Patent ID: 11867266
Assignee: ALLISON TRANSMISSION, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 15:
16. A transmission comprising:
at least one stationary member;
an input member rotatable relative to the at least one stationary member;
a plurality of planetary gearsets operatively coupled to the input member, each of the plurality of planetary gearsets including a first gearset component, a second gearset component, and a third gearset component, the plurality of planetary gearsets including a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset, each of the first planetary gearset, the second planetary gearset, the third planetary gearset, the fourth planetary gearset, and the fifth planetary gearset is a simple planetary gearset;
an output member operatively coupled to the input member through the plurality of planetary gearsets and rotatable relative to the at least one stationary member; and
a plurality of selective couplers operatively coupled to the plurality of planetary gearsets, the plurality of selective couplers are selectively engaged in a plurality of combinations to establish a first number of forward speed ratios and a second number of reverse speed ratios between the input member and the output member, the plurality of selective couplers including a third number of brakes and a fourth number of clutches, the third number is odd and two more than the fourth number, and the plurality of selective couplers including:
a first selective coupler which, when engaged, fixedly couples the third gearset component of the first planetary gearset and the first gearset component of the second planetary gearset to the at least one stationary member; and
a second selective coupler, which, when engaged, fixedly couples the input member to the third gearset component of the fifth planetary gearset and the first gearset component of the first planetary gearset.