To generate good homogeneous fuel/air mixture without diluting engine oil, in a cylinder injection type spark ignition internal combustion engine for performing homogeneous combustion.
The cylinder injection type spark ignition internal combustion engine injects fuel with a fuel injection valve 2 arranged around the upper part of the cylinder to generate the homogeneous fuel/air mixture. The fuel injection valve injects fan-like fuel spray spreading mainly in the width direction W into the whole cylinder of last half of an intake process so that the center plane in the thickness direction of the fan-like fuel spray is substantially parallel with the center axis C of the cylinder, and a penetration force in the upper part of the fan-like fuel spray is weakened compared with the lower part of the fan-like fuel spray.
COPYRIGHT: (C)2005,JPO&NCIPI
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Jun Tsuruta
Tetsuro Shimada
Masaya Nishiyama
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