NOVELTY - The hydrogen generation device comprises a power source (20), an accumulator (40) in communication with the power source having an internal cavity for the storage of fluid, a hydrogen generator (100) in electrical communication with the power source and in fluid communication with the accumulator, and a controller (290) in electronic communication with the power source, the generator and the accumulator for controlled generation and transfer of hydrogen gas between the generator and the internal combustion engine. The generator has a first electrode and a second electrode.    USE - The hydrogen generation device is useful for supplementing hydrogen fuel to an internal combustion engine such as passenger and commercial vehicles.    ADVANTAGE - The hydrogen generation device is easy and economical to manufacture, and effectively produces hydrogen with improved fuel efficiency, increased hydrogen generation output and reduced power and gasoline consumption.    DETAILED DESCRIPTION - The hydrogen generation device comprises a power source (20), an accumulator (40) in communication with the power source having an internal cavity for the storage of fluid, a hydrogen generator (100) in electrical communication with the power source and in fluid communication with the accumulator, and a controller (290) in electronic communication with the power source, the generator and the accumulator for controlled generation and transfer of hydrogen gas between the generator and the internal combustion engine. The generator has a first electrode and a second electrode positioned in an internal cavity (58) and separated from one another, a third electrode, a fourth electrode, and a separator having a longitudinal axis and longitudinally and radially spaced apertures about the axis. A hydrogen gas is produced and is transferred to the accumulator on supply of power to the electrodes. The apertures of the separator comprise a first series, a second series and a third series of apertures radially spaced from each other in concentric orientation about the axis and repeating longitudinally along the longitudinal axis. The first and the second electrodes are separately and alternatingly threaded through the first series of apertures positioned radially from the axis with respect to the second and the third series apertures and helically wound about the separator axis. The third and fourth electrodes are separately and alternatingly threaded though the second and third series of apertures and helically wound about the axis. The first, second, third and fourth electrodes have same linear length. The accumulator includes a hydrogen gas reservoir in communication with the generator and the internal combustion engine, and a baffle positioned in the cavity in communication with the fluid to suppress dynamic movement of the fluid in the accumulator cavity. The separator and the baffle comprise two planar members intersecting at a longitudinal axis forming four angularly spaced fins. Each fin has a longitudinally and radially spaced aperture for controlled passage of fluid through the fin. INDEPENDENT CLAIMS are included for:    (1) a method for supplementing hydrogen gas fuel for an internal combustion engine; and    (2) an apparatus for supplementing hydrogen gas fuel for an internal combustion engine.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a hydrogen fuel supplementation system.    Power source (20)    Accumulator (40)    Interior cavity (58)    Generator (100)    Controller. (290)