| 摘要 |
PROBLEM TO BE SOLVED: To improve engine exhaust gas capacity or the like by determining the output timing of a injection command signal to an injector so as to make fuel injection timing accord with the basic target injection timing even if there are variations in the fuel injection timing of each injector. SOLUTION: A filter processing of detected common rail pressure waveform is carried out whereby pressure data are secured and simultaneously, an approximate stright line Ld is calculated with the pressure data of up to a time point T3 taking the first minimum since a pressure drop has started from the specified time point, and with the largest time point in a difference between the approximate stright line Ld and the pressure data, it is regarded as the pressure dropping start timing T2 of the common rail pressure. On the basis of this time point T2, a time delayΔTd of up to the actual fuel injection timing T1 is calculated from output timing T0 of an injection command signal to an injector. In this constitution, the output timing T0 of the injection command signal is determined as a time point gone back as far as the time of the time delayΔTd from a basic target injection timing Td to be sought from a driving state.
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