| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine control device which can further surely suppress the covercooling and overheating of a piston by a simple constitution.SOLUTION: An engine control device controls oil supply means 136 so that the pressure of oil supplied to each oil jet device 50 reaches first pressure P1 at a full-cylinder operation, and controls the oil supply means 136 so that the pressure of the oil supplied to each oil jet device 50 reaches second pressure P2 which is lower than the first pressure P1 at reduced-cylinder operation. The engine control device raises the injection start pressure Ps_X of the oil jet device 50_Y arranged at a cylinder which is brought into an idle state higher than the second pressure P2, lowers it lower than the first pressure P1, and lowers the injection start pressure of the oil jet device 50_Y arranged at a cylinder which is constantly operated lower than the second pressure P2 at least at the reduced-cylinder operation. |
