What are the two types of catalytic converters mentioned?

The two types of catalytic converters mentioned are Pellet/Bed and Honeycomb. These classifications refer to the different designs and structures that catalytic converters can have, which are essential in facilitating the chemical reactions that reduce harmful emissions from vehicles.

Pellet/Bed catalytic converters contain a loose mix of catalyst pellets, which provide a surface for the exhaust gases to react upon. This design is effective in allowing the exhaust gases to pass through the bed of pellets, where the catalytic reactions occur, although it can be less efficient in terms of space and material compared to other designs.

On the other hand, Honeycomb catalytic converters feature a ceramic or metallic substrate arranged in a honeycomb pattern. This design maximizes the surface area available for reactions while minimizing the volume occupied by the converter. As a result, the honeycomb structure is more efficient in both reducing emissions and enhancing the overall performance of the engine.

Understanding these different types is crucial for emissions inspectors because they need to identify and ensure that the correct catalytic converter is installed and functioning properly to meet emissions standards.