Method for operating a safety system of a motor vehicle and motor vehicle

1. A method for operating a safety system of a motor vehicle comprising the steps of:

after an unavoidable collision, determining a target trajectory of the motor vehicle to be realized with the safety system, wherein the target trajectory is assigned to a target position of the motor vehicle, which target position is safe with regard to secondary collisions; and

performing at least one autonomous and/or supporting driving intervention in the form of at least one of a longitudinally guiding intervention and a transverse guiding intervention after the collision for realizing the target trajectory.

2. The method of claim 1 , wherein the safety system is a system for mitigating consequences of the unavoidable collision.

3. The method of claim 1 , wherein the target trajectory is determined by using environmental data regarding an environment of the motor vehicle.

4. The method of claim 3 , wherein the target trajectory is determined before the unavoidable collision, and wherein the unavoidable collision is influenced as a function of the target trajectory.

5. The method of claim 1 , wherein the target trajectory is determined by taking an environmental model into account, wherein different standstill positions in a vicinity of the motor vehicle are each assigned a value which is commensurate with a safety of the standstill position with regard to secondary collisions.

6. The method of claim 1 , further comprising determining possible static and/or moving collision partners by detecting an environment of the motor vehicle, wherein for determining the safety of the target position and/or a standstill position of the motor vehicle the static and/or moving collision partners are taken into account.

7. The method of claim 6 , wherein at least one of a type, an actual dynamic and a predicted trajectory of the possible collision partner is taken into account for determining the safety of the target position and/or the standstill position of the motor vehicle.

8. The method of claim 1 , further comprising

continuously monitoring systems of the motor vehicle to be controlled; and when the target position and/or the target trajectory cannot be reached and the systems to be controlled at least partially fail,

recalculating the target position and/or the target trajectory and/or taking the at least partial failure into account when cyclically recalculating the target position and/or the target trajectory into account.

9. The method of claim 8 , wherein the systems of the motor vehicle to be controlled are continuously monitored after the unavoidable collision.

10. The method of claim 8 , wherein the systems of the motor vehicle to be controlled include at least one member selected from the group consisting of a braking system, a motor and a steering.

11. The method of claim 8 , further comprising transmitting a message regarding the at least partial failure of the systems to be controlled via at least one communication means for communicating with other road users.

12. The method of claim 8 , wherein the systems of the motor vehicle to be controlled include at least one member selected from the group consisting of a braking system, a motor, a steering system, an ESP-system, an active chassis system, an active suspension system, an active stabilizer system, a raisable hood, and a system for adjusting a trim position.

13. The method of claim 1 , wherein for determining the target position and/or the target trajectory, information regarding a member selected from the group consisting of a seat occupation, a loading state of the motor vehicle, a structure of the motor vehicle, a deformation potential of a particular region of the motor vehicle, and regions of the motor vehicle which are critical in case of collisions is taken into account.

14. The method of claim 12 , wherein the information regarding the deformation potential of the particular region includes information regarding previous damage to the particular region and/or damage to the particular region caused by the unavoidable collision.

15. The method of claim 1 , further comprising communicating with other road users via at least one communication means for coordinating an evasive and/or placement strategy and/or transmitting data which describe the secondary collision to a central server.

16. The method of claim 15 , wherein the central server is a traffic control center.

17. The method of claim 1 , wherein for determining the target position and/or the target trajectory, data of at least one member selected from the group consisting of a yawing sensor, a roll angle sensor, a pitch angle sensor, a steering angel sensor, a friction coefficient sensor, a longitudinally guiding driver assist system, a camera, a laser scanner, a radar sensor, an ultrasonic sensor, an infrared sensor, a LIDAR-sensor, a GPS-sensor, a communication means for communicating with other road users and a crash sensor.

18. The method of claim 1 , further comprising, assisting a driver of the motor vehicle in attaining the safe target position.

19. The method of claim 18 , wherein the driver is assisted in attaining the safe target position by amplifying and/or attenuating a longitudinally guiding and/or transverse guiding intervention carried out by the driver, and/or by displaying the target position and/or a target location and/or and/or a target orientation of the target position.

20. The method of claim 19 , wherein the target position and/or the target location and/or the target orientation of the target position is displayed on a Head-Up-Display.

21. A motor vehicle, comprising a control device for implementing the method of claim 1 .