PROBLEM TO BE SOLVED: To solve a problem that existing gasoline engines, diesel engines and rotary engines are improved in utilizing a volume with no basic investigation and an output is accidentally generated, an output at the same amount of fuel is slight and about an output of a fuel cell and discharges an enormous amount of CO 2 to accelerate the global warming. SOLUTION: A recovery amount of heat is made to the maximum by approaching to complete combustion completion in a sealed container by NOx reduction separation long time cooling combustion in a diameter-shrunk main combustion chamber heat exchanger. An exhaust temperature of approximately existing 500°C is made to approximately 50°C while including a waste heat recovery heat exchanger. A recovery heating value at 400°C is indefinitely increased every rotation and a vaporized film is provided at a gap with water by raising an ultra-critical pressure high temperature overheating vapor large amount maximum combustion pressure and direct driving an ultra-critical pressure high temperature water injection electro-magnetic heating diameter-shrunk piston. Output is generated at the minimum loss of friction. Output at 90° after dead point is made to 40 times reduction of the existed gasoline engine, i.e., 20 MPa ×100 times mass × 1/8 moment = 500 times idea output of the same fuel amount existing gasoline engine. Exhaust of CO 2 or the like is made 0. COPYRIGHT: (C)2003,JPO