Patent ID: 7647154
Filing Date: 2010-01-12
Classification: B60K,B60L,B60W,Y02T,Y10T

Abstract:
1. Method for operating an internal combustion engine adapted to transmit torque to a hybrid transmission, comprising: determining engine input torque transmittable to the hybrid transmission for a plurality of engine states the engine states comprising an all-cylinder state and a cylinder-deactivation state wherein fewer than all cylinders remain active; executing a one-dimensional search engine over a range of engine input torques for each of the all-cylinder engine state and the cylinder-deactivation state to determine a minimum powertrain system operating cost and an associated engine input torque to meet an operator torque request for each of the all-cylinder engine state and the cylinder-deactivation state; and controlling the engine state to one of the all-cylinder state and the cylinder-deactivation state based upon the minimum powertrain system operating costs; wherein executing the one-dimensional search engine comprises iteratively selecting parametric values for the engine input torque over the range of engine input torques, and, executing a system equation to determine associated motor torques for operating the hybrid transmission to meet the operator torque request and executing a cost function for each of the iteratively selected parametric values for engine input torque and the associated motor torques to determine a powertrain system operating cost.