Patent ID: 11898617
Assignee: ALLISON TRANSMISSION, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 18:
19. A torsional damper assembly for use in a vehicle powertrain, the torsional damper assembly comprising:
an input-side damper body rotatable about a rotational axis and having a first ramp arrangement, wherein the first ramp arrangement includes a plurality of input lobes and a plurality of input valleys, wherein each input valley is defined between a corresponding pair of the input lobes; and
an output-side damper body rotatable about the rotational axis and coupled to an output shaft that extends along the rotational axis, the output-side damper body having a second ramp arrangement that includes a plurality of output lobes and a plurality of output valleys, wherein each output valley is defined between a corresponding pair of the output lobes,
wherein the output-side damper body is configured to move axially along the rotational axis between (i) a first engagement position at which a crest of each input lobe of the first ramp arrangement is fully received in a corresponding output valley of the second ramp arrangement and a crest of each output lobe of the second ramp arrangement is fully received in a corresponding input valley of the first ramp arrangement and (ii) a second engagement position at which the crest of each input lobe of the first ramp arrangement is only partially received in the corresponding output valley of the second ramp arrangement and the crest of each output lobe of the second ramp arrangement is only partially received in the corresponding input valley of the first ramp arrangement, and
wherein the input-side damper body further includes a pilot shaft extending along the rotational axis toward the output-side damper body and the output-side damper body further includes a pilot bushing and wherein the pilot shaft of the input-side damper body is engaged with the pilot bushing of the output-side damper body.