fr:Car Terms:C:Catalytic Converter MA/FR

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C

Catalytic converter

A catalytic converter turns harmful emissions from the car’s exhaust into less harmful gases before they are pumped out into the atmosphere. It contains a chemical catalyst (usually precious metals, such as platinum and rhodium), ceramic or metallic carrying materials, casing and various regulatory devices for controlling the process.

Depending on the design, the catalytic converter oxidises carbon monoxide to carbon dioxide and water and/or reduces nitrogen oxides to nitrogen and oxygen gas.

Efficient catalytic converters reduce the levels of pollutants in exhaust gas by up to 90%. Cars use three-way catalytic converters (for petrol engines) and oxidising catalytic converters (for diesel engines), featuring up to 2 main and 4 primary converters, depending on the engine.

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