Patent ID: 6494178
Filing Date: 2002-12-17
Classification: F02B,F02F,Y02T

Abstract:
A combustion chamber for an internal combustion engine comprising:a cylinder head having an inlet port and an exhaust port formed therein with valve members disposed in the ports for controlling the flow of air and products of combustion to and from the combustion chamber, an ignition source, and a fuel injection device; a cylinder positioned to receive air and fuel injected directly from the fuel injection device; a piston mounted for reciprocation in the cylinder, said piston including a bowl into which the fuel is injected, the bowl having a floor, a rim surface, a transporting surface and side surfaces joined with the transporting surface; said transporting surface including an arcuate surface tangential with the floor and a linear edge spaced a predetermined distance from a centerline of said ignition source, and said transporting surface at the linear edge being disposed at a negative draft angle in the range of zero degrees to minus twenty degrees relative to an axis of the cylinder bore; and a generally flat peripheral surface extending around the piston from said rim surface, said rim surface being displaced above the floor by a distance in the range of three to eight millimeters.