Patent ID: 8196560

Claim:
An internal combustion engine of spark-ignition direct-injection type in which a fuel injection valve having a tip end part with a plurality of injection ports is configured to directly inject fuel into a combustion chamber in a cylinder, wherein the combustion chamber includes an upper surface defined by a ceiling wall formed in a cylinder head, and a lower surface defined by a top surface of a piston, two intake ports opened/closed by intake valves are formed in the ceiling wall for introducing intake air into the combustion chamber to provide intake flow flowing from an intake side toward an exhaust side in an upper part of the combustion chamber, the two intake ports are arranged adjacent to each other in a peripheral part of the ceiling wall, and the injection valves between the intake ports have tip ends facing the combustion chamber, a cavity is formed in a part of the top surface of the piston below a spark plug, and when a crank angle is 100 degrees after the top dead center in an intake stroke, a lower spray, which is a spray from a lower injection port injecting the fuel the most downward of the plurality of injection ports, collides with a part of the top surface of the piston which ranges on the intake side from an edge on an exhaust side of the cavity.