Patent ID: 11933390
Assignee: ALLISON TRANSMISSION, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A multiple speed transmission, comprising:
an input shaft;
an output shaft;
a first planetary gearset having a first member, a second member, and a third member;
a second planetary gearset having an input member, a reaction member, a second member, and a third member, wherein the second member comprises a first portion and a second portion;
a plurality of interconnecting members each connected between at least one of the first and second planetary gearsets and at least another of the first and second planetary gearsets;
a first torque-transmitting mechanism selectively engageable to interconnect the input shaft with the first member of the first planetary gearset;
a second torque-transmitting mechanism selectively engageable to interconnect the input shaft with the third member of the first planetary gearset and the second member of the second planetary gearset;
a third torque-transmitting mechanism selectively engageable to interconnect the third member of the first planetary gearset and the second member of the second planetary gearset with a stationary member;
a fourth torque-transmitting mechanism selectively engageable to interconnect the third member of the second planetary gearset with the stationary member; and
a fifth torque-transmitting mechanism selectively engageable to interconnect the reaction member of the second planetary gearset with the stationary member;
wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two;
wherein, the selective engagement of two of the first, second, third, fourth and fifth torque-transmitting mechanisms establishes X number of forward speed ratios and Y reverse speed ratios between the input and output shafts;
wherein, the first portion and second portion of the second member are coaxial and rotationally locked to one another;
wherein the second portion of the second member of the second planetary gearset is directly coupled to the reaction member of the second planetary gearset.