Fault Tolerant Oxygen Control of a Diesel Engine Air System

This paper is devoted to the fault tolerant control problem of a Diesel engine air system having a jammed Exhaust Gas Recirculation (EGR) valve. The fault tolerant control is based on replaning the trajectory in order to track a new controlled variable which is the oxygen concentration in the intake manifold instead of the fresh air mass flow. The trajectory planning is based on an inverse model approach, utilizing the fundamental thermodynamic relations of the air system.