Method for monitoring brakes for motor vehicles, brake system for implementing the method, and motor vehicle having such a brake system

摘要

The invention relates to a method for the monitoring of a pneumatically actuable brake 3 for a motor vehicle, in which the air gap 8 of the brake 3 is also referred to the measured position value 13 of a brake wear sensor 12. And the air gap 8 of the brake 3 is less than a predetermined lower limit value 39 or the calculated air gap 8 exceeds a predetermined upper limit value 38. If so, defect 27 is inferred. The invention additionally relates to a brake system 4 having monitoring electronics 16 for carrying out the method, and to a motor vehicle having such a brake system 4. In order to improve the reliability for monitoring the brake air gap 8 with the least possible hassle, according to the invention, the brake wear sensor in the following steps: Calculation of 12 reference position values 25, calculation of a plurality of value pairs 20 from the discontinuous position value 23 throughout the braking operation 24 and the current brake pressure P at the same time point 26, said value Calculation 30 of the characteristic function 21 interpolating the pair 20, calculation 32 of the characteristic position value 33 according to the characteristic function 21 for the selected brake pressure 35, and the reference position value from the characteristic position value 33 A step 36 of calculating the actual value 18 of the air gap 8 by subtracting 25 is performed.