Engine control device, engine control system, and engine control program

An engine control program configured to cause an engine device which is a computer to execute:

• an injection command step of outputting a fuel injection amount command value supplied to an engine;
• a first calculation step of outputting, as a basic fuel injection amount acquired in the injection command step, a fuel injection amount obtained by feedback calculation based on an engine speed deviation which is a deviation between an actual engine speed and a target engine speed of the engine;
• a second calculation step of outputting, as a feedforward fuel injection amount acquired in the injection command step, a fuel injection amount obtained by feedforward calculation based on an engine load at present of the engine;
• and
• a first determination step of determining whether a load application state has occurred in which the engine load before a prescribed time, which is not greater than a prescribed value, increases by not less than a variation threshold,
• wherein the engine control program causes the engine device to switch from a normal control mode where a first fuel injection amount calculated based on the basic fuel injection amount is output as the fuel injection amount command value in the injection command step to a load application control mode where a second fuel injection amount calculated based on a value obtained by adding the feedforward fuel injection amount to the basic fuel injection amount is output as the fuel injection amount command value in the injection command step, if the first determination step determines that the load application state has occurred.