One-pedal drive system for a vehicle

A vehicle comprising:

• an accelerator pedal configured to generate commands to increase vehicle speed;
• a brake pedal configured to generate commands to decrease vehicle speed;
• an electric machine configured to propel the vehicle and to brake the vehicle during regenerative braking;
• friction brakes configured to brake the vehicle;
• and
• a controller programmed to,
• responsive to an operator selection of a one-pedal drive mode,
• decrease vehicle speed via regenerative braking in response to releasing the accelerator pedal in the absence of depressing the brake pedal,
• transition the vehicle to an inhibit state in which the friction brakes are applied to prevent vehicle creep in response to receiving an automated signal to disable the one-pedal drive mode and vehicle speed becoming zero while the one-pedal drive mode is selected, and
• exit the inhibit state, release the friction brakes, and increase vehicle speed in response to depressing the accelerator pedal to a position that is greater than a threshold.

A vehicle comprising:

• an accelerator pedal;
• a brake pedal;
• an electric machine configured to propel the vehicle and to brake the vehicle during regenerative braking;
• friction brakes configured to brake the vehicle;
• and
• a controller programmed to,
• responsive to an operator selection of a one-pedal drive mode,
• increase vehicle speed in response to depressing the accelerator pedal, and
• decrease vehicle speed via regenerative braking in response to releasing the accelerator pedal in the absence of depressing the brake pedal,
• responsive to a vehicle speed becoming zero while the one-pedal drive mode is selected and to receiving an automated signal to disable the one-pedal drive mode,
• transition the vehicle to an inhibit state in which the friction brakes are applied to prevent vehicle creep, and
• responsive to presence of the inhibit state,
• maintain application of the friction brakes to maintain vehicle speed at zero in response to depressing the accelerator pedal to a first position that is less than a threshold,
• release the friction brakes, increase vehicle speed, exit the inhibit state, and return to the one-pedal drive mode in response to depressing the accelerator pedal to a second position that is greater than the threshold,
• maintain application of the friction brakes to maintain vehicle speed at zero in response to releasing the brake pedal while an accelerator pedal position is less than the threshold,
• maintain application of the friction brakes to maintain vehicle speed at zero in response to an operator deselection of the one-pedal drive mode and depressing the accelerator pedal to a third position that is less than a second threshold, and
• release the friction brakes, increase vehicle speed, exit the inhibit state, and operate the vehicle in a nominal two-pedal drive mode in response to the operator deselection of the one-pedal drive mode and depressing the accelerator pedal to a fourth position that is greater than the second threshold.