Serpentine drive system with improved over-running alternator decoupler

摘要

The serpentine belt drive system comprises a drive assembly including an internal combustion engine having an output shaft with a driving pulley on it rotatable about a drive pulley axis. A sequence of driven assemblies each has a driven pulley rottable about an axis parallel with the driving pulley axis and a serpentine belt mounted in co-operating relationship with the driving pulley and with the driven pulleys in a sequence which corresponds with the sequence of the driven assemblies when related to the direction of movement of the belt to cause the driven pulleys to rotate in response to the rotation of the driving pulley. The sequence of driven assemblies includes an alternator assembly including an alternator shaft mounted for rotation about a shaft axis. A hub structure is fixedly carried by the alternator shaft for rotation with it about the shaft axis. A spring and one-way clutch mechanism couples the alternator pulley with the hub structure.