Volkswagen Ag

Thorsten Rebohl

Jens Jeschke

Axel Groenendijk

Hans-Georg Nitzke

Oliver Cassebaum

Johannes Westendorf

An engine management system uses physically based models to determine the composition and mass of the fresh air/exhaust gas mixture suctioned by an internal combustion engine. The models are closely coupled to each other in a partial manner and are used to simulate the filling of the combustion chamber with the suctioned fresh air/waste gas mixture in order to simulate the flow of the mass of re-circulating exhaust gas, the behavior of the exhaust gas manifold upstream and downstream from a turbine, the storage behavior of the intake manifold, and the behavior of the intake pipe or inlet manifold whereby the fresh air/exhaust gas mixture is fed to the combustion engine from a corresponding mixing point where the suctioned fresh air is mixed with the exhaust gas re-circulated via the exhaust gas re-circulation line. As a result, a plurality of additional state variables can be determined without additional sensors.

Method for determination of composition of the gas mixture in a combustion chamber of an internal combustion engine with exhaust gas recirculation and correspondingly configured control system for an internal combustion engine

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Braunschweig, Germany

Thorsten Rebohl