| 主权项 |
1. An internal combustion engine comprising:
a fuel injection valve that injects fuel to a combustion chamber in which a swirl flow is generated; a piston including a cavity exposed to the combustion chamber; and a cylinder head including a central portion serving as a portion defining the combustion chamber, wherein an injection direction, of any injection hole of injection holes provided in the fuel injection valve injecting fuel to a region of the combustion chamber through which the swirl flow flows upward while rotating, is set inclined downward with respect to a reference direction, an injection direction, of any injection hole of injection holes provided in the fuel injection valve injecting fuel to a region of the combustion chamber through which the swirl flow flows downward while rotating, is set inclined upward with respect to the reference direction, the cavity includes a cavity bottom wall surface having such a shape as to change its height in a direction of a swirl flow, the central portion includes a head bottom wall surface having such a shape as to change its height in the direction of the swirl flow, the reference direction is set such that a central axis of the injection hole is positioned in a center between the head bottom wall surface and the cavity bottom wall surface in a case where the swirl flow is not generated. |
