Abstract: The device comprises a housing formed by a cup-shaped body and a bell-shaped cover secured to the body, a deformable membrane secured to the housing and forming, together with the body, a chamber for the fuel, a movable shutter member designed to bring the chamber into communication with an outlet opening; the device is characterized in that at least one hole is provided in the base wall of the body for the inlet of the fuel into the chamber and a bearing seat for a sealing ring arranged so that it can be interposed between the seat and a corresponding seat of a housing in which the lateral wall of the body is inserted is provided on the lateral wall of the body.

Abstract: A process for the manufacture of a fuel manifold designed to supply fuel to a number of fuel injectors includes forming the end of each of a number of cup shaped fittings into a rod having an axial hole, forming on an elongated semifinished metal part a series of seats for the aforementioned rods, inserting the rods inside the seats an permanently deforming the rods against the respective seats for securing the fittings to the semifinished metal part.

Abstract: The device comprises substantially an integral connection block for connection to an air manifold and to an engine wall; in said block there is provided a plurality of pairs of main air feed holes, one hole of each pair being controlled by a throttle valve; in the block there is also provided a series of supplementary idling air ducts the passage of which is controlled by a solenoid modulating valve housed in a suitable seat in the block. On the block there is also provided a series of seats for the injectors, and a pair of ducts for feeding fuel to the injectors and for its recirculation. Finally, on the block there are provided further seats for a fuel pressure regulator and for a pneumatic actuator arranged to control said throttle valves by way of a transmission.

Abstract: The unit is constituted by a manifold defining a fuel duct for fuel which is supplied to the injectors and by a pressure regulator operable to maintain the pressure of the fuel substantially constant within the manifold. The unit substantially comprises a chamber which is formed within and at one end of the said duct and which is separated from the remaining part of this duct by means of a separation element inserted into the duct itself and shaped in such a way as to define channels for the fuel between the chamber and the remaining part of the duct itself.