Turbocharger is a common automotive power enhancement device that increases the output power of the engine by compressing intake air. The working principle of a turbocharger is to use the energy of the engine exhaust airflow to drive the turbine rotor, transferring the rotational kinetic energy to the compressor, allowing compressed air to enter the engine. Therefore, the turbocharger only starts when the engine is running, and it is not always working.

The start and stop of the turbocharger are controlled by the engine control system. When the engine speed is low, the rotor speed of the turbocharger is slow and cannot provide sufficient intake pressure, so the turbocharger will not start. As the engine speed increases, the energy of the exhaust airflow also increases, and the speed of the turbocharger also increases, providing more intake pressure. When the engine speed reaches a certain value, the turbocharger will reach its maximum speed, and the intake pressure will also reach its maximum value. When the engine speed decreases, the speed of the turbocharger also decreases, and the intake pressure also decreases accordingly.

In addition to the engine control system, turbochargers also require lubrication and cooling systems to maintain normal operation. The lubrication system is used to lubricate turbine bearings and compressor bearings to reduce friction and wear. The cooling system is used to dissipate the heat generated by the turbocharger to maintain its normal operating temperature.

In short, turbochargers are a very important automotive power enhancement device, and their operation is closely related to the engine speed. They require the synergistic effect of the engine control system, lubrication system, and cooling system in order to function properly. It only starts when the engine is running, and it also stops when the engine stops working.