The function of the sensor is to determine whether there is excess oxygen in the exhaust gas of the engine after combustion, that is, the oxygen content, and convert the oxygen content into a voltage signal to transmit to the engine computer, so that the engine can achieve a closed-loop control with excessive air factor as the goal; Ensure that the three-way catalytic converter has the maximum conversion efficiency for the three pollutants in the exhaust hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOX), and maximize the conversion and purification of emission pollutants.
When installing automotive oxygen sensors, the following points need to be noted:
1. Distinguish the position: the oxygen sensor is installed in front of the three-way catalytic converter, and the post-oxygen sensor is installed behind the three-way catalytic converter.
2. Tool preparation: Use professional tools to install the oxygen sensor, especially considering that the thread size of the oxygen sensor is generally M18, and the recommended torque is 45-55Nm.
3. High temperature protection: The working temperature of the oxygen sensor can reach 800 ° C. Therefore, pay attention to preventing burns when removing or installing the oxygen sensor and ensure that the exhaust pipe is completely cooled before operating it.
