Apparatus and method for controlling air system of diesel engine

A method for controlling an air system of a diesel engine in a steady state, wherein the air system comprises an exhaust gas recirculation system and a turbocharging system, the method comprising:

• acquiring a parameter indicating an actual working condition of the diesel engine;
• computing a decoupling transfer function based on the parameter and a transfer function characterizing the diesel engine, wherein the transfer function is calibrated based on working condition data of the diesel engine in its steady working area;
• processing a parameter indicating a state of the air system;
• and
• generating a first driving signal for the exhaust gas recirculation system and a second driving signal for the turbocharging system based on the decoupling transfer function and a result of the processing.

A computer program product having a program of computer instructions included within a computer readable memory medium, such that when the program is executed by an apparatus, the apparatus is caused to:

• acquire a parameter indicating an actual working condition of the diesel engine;
• compute a decoupling transfer function based on the parameter and a transfer function characterizing the diesel engine, wherein the transfer function is calibrated based on working condition data of the diesel engine in its steady working area;
• process a parameter indicating a state of the air system;
• and
• generate a first driving signal for the exhaust gas recirculation system and a second driving signal for the turbocharging system based on the decoupling transfer function and a result of the processing.