DE10046056A1 - Belt force limiting process involves permitting a rapid build-up of belt force to preset level and thereafter reducing it - Google Patents

Belt force limiting process involves permitting a rapid build-up of belt force to preset level and thereafter reducing it

Info

Publication number
DE10046056A1
DE10046056A1 DE2000146056 DE10046056A DE10046056A1 DE 10046056 A1 DE10046056 A1 DE 10046056A1 DE 2000146056 DE2000146056 DE 2000146056 DE 10046056 A DE10046056 A DE 10046056A DE 10046056 A1 DE10046056 A1 DE 10046056A1
Authority
DE
Germany
Prior art keywords
force
belt force
belt
level
limiting process
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.)
Withdrawn
Application number
DE2000146056
Other languages
German (de)
Inventor
Martin Wifling
Gerhard Klingauf
Robert Fleischmann
Robert Kopetzky
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.)
Takata Petri Ulm GmbH
Original Assignee
Takata Europe Vehicle Safety Technology GmbH
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 Takata Europe Vehicle Safety Technology GmbH filed Critical Takata Europe Vehicle Safety Technology GmbH
Priority to DE2000146056 priority Critical patent/DE10046056A1/en
Publication of DE10046056A1 publication Critical patent/DE10046056A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • B60R2022/283—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using tearing or scoring of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • B60R2022/286—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material
    • B60R2022/287—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material of torsion rods or tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

The belt force limiting process limits the force acting on a vehicle occupant in the event of an accident. If one occurs, the belt force (14) is permitted to rise to a preset force level corresponding to the maximum permissible force (Fmax). After this, the belt force is reduced to a lower level. A torsion bar can be used to limit the force.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Begrenzung der auf einen Fahrzeuginsassen im Falle eines Unfalls wirkenden Gurtkraft.The present invention relates to a method for limiting the a vehicle occupant acting in the event of an accident belt force.

Derartige Verfahren sind grundsätzlich bekannt und dienen dazu, im Falle Unfalls die auf einen Fahrzeuginsassen wirkende Gurtkraft zu begrenzen, um Verletzungen des Fahrzeuginsassen zu minimieren. Zu diesem Zweck ist es bekannt, Energie dissipierende Elemente, beispielsweise Torsions­ stäbe einzusetzen, die bei einer bestimmten, auftretenden Gurtkraft ver­ formt werden und hierdurch die auf den Fahrzeuginsassen wirkende Gurtkraft begrenzen.Such methods are generally known and are used in the case To limit the belt force acting on a vehicle occupant in an accident, to minimize injuries to the vehicle occupant. To this end it is known to dissipate energy elements, such as torsion use rods that ver at a certain belt force be shaped and thereby the one acting on the vehicle occupants Limit belt force.

Es ist die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Gurt­ kraftbegrenzung zu schaffen, welches das Verletzungsrisiko eines Fahr­ zeuginsassen weiter verringert.It is the object of the present invention to provide a belt method to create force limitation, which increases the risk of injury to a driver witness inmates further reduced.

Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Anspruchs 1 und insbesondere dadurch, daß im Falle eines Unfalls zunächst ein ra­ scher Anstieg der Gurtkraft auf ein vorbestimmtes Kraftniveau zugelassen wird, welches einer zugelassenen Maximalkraft entspricht, welcher der Fahrzeuginsasse ausgesetzt werden sollt. Anschließend wird die Gurtkraft von diesem vorbestimmten Kraftniveau auf eine geringere Gurtkraft abge­ senkt.This object is achieved by the features of claim 1 and in particular that in the event of an accident a ra permitted increase in the belt force to a predetermined force level which corresponds to an approved maximum force, which the Vehicle occupants should be exposed. Then the belt force  abge from this predetermined force level to a lower belt force lowers.

Das erfindungsgemäße Verfahren besitzt den Vorteil, daß der Fahrzeugin­ sasse so früh wie möglich an die Verzögerung des Fahrzeuges angekoppelt wird, indem zunächst ein möglichst steiler Anstieg der Gurtkraft auf das vorbestimmte Kraftniveau zugelassen wird. Hierbei wird dieses Kraftni­ veau so gewählt, daß eine zugelassene Maximalkraft nicht überschritten wird. Anschließend wird die Gurtkraft abgesenkt, so daß dynamische Ei­ genheiten während des Unfalls, z. B. ein Kopfnicken, berücksichtigt wer­ den können. Das erfindungsgemäße Verfahren wird nachfolgend anhand der beigefügten Figur beschrieben.The inventive method has the advantage that the vehicle sit as early as possible on the deceleration of the vehicle is by first increasing the belt force as steeply as possible to the predetermined force level is allowed. Here this force is veau selected so that an approved maximum force is not exceeded becomes. Then the belt force is reduced so that dynamic egg opportunities during the accident, e.g. B. a nod, considering who that can. The method according to the invention is described below the attached figure.

In der Figur ist die auftretende Gurtkraft im Falle eines Unfalls über der Zeitachse dargestellt. Die maximal zugelassene Gurtkraft Fmax ist mit der Linie 16 bezeichnet. Die im Falle eines Unfalls bei herkömmlichen Syste­ men auftretende Gurtkraft ist mit der gestrichelten Linie 10 dargestellt. Im theoretischen Fall, der mit der durchgezogenen Linie 12 bezeichnet ist, steigt die Gurtkraft zunächst auf das vorbestimmte Kraftniveau Fmax an, bleibt dann während der Energiedissipation in einem Verformungselement weitgehend konstant, bis sie anschließend wieder steil ansteigt.The figure shows the belt force that occurs in the event of an accident over the time axis. The maximum permitted belt force F max is designated by line 16 . The belt force occurring in the event of an accident in conventional systems is shown by the dashed line 10 . In the theoretical case, which is denoted by the solid line 12 , the belt force initially rises to the predetermined force level F max , then remains largely constant during the energy dissipation in a deformation element until it then rises again steeply.

Bei dem erfindungsgemäßen Verfahren, das mit der gepunkteten Linie 14 dargestellt ist, wird zunächst ein möglichst steiler Anstieg der Gurtkraft auf ein vorbestimmtes Kraftniveau zugelassen, welches Fmax entspricht. Nach Erreichen dieses Kraftniveaus wird die Gurtkraft auf eine geringere Gurtkraft abgesenkt, welche beispielsweise durch einen Torsionsstab be­ stimmt wird. In the method according to the invention, which is represented by the dotted line 14 , the steepest possible increase in the belt force to a predetermined force level is first permitted, which corresponds to F max . After reaching this force level, the belt force is reduced to a lower belt force, which is determined, for example, by a torsion bar.

Das Ansteigen der Gurtkraft vor dem Zeitpunkt t0 kann beispielsweise durch das Abscheren von Scherstiften erzielt werden, die bei Überschrei­ ten einer vorbestimmten minimalen Gurtkraft abgetrennt werden. Das Ab­ senken der Gurtkraft von dem Niveau Fmax nach dem Zeitpunkt t0 kann beispielsweise durch ein Reibelemente erfolgen, das zwei Verzahnungen aufweist, die gegeneinander reiben und dabei Material, beispielsweise Kunststoff, abtragen.The increase in the belt force before the time t 0 can be achieved, for example, by shearing off shear pins which are separated when a predetermined minimum belt force is exceeded. The belt force can be reduced from the level F max after time t 0 , for example, by means of a friction element which has two toothings which rub against one another and thereby remove material, for example plastic.

Bei dem Niveau mit geringerer Gurtkraft, auf welches etwa zum Zeitpunkt t1 abgesenkt wird, kann es sich um das Kraftniveau eines herkömmlichen Gurtkraftbegrenzers, beispielsweise eines Torsionsstabes handeln.The level with a lower belt force, to which the temperature is lowered approximately at time t 1 , can be the force level of a conventional belt force limiter, for example a torsion bar.

Claims (5)

1. Verfahren zur Begrenzung der auf einen Fahrzeuginsassen im Falle eines Unfalls wirkenden Gurtkraft, wobei im Falle eines Unfalls:
zunächst ein rascher Anstieg der Gurtkraft auf ein vorbe­ stimmtes Kraftniveau zugelassen wird, das einer zugelassenen Maximalkraft entspricht, welcher der Fahrzeuginsasse ausgesetzt werden soll, und
anschließend die Gurtkraft von dem vorbestimmten Kraftniveau auf eine geringere Gurtkraft abgesenkt wird.1. A method for limiting the belt force acting on a vehicle occupant in the event of an accident, wherein in the event of an accident:
first, a rapid increase in the belt force to a predetermined force level is permitted, which corresponds to an authorized maximum force to which the vehicle occupant is to be exposed, and
then the belt force is reduced from the predetermined force level to a lower belt force. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zur Gurtkraftbegrenzung ein Torsionsstab verwendet wird, und daß die Gurtkraft auf das Kraftniveau abgesenkt wird, welches demjenigen des Torsionsstabes entspricht.2. The method according to claim 1, characterized in that a torsion bar is used to limit the belt force, and that the belt force is reduced to the force level which corresponds to that of the torsion bar. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Absenken der Gurtkraft mit geringerer Geschwindigkeit er­ folgt als das Ansteigen der Gurtkraft auf das vorbestimmte Kraftniveau. 3. The method according to claim 1, characterized in that lowering the belt force at a slower speed follows as the belt force increases to the predetermined one Force level.   4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Ansteigen der Gurtkraft auf das vorbestimmte Kraftniveau durch das Abscheren von Scherstiften eingeleitet wird.4. The method according to claim 1, characterized in that the increase in the belt force to the predetermined force level is initiated by shearing shear pins. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Absenken der Gurtkraft durch miteinander in Eingriff ste­ hende Reibelemente eingeleitet wird.5. The method according to claim 1, characterized in that the lowering of the belt force by engaging each other frictional elements is initiated.
DE2000146056 2000-09-18 2000-09-18 Belt force limiting process involves permitting a rapid build-up of belt force to preset level and thereafter reducing it Withdrawn DE10046056A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2000146056 DE10046056A1 (en) 2000-09-18 2000-09-18 Belt force limiting process involves permitting a rapid build-up of belt force to preset level and thereafter reducing it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000146056 DE10046056A1 (en) 2000-09-18 2000-09-18 Belt force limiting process involves permitting a rapid build-up of belt force to preset level and thereafter reducing it

Publications (1)

Publication Number Publication Date
DE10046056A1 true DE10046056A1 (en) 2002-03-28

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ID=7656590

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2000146056 Withdrawn DE10046056A1 (en) 2000-09-18 2000-09-18 Belt force limiting process involves permitting a rapid build-up of belt force to preset level and thereafter reducing it

Country Status (1)

Country Link
DE (1) DE10046056A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051415B4 (en) 2004-10-22 2019-05-02 Volkswagen Ag Force limiting device for a safety belt device of a motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517440A1 (en) * 1994-05-25 1995-11-30 Volkswagen Ag Safety belt retractor for vehicles with overload protection
DE29816280U1 (en) * 1998-09-10 1999-01-21 TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf Force limiting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517440A1 (en) * 1994-05-25 1995-11-30 Volkswagen Ag Safety belt retractor for vehicles with overload protection
DE29816280U1 (en) * 1998-09-10 1999-01-21 TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf Force limiting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051415B4 (en) 2004-10-22 2019-05-02 Volkswagen Ag Force limiting device for a safety belt device of a motor vehicle

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: TAKATA-PETRI (ULM) GMBH, 89081 ULM, DE

8139 Disposal/non-payment of the annual fee