Diesel A-M (A-Modular) Model Proposed: Expanding the Diesel A model for advanced turbocharging capabilities

The Diesel A model has been developed with the idea of looking at overall engine cycle performance in a larger system. As such, the goal has always been to provide an acceptable prediction of the engine performance without sacrificing the computational performance of the model. The simplest form of the Diesel A model has only a single integrator that is used to estimate the charge pressure based on the available heat at the end of the closed cylinder process. This method has recently been improved by adding a more realistic estimation for the charge pressure through the Buchi equation. This has proved
to be an improvement but has also created a new problem: the need for a second integrator to close an algebraic loop in the model. This second integrator represents the time delay of the outlet receiver building up pressure but it has no direct physical derivation. Furthermore this method is still not suitable for advanced turbocharging strategies, and thus an improvement is proposed in this report.