Engine control system for actuator control

An engine control apparatus comprising:

• a first storage which stores first correlation data representing correlations between a plurality of performance parameters associated with different types of performances of a combustion engine and uncorrelated common factors existing among the performance parameters;
• a second storage which stores second correlation data representing correlations between the common factors and a plurality of combustion parameters associated with combustion states of fuel in the combustion engine;
• a target common factor determining circuit which determines target values of the common factors based on target values of the performance parameters using the first correlation data stored in the first storage;
• a target combustion parameter determining circuit which determines target values of the combustion parameters using the second correlation data stored in the second storage based on the target values of the common factors, as derived by the target common factor determining circuit;
• and
• a control command determining circuit which determines command values as a function of the target values of the combustion parameters, as determined by the target combustion parameter determining circuit, the command values being provided to actuators which work to control the combustion states of the fuel in the combustion engine for achieving desired levels of the performances of the combustion engine, the command values representing controlled parameters associated with operations of the actuators.