Method for calibrating a control unit that controls or regulates a technical process that can be described by reaction kinetic equations, in particular for calibrating a control unit that controls or regulates exhaust gas aftertreatment in an exhaust gas stream of an internal combustion engine

摘要

The invention relates to a method for calibrating a control unit that controls or regulates a technical process that can be described by reaction kinetic equations, in particular for calibrating a control unit controlling or controlling an exhaust gas aftertreatment in an exhaust gas stream of an internal combustion engine, with a simulation model in which the plurality, in particular during a Exhaust aftertreatment, time-offset and / or parallel running reactions in the form of reaction kinetic equations are mapped, wherein the variable equation parameters of the individual reaction kinetic equations of the simulation model are calibrated by metrologically recorded on a test bench real values for the respective equation parameters. In accordance with the invention, a map model which is independent of the simulation model and has a plurality of characteristic maps is generated by using the reaction parameters of each reaction, in particular as part of an exhaust gas aftertreatment, as characteristic map parameters and defining at least one map, wherein Defining the characteristic maps by means of the simulation model values for the characteristic parameters influencing the reaction kinetics are determined and fed to the map model. Subsequently, a value for at least one of the characteristic diagram parameters of at least one characteristic field of the characteristic model is selectively detected for calibration of the characteristic model in real process operation and / or on the test bench and then determined by means of an evaluation device, if the detected measurement value in a defined predetermined extent of that in the respective map If necessary, the stored value is replaced by a new value without influencing the other maps of the characteristic map model that are not affected by the change.