Method and device for controlling triggering of at least one passenger protection device for a motor vehicle and safety system for a vehicle

1. A method for controlling a triggering of at least one passenger protection device for a vehicle, the method comprising:

determining whether a signal level of at least one read-in impact signal, which represents a change in a vehicle condition indicating a potential collision of the vehicle with a potential accident object, exceeds an evaluation limiting value;

setting a triggering threshold for controlling triggering of the at least one passenger protection device to a first triggering threshold value when the signal level of the at least one read-in impact signal exceeds the evaluation limiting value;

setting the triggering threshold to a second triggering threshold value when the signal level of the at least one read-in impact signal falls below the evaluation limiting value, the second triggering threshold value being lower than the first triggering threshold value; and

using the triggering threshold to control triggering of the at least one passenger protection device.

2. The method as recited in claim 1 , wherein in the determining step, determining whether the signal level of the at least one read-in impact signal exceeds the evaluation limiting value at least one of: i) before a minimum period prior to the potential collision has been reached, and ii) when the potential accident object is detected a maximum distance away from the vehicle.

3. The method as recited in claim 1 , wherein in the using step, the second triggering threshold value is used within a time window, which includes an ascertained point in time of the potential collision of the vehicle with an accident object.

4. The method as recited in claim 1 , wherein in using step, the first triggering threshold value is used when the signal level of the at least one read-in impact signal at least one of: i) exceeds the evaluation limiting value for a minimum period, and ii) exceeds the evaluation limiting value repeatedly within a minimum period.

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

reading in surroundings data with regard to surroundings of the vehicle; and

setting the triggering threshold to either the first triggering threshold value or a triggering threshold value different from the first triggering threshold value depending on the read-in surroundings data.

6. The method as recited in claim 5 , wherein in the reading in step, the surroundings data are read in by an interface to a device for providing map-based surroundings data, which represent a triggering threshold value recommended for at least one of: i) the surroundings of the vehicle, ii) a road condition characteristic of the surroundings of the vehicle, iii) a road surface characteristic of the surroundings of the vehicle, and iv) at least one additional road characteristic in the surroundings of the vehicle.

7. The method as recited in claim 5 , wherein in the reading in step, the surroundings data are read in from an interface to at least one detection device for providing sensor-based surroundings data representing at least one of: i) a road condition, ii) a road surface, and iii) at least one additional road characteristic in the surroundings of the vehicle.

8. The method as recited in claim 5 , wherein in the reading in step, the surroundings data are read in from an interface to at least one detection device for providing sensor-based surroundings data representing a potential accident object to ascertain the potential collision.

9. A device configured to carry out or activate a method for controlling a triggering of at least one passenger protection device for a vehicle, the method comprising:

determining whether a signal level of at least one read-in impact signal, which represents a change in a vehicle condition indicating a potential collision of the vehicle with a potential accident object, exceeds an evaluation limiting value;

setting a triggering threshold for controlling triggering of the at least one passenger protection device to a first triggering threshold value when the signal level of the at least one read-in impact signal exceeds the evaluation limiting value;

setting the triggering threshold to a second triggering threshold value when the signal level of the at least one read-in impact signal falls below the evaluation limiting value, the second triggering threshold value being lower than the first triggering threshold value; and

using the triggering threshold to control triggering of the at least one passenger protection device.

10. A safety system for a vehicle, comprising:

at least one passenger protection device; and

a device to:

determine whether a signal level of at least one read-in impact signal, which represents a change in a vehicle condition indicating a potential collision of the vehicle with a potential accident object, exceeds an evaluation limiting value;

set a triggering threshold for controlling triggering of the at least one passenger protection device to a first triggering threshold value when the signal level of the at least one read-in impact signal exceeds the evaluation limiting value;

set the triggering threshold to a second triggering threshold value when the signal level of the at least one read-in impact signal falls below the evaluation limiting value, the second triggering threshold value being lower than the first triggering threshold value; and

use the triggering threshold to control triggering of the at least one passenger protection device.

11. A non-transitory, machine-readable memory medium storing program instructions for controlling a triggering of at least one passenger protection device for a vehicle, the program instructions, when executed by a processor, causing the processor to perform:

determining whether a signal level of at least one read-in impact signal, which represents a change in a vehicle condition indicating a potential collision of the vehicle with a potential accident object, exceeds an evaluation limiting value;

setting a triggering threshold for controlling triggering of the at least one passenger protection device to a first triggering threshold value when the signal level of the at least one read-in impact signal exceeds the evaluation limiting value;

setting the triggering threshold to a second triggering threshold value when the signal level of the at least one read-in impact signal falls below the evaluation limiting value, the second triggering threshold value being lower than the first triggering threshold value; and

using the triggering threshold to control triggering of the at least one passenger protection device.