The mechanical supercharger is driven directly by the engine crankshaft through a belt. It uses its own power to drive the compressor to compress air, thereby increasing the engine's intake volume and power. Its power output is linear and smooth, without power lag. It has sufficient torque at low speeds, and performs well in starting and low-speed acceleration. However, it consumes a portion of the engine's power. The efficiency at high rotational speeds is relatively low. The overall fuel consumption and maintenance costs are relatively higher. It is mainly used in large-displacement luxury cars and high-performance models.