METHOD FOR OPERATING A HEATING CATALYST

摘要

The invention relates to a method for operating an exhaust gas treatment device (1) comprising an electric heater (2) for heating an exhaust gas flow in the exhaust gas treatment device (1) and/or a surface (25) in the exhaust gas treatment device (1) and comprising a feeding point (3) for feeding an additive into the exhaust gas treatment device (1) so that the additive impinges upon the electric heater (2). In step a) additives are supplied to the supply point (3). In step b) an operational state (4) of the exhaust gas treatment device (1) is determined using at least one state variable (5), in which deposits can impinge upon the electric heater (2). In step c) a clock frequency (6) is determined in accordance with the operational state (4) when the operational state (4) established in step b) lies in a predetermined operational state range (7). In step d) a clocked activation and deactivation of the electric heater (2) takes place using the determined clock frequency (6) when the operational state (4) determined in step b) lies in the predetermined operational state range (7).