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Catalytic Converter

  Related Terms
• Feedback Air/Fuel Ratio Control System.

Definition: Often simply called a "catalyst": a stainless-steel canister fitted to a car's exhaust system that contains a thin layer of catalytic material spread over a large area of inert supports. The material used is some combination of platinum, rhodium, and palladium; it induces chemical reactions that convert an engine's exhaust emissions into less harmful products. So-called three-way catalysts are particularly efficient; their operation, however, demands very precise combustion control, which can be produced only by a feedback fuel-air-ratio control system.

Related Resources:

Catalytic Converters
What is a catalytic converter and how does it do what they do.
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