Patent ID: 8474431

Claim:
A direct fuel-injection engine comprising a piston ( 13 ) having a top face with a height that varies in the circumferential direction, a cavity ( 25 ) recessed in a central part of the piston ( 13 ), and a fuel injector ( 23 ) for injecting fuel along a plurality of fuel injection axes (Li 1 , Li 2 ) oriented in a plurality of directions spaced in the circumferential direction within the cavity ( 25 ), characterized in that the magnitude of squish flow changes in the circumferential direction, and a second collision angle (α 2 ) at which a second fuel injection axis (Li 2 ), oriented in a direction in which the squish flow is large, collides with the cavity ( 25 ) is set larger than a first collision angle (α 1 ) at which a first fuel injection axis (Li 1 ), oriented in a direction in which the squish flow is small, collides with the cavity ( 25 ).