Patent ID: 8201391

Claim:
A device for operating an internal combustion engine, the device comprising a controller configured to implement a method of operating the internal combustion engine having an exhaust zone that contains an exhaust gas treating device, wherein a pressurized oxidizable reagent is injected into the exhaust zone with the internal combustion engine or the exhaust gas treating device operating at a default status; the method including determining a correction value for a reagent signal which determines a quantity of the pressurized oxidizable reagent injected into the exhaust zone, wherein the correction value is determined by a comparison of a measure of an actual quantity of the pressurized oxidizable reagent in the exhaust zone, which has been introduced due to a measure of a preset target quantity of the pressurized oxidizable reagent, and a measure of a target quantity of the pressurized oxidizable reagent, and wherein the correction value is determined at a plurality of different pressure values when the internal combustion engine is operating in an idle status.