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US 11,605,845 B2Granted
Strategies for warming stationary vehicle traction battery
AssigneeFord Global Technologies, LLC
InventorsRian Edman, Kelly Johnson
Life of this patent
Estimating the term…
Abstract
A vehicle includes an engine, an electric machine, a traction battery, and a controller. The controller, responsive to the vehicle not moving, a temperature of the traction battery being less than a temperature threshold, and a state-of-charge of the traction battery being greater than a state-of-charge threshold, rotates the engine via the electric machine powered by the traction battery while no fuel is supplied to the engine.
Claims12
A vehicle comprising:
- an engine;
- an electric machine coupled to the engine;
- a traction battery configured to supply power to the electric machine;
- and
- a controller programmed to,
- responsive to the vehicle not moving, a temperature of the traction battery being less than a first temperature threshold, and a state-of-charge (SOC) of the traction battery being greater than a first SOC threshold, rotate the engine via the electric machine powered by the traction battery while no fuel is supplied to the engine,
- calculate an available torque from the electric machine using the temperature of the traction battery and a total toque demand including an engine torque demand without fuel and an accessory torque demand, and responsive to the available torque being insufficient to satisfy the total torque demand, to supply fuel to the engine.
4 more elements
A method comprising:
- while a temperature of a traction battery is less than a first temperature threshold, rotating an engine with an electric machine coupled thereto when no fuel is supplied to the engine;
- and
- calculating an available torque from the electric machine using the temperature of the traction battery and a total toque demand including an engine torque demand without fuel and an accessory torque demand, and while the available torque is insufficient to satisfy the total torque demand, supplying fuel to the engine.
A powertrain system comprising:
- a traction battery;
- and
- a controller programmed to,
- while a temperature of the traction battery is less than a first temperature threshold and a state-of-charge (SOC) of the traction battery is greater than a first SOC threshold, command the traction battery to provide power to an electric machine to rotate an engine mechanically coupled therewith while no fuel is supplied to the engine,
- calculate an available torque from the electric machine using the temperature of the traction battery and a total toque demand including an engine torque demand without fuel and an accessory torque demand, and while the available torque is insufficient to satisfy the total torque demand, command fuel to be supplied to the engine.
2 more elements
Dependencies are inferred from the claim text.