How does the nitrogen oxygen sensor work, and what are the causes of the nitrogen oxygen sensor brea

There is currently no definite nitrogen oxygen sensor, only an oxygen sensor.

The basic working principle is: under certain conditions, the use of zirconia.

The difference in oxygen concentration between the inner and outer sides creates a potential difference.

And the larger the concentration difference, the greater the potential difference. The oxygen content in the atmosphere is 21%, and the exhaust gas after the combustion of the concentrated mixture actually does not contain oxygen, and the exhaust gas generated after the combustion of the dilute mixture or the exhaust gas produced by the lack of fire contains more oxygen, but it is still much less than the oxygen in the atmosphere. Catalyzed by high temperature and platinum, negatively charged oxygen ions are adsorbed on the inner and outer surfaces of the zirconia sleeve.

The difference in the concentration of ions on both sides creates an electromotive force.

Nitrogen oxygen sensor, it should be a car oxygen sensor, right? Or what device?

Nitrogen oxygen sensors, generally used in trucks, diesel engines, and urea together to reduce nitrogen oxides to water and N2, so that combustion can more fully reduce the emission of harmful gases, nitrogen oxides, HC, and carbon oxide in automobile exhaust. 、

Ceramics work at a high temperature of 800 degrees, and the quality of this chip ceramic itself has a lot to do with it, after all, the working environment is harsh and cannot enter the water, once the water enters, the ceramic will break.

Diesel engines, diesel fuel is more likely to damage parts than gasoline, and the quality of the oil also has a lot to do with it.

When the circuit is subjected to excessive current and voltage, it is easy to damage the components, that is, electronic modules, mechanical vibration, silicon poisoning, and carbonization.

Hello, the reason why the nitrogen oxygen sensor is often bad is the fuel quality, engine working conditions, electronic control system circuits, these problems and the aging of the oxygen sensor, the role of the nitrogen oxygen sensor in the engine electronic control system is to detect how much fuel is supplied to the engine, more, less unit control less fuel injection, less fuel injection. I hope it can help you, I hope you can give a thumbs up, thank you for your support and trust in the platform, thank you.

Nitrogen oxygen sensors, also known as NOx sensors, are an important component in vehicle exhaust control systems. Its main function is to detect the nitrogen oxide content in the vehicle exhaust to assist the vehicle control system to adjust the exhaust gas and thus reduce the environmental impact.

The detection principle of the nitrogen oxide sensor is to convert the nitrogen oxide compounds into an electrical signal output through electrochemical counter-circular years. When the concentration of nitrogen oxides is high, the output signal strength of the sensor is stronger; When the concentration is low, the output signal strength is weaker. The vehicle control system can adjust the operating state of the engine according to the signals output from the sensors, so that it can reduce nitrogen oxide emissions as much as possible.

There are two main types of nitrogen and oxygen sensors: thermocouple type and broadband type. The thermocouple sensor is the first sensor to be used in the vehicle exhaust control orange gear system, and its detection principle is to convert nitrogen oxides into electrical signal output through thermocouples.

The wideband sensor is a type of sensor that has been widely used in recent years, and its detection principle is to convert nitrogen oxides into electrical signal output through electrochemical reactions. Compared to thermocouple sensors, broadband sensors have higher accuracy and sensitivity and are able to detect nitrogen oxide levels in vehicle exhaust more accurately.

Overall, the NOX sensor is an important component in the vehicle exhaust control system, which detects the nitrogen oxide content in the vehicle exhaust to assist the vehicle control system in adjusting the exhaust gas, thereby reducing the environmental impact. There are two main types of nitrogen oxygen sensors: thermocouple type and broadband type, among which the broadband type sensor has higher accuracy and sensitivity. The development and application of nitrogen oxygen sensor is of great significance for promoting the development of vehicle exhaust control technology and reducing vehicle pollution to the environment.

If the oxygen sensor fails, the engine failure light will illuminate and fuel consumption will increase. Once the oxygen sensor fails, the computer of the electronic fuel injection system will not be able to obtain the information of the oxygen concentration in the exhaust pipe, so that it can not feedback and control the air-fuel ratio, which will increase the fuel consumption and exhaust pollution of the engine, and make the engine have unstable idling, lack of fire, surge and other faults. Therefore, it is necessary to troubleshoot or replace it in time.

Common faults of oxygen sensors.

1.Oxygen sensor poisoning: Oxygen-to-hail sensor poisoning is a common and difficult to prevent failure, especially for cars that regularly use leaded gasoline.

Even the new oxygen sensor will only work for a few thousand kilometers. If it is only a slight lead poisoning, then use a tank of unleaded gasoline to remove the lead from the surface of the oxygen sensor, so that it can work normally. However, due to the high exhaust temperature, lead invades its interior, hindering the diffusion of oxygen ions, making the oxygen transmission wheel number sensor ineffective and can only be replaced.

2.Carbon deposition: Due to poor combustion of the engine, carbon deposits are formed on the surface of the oxygen sensor, or deposits such as oil or dust enter the oxygen sensor, which will hinder or block the external air from entering the oxygen sensor, so that the first signal of the oxygen sensor is inaccurate, and the ECU cannot correct the air-fuel ratio in time.

Carbon deposition is mainly manifested in the increase of fuel consumption and the significant increase in emission concentration. At this point, if the sediment is removed, it will return to normal operation.

3.Ceramic fragments of the oxygen sensor: The ceramic of the oxygen sensor is hard and brittle, and may break and fail if hit by a hard object or blown by a strong air current. Therefore, you should be especially careful when dealing with it, and replace it in time if there is a problem.

If the oxygen sensor fails, the engine fault light will light up and fuel consumption will increase. 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. Therefore, it is necessary to troubleshoot or replace it in a timely manner.

Common faults of oxygen sensors.

1. Oxygen sensor poisoning: Oxygen sensor poisoning is a kind of fault that often occurs and is difficult to prevent, especially for cars that often use leaded gasoline, even if it is a new oxygen sensor, it can only work for thousands of kilometers. If only mild lead poisoning is masked, then a tank of unleaded gasoline can remove the lead from the empty surface next to the oxygen sensor and restore it to normal operation.

However, often due to the high exhaust temperature, the lead invades its interior, hindering the diffusion of oxygen ions, making the oxygen sensor fail, and then it can only be replaced.

2. Carbon deposition: due to poor combustion of the engine, carbon deposition is formed on the surface of the oxygen sensor, or deposits such as oil or dust enter the oxygen sensor, which will obstruct or block the external air from entering the oxygen sensor, so that the signal output of the oxygen sensor is inaccurate, and the ECU cannot correct the air-fuel ratio in time. Carbon deposition is mainly manifested in the increase in fuel consumption and a significant increase in emission concentration.

At this point, if the sediment is removed, normal work will be restored.

3. Oxygen sensor ceramics are broken: The ceramics of oxygen sensors are hard and brittle, and they may be broken and invalid when knocked with a hard object or blown with a strong air flow. Therefore, special care should be taken when dealing with it, and the questions should be replaced in time if they are found. (Photo by Li Linwei) @2019

The form factor of this relay is as follows:1. Shape and slag elimination material: Nitrogen oxygen sensor relays usually adopt rectangular or square shell shapes.

The shell is usually made of plastic or metal materials, such as Niruzhilong, polyester resin, aluminum alloy, etc.

2. Identification and logo: The relay is printed with the manufacturer's trademark, model, electrical parameters or other signs and logos for easy identification and identification.

3. Connector: The relay is usually equipped with a connector for the connection between the fiber and the vehicle's circuit system. Connectors have a specific shape and number of pins in order to properly connect to the vehicle's electrical interface.

An oxygen sensor is mounted on the exhaust pipe to measure the oxygen concentration in the exhaust gas. How it works is; In the form of voltage signal to the computer, the computer corrects the amount of fuel injection, so that the mixture concentration always maintains the theoretical air-fuel ratio under normal working conditions, only in this way can the three-way catalytic converter have the highest conversion rate of CO, HC and NO in the engine exhaust, so as to achieve the purpose of exhaust purification.