Internal combustion engine

Abstract

The internal combustion engine 10 comprises: a combustion chamber CC surrounded by a cylinder bore wall 21, a piston crown part 31, and a cylinder head wall 41; a spark plug 80 arranged at the cylinder head wall and having a spark generating part 81; and a partitioning wall part 90 partitioning the combustion chamber into a main combustion chamber CM at which the piston crown part is exposed and an ignition chamber CI at which the spark generating part is exposed, the partitioning wall part being formed with a plurality of through holes 91-96 connecting the main combustion chamber and the ignition chamber. The axes 91Y-96Y of the plurality of through holes are formed so that at predetermined regions 90x from ignition chamber side opening parts 91a-96a of the plurality of through holes, the directions toward the ignition chamber side opening parts all are substantially the same.

Dependencies are inferred from the claim text.