METHOD AND APPARATUS TO STABLIZE SELECTION OF OPERATING STATES USING ENERGY BASED STABLIZATION STRATEGY FOR HYBRID POWERTRAIN SYSTEMS

摘要

A method for stabilizing selection between a plurality of operating range states of an electro-mechanical transmission configured to transfer torque among an engine, at least one electric machine, and a driveline includes requesting execution of a shift from a first operating range state to a second operating range state. Costs associated with operating the transmission in each of the plurality of operating range states including the first and second operating range states are monitored and an energy differential between the first and second operating range states is determined based on the monitored costs. The shift from the first operating range state to the second operating range state is executed only if the energy differential achieves an integration threshold.