Patent ID: 8229633
Filing Date: 2012-07-24
Classification: B60K,B60L,B60W,F16H,Y02T

Abstract:
1. Method for controlling an engine selectively operative in one of a plurality of engine states to transfer torque to an input member of a hybrid transmission, the hybrid transmission operative to transfer torque between the input member and a torque machine and an output member to generate an output torque in response to an operator torque request, the method comprising: monitoring the operator torque request; determining operating power costs associated with a plurality of candidate engine states in response to the operator torque request; determining transition costs for transitioning the engine from a present engine state to each of the candidate engine states; determining stabilization costs for operating the engine in the present engine state and subsequently operating the engine in each of the candidate engine states; and selecting a preferred engine state based upon the operating power costs, the transition costs, and the stabilization costs for the plurality of engine states.