Filtering pulley assembly for a belt drive

A filtering pulley assembly for an accessory drive of a vehicle, comprising:

• a hub adapted to be fixed to a rotating shaft,
• a pulley mounted coaxial and freely rotating on said hub,
• an actuator disc carried by the hub,
• a plurality of elastic assemblies interposed between the pulley and the actuator disk,
• a torque limiting coupling configured to rotationally connect the actuator disc to the hub, when the torque is below a predetermined threshold value, and to decouple the actuator disc from the hub, when the torque is above the threshold value, and
• a damping assembly for damping the relative oscillations between the hub and pulley,
• wherein said damping assembly defines different damping values depending on the direction of relative rotation between the hub and the pulley.