The role of the post-oxygen sensor.
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.
The functions of the sensor are:
1, the main oxygen sensor includes a heating zirconia element of the hot rod, heating rod by (ECU) computer control, when the air intake is small (exhaust temperature is low) current flow to the heating rod heating sensor, enabling accurate detection of oxygen concentration.
2. The vehicle is equipped with two oxygen sensors, one before the three-way catalytic converter and one after. The role of the front is to detect the air-fuel ratio of the engine in different working conditions, and the computer adjusts the fuel injection amount and calculates the ignition time according to the signal. The main thing behind is to detect the work of the three-way catalytic converter! That is, the conversion rate of the catalyst. By comparing with the data of the front oxygen sensor, it is an important basis to detect whether the three-way catalytic converter works normally (good or bad).
What does a broken oxygen sensor do to the car?
01 Increased fuel consumption
Damage to the rear oxygen sensor will result in increased fuel consumption. This is because carbon deposition on the oxygen sensor can lead to abnormal signal output, which in turn affects the mixing ratio of the engine, making it unbalanced. When the mixture ratio of the engine is unbalanced, in order to maintain normal combustion, the engine will control more fuel injection, resulting in too much mixture, which in turn increases fuel consumption. In addition, due to the failure of the oxygen sensor, the incorrect information transmitted can cause the engine oxygen content to be too high, which further leads to increased fuel consumption. Therefore, once the oxygen sensor is damaged, it should be replaced in time to avoid increased fuel consumption.
02 Pollutant discharge increases
Damage to the rear oxygen sensor will result in excessive vehicle exhaust emissions. This is because the post-oxygen sensor is a key part of the normal operation of the three-way catalytic converter. When the post-oxygen sensor fails, the three-way catalytic converter cannot work properly, so that it cannot effectively convert harmful substances into harmless substances. In this way, the vehicle will emit more pollutants during the driving process, resulting in excessive exhaust emissions.
03 Speed up slowly
Damage to the rear oxygen sensor will cause the vehicle to slow down. This is because the afteroxygen sensor is responsible for monitoring the amount of oxygen emitted by the engine and passing this information to the vehicle's computer control system. When the afteroxygen sensor is damaged, the vehicle computer cannot accurately obtain this critical data, so that the engine cannot be accurately controlled and adjusted. This can lead to a reduction in the combustion efficiency of the engine, which in turn affects the acceleration performance of the vehicle, making it slow down.
04 Engine failure light will be on
After the oxygen sensor is damaged, the engine failure light will light up. This is because the afteroxygen sensor is responsible for monitoring the oxygen content emitted by the engine and transmitting the data to the vehicle's electronic control system. When the afteroxygen sensor is damaged, it cannot accurately provide these data, resulting in the electronic control system can not accurately judge the working state of the engine. In this case, the electronic control system will think that there is a possible engine failure, so the engine failure light to alert the driver.
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAUXS auto parts welcome to buy.
