Patent ID: 11970169
Assignee: ZF CV SYSTEMS EUROPE BV
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. An antilock control method for a braking system of a vehicle, the antilock control method comprising the following steps upon input of a brake request signal (S1):
outputting a brake control signal (S2);
building up a brake pressure (pb) via a braking medium at a wheel brake of a vehicle wheel (St1, t0);
measuring a wheel speed (n) of the vehicle wheel to be braked (St3);
determining at least one of the following:
i) a wheel slip (s) of the wheel; and,
ii) wheel circumferential velocity (v2) of the vehicle wheel; and,

upon satisfying a first traction criterion (K1),
i) activating a wheel drive unit; and,
ii) applying a wheel drive torque (M2) to the vehicle wheel to increase the wheel circumferential velocity (v2) and to reduce the wheel slip (s) until a second traction criterion (K2) is satisfied;

wherein at least one of the following applies:
i) in the first traction criterion (K1), the determined wheel slip (s) is compared to a first slip limiting value (sg1) and the first traction criterion (K1) is satisfied when the determined wheel slip (s) exceeds the first slip limiting value (sg1); and,
ii) a locking tendency of the vehicle wheel is assessed and the first traction criterion (K1) is satisfied when the locking tendency of the vehicle wheel is greater than a predefined limiting value of the locking tendency of the vehicle wheel.