The most well-liked method employed by auto makers to control the exhaust emissions could possibly be the three-way catalyst. This system converts the principal pollutants within your exhaust gasoline to much less damaging gasses. However, the three-way catalyst only performs effectively once the air-fuel ratio is within of quite tight limits. This could possibly be the work using the especially where the oxygen sensor.
The oxygen sensor is situated within your exhaust pipe just preceding to the three-way catalyst. The middle element using the oxygen sensor is subjected for the exhaust gas.
The oxygen sensor constantly detects the oxygen content articles within your exhaust gas. Its output signal is linked for the ECU and modifications to show a abundant or trim fuel mixture. by means of its output signal, the sensor “informs” the ECU once the auto is operating abundant or lean. The ECU utilizes this data to create a decision whether or not it should increase or reduce the fuel amount to acquire optimum air-fuel ratio. this really is referred to as closed loop control. By ensuring how the air:fuel mixture is continually precise each combustion and catalyst efficiency are optimized.