INTERNAL COMBUSTION ENGINE

摘要

There is provided an internal combustion engine, provided with a crankshaft and one or several cylinders provided on the wall thereof with exhaust ports and closed at the top by a cylinder head provided with intake ports; each cylinder accommodating an engine piston connected to the crankshaft and a coaxial auxiliary piston opposite the engine piston, defining an intake chamber and a combustion chamber; said auxiliary piston axially determining on the side of the combustion chamber a housing that communicates with the intake chamber via transfer ports, the housing of which includes a secondary piston which opens and closes the transfer ports in a back-and-forth movement between a rear position and a forward position.

主权项

1. An internal combustion engine, comprising a crankshaft and one or several cylinders, each cylinder comprising an engine piston joined to the crankshaft and that may perform a reciprocating motion inside the cylinder; a cylinder head that closes the upper portion of the cylinder comprising intake ports; exhaust ports located on the wall of the cylinder; and a coaxial auxiliary piston opposite the engine piston, delimiting a combustion chamber between said auxiliary piston, the cylinder and the engine piston, and an intake chamber between said auxiliary piston, the cylinder and the cylinder head, said auxiliary piston being provided with a reciprocating motion mechanically synchronised with the engine piston in order to cause the expulsion of residual gases from the combustion chamber through the exhaust port and simultaneously cause the intake of a fresh load of fuel/air mix in the intake chamber through the intake ports; wherein the auxiliary piston axially determines on the side of the combustion chamber a housing that communicates with the intake chamber through transfer ports, a secondary piston being included in said housing which opens and closes the transfer ports in a back-and-forth movement, respectively between an upward rear position and a downward forward position.