Patent ID: 6632406
Filing Date: 2003-10-14
Classification: F01N

Abstract:
Device for removing pollution from exhaust gases of an internal combustion engine and having successive filtration and regeneration phases, the device includingan exhaust box (12) containing, in series, a catalytic purification unit (18) and a particle filter (20) having pores of sufficiently small diameter to retain particles of soot on its upstream face during said filtration phases and enabling the particles of soot on its upstream face to be burned during said regeneration phases to form ash, and means (36; 60) providing access to the upstream face of the particle filter (20), which access means have a cross section sufficient to enable cleaning of the particle filter (20), still contained in the exhaust box, by removal of the ash which is retained on the upstream face of the filter, wherein said exhaust box comprises a cylindrical wall (24) extended on one side by a divergent section (26) connecting an inlet pipe (28), and extended on the other side by a convergent section (30) terminating in an outlet pipe (32), and wherein the filter has sufficient heat resistance so as not to be altered when the particles of soot are burned on the upstream face of the filter.