be ignited by a sensor 7 via a signal line 9.

Der Sensor 7 ist zweckmäßigerweise, wie dies in der Zeichnung angedeutet ist, im Bereich der vorderen Stoßstange 10 des Fahrzeugs 1 angeordnet und weist eine oder mehrere Fühlerleisten 8 auf, die eine Kollision mit dem Fußgänger 2 erfassen.The sensor 7 is expediently as indicated in the drawing is arranged in the area of the front bumper 10 of the vehicle 1 and has one or more sensor strips 8, the one Collision with the Capture pedestrian 2.

Mit 15 ist noch eine Kraftbegrenzungsvorrichtung angedeutet, die aus in einer Umfangsnut des Kolbens 13 angeordneten Klemmkörpern, z. B. Kugeln, besteht, die bei einer durch den Aufschlag des Fußgängers 2 auf die angehobene Fronthaube 3 bewirkten Rückbewegung des Kolbens 13 an einer konisch verlaufenden Auflauframpe 16 des Kolbens auflaufen und eine Klemmung des Kolbens 13 in dem Zylinder 12 bewirken. Durch entsprechende Bemessung dieser Auflauframpe sowie der miteinander zusammenwirkenden Materialien kann eine gezielte Kraftbegrenzung erreicht werden, die neben der durch die Anhebung der Fronthaube bewirkten Vergrößerung des Verformungsweges der Fronthaube für einen gezielten Abbau der bei einem Fußgängeraufprall wirksam werdenden Energien sorgt.With 15 a force limiting device is indicated, which from arranged in a circumferential groove of the piston 13 clamping bodies, for. B. balls, consists the one by the impact of the pedestrian 2 on the raised front hood 3 caused return movement of the piston 13 on a conical run-up ramp 16 of the piston run up and cause the piston 13 to jam in the cylinder 12. By appropriately dimensioning this ramp as well as those that interact with one another Materials, a targeted force limit can be achieved, in addition to through the raising of the front hood increased the deformation path of the front hood for a targeted reduction of the energies that become effective in the event of a pedestrian impact cares.

Abweichend von der in der Zeichnung gezeigten Ausführung kann anstelle der pyrotechnischen Treibladung 6 auch ein unter Druck gespeichertes hydraulisches oder pneumatisches Arbeitsmittel zur Verstellung des Kolbens 13 herangezogen werden, das durch eine von den Sensor 7 betätigte Ventilvorrichtung bei einer Kollision mit einem Fußgänger freigegeben wird. Die Verstellung der Fronthaube könnte jedoch auch mittels einer auf den Kolben 13 einwirkenden, vorgespannten Feder, also auf rein mechanischem Wege, erreicht werden.Notwithstanding the version shown in the drawing, instead of of the pyrotechnic propellant charge 6 also a hydraulic one stored under pressure or pneumatic equipment can be used to adjust the piston 13, by a valve device actuated by the sensor 7 in the event of a collision is released with a pedestrian. The adjustment of the front hood could, however also by means of a pretensioned spring acting on the piston 13, that is to say on purely mechanical way.

Die in der Zeichnung gezeigte Hubkolben-Zylinder-Einheit kann dabei zweckmäßigerweise an den beiden Ecken der Hinterkante der Fronthaube 3 angeordnet sein, wobei der Zylinder 12 in einfacher Weise an dem Fahrzeugaufbau befestigt werden kann. Selbstverständlich ist es auch möglich, daß die Fronthaube im wesentlichen parallel angehoben wird9 wobei an allen vier Ecken der Fronthaube Hebevorrichtungen 5 vorgesehen werden müßten.The reciprocating piston-cylinder unit shown in the drawing can thereby expediently arranged at the two corners of the rear edge of the front hood 3 be, wherein the cylinder 12 can be easily attached to the vehicle body can. Of course, it is also possible that the front hood essentially is lifted in parallel9 with lifting devices at all four corners of the front hood 5 should be provided.

Claims (6)

ANSPRÜCHE 1. Bereich der Pronthaube eines Fahrzeugs, insbesondere eines Kraftfahrzeugs, angeordnete Sicherheitseinrichtung zum Schutz von mit dem Fahrzeug zusammenprallenden Pußgängern, die durch eine im Frontbereich des Fahrzeugs angeordnete Sensorvorrichtung zur Erfassung einer Kollision mit einem Fußgänger auslösbar ist und durch Vorrichtungen zur Verstel lung der Fronthaube aus einer Ruheposition in eine demgegenw über angehobene Aufprallposition gebildet ist, nach Patent Nr ... (Patentanmeldung P 28 14 107.3), dadurch gskennzeicli net, daß die Vorrichtungen zum Anheben der Fronthaube durch Hubkolben-Zylinder-Einheiten (5) gebildet sind, die durch voa der Sensorvorrichtung (7) freisetzbare energiespeichernde Mittel (6) antreibbar sind. CLAIMS 1. Area of the front hood of a vehicle, in particular a motor vehicle, arranged safety device to protect with the Vehicle clashing pedestrians, caused by a in the front area of the vehicle arranged sensor device for detecting a collision with a pedestrian can be triggered and through devices for adjusting the front hood from one Rest position is formed in a contrast raised impact position after Patent No ... (patent application P 28 14 107.3), characterized in that the gskennzeicli net Devices for lifting the front hood by means of reciprocating piston-cylinder units (5) are formed, which by voa the sensor device (7) releasable energy-storing Means (6) can be driven. 2. Sicherheitseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß den Hubkolben-Zylinder-Einheiten (5) bei der Rückbewegung der Fronthaube (3) eine definierte Energievernichtung besorgende Kraftbegrenzungsvorrichtungen (15) zugeordnet sind.2. Safety device according to claim 1, characterized in that that the reciprocating piston-cylinder units (5) when the front hood (3) moves back Force limiting devices (15) providing a defined energy dissipation assigned. 3. Sicherheitseinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Kraftbegrenzungsvorrichtungen durch den Hubkolben (13) bei der Rückbewegung gegenüber dem Zylinder ( 12) verklemmende Mittel (15) gebildet sind.3. Safety device according to claim 2, characterized in that that the force limiting devices by the reciprocating piston (13) during the return movement with respect to the cylinder (12) jamming means (15) are formed. 4. Sicherheitseinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als energiespeichcrndes Mittel eine pyrotechnische Treibladung (6) vorgesehen ist.4. Safety device according to one of claims 1 to 3, characterized characterized in that a pyrotechnic propellant charge is used as the energy storage agent (6) is provided. 5. Sicherheitseinrichtung nach einem der Ansürüche 1 bis 3, dadurch gekennzeichnet, daß als energiespeicherndes Mittel ein unter Druck gespeichertes hydraulisches oder pneumatisches Arbeitsmittel vorgesehen ist.5. Safety device according to one of the claims 1 to 3, thereby characterized in that a stored under pressure as the energy storage means hydraulic or pneumatic equipment is provided. 6. Sicherileitsainrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als energiespeicherndes Mittel eine vorgespannte Feder vorgesehen ist.6. Safety device according to one of claims 1 to 3, characterized characterized in that a pretensioned spring is provided as the energy-storing means is.
DE19782841315 1978-09-22 1978-09-22 SAFETY DEVICE FOR PROTECTING PEDESTRIAN Ceased DE2841315A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782841315 DE2841315A1 (en) 1978-09-22 1978-09-22 SAFETY DEVICE FOR PROTECTING PEDESTRIAN

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782841315 DE2841315A1 (en) 1978-09-22 1978-09-22 SAFETY DEVICE FOR PROTECTING PEDESTRIAN

Publications (1)

Publication Number Publication Date
DE2841315A1 true DE2841315A1 (en) 1980-04-10

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DE19782841315 Ceased DE2841315A1 (en) 1978-09-22 1978-09-22 SAFETY DEVICE FOR PROTECTING PEDESTRIAN

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DE (1) DE2841315A1 (en)

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DE102005031024A1 (en) * 2005-07-02 2007-01-04 Daimlerchrysler Ag Protective device for protecting people in a front impact with a motor vehicle has a housing fixed on bodywork and a lifting element in it with linear movement and linked to an engine bonnet hinge
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US6364402B1 (en) 1999-07-19 2002-04-02 Honda Giken Kogyo Kabushiki Kaisha Vehicular hood apparatus
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