Catalytic Converter

The oxidizing pre and main catalytic converters are installed in the front and center sections of the exhaust system. The catalytic converter assemblies are common to all Petrol vehicles, however, the catalyst coating specification varies depending on the market.

The HO2S's monitor the exhaust gasses leaving the engine. Two HO2S are fitted; a pre catalytic converter located in the front section elbow and a post catalytic converter HO2S The engine management system uses this information to provide accurately metered quantities of fuel to the combustion chambers to ensure the most efficient use of fuel and to minimise the exhaust emissions. For additional information, refer to: ELECTRONIC ENGINE CONTROLS .

The catalytic converter further reduces the carbon monoxide and hydrocarbons content of the exhaust gases. In the catalytic converter the exhaust gases are passed through honeycombed ceramic elements coated with a special surface treatment called a 'washcoat'.

The washcoat increases the surface area of the ceramic elements by a factor of approximately 7000. On top of the washcoat is a coating containing platinum, which is the active constituent for converting harmful emissions into inert by-products. The platinum adds oxygen to the carbon monoxide and the hydrocarbons in the exhaust gases, to convert them into carbon dioxide and water respectively.