Patent ID: 7988594
Filing Date: 2011-08-02
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. Method for controlling a powertrain system including an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states, comprising: determining a current transmission operating range state and engine state; determining at least one potential transmission operating range state and engine state; determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, wherein said preferability factors associated with potential transmission operating range states include load-stabilizing preferability factors; preferentially weighting the preferability factors for the current transmission operating range state and engine state; and selectively commanding changing the current transmission operating range state and engine state based upon said preferability factors.