Vehicle control apparatus for a regenerative braking system based on the battery input power

• US 10,239,530 B2
• Filed: 06/17/2015
• Issued: 03/26/2019
• Est. Priority Date: 06/25/2014
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yamaguchi, Takuya, Kawai, Takashi
• Primary Examiner(s): Williams, Thomas J
• Application Number:
  US15/320,573
• Publication Number:
  US 20170137031A1
• Time in Patent Office: 1,378 Days
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 7/16 for vehicles comprising converters between the power source and the motor
• CPC Class Codes: B60L 7/26 Controlling the braking effect
• CPC Class Codes: B60T 13/586 the retarders being of the electric type
• CPC Class Codes: B60T 8/50 having means for controlling the rate at which pressure is reapplied to or released from the brake
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/188 hydraulic brakes
• CPC Class Codes: B60W 2510/085 Power
• CPC Class Codes: B60W 2710/182 Brake pressure, e.g. of fluid or between pad and disc
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A vehicle control apparatus is a vehicle control apparatus controlling a vehicle and provided with a regenerative device generating electric power while applying a regenerative braking force by performing regenerative electric power generation, an electric power supply capable of exchanging electric power with the regenerative device, and a hydraulic device applying a hydraulic braking force attributable to a hydraulic pressure, and is provided with an electronic control device controlling the regenerative device and the hydraulic device so as to adjust the ratios of the regenerative braking force and the hydraulic braking force to a required braking force required for the braking of the vehicle based on an input electric power value input into the electric power supply.

Claims

1. A vehicle control apparatus comprising:

a regenerative device configured to generate electric power by performing regenerative operation, while applying a regenerative braking force;

an electric power supply configured to exchange electric power with the regenerative device;

a hydraulic device configured to apply a hydraulic braking force attributable to a hydraulic pressure; and

an electronic control device configured to control the regenerative device and the hydraulic device so as to adjust a regenerative brake ratio represented as regenerative brake torque/required braking torque with respect to a required braking force required for the braking of the vehicle, based on an input electric power value showing magnitude of the electric power inputted into the electric power supply, wherein

the electronic control device is configured to control the regenerative device and the hydraulic device such that the regenerative brake ratio becomes zero before the input electric power value becomes zero or at the same time as the input electric power value becomes zero.

2. The vehicle control apparatus according to claim 1, wherein the electronic control device is configured to control the regenerative device and the hydraulic device such that the regenerative brake ratio becomes zero in a case where the input electric power value satisfies a predetermined condition.

3. The vehicle control apparatus according to claim 1, wherein the electronic control device is configured to control the regenerative device and the hydraulic device such that the regenerative brake ratio becomes zero in a case where the input electric power value becomes equal to or less than a first predetermined amount, the first predetermined amount being equal to or greater than zero.

4. The vehicle control apparatus according to claim 1,

wherein the electronic control device is configured to:

(i) control the regenerative device and the hydraulic device such that the regenerative brake ratio becomes constant, regardless of the input electric power value, in a case where the input electric power value is equal to or greater than a second predetermined amount, and

(ii) control the regenerative device and the hydraulic device such that the regenerative brake ratio decreases as the input electric power value decreases in a case where the input electric power value is less than the second predetermined amount.

5. The vehicle control apparatus according to claim 1, wherein the electronic control device is configured to control the regenerative device and the hydraulic device so as to adjust the regenerative brake ratio based on the input electric power value and the required braking force.

6. The vehicle control apparatus according to claim 5, wherein the electronic control device is configured to control the regenerative device and the hydraulic device such that a timing when the regenerative brake ratio begins to decrease is advanced as the required braking force increases.

7. The vehicle control apparatus according to claim 1, wherein the electronic control device is configured to control the regenerative brake ratio based on speed of the vehicle.

8. The vehicle control apparatus according to claim 1, wherein the electronic control device is configured to further control the regenerative device and the hydraulic device such that the regenerative brake ratio decreases as the input electric power value decreases.

9. A vehicle control apparatus comprising:

a regenerative device configured to generate electric power by performing regenerative operation, while applying a regenerative braking force;

an electric power supply configured to exchange electric power with the regenerative device;

a hydraulic device configured to apply a hydraulic braking force attributable to a hydraulic pressure;

an acquisition device configured to acquire an input electric power value showing magnitude of the electric power inputted into the electric power supply; and

an electronic control device configured to control the regenerative device and the hydraulic device so as to adjust a regenerative brake ratio represented as regenerative brake torque/required braking torque with respect to a required braking force based on the input electric power value acquired by the acquisition device, the required braking force being required for the braking of the vehicle,

wherein the electronic control device is configured to control the regenerative device and the hydraulic device such that the regenerative brake ratio becomes zero before the input electric power value becomes zero or at the same time as the input electric power value becomes zero.

10. The vehicle control apparatus according to claim 9, wherein the electronic control device is configured to further control the regenerative device and the hydraulic device such that the regenerative brake ratio decreases as the input electric power value decreases.

11. A vehicle control apparatus comprising:

a regenerative device configured to generate electric power by performing regenerative operation;

an electric power supply configured to exchange electric power with the regenerative device; and

an electronic control device configured to control the regenerative device so as to adjust the electric power generated by the regenerative device, based on an input electric power value showing magnitude of the electric power inputted into the electric power supply,

wherein the electronic control device is configured to control the regenerative device such that a regenerative brake ratio represented as regenerative brake torque/required braking torque becomes zero before the input electric power value becomes zero or at the same time as the input electric power value becomes zero.

12. The vehicle control apparatus according to claim 11, further comprising:

a hydraulic device configured to apply a hydraulic braking force attributable to a hydraulic pressure, wherein

the regenerative device is configured to generate the electric power by performing the regenerative operation, while applying the regenerative braking force, and

the electronic control device is configured to control the regenerative device and the hydraulic device so as to adjust the electric power generated by the regenerative device by adjusting the regenerative brake ratio with respect to a required braking force required for the braking of the vehicle based on the input electric power value.

13. The vehicle control apparatus according to claim 11, wherein the electronic control device is configured to further control the regenerative device and the hydraulic device such that the regenerative brake ratio decreases as the input electric power value decreases.

14. A vehicle control apparatus comprising:

a regenerative device configured to generate electric power by performing regenerative operation;

an electric power supply configured to exchange electric power with the regenerative device;

an acquisition device configured to acquire an input electric power value showing magnitude of the electric power inputted into the electric power supply; and

an electronic control device configured to control the regenerative device so as to adjust the electric power generated by the regenerative device, based on the input electric power value acquired by the acquisition device,

wherein the electronic control device is configured to control the regenerative device such that a regenerative brake ratio represented as regenerative brake torque/required braking torque becomes zero before the input electric power value becomes zero or at the same time as the input electric power value becomes zero.

15. The vehicle control apparatus according to claim 14, wherein the electronic control device is configured to further control the regenerative device and the hydraulic device such that the regenerative brake ratio decreases as the input electric power value decreases.