Fuel injection control unit

A fuel injection control unit applied to a fuel injection valve that injects a fuel used for combustion of an internal combustion engine by opening a valve body due to an electromagnetic attraction force generated by energization of a coil, the fuel injection control unit comprising:

• a controller that controls the energization of the coil according to an energization time of the coil corresponding to a required value of an injection amount injected during opening of the valve body one time;
• an injection amount detector that detects a physical quantity having a correlation with the injection amount when implementing a partial lift injection where valve closing operation is started after the valve body starts valve opening operation and before the valve body reaches a maximum valve open position;
• and
• a correction unit that, when the partial lift injection is implemented, corrects the energization time on the basis of a detection value that was previously detected by the injection amount detector, wherein
• a small amount region is defined as a range of the energization time for which the partial lift injection is implemented and which is longer than a predetermined time, and an extremely small amount region is defined as a range of the energization time for which the partial lift injection is implemented and which is shorter than the predetermined time,
• the energization time in the small amount region is allowed to be corrected on the basis of the detection value in the small amount region, and
• the energization time in the extremely small amount region is prohibited from being corrected on the basis of the detection value in the small amount region.