The annual inspection of automobiles is constantly controversial, and the call for canceling the annual inspection is getting louder and louder. Why do car owners dislike the annual inspection so much

The annual inspection of automobiles is constantly controversial, and the call for canceling the annual inspection is getting louder and louder. Why do car owners dislike the annual inspection so much?

The annual inspection is a very painful thing for car owners, especially in the exhaust gas inspection project. The inspector's operation is as fierce as a tiger, and the speed of one foot is 5,5. Do you think it is harmful?

let's start with what methods are used for tail gas detection?

generally speaking, single idle speed, double idle speed and simple transient condition method are adopted for tail gas detection. However, the single idle speed detection method has been eliminated because of inaccurate detection. Double idle speed and simple transient condition method are commonly used methods for exhaust gas detection at present, in which simple transient condition method evolved from transient condition method, and the data obtained is more accurate, but the cost is also relatively high.

the specific operation method of double idle speed method is as follows: when the car is at idle speed, the inspector will raise the speed to 7% of the rated speed with one foot throttle, keep it for 3s, and then read the data, and then read the data from the high speed to the idle speed, and finally take the average value between the two to get the test result.

when testing the exhaust gas, will the speed definitely soar to more than 5, rpm

For car owners, if they have experienced the annual inspection, they must know that in the exhaust gas testing project, the speed will soar as hard as possible, which will not only hurt the car, but also accelerate the scrapping of the car.

A rider once told me that in the annual inspection, cars enter the scrap factory instead of the inspection hall. In addition, after individual riders rolled off the assembly line, the fault lights were inexplicably all on, which caused the owners to complain.

However, when testing, the speed doesn't have to be 5 rpm. As I said above, it is usually 7% of the rated speed. Theoretically, it doesn't do any harm to the car.

however, in the owner's view, even if it doesn't reach 5 rpm, it will do some harm to the car. At present, the maximum speed limit of high speed is 12km/h, and the maximum speed of the car is about 125 km/h. Can the speed and rotation speed reach this high? It is impossible at all, so when testing, it must be harmful for the inspector to step on the accelerator violently.

most car owners are particularly disgusted with the annual inspection because it hurts their cars now.