Crank-Angle Resolved Real-Time Engine Simulation –Integrated Simulation Tool Chain from Office to Testbed 2009-01-0589

The present work introduces a real-time capable crank-angle resolved engine model to test control strategies offline and online on Hardware-in-the-Loop environments. In order to follow a consistent modeling tool chain, the real-time model is derived from a detailed 1D cycle simulation and gas exchange model. Identical model parameters, applied in both approaches for the major engine components, cylinder and turbo-charger, help avoid time consuming re-parameterization and validation of isolated models used in different phases of the engine development process. Appropriate numerical schemes are applied to associate accuracy requirements with computational time constraints. The real-time model is validated by comparing cylinder traces with results gained from the 1D model for a turbo-charged diesel engine. The transient responses of both models are compared during vehicle driving conditions. All comparison simulations can be seen as an unalterable precondition to prove the reliability of the realtime model and its consistency with the 1D engine model.