Patent ID: 6431157
Filing Date: 2002-08-13
Classification: F01M,F02M,Y02T

Abstract:
An internal combustion engine comprising:a cylinder block having at least one cylinder barrel, a piston moveable in the cylinder barrel, wherein the piston is further comprised of at least two peripheral grooves situated at a distance from each other, each having a piston ring, and a piston collection chamber contained between the rings, a combustion chamber situated above the piston, a cylinder head having at least one inlet channel and exhaust channel with related inlet and exhaust valves to the combustion chamber, a crank case for lubricating oil situated below the piston, an expansion chamber in the engine, at least one evacuation port for connecting the expansion chamber to at least one cylinder barrel, the port opening out into the cylinder barrel, an evacuation channel opening out into at least one inlet channel or inlet manifold, wherein the expansion chamber forms a communicating connection between the cylinder barrel and the inlet channel via the evacuation port and evacuation channel, and wherein the piston holds the evacuation port open in order to maintain the connection between the crank case and the inlet channel during the piston's movement from its top dead center to a position at a predetermined distance from the top dead center and thereafter breaks the connection of the evacuation port with the crank case during its continued movement down to bottom dead center, and wherein the collection chamber is connected to the evacuation port when the piston is near the bottom dead center.