| 摘要 |
PROBLEM TO BE SOLVED: To suck a fuel into a combustion chamber from a side far from a curvature center of a curved portion and a side close to the same with good balance, in a port-injection type internal combustion engine including an intake port provided with the curved portion between a fuel injection valve and an intake valve.SOLUTION: A fuel injection valve 21 injects first fuel spray FS1 directing to a wall surface 15a2 at a side close to a curvature center of a curved portion 15a, and second fuel spray FS2 directing to a side far from the curvature center of the curved portion 15a with respect to the first fuel spray FS1. A penetrating force of the first fuel spray FS1 is determined to be higher than that of the second fuel spray FS2. Thus the first fuel spray FS1 attaches to a wall surface 15a2 at the side close to the curvature center of the curved portion 15a, and vaporized fuel flows into a combustion chamber 13 to the side close to the curvature center of the curved portion 15a from the side close thereto. On the other hand, the second fuel spray FS2 flows into the combustion chamber 13 from the side far from the curvature center of the curved portion 15a accompanying intake air floating in an intake port 15 and flowing while deviating to the side far from the curvature center of the curved portion 15a. |
