| 摘要 |
A compression ignition internal combustion engine includes: a cylinder block and a cylinder head; a piston including a cavity that defines a combustion chamber in cooperation with the cylinder block and the cylinder head; and a nozzle for injecting fuel into the combustion chamber, wherein the cavity includes: a raised portion raised toward the nozzle; a bottom surface formed around the raised portion; and a first surface and a second surface that are continuous to the bottom surface, a depth of the first surface becomes shallower toward a radially outer side of the piston, the first surface and the second surface are provided at different positions in a circumferential direction about a central axis of the piston, a distance from the nozzle to the first surface is greater than a distance from the nozzle to the second surface, and the nozzle respectively injects first and second fuel sprays toward the first surface and the second surface, and injects a third fuel spray between the first and second fuel sprays. |
