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Working principle of automobile oxygen sensor

Nov 19,2018

Oxygen sensors are essential components in engines that use ternary catalytic converters to reduce exhaust pollution. Because the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification ability of the ternary catalyst to CO, HC and NOx will drop sharply, so the oxygen sensor is installed in the exhaust pipe to detect the concentration of oxygen in the exhaust gas, and send a feedback signal to the ECU, and then the ECU controls the increase or decrease of the fuel injection Thus the air-fuel ratio of the mixture is controlled near the theoretical value.

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