Patent ID: 8099203
Filing Date: 2012-01-17
Classification: B60K,B60L,B60W,F02N,Y02T

Abstract:
1. A method for controlling a powertrain including an internal combustion engine mechanically connected to a transmission to transmit tractive power to a driveline, the method comprising: commanding an engine autostart event from an engine off state during ongoing operation of the powertrain; determining a desired input torque from the engine to the transmission; selecting an engine autostart process based upon the desired input torque, the selected engine autostart process including a respective crank fuel mass profile predetermined for the selected engine autostart process and a predetermined number of cylinder events to conduct during the selected engine autostart process; determining an injected crank fuel mass for each of the predetermined number of cylinder events, the injected crank fuel mass adaptive for successive cylinder events and defined by the respective crank fuel mass profile predetermined for the selected engine autostart process; cranking the engine; and fueling the engine during the engine cranking according to the injected crank fuel mass for each of the predetermined number of cylinder events and defined by the respective crank fuel mass profile predetermined for the selected engine autostart process.