Catalytic Converter

WARNING: This page is about a different car, the 2020 Jaguar XF and 2019 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

The oxidizing catalytic converter is installed in the front section of the exhaust system. The catalytic converter assembly is common to all Petrol vehicles.

The HO2S's monitor the exhaust gasses leaving the engine. Two HO2S's are fitted to each pipe; a mid catalytic converter 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 group metals (PGMs), which are the active constituents for converting harmful emissions into inert by-products. The PGMs react with oxygen, and these, when combined with the carbon monoxide and hydrocarbons in the exhaust gases, convert them into carbon dioxide and water respectively.