Method for determining dosage for reagent material drop entry in exhaust duct of internal combustion engine, involves operating exhaust gas sensor arranged in exhaust gas area with exhaust gas sensor-diagnostic temperature-set point

摘要

The method involves operating exhaust gas sensor (14) arranged in an exhaust gas area with an exhaust gas sensor-diagnostic temperature-set point. The exhaust gas sensor-diagnostic temperature-set point lies above the evaporation temperature of reagent material in the exhaust gas area and below the danger temperature of the exhaust gas sensor. The dosage (m-ReaTro, Vol-ReaTro, n-ReaTro) for the reagent material drop entry (13) is determined on the basis of a quantity of the heat energy supplied for a heating element (15) of the exhaust gas sensor. Independent claims are also included for the following: (1) a device for determining a dosage for a reagent material drop entry in an exhaust duct of an internal combustion engine; (2) a control program for executing the dosage determining method; and (3) a control program product with program code stored in machine readable carrier for executing the dosage determining method.