Patent ID: 6840210

Claim:
A direct cylinder injection-type spark ignition internal combustion engine comprising a spark plug, a cavity formed in the top surface of a piston, and a fuel injection valve for injecting fuel in nearly the shape of a fan having a relatively small thickness so that the fuel collides with a bottom wall of said cavity at an acute angle, wherein, when the fuel injected in nearly the shape of a fan from said fuel injection valve is considered by being divided into a plurality of fuel segments in a radial direction, the bottom wall of said cavity has a plurality of neighboring fuel leading passages for leading said plurality of fuel segments collided toward the side wall of said cavity, the side wall of said cavity has a first fuel deflection passage and a second fuel deflection passage for so deflecting at least two of said plurality of fuel segments led by said plurality of fuel leading passages as to pass near said spark plug, and the depth near the side wall of said cavity in a first fuel leading passage among said plurality of fuel leading passages for leading the fuel segment to said first deflection passage, is smaller than the depth near the side wall of said cavity in a second fuel leading passage among said plurality of fuel leading passage among said plurality of fuel leading passages for leading said fuel segment to said second fuel deflection passage.