Method for powertrain operation
AssigneeFord Global Technologies, LLC
InventorsDonatus Andreas Josephine Kees, Anthemios Philemon Petridis
Life of this patent
Estimating the term…
Abstract
A method for starting and operating an engine of a mild hybrid vehicle following start-up is disclosed for an engine having low and high voltage starting devices, and controlled by an electronic controller. The method comprises using the high voltage starting device as a motor to crank the engine whenever possible so as to partially discharge a high voltage battery. The method further comprises using the high voltage starting device as a generator after starting the engine if the exhaust gas temperature needs to be increased so as to assist with light-off of one or more exhaust gas after treatment devices.
Claims10
A method comprising:
- starting an engine of a vehicle having a starter motor and a belt integrated starter-generator (BISG) outside a torque path between the engine and wheels using only the BISG if engine temperature is greater than a predefined temperature limit;
- and
- if after the starting it is required to activate an exhaust after treatment device, using the BISG as a generator to load the engine to increase engine exhaust gas temperature.
A method comprising:
- starting an engine of a vehicle having a starter motor and a belt integrated starter-generator (BISG) outside a torque path between the engine and wheels using only the BISG to reduce a state of charge (SOC) of a battery used to power the BISG;
- and
- if after the starting it is required to activate an exhaust after treatment device and the SOC is less than a predefined level, using the BISG as a generator to load the engine to increase engine exhaust gas temperature.
Dependencies are inferred from the claim text.