DE19964304B4 - Hood assembly - Google Patents

Hood assembly Download PDF

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Publication number
DE19964304B4
DE19964304B4 DE19964304A DE19964304A DE19964304B4 DE 19964304 B4 DE19964304 B4 DE 19964304B4 DE 19964304 A DE19964304 A DE 19964304A DE 19964304 A DE19964304 A DE 19964304A DE 19964304 B4 DE19964304 B4 DE 19964304B4
Authority
DE
Germany
Prior art keywords
hood
arrangement
energy storage
storage unit
vehicle
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.)
Expired - Fee Related
Application number
DE19964304A
Other languages
German (de)
Inventor
Andreas Polz
Peter Schlegel
Jörg SCHNEPPENHEIM
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.)
Edscha Engineering GmbH
Original Assignee
Edscha 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 Edscha AG filed Critical Edscha AG
Priority to DE1999122454 priority Critical patent/DE19922454A1/en
Application granted granted Critical
Publication of DE19964304B4 publication Critical patent/DE19964304B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00Additional features or accessories of hinges
    • 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
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/50Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53Application of doors, windows, wings or fittings thereof for vehicles characterised by the type of wing
    • E05Y2900/536Hoods

Abstract

Hood assembly, in which a front hood (1) of a vehicle on the frame of the vehicle is arranged to cover the engine compartment, wherein the front hood (1) toward a raised position by an energy storage unit (13) relocatable and without operation the energy storage unit (13) held in a lowered position is characterized in that the Front hood (1) and the frame each associated with at least one wedge surface one of which is so relative to the other through the energy storage unit (13) is displaceable in order to pivot the front hood (1) upwards.

Description

  • The The invention relates to a bonnet arrangement according to the preamble of claim 1.
  • Out In the meantime, numerous safety devices such as Airbag and the like for Inmates of passenger cars known. By contrast, protective measures for pedestrians who be detected by the bug of a passenger car, so far hardly suggested or practically implemented. To prove particularly problematic accidents with pedestrians who at speeds up to 60 km / h, as the pedestrian, when he grasped head-on is often with his head on the hood of the car impacts and dies of this injury. The severity of the injury arises in that the mostly thin Although plate-trained front or bonnet would tend to bend it, but at a premium on under the hood arranged, not or hardly deformable parts such as the engine block, the strut box, the air filter, the valve cover or the longitudinal and crossbeams the vehicle is coming. It would be desirable, when the impact, in particular of the head of a pedestrian in its consequences could be mitigated. At speeds over 60 km / h in contrast, the pedestrian, after he grasps was over the vehicle hurled.
  • DE 29 22 893 C2 proposes to support the engine hood and the fender in the area of the joint formed between these two parts with energy-absorbing U-profiles running along the two parts and onto structural parts which, in the event of a collision, convert the impact into deformation energy. A disadvantage of this arrangement, on the one hand, that already considerable forces must act on the profiles in order to bend them. In addition, these otherwise useless U-profiles are costly to purchase and expensive to assemble.
  • DE 27 37 876 A1 describes an impact protection device which displaces a net-like collecting element by means of a prestressed pivoting flap from a rest position, in which the net substantially bears against the front hood, into a catching position, which extends substantially in front of the windshield of the motor vehicle. This device is more of the windshield than the protection of the pedestrian from too hard impact on the front hood. In addition, any contact of the swing motion triggering sensor incorporated in the front bumper may cause the network to be triggered, thereby entering into a variety of constellations in which the network will take away the entire view of the driver.
  • DE 28 41 315 A1 describes a safety device in which, in response to a signal of a sensor arranged in the front region of a vehicle for detecting a collision with a pedestrian, the front hood is displaced from a rest position to a contrast raised crash position by a piston-cylinder unit, wherein the displacement by a Energy storage takes place. When lifting the front hood is pivoted about a arranged on the front side of the vehicle horizontal axis of rotation.
  • DE 197 10 417 A1 describes a device for lifting the front hood, in which a pivoting about a arranged at the front of the vehicle horizontal axis of rotation is triggered by the same gas spring, which also supports the lifting of the hinged at the other end bonnet.
  • DE 197 21 565 A1 describes a safety device on motor vehicles for lifting the front hood, in which the lifting of the front hood is speed-dependent carried out by a mechanism integrated with the hood lock. For this purpose, either the normally triggered for safety reasons from the driver unlocking the acted upon with a compression spring lock by a sensor triggered by an impact, triggered, or alternatively, especially at higher speeds an integrated into the locking pin of the hood lock piston-cylinder unit expanded by a propellant charge. Disadvantage of this arrangement is, first, that the force required to close the bonnet must not exceed a certain threshold to allow the driver to close the bonnet comfortably. Since the incident forces are significant in a personal accident, the front hood is depressed quickly and it comes to the known personal injury, especially in the head area. Also, the provision of a propellant charge for expanding the piston-cylinder unit is problematic because their durability, especially with little protected arrangement, limited and the exchange is problematic. There is also the risk that compression spring and the piston-cylinder unit are triggered simultaneously, whereby the opening of the front hood would be so large that the wind brings the hood against the windshield in Appendix and the driver blocks the view.
  • DE 27 11 338 A1 describes a device for damping the impact of a pedestrian, in which an airbag is arranged in the region of the cowl, the filling of which is triggered by a sensor signal.
  • there the airbag can be arranged so that it also forms part of the Lifting front hood, whereby he overcomes a spring force, the two over a fulcrum interconnected links, one of which is rotatable on the bonnet and the other rotatable on a fixed part of the Motor vehicle is arranged, biased in an angled position. It is also proposed yielding profile body in strip form in the Arrange type of seal between the hood and side panels to order to provide further protection during impact.
  • DE 27 11 339 A1 describes a front-hinged front hood in which the linkage is designed so resilient that it allows a horizontal displacement of the front hood by the impact of a pedestrian, wherein the rearwardly displaced front hood is connected at the rear side with one end of a rigid locking element, whose other end is displaced in a guide curve upwards and backwards when the front hood is displaced to the rear in such a way that the front hood makes an upward movement. This lifting works only under the condition that it actually comes to a horizontal displacement of the bonnet, which is not always guaranteed for example in the impact of children.
  • EP 0 509 690 A1 describes a front hood, which is articulated on its front side to the vehicle structure such that due to an impact, the front hood is displaced to the rear, wherein the arranged on the rear side closure or pivoting means due to a movement of the front hood to the rear of a pivotal movement of the front hood after triggering above, so that the deformation path of the hood is increased under the impact of a pedestrian. The pivotal movement is performed, for example, by a four-bar hinge, which is otherwise used for pivoting the front hood when access to the engine and other parts to be released. Here, too, a lifting of the front hood occurs only with very strong displacement of the front hood, while a weak impact, the front hood does not shift to the rear and thus not upwards.
  • DE 197 12 961 A1 describes the arrangement of a front hood on a vehicle, in which a hinge is arranged on a hinge support, which hinge support is pivoted in the event of an impacting pedestrian up to raise the front cover. The problem with this arrangement is that the hood lock for the front hood defines a pivot axis that does not allow optional displacement of the hinge carrier, which is why the described hinge carrier blocked, for example.
  • JP 09 315 266 A describes a front hood, which is displaceable via a piston-cylinder unit from a lowered to a raised position, wherein the front hood is connected via a hinge with a pivotally mounted on the body double lever.
  • JP 10 258 774 A describes a bearing for a front hood, in which by a cable a handlebar, at the outer end of the pivot joint is arranged to open the front hood, from a front hood in a lowered position holding position in a position defined by a slot guide position is displaceable in the the handlebar assumes an approximately vertical position and displaces the front cover accordingly upwards.
  • JP 11 115 680 A describes a device for lifting a front hood, in which the front hood is displaceable via a piston-cylinder unit in a raised position, wherein a handlebar on a first, the bonnet facing hinge pivotally pivots the front cover and on the second, this joint facing away from the end is displaceable in a slot-like guide, in which a locking position is provided to lock the handlebar firmly.
  • JP 10 152 074 A describes a bonnet assembly in which the rearward movement of a front hood in the event of a frontal crash is to be at least partially implemented by an intermediate link provided in an upward movement, wherein the intermediate link formed with a corresponding joint in a slot guide of the battered on the body part is.
  • All in all is not a solution yet It has been suggested that a cost effective and after a use easily recoverable arrangement suggests, which constructively so matured is, that you could be used in production vehicles.
  • It the object of the invention is a bonnet arrangement according to the To propose preamble of claim 1, the cost and a technical realizable pedestrian protection supplies.
  • These Task is in the front hood assembly according to the invention with the characterizing features of claim 1 solved.
  • In the front hood arrangement according to the invention is advantageously not the space below the bonnet adjusted, but implemented a substantially in the direction of travel displacement movement in an upward displacement of the bonnet. As a result, more valuable installation space for the system is saved, so that this solution can be easily integrated into the engine compartment. Thus, the bonnet assembly is particularly suitable for bonnets that are not fixed by hinges, but guides on the frame.
  • The Front hood arrangement according to the invention allows to make the bonnet active, that is, in the event of an impact, for example, by a front of the motor vehicle arranged sensor is detected, the front cover in a raised Able to move, with the biasing means, the front hood lift and unlock in the event of impact, at the same time Energy absorbing tensioners are the ones that implement the impact energy in span energy for the clamping means or in deformation energy of the front hood implement. It should be mentioned in particular that the front hood arrangement according to the invention a true pivoting movement around defined in the event of an impact of the hood lock horizontal pivot axis provides, so that the energy-converting clamping means Completely are ready for use. This is a big problem, namely that through uncontrolled swinging out of the front hood though a certain Distance to the hard parts delivered below the front hood will, but afterwards the deformation energy is absorbed exclusively by the bonnet must and the clamping devices do not help to get loose. This is inventively characterized ensured that no over-determination the displacement movement enters the raised position that the way back would block.
  • Conveniently, be the prestressed links or spring elements that lifting cause the front hood, with locking elements in one position held in the front hood after unlocking the hood lock for an inspection accessible from the engine compartment is held. Only in the case of an impact, the locking elements solved, being a plurality of possibilities to release the locking elements comes into consideration.
  • On the one hand can the locking elements when formed in the manner of a latch are about Electromagnetically actuated Switch withdrawn which, in response to a corresponding sensor signal, the above a controller is forwarded within a few milliseconds, report an impact. It is possible, in the controller, one of a speed measuring device speed signal to check if a presettable Minimum speed or a presettable maximum speed as additional Conditions are met to ensure that the bonnet only in such accidents is triggered with pedestrians who in a life-threatening speed band due to impact occur. For example, you can the thresholds as minimum speed 5 or 10 km / h and as a maximum speed For example, 40 or 50 km / h.
  • Alternatively to the electronically controlled release of the bonnet 1 It is also possible to mechanically couple an area in the front part of the motor vehicle with the pawl such that when a minimum stress is exceeded, the pawl is triggered. In this case, come both on pulleys guided cables and hydrauliche amplifying circuits, which also respond to touching the front end of the motor vehicle into consideration.
  • Preferably is the front hood over a hinge, designed, for example, as a single-joint or four-joint hinge, hinged to the frame of the vehicle.
  • Further Advantages and features of the invention will become apparent from the following Description and from the dependent claims.
  • The Invention will be described below with reference to several embodiments with reference to the enclosed drawings closer explained.
  • 1 shows a schematic side view of the front end of a motor vehicle with an embodiment of a front bonnet assembly according to the invention.
  • 2 shows an enlarged section of the bonnet assembly 1 ,
  • In the 1 and 2 shown bonnet assembly comprises a front hood 1 , which is held closed at its front end by a hood lock. The front hood 1 is in 1 shown in a closed position. A hinge allows opening the front hood 1 after unlocking the hood lock, the front hood 1 is displaceable around a hinge of the hinge.
  • The relocation of the front hood 1 in the opening direction P takes place by the mutual displacement of two trained in wedge shape stops A, B under the bias of a spring 13 which attacks can also consist of a plastically deformable plastic foam or the like NEN, whereby further work to convert the impact energy must be expended to the bonnet 1 to relocate to the lowered position again.
  • A trigger mechanism holds the wedges A, B in their rest position against the bias of the spring 13 trained energy storage unit. In the case of an accident with a pedestrian, which is detected for example by a sensor in the front area of the motor vehicle and delivers an appropriate signal to a control unit, the control unit triggers the trigger mechanism by means of an electromagnet from its locking position and thus gives the spring 13 free for a push operation, eliminating the front hood 1 is shifted in the direction of the arrow P in a raised position, which is substantially the dashed position in 2 equivalent.
  • To prevent when parked or due to hooliganism the bonnet 1 is shifted to its raised position, the controller further receives a representative of the speed of the motor vehicle signal, for example, from a speed sensor, which is arranged in the region of the front axle. This makes it possible, in particular, to monitor a preferred range of speeds, for example above preset values, the release of the triggering mechanism being permitted only in this range, for example, of 10 km / h to 60 km / h.
  • After triggering the front hood 1 Regardless of whether intended or unintentional, the hinge can be easily relocated back to its rest position by unlocking the hood lock and the front hood 1 possibly displaced with the aid of a gas spring in its open position, whereby the lever at its joint with the weight force of the front hood 1 is loaded and due to the leverage ratio is able to, the spring 13 to return to their cocked position. It is possible, alternatively or cumulatively, to provide a clamping device for this purpose, which can be mounted, for example.
  • It is possible to additionally provide a gas spring which, upon release of the trigger mechanism 14 the bonnet abruptly shifted upward and thus the spring 13 replaced.
  • In the foregoing, an active front hood has been described which is triggered upon impact of a pedestrian to convert the impact energy into deformation energy before the pedestrian strikes hard parts of the engine compartment. It is understood that the triggering is triggered in a crash in a very short time, preferably less than 100 and better less than 50 milliseconds, with the compliance of this restriction is required to prevent it coming to an impact when the bonnet 1 has not been fully shifted to its raised position.

Claims (12)

  1. Front hood arrangement, in which a front hood ( 1 ) of a vehicle is arranged on the frame of the vehicle for covering the engine compartment, wherein the front hood ( 1 ) in the direction of a raised position by an energy storage unit ( 13 ) displaceable and without actuation of the energy storage unit ( 13 ) is held in a lowered position, characterized in that the front hood ( 1 ) and the frame in each case at least one wedge surface is assigned, one of which relative to the other by the energy storage unit ( 13 ) is displaceable to the front hood ( 1 ) to pivot upwards.
  2. Front hood arrangement according to claim 1, characterized in that a locking element, the energy storage unit ( 13 ) releases when an impact condition is met.
  3. Front hood arrangement according to claim 2, characterized in that that to Detecting a collision condition a sensor in the front of the Vehicle is provided.
  4. Front hood arrangement according to claim 2 or 3, characterized in that the energy storage unit ( 13 ) can only be triggered if a first speed threshold value is exceeded or if it falls below a second speed threshold value which is above the first speed threshold value.
  5. Front hood arrangement according to one of claims 1 to 4, characterized by a gas spring.
  6. Front hood arrangement according to one of claims 1 to 5, characterized in that the energy storage unit ( 13 ) comprises a prestressed spring element.
  7. Front hood arrangement according to one of claims 1 to 6, characterized in that the front hood ( 1 ) has a hood lock with which the front hood ( 1 ) is closable.
  8. Front hood arrangement according to claim 7, characterized in that the hood lock in the direction of a raised position of the front hood ( 1 ) biased means for relocating the front yard be ( 1 ).
  9. Front hood arrangement according to one of claims 1 to 8, characterized in that a hinged hinge is provided to the front hood ( 1 ) in normal operation.
  10. Front hood arrangement according to one of claims 1 to 8, characterized in that a four-bar hinge is provided to the front hood ( 1 ) in normal operation.
  11. Front hood arrangement according to one of claims 1 to 10, characterized in that the wedge surface of a plastically deformable material.
  12. Front hood arrangement according to one of claims 1 to 11, characterized in that the front hood ( 1 ) and the frame are each assigned two wedge surfaces.
DE19964304A 1999-05-17 1999-05-17 Hood assembly Expired - Fee Related DE19964304B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1999122454 DE19922454A1 (en) 1999-05-17 1999-05-17 Front hood assembly for motor vehicle has multijoint hinge with connecting rod which pivot front hood to chassis, such that connecting rod varies in length under collision impact

Publications (1)

Publication Number Publication Date
DE19964304B4 true DE19964304B4 (en) 2005-02-03

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Family Applications (3)

Application Number Title Priority Date Filing Date
DE19964348A Expired - Lifetime DE19964348B4 (en) 1999-05-17 1999-05-17 Hood assembly
DE19964304A Expired - Fee Related DE19964304B4 (en) 1999-05-17 1999-05-17 Hood assembly
DE1999122454 Withdrawn DE19922454A1 (en) 1999-05-17 1999-05-17 Front hood assembly for motor vehicle has multijoint hinge with connecting rod which pivot front hood to chassis, such that connecting rod varies in length under collision impact

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19964348A Expired - Lifetime DE19964348B4 (en) 1999-05-17 1999-05-17 Hood assembly

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE1999122454 Withdrawn DE19922454A1 (en) 1999-05-17 1999-05-17 Front hood assembly for motor vehicle has multijoint hinge with connecting rod which pivot front hood to chassis, such that connecting rod varies in length under collision impact

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DE2711339A1 (en) * 1977-03-16 1978-09-28 Hermann Prof Dr Ing Appel Impact absorbing vehicle bonnet - has hinges and catches mounted on resilient fittings to reduce injury to pedestrians
DE2737876A1 (en) * 1977-08-23 1979-03-08 Volkswagenwerk Ag Retractable injury-reducing shield for vehicle bonnet - consists of sheet which swivels in front of windscreen when activated by impact sensor on bumper
DE2841315A1 (en) * 1978-09-22 1980-04-10 Volkswagenwerk Ag Pedestrian collision protection for car - with impact sensor and servo lift for rear edge of bonnet
DE2922893C2 (en) * 1979-06-06 1989-01-26 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
EP0509690A1 (en) * 1991-04-16 1992-10-21 Jaguar Cars Limited Vehicle bonnets
JPH09315266A (en) * 1996-05-31 1997-12-09 Mitsubishi Motors Corp Hood device for vehicle
DE19721565A1 (en) * 1996-05-31 1997-12-04 Volkswagen Ag Motor vehicle safety device for protecting pedestrians
JPH10152074A (en) * 1996-11-26 1998-06-09 Nissan Motor Co Ltd Pop-up type hood structure
DE19710417A1 (en) * 1997-03-13 1998-09-17 Bayerische Motoren Werke Ag bonnet fitting for vehicle
JPH10258774A (en) * 1997-03-19 1998-09-29 Nissan Motor Co Ltd Flap type hood
DE19712961A1 (en) * 1997-03-27 1998-10-01 Bayerische Motoren Werke Ag Safety mounting for front engine cover
JPH11115680A (en) * 1997-10-16 1999-04-27 Nissan Motor Co Ltd Flip-up type hood

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DE19922454A1 (en) 2000-11-30

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