Multi-mode integrated starter-generator device with solenoid cam actuation apparatus

A drivetrain assembly for a work vehicle, comprising:

• an engine;
• an electric machine;
• a gear set configured to receive rotational input from the electric machine and from the engine and to couple the electric machine and the engine in a first power flow direction and a second power flow direction, the gear set configured to operate in one of at least a first gear ratio, a second gear ratio, or a third gear ratio in the first power flow direction and at least a fourth gear ratio in the second power flow direction;
• at least one clutch selectively coupled to the gear set to effect one of the first, second, or third gear ratios in the first power flow direction and the fourth gear ratio in the second power flow direction;
• an actuation assembly including at least one electromechanical solenoid device mounted to a reaction member and configured to selectively shift the at least one clutch from a disengaged position in which the at least one clutch is decoupled from the gear set into an engaged position in which the at least one clutch is coupled to the gear set;
• and
• a controller coupled to the at least one electromechanical solenoid device to selectively energize and shift the electromechanical solenoid device.