Q&A: Just ask the experts who can drive the engine to 5,000 rpm when driving on the road?

Just ask the experts who can drive the engine to 5,000 rpm (regardless of which gear) when driving on the road? From your question, I can see your deep prejudice and malice towards Chinese experts. First of all, let me say that I am not an expert, but I respect experts very much. All experts, no matter what comments they have made, cannot deny their attainments in their professional fields. There are many things that we think are common sense, but in the eyes of experts, they are a joke. Therefore, the opinions of experts and the policies formulated based on expert suggestions have rigorous theoretical basis and have been tested in practice.

Let’s talk about your problem. I know your question is about the annual vehicle inspection system. When detecting engine exhaust, you need to increase the engine speed to a relatively high level. You feel distressed watching from the side and worry about damaging the car. So you said: When I drive, the engine speed never exceeds 2,000 rpm. Why do you use 5,000 rpm to test? Isn't this destroying the car? Why do these experts develop such testing methods? If you ask me, just check the emissions at idle speed or 2,000 rpm.

You are really using your ignorance to challenge other people’s ability to eat. It can be judged from your remarks that your education level will not exceed nine years of compulsory education. Because it is impossible for China's higher education to cultivate idiots like you who are ignorant and disrespectful of teachers. Regardless of whether you can understand it or not, let me first popularize the car exhaust detection methods: gasoline engines use the dual idle method and simple steady-state operating condition method, and diesel engines use the free acceleration method and the loading deceleration method. Both methods require the engine speed to be adjusted. Raise it to more than 70% of the rated speed, and detect the exhaust emissions and engine output power at this time. If the exhaust gas composition is qualified in this case, it can be determined that the engine emissions are qualified under all operating conditions.

You may say: When I usually drive, the engine speed never exceeds 2,000 rpm. Most of the time it is idling. Why do you want to test the emissions at 5,000 rpm? Why not test emissions at idle and 2,000 rpm? This is really ignorant people saying ignorant things. Let me ask you: When you were in school, did your physical education test test your walking speed or your running speed? You may say that I usually walk and rarely run. And do you see who is jogging on the street? Why do you still need to take the running test? This is because running can bring out your greatest potential and test your ultimate abilities. If you are qualified in this state, you will naturally be qualified in a normal state; if you are unqualified in this state, it means that you are unsound in some aspects and need to be strengthened or treated.

The same is true for annual car inspections. It tests the car's ultimate capabilities, not its daily driving capabilities. You can use the powerful extreme capabilities of a car, but you can't live without it, and just because you don't use it doesn't mean that others won't use it either. For example, you never have to brake suddenly, so you say you don’t need to test my brakes, and I don’t need to anyway. But what if one day you suddenly encounter an emergency and need to brake suddenly, and your brakes don't work? If a fault is detected during the annual inspection, wouldn't it be possible to avoid this situation if you repair it in time? And if you drive on the road in this situation, it will also be a threat to other pedestrians and vehicles. From the perspective of public safety, you will not be allowed to do this.

Some people say that the car is idling a lot of the time. Why not test the emissions during idling? Let me tell you a fact: Almost all fuel engines have unqualified exhaust emissions at idle speed. Because idle speed is the worst working state of the engine, the fuel in the engine is incompletely burned and the combustion state is extremely unstable. The exhaust emissions at this time are the worst. When the engine is running at medium to high speeds, the fuel is fully burned in the engine, the combustion state is stable, and the exhaust emissions are the best. Therefore, it makes sense to increase engine speed by detecting engine exhaust gas. This detection method is not only used in China, but also all over the world. Can you say that experts all over the world are wrong? Let me say it again: Please don’t use your ignorance to challenge other people’s ability to eat! If one day we throw you on an uninhabited island and ask you to survive in the wilderness, you will thank us for our nine-year compulsory education!

This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.