Method for calculating amount of regenerative braking for environmentally-friendly vehicle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06G-007/00
B60L-007/18
B60T-008/172
B60T-008/52
출원번호
US-0549654
(2014-11-21)
등록번호
US-9365119
(2016-06-14)
우선권정보
KR-10-2014-0082018 (2014-07-01)
발명자
/ 주소
Huh, Jee Wook
Oh, Kyoung Cheol
Cho, Teh Hwan
Jo, Kyu Hwan
출원인 / 주소
Hyundai Motor Company
대리인 / 주소
Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A method for calculating an amount of regenerative braking for an environmentally-friendly vehicle includes: determining a presence of regenerative braking; determining whether charging is limited due to a high voltage component including a battery and a drive motor of the environmentally-friendly v
A method for calculating an amount of regenerative braking for an environmentally-friendly vehicle includes: determining a presence of regenerative braking; determining whether charging is limited due to a high voltage component including a battery and a drive motor of the environmentally-friendly vehicle at the time of the regenerative braking for the environmentally-friendly vehicle; calculating a base speed (base rpm) of a driving motor depending on a charging limit in the charging limit state at the time of the regenerative braking for the environmentally-friendly vehicle and dividing a steady torque area and a steady power area based on the calculated base speed; and determining whether an operating mode of the driving motor is a steady power mode, a steady torque mode, or a conversion mode depending on the divided steady torque area or steady torque area and calculating the amount of regenerative braking based on the determined result.
대표청구항▼
1. A method of controlling regenerative braking for an environmentally-friendly vehicle, comprising: determining, by a hybrid controller, a presence of regenerative braking for the environmentally-friendly vehicle;determining, by the hybrid controller, whether charging is limited due to a high volta
1. A method of controlling regenerative braking for an environmentally-friendly vehicle, comprising: determining, by a hybrid controller, a presence of regenerative braking for the environmentally-friendly vehicle;determining, by the hybrid controller, whether charging is limited due to a high voltage component including a battery and a drive motor of the environmentally-friendly vehicle at the time of the regenerative braking for the environmentally-friendly vehicle;calculating, by the hybrid controller, a base speed (base rpm) of a driving motor depending on a charging limit in a charging limit state at the time of the regenerative braking for the environmentally-friendly vehicle and dividing a steady torque area and a steady power area based on the calculated base speed;determining, by the hybrid controller, whether an operating mode of the driving motor is a steady power mode, a steady torque mode, or a conversion mode depending on the divided steady torque area or steady torque area and calculating an amount of regenerative braking based on the determined result; andcontrolling, by the hybrid controller, regenerative braking for the environmentally-friendly vehicle based on the calculated amount of regenerative braking,wherein the base speed of the driving motor is a speed when characteristics of the driving motor are changed from steady power to steady torque or steady torque to steady power. 2. The method of claim 1, wherein: the base speed is calculated by the following equation: NBase rpm=PwrMAX Mot/TqMAX Mot NBase rpm: Base speed (base rpm);PwrMAX Mot: Driving motor maximum power; andTqMAX Mot: Driving motor maximum torque. 3. The method of claim 1, wherein the charging limit includes a charging limit due to the driving motor itself and a charging limit due to the battery of the environmentally-friendly vehicle. 4. The method of claim 1, wherein the steady power mode is a case in which a speed of the driving motor is larger than a value obtained by adding a defined first delta rpm to the base speed, and the amount of regenerative braking at the steady power mode is calculated by the following equation: GRcal_SteadyPower=ωTmInωTmOutRegenSteadyPower=Tmotor×GRcalGRcal_SteadyPower (=GRcal): Calculated ratio at steady power mode;ωTmIn, ωTmOut: Transmission input rotation speed and output rotation speed;Tmotor: Driving motor torque; andRegenSteadyPower: Amount of regenerative braking at steady power mode. 5. The method of claim 1, wherein: the steady torque mode is a case in which a speed of the driving motor is smaller than a value obtained by subtracting a defined second delta rpm from the base speed, andthe amount of regenerative braking at the steady torque mode is calculated by the following equation: GRDiff=GRafter-GRbeforeα=GRDiffΔTShiftGRcal_SteadyTorque=GRbefore+∫0TShiftEndαⅆTRegenSteadyTorque=Tmotor×GRcal_SteadyTorqueGRafter, GRbefore: Gear level after shift and before shift;GRDiff: Difference in gear level;ΔTShift: Shift time;α: Gear ratio slope at steady torque mode;TShiftEnd: Shift ending time; GRcal_SteadyTorque(=ωTmInωTmOut):Gear ratio; andRegenSteadyTorque: Amount of regenerative braking at steady torque mode. 6. The method of claim 1, wherein the conversion mode is a case in which a speed of the driving motor is smaller than a value obtained by adding the first delta rpm to the base speed and larger than a value obtained by subtracting the second delta rpm from the base speed as the conversion mode, and the amount of regenerative braking at the conversion mode is calculated by the following equation: GRcal_ModeChange=GRbefore+∫0TShiftEndγdT RegenModeChange=Tmotor_virtual×GRcal_ModeChange GRcal_ModeChange: Calculated gear ratio at conversion mode;∫0TShiftEndγdT: Slope (increase in gear ratio) of γ;β: Gear ratio slope at conversion mode (mappable constant);γ: Currently used slope in α and β;Tmotor_virtual: Virtual motor torque;GRcal_ModeChange: Calculated slope at conversion mode; andRegenModeChange: Amount of regenerative braking at conversion mode. 7. A method of controlling regenerative braking for an environmentally-friendly vehicle, comprising: determining, by a hybrid controller, a presence of regenerative braking for the environmentally-friendly vehicle;calculating, by the hybrid controller, a base speed (base rpm) of a driving motor of the environmentally-friendly vehicle at the time of the regenerative braking;determining and dividing, by the hybrid controller, a steady torque area and a steady power area of the driving motor based on the calculated base speed;detecting, by the hybrid controller, a state and a change state of a power delivery system including a transmission of the environmentally-friendly vehicle at the time of the regenerative braking;determining, by the hybrid controller, an operating mode of the driving motor determining whether the driving motor is operated in the steady torque area or the steady power area based on the state and the change state of the detected power delivery system;calculating, by the hybrid controller, an amount of regenerative braking based on the steady power mode, the steady torque mode, or the conversion mode determined depending on the determination of the operating mode; andcontrolling, by the hybrid controller, regenerative braking for the environmentally-friendly vehicle based on the calculated amount of regenerative braking,wherein the base speed of the driving motor is a speed when characteristics of the driving motor are changed from steady power to steady torque or steady torque to steady power. 8. The method of claim 7, wherein the state of the power delivery system is whether the transmission is shifted and a current shift level, and the change state of the power delivery system is whether the transmission is shifted and shifting from the current shift level to a target shift level. 9. The method of claim 8, wherein the base speed is calculated by the following equation: NBase rpm=PwrMAX Mot/TqMAX Mot NBase rpm: Base speed (base rpm);PwrMAX Mot: Driving motor maximum power; andTqMAX Mot: Driving motor maximum torque. 10. The method of claim 9, wherein the steady power mode is a case in which a speed of the driving motor is larger than a value obtained by adding a defined first delta rpm to the base speed, and the amount of regenerative braking at the steady power mode is calculated by the following equation: GRcal_SteadyPower=ωTmInωTmOutRegenSteadyPower=Tmotor×GRcalGRcal_SteadyPower (=GRcal): Gear ratio;ωTmIn, ωTmOut: Transmission input rotation speed and output rotation speed;Tmotor: Driving motor torque; andRegenSteadyPower: Amount of regenerative braking at steady power mode. 11. The method of claim 9, wherein the steady torque mode is a case in which a speed of the driving motor is smaller than a value obtained by subtracting a defined second delta rpm from the base speed, and the amount of regenerative braking at the steady torque mode is calculated by the following equation: GRDiff=GRafter-GRbeforeα=GRDiffΔTShiftGRcal_SteadyTorque=GRbefore+∫0TShiftEndαⅆTRegenSteadyTorque=Tmotor×GRcal_SteadyTorqueGRafter, GRbefore: Gear level after shift and before shift;GRDiff: Difference in gear level;ΔTShift: Shift time;α: Gear ratio slope at steady torque mode;TShiftEnd: Shift ending time; GRcal_SteadyTorque(=ωTmInωTmOut):Gear ratio; andRegenSteadyTorque: Amount of regenerative braking at steady torque mode. 12. The method of claim 9, wherein the conversion mode is a case in which a speed of the driving motor is smaller than a value obtained by adding a first delta rpm to the base speed and larger than a value obtained by subtracting a second delta rpm from the base speed as the conversion mode, and the amount of regenerative braking at the conversion mode is calculated by the following equation: GRcal_ModeChange=GRbefore+∫0TShiftEndγdT RegenModeChange=Tmotor_virtual×GRcal_ModeChange GRcal_ModeChange: Calculated gear ratio at conversion mode;∫0TShiftEndγdT: Slope (increase in gear ratio) of γ;β: Gear ratio slope at conversion mode (mappable constant);γ: Currently used slope in α and β;Tmotor_virtual: Virtual motor torque;GRcal_ModeChange: Calculated slope at conversion mode; andRegenModeChange: Amount of regenerative braking at conversion mode. 13. A method of controlling regenerative braking for an environmentally-friendly vehicle, comprising: determining, by a hybrid controller, a presence of regenerative braking for the environmentally-friendly vehicle;calculating, by the hybrid controller, a base speed (base rpm) of a driving motor of the environmentally-friendly vehicle and a vehicle speed variation of the environmentally-friendly vehicle at the time of the regenerative braking;determining and dividing, by the hybrid controller, a steady torque area and a steady power area of the driving motor based on the calculated base speed and vehicle speed variation;determining, by the hybrid controller, whether an operating mode of the driving motor is a steady power mode, a steady torque mode, or a conversion mode depending on the divided steady torque area or steady torque area and calculating an amount of regenerative braking based on the determined result; andcontrolling, by the hybrid controller, regenerative braking for the environmentally-friendly vehicle based on the calculated amount of regenerative braking,wherein the base speed of the driving motor is a speed when characteristics of the driving motor are changed from steady power to steady torque or the steady torque to the steady power at a speed at which the characteristics of the driving motor are changed. 14. The method of claim 13, wherein the vehicle speed variation is obtained by differentiating the vehicle speed of the environmentally-friendly vehicle. 15. The method of claim 13, wherein the steady torque mode is a case in which the vehicle speed variation is larger than a predetermined first set value as a case in which the deceleration is large. 16. The method of claim 13, wherein the steady power mode is a case in which the vehicle speed variation is smaller than a predetermined second set value as a case in which the deceleration is small. 17. The method of claim 13, wherein the conversion mode is a case in which the vehicle speed variation is smaller than a predetermined first set value and larger than a predetermined second set value.
Ibaraki Ryuji,JPX ; Taga Yutaka,JPX ; Kubo Seitoku,JPX, Vehicle control apparatus adapted to charge energy storage device by generator driven by surplus engine power which chan.
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