Method for operating exhaust treatment device of motor vehicle for cleaning exhaust gases, involves supplying of additive to supply point of exhaust treatment device, where operating state of exhaust treatment device is set

摘要

The method involves supplying of additive to a supply point (3) of the exhaust treatment device. An operating state of the exhaust treatment device (1) is set based on a state variable, in which deposits on an electric heater (2) appears on the basis of the state variable. A pulse frequency is set depending on the operating state, when the operating state lies in a predetermined operating state range. The electric heater is pulsed activated and deactivated with the fixed pulse frequency, when the operating state lies in the predetermined operating state range. An independent claim is included for a motor vehicle with a control unit.