DEVICE FOR REDUCING THE LEVEL OF POLLUTANTS IN EXHAUST EMISSIONS, IN PARTICULAR VEHICLE EXHAUST EMISSIONS

摘要

Described is a device for reducing pollutant levels, in particular in vehicle emissions, the device comprising a housing (1) with a catalyst body (2) disposed inside it to leave a gap between the catalyst body and the wall of the housing and with expanding matting (3) located in the gap between the catalyst and the housing wall. The expanding matting is a heat-resistant non-woven containing, embedded in it, expanding particles whose volume increases when a given temperature, produced by the hot exhaust gases, is reached. An auxiliary heater fitted in the gap between the housing (1) and the catalyst body (2) also enables the expanding matting (3) to be heated to the expansion temperature.