Arrangement for limiting uncontrolled articulation movements at a pivot between vehicle units

Claim 1

An arrangement in articulated vehicles for limiting uncontrolled articulation movements between a leading vehicle unit and a trailing vehicle unit articulatedly connected thereto and equipped with driving wheels which are driven by means of a driving unit, characterized in that at least one transducer is adapted to sense instantaneous speed of at least one driving wheel on the trailing vehicle unit and to send a signal corresponding to said speed to a comparator circuit where the transducer signal is compared with a reference signal representing a normal value for the wheel speed at the instantaneous vehicle speed, and that another transducer is adapted to sense instantaneous speed on at least one free-rolling vehicle wheel on the leading vehicle unit and to send a signal corresponding thereto to the comparator circuit for constituting the reference signal, the comparator circuit being adapted to give, if the difference between the instantaneous wheel speed signal and the reference signal exceeds a predetermined value, an outlet signal to at least one power control means for the driving unit which apportions transmittable force to the driving wheels in response to said signal, and/or to at least one regulating means regulating mechanical means directly affecting the articulation movement in response to said signal.