Patent ID: 6314937
Filing Date: 2001-11-13
Classification: F02B,F02F,Y02T

Abstract:
An internal combustion engine comprising:a cylinder having a first diameter about an axis;a cylinder head sealingly connected across a top of the cylinder;a combustion chamber formed in the cylinder head proximate the top of the cylinder, the combustion chamber having a second diameter about the axis that is greater than the first diameter;a piston disposed for reciprocating motion in the cylinder, the piston having a top wall comprising a convex surface whereby a center portion of the top wall projects closer to the combustion chamber than does an edge portion of the top wall to form a generally ring shaped combustion volume when the piston approaches a top dead center position;an intake valve disposed in the cylinder head and opening into the combustion chamber;an exhaust valve disposed in the cylinder head and opening into the combustion chamber;a fuel injection nozzle disposed in the cylinder head proximate the axis.