CYLINDER INJECTION TYPE SPARK IGNITION INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a cylinder injection type spark ignition internal combustion engine capable of surely expanding a stratified combustion area to a high load side by assuring a reliable ignitability. SOLUTION: This cylinder injection type spark ignition internal combustion engine comprises an ignition plug, a cavity 802 formed in the top face of a piston, and a fuel injection nozzle 7 injecting fuel into the cavity in generally rather thin fan shape. The cavity comprises side walls deflected so that fuel can generally pass near the ignition plug. A plurality of deflection guiding projected parts 22 deflecting fuel in lateral direction are provided in the cavity.