2013 Volume 6 Issue 5 Pages 309-315
The air-fuel ratio is a key performance of engines. In multi-cylinder internal-combustion (IC) engines, imbalance in fuel paths between cylinders exists, which demands for modifying fuel injection of individual cylinders. This paper applies the model predictive control strategy to air-fuel ratio control through modifying the fuel injection command for individual cylinders. The control scale is with BDC (Bottom Dead Center) scale where BDC is the event that the piston reaches the bottom dead center. Experimental results show that the air-fuel ratio can be controlled to the objective value even when unknown disturbance on fuel injectors exists.