Method for operating exhaust gas treatment device of motor vehicle, involves supplying of additives to supply point, where operational state of exhaust gas treatment device is determined using one state variable

摘要

The method involves supplying of additives to a supply point (3). An operational state of the exhaust gas treatment device (1) is determined using one state variable, in which deposits appear upon an electric heater (2). A clock frequency is determined in accordance with the operational state when the operational state lies in a predetermined operational state range. A clocked activation and deactivation of the electric heater takes place using the determined clock frequency when the operational state lies in the predetermined operational state range. The additive is a reducing agent. An independent claim is included for a motor vehicle with a control unit.