US 9,810,190 B2
Method and apparatus for executing engine autostart in a powertrain system employing multiple torque generating devices
Meng Wang, Novi, MI (US); Anthony Christman, Madison Heights, MI (US); Poh Fong Chin, Novi, MI (US); John Janczak, Commerce Township, MI (US); Anthony H. Heap, Ann Arbor, MI (US); Kee Yong Kim, Ann Arbor, MI (US); Bryan J. Morton, Saline, MI (US); and Goro Tamai, Bloomfield Hills, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Apr. 23, 2015, as Appl. No. 14/694,529.
Prior Publication US 2016/0312754 A1, Oct. 27, 2016
Int. Cl. F02N 11/08 (2006.01); F02D 29/02 (2006.01); B60W 10/26 (2006.01); B60W 10/06 (2006.01); B60W 20/50 (2016.01); B60W 20/13 (2016.01)
CPC F02N 11/0803 (2013.01) [B60W 10/06 (2013.01); B60W 10/26 (2013.01); B60W 20/13 (2016.01); B60W 20/50 (2013.01); F02D 29/02 (2013.01); B60W 2400/00 (2013.01); B60W 2510/0657 (2013.01); B60W 2510/244 (2013.01); B60W 2710/06 (2013.01); F02D 2200/1002 (2013.01); F02D 2250/21 (2013.01); F02D 2250/26 (2013.01); Y10S 903/905 (2013.01); Y10S 903/93 (2013.01)] 18 Claims
OG exemplary drawing
1. A method for controlling a powertrain system that includes an internal combustion engine, an electric machine configured to generate propulsion torque responsive to a driver torque request and an energy storage device electrically connected to the electric machine, the method comprising:
requesting execution of an engine autostart operation;
evaluating, via a controller, whether a driveline torque sag will occur during the execution of the engine autostart operation prior to the engine autostart operation;
forgoing via the controller the execution of the engine autostart operation when the driveline torque sag will occur during execution of the engine autostart operation unless a superseding condition compels the execution of the engine autostart operation; and
executing via the controller the engine autostart operation upon occurrence of the superseding condition;
wherein the superseding condition is associated with a state of charge (SOC) of the energy storage device; and
wherein the driveline torque sag comprises a decrease in the propulsion torque without a corresponding decrease in the driver torque request.