Where is the oxygen sensor installed in a car?
1 Answers
The oxygen sensor is installed in the exhaust pipe, typically with the first one located before the catalytic converter and the second one after it. One sensor detects the engine's combustion conditions, while the other monitors the oxygen levels after the catalytic converter. You can identify the oxygen sensor as the large screw with wires attached on the exhaust pipe. Here is some relevant information about automotive oxygen sensors: 1. Function: The oxygen sensor is a critical feedback sensor in the electronic fuel injection system, playing a key role in controlling vehicle emissions, reducing environmental pollution, and improving fuel combustion efficiency in the engine. Oxygen sensors are always installed on the engine's exhaust pipe. 2. Working Principle: The oxygen sensor operates similarly to a battery, with zirconia elements acting like an electrolyte. Its basic principle is that under certain conditions (high temperature and platinum catalysis), it generates a voltage difference based on the oxygen concentration gradient between its inner and outer surfaces. The greater the concentration difference, the larger the voltage difference. The oxygen content in the atmosphere is 21%, while the exhaust from rich mixture combustion contains virtually no oxygen. The exhaust from lean mixture combustion or misfires contains more oxygen, but still significantly less than atmospheric levels.
