Patent ID: 8245686

Claim:
A non-crankshaft engine comprising a body ( 6 ), a cylinder head ( 5 ) mounted on a top of the body, and a cylinder ( 7 ) formed inside the body, a piston ( 1 ) received in the cylinder ( 7 ) and connected with one end of the connecting rod ( 2 ), the improvements comprising a basic shaft ( 4 ) arranged in middle of the chassis ( 9 ) where the body is set, and perpendicularly intersecting a crossbar ( 3 ) by means of a fixed joint or a swing joint, the crossbar ( 3 ) being installed, symmetrically on either side of the axis of the basic shaft ( 4 ), with a fixing set ( 8 ), which connects with the other end of the connecting rod ( 2 ) through a swing joint, wherein when the piston ( 1 ) is at one stop point of the cylinder head ( 5 ), a center line of the cylinder head ( 7 ) intersects a perpendicular of a center line of the crossbar ( 3 ) at an angle φ, where φ is equal to or greater than 0° but smaller than 30° (0°≦φ<30°); a center line of the connecting rod ( 2 ) intersects the center line of the cylinder ( 7 ) at an angle β 0 where β 0 is equal to or greater than 0° but smaller than 15° (0°≦β 0 <15°).