Why your car need oxygen sensor
Automobile oxygen sensor is a key feedback sensor in the control system of electronic injection
engine. It is a key part for controlling automobile exhaust emission, reducing automobile
environmental pollution and improving the combustion quality of automobile engine fuel.
The O2 sensor is installed on the exhaust pipe of the engine.
An engine with only one oxygen sensor controls the engine's fuel injection by monitoring the
oxygen content in the exhaust and passing the signal to the engine control computer to achieve
feedback control of the air/fuel ratio.
An engine equipped with two oxygen sensors, the former oxygen sensor mainly controls the
air/fuel ratio, and the latter oxygen sensor monitors the oxygen content in the exhaust gas after
passing through the three-way catalytic reactor, and transmits the signal to the engine control.
The computer, so that the engine computer can judge the working condition and working
efficiency of the three-way catalytic reactor, so as to prompt the driver to promptly replace the
failed three-way urging device to avoid environmental pollution.