Method for operating an internal combustion engine to transmit power to a driveline

摘要

A method for operating an engine (14) includes defining a two-dimensional search region based upon an input power transmittable between the internal combustion engine (14) and an electro-mechanical transmission (10). The method further includes iteratively dividing the two-dimensional search region into a plurality of subregions based upon one of the input power and the input speed, iteratively determining an engine operating point within each of the subregions, iteratively calculating an operating cost to operate the internal combustion engine (14) and the electro-mechanical transmission (10) to meet the operator torque request for each engine operating point within each of the subregions, and iteratively identifying the subregion having a minimum operating cost to meet the operator torque request. A preferred engine operating point is determined based upon the engine operating point within the identified subregion having the minimum operating cost to meet the operator torque request.