Method for optimizing a nitrogen oxide emission and a carbon dioxide emission of an internal combustion engine

摘要

The invention relates to a method for the simultaneous optimization of a nitrogen oxide emission and a carbon dioxide emission of an internal combustion engine with an exhaust aftertreatment system of a motor vehicle. The method comprises the following steps: Initially, a prediction horizon (PH) is selected (100), then a nitrogen oxide limit (m _{NOx_max} ) is set (101). There is a minimization (102) of a cost function (K), which comprises the nitrogen oxide emission and the carbon dioxide emission, wherein the nitrogen oxide limit value (m _{NOx_max} ) is maintained. Subsequently, actuators of the internal combustion engine are set to a set point (S) determined during minimization (102) of the cost function (K) (105). Finally, the process steps are repeated.