A method of disconnecting a generator from a source of mechanical rotation includes receiving a generator disconnect command and receiving a rotational position of a generator input member. The input member rotational angle is compared to the target disconnect angle range, and a determination made whether to disconnect the input member from a generator drive member based on the comparison.

Methods and systems are provided for a dog clutch engagement system of a transmission, the dog clutch engagement system including a dog clutch comprising an axially movable sleeve, a first output disk, a second output disk, and a radially translatable key. In one example, a method for operating the dog clutch comprises receiving output from sensors that indicate a rotational speed difference between a sleeve and a first output disk is within a rotational speed difference threshold, the rotational speed of the first output disk and the sleeve being nearly the same, axially sliding a sleeve of the clutch from a neutral position to a first position via an actuator, and rotating the sleeve at the first position to enable a key to encounter an internal cavity and extend into the internal cavity of the first output disk.

Methods and systems are provided for a dog clutch engagement system of a transmission, the dog clutch engagement system including a dog clutch comprising an axially movable sleeve, a first output disk, a second output disk, and a radially translatable key. In one example, a method for operating the dog clutch comprises receiving output from sensors that indicate a rotational speed difference between a sleeve and a first output disk is within a rotational speed difference threshold, the rotational speed of the first output disk and the sleeve being nearly the same, axially sliding a sleeve of the clutch from a neutral position to a first position via an actuator, and rotating the sleeve at the first position to enable a key to encounter an internal cavity and extend into the internal cavity of the first output disk.

A method of controlling an actuator for a drivetrain disconnect assembly includes actuating a solenoid to achieve multiple phases of movement, where the movement may be controlled differently in the different phases. The method includes actuating a solenoid of an actuator to drive a first clutch member along an axis and relative to a second clutch member between a first position, a second position, a third position and a fourth position. Movement of the first clutch member between the second position and the third position is at a faster rate than is the movement of the first clutch member: a) between the first position and the second position; and b) between the third position and the fourth position.

A clutch actuator relatively moves a first clutch member and a second clutch member relative to each other in an axial direction. A phase difference sensor detects a phase difference between the first and second clutch members. A controller executes a synchronization operation that gradually decreases an input-output rotational speed difference until it reaches a target rotational speed difference and detects a current latest engagement timing based on an output of the phase difference sensor. After an adjustment reference time point, at which the input-output rotational speed difference reaches a phase-difference-detectable rotational speed difference that allows the phase difference sensor to detect the phase difference, the controller adjusts the phase difference by changing a change characteristic of the input-output rotational speed difference such that one of future engagement timings coincides with a target completion time point, based on information obtained at an arbitrary phase difference detection time point.