| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device of an cylinder injection engine, capable of controlling a fuel injection amount with high precision, by controlling fuel injection finishing time, without making fuel pressure high. SOLUTION: This fuel injection control device comprises a crank angle sensor 16 for detecting an rotation angle of an internal combustion engine 1; a fuel injection valve 4 for directly injecting a fuel into a fuel chamber in the internal combustion engine 1; a fuel pump 19 for supplying the fuel to the fuel injection valve 4, a supply pressure of the fuel being set to the maximum cylinder pressure or less during motoring of the internal combustion engine 1; control means 22 which control opening time and closing time of the fuel injection valve 4 depending on an operating condition of the internal combustion engine 1 to control a fuel injection amount and fuel injection time, and judge opening and closing time of an intake valve 9 of the internal combustion engine 1 from the rotation angle of the crank angle sensor 16 to close the fuel injection valve 4 not later than the closing time of the intake valve 9, thereby controlling the fuel injection time. |
