| 主权项 |
1. A compression ignition internal combustion engine comprising:
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; anda 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, 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, the nozzle injects a fourth fuel spray sandwiching the first fuel spray in cooperation with the third fuel spray, and when the piston is viewed in the central axis direction, a distance to the nozzle from a point where an outer circumferential edge of the first surface intersects a direction of the third fuel spray is greater than a distance to the nozzle from a point where the outer circumferential edge of the first surface intersects a direction of the fourth fuel spray. |
