Usually, we should also pay attention to the maintenance of related parts to avoid excessive exhaust gas caused by aging.
The unqualified exhaust emission is a problem of engine oil and vehicles. There is a paper in the magazine Chemical Management, which mentioned the cause analysis and control countermeasures of vehicle exhaust emission exceeding the standard.
Some cars are not up to standard, and when some cars leave the factory, in order to save costs, the exhaust emission itself is not up to standard.
There is a paper in China Environmental News that the responsibility for exceeding the standard of automobile exhaust gas lies in that people are not in the car.
Some new cars just bought also have the problem of excessive exhaust gas. Through inspection, it was found that the car was not equipped with an exhaust gas purification device at all.
Some people just want to be cheap, so they buy these cars with birth defects.
But this is a minority after all. Most of our friends buy cars from regular 4S shops, and the procedures and documents are complete, so there is no such problem.
The quality of oil is uneven. Let's talk about oil. The quality of petroleum products also has an impact on exhaust emissions.
Just like: whether we eat hot pot, roast chicken and kebabs today, or whether we eat pickled mustard tuber and salted eggs with porridge will affect our experience in the bathroom in the next few days, right?
Journal of China Academy of Sciences, high level? There is a paper "Economic Analysis on the Impact of China Oil on Automobile Exhaust Emission and its Upgrade".
Sulfur content is one of the main environmental protection indicators of oil products, because the city standards are different, and the sulfur content of oil products in different cities is also different.
The paper also made a survey: in 20 13 years, 180 oil samples were collected in 8 major cities including Beijing, Shanghai, Guangzhou, Chongqing, Xi, Wuhan, Changchun and Urumqi.
So: even if you add oil at a regular large gas station, there may be differences.
Small gas stations are certainly not as good as large gas stations in terms of oil product supervision, and their quality is uneven.
In the investigation, the sulfur content of gasoline samples collected by some small gas stations except PetroChina and Sinopec is obviously high.
What's the highest? 1500ppm, which is 50 times that of Beijing oil products. I can understand if it exceeds the standard.
Car and oil are qualified, why is the exhaust emission unqualified? Body parts are really aging and need maintenance. Besides, the car was bought in a regular 4S shop, and the oil was officially added in "two barrels of oil". The exhaust emission is still unqualified, and it is not impossible for the car to have problems.
Do you need to drive more than 65438+ 10,000 km for the first inspection in six years? Less, 50 thousand kilometers or 60 thousand kilometers? Some parts have indeed reached the service life, and they still need to pay attention to daily maintenance.
For example, some old drivers drive for a long time, and their physical strength may not be as good as when they were young.
There is a paper in Hebei Agricultural Machinery magazine, which reads "How to pass the annual inspection of exhaust emissions of old cars".
Simply put, it is really similar to what we eat.
"Incorrect air-fuel ratio" means that there is something wrong with the food, "insufficient combustion" means that the mouth is not chewy, and "three-way catalyst failure" means that the stomach and intestines are no longer working and the digestion and absorption capacity is out of order.
Therefore, when driving daily, you need to pay attention to the maintenance cycle of each component.
For example, when a car travels to 800 to 65438+ 10,000 kilometers, the oxygen sensor is easy to fail.
Spark plug and three-way catalyst, as we talked about in the video before: the life of nickel alloy spark plug is about 20,000 to 30,000 km, and the life of three-way catalyst exceeds1.30,000 km.
Didn't anyone in the 4S shop say, "You should have a maintenance." You really believe that. Face the manual.
There is something wrong with the annual inspection process, so you can try some tips. But sometimes, even if there is nothing wrong with our car, there will still be exhaust gas detection, perhaps the annual inspection process itself is not necessarily correct.
For example, there is no chance to give you a hot car during the annual inspection, and the three-way catalyst can't work normally, and the measured exhaust gas must exceed the standard.
"Hebei Agricultural Machinery" magazine especially likes to write this kind of thing, and there is a paper on it, "Failure Causes and Detection Methods of Automobile Three-way Catalytic Converter".
The catalytic reaction process will produce a lot of heat energy. If the operating temperature is very high, exceeding 1000℃, the catalytic converter will also fail.
Therefore, before the annual inspection last year, we can consider pulling the high speed first, or pulling the high speed first to keep the three-way catalyst at the normal working temperature, so as to at least play its due role.
The unqualified exhaust emission is mainly caused by vehicles and oil products. To sum up, the unqualified exhaust emission is mainly caused by vehicles and engine oil.