Catalytic Converter: Description and Operation

Three-Way Catalytic Converter:

PURPOSE
- The catalytic converter is mounted in the engine exhaust stream and plays an important role in the emission control system. The converter works as a gas reactor by speeding up the heat producing chemical reaction in order to reduce the air pollutants in the engine exhaust.

- The Three-Way Catalytic Converter (TWC) is not only effective for catalyzing the oxidation reactions of HC and CO, but it also catalyzes the reduction of NOx.

CONSTRUCTION
- Three way catalytic Converters in single-catalyst systems use a catalyst of monolithic construction in a clamshell container.

- The catalytic agent used in the TWC is an alloy of platinum and rhodium and/or palladium and rhodium. The use of unleaded fuel is required.