The present invention relates to a decoupler with free wheel
system and comprising a vibration damping
pulley, a shaft actionable by the
pulley, hub pieces having a first hub piece and a second hub piece, hub pieces being mounted between the inner race of the
pulley and the outer surface of the shaft, at least one journal element between the shaft and pulley, along with a
torsion spring, and a
clutch spring, with the first hub piece being mounted on the shaft and the second hub piece being mounted around the shaft and can rotate relative to it, the
torsion spring being disposed between the outer race of the hub pieces and the inner race of pulley, having a first end operatively attachable to the pulley and a second end operatively attachable to the second hub piece and the
clutch spring being disposed internally in relation to the
torsion spring and which is frictionally engaged with the hub pieces for transmission of torque to the shaft.