Patent ID: 6659075
Filing Date: 2003-12-09
Classification: F02B,F02F,Y02T

Abstract:
A direct injection engine comprising:a cylinder head having a conically-shaped face, an ignition plug arranged on the top of a combustion chamber, positioned at an apex point of the conically-shaped face, and installed at a substantial center of the cylinder head, a fuel injector located on a side of said combustion chamber and installed in a vicinity of an intersection point between the cylinder head and a cylinder block, and an intake air control means installed on an intake manifold, wherein said intake air control means generates a tumble air flow rising from the bottom of said fuel injector to said ignition plug in said combustion chamber, wherein said fuel injector is configured to inject fuel spray from the intake side in said combustion chamber to the exhaust side, thereby supplying said fuel spray between said ignition plug and said tumble air flow, wherein, with respect to a line which passes through an injection point of the fuel injector and intersects at a substantially right angle with a center line of a cylinder, the fuel injector is installed so as to be inclined along a central axial line of the fuel injector toward the piston side, and wherein, when the fuel spray injected from the fuel injector is sectionally crossed with a plane which includes a spark point of the ignition plug and the injection point of the fuel injector, the ignition plug is positioned between the line which passes through the injection point and the face of the cylinder head.