Abstract: A self-steering running gear for rail vehicles includes at least one Bissel-type axle. Through a proper geometrical proportioning of the running gear, the Bissel-type axle is oriented in a perfectly radial condition along a constant radius curve, in a real or in a virtual mode. In both cases perfectly radial orientation along a constant radius curve of at least another steerable axle of the running gear may be operated. Expedients are further provided to reduce the effects deriving from the sum of radiality errors of the axles during the transition phases.

Abstract: A railway vehicle having a variable trim body, comprising two bogies with respective frameworks and swinging transverse members, articulated connection levers between each swinging transverse member and the body, and a body roll control system to perform, while the vehicle is running along a curve, rotations of the body around a longitudinal axis so as to limit the non-compensated centrifugal acceleration acting on the body. The control system employs linear double-effect actuators acting on the articulated connection levers, whereby the body rotations are operated by virtue of the rotations of these levers.

Abstract: A railway vehicle having a variable trim body, comprising two bogies with respective swinging transverse members pivotally connected to the body, and a control system for controlling roll of the body about its longitudinal axis, by use of linear actuators interposed between the swinging transverse members and the opposite sides of the body and operated through a regulation electronic unit connected to a first transducer device detecting the non-compensated centrifugal acceleration acting on the body, and to a second transducer device comprising at least two angular transducers for detecting the momentary relative angle between each swinging transverse member and the body.