Device for removing pollution from exhaust gases
AssigneeEcia Industrie
InventorsJoël Michelin, Jean-Pierre Barnabé
Life of this patent
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Abstract
The device for removing pollution from the exhaust gases of an internal combustion engine includes an exhaust box (12) containing, in series, a catalytic purification unit (18) and a particle filter (20). The exhaust box (12) includes means (36; 60) providing access to the upstream face of the particle filter (20). Application to removing pollution from automobile vehicle diesel engines in particular.
Claims11
Device for removing pollution from exhaust gases of an internal combustion engine and having successive filtration and regeneration phases, the device including
- an 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.
Use, in a device for removing pollution from exhaust gases of an internal combustion engine which has successive filtration and regeneration phases, of an exhaust box (12) containing:
- a catalytic purification unit (18) and a particle filter (20) disposed in series, the particle filter being adapted to retain particles of soot on its upstream face during said filtration phases and to enable the particles of soot on its upstream face to be burnt during said regeneration phases to form ash, and
- means (36;
- 60) providing access to the upstream face of the particle filter (20), the access means having a cross section suited to cleaning of the particle filter to enable removal of the ash retained on the upstream face of the particle filter still contained in the exhaust box.
Dependencies are inferred from the claim text.