Celica Coupe L4-132 2164cc 2.2L DOHC (5S-FE) (1992)
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Catalytic Converter: Description and Operation
Federal
Three-way Catalyst System And Operations
PURPOSE
The three way catalyst (TWC) reduces oxides of nitrogen (NOx) as well as HC and CO, producing nitrogen, water, and carbon dioxide as
by-products.
OPERATION
The catalytic converter consists of an aluminum carrier coated with a catalyst (active material) such as platinum or palladium which is enclosed in
a heat resistant steel shell. The catalyst material uses residual oxygen in the exhaust gasses to convert HC, CO, and in some cases NOx, into less
harmful substances.
