The principle of automobile exhaust pipe spraying fire;

Some modified cars, direct exhaust and exhaust systems are short. In order to increase horsepower, fuel injection is often increased. When the engine speed is high, if the dense oil and gas are not completely burned in the cylinder, they will be discharged from the engine, and then continue to explode and burn after being discharged from the engine. In this case, the flame can be seen in the exhaust pipe.