Braking system of a vehicle

1 . A braking system of a vehicle, comprising:

at least one brake control system with a brake pressure regulator which, in case of a braking request, builds up a hydraulic brake pressure by which wheel brakes of the vehicle can be actuated, wherein the brake control system is attached to a body of the vehicle via a holder;

wherein, for detection of a holder failure, an evaluation unit is provided, which acquires a sensor signal curve from an internal sensor built into the brake control system;

wherein, in the evaluation unit, a signal comparison occurs, wherein the acquired sensor signal curve is compared to a reference signal curve, and wherein, in case of a significant deviation of the acquired sensor signal curve from the reference signal curve, the evaluation unit generates a holder damage signal.

2 . The braking system according to claim 1 , wherein the internal sensor built into the brake control system is a filling level sensor of a hydraulic fluid container of the brake control system.

3 . The braking system according to claim 1 , wherein the internal sensor built into the brake control system is an acceleration sensor, on the basis of which an electronic stability control actuates the brake control system, in order to perform braking engagements.

4 . The braking system according to claim 1 , wherein:

the braking system is implemented as a brake-by-wire system;;

the brake control system forms a primary brake control system and, additionally, a secondary brake control system is provided, which, in case of an incorrect operation of the primary brake control system assumes the function of the primary brake control system; and

the two brake control systems together are attached to the holder.

5 . The braking system according to claim 1 , wherein;

the evaluation unit is additionally in signal connection with an external sensor not built into the brake control system, which external sensor, in case of vehicle vibrations during driving operation, generates a corresponding vehicle vibration signal;

before the performance of the signal comparison, the evaluation unit subtracts the vehicle vibration signal from the sensor signal curve acquired from the internal sensor, so as to form a modified sensor signal curve which is cleaned of a vibration component attributed to the vehicle vibrations; and

the signal comparison is performed with the modified sensor signal curve as the acquired sensor signal curve.

6 . The braking system according to claim 5 , wherein the evaluation unit checks for a presence of holder failure only if the vehicle vibrations acquired by the external sensor are below a limit value, so that an incorrect generation of the holder damage signal due to vehicle vibrations above the limit value is prevented.

7 . The braking system according to claim 1 , wherein the reference signal curve is a signal curve of the internal sensor which appears during normal driving operation as well as in case of the holder being intact.

8 . The braking system according to claim 4 , wherein:

a second internal sensor is built in the secondary brake control system; and

the sensor signal curve of the internal sensor is compared, in the evaluation unit, to a sensor signal curve acquired from the second internal sensor, so that the sensor signal curve of one internal sensor forms the reference signal curve for the sensor signal curve of the other internal sensor.

9 . A method for detecting a holder failure in a braking system according to claim 1 , the method being executable by the evaluation unit and comprising the steps of:

acquiring the sensor signal curve from the internal sensor;

comparing the acquired sensor signal curve to the reference signal curve; and

generating the holder damage signal in case of significant deviation of the acquired sensor signal curve from the reference signal curve.

10 . The braking system according to claim 2 , wherein:

the braking system is implemented as a brake-by-wire system;

the brake control system forms a primary brake control system and, additionally, a secondary brake control system is provided, which, in case of an incorrect operation of the primary brake control system assumes the function of the primary brake control system; and

the two brake control systems together are attached to the holder.

11 . The braking system according to claim 3 , wherein:

the braking system is implemented as a brake-by-wire system;

the brake control system forms a primary brake control system and, additionally, a secondary brake control system is provided, which, in case of an incorrect operation of the primary brake control system assumes the function of the primary brake control system; and

the two brake control systems together are attached to the holder.

12 . The braking system according to claim 2 , wherein:

the evaluation unit is additionally in signal connection with an external sensor not built into the brake control system, which external sensor, in case of vehicle vibrations during driving operation, generates a corresponding vehicle vibration signal;

before the performance of the signal comparison, the evaluation unit subtracts the vehicle vibration signal from the sensor signal curve of acquired from the internal sensor, so as to form a modified sensor signal curve which is cleaned of a vibration component attributed to the vehicle vibrations; and

the signal comparison is performed with the modified sensor signal curve as the acquired sensor signal curve.

13 . The braking system according to claim 3 , wherein:

the evaluation unit is additionally in signal connection with an external sensor not built into the brake control system, which external sensor, in case of vehicle vibrations during driving operation, generates a corresponding vehicle vibration signal;

before the performance of the signal comparison, the evaluation unit subtracts the vehicle vibration signal from the sensor signal curve acquired from the internal sensor, so as to form a modified sensor signal curve which is cleaned of a vibration component attributed to the vehicle vibrations; and

the signal comparison is performed with the modified sensor signal curve as the acquired sensor signal curve.

14 . The braking system according to claim 4 , wherein;

the evaluation unit is additionally in signal connection with an external sensor not built into the brake control system, which external sensor, in case of vehicle vibrations during driving operation, generates a corresponding vehicle vibration signal;

before the performance of the signal comparison, the evaluation unit subtracts the vehicle vibration signal from the sensor signal curve acquired from the internal sensor, so as to form a modified sensor signal curve which is cleaned of a vibration component attributed to the vehicle vibrations; and

the signal comparison is performed with the modified sensor signal curve as the acquired sensor signal curve.

15 . The braking system according to claim 2 , wherein the reference signal curve is a signal curve of the internal sensor which appears during normal driving operation as well as in case of the holder being intact.

16 . The braking system according to claim 3 , wherein the reference signal curve is a signal curve of the internal sensor which appears during normal driving operation as well as in case of the holder being intact.

17 . The braking system according to claim 4 , wherein the reference signal curve is a signal curve of the internal sensor which appears during normal driving operation as well as in case of the holder being intact.

18 . The braking system according to claim 5 , wherein the reference signal curve is a signal curve of the internal sensor which appears during normal driving operation as well as in case of the holder being intact.

19 . The braking system according to claim 6 , wherein the reference signal curve is a signal curve of the internal sensor which appears during normal driving operation as well as in case of the holder being intact.