Uphill vehicle launch in one-pedal driving mode
AssigneeFord Global Technologies, LLC
InventorsBryan Michael Bolger, Sergey Gennadievich Semenov
Life of this patent
Estimating the term…
Abstract
A vehicle includes a powertrain having an electric machine configured to power driven wheels and friction brakes. A vehicle controller is programmed to, with the vehicle being in a one-pedal driving mode and the friction brakes automatically engaged to hold the vehicle stationary, release the friction brakes absent input from a brake pedal in response to an estimated torque of the driven wheels exceeding a grade-compensation torque threshold that is based on road grade to launch the vehicle without rollback.
Claims20
A vehicle comprising:
- a powertrain including an electric machine configured to power driven wheels;
- friction brakes;
- and
- a controller programmed to, in response to the vehicle being in a one-pedal driving mode and the friction brakes automatically engaged to hold the vehicle stationary, release the friction brakes absent input from a brake pedal in response to an estimated torque of the driven wheels exceeding a grade-compensation torque threshold that is based on road grade to launch the vehicle without rollback.
A vehicle comprising:
- an accelerator pedal;
- a brake pedal;
- a powertrain including an electric machine configured to power driven wheels;
- friction brakes;
- and
- a controller programmed to, during a one-pedal driving mode:
- command the electric machine to propel and regeneratively brake the vehicle based on a position of the accelerator pedal only,
- in response to the vehicle becoming stationary, command engagement of the friction brakes and end regenerative braking, and
- in response to, the vehicle being stationary, the position of the accelerator pedal exceeding a predefined threshold position and an estimated torque of the driven wheels exceeding a grade-compensation torque threshold that is based on road grade, release the friction brakes, absent input from the brake pedal, to launch the vehicle without rollback.
A method of launching a vehicle when in a one-pedal driving mode, comprising:
- commanding an electric powertrain to propel and regeneratively brake the vehicle based on a position of an accelerator pedal only;
- in response to the vehicle becoming stationary, commanding engagement of friction brakes;
- and
- releasing the friction brakes in response to an estimated wheel torque exceeding a grade-compensation torque threshold that is based on road grade to launch the vehicle without rollback.
Dependencies are inferred from the claim text.