# US 11,214,278 B2 · One-pedal drive system for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,214,278 B2 - Document ID: US11214278B2 - Status: Granted - Kind: B2 - Application number: 16/665,748 - Filed: 2019-10-28 - Published: 2021-04-29 - Granted: 2022-01-04 - Earliest claimed: 2019-10-28 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Joshua Hoop; Susan Rebecca Cikanek; Bader M Badreddine - Web page: https://patentgrep.com/patent/US11214278B2 ## CPC - B60L 7/22: Dynamic electric resistor braking, combined with dynamic electric regenerative braking - B60W 50/10: Interpretation of driver requests or demands - B60K 6/26: characterised by the motors or the generators - B60K 26/02: of initiating means or elements - B60L 7/10: Dynamic electric regenerative braking (B60L7/22 takes precedence) - B60W 10/04: including control of propulsion units - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/184: with wheel brakes - B60W 10/196: acting within the driveline, e.g. retarders - B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} - B60W 30/18054: {at stand still, e.g. engine in idling state (hill holding B60W30/18118)} - B60W 30/18063: {Creeping} - B60W 30/18109: {Braking} - B60W 30/18181: {Propulsion control with common controlling member for different functions} - B60W 50/082: {Selecting or switching between different modes of propelling} - B60L 2240/12: Speed - B60L 2240/16: longitudinal - B60L 2240/463: Torque - B60L 2250/26: by pedal actuation - B60W 2540/10: Accelerator pedal position - B60W 2540/103: Accelerator thresholds, e.g. kickdown - B60W 2540/12: Brake pedal position - B60W 2540/215: Selection or confirmation of options - B60W 2710/18: Braking system - B60Y 2200/91: Electric vehicles - B60Y 2200/92: Hybrid vehicles - B60Y 2300/18058: Creeping - B60Y 2300/18125: Regenerative braking - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A vehicle includes an accelerator pedal, a brake pedal, an electric machine, friction brakes, and a controller. The electric machine is configured to propel the vehicle and to brake the vehicle during regenerative braking. The friction brakes are configured to brake the vehicle. The controller is 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. The controller is further programmed to 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. ## Claims ### Claim 1 A vehicle comprising: an accelerator 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, and 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 in response to vehicle speed becoming zero, 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, and release the friction brakes, increase vehicle speed, 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. ### Claim 2 (depends on 1) The vehicle of claim 1 further comprising a brake pedal and wherein the controller is further programmed to, in response to releasing the brake pedal while an accelerator pedal position is less than the threshold in the inhibit state, maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 3 (depends on 1) The vehicle of claim 1, wherein the controller is further programmed to, 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 in the inhibit state, maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 4 (depends on 3) The vehicle of claim 3, wherein the controller is further programmed to, 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 in the inhibit state, release the friction brakes, increase vehicle speed, and operate the vehicle in a nominal two-pedal drive mode. ### Claim 5 (depends on 1) The vehicle of claim 1, wherein the controller is further programmed to, in response to an observed wheel torque exceeding a torque threshold and the accelerator pedal being released in the inhibit state, transition the vehicle to a fault state and maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 6 (depends on 5) The vehicle of claim 5 further comprising a brake pedal and wherein the controller is further programmed to, in response to depressing and releasing the brake pedal while the accelerator pedal is released in the fault state, increase the wheel torque to allow vehicle creep. ### Claim 7 (depends on 5) The vehicle of claim 5, wherein the controller is further programmed to, in response to the observed wheel torque decreasing to less than the torque threshold within a predetermined period of time after the observed wheel torque exceeded the torque threshold, transition the vehicle to from the fault state to the inhibit state. ### Claim 8 (depends on 1) The vehicle of claim 1 further comprising a user interface, and wherein the controller is configured to enable and disable the one-pedal driving mode based on an operator selected input from the user interface. ### Claim 9 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. ### Claim 10 (depends on 9) The vehicle of claim 9, wherein the controller is further programmed to, in response to depressing the accelerator pedal to a second position that is less than the threshold in the inhibit state, remain in the inhibit state and maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 11 (depends on 9) The vehicle of claim 9, wherein the controller is further programmed to, in response to releasing the brake pedal while an accelerator pedal position is less than the threshold in the inhibit state, remain in the inhibit state and maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 12 (depends on 9) The vehicle of claim 9, wherein the controller is further programmed to, in response to an operator deselection of the one-pedal drive mode and depressing the accelerator pedal to a second position that is less than a second threshold in the inhibit state, remain in the inhibit state and maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 13 (depends on 12) The vehicle of claim 12, wherein the controller is further programmed to, in response to the operator deselection of the one-pedal drive mode and depressing the accelerator pedal to a third position that is greater than the second threshold in the inhibit state, exit the inhibit state, release the friction brakes, increase vehicle speed, and operate the vehicle in a nominal two-pedal drive mode. ### Claim 14 (depends on 9) The vehicle of claim 9, wherein the controller is further programmed to, in response to an observed wheel torque exceeding a torque threshold and the accelerator pedal being released in the inhibit state, transition the vehicle to a fault state and maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 15 (depends on 14) The vehicle of claim 14, wherein the controller is further programmed to, in response to depressing and releasing the brake pedal while the accelerator pedal is released after transitioning to the fault state, increase the wheel torque to allow vehicle creep. ### Claim 16 (depends on 14) The vehicle of claim 14, wherein the controller is farther programmed to, in response to the observed wheel torque decreasing to less than the torque threshold within a predetermined period of time after the observed wheel torque exceeded the torque threshold, transition the vehicle to from the fault state to the inhibit state. ### Claim 17 (depends on 9) The vehicle of claim 9 further comprising a user interface, and wherein the controller is configured to enable and disable the one-pedal driving mode based on an operator selected input from the user interface. ### Claim 18 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. ### Claim 19 (depends on 18) The vehicle of claim 18, wherein the controller is further programmed to, in response to an observed wheel torque exceeding a torque threshold and the accelerator pedal being released in the inhibit state, transition the vehicle to a fault state and maintain application of the friction brakes to maintain vehicle speed at zero. ### Claim 20 (depends on 19) The vehicle of claim 19, wherein the controller is further programmed to, in response to depressing and releasing the brake pedal while the accelerator pedal is released after transitioning to the fault state, increase the wheel torque to allow vehicle creep.