What is the reason for the exhaust pipe of a car to explode when going downhill? What is the reason for the exhaust pipe to explode when the car is driving?

The exhaust pipe of a car is used to discharge the exhaust gas produced by the combustion of gasoline. The color of the exhaust pipe smoke can be used to determine whether the exhaust pipe is normal. Sometimes the exhaust pipe of a car will make a popping sound while it is driving. What is the reason for this?

What is the reason for the exhaust pipe of a car to explode when going downhill?

Generally, you need to reduce the throttle when going downhill. If there is a noise in the exhaust pipe in this case, it is mostly because the mixture is too lean, and it is not completely burned in the cylinder, and then enters the exhaust pipe for secondary combustion causing the noise. It is also possible that the oxygen sensor or other device is broken and caused a malfunction.

Backfire can be understood as the secondary combustion of excess mixture in the high-temperature exhaust manifold, so the cause is too much oil or incomplete combustion. Weak ignition energy, leaking fire or incorrect ignition angle can also cause this problem, and in severe cases, it may even burst into flames.

What is the matter with the car exploding while driving?

This problem may occur for two reasons: first, the ignition high pressure of a cylinder of the engine may be misfired. Due to the misfire of individual cylinders, the unburned mixture is discharged into the exhaust pipe; second, the gear is not selected appropriately when going downhill, so that the mixture entering the cylinder is too rich and is not completely burned and discharged into the exhaust pipe. When the cylinder is working, the exhaust temperature is above 700 degrees Celsius, which ignites the unburned high-concentration mixture in the exhaust pipe, causing deflagration and a sound like a cannon. If this phenomenon occurs for a long time, you should go to the 4S shop for inspection and repair.

What's the matter with the car exhaust pipe exploding?

In simple terms, when the vehicle is going uphill or on a flat road, the engine, as a power source, transmits power to the wheels, and the wheels receive the power. When going downhill, when using the engine's traction to slow down, the power transmitted by the engine is not as strong as the force of the car's gravity going down the slope, and this force is used as power to drive the engine. This will cause the engine's mixed gas to burn incompletely, and the incompletely burned mixed gas will burn again in the exhaust pipe, making a popping sound.