| 摘要 |
A fuel injection control apparatus includes a computing unit that calculates a pulse width for a pulse signal which drives the valve of a fuel injector, based on the operational state of the internal combustion engine and fuel pressure detected by a fuel pressure sensor. After a valve-opening command has turned on and a high valve-opening current has been supplied to open the fuel injector valve, a fuel injector driving signal waveform command unit discharges the current and supplies a small hold current Ih2 to maintain the injector's valve-open state. After the elapse of a predetermined rapid-discharge starting time from the turn-on of the valve-opening command, the fuel injector driving signal waveform command unit rapidly discharges the current until the hold current Ih2 has been reached.
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