HEAT ENGINE AND POWER GENERATION SYSTEM USING THE HEAT ENGINE

The present invention has a problem aiming to provide a heat engine that emits neither carbon dioxide nor nitrogen oxide and is capable of achieving a simplified structure, and another problem aiming to provide a power generation system using the heat engine. To solve the problems, a heat engine according to the present invention is an internal combustion engine 1a (1b) including a fuel inlet for introducing oxyhydrogen gas (or a mixture with an existing fuel) into a combustion chamber, a spark plug for igniting the oxyhydrogen gas (the mixture) in the combustion chamber at a predetermined time, a piston that moves in accordance with a pressure change in the combustion chamber before and after ignition, and a motion conversion mechanism to change the motion of the piston to rotational motion of an output shaft 7.