PURPOSE: To make water into inization as well as to aim at improvements in a rate of fuel consumption and exhaust gas emission control, by sticking a radioactive alloy thin plate on both of a contact part of air-fuel mixture gas a inside combustion chamber of an exhaust pipe in an internal-combustion engine and each internal surface of both increased fuel and water tanks.

CONSTITUTION: Fuel and water passing through both fuel and water tanks, which stick a radioactive alloy thin plate on their internal surface and laminate the said alloy wire net inside, are ionized with radiation and sucked inside a combustion chamber after being ionized. On the other hand, inside the combustion chamber sticking a radioelement alloy on an inner wall, suction and exhaust valves, a piston head, etc., a degree of ionization for these parts is further increased. And, since water that is not yet irradiated with the radiation is injected inside after being vaporized, its reaction takes place whereby C in the fuel and O in the water come to negative ion, not combined with each other so that COx will not be produced there, Also N in the air comes to the negative ion not combined with the O so that the NOx is not produced as well. In addition, O2 is totally combined with H2 and discharged as vapor, thus combustion efficiency is improved ever so better.