METHOD FOR MODEL-BASED DETERMINATION OF THE TEMPERATURE DISTRIBUTION OF AN EXHAUST GAS POST-TREATMENT UNIT

摘要

The present invention relates to a method for model-based determination of the temperature distribution of an exhaust aftertreatment unit wherein the steady-state operation and the abnormal-state operation are distinguished in consideration of the axial and radial temperature distributions, In the case of model-based determination, based on the virtual partitioning, the radial heat transfer to the periphery, especially for steady-state operations, is taken into account by the heat transfer coefficient R _c , and for the unsteady state operations, The heat transfer from the flowing exhaust gas to the segments is taken into account by the heat transfer coefficient k.