Patent ID: 8112206
Filing Date: 2012-02-07
Classification: B60K,B60L,B60W,F16H,Y02T,Y10T

Abstract:
1. Method for controlling a powertrain system comprising an engine coupled to an input member of a transmission device operative to transmit torque between the input member and a torque machine and an output member, the torque machine connected to an energy storage device, the method comprising: monitoring a temperature of the energy storage device; evaluating each of a plurality of candidate transmission operating range states including evaluating candidate engine states and candidate engine operating points to determine operating costs for operating the powertrain system in each of the candidate transmission operating range states in response to an operator torque request, including determining operating costs for operating the powertrain system at the candidate engine states and candidate engine operating points at each of the candidate transmission operating range states based upon the temperature of the energy storage device; selecting a preferred engine state and a preferred engine operating point for each of the candidate transmission operating range states, wherein the preferred engine state and the preferred engine operating point achieve a minimum operating cost for operating the powertrain system at the candidate transmission operating range state in response to the operator torque request, selecting a preferred transmission operating range state comprising the one of the candidate transmission operating range states associated with a minimum of the minimum operating costs for operating the powertrain system; and controlling operation of the powertrain system in the preferred transmission operating range state at the associated preferred engine state and preferred engine operating point.