Patent ID: 11859715
Assignee: SIGMA POWERTRAIN, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 0:
1. A method for shifting a transmission from a drive state,
wherein the transmission includes at least one clutch, wherein the clutch includes a pocket plate having a plurality of pockets, a notch plate having a plurality of notches, at least one first strut housed within one of the pockets of the pocket plate in a first orientation, at least one second strut housed within another of the pockets of the pocket plate in a second orientation, at least one first actuator for actuating the at least one first strut, and at least one second actuator for actuating the at least one second strut, the method comprising the steps of:
receiving a command to shift the transmission to reverse;
deactivating the at least one second actuator;
determining whether the at least one second strut retracted into the pocket plate;
activating the at least one first actuator to move the at least one first strut into its extended position when it is determined the at least one second strut remains in its extended position out past the one of the plurality of pockets;
applying a first rotational torque to the notch plate in a direction allowing the notch plate to abut the at least one first strut to release the at least one second strut from abutting engagement with the notch plate resulting in the transmission entering a reverse ready state; and
applying a second rotational torque opposite the first rotational torque to rotate the notch plate out of engagement with the at least one first strut resulting in the transmission entering a reverse state.