Patent ID: 8880256

Claim:
A method for stabilizing selection between a plurality of operating range states of an electro-mechanical multi-mode transmission configured to transfer torque among an engine, at least one electric machine, and a driveline, the method comprising: a control module configured to execute the following steps, comprising: requesting operation of the electro-mechanical multi-mode transmission in a preferred operating range state while a shift from a first operating range state to a second operating range state is in progress prior to achieving the second operating range state; monitoring powertrain information; comparing the powertrain information to a driver perception threshold only if a change of mind condition is detected; and avoiding the shift to the second operating range state and commanding a shift to the preferred operating range state if the powertrain information does not violate the driver perception threshold; wherein the driver perception threshold comprises at least an acceptable engine speed allowing a transmission shift to the preferred operating range state that would not be perceivable to the driver; wherein the change of mind condition includes a condition when the requested preferred operating range state is adjacent to the monitored powertrain information along a defined priority shift path from the first operating range state to the second operating range state.