Fuel injection control device for internal combustion engine

A fuel injection control device that is applied to an internal combustion engine including a fuel injection valve and causes a valve body to be in a valve open state accompanying an energization of the fuel injection valve to inject fuel, and

• an injection amount parameter indicating an injection amount in response to an energization command signal in the fuel injection valve and a dynamic parameter indicating characteristics of a valve opening operation and a valve closing operation of the valve body accompanying a start of the energization and an end of the energization in response to the energization command signal being defined as parameters indicating an injection amount characteristic of the fuel injection valve, the fuel injection control device comprising:
• a first acquisition unit configured to acquire the dynamic parameter when the fuel injection valve injects the fuel;
• a second acquisition unit configured to acquire the injection amount parameter when the fuel injection valve injects the fuel;
• a first calculation unit configured to calculate, based on the dynamic parameter, a dynamic correction value that compensates for a deviation in an operation characteristic of the valve body;
• a second calculation unit configured to calculate, based on the injection amount parameter, an injection amount correction value that compensates for a deviation in the injection amount in response to the energization command signal;
• and
• a correction unit configured to correct a fuel injection using the dynamic correction value calculated by the first calculation unit and the injection amount correction value calculated by the second calculation unit, wherein
• the second calculation unit calculates the injection amount correction value on condition that the correction unit corrects the fuel injection using the dynamic correction value.