Control device for internal combustion engine

An electronic controller of an internal combustion engine that is provided with a plurality of fuel injection valves configured to respectively supply fuel to a plurality of cylinders, wherein the electronic controller is configured to:

• determine respective drive pulse widths for a plurality of drive pulse signals configured to respectively drive the plurality of fuel injection valves for injecting the fuel according to a driving state of the internal combustion engine;
• determine valve-opening response delay times and valve-closing response delay times with respect to the drive pulse signals, and determine respective differences between the valve-opening response delay times and the valve-closing response delay times;
• select a reference fuel injection valve from among the plurality of fuel injection valves based on the valve-opening response delay times and the valve-closing response delay times calculated for the fuel injection valves;
• determine the drive pulse width for the drive pulse signal for the reference fuel injection valve based on the difference between the valve-opening response delay time and the valve-closing response delay time corresponding to the reference fuel injection valve;
• determine the respective drive pulse widths for the drive pulse signals for the other fuel injection valves of the plurality of fuel injection valves based on (i) the difference between the valve-opening response delay time and the valve-closing response delay time corresponding to the reference fuel injection valve, and (ii) the respective other differences between the valve-opening response delay times and the valve-closing response delay times;
• and
• transmit at least one of the drive pulse signals having a respective one of the determined drive pulse widths to a valve control circuit.