DE10066268B4 - Safety system for a motor vehicle - Google Patents

Safety system for a motor vehicle Download PDF

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Publication number
DE10066268B4
DE10066268B4 DE10066268A DE10066268A DE10066268B4 DE 10066268 B4 DE10066268 B4 DE 10066268B4 DE 10066268 A DE10066268 A DE 10066268A DE 10066268 A DE10066268 A DE 10066268A DE 10066268 B4 DE10066268 B4 DE 10066268B4
Authority
DE
Germany
Prior art keywords
hood
hinge
vehicle
safety
locking
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
DE10066268A
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German (de)
Inventor
Ralf Kaiser
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 DE2000114832 priority Critical patent/DE10014832B4/en
Application granted granted Critical
Publication of DE10066268B4 publication Critical patent/DE10066268B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B60R21/36Protecting non-occupants of a vehicle, e.g. pedestrians using airbags
    • 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

Abstract

security system for a Motor vehicle with a hinge device in an accident situation - a Collision of the vehicle with a pedestrian - the front hood (6) of the motor vehicle shifted from its closed starting position to a raised position, wherein the hinge means is an energy storage device (19), a locking device (17) and one with the front hood connected and connected to the vehicle body hinge part (15, 13), and the locking device (17) has an intermediate part (16) with the hinge part (15) connected to the front hood (6), which is under the effect of the energy-storing device, solvable locked, characterized in that with the intermediate part (16) at least one articulated arm (11, 12) of the hinge (10) hingedly connected which is at the other end with the body-fixed part (13) of the hinge device (10) is in articulated connection.

Description

  • The The invention relates to a safety system for a motor vehicle after The preamble of claim 1 or claim 2.
  • There have already been proposed various embodiments of safety devices which are intended to reduce the high risk of injury to pedestrians who are frontally gripped by motor vehicles. Facilities which bring in a collision of the vehicle with a pedestrian, the front hood from its closed starting position in a raised position, have the purpose of increasing the distance of the front hood to the rigid substructure of the vehicle, in particular to the engine, so that the front cover a certain , the energy of an impact is partially destructive deformation path available. The raising or pivoting of the front hood is usually such that the vehicle front side arranged locking device with which the front hood is fixed in its closed position on the vehicle body, forms the pivot point or the axis of rotation for the lifting or pivoting movement of the front hood. Such a device is for example from the DE-A-197 12 961 known, in which case it is proposed to arrange the existing hinges of the bonnet so that they are raised in an accident situation by raising the bonnet. In another from the DE-A-197 10 417 known safety device of this type is proposed to provide an energy-storing device, which may be, for example, a mechanical spring, on the one hand in the normal operation of the vehicle supports the opening of the front hood and on the other hand causes the lifting of the front cover in the event of a collision of the vehicle with a pedestrian. In both known devices, a sensor device arranged in the region of the front bumper of the motor vehicle causes the release of a lock via an electronic control device. Next is from the EP 0 967 128 A2 a hinge arrangement on a front hood of a motor vehicle, in which a front hood in a ground state can be pivoted about fron hood-side hinge pins in the usual way. The hinge pins are held in this basic position in a spring-loaded locking latch. In the case of the requirement of raising this hinge-side, rear hood edge portion, a body-mounted cylinder-piston unit is activated, which raises the front hood, to release this increase the hinge pin is disengaged from the locking latch, by the latter against the spring force acting through the Lifting the hinge pin is overprinted.
  • Other known safety devices comprise an airbag device which, in the event of a collision of the motor vehicle, provides airbags filled with a pedestrian as impact-damping elements. For example, from the DE-A-197 45 873 an airbag device for a motor vehicle is known, which is housed in the frame parts of the windshield and at least one airbag, which is to cover at least a majority of the disc, preferably the entire disc, filled. A similar arrangement of an airbag device is from the DE-A-198 03 165 known.
  • The from the DE-A-27 11 338 known device for damping the impact of a pedestrian provides a one-piece or multi-part, sensitive to an impact sensor airbag, which lays in the filled state over the area of the cowl, thus in the space between the windshield side front windscreen edge and the windscreen or this Room fills. The airbag should raise the bonnet at its rear edge while it is being filled with air or another gas. This is to ensure that the front hood itself is supported by the airbag yielding. It seems doubtful that an airbag device whose airbag is intended to emerge from the front hood area can be forcefully designed so that the airbag can apply the force required to lift it before it can come out of the front hood in time for the impact of a person.
  • newer Developments target the risk of injury and severity potential Injuries to pedestrians who be involved in a frontal collision with a motor vehicle, continue to reduce. The known safety devices are in this regard still in need of improvement.
  • From the JP 1120741 A a generic safety system for a vehicle with a hinge device is known. The hinge device has an energy-storing device, a locking device as well as a hinge part connected to the front hood and a hinge part connected to the vehicle body. The hinge device also has an intermediate part, which is displaceably guided via a bolt in a slot in the front hood side hinge part.
  • The The object of the invention is a respect to the known security system to provide improved security system.
  • These Task is solved with the features of claim 1 or the independent claim Second
  • A According to the invention executed hinge device can therefore be designed structurally simple and reliable, In particular, only a few components of the hinge device need involved in the automatic lifting of the bonnet in the event of an accident to be.
  • In this relationship is according to the characterizing Part of claim 1 with the intermediate part at least one articulated arm the hinged joint, which at the other end with the body-fixed Part of the hinge device is in articulated connection. Of the or the articulated arms and the intermediate part can therefore to those parts belong, the one with an automatic actuation not raised.
  • Further is according to the characterizing Part of the independent claim 2, the intermediate part such solvable locked with the bonnet side hinge part raised in the raised Position of the front cover the intermediate part of the front hinge part solved is.
  • The Locking device of the hinge device can be simple and functionally reliable manner be carried out so that the intermediate part with the hinge part connected to the front hood by at least a movably mounted on one of these parts latch on the second of these parts can be latched, is releasably connected.
  • The Solve the Locking device may be in various ways, for example on mechanical, pyrotechnic, electromagnetic, hydraulic or pneumatic way.
  • Finally, concerns the invention also a motor vehicle, which with a security system according to at least one of the claims accomplished is.
  • Further Features, advantages and details of the invention will be apparent from the drawing, in schematic or simplified representations some embodiments contains described in more detail. Show
  • 1 an oblique view of the front portion of a motor vehicle with a windshield unfolded airbag,
  • 1a a possible arrangement of an airbag device in the area of the front hood,
  • 1b a detailed view of an embodiment of a hinge according to the invention for the front hood in its unlocked position,
  • 2 and 3 on the basis of oblique views of the front portion of a motor vehicle further embodiments of the invention with airbag devices whose airbags impact cushioning cushion for the front cover and form
  • 4 an oblique view of an embodiment variant of a front hood according to the invention, where also an airbag device with airbags are provided as elastically resilient gas cushion.
  • In all embodiments, it is provided that a collision of the motor vehicle with a pedestrian via sensors on the front of the motor vehicle is detected, corresponding signals are transmitted to an electronic device and in good time before the impact of the pedestrian on the vehicle at least one impact absorbing and / or energy absorbing device is activated. A collision with a pedestrian can, like it 1 shows, for example, by at least one on the bumper 7 attached sensor 20 be recorded. The sensor device and the electronic device are not the subject of the present invention and can be carried out in a known manner.
  • 1 shows the front portion of a motor vehicle with a windscreen 1, a vehicle roof 3 , a front hood 6 a front bumper 7 and fenders 8th , The windscreen 1 is from an airbag 5 framed, which is shown immediately after its filling and thus in an unfolded position. The below the airbag 5 located vehicle contours are shown by dashed lines and can be seen that the unfolded airbag 5 relatively large volume surrounds the entire windscreen frame, which laterally from the two A-pillars, not shown, the front portion of the vehicle roof 3 and at the bottom of the so-called (also not visible) cowl is formed. The inflated in a corresponding accident situation and completely filled airbag 5 also lays down over the windscreen 1 facing edge of the front hood 6 which in an accident situation is brought by the electronic device before filling the airbag and before the impact of the person concerned in a relation to their closed position slightly raised position. Lifting the front hood 6 takes place at least on their rear side facing away from the direction of travel, so on the one hand a certain distance of the front hood 6 is achieved to the rigid substructure of the vehicle, which is the deformation path of the hood 6 increased, and on the other hand unhindered and rapid deployment of the airbag 5 is supported.
  • As 1a shows is from the folded or rolled airbag 5 and an inflator existing airbag device 9 on the vehicle in the area below the rear edge of the front disc 1 on the wind plate 21 in the area of the water box 22 accommodated. The gas generator can be fastened, for example, in the region of the bulkhead wall. In principle, accommodation of the airbag device is also possible at another location, for example at the underside of the front hood 6 ,
  • The illustrated embodiment, in which the windscreen 1 from a single and thus one-piece running airbag 5 is framed, is a preferred embodiment. However, it is also possible to provide two in particular equal sized airbags, which also form a complete, in particular frame-like, impact protection in an accident situation, their separation from each other preferably centrally from top to bottom in front of the windshield 2 runs.
  • In the illustrated embodiment is a front hood 6 provided in the area of the windscreen 1 is articulated. This is a widely used design that allows easy access to the engine compartment from the front of the vehicle. The front hood 6 is here by means of laterally mounted hinges 10 brought into the open position. A if necessary, in a corresponding accident situation, automatically releasable locking device, which at the in 1b illustrated embodiment according to the invention in the hinge 10 integrated, causes an immediate lifting of the front hood 6 , wherein the front hood closure acts as a rotation axis. 1b shows the basic structure of a variant of the invention combined with the locking device hinge 10 , The hinge 10 is as a four-bar linkage with a front and a rear articulated arm 11 . 12 executed. The one end of the articulated arms 11 . 12 is in each case with a vertical part of a base plate 13 at the inner edge area of the front hood 6 fastened opening to be closed, for example screwed, is articulated. The second ends of the articulated arms 11 . 12 stand with vertically extending parts of an intermediate part 16 in articulated connection. The intermediate part 16 is normally on the locking device with a mounting strap 15 in solid connection, which in turn at the bottom of the front hood 6 is attached. The front articulated arm 11 is comparatively long and straight, the rear articulated arm 12 is L-shaped, so the front hood 6 can be brought into their normal open position. The locking device consists of locking bolts 17 which cooperate with a triggering device, which is not shown. In the normal position, the initial position, which is not shown here, engage the locking bolt 17 in holes 18 in down-turned parts 15a the fastening strap 15 are formed. For this purpose, enforce the bent down parts 15a the fastening strap 15 one opening each 16a in the middle part 16 , The fastening strap 15 and thus also the front hood 6 are from below by a spring, here a helical compression spring 19 , applied to the base plate 13 of the hinge 10 is supported and a leadership part 15b , which is at the bottom of the fastening strap 15 is hinged and another opening in the intermediate part 16 interspersed, surrounds. The helical compression spring 19 is with locked locking bolt 17 compressed and thus under bias. Instead of a helical compression spring can of course also another energy-storing device, such as a gas spring, are provided.
  • A hinge constructed in accordance with the invention may be an articulated hinge or, as shown, a multi-link hinge. The locking device can also be designed so that the movable latch on the part 15 and the catch on the part 16 is provided.
  • About the aforementioned triggering device, which occurs in an accident situation in action, a retraction of the locking bolt 17 causes, whereby the connection of the intermediate part 16 with the fastening strap 15 is solved and lifting or raising the front cover 6 under the pressure of the spring 19 he follows. The two articulated arms 11 . 12 and the intermediate part 16 remain in their initial position. Retracting the locking bolts 17 and thus the release of the lock can be done via a device, not shown, for example, pyrotechnic, mechanical, electromagnetic, hydraulic or pneumatic manner.
  • A second embodiment of the airbag arrangement is in 2 shown. In addition to that already on the basis of 1 described, the windscreen 1 In an accident situation framing, an impact protection forming airbag 5 Here are two more airbags 25 provided, with the front hood 6 each between the front hood 6 and fill the vehicle body laterally resulting gap and here the front hood 6 padding, the windscreen-side corner areas of the front hood 6 revolve and thus an additional damping support of the front hood 6 cause. The triggered airbags 25 also cushion the corresponding areas from the outside, so that the risk of injury to a pedestrian in the event of a collision is markedly reduced here. A possible course or a possible expansion of the airbags 25 below the front hood 6 is in 2 drawn with dotted lines. It can also be any of these airbags 25 also the respective edges of the front hood 6 cover. The airbags 25 can also be designed so that they in the lateral direction of the fenders 8th largely cover the vehicle.
  • A basic possibility of accommodating a corresponding airbag device shows schematically 2a , The one folded airbag 25 and a gas generator 29 comprehensive airbag device can below the front hood 6 on an inside heel 8a of the fender 8th to be ordered.
  • Also in this embodiment, a triggering of the airbags takes place 25 immediately after automatic installation of the bonnet 6 , The operation of this embodiment can therefore with that according to 1 to match. In order to reduce the risk of injury to the person concerned, it is advantageous to use the airbags 25 with a the windscreen 1 framing airbag 5 to combine. However, this can also be omitted. In this case, it is recommended the two airbags 25 so that they fill the space between front hood 6 and windscreen 1 completely cover and fill.
  • In the 3 illustrated embodiment shows a triggered airbag 25 which the windscreen 1 partially framed and at the same time the lateral gaps between the vehicle body and the raised front hood 6 fills and upholster these areas. The deployed in the illustrated embodiment in the form of an H airbag 35 is preferably carried out so that it with its lateral arms, the windscreen 1 in the area of A-pillars 2 , the fender areas and extending in the vehicle longitudinal edge areas of the front hood 6 covers and with a middle section the space between the windscreen-side edge of the front hood 6 and the disc 1 covers and fills. Except for the area of the roof 3 thus becomes the windscreen 1 Framed in a U-shape. The dotted line in 3 shows the course of the edges of the erected front hood 6 ,
  • 4 shows a variant in which the front hood 26 from two parts 26a . 26b consists of an upper, visible from the outside part 26a and an underlying substantially conforming and here also flat executed part 26b , The two made of sheet metal or plastic front hood parts 26a . 26b are laterally over joints or hinges, the articulated arms 27a . 27b may have, connected to each other such that the upper front hood part 26a opposite the lower front hood part 26b can be raised or raised. Normally the parts form 26a . 26b a unit that can be swung up to open the engine compartment. Between the two front hood parts 26a . 26b is at least an airbag 45 Here it is a number of airbags 45 , in the illustrated embodiment, there are three, housed, which can deploy in the transverse direction of the vehicle. These airbags 45 are in 4 shown in their triggered position. The airbags 45 extend at least substantially over the entire width of the front hood 26 , Alternatively, it is also possible to provide airbags which run in the filled state in the longitudinal direction of the front hood. The folded airbags 45 can from a single gas generator 39 or be filled by a plurality of gas generators with air or other gas, wherein also the gas generator 39 between the two front hood parts 26a . 26b can be accommodated. The gas generator 39 but can also be elsewhere, outside the two front hood parts 26a . 26b , for example, laterally in the engine compartment, are housed.
  • In the illustrated embodiment, it is provided that the airbags 45 even while filling with air or another gas the upper front hood part 26a lift or raise. However, it can also be provided, separate automatically operable positioning devices for the relative movement of the upper front hood part 26a to use. The design of the airbags 45 is especially made to have different volumes, each airbag 45 about hose-shaped unfolded and the furthest front airbag 45 the least, the farthest from the front airbag 45 has the largest volume. This can be a desired pivotal movement of the upper front hood part 26a opposite the lower front hood part 26b through the airbags 45 get supported. In any case, it is beneficial to make sure that all airbags 45 with raised or raised upper front hood part 26 with both front hood parts 26a . 26b forming upholstery in contact. This embodiment thus has the particular advantage that not only additional deformation path for the front hood 26 is provided, but also gas cushion for energy absorption. Both effects significantly reduce the risk of injury.
  • In this embodiment, it is also not necessary that the lower hood part 26b is completely flat. It is only necessary to ensure that but the airbag (s) can support when filling accordingly or can.

Claims (7)

  1. Safety system for a motor vehicle with a hinge device, which in an accident situation - a collision of the vehicle with a pedestrian - the front hood ( 6 ) of the motor vehicle is displaced from its closed starting position into a raised position, wherein the hinge device is an energy-storing device ( 19 ), an Ver locking device ( 17 ) and a hinge part connected to the front hood and connected to the vehicle body ( 15 . 13 ), and the locking device ( 17 ) an intermediate part ( 16 ) with the with the front hood ( 6 ) hinged part ( 15 ), which is under the action of the energy-storing device, releasably locked, characterized in that with the intermediate part ( 16 ) at least one articulated arm ( 11 . 12 ) of the hinge ( 10 ), which at the other end is connected to the body-mounted part ( 13 ) of the hinge device ( 10 ) is in articulated connection.
  2. Safety system for a motor vehicle with a hinge device, which in an accident situation - a collision of the vehicle with a pedestrian - the front hood ( 6 ) of the motor vehicle is displaced from its closed starting position into a raised position, wherein the hinge device is an energy-storing device ( 19 ), a locking device ( 17 ) and a hinge part connected to the front hood and connected to the vehicle body ( 15 . 13 ), characterized in that the locking device ( 17 ) an intermediate part ( 16 ) with the with the front hood ( 6 ) hinged part ( 15 ), which is under the action of the energy-storing device, releasably locked such that in the raised position of the front hood ( 6 ) the intermediate part ( 16 ) of the hinge part connected to the front hood ( 15 ) is solved.
  3. Safety system according to claim 1 or 2, characterized in that the intermediate part ( 16 ) with the with the front hood ( 6 ) hinged part ( 15 ) by at least one of these parts ( 13 . 16 ) movably mounted bars ( 17 ) attached to the second of these parts ( 13 . 16 ) is latched, is releasably connected.
  4. Safety system according to one of claims 1 to 3, characterized in that the locking device mechanical, pyrotechnic, electromagnetic, hydraulic or pneumatic way detachable is.
  5. Safety system according to one of claims 1 to 4, characterized in that the energy-storing device at least one spring, for example a helical compression spring, is.
  6. Safety system according to one of claims 1 to 5, characterized in that it comprises a arranged in the front region of the vehicle sensor device for detecting an accident situation and at least one of the signals processing electronic device, the means for automatically lifting the front hood ( 6 ) controls.
  7. Motor vehicle with a safety system according to at least one of the preceding claims.
DE10066268A 2000-03-24 2000-03-24 Safety system for a motor vehicle Expired - Fee Related DE10066268B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2000114832 DE10014832B4 (en) 2000-03-24 2000-03-24 Safety system for a motor vehicle

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DE10066268B4 true DE10066268B4 (en) 2008-02-28

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DE2000114832 Expired - Fee Related DE10014832B4 (en) 2000-03-24 2000-03-24 Safety system for a motor vehicle

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