DEVICE FOR PURIFYING EXHAUST GAS WITH A CONTROLLED INJECTION OF REDUCING AGENT

摘要

The invention concerns a device for purifying the exhaust gas of a motor vehicle, in which a controller (9) is configured to; apply a calculation model delivering a value indicative of a speed of storage of nitrogen oxides in a nitrogen oxide absorber (2), use the value indicative of a speed of storage of nitrogen oxides to obtain a value indicative of a speed of reduction of nitrogen oxides in a selective catalytic reduction catalyst (3).