| 摘要 |
PROBLEM TO BE SOLVED: To inhibit a pulse noise by reducing a fuel pressure pulse in a fuel injection feeding by a non-synchronous injection in a returnless fuel feed system. SOLUTION: It is judged that a non-synchronous injection requirement exists when a variation amount of a throttle opening TA as a parameter for determining an operation state of internal combustion engine becomes a predetermined value or more. At this time, since a feed storage of fuel injection amount caused by an operation delay in addition to a fuel injection amount by a synchronous injection against respective cylinders of the internal combustion engine, a non- synchronous injection is subsequently carried out with a delay by a predetermined period every in the respective cylinders at the fuel injection timing when the two or more cylinders are not superposed against the synchronous injection. Thereby, a feed shortage of the fuel injection amount to the internal combustion engine is solved and a coping with a variation at the excess time in the operation state of the internal combustion engine can be carried out. A fuel pressure pulse width can be reduced within a range of a predetermined width and a pulse noise level at this time can be inhibited such that it becomes within a permission level.
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