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
The catalyst material inside the converter is made of a ceramic substrate coated with catalytically active, precious metals.