Rotary piston engine

The rotary piston engine (10) has a control mechanism (40,58) whereby each piston while rotating executes a linear movement to periodically increase and decrease the chamber (86,98) allocated to the respective piston. The linear movement of a piston (22) is carried out parallel to the longitudinal center axis (20) of the engine casing, and the piston with regard to this axis is installed eccentrically. At least one additional rotating piston (24-28) is installed on the side opposite the first with regard to the longitudinal center axis of the casing.