Abstract: The device comprises a pressure pump for pumping fuel from a reservoir to a ressure duct connected to an accumulator. This supplies a series of injectors for an internal combustion engine. The device further includes a pair of solenoid valves disposed between the pump and the accumulator, which are controlled by an electronic unit as a function of data on the pressure in the accumulator detected by a sensor. The solenoid valve is normally closed to discharge fuel received from the pump into the reservoir and is opened to deliver this fuel to the accumulator. On the other hand the solenoid valve is normally open to deliver fuel received to the accumulator and is closed to discharge the fuel from the accumulator into the reservoir. Between the two solenoid valves and is disposed a non-return valve.