Patent ID: 6435159
Filing Date: 2002-08-20
Classification: F02B,F02F,Y02T

Abstract:
A direct fuel injection internal combustion engine comprising:an engine block defining a cylinder having a longitudinal axis, an upper end, and a cross-sectional area in a plane perpendicular to said axis; a piston reciprocally moveable in said cylinder along said axis; and a cylinder head including a lower surface portion closing said upper end of said cylinder to define a combustion chamber between said piston upper surface and said cylinder head lower surface portion, said lower surface portion extending generally perpendicular to said axis and having therein an upwardly extending recess, said recess having a lower end and an upper end, said lower end of said recess having an area in a plane perpendicular to said axis, said area comprising a range from more than 20% to about 65% of the cross-sectional area of said cylinder.