# US 12,759,409 B2 · Electrified vehicle and regenerative braking control method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,409 B2 - Document ID: US12759409B2 - Status: Granted - Kind: B2 - Application number: 18/944,787 - Filed: 2024-11-12 - Published: 2025-10-30 - Granted: 2026-10-13 - Earliest claimed: 2024-04-29 - Assignees: Hyundai Motor Company; Kia Corporation - Applicants: Hyundai Motor Company; Kia Corporation - Inventors: Sun Young Park; Jun Hyeong Jo; Sung Deok Kim; Sang Hyeok Mo - Web page: https://patentgrep.com/patent/US12759409B2 ## CPC - B60L 7/18: Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence) - B60K 35/22: Display screens - B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) - B60K 35/26: using acoustic output - B60K 2360/139: Clusters of instrument input devices - B60K 2360/167: Vehicle dynamics information - B60L 2240/12: Speed - B60L 2240/26: Vehicle weight - B60L 2240/46: related to wheels - B60L 2240/62: Vehicle position - B60L 2240/642: Slope of road - B60L 2240/68: Traffic data - B60L 2250/26: by pedal actuation - 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 - 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 ## Abstract A vehicle and a control method thereof are capable of determining the presence of a downhill road and a deceleration zone ahead, determining the final regenerative braking torque based on the torque required for regenerative braking on the downhill road and deceleration zone, and performing regenerative braking based on the final regenerative braking torque. ## Claims ### Claim 1 A method for controlling regenerative braking of a vehicle, the method comprising: determining, by a controller, a first regenerative braking torque based on recognition of a downhill road; determining a second regenerative braking torque based on recognition of a deceleration driving zone ahead; determining a larger of the first regenerative braking torque and the second regenerative braking torque as a final regenerative braking torque; and performing regenerative braking based on the final regenerative braking torque; wherein determining the first regenerative braking torque comprises: determining first regenerative braking entry conditions; and determining the first regenerative braking torque based on the first regenerative braking entry conditions being satisfied; wherein determining the first regenerative braking entry conditions includes: determining whether the first regenerative braking entry conditions are satisfied based on at least one of whether a smart regenerative brake function is activated, whether the vehicle is coasting on a downhill road, whether a stop or acceleration signal is received, and whether the vehicle speed exceeds a predetermined target speed; and wherein the target speed is determined based on the vehicle speed at a time when brake pedal operation ceases. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the first regenerative braking torque includes: determining the first regenerative braking torque based on at least one of vehicle speed, vehicle wheel radius, vehicle weight, and slope of the downhill road. ### Claim 3 (depends on 1) The method of claim 1, wherein determining the second regenerative braking torque includes: determining second regenerative braking entry conditions are satisfied; and determining the second regenerative braking torque based on the second regenerative braking entry conditions being satisfied. ### Claim 4 (depends on 3) The method of claim 3, wherein determining whether the second regenerative braking entry conditions are satisfied includes: determining whether the second regenerative braking entry conditions are satisfied based on whether a sign is recognized. ### Claim 5 (depends on 1) The method of claim 1, wherein determining the second regenerative braking torque includes: determining, based on a sign indicative of the deceleration driving zone ahead being recognized, the second regenerative braking torque until the vehicle reaches a location corresponding to the sign. ### Claim 6 (depends on 5) The method of claim 5, wherein determining the second regenerative braking torque until the vehicle reaches the location corresponding to the sign includes: determining the second regenerative braking torque until the vehicle reaches the corresponding location, even after the sign is no longer recognized after being initially detected. ### Claim 7 (depends on 1) The method of claim 1, further comprising outputting information on the final regenerative braking torque through an output unit. ### Claim 8 A vehicle comprising: a drive motor connected to driving wheels; and a controller configured to determine whether a downhill road and a deceleration zone exists ahead, determine a first regenerative braking torque based on recognition of the downhill road and a second regenerative braking torque based on recognition of the deceleration zone ahead, determine a larger of the first regenerative braking torque and the second regenerative braking torque as a final regenerative braking torque, and control the drive motor based on the final regenerative braking torque; wherein the controller is configured to determine first regenerative braking entry conditions, and based on the first regenerative braking entry conditions being satisfied, is configured to determine the first regenerative braking torque; and wherein the controller is further configured to determine whether the first regenerative braking conditions are satisfied based on whether the first regenerative braking entry conditions are satisfied based on at least one of whether a smart regenerative brake function is activated, whether the vehicle is coasting on a downhill road, whether a stop or acceleration signal is received, and whether the vehicle speed exceeds a predetermined target speed, the predetermined target speed being determined based on the vehicle speed at a time when brake pedal operation ceases. ### Claim 9 (depends on 8) The vehicle of claim 8, wherein the controller is configured to determine the first regenerative braking torque based on at least one of vehicle speed, vehicle wheel radius, vehicle weight, and slope of the downhill road. ### Claim 10 (depends on 8) The vehicle of claim 8, wherein the controller is configured to determine whether second regenerative braking entry conditions are satisfied, and based on the second regenerative braking entry conditions being satisfied, to determine the second regenerative braking torque. ### Claim 11 (depends on 10) The vehicle of claim 10, wherein the controller is configured to determine whether the second regenerative braking entry conditions are satisfied based on whether a sign is recognized. ### Claim 12 (depends on 8) The vehicle of claim 8, wherein the controller is configured to determine, based on a sign indicative of the deceleration zone ahead being recognized, the second regenerative braking torque until the vehicle reaches a location corresponding to the sign. ### Claim 13 (depends on 12) The vehicle of claim 12, wherein the controller is configured to determine the second regenerative braking torque until the vehicle reaches the corresponding location, even after the sign is no longer recognized after being initially detected. ### Claim 14 (depends on 8) The vehicle of claim 8, further comprising: an information collection device configured to collect information necessary for determining the first regenerative braking torque and the second regenerative braking torque; wherein the information collection device comprises at least one of a camera, an incline sensor, a brake pedal, a vehicle speed sensor, and a navigation system. ### Claim 15 (depends on 8) The vehicle of claim 8, further comprising an output device configured to output information on the final regenerative braking torque, wherein the output device comprises at least one of a cluster, head-up display (HUD), a display device, and a speaker.