| 摘要 |
A method and device for regeneration of a particulate filter situated on an exhaust line of an engine. The method determines a soot burden on the filter based on knowledge of a differential pressure DeltaP at ends of the filter and triggers combustion of the soot when the burden reaches a predetermined level. A pressure Pdownstream downstream from the filter is modeled without use of a pressure sensor and Pupstream is determined without use of a pressure sensor using the relationship Pupstream=DeltaP+Pdownstream. The burden is determined by the relationship DeltaP=f (Qvol, mass of soot), with Qvol=Kx(Qair+rhofuelxQcarb)xNxTupstream/Pupstream, where K is a constant, Qair denotes a mass flow of air, rhofuel denotes a density of the fuel, Qcarb denotes a volumetric quantity of fuel, N denotes an rpm of the engine, and Tupstream denotes an absolute temperature measured upstream from the filter.
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