Abstract: A method of protecting a multi-function drive axle system from damage, comprising the steps of: determining the axle torque and speed from sensors positioned on the multi-function drive axle system; using the axle torque and speed to approximate damage values for the driveline of the multi-function drive axle system; comparing the approximated values of driveline damage with driveline damage durability targets; identifying if the approximated values of driveline damage exceed the driveline damage durability targets; and limiting the engine torque and/or speed to produce an axle torque and speed corresponding to driveline damage values that do not exceed the driveline damage durability targets.

Abstract: A method of protecting a multi-function drive axle system from damage, comprising the steps of: determining the axle torque and speed from sensors positioned on the multi-function drive axle system; using the axle torque and speed to approximate damage values for the driveline of the multi-function drive axle system; comparing the approximated values of driveline damage with driveline damage durability targets; identifying if the approximated values of driveline damage exceed the driveline damage durability targets; and limiting the engine torque and/or speed to produce an axle torque and speed corresponding to driveline damage values that do not exceed the driveline damage durability targets.

Abstract: A method and system of operating a vehicular hybrid powertrain having a first prime mover, a second prime mover, a planetary gear set configured to sum outputs from the first prime mover and the second prime mover, and a transmission coupled to an output of the planetary gear set includes initially driving the transmission with the second prime mover, cranking the first prime mover with the second prime mover, accelerating the first prime mover to a reference speed, and maintaining the first prime mover at approximately the reference speed while varying a speed of the second prime mover to vary an output velocity of the planetary gear set

Abstract: A hybrid powertrain system includes a first prime mover having an output, a second prime mover having an output, a synchronizing clutch selectively coupling the first prime mover output and the second prime mover output, a multi-ratio transmission having an input, and a planetary gear set selectively coupling the second prime mover output to the first prime mover output or the multi-ratio transmission input based on a coupling state of the synchronizing clutch.

Abstract: A powertrain system is provided that includes a prime mover and a change-gear transmission having an input, at least two gear ratios, and an output. The powertrain system also includes a power shunt configured to route power applied to the transmission by one of the input and the output to the other one of the input and the output. A transmission system and a method for facilitating shifting of a transmission system are also provided.