CYLINDER FUEL INJECTION VALVE AND INTERNAL COMBUSTION ENGINE INCLUDING IT

摘要

PROBLEM TO BE SOLVED: To form flat and deflecting spray for converging the air-fuel mixture with a combustible concentration in a piston cavity, thickening the air-fuel mixture with a combustible concentration on the side of a spark plug and improving combustibility by thinning the air-fuel mixture flowing toward the piston for spray characteristics of an electromagnetic fuel injection valve for a direct injection gasoline engine. SOLUTION: A part of wall forming an injection hole at the outlet of the hole is formed of a V-groove including two surfaces slanting at an arbitrary angle in relation to the center axis of the injection hole or of a rectangle groove stepped with different depths of cut.