The internal combustion engine has a piston rod (6), which is connected at both ends with respective piston-cylinder units (3,4,17,18). A coupling part (7) is arranged on the rotor (10) having a rotor or driving shaft (9). The conversion elements (8,22) ar...

The two-stroke combustion engine has a hollow piston that is movable in a cylinder (28). The inner space (4b) of piston serves as compressing space for air fuel mixture flowed into the cylinder during downward movement of piston. An outflow opening (21) fo...