# US 12,005,901 B2 · Vehicle including electric motor and method of controlling brake lamp for the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,901 B2 - Document ID: US12005901B2 - Status: Granted - Kind: B2 - Application number: 16/953,582 - Filed: 2020-11-20 - Published: 2021-06-10 - Granted: 2024-06-11 - Earliest claimed: 2019-12-10 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Hui Un Son; Seong Wook Moon; Song Il Park; Sung Bae Jeon; Sung Hoon Yu; Joon Young Park; Chan Ho Lee - Web page: https://patentgrep.com/patent/US12005901B2 ## CPC - B60L 15/2009: {for braking} - B60W 30/18127: {Regenerative braking} - B60L 7/26: Controlling the braking effect - B60L 15/2018: {for braking on a slope} - B60L 15/2054: {by controlling transmissions or clutches} - B60Q 1/44: for indicating braking action {or preparation for braking, e.g. by detection of the foot approaching the brake pedal} - B60T 1/10: by utilising wheel movement for accumulating energy, e.g. driving air compressors - B60T 17/22: Devices for monitoring or checking brake systems; Signal devices - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/30: including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps - F16D 61/00: Brakes with means for making the energy absorbed available for use (F16D57/00 takes precedence) - B60L 2240/12: Speed - B60L 2240/423: Torque - B60T 2270/60: Regenerative braking - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/72: Electric energy management in electromobility - 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 - B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method of controlling a brake lamp of a vehicle including an electric motor as a power source includes determining whether gear shifting is required and whether there is a forward section with a suddenly changing slope when regenerative braking is performed through the electric motor without manipulation of an accelerator pedal or a brake pedal, delaying the gear shifting until the gear shifting exceeds a gear-shifting limit when the gear shifting is required and when there is the forward section with the suddenly changing slope, calculating acceleration based on regenerative braking torque while the gear shifting is delayed, and controlling the brake lamp based on the calculated acceleration. ## Claims ### Claim 1 A method of controlling a brake lamp of a vehicle having an electric motor as a power source, the method comprising: determining whether gear shifting is required and whether there is a forward section with a slope that is greater than a preset threshold value when regenerative braking is performed through the electric motor without manipulation of an accelerator pedal or a brake pedal; delaying the gear shifting until a gear-shifting limit is exceeded when the gear shifting is required, and when there is the forward section with the slope; calculating acceleration based on regenerative braking torque while the gear shifting is delayed; and controlling the brake lamp based on the calculated acceleration; wherein whether the gear shifting limit is exceeded is determined based on a vehicle speed, a gear ratio of a current gear stage, and a maximum number of revolutions per minute of a motor. ### Claim 2 (depends on 1) The method of claim 1, further comprising: performing the gear shifting when the gear-shifting limit is exceeded; correcting an acceleration value of an acceleration sensor using acceleration calculated based on the regenerative braking torque when the gear shifting begins; and controlling the brake lamp based on the corrected acceleration. ### Claim 3 (depends on 2) The method of claim 2, wherein the correcting comprises: calculating an initial slope using the acceleration calculated based on the regenerative braking torque; and correcting the acceleration value of the acceleration sensor using the initial slope. ### Claim 4 (depends on 1) The method of claim 1, wherein the delaying comprises: determining whether gear shifting is completed up to the forward section with the slope based on a remaining distance and a vehicle speed up to the forward section with the slope, and a time taken to shift gears; and when gear shifting is not capable of being completed, delaying the gear shifting. ### Claim 5 (depends on 1) A non-transitory computer-readable recording medium having recorded thereon a program for executing the method of claim 1. ### Claim 6 A vehicle comprising: an electric motor configured to provide regenerative braking force; and a controller; wherein the controller is configured to: determine whether gear shifting is required and whether there is a forward section with a slope that is greater than a preset threshold value when regenerative braking is performed through the electric motor without manipulation of an accelerator pedal or a brake pedal; delay the gear shifting until the gear shifting exceeds a gear-shifting limit when the gear shifting is required and when there is the forward section with the slope; calculate acceleration based on regenerative braking torque while the gear shifting is delayed; and control the brake lamp based on the calculated acceleration; wherein the controller is further configured to determine whether the gear-shifting limit is exceeded based on a vehicle speed, a gear ratio of a current gear stage, and a maximum number of revolutions per minute of a motor. ### Claim 7 (depends on 6) The vehicle of claim 6, wherein the controller is further configured to: allow the gear shifting when the gear-shifting limit is exceeded; correct an acceleration value of an acceleration sensor using acceleration calculated based on the regenerative braking torque when the gear shifting begins; and control the brake lamp based on the corrected acceleration. ### Claim 8 (depends on 7) The vehicle of claim 7, wherein the controller is further configured to calculate an initial slope using the acceleration calculated based on the regenerative braking torque, and correct the acceleration value of the acceleration sensor using the initial slope. ### Claim 9 (depends on 6) The vehicle of claim 6, wherein the controller is further configured to determine whether gear shifting is completed up to the forward section with the slope based on a remaining distance and a vehicle speed up to the forward section with the slope, and a time taken to shift gears, and when the gear shifting is not capable of being completed, the controller is configured to delay the gear shifting.