Patent ID: 6418905
Filing Date: 2002-07-16
Classification: F02B,F02F,Y02T

Abstract:
An internal combustion engine with controlled ignition and direct injection,of the type in which a cylinder is bounded axially at the top by a lower face of a cylinder head, into which there open, each via a corresponding valve, at least one intake duct and at least one exhaust duct, the intake valves and exhaust valves being provided respectively on opposite sides of a reference plane containing the axis of the cylinder and bounding an intake side and an exhaust side of the cylinder, characterized in that at least one of the intake ducts is adapted to create in the cylinder, at least during certain stages of operation of the engine, a tumble flow in which the gases contained in the cylinder are caused to move rotationally around an axis perpendicular to the cylinder axis and parallel to the reference plane, and in that a fuel injector is located in such a manner that it enters the lower face of the cylinder head such that the fuel jet tends to be intercepted by the portion of the flow circulating in the sense opposite to that of the jet and directed toward a spark plug, and characterized in that the cylinder is axially bounded at the bottom by a piston, an upper face of which is provided with a cavity which is disposed eccentrically relative to a first side of the reference plane, and in that the injector is located on the opposite side to inject the fuel toward the cavity.