Patent ID: 7114787

Claim:
Braking system for a utility vehicle trailer having a steerable front axle, the system comprising: front axle brake cylinders, rear axle brake cylinders, and rotational wheel speed sensors; an ABS valve assigned jointly to both front axle brake cylinders for controlling brake pressure into the front axle brake cylinders; an EBS module assigned to the rear axle brake cylinders for controlling brake pressure into the rear axle brake cylinders; an electric control output of the EBS module coupled with an electric control input of the ABS valve; wherein the rotational wheel speed sensors are connected to the EBS module for determining a differential slip (Δs) between the steerable front axle and a rear axle of the trailer; wherein the EBS module controls the ABS valve as a function of the determined differential slip (Δs); and wherein the differential slip (Δs) is determined from a mean front axle speed (v VA ) and a front axle reference speed (v VA,Ref ), according to the formula: Δ ⁢ ⁢ s = v VA - v VA , Ref v VA , Ref = v VA v VA , Ref - 1.