How much temperature is the temperature resistance of the automotive oxygen sensor leads

There are two types of oxygen sensors in practical applications: zirconia oxygen sensor and titanium oxide oxygen sensor. The common oxygen sensor is divided into single lead, double lead and three leads; The single-lead one is a zirconia oxygen sensor; The two-lead is a titanium oxide oxygen sensor; The three-lead oxygen sensor is a heated zirconia type oxygen sensor, and in principle, the oxygen sensor with three lead methods cannot be replaced.

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.

Oxygen sensor poisoning is a frequent and difficult failure to prevent, especially in cars that often use leaded gasoline, and even a new oxygen sensor can only work for a few thousand kilometers. If there is only a mild case of lead poisoning, a tank of lead-free gasoline can remove the lead from the surface of 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.

In addition, silicon poisoning of oxygen sensors is also common. Generally speaking, the silica produced after the combustion of the silicon compounds contained in gasoline and lubricating oil, and the silicone gas emitted by the improper use of the silicone rubber gasket will make the oxygen sensor fail, so it is necessary to use the best fuel and lubricating oil. When repairing, it is necessary to select and install a rubber gasket correctly, and do not apply solvents and anti-sticking agents other than those specified by the manufacturer to the sensor.

The cleaning method of the oxygen sensor is as follows:

Remove the oxygen sensor and add excess hydrochloric acid with 5-10% ferric chloride solution, depending on the surface of the sensor head. Put the oxygen sensor into the solution and soak it, take it out after 10-15 minutes, rinse it with water, not only the four holes around it should be unobstructed, but also observe from the bottom, and the carrier inside is white after washing.

If the cleaning is not satisfactory, continue the work until you can see the white carrier.

As for the smell, I won't smell it myself, anyway.

The resistance value of the automotive oxygen sensor is generally between, and the fluctuation amplitude of the rear oxygen will be smaller than that of the front oxygenHowever, the value of the oxygen sensor will be different for each brand, model, year, and emission requirements.

Collect the speed of the car to judge whether the car has signs of skidding, so there is a sensor that collects the wheel speed of the car to complete this work, which is generally installed on the hub of each wheel, and once the sensor is damaged, the ABS will fail;

How it works. Oxygen sensors work similarly to batteries, with the zirconia element in the sensor acting like an electrolyte. Its basic working principle is: under certain conditions (high temperature and platinum catalysis), the oxygen concentration difference between the inside and outside of the oxidation Hao is used to produce a potential difference, and the larger the concentration difference, the greater the potential difference.

The resistance value of the automotive oxygen sensor is 4-40 (refer to the specific model manual).

The resistance value of the front oxygen spring rental sensor of the car is normal between 4 40 and the voltage value is normal. A resistance value between 10 and 100 is normal.

The resistance value of the automobile oxygen sensor will generally be between, and the fluctuation amplitude of the rear oxygen will be smaller than that of the front oxygen, but each brand, model, year, and emission requirements are different, and the value of the oxygen sensor will be different, depending on what model you are.

Oxygen sensors are standard in cars and utilize the NERNST principle. It is a measuring element that uses ceramic sensitive elements to measure the oxygen potential in the exhaust pipe of automobiles, calculates the corresponding oxygen concentration by the principle of chemical equilibrium, and monitors and controls the combustion air-fuel ratio to ensure product quality and exhaust emission standards. It has the advantages of simple structure, quick response, easy maintenance, convenient use and accurate measurement.

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 to CO, HC and NOx will drop sharply, so the 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 that the air-fuel ratio of the mixture is controlled near the theoretical value.