Direct cylinder injection-type spark ignition internal combustion engine
A direct cylinder injection-type spark ignition internal combustion engine comprising a spark plug (6), a cavity (8') formed in the top surface of a piston (5'), and a fuel injection valve (7) 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 (8') at an acute angle, wherein, when the fuel injected in nearly the shape of a fan from said fuel injection valve (7) is considered by being divided into a plurality of fuel segments in a radial direction, the bottom wall of said cavity (8') has a plurality of neighboring fuel leading passages (81a, 81b, 81c) for leading said plurality of fuel segments collided toward the side wall (82') of said cavity (8), the side wall (82') of said cavity (8) 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 (6), and the angle of collision of the fuel in a first fuel leading passage among said plurality of fuel leading passages for leading said fuel segment to said first fuel deflection passage, is smaller than the angle of collision of the fuel in a second fuel leading passage among said plurality of fuel leading passages for leading said fuel segment to said second fuel passage deflection passage.