Oxygen Sensor

Detailed Description

The oxygen sensor detects the oxygen volume in the exhaust gas, Acquires the voltage signal of air- Fuel ratio of the gas mixture, And sends the detected voltage signal to the Electronic Control Units (ECU). According to the voltage signal from the oxygen sensor, ECU modifies the fuel injection pulse width to keep the thickness of the gas mixture to the level of desirable air- Fuel ratio and realize feedback control (namely closed- Loop control) over the optimum air- Fuel ratio. In this condition, The engine can achieve complete combustion and minimum emission and fulfill the purpose of saving fuel and reducing exhaust gas. Structure of the Oxygen sensor 1. The ZrO 2 element. It is fixed through Sensor housing and is equipped with the Protective tube with slots to protect against oil dirt and fly ash. 2. Heating element. It penetrates inside the front end of the ZrO2 element for heating the sensor head. The welding line in the middle is sealed by a tube. 3. Wire. The conducting wire is led out from the heating element and ZrO2 element and is connected to the connector of the oxygen sensor. The led- Out conducting wire is covered with a layer of heat- Resistant rubber pipe.