Many car owners are very envious of foreign car owners, their annual inspection system is relatively relaxed, as long as the car exhaust emissions meet the standard, decades of old cars can also be on the road. However, it is rare to see old cars older than 20 years old on domestic roads, and many cars that are more than ten years old are forced to scrap because of annual inspection. Car owners are not satisfied with the current annual inspection system of cars, and even call for the cancellation of annual inspections of cars.
Recently, a private car owner in Daqing, Heilongjiang, drove to the testing station for testing, and when waiting in line, the owner saw a white car in front of him being ravaged during the exhaust gas test, and felt distressed. After the staff got into the car, the vehicle began to roar, and with a burst of roar, the rear of the car began to emit frequent white smoke.
The owner of the car is lined up behind this white private car, watching this car being treated "violently" from a distance, and the owner is also very emotional. Then took out his mobile phone to take a small video, and said: "All said not violent inspection, look at this hard to bombard the accelerator ah, kick hard, not violent inspection, in the end when can cancel the violent inspection?" ”
Violent annual inspection has now become a very headache for many car owners, many car owners obviously feel that there is no problem with their cars, but the annual inspection is not passed, even if they pass the annual inspection, the parts of the vehicle may also have problems, some cars' engines even malfunction, the owner has to repair at his own expense.
There are also many people who question the car exhaust detection, is it really necessary to step on the throttle to 5000 rpm? The staff should collect the exhaust of the car, test the harmful substances in it, as long as the exhaust can be collected, there is no need to directly step on the floor oil every time.
Why do you have to step the throttle when you are testing for exhaust gas?
When inspecting vehicle exhaust gases, the working condition detection method is used in most cases. The staff should drive the car to the designated work machine, let the vehicle drive on the roller, simulate the exhaust emissions under various working conditions, and then judge whether the car meets the standards through the exhaust emissions.
The use of labor condition method to detect automobile exhaust needs to measure the exhaust emissions of the engine in each speed range, so the staff needs to increase the speed of the engine. If there is an idle value in the detection data, it may affect the passage of the vehicle's annual inspection.
If the exhaust of the car is detected, the staff gently presses the accelerator to maintain the speed at about 2000 rpm, the gasoline mixture in the engine may not burn enough, and it is easy to produce carbon deposits under such working conditions, and the exhaust emissions will be relatively high. For gasoline engines, 2500 to 4500 rpm is the best working speed, at which the engine burns more fully and the nitrogen oxide content in the exhaust gas will be relatively low.
When testing the vehicle, in order to prevent errors, the staff will generally step on the throttle to the end and raise the speed to 4000 to 5000 rpm.
Does the engine speed of up to 5000 rpm affect the vehicle?
In fact, for ordinary fuel vehicles, 4000 rpm or 5000 rpm is not a red line, if a foot of throttle to step on the speed to 6000 rpm, it is considered to have entered the red line area of the engine, this practice is more or less harmful to the engine.
Editor's Short Comment:
The car I bought, of course, I cherished it very much, and seeing the staff of the testing station stepping on floor oil every time, the owner's pain was inevitable. But now the method of exhaust gas detection is the working condition detection method, which needs to increase the engine speed, and the owner has no choice.
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