EXHAUST LINE OF A DIESEL ENGINE AND DESULFATION METHOD

摘要

A method for desulfating an NOxTrap (6) of an exhaust line of a diesel engine, said method being intended to extract during the operation of said engine at least one portion of the fixed sulphur compounds in said NOxTrap, comprising the following steps: - production of a reformate via a reformer device from the fuel of the engine, - preheating of the NOxTrap via injection of the reformate in the flow (1) of exhaust gases, in an injection point (5) located downstream of the engine is upstream of the NOxTrap, until a predetermined desulfation temperature is reached in said NOxTrap, then - bypass of the flow of exhaust gases from a bypass point (2) of the exhaust line located upstream of the injection point and continuation of the injection of reformate in the NoxTrap in order to produce said desulfation, the richness of the mixture supplying the diesel engine not being affected in said method due to the execution of the abovementioned steps.