Engine Management Systems

Abstract

Engine models are now commonly used within the electronic control unit (ECU) to predict parameters that are not measured. The models may also be used for calculating the required actuator positions. These models and their use in the control structure are described. Strategies are explained for modeling and controlling the airflow, exhaust gas recirculation (EGR), variable geometry turbocharger (VGT) vane position, fuel injection, and spark advance. Model fidelity is discussed and a new individual cylinder engine model is introduced.