What is a typical sign of a good catalytic converter on a five-gas analyzer?

A typical sign of a good catalytic converter is characterized by low levels of hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) while exhibiting high levels of carbon dioxide (CO₂). This pattern indicates that the catalytic converter is effectively reducing harmful emissions produced during combustion.

Low HC levels suggest that unburned fuel is minimized, indicating efficient combustion. Low CO levels show that there is less carbon monoxide being produced, which means that the combustion is nearing completion and energy is being converted more efficiently. Similarly, low NOx indicates that the combustion temperatures are being controlled effectively, resulting in lower nitrogen oxide emissions. Finally, high CO₂ levels are a sign that a significant amount of the fuel is being oxidized into carbon dioxide rather than being emitted as harmful pollutants, reflecting a well-functioning catalytic converter.

This combination of indicators reflects the catalytic converter's role in transforming harmful emissions into less harmful products, showcasing its effectiveness in an emissions control system.