FUEL INJECTION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a fuel injection control device capable of performing feedback control having high injection amount accuracy even if the target injection is extremely small.SOLUTION: A fuel injection control device includes: a storage means for storing a parameter for specifying an injection rate waveform as a learning value; a signal setting means for setting an instruction signal during a driving period for a fuel injection valve according to a target injection amount based on the learning value; a driving means for driving a fuel injection valve based on the instruction signal; a pressure waveform detection means for detecting a pressure wave form based on a fuel pressure detected by a fuel sensor when the fuel injection valve is driven; a non-injection determination means for determining whether the fuel injection valve is in a non-injection state when it is driven; a learning means for calculating a parameter corresponding to the target injection amount based on the pressure wave form on the condition that the fuel injection valve is determined to be not in the non-injection state and updates the learning value; and a correction means for correcting the instruction signal to extend a driving period until the fuel injection valve is determined to be not in the non-injection state when it is determined to being in the non-injection state.