Method for controlling the preload device of a two-level belt

• US 20060108787A1
• Filed: 05/06/2003
• Published: 05/25/2006
• Est. Priority Date: 07/06/2002
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Aust, Sabine, Czaykowska, Anja
• Granted Patent: US 7,416,042 B2
• Time in Patent Office: Days
• US Class Current: 280/806
• CPC Class Codes: B60R 2021/0051 Knees
• CPC Class Codes: B60R 21/0132 responsive to vehicle motion parameters , e.g. to vehicle longitudinal or transversal deceleration or speed value
• CPC Class Codes: B60R 21/0133 by integrating the amplitude of the input signal
• CPC Class Codes: B60R 21/01558 monitoring crash strength
• CPC Class Codes: B60R 22/195 with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel typeelectrical circuits for triggering safety arrangements B60R21/01
• CPC Class Codes: B60R 22/46 Reels with means to tension the belt in an emergency by forced winding upelectrical circuits for triggering safety arrangements B60R21/01 ; tensioners using reels only guiding the belt during normal use, e.g. splitted reels B60R22/195

Abstract

A method for triggering a two-stage belt tensioner is provided, in which the second stage of the belt tensioner is triggered as a function of a crash severity and a sitting position. The crash severity is determined by a signal derived from an acceleration and determined during a collision, and the sitting position brings an influence to bear on the evaluation of this signal.

Claims

1-7. -7. (canceled)

8. A method for triggering a two-stage belt tensioner, comprising:

triggering a first stage of the belt tensioner; and

triggering a second stage of the belt tensioner as a function of a crash severity and a sitting position, the crash severity being determined by at least one signal derived from an acceleration ascertained during a collision, and the sitting position determining an evaluation of the at least one signal.

9. The method as recited in claim 8, wherein, if the crash severity indicates a hard crash, the second stage is triggered after a specified time following the triggering of the first stage.

10. The method as recited in claim 8, wherein, if the crash severity indicates a soft crash, the second stage is triggered as a function of a signal pattern of the at least one signal.

11. The method as recited in claim 8, wherein the second stage is triggered with the second airbag stage.

12. The method as recited in claim 8, further comprising:

triggering a knee airbag simultaneously with the second stage belt tensioner.

13. A triggering device comprising:

a control unit configured to trigger a first stage of a two-stage belt tensioner, the device further configured to trigger a second stage to the belt tensioner as a function of a crash severity and a sitting position, the crash severity being determined by at least one signal derived from an acceleration ascertained during a collision and the sitting position determining an evaluation of the at least one signal.

14. The triggering device as recited in claim 13, further comprising:

an external crash sensor to determine the acceleration.