What is the function of the front and rear oxygen sensors?
2 Answers
The functions of the front and rear oxygen sensors are: 1. The front oxygen sensor detects the oxygen content in the exhaust; 2. The rear oxygen sensor checks whether the three-way catalytic converter is functioning properly. The working principle of the front oxygen sensor is: The front oxygen sensor can detect the oxygen content in the exhaust and then feed the signal back to the ECU. Based on this signal, the ECU can adjust the air-fuel ratio of the engine. The working principle of the rear oxygen sensor is: The rear oxygen sensor feeds the signal back to the ECU, and the ECU compares the data from the front and rear oxygen sensors. If the data from both sensors is the same, it indicates that the three-way catalytic converter is damaged.
The front and rear oxygen sensors in a car play crucial roles. The front oxygen sensor, usually located near the engine exhaust port, detects the oxygen level in the exhaust and transmits this information to the car's computer system to help adjust the air-fuel mixture ratio, ensuring efficient and complete combustion. This not only saves fuel costs but also prevents engine issues like knocking. The rear oxygen sensor is positioned behind the catalytic converter and specifically monitors whether the catalytic function is working properly. If the converter fails and exhaust pollutants exceed standards, this sensor will promptly alert the driver. I've seen many cars experience skyrocketing fuel consumption or fail emission tests due to aging sensors. Regularly checking these small components can avoid costly major repairs and ensure smooth driving. After all, a stable engine operation gives peace of mind while driving.
