A filtering pulley having a hub adapted to be fixed to a rotating shaft, a pulley ring mounted coaxial and rotationally free on the hub, and a plurality of elastic assemblies arranged circumferentially with respect to the hub and the pulley ring and each interposed between a pair of first elements integral with the hub and between a pair of second elements integral with the pulley ring is disclosed. Each elastic element forms with the first elements and with the second elements respective angular clearances, and the pulley ring and the hub have a free angle of relative rotation equal to the sum of the above-mentioned angular clearances.

An isolator assembly includes a clutch configured to operate in a full locked condition and a slip condition. Additionally, the isolator assembly includes a damper and a centrifugal pendulum absorber (CPA). The damper is configured to reduce oscillation when the clutch is in one of the full locked condition and the slip condition. The damper includes a blade that is biasable. The CPA is coupled to the damper and configured to reduce oscillation when the clutch is in one of the full locked condition and the slip condition. A vehicle includes an engine and a transmission. The engine includes an output shaft and the transmission includes an input member. The vehicle includes the isolator assembly operable between the output shaft and the input member.

The disclosed invention is a novel method for constructing a Low Stiffness Torsional Spring-Damper that simultaneously yields the following advantages over conventional designs: (1) the elastomer is not mold-bonded to the two metallic extremities; (2) the amount of elastomer is relatively smaller compared to conventionally constructed devices; (3) the device only allows the torsional direction to be spring loaded; (4) there is some damping inherently present in the system; (5) the device does not disintegrate on failure of the elastomeric element; and (6) the device is serviceable in the field without disengaging from the rotating shaft. Such a Low Stiffness Torsional Spring-Damper when used in a Torsional Vibration Isolator or a Torsional Vibration Damper would reduce its cost while improving its structural and modal integrity and enabling its serviceability in the field.

The disclosed invention is a novel method for constructing a LSTSD that simultaneously yields the following advantages over conventional designs: (1) the elastomer is not mold-bonded to the two metallic extremities; (2) the amount of elastomer is relatively smaller compared to conventionally constructed devices; (3) the device only allows the torsional direction to be spring loaded; (4) there is some damping inherently present in the system; (5) the device does not disintegrate on failure of the elastomeric element; and (6) the device is serviceable in the field without disengaging from the rotating shaft. Such a LSTSD when used in a TVI or a TVA would reduce its cost while improving its structural and modal integrity and enabling its serviceability in the field.

An isolator assembly includes a clutch configured to operate in a full locked condition and a slip condition. Additionally, the isolator assembly includes a damper and a centrifugal pendulum absorber (CPA). The damper is configured to reduce oscillation when the clutch is in one of the full locked condition and the slip condition. The damper includes a blade that is biasable. The CPA is coupled to the damper and configured to reduce oscillation when the clutch is in one of the full locked condition and the slip condition.

A vehicle includes an engine and a transmission. The engine includes an output shaft and the transmission includes an input member. The vehicle includes the isolator assembly operable between the output shaft and the input member.

A torque transfer mechanism includes an input member to receive from a propulsion source, an input torque about an axis of rotation and an output member coupled to the input member to transfer the input torque to a downstream driveline component. The torque transfer mechanism also includes at least one clockspring to restrict relative rotation between the input member and the output member. The torque transfer further includes a mass plate coupled to the output member and configured to rotate about the axis of rotation. The torque transfer mechanism further includes a plurality of pendulum masses movably coupled to the mass plate wherein the clockspring is arranged to attenuate a first range of input torque vibration and a the plurality of pendulum masses are arranged to attenuate a second range of input torque vibration.

A filtering pulley having a hub adapted to be fixed to a rotating shaft, a pulley ring mounted coaxial and rotationally free on the hub, and a plurality of elastic assemblies arranged circumferentially with respect to the hub and the pulley ring and each interposed between a pair of first elements integral with the hub and between a pair of second elements integral with the pulley ring is disclosed. Each elastic element forms with the first elements and with the second elements respective angular clearances, and the pulley ring and the hub have a free angle of relative rotation equal to the sum of the above-mentioned angular clearances.