METHOD AND SYSTEM FOR PURIFYING THE EXHAUST GASES OF A COMBUSTION ENGINE

摘要

SCR method for purifying the exhaust gases of an internal combustion engine of a vehicle, according to which an ammonia precursor is stored in a container (1) mounted on board the vehicle. The method is such that it comprises the steps of: - decomposing one part of the ammonia precursor into an aqua ammonia; - storing the aqua ammonia in a unit (2) mounted on board the vehicle; - metering the stored aqua ammonia into the exhaust gases.