Patent ID: 11904828
Assignee: ZF ACTIVE SAFETY US INC.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. A method of minimizing rollback of a vehicle as a result of wheel slip immediately following a hill start assist operation, the method comprising the steps of:
sensing a wheel speed for each wheel of q plurality of wheels of the vehicle;
calculating that the vehicle is on an inclined surface;
de-actuating each vehicle brake actuator upon completion of the hill start assist operation;
determining a rollback condition of the vehicle after release of each of the vehicle brakes;
detecting a wheel slip condition for each undriven or non-dominant driven wheel;
determining a split-mu road surface between the undriven or non-dominant driven wheels of the vehicle;
determining which respective undriven or non-dominant driven wheel has the highest coefficient of friction at tire/road surface interface;
actuating, by an electronic braking control module, the vehicle brake of the undriven or non-dominant driven wheel having q highest coefficient of friction for reducing the rollback of the vehicle down the hill.