System and method for controlling regenerative braking

• US 9,610,953 B2
• Filed: 02/20/2015
• Issued: 04/04/2017
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: Huh, Jee Wook, Du, Gwang Il, Kim, Sang Joon, Cho, Teh Hwan
• Primary Examiner(s): PAIGE, TYLER D
• Application Number:
  US14/627,221
• Publication Number:
  US 20160121901A1
• Time in Patent Office: 774 Days
• Field of Search: 701 22, 477 5, 303152
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 7/18 Controlling the braking effect B60L7/12, B60L7/14, B60L7/16 take precedence
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/15 Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 2510/10 Change speed gearings
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: B60W 30/19 : Improvement of gear change, e.g. by synchronisation or smoothing gear shift
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y10S 903/947 : Characterized by control of braking, e.g. blending of regeneration, friction braking

Abstract

A system and method for controlling a regenerative braking are provided. The system includes a driving information detector that is configured to detect whether a brake pedal is operated and detect shift information. In addition, a hybrid control unit is configured to fix the regenerative braking during actual shifting based on the shift information and is configured to use a required braking force when the actual shifting is not performed to calculate the regenerative braking.

Claims

1. A system for controlling a regenerative braking, comprising:

a driving information detector configured to detect whether a brake pedal is operated and detect shift information; and

a hybrid control unit configured to determine whether a required braking force is increased during actual shifting, maintain the regenerative braking during actual shifting based on the shift information when the required braking force is increased during the actual shifting and use a required braking force to calculate the regenerative braking when the actual shifting is not performed or when the required braking force is not increased during the actual shifting.

2. The system according to claim 1, wherein the hybrid control unit is configured to determine whether the required braking force is increased based on whether the brake pedal is operated during the actual shifting.

3. The system according to claim 2, wherein the hybrid control unit is configured to maintain the regenerative braking when the required braking force is increased during the actual shifting and calculate the regenerative braking when the required braking force is remains substantially constant or decreases.

4. The system according to claim 3, wherein the hybrid control unit is configured to increase an absolute amount of a pre-intervention motor torque as much as the required braking force after the actual shifting ends to calculate the regenerative braking.

5. The system according to claim 1, wherein the driving information detector includes an acceleration pedal sensor and a brake pedal sensor.

10. The method according to claim 1, wherein the driving information detector includes an acceleration pedal sensor and a brake pedal sensor.

6. A method for controlling a regenerative braking, comprising:

calculating, by a controller, a required braking force;

determining, by the controller, whether actual shifting is performed using a driving information detector;

calculating, by the controller, the regenerative braking using a pre-intervention motor torque when the actual shifting is not preformed;

determining, by the controller, whether the required braking force is increased during the actual shifting; and

maintaining, by the controller, the regenerative braking to a previously calculated regenerative braking when the required braking force is increased during the actual shifting,

wherein the controller calculates the regenerative braking using a pre-intervention motor torque when the required braking force is not increased during the actual shifting.

7. The method according to claim 6, further comprising:

calculating, by the controller, the regenerative braking using the pre-intervention motor torque when the required braking force is not increased during the actual shifting.

8. The method according to claim 7, further comprising:

calculating, by the controller, the pre-intervention motor torque using the increased required braking force and calculating the regenerative braking using the pre-intervention motor torque, when the actual shifting ends.

9. The method according to claim 8, wherein the increased required braking force is applied as a 3-stage slope when the actual shifting ends.

11. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:

program instructions that control a driving information detector to detect whether a brake pedal is operated and detect shift information; and

program instructions that determine whether a required braking force is increased during actual shifting, maintain the regenerative braking during actual shifting based on the shift information when the required braking force is increased during the actual shifting and use a required braking force to calculate the regenerative braking when the actual shifting is not performed or when the required braking force is not increased during the actual shifting.

12. The non-transitory computer readable medium of claim 11, further comprising:

program instructions that determine whether the required braking force is increased based on whether the brake pedal is operated during the actual shifting.

13. The non-transitory computer readable medium of claim 12, further comprising:

program instructions that maintain the regenerative braking when the required braking force is increased during the actual shifting and calculate the regenerative braking when the required braking force is not increased.

14. The non-transitory computer readable medium of claim 13, further comprising:

program instructions that increase an absolute amount of a pre-intervention motor torque as much as the required braking force after the actual shifting ends to calculate the regenerative braking.

15. The non-transitory computer readable medium of claim 11, wherein the driving information detector includes an acceleration pedal sensor and a brake pedal sensor.