Patent ID: 6598583
Filing Date: 2003-07-29
Classification: F02B,Y02T

Abstract:
A gasoline direct injection engine, comprising:a cylinder block defining a cylinder; a piston slidably received in said cylinder and having a top surface defining a reference surface, said top surface including a recess recessed from said reference surface, a raised surface raised from said reference surface formed around said recess, and a sloping surface extending between said raised surface and said reference surface; a cylinder head attached to an end of said cylinder block to define a combustion chamber in said cylinder in cooperation with said piston, said combustion chamber defining a roof surface opposing said sloping surface; a fuel injection valve having a nozzle communicating with said combustion chamber; and a spark plug having an electrode facing said recess; wherein a first angle formed between said sloping surface and a plane perpendicular to a cylinder axial line is less than a second angle formed between said roof surface and said plane so as to define a progressively widening gap between said roof surface and said sloping surface toward said recess.