| 摘要 |
PROBLEM TO BE SOLVED: To achieve high combustion performance by suppressing deviation of an orientation direction of fuel spray by being affected by a gas flow velocity in an intake port.SOLUTION: An area ratio AR indicating a deviation degree of fuel spray to an intake valve is determined on the basis of a gas flow velocity (S101) and an injection pulse width (S102). In a case when conditions that the area ratio AR is lower than a set value SL, and the fuel spray is introduced into a combustion chamber through the intake valve while being deviated, a requested penetrating force is set to make the area ratio AR to become the set value SL or more (S103→S104). Here, when it is necessary to decrease the penetrating force to satisfy the requested penetrating force, the penetrating force of the fuel spray is decreased by split injection, lowering of fuel pressure, switching to a fuel injection valve of lower penetrating force, and the like (S105→S106). On the other hand, when it is necessary to increase the penetrating force of the fuel spray, the penetrating force of the fuel spray is increased by increasing the fuel pressure, switching to a fuel injection valve of higher penetrating force, and the like (S105→S107). |
