Eye closure brand is committed to transforming the exhaust pipe of the car to a nearly perfect level, and strictly controls every link when modifying the exhaust pipe. This is one of the concepts that have been quoted from Germany and is also the modification of the technology brand. It cares about the direction that every user thinks is eye closure modification, and will explain the technology related to the modification direction to the owner in detail, which is one of the reasons why eye closure has always cited German technology.
As far as China is concerned, 20 million old cars need to improve their oxygen sensors in the past three years, and more than 2 million oxygen sensors are needed for new cars every year. There are dozens to nearly a hundred sensors installed in an ordinary family car, and there are more than 200 sensors in luxury cars. It is reported that in 2000, the automobile sensor market was 665,438+700 million US dollars (904 million products), and it will reach 8,450 million US dollars (654,38+268 million products) in 2005, with growth rates of 6.5% (in US dollars) and 7.0% (in products) respectively. Therefore, from the perspective of oxygen sensor (oxygen probe), the research focus of oxygen sensor materials should be in the following aspects:
(1), study and improve the protective layer material, improve the anti-deterioration ability and enhance the air permeability.
Gasoline and engine oil contain impurities such as lead, sulfur and phosphorus, which will greatly reduce the performance of the sensor, while dust, oil, silicon and other components will block the protective layer and electrodes of the sensor. Therefore, it is necessary to improve the protective layer material to improve the anti-degradation performance of sensor elements. The method adopted is to use materials with good adsorption effect and catalysis to make impurities adsorb, gather on the protective layer and transform. At the same time, by adding suitable materials to improve the manufacturing process, the permeability of the protective layer is enhanced and the response time is shortened.
(2) Improve the environmental adaptability of oxygen sensor materials and prolong the service life.
The working environment of automobile oxygen sensor is very bad. When it works at the high temperature of 500℃ ~ 800℃, it is usually affected by the climate temperature of about 30℃. Therefore, expanding its working temperature range, especially its working stability and durability in the quotient temperature region, has become a direction of material improvement. At the same time, it is also a key problem to improve the reliability and anti-deterioration ability of the whole module under the condition of large temperature difference and rapid change. The commonly used method is to start with material additives to improve the high-temperature stability of electrode materials and sensitive materials, improve the process and improve the adhesion between electrodes and sensitive materials.
(3) Expand the measurement range of air/fuel ratio control. There is a certain direction to realize the measurement and control of wide-area air-fuel ratio.
In this way, the oxygen sensor can continuously measure and control the whole state of the air-fuel ratio from the over-rich area to the lean area (lean oil area), and realize the feedback control of the factory.
(4) Improve the accuracy of measurement and feedback signal, and enhance the feedback control ability of instantaneous change state.
The exhaust emission regulations in western developed countries are more and more strict, so it is required to continuously improve the accuracy of oxygen sensor measurement signals in order to improve the control ability. At the same time, the instantaneous change of exhaust gas also needs to be measured and corrected in time, so it has become a main direction to improve the properties of materials.
In a word, with the rapid development of China's automobile industry, the progress of automobile technology and the improvement of sensor manufacturing technology, the automobile oxygen sensor will be continuously improved and developed, and its development prospect is very broad.
Method for judging the quality of automobile oxygen sensor
1 observation method
It has been published here before, mainly by looking at the color of the oxygen sensor to judge the quality of the oxygen sensor.
2. Measure the resistance of oxygen sensor
Unplug the plug of the sensor, and measure the resistance of the two wires to see if it is normal within a proper range (generally around 3 or 5 ohms).
3. Car computer detector inspection
When the car needs to stop and warm up, the water temperature reaches 80 degrees. Check the voltage value of the oxygen sensor of the computer detector. It will constantly change from 0 V to1V. The faster the frequency, the better the sensor.
If the voltage is 0v or 1v, or there is no change, it means that the sensor is aging or working badly and needs to be replaced.