Passive fault tolerant control strategy using adaptive sliding mode control. Application to diesel engine air path

The automotive industry faces actually new challenges, due to a more stringent exhaust emissions legislation. Pressure to lower emissions while maintaining or improving other engine performance parameters required, that the intake air properties be better controlled and matched at every engine operating conditions. In this paper we developed a robust sliding mode controller for the diesel engine air path. The proposed controller incorporates an adaptive switching gain which avoids knowing uncertainties bounds caused by model parametric variations or and external disturbances. Stability analysis of the closed loop scheme have been proved using the Lyapunov theory. The proposed controller has been tested on the Jankovic Tubocharged Diesel Engine (TDE) model air path simulations results demonstrates the robustness of the controller facing unmodelled dynamic and actuator fault leakage.