Abstract: A catalytic purification device including a substrate permeable to exhaust gases, is optionally impregnated with catalytic materials, and is provided with an upstream face and an opposing downstream face; and an envelope containing the permeable substrate and defining an enclosure provided with an inlet line and an outlet line, between which the permeable substrate is arranged, the upstream face of the permeable substrate projecting along the extension of the inlet line, and the axis of the inlet line defining, with the upstream face (14A), an angle smaller than 20°. The envelope includes a deflector arranged at the outlet of the inlet line, the deflector being inclined towards the upstream face and used to orient the exhaust gases escaping from the inlet line towards the permeable substrate. The envelope also includes elements for creating turbulence in the flow along the upstream face.

Abstract: A catalytic purification device including a substrate permeable to exhaust gases, is optionally impregnated with catalytic materials, and is provided with an upstream face and an opposing downstream face; and an envelope containing the permeable substrate and defining an enclosure provided with an inlet line and an outlet line, between which the permeable substrate is arranged, the upstream face of the permeable substrate projecting along the extension of the inlet line, and the axis of the inlet line defining, with the upstream face (14A), an angle smaller than 20°. The envelope includes a deflector arranged at the outlet of the inlet line, the deflector being inclined towards the upstream face and used to orient the exhaust gases escaping from the inlet line towards the permeable substrate. The envelope also includes elements for creating turbulence in the flow along the upstream face.