Lumina APV V6-3800 3.8L (1994)
Catalytic Converter: Description and Operation
Converter Types
SYSTEM DESCRIPTION
The catalytic converter is an emission control device added to the exhaust system to effectively reduce the levels of carbon monoxide, hydrocarbons, and
in some cases oxides of nitrogen, exiting the tailpipe.
The converter contains catalysts that promote oxidation of residual hydrocarbons and carbon monoxide gases in the exhaust.
More recently, converters contain an additional catalyst (rhodium) that also promotes reduction of oxides of nitrogen emissions. These type converters
are referred to as "Three-Way Catalytic converters. Three-Way converters reduce these harmful compounds into their constituent elements oxygen and
nitrogen gas.
Because of the high temperatures generated within the converter, heat shields are necessary to protect chassis components, passenger compartment, and
other areas from heat related damage.
