Abstract: An injection valve comprising a hollow casing containing an electromagnetic winding connected to a source of electric pulses, an armature in the casing near the winding, a likewise hollow nozzle held by the casing so as to extend therein for a length defined by the geometrical requirements of the intake manifold so as suitably to position the fuel discharge aperture at the front end of the manifold, a closure means having a first end secured to the armature, an external surface coupled to the inner surface of the nozzle, to guide the travel of the closure means, and a second end comprising a conical part adapted to come in contact with a conical seat formed in the nozzle immediately upstream of a bore and bearing a fuel-atomizing deflector which co-operates with the bore in the nozzle to define the fuel discharge aperture, the conical part forming a seal when, under the action of a resilient force, it is in contact with the conical seat whereas it opens the discharge aperture under the action of the magnetic

Abstract: A pressure regulator is provided for the fuel injection system of a spark ignition internal combustion engine. The regulator is designed to regulate the pressure at which fuel is delivered to the fuel injectors, this pressure being constantly referenced to a predetermined value for the purpose of maintaining the correct air/fuel mixture ratio for all conditions of use of the engine. In general terms, the regulator comprises an arrangement of various mechanical components which act to divide the flow of fuel delivered by a supply pump into two parts; one part of this flow is supplied to the injectors which take up the quantity required by the operating conditions of the engine, the remaining part being returned to the motor vehicle tank. To facilitate manufacture and assembly of the regulator, a particular form is given to the regulator valve element used to effect division of the fuel flow.