Patent ID: 6325042
Filing Date: 2001-12-04
Classification: F02B,F02F,Y02T

Abstract:
In an internal combustion engine including an engine block having an end plane; a plurality of cylinders formed in the engine block and each having a cylinder axis; a piston disposed in each cylinder for reciprocating therein; a cylinder head positioned on the end plane of the cylinder block; each combustion chamber being bordered by a respective said piston and the cylinder head; each combustion chamber having a roof provided in the cylinder head and composed of first and second roof surfaces extending from the end plane at an inclination to the cylinder axis and meeting in a ridge line; two gas intake openings provided in said cylinder head and terminating in respective free edges on the first roof surface; at least one gas exhaust opening provided in said cylinder head and terminating in a free edge on the second roof surface; respective gas exchange valves seatable in the gas intake and gas exhaust openings; a fuel injection nozzle having an outlet opening and being supported in said cylinder head and having a nozzle axis oriented at an inclination to the end plane; and a spark plug supported in the cylinder head in a region of the roof;the improvement wherein the first roof surface has, in a region of the outlet opening of the fuel injection nozzle, a shoulder covering a terminal edge of the cylinders and extending into each combustion chamber; further wherein the shoulder has a front face extending transversely to the nozzle axis and is more steeply angled with respect to the first roof surface; and further wherein the free edge of the gas intake openings in the cylinders intersects the ridge line.