The performance improvement for the front attachment belt drive train is:

1. Reduce belt vibration
2. Reduce belt tension
3. Reduce the tensioning stroke of the belt tensioner
4. Improve belt life
5. Reduce the noise of the belt drive
6. Increase the speed of the alternator when the engine is idling
7. Improve the belt drive noise and slippage of the generator when the car shifts.

In addition, when the gearbox is added or downshifted, the impact is not strong, and the response is faster and slower. The idling jitter and the lightness of the sound can improve the driving experience. The engine speed is less than 2000 rpm. In the case of a minute, the alternator one-way pulley can decouple the generator moment of inertia from the engine front attachment belt system. Whether the decoupling function of the one-way pulley depends on the load of the engine (the amplitude of the torsional vibration), the moment of inertia of the generator and the load. In addition, the one-way pulley also decouples the generator moment of inertia when the car shifts the engine speed.