FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: invention relates to internal combustion engines with nonuniform movement of working members in ring working chamber. Proposed rotary-vane engine has ring working chamber with intake and exhaust holes, end face covers, output shaft and vane rotors dividing chamber space into sectors insulated from each other, spark plug and periodically speed change mechanism. Periodically speed change mechanism is made in form of gear train with external and internal meshing and gear ratio equal to two. Wheel of gear train is rigidly coupled with vane rotor, and pinion is arranged from end face of engine, has fixed axle of rotation and is rigidly coupled with crank. Slider secured on crank axle-shaft slides along guide rigidly secured on shaft which has axis of rotation found between axle of pinion and axle-shaft of crank and mechanical coupling with drive shaft.
EFFECT: elimination of vibration, provision of stepless change of angular velocities of vane rotors and reliability of periodically speed change mechanism.
