Method for generating a firing decision for a restraining system

• US 7,460,937 B2
• Filed: 10/06/2003
• Issued: 12/02/2008
• Est. Priority Date: 01/28/2003
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schmid, Michael, Lahmann, Robert, Kroeninger, Mario
• Primary Examiner(s): Keith; Jack W
• Assistant Examiner(s): PIPALA, EDWARD J
• Application Number:
  US10/543,010
• Publication Number:
  US 20060229783A1
• Time in Patent Office: 1,884 Days
• Field of Search: 701/45, 701/46, 701/47, 180/271, 280/734, 280/735
• US Class Current: 701/45
• CPC Class Codes: B60G 2800/9124 Roll-over protection systems, e.g. for warning or control
• CPC Class Codes: B60R 2021/01313 monitoring the vehicle steering system or the dynamic control system
• CPC Class Codes: B60R 2021/01327 Angular velocity or angular acceleration
• 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 21/01336 using filtering

Abstract

A method is provided for generating a triggering decision for a restraint system, in which method the triggering decision is generated as a function of a conjunction of the vehicle lateral acceleration and a rate of rotation. The vehicle lateral acceleration is additionally subjected to a threshold value decision, the respective threshold value being set as a function of at least one component of the velocity of the vehicle'"'"'s center of gravity.

Claims

1. A method for generating a triggering decision for a restraint mechanism in a vehicle, comprising:

ascertaining at least a velocity of the vehicle'"'"'s center of gravity, a vehicle lateral acceleration, and a rate of rotation about the longitudinal axis of the vehicle;

comparing the vehicle lateral acceleration to a first threshold value, wherein the first threshold value is set at least as a function of at least one component of the velocity of the vehicle'"'"'s center of gravity, wherein the comparing results in a first triggering decision;

conjoining at least the vehicle lateral acceleration and the rate of rotation about the longitudinal axis of the vehicle, wherein the conjoining results in at least a second triggering decision; and

generating the triggering decision for the restraint mechanism in the vehicle, wherein the generating takes into account at least the first and second triggering decisions.

2. The method as recited in claim 1, wherein the conjoining is performed in such a way that at least one of the vehicle lateral acceleration and the rate of rotation about the longitudinal axis of the vehicle is compared to at least one pair of values, the at least one pair of values being formed as a function of the at least one component of the velocity of the vehicle'"'"'s center of gravity.

3. The method as recited in claim 2, wherein at least one set of pairs of values for the at least one component of the velocity of the vehicle'"'"'s center of gravity is stored, and wherein a new set of pairs of values is obtained by extrapolation from the at least one set that is stored.

4. The method as recited in claim 1, further comprising:

comparing the at least one component of the velocity of the vehicle'"'"'s center of gravity to a second threshold value that is a function of a type of the vehicle, wherein triggering of the restraint mechanism is prevented if the second threshold value is not reached.

5. The method as recited in claim 3, wherein determination of the at least one set of pairs of values is influenced as a function of a precision of the velocity estimate for the at least one component of the velocity of the vehicle'"'"'s center of gravity.

6. The method as recited in claim 1, further comprising:

comparing the rate of rotation to a third, fixed threshold value.

7. The method as recited in claim 1, further comprising:

comparing the rate of rotation to a third threshold value, the third threshold value being set as a function of the at least one component of the velocity of the vehicle'"'"'s center of gravity.

8. The method as recited in claim 1, wherein the first threshold value is varied as a function of the rate of rotation.

9. The method as recited in claim 1, further comprising:

comparing the at least one component of the velocity of the vehicle'"'"'s center of gravity to a second threshold value that is a function of a type of the vehicle, wherein triggering of the restraint mechanism is prevented if the second threshold value is not reached;

wherein at least one set of pairs of values for the at least one component of the velocity of the vehicle'"'"'s center of gravity is stored, and wherein a new set of pairs of values is obtained by extrapolation from the at least one set that is stored.

10. The method as recited in claim 9, wherein determination of the at least one set of pairs of values is influenced as a function of a precision of the velocity estimate for the at least one component of the velocity of the vehicle'"'"'s center of gravity.

11. The method as recited in claim 10, further comprising:

comparing the rate of rotation to a third, fixed threshold value.

12. The method as recited in claim 9, further comprising:

comparing the rate of rotation to a third, fixed threshold value.

13. The method as recited in claim 10, further comprising:

comparing the rate of rotation to a third threshold value, the third threshold value being set as a function of the at least one component of the velocity of the vehicle'"'"'s center of gravity.

14. The method as recited in claim 9, further comprising:

comparing the rate of rotation to a third threshold value, the third threshold value being set as a function of the at least one component of the velocity of the vehicle'"'"'s center of gravity.

15. The method as recited in claim 10, wherein the first threshold value is varied as a function of the rate of rotation.

16. The method as recited in claim 9, wherein the first threshold value is varied as a function of the rate of rotation.

17. The method as recited in claim 10, further comprising:

comparing the rate of rotation to a third, fixed threshold value;

wherein the first threshold value is varied as a function of the rate of rotation.

18. The method as recited in claim 9, further comprising:

comparing the rate of rotation to a third, fixed threshold value;

wherein the first threshold value is varied as a function of the rate of rotation.

19. The method as recited in claim 10, further comprising:

comparing the rate of rotation to a third threshold value, the third threshold value being set as a function of the at least one component of the velocity of the vehicle'"'"'s center of gravity;

wherein the first threshold value is varied as a function of the rate of rotation.

20. The method as recited in claim 9, further comprising:

comparing the rate of rotation to a third threshold value, the third threshold value being set as a function of the at least one component of the velocity of the vehicle'"'"'s center of gravity;

wherein the first threshold value is varied as a function of the rate of rotation.