METHOD AND CONTROL UNIT FOR ACTIVATING A SAFETY DEVICE FOR A VEHICLE IN A ROLLOVER SITUATION

• US 20130332032A1
• Filed: 06/11/2013
• Published: 12/12/2013
• Est. Priority Date: 06/11/2012
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: KORN, Christian, LANGOHR, Oliver
• Application Number:
  US13/915,250
• Publication Number:
  US 20130332032A1
• Time in Patent Office: Days
• US Class Current: 701/46
• 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 for activating a safety device for a vehicle in a rollover situation is described. The method includes determining an activation signal for activating the safety device based on a variable representing the angle of inclination of the vehicle in a transverse direction of the vehicle and a variable representing the steering angle of a wheel of the vehicle.

Claims

1. A method for activating a safety device for a vehicle in a rollover situation, the method comprising:

determining an activation signal for activating the safety device based on a variable representing an angle of inclination of the vehicle in a transverse direction of the vehicle and a variable representing a steering angle of a wheel of the vehicle.

2. The method as recited in claim 1, wherein the variable representing the angle of inclination of the vehicle in the transverse direction of the vehicle is a roll angle of the vehicle.

3. The method as recited in claim 1, wherein the variable representing the steering angle of the wheel of the vehicle is a steering angle of the vehicle.

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

providing a linkage of the variable representing the angle of inclination to the variable representing the steering angle, wherein an activation of the safety device is based on the linkage.

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

determining the activation signal based on at least one acceleration value representing a linear acceleration of the vehicle.

6. The method as recited in claim 5, further comprising:

ascertaining a rollover type of the rollover situation based on the at least one acceleration value; and

in the determining of the activation signal, determining the activation signal based on the rollover type, a roll angle of the vehicle, and the steering angle of the vehicle.

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

normalizing the steering angle using a maximally achievable steering angle of the vehicle to ascertain a normalized steering angle; and

in the step of determining the activation signal, determining the activation signal based on the normalized steering angle.

8. The method as recited in claim 2, further comprising:

determining a threshold value using a roll rate, the roll angle, and a steering angle of the vehicle; and

in the determining of the activation signal, determining the activation signal based on the threshold value.

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

in the determining of the threshold value, multiplying a normalized steering angle by a predefined steering angle constant as a function of a steering angle direction put in relation to the roll angle, in order to determine a correction value for the threshold value; and

determining the threshold value using the correction value.

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

in the determining of the threshold value, multiplying the roll angle by the steering angle as a function of a comparison of the roll angle with a maximum roll angle value and a comparison of the roll rate with a minimum roll rate value in order to obtain a result value; and

as a function of an algebraic sign of the result value, determining the threshold value by using one of;

the normalized steering angle normalized using a maximally achievable steering angle of the vehicle and the predefined steering angle constant, and

the normalized steering angle and another predefined steering angle constant.

11. A control unit for activating a safety device for a vehicle in a rollover situation, comprising:

an arrangement for determining an activation signal for activating the safety device based on a variable representing an angle of inclination of the vehicle in a transverse direction of the vehicle and a variable representing a steering angle of a wheel of the vehicle.

12. A safety equipment for a vehicle, comprising:

a safety device; and

a control unit for activating the safety device, the control unit comprising;

an arrangement for determining an activation signal for activating the safety device based on a variable representing an angle of inclination of the vehicle in a transverse direction of the vehicle and a variable representing a steering angle of a wheel of the vehicle.

13. A computer program product having program code that when executed on a device carries out a method for activating a safety device for a vehicle in a rollover situation, the method comprising:

determining an activation signal for activating the safety device based on a variable representing an angle of inclination of the vehicle in a transverse direction of the vehicle and a variable representing a steering angle of a wheel of the vehicle.