Granted Patent B2

US 12,637,042 · App. 18/458,465 · Granted May 26, 2026

Inventor: Kilian Förster (Beilngries, DE)

Assignee: AUDI AG

B60T8/1706B60T2210/12

Abstract

Claims (37)

1 . A method comprising:

determining, in a motor vehicle comprising two wheels, a first friction value associated with a first wheel;

determining, in the motor vehicle comprising the two wheels, a second friction value associated with a second wheel, wherein each wheel is associated with a parking brake and determining the first friction value and determining the second friction value is performed alternately;

comparing the first friction value and the second friction value to determine a difference between the first friction value and the second friction value; and

actuating each parking brake based upon the comparison of the first friction value and the second friction value, wherein the actuation includes at least control as a function of the difference between the first friction value and the second friction value and control as a function of a weight of the motor vehicle.

2 . The method according to claim 1 , further comprising:

increasing a clamping force of a respective parking brake associated with a wheel associated with a higher friction value based upon the difference between the first friction value and the second friction value.

3 . The method according to claim 2 , further comprising:

increasing the clamping force only after the difference between the first friction value and the second friction value is greater than 20%.

4 . The method according to claim 2 , wherein increasing the clamping force further comprises:

increasing a brake pressure in a hydraulic system from substantially 20 bar to substantially 25 bar.

5 . The method according to claim 2 , wherein increasing the clamping force further comprises:

increasing brake pressure in a range between 10% and 80%.

6 . The method according to claim 5 , further comprising:

increasing the brake pressure in a range between 15% and 50%.

7 . The method according to claim 6 , further comprising:

increasing the brake pressure by substantially 25%.

8 . The method according to claim 1 , further comprising:

determining the first friction value and the second friction value during rotation of each associated wheel.

9 . The method according to claim 8 , further comprising:

determining the first friction value and the second friction value based upon braking of each associated wheel.

10 . The method according to claim 1 , further comprising:

determining the first friction value and the second friction value based upon a steering angle of each associated wheel.

11 . The method according to claim 1 , further comprising:

determining the first friction value and the second friction value based upon an environmental parameter.

12 . The method according to claim 11 , further comprising:

retrieving the environmental parameter with a radio system from a server.

13 . The method according to claim 11 , further comprising:

optically detecting the environmental parameter with a camera.

14 . The method of claim 13 , wherein optically detecting the environmental parameter with the camera further comprises:

optically detecting an ice plate.

15 . The method of claim 1 , wherein the at least two types of control comprise continuous adjustment of control of each parking brake.

16 . The method of claim 1 , wherein the at least two types of control comprise only two different types of control.

17 . The method of claim 16 , wherein control of both parking brakes is identical when each friction value exceeds a first threshold and the difference between the first friction value and the second friction value is less than a second threshold.

18 . The method of claim 1 , further comprising:

comparing each friction value to a first threshold; and

issuing a warning after each friction value is below the first threshold.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (46)