Patent ID: 8433486
Filing Date: 2013-04-30
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A method to determine a preferred operating point for an internal combustion engine mechanically coupled to an electro-mechanical transmission to transmit power to a driveline in response to an operator torque request, wherein a controller executes the following: determining a current set of candidate operating points for a current search iteration; iteratively wherein the current set of candidate operating points for the current search iteration and the subsequent set of candidate operating points for the subsequent search iteration have a common operating point; selecting the subsequent set of candidate operating points for the subsequent search iteration that define a rectangle having a common side with a rectangle defined by the current set of candidate operating points for the current search iteration when the same candidate operating point is identified as a base point for three consecutive iterations; determining the preferred operating point for operating the internal combustion engine comprising the candidate operating point with the lowest operating cost determined after a predetermined number of iterations; and controlling the powertrain based on the preferred operating point for the internal combustion engine.