The role of the Lavida rear oxygen sensor, where is the Lavida oxygen sensor

Oxygen sensors are an essential element in engines that use three-way catalytic converters to reduce exhaust pollution. Because once the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification ability of the three-way catalyst for Co, HC and NOx will decrease sharply, so an oxygen sensor is installed in the exhaust pipe to detect the concentration of oxygen in the exhaust gas, and send a feedback signal to the ECU, and then the ECU controls the increase or decrease of the fuel injection volume of the injector, so as to control the air-fuel ratio of the mixture near the theoretical value.

Details: In order to obtain a high exhaust purification rate and reduce the composition of carbon monoxide, (HC) hydrocarbons and (NOX) nitrogen oxides in the exhaust, the EFI truck must use a three-way catalytic converter. However, in order to use the three-way catalytic converter effectively, the air-fuel ratio must be precisely controlled so that it is always close to the theoretical air-fuel ratio.

The catalytic converter is usually installed between the exhaust manifold and the muffler. The oxygen sensor has the characteristic that the voltage it outputs abruptly around the theoretical air-fuel ratio (:1).

This characteristic is used to detect the concentration of oxygen in the exhaust gas and feedback to a computer to control the air/fuel ratio. When the actual air-fuel ratio becomes high, the concentration of oxygen in the exhaust gas increases, and the oxygen sensor notifies the ECU of the state of the dilute mixture (small electromotive force: O volts).

When the air-fuel ratio is lower than the theoretical air-fuel ratio, the concentration of oxygen in the exhaust gas decreases, and the status of the oxygen sensor (large EMF: 1 volt) notifies the (ECU) computer.

The ECU determines whether the air-fuel ratio is low or high based on the difference in electromotive force from the oxygen sensor and controls the duration of the injection accordingly. However, if the oxygen transmitter is faulty and the output electromotive force is abnormal, the (ECU) computer will not be able to accurately control the air/fuel ratio. Therefore, the oxygen sensor can also compensate for the error of the air-fuel ratio caused by the wear and tear of other parts of the EFI system.

It can be said that it is the only sensor in the EFI system that has "intelligence".

The function of the sensor is to determine whether there is excess oxygen in the exhaust gas after the engine combustion, that is, the oxygen content, and convert the oxygen content into a voltage signal and transmit it to the engine computer, so that the engine can realize the closed-loop control with the goal of excess air factor; Ensure that the three-way catalytic converter has the maximum conversion efficiency for the three pollutants in the exhaust gas, namely hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOX), and maximize the conversion and purification of the emitted pollutants.

The oxygen content in the exhaust is fed back to help the engine computer correct the amount of fuel injected to ensure the vehicle's dynamics.

Generally, a car has two oxygen sensors, the oxygen sensor in front of the three-way catalysis is to detect the exhaust information signal feedback to the computer, so as to adjust the ignition time and fuel injection time, so as to fully burn as much as possible, and the oxygen sensor behind the three-way catalysis is to detect whether the three-way catalytic converter is normal.

The function of Lavida rear oxygen sensor: to detect the oxygen content of the air in the car in real time, and to transmit the detected oxygen content data to the on-board computer in real time.

Hello, the front and rear oxygen sensors just have different functions. The function of the front oxygen sensor is to feedback the oxygen content in the exhaust gas to the engine computer during the "closed-loop control", and the engine computer corrects the amount of fuel injection according to this signal. The rear oxygen sensor is installed at the rear of the three-way catalytic converter, and the rear oxygen sensor feeds back the oxygen content of the three-way catalytic converter to the engine computer, and the engine computer compares the signals of the two oxygen sensors, and the signal of the front oxygen sensor is higher than that of the rear oxygen sensor under normal circumstances, and if the signals of the two oxygen sensors are the same, it proves that the three-way catalytic converter fails.

Hope it helps!

Detect the concentration of exhaust oxygen and control the amount of fuel injected.

The function of the oxygen sensor is to determine whether there is excess oxygen in the exhaust of the engine after combustion, that is, the oxygen content, and convert the oxygen content into a voltage signal and transmit it to the engine computer, so that the engine can realize the closed-loop control with the goal of excess air factor; Ensure that the three-way catalytic converter has the maximum conversion efficiency for the three pollutants in the exhaust gas, namely hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOX), and maximize the conversion and purification of the emitted pollutants. The air-fuel ratio has a great influence on the content of hydrocarbons (HC) and carbon monoxide (CO) in the exhaust, and the contents of HC and CO decrease when the air-fuel ratio is lower than:1. If the air-fuel ratio is higher than:

At 1 o'clock, the contents of HC and CO increased rapidly. However, a lower air-fuel ratio leads to an increase in combustion temperature and an increase in nitrogen oxides (NOx) in the exhaust gas. Therefore, the ideal air-fuel ratio should be close to:

1 in a small range. In addition, the conversion efficiency of the three-way catalytic converter is only the highest in a small range with an air factor of 1.

Generally, a car has two oxygen sensors, the oxygen sensor in front of the three-way catalysis is to detect the information signal of the exhaust, and the anti-dry royal book feeds back to the macro to the computer, so as to adjust the ignition time and fuel injection time, so as to fully burn as much as possible, and the oxygen sensor behind the three-way catalysis is to detect whether the three-way catalytic converter is normal.

The function of the oxygen sensor is to determine the information about whether there is excess oxygen in the exhaust gas of the engine after combustion, that is, the oxygen content.

The Lavida oxygen sensor is on the exhaust pipe of the engine. After the oxygen sensor is damaged, it will lead to the poisoning of the oxygen sensor, the engine will produce a large amount of carbon deposits, the exhaust pipe of the car will emit black smoke, and the lack of power of the engine will be obviously felt in the process of driving the car, and it will also cause the heater resistance wire to burn out. The symptoms of damaged oxygen sensors are as follows:

1. Blocked by carbon particles, the signal voltage of the oxygen sensor will be biased to Weihuai, and the engine computer will issue instructions to reduce the amount of fuel injection, so that the mixture is too thin; Dust and oil block the through hole between the oxygen sensor and the atmosphere, and the signal voltage of the oxygen sensor will be low, and the engine electric mountain pressure reduction will indicate the injector to inject more fuel, causing the mixture to be too thick;

2. When the current oxygen sensor fails, the ECU can not get the information of the oxygen concentration in the exhaust pipe, so it cannot feedback and control the concentration of the mixture, (whether there is more or less fuel injection and air intake, the ECU does not know at all) In this way, the fuel consumption and exhaust pollution of the engine will increase, and the engine will have unstable idling, lack of fire, surge and other fault phenomena;

3. After the oxygen failure means that the operating conditions of the three-way catalysis cannot be judged, once the three-way catalysis fails, then the exhaust gas will exceed the standard, and the fuel consumption will affect the engine working condition, and the annual review or direct replacement of the three-way catalysis will be affected.

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The performance is as follows:1. The light will be on if the oxygen sensor is faulty.

2. The engine will shake when it is dismantled.

3. There is a sudden sound of exhaust and a choking smell. The solution to the broken front oxygen sensor is to use a fault diagnostic instrument to detect the voltage. Precautions for disassembling the oxygen sensor:

1. Install the sleeve to the root of the oxygen sensor and loosen it firmly.

2. Pay attention to the wiring harness on the oxygen sensor when unscrewing, and do not rotate to the end when screwing, the wiring harness is easy to deform and break.

3. After unscrewing, adjust the rotation angle back and forth to protect the wiring harness.

4. The size of the sleeve is different, so as to ensure that the size is suitable for the oxygen sensor to resist the excitation.

The failure of the Lavida oxygen sensor can continue to be opened, but it needs to be repaired in time, otherwise long-term driving will increase the harm to the engine. After the oxygen sensor is damaged, it will lead to the poisoning of the oxygen sensor, the engine will produce a large amount of carbon deposits, and the exhaust pipe of the car will emit black smoke.

The symptoms of damaged oxygen sensors are as follows:

1. If it is blocked by carbon particles, the signal voltage of the oxygen sensor will be high, and the engine computer will issue instructions to reduce the amount of fuel injection, so that the mixture is too thin; Dust and oil block the through hole between the oxygen sensor and the atmosphere, and the wide-bridge signal voltage of the oxygen sensor will be low, and the engine voltage will indicate the injector to inject more fuel, causing the mixture to be too thick;

2. When the current oxygen sensor fails, the ECU can not get the information of the oxygen concentration in the exhaust pipe, so it can not feedback and control the concentration of the mixture, (more fuel injection and air intake or less digging, ECU does not know at all) In this way, the motor fuel consumption and exhaust pollution will increase, and the engine will have unstable idling, lack of fire, surge and other fault phenomena;

3. After the oxygen failure, it means that the operating conditions of the three-way catalysis cannot be judged, once the three-way catalysis fails, then the exhaust gas will exceed the standard, the fuel consumption will affect the engine working condition, and the heavy will affect the annual review or direct replacement of the three-way catalysis.

Once the oxygen sensor fails, the computer of the electronic fuel injection system can not get the information of the oxygen concentration bridge in the exhaust pipe, so it can not feedback and control the air-fuel ratio, which will increase the engine fuel consumption and exhaust pollution, and the engine will have unstable idling, lack of fire, surge and other fault phenomena.

Once the oxygen sensor fails, the computer of the electronic fuel injection system can not get the information of the oxygen concentration in the exhaust pipe, so it can not feedback and control the air-fuel ratio, which will increase the engine fuel consumption and exhaust pollution, and the engine will have unstable idling, lack of fire, surge and other fault phenomena.

Once the oxygen sensor fails, the computer of the electronic fuel injection system can not get the information of the oxygen concentration in the exhaust pipe, so it can not feedback and control the air-fuel ratio, which will increase the engine fuel consumption and exhaust pollution, and the engine will have unstable idling, lack of fire, surge and other fault phenomena.

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 and transmit it to the engine computer, so that the engine can realize the closed-loop control with the goal of excess air factor; Ensure that the three-way catalytic converter has the maximum conversion efficiency for the three pollutants in the exhaust gas, namely hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOX), and maximize the conversion and purification of the emitted pollutants.

Photo by Q&A: Q&A called Stop the Beast) Xpeng Motors P7 Model Y Aion V Ideal One NIO EC6 Model X @2019

Once the oxygen sensor fails, the computer of the electronic fuel injection system can not get the information of the oxygen concentration in the exhaust pipe, so it can not feedback and control the air-fuel ratio, which will increase the engine fuel consumption and exhaust pollution, and the engine will have unstable idling, lack of fire, surge and other fault phenomena.

Once the oxygen sensor fails, the computer of the electronic fuel dust and oil injection system cannot get the information of the oxygen concentration in the exhaust pipe, so it cannot feedback and control the air-fuel ratio, which will increase the engine fuel consumption and exhaust pollution, and the engine will have unstable idling, lack of fire, surge and other fault phenomena.

Once the oxygen sensor fails, the computer of the electronic fuel injection system can not get the information of the oxygen concentration in the exhaust pipe, so it can not feedback and control the air-fuel ratio, which will increase the engine fuel consumption and exhaust gas pollution, and the engine will have unstable idling, lack of fire, surge and other fault phenomena.

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 and transmit it to the engine computer, so that the engine can realize the closed-loop control with the goal of excess air factor; Ensure that the three-way catalytic converter has the maximum conversion efficiency for the three pollutants in the exhaust gas, namely hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOX), and maximize the conversion and purification of the emitted pollutants.

Summary. In response to this problem, we can take the following solutions: First, we want to check whether the front oxygen sensor of the car is damaged, and if there is damage, we need to replace the front oxygen sensor with a new one.

The steps to replace the front oxygen sensor are as follows:1Remove the front oxygen sensor of the car first, and be careful when disassembling it to avoid damaging other parts.

2.Inspect the disassembled AM sensor, if there is damage, you will need to replace it with a new one. 3.

When installing a new front oxygen sensor, pay attention to the installation position when installing, so as to avoid car failure caused by improper installation. 4.After the installation is completed, it is necessary to check if the front oxygen sensor of the car is working properly, if it is normal, it can be driven normally.

In addition, when replacing the front oxygen sensor, it is also necessary to pay attention to the emission standards of the car to ensure that the emissions of the car meet the standards set by the state.

In response to this problem, we can take the following solutions: First, we want to check whether the front oxygen sensor of the car is damaged, and if there is damage, we need to replace the front oxygen sensor with a new one. The steps to replace the front oxygen sensor are as follows:

1.Remove the front oxygen sensor of the car first, and be careful when disassembling it to avoid damaging other parts. 2.

Check the disassembled AToDE sensor, if there is damage, you will need to replace it with a new ASx sensor. 3.When installing a new front oxygen sensor, pay attention to the installation position when installing, so as to avoid the failure of the car cracking family caused by improper installation.

4.After the installation is completed, it is necessary to check if the front oxygen sensor of the car is working properly, if it is normal, it can be driven normally. In addition, when replacing the front oxygen sensor, it is also necessary to pay attention to the emission standards of the car to ensure that the emissions of the car meet the standards stipulated by the state.

Can you add, I don't quite understand it.

In response to this problem, we can say that when the front oxygen sensor of the car is broken, there is generally no abnormal phenomenon. However, when the front oxygen sensor is broken, the car's engine will have performance problems, such as engine stalling, shaking, poor acceleration, etc. In addition, when the front oxygen sensor is broken, the car's emissions will also be affected, and the emissions will increase, and the car's fuel consumption will also increase.

The front oxygen sensor is an important part of the automobile engine, and its function is to detect the oxygen concentration in the exhaust system of the engine, and feedback the information to the engine control unit to adjust the fuel mixing ratio of the engine, so as to achieve the purpose of fuel saving and emission reduction. Therefore, when the front oxygen sensor is broken, the performance and emissions of the engine will be affected, so the front oxygen sensor should be repaired or replaced in time to ensure the normal use of the car.