ROTARY ENGINE

PURPOSE:To improve mechanical efficiency and to make it possible to adjust the value of an output torque by generating the torque due to combustion of supplied fuel and air from an intake port after closing the port, when a space enclosed with vanes and a projected part of a rotating wave piston is small. CONSTITUTION:When a piston part 5a rotates to the arrow direction, combustion gas in a combustion chamber 6 is exhausted through an exhaust port 13b and simultaneously an intake process begins on the left side of the piston part 5a and the compressed air stored in an air tank 27 is forced to be supplied into the combustion chamber 6a through an intake port 14a. Nextly when the wave piston 5 rotates 15degree, the intake port 14 closes and simultaneously fuel is injected from an injection nozzle 32 and an explosion process begins. This explosion process continues until about 62.5degree rotation and further an exhaust process of the combustion gas takes place up to 45degree rotation. At the 62.5degree rotation the volume of the combustion chamber 6a becomes maximum, hereafter a piston part 5d invades into the combustion chamber 6a, and the exhaust process takes place. Besides overlapping with the exhaust process, the intake process and the explosion process take place.