Patent ID: 9623378
Date: 2017-04-18
CPC Classifications: B01D,F01N,Y02A,Y02T

Claim:
1. A method for operating an exhaust gas treatment device having at least one storage device and at least one heater positioned therein, the at least one storage device, located upstream of an SCR catalytic converter for a reducing agent and the exhaust gas treatment device having at least one delivery device for the reducing agent, the method comprising the following steps: a) checking a filling level of the at least one storage device; b) detecting a current exhaust gas mass flow of an exhaust gas produced by an internal combustion engine coupled to said exhaust gas treatment device and flowing through the exhaust gas treatment device; and c) delivering reducing agent with the delivery device, if the filling level of the at least one storage device is below a minimum filling level and if the exhaust gas mass flow detected in step b) is in a low-load range of operation of the internal combustion engine for allowing the reducing agent delivered by the delivery device to reach the storage device; checking an exhaust gas temperature of the exhaust gas prior to the delivery of the reducing agent in step c); and heating at least the exhaust gas mass flow or the reducing agent with the at least one heater if the exhaust gas temperature is below a minimum temperature limit.