# US 11,027,613 B2 · Regenerative braking control system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,613 B2 - Document ID: US11027613B2 - Status: Granted - Kind: B2 - Application number: 14/171,413 - Filed: 2014-02-03 - Published: 2015-08-06 - Granted: 2021-06-08 - Earliest claimed: 2014-02-03 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Jinkoo Lee; Dale Scott Crombez; Daniel A. Gabor; Kerem Bayar - Web page: https://patentgrep.com/patent/US11027613B2 ## CPC - B60L 3/102: {of individual wheels} - B60L 3/108: {whilst braking, i.e. ABS} - B60L 7/10: Dynamic electric regenerative braking (B60L7/22 takes precedence) - B60L 7/12: for vehicles propelled by DC motors - B60L 7/18: Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence) - B60L 15/2009: {for braking} - B60L 50/52: characterised by DC-motors - B60L 2240/12: Speed - B60L 2240/423: Torque - B60L 2240/465: Slip - B60L 2250/26: by pedal actuation - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A regenerative braking control system includes at least one sensor adapted to sense a front tire impact event and transmit a sensor signal responsive to the front tire impact event during vehicle braking and a regenerative powertrain interfacing with the at least one sensor and adapted to reduce regenerative braking torque responsive to receiving the sensor signal from the at least one sensor. A regenerative braking control method is also disclosed. ## Claims ### Claim 1 A regenerative braking control system for an electric vehicle, comprising: at least one sensor configured to sense in response to a front tire impact event at least one of wheel slip and vehicle motion and transmit a sensor signal responsive to the front tire impact event during vehicle braking where regenerative braking torque is applied at a first level at rear wheels of the vehicle; and a regenerative powertrain interfacing with the at least one sensor, the regenerative powertrain configured to reduce regenerative braking torque from the first level to a current level at the rear wheels of the vehicle by a determined magnitude of reduction responsive to receiving the sensor signal from the at least one sensor at front wheels of the vehicle, the magnitude of the reduction of the regenerative braking torque at the rear wheels is determined based on and correspondingly proportional to a magnitude of the at least one of sensed wheel slip at the front wheels and vehicle motion, the regenerative powertrain configured to reduce the regenerative braking torque responsive to a determination that the front tire impact event is occurring during vehicle braking, the determination of whether the front tire impact event is occurring and corresponding reduction of regenerative braking torque repeating continuously if it is determined that vehicle braking is currently being applied and the front tire impact event is occurring. ### Claim 2 (depends on 1) The system of claim 1 wherein the vehicle comprises a hybrid electric vehicle. ### Claim 3 (depends on 1) The system of claim 1 wherein the vehicle comprises a plug-in hybrid electric vehicle. ### Claim 4 (depends on 1) The system of claim 1 further comprising an electrical storage facility interfacing with and configured to store electrical power from the regenerative powertrain. ### Claim 5 (depends on 1) The system of claim 1 wherein the regenerative powertrain is configured to apply regenerative braking torque to at least one of a front axle and a rear axle of the vehicle. ### Claim 6 (depends on 5) The system of claim 5 wherein the regenerative powertrain is configured to reduce regenerative braking torque at the rear axle of the vehicle responsive to receiving the sensor signal from the at least one sensor. ### Claim 7 (depends on 1) The system of claim 1 wherein the regenerative powertrain is configured to apply regenerative braking torque to a selected one of the front wheels and the rear wheels of the vehicle. ### Claim 8 (depends on 7) The system of claim 7 wherein the regenerative powertrain is configured to reduce regenerative braking torque at the rear axle of the vehicle responsive to receiving the sensor signal from the at least one sensor. ### Claim 9 A regenerative braking control system for an electric vehicle, comprising: at least one of a wheel slip sensor and a vehicle motion sensor configured to respectively sense at least one of wheel slip and vehicle motion responsive to a front tire impact event and transmit at least one of a wheel slip sensor signal and a vehicle motion sensor signal, respectively, responsive to a front tire impact event during vehicle braking where regenerative braking torque is applied at a first level at rear wheels of the vehicle; and a regenerative powertrain interfacing with the at least one sensor, the regenerative powertrain configured to reduce regenerative braking torque from the first level to a current level at the rear wheels of the vehicle by a determined magnitude of reduction responsive to receiving the at least one of a wheel slip sensor signal and a motion sensor signal from the at least one of a wheel slip sensor at front wheels of the vehicle and a vehicle motion sensor, the magnitude of the reduction of the regenerative braking torque at the rear wheels is determined based on and correspondingly proportional to a magnitude of the sensed at least one of wheel slip at the front wheels and vehicle motion responsive to the front tire impact event, the regenerative powertrain configured to determine a magnitude of the sensed at least one of wheel slip and vehicle motion, the regenerative powertrain configured to reduce the regenerative braking torque responsive to a determination that the front tire impact event is occurring during vehicle braking, the determination of whether the front tire impact event is occurring and corresponding reduction of regenerative braking torque repeating continuously if it is determined that vehicle braking is currently being applied and the front tire impact event is occurring. ### Claim 10 (depends on 9) The system of claim 9 wherein the vehicle comprises a hybrid electric vehicle. ### Claim 11 (depends on 9) The system of claim 9 wherein the vehicle comprises a plug-in hybrid electric vehicle. ### Claim 12 (depends on 9) The system of claim 9 further comprising an electrical storage facility interfacing with and configured to store electrical power from the regenerative powertrain. ### Claim 13 (depends on 9) The system of claim 9 wherein the regenerative powertrain is configured to apply the regenerative braking torque to at least one of a front axle and a rear axle of the vehicle. ### Claim 14 (depends on 13) The system of claim 13 wherein the regenerative powertrain is configured to reduce the regenerative braking torque at the rear axle of the vehicle responsive to receiving the sensor signal from the at least one sensor. ### Claim 15 (depends on 9) The system of claim 9 wherein the regenerative powertrain is configured to apply the regenerative braking torque to a selected one of the front wheels and the rear wheels of the vehicle. ### Claim 16 (depends on 15) The system of claim 15 wherein the regenerative powertrain is configured to reduce the regenerative braking torque at the rear axle of the vehicle responsive to receiving the sensor signal from the at least one sensor. ### Claim 17 A regenerative braking control system method comprising a regenerative powertrain receiving sensor signals and in response causing steps including, reducing application of regenerative braking torque from a first level to a current level of applied regenerative braking torque at rear wheels of the vehicle by a determined magnitude of reduction when at least one of wheel slip at front wheels of the vehicle and vehicle motion of a vehicle is sensed in response to a front tire impact event, the magnitude of the reduction of the regenerative braking torque is determined based on and correspondingly proportional to a magnitude of the at least one of sensed wheel slip at the front wheels and vehicle motion in response to the front tire impact event, the regenerative powertrain configured to reduce the regenerative braking torque responsive to a determination that the front tire impact event is occurring during vehicle braking, the determination of whether the front tire impact event is occurring and corresponding reduction of regenerative braking torque repeating continuously if it is determined that vehicle braking is currently being applied and the front tire impact event is occurring. ### Claim 18 (depends on 17) The method of claim 17 wherein the wheel slip is in response to the front tire impact event. ### Claim 19 (depends on 17) The method of claim 17 wherein the vehicle motion is in response to the front tire impact event. ### Claim 20 (depends on 17) The method of claim 17 wherein reducing application of regeneration torque in response to the front tire impact event comprises reducing application of the regenerative braking torque at rear wheels of the vehicle in response to the vehicle motion.