A method for operating an exhaust aftertreatment and means for controlling an exhaust aftertreatment and exhaust aftertreatment and internal combustion engine with exhaust aftertreatment

摘要

The invention relates to a method and a device for operating an exhaust gas aftertreatment 300, in which a diesel particle filter DPF is regenerated during operation, in particular is passively regenerated, a corrected differential pressure ΔP from a current differential pressure ΔP across the diesel particle filter DPF at a current exhaust gas volume flow V_AG and a current correction factor is calculated. According to the invention, the current correction factor is determined by determining a lower differential pressure in a predetermined time interval for a certain exhaust gas volume flow, in particular in a predetermined exhaust gas volume flow interval around the determined exhaust gas volume flow V_AG and comparing the lower differential pressure with a predetermined current reference value and, depending on this, calculating a new one Correction factor or keeping the previous correction factor as the current correction factor.