ACCESSORY DRIVE DECOUPLER

摘要

Assemblies for selectively coupling torque between rotating components and belt drive systems including the same are disclosed. The assembly includes a rotatable input member and a rotatable output member operatively connected to one another by a one-way clutch for rotation together in a predominant direction. A spring is included in the assembly with a first end thereof engaged to the one-way clutch and a second end thereof engaged to the rotatable input member. The spring has no preload in an unengaged position of the one-way clutch and rotates with the rotatable input member during a positive torque condition to rotate a component of the one-way clutch to activate the one-way clutch into an engaged position. Then, when the one-way clutch is in the engaged position, the spring radially expands and thereby provides isolation between the rotatable input member and the rotatable output member.