Patent ID: 6672276
Filing Date: 2004-01-06
Classification: F02B,F02F,Y02T

Abstract:
A direct fuel injection engine comprising:a combustion chamber having a piston movably mounted therein, the piston including an upper wall having a cavity with a fuel stream directing surface; a spark plug having a spark discharge gap arranged to ignite a fuel-air mixture in the combustion chamber; and a fuel injection valve including a front edge portion with a plurality of injection vents arranged and configured to directly inject fuel into the combustion chamber against the fuel stream directing surface as plurality of solid-core fuel streams that strike at non-perpendicular angles, the fuel stream directing surface being at least partially curved to direct movement of the fuel streams after striking the fuel stream directing surface toward the fuel injection valve, and the fuel stream directing surface being partially elliptical in a top plan view with its focal points being located at the front edge portion of the fuel injection valve and at the spark discharge gap of the spark plug as its focal points.