NOVELTY - A system for producing hydrogen gas used in powering an internal combustion engine of a vehicle comprises: (a) a hydrogen reactor (12) comprising a chamber (14) and set of electrode plates (16) arranged in a predetermined stacked array within the chamber; (b) a jet (18) disposed and structured to direct a flow of water, under pressure, between and along a length of the electrode plates within the chamber; and (c) metal particles (20) mixed with the water for increasing a collection surface area of generated gases.    USE - The system is useful for producing hydrogen gas used in powering an internal combustion engine of a vehicle (claimed).    ADVANTAGE - The system is physically structured and dimensioned to be efficiently mounted on a vehicle platform which is capable of generating sufficient hydrogen and oxygen gases to interact, as a supplement, with conventional fossil fuels. It significantly reduces the consumption of conventional fuels while increasing fuel efficiency under acceptable operating conditions of the internal combustion engine.    DETAILED DESCRIPTION - A system for producing hydrogen gas used in powering an internal combustion engine of a vehicle comprises: (a) a hydrogen reactor (12) comprising a chamber (14) and set of electrode plates (16) arranged in a predetermined stacked array within the chamber, where the set of electrode plates comprises neutral, positively charged, and negatively charged plates disposed in a predetermined spaced position relative to one another to define the predetermined stacked array; (b) a jet (18) disposed and structured to direct a flow of water, under pressure, between and along a length of the electrode plates within the chamber; and (c) metal particles (20) mixed with the water for increasing a collection surface area of generated gases, where the metal particles and the water are concurrently directed by the jet between and along the length of the set of electrode plates; where the hydrogen reactor is structured to produce hydrogen gas through electrolytic decomposition of the water electrolyte, and where the neutral, positively, and negatively charged plates are cooperatively disposed and structured with the metal particles to facilitate increased production of hydrogen gas.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the system for producing hydrogen gas used in powering an internal combustion engine of a vehicle.    Hydrogen reactor (12)    Chamber (14)    Electrode plates (16)    Jet (18)    Metal particles (20)