Method for a stability control of a trailer

The present invention relates to a method for a stability control of a trailer (1), in particular a semi-trailer (2) or a center axle trailer. According to the inventive method, in a first step a vehicle lateral velocity rate of change v is determined on the basis of v = a y - ur with the lateral acceleration a y , the trailer velocity u and the yaw rate r. The determined vehicle lateral velocity rate of change v is then compared with a threshold T. In the next step of the inventive method in case of the determined vehicle lateral velocity rate of change v exceeding the threshold T a brake actuation of one curve outer wheel (3 of ) of the trailer (1) is automatically initiated. In particular, the curve outer wheel is activated with a brake force (11 of ) controlled to equal or be limited to F B,max with F B,max = F L t w / (2d) with the lateral force F L , the track width t w and the longitudinal distance of the wheel from the center of gravity d. The inventive method effectively controls a trailer for increasing the instability of the trailer (1) against trailer swing with reduced brake and tyre wear.