Patent ID: 7073490

Claim:
A gas-supply system for an internal-combustion engine, comprising: a plurality of electromagnetically controlled injectors, associated to the various cylinders of the engine; a distribution manifold or rail communicating with said injectors; a reservoir for supply of the rail, where pressurized gas is accumulated; and a pressure-reducing valve set in connection between the reservoir and the aforesaid rail; wherein said pressure-reducing valve comprises: a valve body, with an inlet connector connected to the reservoir and an outlet connector connected to the rail; a restricted passage defined inside the valve body for communication between the inlet connector and the aforesaid outlet connector; a valve head for control of the communication through said restricted passage; thrust means tending to keep the valve head in an open condition; and a piston member, movable inside the valve body, for controlling said valve head, said piston member being subject to the pressure of the gas downstream of the aforesaid restricted passage, and wherein said valve head is not movable with attached to said piston member; and said pressure downstream of the restricted passage tends to push the piston member towards a position in which it enables closing of the valve head.