Under what circumstances does the right exhaust of the BMW X5 open?

[OElisa]

The right exhaust of the BMW X5 automatically opens when the engine speed is high. Function of the exhaust system: It mainly ensures that the water and exhaust gases produced after fuel combustion can be discharged, providing favorable conditions for the next combustion. The BMW X5's exhaust system uses a variable valve, so when the engine speed is relatively low, the valve closes, allowing the airflow to pass through a smaller pipe diameter and be discharged through a single pipe. Introduction to the exhaust pipe valve: The car's exhaust system cannot blindly pursue smoothness because backpressure is related to the engine's low-speed torque, which is the torque range most commonly used in daily driving. Therefore, the exhaust system must have corresponding devices to ensure backpressure at low speeds, and this is where the backpressure muffler comes into play.