Piston-type internal combustion engine

Claim 1

A piston-type internal combustion engine comprising at least one cylinder head, an inlet valve plate and at least one outlet valve in said cylinder head, a disc shaped partial combustion chamber disposed in said cylinder head, at least one piston having an annular body and further including a substantially flat bottom surface and when positioned at top dead center forms one surface which substantially encloses said disc-shaped partial combustion chamber disposed in said cylinder head, this partial combustion chamber having the predominant volumetric component of the final compression volume, said combustion chamber being closable by said inlet valve plate, an intake conduit arranged for communication with said combustion chamber when said intake valve plate is opened, a fuel injection nozzle directed toward said inlet valve plate and disposed so that fuel is injected virtually freely into said combustion chamber when said intake valve plate is opened and the injection duration of said fuel is interrupted immediately prior to closure of said inlet valve, characterized in that a gas guidance conduit is provided between said surface of said piston and said cylinder head, said guidance conduit further having a cross-section which gradually varies from a zone which is substantially flat beginning in the region of said outlet valve and extends approximately in the form of a semicircle in a direction parallel to said surface of said piston to thereby create the formation of a compact gas stream for entry into said partial combustion chamber.