What is an engine exhaust system failure?

1 Answers
KathrynLee
07/30/25 1:21am
Engine exhaust system failure is typically caused by poisoning of the three-way catalytic converter or damage to the oxygen sensor. Below is more detailed information about the automotive three-way catalytic converter: 1. Working Principle: When high-temperature exhaust gases pass through the purification device, the purifying agents in the three-way catalytic converter enhance the activity of CO, hydrocarbons, and NOx gases, promoting specific oxidation-reduction chemical reactions. CO is oxidized into colorless, non-toxic carbon dioxide gas at high temperatures; hydrocarbons are oxidized into water (H2O) and carbon dioxide; and NOx is reduced into nitrogen and oxygen. 2. Function: It converts harmful substances in the exhaust, such as hydrocarbons, carbon monoxide, and nitrogen oxides, into harmless substances like water, carbon dioxide, and nitrogen, thereby reducing engine emission pollution.
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