Abstract: A variable delivery vane pump, in particular for oil, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about one own longitudinal axis (6), and presents a plurality of grooves (15) radially outwardly opened and slidingly engaged, each, by a respective vane (17) the vanes (17) being arranged essentially in contact with the stator (10) by interposing at least one sliding element (19; 27) extending about the axis (6) according to an angle smaller than 360°.

Abstract: A variable delivery vane pump, in particular for oil, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about one own longitudinal axis (6), and presents a plurality of outwardly radially open grooves (15) and slidingly engaged, each, by a respective vane (17) defined by at least two foils (25) reciprocally overlapped and slidingly coupled one to the other.

Abstract: A variable delivery vane oil pump, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about a longitudinal axis (6) thereof, and presents a plurality of grooves (15) radially outwardly opened and slidingly engaged, each, by a respective vane (17) the vanes (17) being arranged essentially in contact with the stator (10) by interposing a single sliding annular element (19).

Abstract: A variable delivery vane pump, in particular for oil, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about one own longitudinal axis (6), and presents a plurality of grooves (15) radially outwardly opened and slidingly engaged, each, by a respective vane (17) the vanes (17) being arranged essentially in contact with the stator (10) by interposing at least one sliding element (19; 27) extending about the axis (6) according to an angle smaller than 360°.

Abstract: An internal combustion engine presenting a number of cylinders, each defined by a respective axially symmetrical cavity formed in the engine block, and each defining, together with a piston sliding axially inside the cylinder and a head connected to the block, a combustion chamber served by a supply system on the head; the cylinders being divided into a first and second group, each composed of pairs of first and second cylinders arranged in a V and converging towards a respective drive shaft for each group; and the two groups being connected inverted and facing each other, so that the first and second cylinders in each pair of cylinders in the first group are connected at the respective head end so as to form a V with respective first and second cylinders in each corresponding pair of cylinders in the second group, and so that each pair of first cylinders in the two groups defines a first combustion chamber, and each pair of second cylinders in the two groups defines a second combustion chamber common to the

Abstract: A timing system, in particular for high performance internal combustion engines, having five or more valves per cylinder, is described. Three identical valves serving a given cylinder of an engine are controlled by a single camshaft by means of a pair of corresponding cams which act together with a pair of tappets which are mounted slidably in corresponding guides in the cylinder head. The tappets act together at the edges with corresponding valve stems of the three valves which are slidably mounted within second guides within the cylinder head, against the force of corresponding elastic means in a radially eccentric position with respect to the axis of the tappets in such a way that the valve stem of the intermediate valve acts simultaneously with both tappets, while the valve stems of the two lateral valves each act together with a corresponding different tappet in positions of mirror-image symmetry with respect to the center plane of the cylinder passing through the axis of the intermediate valve.

Abstract: A timing system for controlling, by means of a single overhead camshaft, three adjacent, homologous valves of an internal combustion engine cylinder; each valve having a tappet located between the valve stem and a respective control cam on the camshaft. The valve stems are arranged with their axes shifted laterally, and alternately on opposite sides, in relation to a plane including the axes of the tappets, so as to define a first eccentricity between each valve stem and respective tappet in a plane perpendicular to the camshaft axis. The intermediate valve item is aligned with the axis of the respective tappet in the first plane. In a plane perpendicular to the above plane the other two valve stems are both shifted laterally towards the intermediate valve stem, so as to define, with the respective tappets, a second eccentricity perpendicular to the first. The tappets may thus be arranged side by side and aligned centrally along the camshaft axis.