BUCKLE EXHAUST FUMES RECIRCULATION.

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The loop (10) has a passage conduit (22) passing through a cooling liquid exit casing (24) of an engine (12), and an incandescent particle stop filter (26) including a catalytic phase with a hydrocarbon oxidation catalyst, where the filter is provided in the conduit. The filter includes a metallic structure with a mesh section between 1 to 3 square millimeters. The catalytic phase contains precious metal e.g. platinum and palladium, and zeolite material. The catalytic phase has an active oxidation phase with elements e.g. transition metal oxides and rare-earth metal oxides.