Four-stroke rotary- piston engine with adjustable compression ratio and adjustable valve control times

A four-stroke rotary-piston engine comprising:

• an outer disk;
• an inner disk;
• at least one cylinder;
• at least one piston;
• at least one piston rod, said outer disk surrounding said inner disk such that said outer disk and said inner disk are in a common plane, wherein said inner disk is rotatable with respect to said outer disk by a compression control device that is adapted to adjust compression;
• a fixed gear engaged with a planet gear, said fixed gear and said planet gear arranged below said outer disk and said inner disk, said planet gear rotating a crank situated on a shaft thereof, the shaft passing upwardly through said inner disk, a length of the crank being equal to a radius of the planet gear, wherein the planet gear is rotatably mounted on said inner disk, wherein the crank reciprocates a lever via said at least one piston rod, the lever having one end pivoted on said outer disk so as to push said at least one piston into and out of said at least one cylinder affixed to said outer disk by a bar pivotally mounted on another end of the lever;
• and
• a rotary gate valve positioned at a head of said at least one cylinder.