Method for treating exhaust gas of internal combustion engine for reducing temperature of exhaust gas treatment unit in exhaust line, involves inserting cooling supercharged air corresponding to exceeding limit value of temperature

摘要

The method involves reducing the insertion of the supercharged air into the exhaust gas, if the internal combustion engine (12) is operated with lean fuel air mixture. The cooling supercharged air is inserted corresponding to the exceeding limit value of the temperature of the exhaust gas treatment unit (26) or the pressure in a charge air line (14) and in the exhaust strand (20) or the number of revolutions of the internal combustion engine.