Engine control system with algorithm for actuator control

An engine control apparatus comprising:

• a target performance parameter determining circuit which determines a target value of each of a plurality of performance parameters associated with different types of performances of a combustion engine based on operating conditions of the combustion engine;
• a target combustion parameter determining circuit which determines target values of a plurality of combustion parameters associated with combustion states of fuel in the combustion engine based on the target values of the performance parameters using first correlation data representing correlations between the performance parameters and the combustion parameters;
• and
• a control command calculator which calculates 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,
• wherein when actual values of the performance parameters are in coincidence with the target values, as determined by the target performance parameter determining circuit, the target performance parameter determining circuit serves as a target operating circuit which selects at least one of the performance parameters as a target to be operated and operates the target value of the selected one of the performance parameters so as to enhance the level of a corresponding one of the performances of the engine based on non-targets that are others of the performance parameters.