Battery state of charge engine shut-off threshold based on predicted operation
AssigneeFord Global Technologies, LLC
InventorsKenneth James Miller, Douglas Raymond Martin, William Paul Perkins
Life of this patent
Estimating the term…
Abstract
A vehicle includes an engine; a fraction battery; and a controller or a battery control system having a controller. The controller is programed to respond to a predicted duration of charge sustaining operation for a drive cycle and a speed of the vehicle. When the predicted duration is greater than a predetermined duration and the speed is less than a speed threshold, the controller increases a state of charge threshold of the traction battery associated with triggering shut offs of the engine to reduce cycling of the engine during the drive cycle.
Claims16
A vehicle comprising:
- an engine;
- a fraction battery;
- and
- a controller programed to, in response to a predicted duration of charge sustaining operation for a drive cycle being greater than a predetermined duration and a speed of the vehicle being less than a speed threshold, increase a state of charge threshold of the traction battery associated with triggering shut offs of the engine to reduce cycling of the engine during the drive cycle.
A method of operating a hybrid electric vehicle comprising:
- in response to a predicted duration of charge sustaining operation for a drive cycle being greater than a predetermined duration and a speed of the vehicle being less than a speed threshold, increasing by a controller a state of charge threshold of a traction battery associated with triggering shut offs of an engine to reduce cycling of the engine during the drive cycle.
A vehicle traction battery control system comprising:
- a controller programed to, in response to a vehicle speed being less than a threshold speed and an expected duration of charge sustaining operation being greater than a predetermined duration, increase a traction battery state of charge threshold that, when exceeded while an engine is on, triggers a command to shut down the engine to reduce cycling of the engine.
Dependencies are inferred from the claim text.