Patent ID: 8359829

Claim:
A powertrain comprising: an engine; a motor; an axle configured to be coupled to a load; the engine, motor, and axle coupled such that a combination of engine output and motor output may be delivered to the load; a power source coupled to the motor; and a powertrain control unit coupled to the engine, motor, and power source, the powertrain control unit configured to receive a demand for output to be provided to the load and determine an operating condition comprising a combination of engine output and motor output that fulfills the demand, the powertrain control unit including a processor and coupled to a computer readable storage medium having embodied thereon a program executable by the processor to perform a method comprising: receiving a demand for output to be provided to the load; predicting a first emissions profile that would result from fulfilling the demand under a first operating condition, the first emissions profile characterizing one or more criteria pollutants in an exhaust stream from the engine during operation according to the first operating condition; predicting a second emissions profile that would result from fulfilling the demand under a second operating condition, the second emissions profile having a reduced amount of at least one criteria pollutant as compared to the first emissions profile; and controlling the motor and engine to fulfill the demand according to the second operating condition.