Prizm L4-1800cc 1.8L DOHC (1993)
Catalytic Converter: Description and Operation
Three Way Converter Cutaway
Exhaust System
Purpose
The purpose of three-way catalytic converters is to neutralize carbon monoxide, hydrocarbons and oxides of nitrogen in the exhaust gases. This is
achieved by converting carbon monoxide and hydrocarbons to carbon dioxide and water. Oxides of nitrogen are converted to nitrogen and water.
Operation
This chemical conversion is caused by the platinum and rhodium metals in the converter. The exhaust gases are forced by these noble metals in the
converter, inducing the chemical reaction. The noble metal content is about two grams.
Operating Temperature
The effective conversion of pollutants begins at an operating temperature of about 250°C (450°F). The ideal operating temperature is 400°C-800°
