Isolator decoupler

An isolator decoupler comprising:

• a shaft;
• a pulley journalled to the shaft;
• a clutch carrier journalled to the shaft through a one-way clutch;
• a torsion spring engaged with the pulley and the clutch carrier;
• a thrust bushing connected to the pulley and disposed between the clutch carrier and the shaft, the thrust bushing comprises a stop;
• the clutch carrier comprises a stop that is cooperatively engageable with the thrust bushing stop to limit a relative rotation of the clutch carrier with respect to the pulley such that during a load release condition the torsion spring will not disengage from the clutch carrier;
• the torsion spring loadable in an unwinding direction;
• the torsion spring and the pulley having a predetermined clearance between a torsion spring outside diameter surface and a pulley inside diameter surface;
• and
• whereby the torsion spring outside diameter surface and a pulley inside diameter surface come into a progressive frictional engagement by torque load dependent radial expansion of the torsion spring.