Oxygen Sensor

On engines that use three-way catalytic converters to reduce exhaust pollution, oxygen sensors are an essential element. As the air-fuel ratio of the mixed gas deviates from the theoretical air-fuel ratio, the purification capacity of the three-way catalyst for CO, HC and NOx will drop sharply. Therefore, an oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in The ECU sends a feedback signal, and then the ECU controls the increase or decrease of the fuel injection amount of the injector, thereby controlling the air-fuel ratio of the mixture to be near the theoretical value.
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