Patent Document ID: 8401762
Application ID: 12917659
Patent Flag: 1

Claim One:
1. An engine control apparatus that controls operations of actuators to control combustion conditions in an engine, thereby controlling output characteristics of the engine, comprising: a combustion target value calculator that uses a combustion parameter arithmetic expression that defines correlations between engine output values indicating output characteristics of the engine and combustion parameters associated with combustion conditions of the engine to calculate target values of combustion parameters for bringing engine output values into agreement with required values; a controlled variable command value calculator that uses a controlled variable arithmetic expression defining correlations between a plurality of types of combustion parameters and a plurality of types of controlled variable for the actuators to calculate combinations of command values of the plurality of types of controlled variables for bringing the plurality of types of combustion parameters into agreement with target values; a combustion condition determiner that determines actual values of the plurality of combustion parameters; and a controlled variable arithmetic expression learning circuit that performs a learning operation to learn said controlled variable arithmetic expression based on the command values of the plurality of types of controlled variables, as calculated by said controlled variable command value calculator, and the values detected by said combustion condition determiner that are accumulated in a number of times required to obtain resolutions of said controlled variable arithmetic expression.