Abstract: A butterfly valve for an internal combustion engine; a valve body houses a valve seat engaged by a butterfly body keyed on a shaft in order to rotate between an open position and a closed position under the action of an electric actuator coupled to the shaft by means of a cascade of gears; the electric actuator has a cylindrical body which is bounded at the location of tits base by a metal plate electrically connected to the valve body and provided with a pair of through holes through which two electrical conductors pass and supply electricity to the electric actuator; two respective bushings are interposed between the conductors and the holes of the plate, each of which is disposed electrically in contact both with the metal plate and with the respective electrical conductor and is made from partially conducting material having a specific resistance of between 103 and 106 Ohm·cm.

Abstract: A pipe constituted by an inner wall produced with a first high-performance thermoplastic polymeric material having a distortion temperature under load in accordance with standard HDT-A ISO75 of at least 275° C. and an outer wall produced from a second thermoplastic material belonging to the same family of chemical polymers as the high-performance thermoplastic material and coinjected therewith for production of the pipe itself.

Abstract: Gate for throttle valves composed of a central supporting portion constituted by a thermoplastic material and an edge portion constituted by a thermoplastic elastomeric material belonging to the same chemical family as the thermoplastic material; the gate is produced by means of a coinjection process of the thermoplastic material and the thermoplastic elastomeric material.