Really can't find the steel ball stuffed in the exhaust pipe?

I believe that everyone has seen a joke on the Internet. "In the face of people who park indiscriminately, we must solve the problem by civilized means, such as blocking the exhaust pipe with steel balls and blocking the 502 water outlet." Of course, this is just a joke, and we still can't do it in this case. However, for some curious people, do you really want to know whether the steel ball is stuffed into the exhaust pipe? In fact, the steel ball plug exhaust pipe is easy to find. If the exhaust pipe is blocked, the engine work will be greatly affected, and usually it will be turned off directly. If the exhaust pipe is blocked when parking, the car can't start at all. Steel balls are hard to get stuck in the exhaust pipe. Here we are going to talk about a concept called exhaust reflux. Exhaust backpressure means that the exhaust pipe through which the exhaust gas passes can finally be discharged from the exhaust pipe to the atmosphere. If the unfinished exhaust gas is still in the exhaust pipe, it will cause greater exhaust pressure to the next exhaust gas of the engine. Coupled with the friction between the exhaust gas and the pipe wall, the pressure in the exhaust pipe will be higher than the external atmospheric pressure. This difference is the value of exhaust back pressure. The exhaust back pressure of our car can reach about 35kp at 1000 rpm. If the exhaust port is 10cm, the exhaust pressure in the exhaust pipe can reach above 300 N, and the steel balls blown out are more than enough. If the steel ball is really stuck in the exhaust pipe and can't get out, it will have a great impact on the car. If the exhaust gas can't get out, less air will be inhaled, the inflation efficiency of the car will be reduced, and the power and torque output by the engine will also be reduced, leading to accelerated fatigue and jitter of the car. So the next time you find that the car is unable to accelerate, you can check whether the exhaust pipe is blocked.