Abstract: In an aspect, a decoupler is provided for mounting to a shaft and engaging a belt for transmitting power between an engine and an accessory in a vehicle. The decoupler includes an input member and an output member. One of the input and output member engages the belt. A wrap spring clutch and an isolation spring are positioned to transfer torque in series between the input and output members. A carrier is positioned to hold an end of the wrap spring clutch and an end of the isolation spring to permit torque transfer therebetween. The wrap spring clutch is positioned to transfer torque between the isolation spring and one of the input member and the output member. The carrier is supported on a support surface that is fixed to said one of the input member and the output member.

Abstract: In an aspect, a decoupler is provided, comprising a hub defining an axis, a pulley, a one way clutch and an isolation spring that act in series, a damping member that frictionally engages a friction surface the pulley or the hub, and a biasing member that urges the damping member into the friction surface. The biasing member has a mounting portion having an axially extending first mounting surface that is fixedly engaged with a second axially extending mounting surface on the other of the pulley and hub and an engagement portion resiliently connected to the mounting portion by a transition portion having at least one bend that urges the engagement portion into engagement with the damping member with a selected force. The at least one bend resiliently permits axial movement of the damping member engagement portion independent of the mounting portion.

Abstract: In an aspect, a decoupler is provided, comprising a hub defining an axis, a pulley, a one way clutch and an isolation spring that act in series, a damping member that frictionally engages a friction surface the pulley or the hub, and a biasing member that urges the damping member into the friction surface. The biasing member has a mounting portion having an axially extending first mounting surface that is fixedly engaged with a second axially extending mounting surface on the other of the pulley and hub and an engagement portion resiliently connected to the mounting portion by a transition portion having at least one bend that urges the engagement portion into engagement with the damping member with a selected force. The at least one bend resiliently permits axial movement of the damping member engagement portion independent of the mounting portion.