Catalytic Converter

Proper emission control is accomplished with a special 3-way catalytic converter; that is, it converts all 3 major pollutants (HC, CO and NOx). The converter contains pellets coated with platinum and palladium (California vehicles have additional coating of rodium).

The 3-way catalytic converter used in the DFI system is a dual-bed converter. The "upstream" section of the converter contains a reducing/oxidizing bed to reduce NOx while at the same time oxidizing HC and CO. An air supply pipe from the AIR pump introduces an extra amount of air between the dual beds (during closed loop mode), so the second bed can oxidize any remaining HC and CO with a high conversion efficiency to minimize overall emissions.