Abstract: A control device for an articulated road train provided with a system for detecting pivoting and articulating angles between the central longitudinal axes of the tractor and a semi-trailer coupled thereto by a coupling pin during coupling and parking and/or a control device for an articulated road train provided with a system for detecting pivoting and articulating angles between the central longitudinal axes of a drawbar and a trailer which is coupled by the drawbar during coupling and parking. The system has a plurality of Hall sensors (21) arranged side-by-side on the arc of a circle and a constant magnet (30) interacting therewith in such a way that it acts on the nearest Hall sensor according to the radial position thereof, a required angle (?) being determined on the basis of the excited Hall sensor position.

Abstract: The invention relates to a coupling device for the coupling of a trailer vehicle to a tractor engine, comprising, on the tractor engine, a coupling body (10), with an insertion opening (11) and pneumatically-operated coupling bolt (12) and, on the trailer, a drawbar (20), with a drawbar eye (21), for the passage of the coupling bolt (12). A tubular piece (13) is arranged below the coupling body (10), coaxially rotating about the geometrical axis (Z-axis) of the coupling bolt (12), at the lower end of which a cylindrical shell (15) is embodied at an angle of 90° to the geometrical axis (X1-axis) of the coupling bolt (12). A rotating cylindrical piece (16) is arranged in the shell (15), with a block (17), embodied on the free peripheral section thereof, with pins (18) for electrical connections and at least two hollow guide bolts (19) for pneumatic and mechanical connection with a bush piece (22), projecting from the trailer, arranged on the free front face thereof.