IMPROVEMENT TO A TWO-STROKE ENGINE WITH V ALV E EFFECT

摘要

An improvement to a two-stroke engine with valve effect wherein the cylinder (10) is shifted forward with respect to the direction of rotation of the crankshaft (60) such that, in the expansion phase, the connecting rod (50) reduces the angle of action on the crankshaft (60), minimizing friction of the piston (40) against the cylinder (10) and increasing the “useful angle of rotation of the crankshaft (60)” with respect to the same stroke of the piston (40), sealing efficiently the exhaust port (11), preventing loss of gases, improving pre-compression, and reducing a compression leak.

主权项

1. Improvement to a two-stroke engine with valve effect comprising a cylinder (10) having an exhaust port (11) and an air-fuel mixture intake port (12) wherein said cylinder (10) having a piston (40) works as a slide valve, wherein the upper region of the cylinder (10) limited below by the piston (40) is a combustion chamber (20) and the lower region limited above by the piston (40) is a crankcase (30), which communicates with the cylinder (10) through a transfer channel (13), wherein said piston (40) is attached below to a connecting rod (50) which is attached to floating bearings of the crank of the crankshaft (60), wherein said cylinder (10) is shifted forward with respect to the direction of rotation of the crankshaft (60) with cylinder clearance with respect to the center of the crankshaft (60) equal to the radius of the crankshaft, the connecting rod (50) being disposed vertically tilted, moving jointly with the piston (40) which is forced against the wall of the front portion of the cylinder (10) with bottom dead center shifted in the horizontal plane from top dead center with respect to the piston movement line.