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What is the working principle of an oxygen sensor?

1 Answers

LaHaven

07/29/25 11:39pm

The working principle of an oxygen sensor is: using a ceramic sensitive element to measure the oxygen potential in the vehicle's exhaust pipe, calculating the corresponding oxygen concentration based on the chemical equilibrium principle, in order to monitor and control the air-fuel ratio of combustion, ensuring product quality and compliance with exhaust emission standards. The function of the oxygen sensor is: to determine whether there is excess oxygen in the exhaust after engine combustion, and to convert the oxygen content into a voltage signal transmitted to the engine computer, enabling the engine to achieve closed-loop control targeting excess air, ensuring that the three-way catalytic converter has high conversion efficiency for hydrocarbons, carbon monoxide, and nitrogen oxide pollutants in the exhaust, thereby maximizing the conversion and purification of emission pollutants.

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