Although there is no definite evidence, the cause of the fire is improper operation by the inspector. However, in the joint inspection, it can be said that the throttle "ah" 5000 laps is a daily basic work, and everyone does it. In fact, the purpose of joint inspection is to check the exhaust gas at 5000 rpm. Some people say that the tail gas detection of vehicle inspection institute is based on the national standard GB 18285-20 18, which is mandatory according to relevant laws and regulations. There are four methods and standards for exhaust emission detection stipulated in the standard case: double idle speed method, steady construction method, transient method and simple transient method.

The "violent annual inspection" in the mouth of the owner's friend refers to the shorthand of twins. There is a paper in the Journal of Automobile Maintenance, which says "Analysis of Standardized Operation of Double Idle Check". The working stage of double idle speed method is as follows: the engine accelerates from idle speed to 70% of rated speed, and then decreases to high speed after working for 30 seconds. Rated speed is the maximum speed that the engine is not allowed to exceed, near the red line of the engine. The average private car's Hongkou speed is 7000, 70% and 4900 rpm. When the inspector's feet shook, he stepped on more than 5000 feet when he made a mistake. People can't stick it so accurately. Every car is different.

This test has certain scientific basis. There is a paper in Journal of Nanjing Institute of Technology that ranks "emissions of gasoline vehicles under acceleration and double idle conditions: * * and differences". In the case of double idle speed, from high speed to idle speed, the speed decreases and the emission increases. In other words, the emissions at double idle speed are higher than usual. If the emission of this car can meet the standard, it can also meet the standard under high-quality working conditions. This is equivalent to evaluating a person's psychological quality. It's not his usual performance, but an unexpected situation. I was calm when I pointed a knife at him and pushed him. You can keep calm under this high pressure. Usually this person doesn't panic, where he will go.

It is reported that the exhaust gas detection method needs to be enforced by the state, and there are also standard implementation procedures. But most car owners see their cars "Ang", and I can't bear to step on them myself. How could you? I can only feel a little distressed. It's like a child at home, raising a noble lady, which the emperor keeps and holds in his own hands. During military training, I stood still, didn't drink water, didn't eat, and staggered in the sun, as if I were going to faint. Under normal circumstances, the annual inspection does little harm to the car, but it does more psychological harm to the owner. Some car owners don't even want their wives to let others drive their cars, so people they don't know step on them, right? Cars are not as fragile as we thought. As we said before, you can't step on the gas pedal badly. The car damaged in the joint inspection may be due to its poor condition. Cancer, hidden disease, your car broke down when you stepped on the highway during the inspection.