SYSTEM AND METHOD FOR VEHICLE CONTROL IN TAILGATING SITUATIONS

• US 20180050673A1
• Filed: 10/14/2017
• Published: 02/22/2018
• Est. Priority Date: 06/23/2016
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: D'sa, Jovin, Saigusa, Shigenobu, Sato, Yoshikazu
• Granted Patent: US 10,737,667 B2
• Time in Patent Office: Days
• CPC Class Codes: B60T 13/74 with electrical assistance or drive
• CPC Class Codes: B60T 2201/022 Collision avoidance systems
• CPC Class Codes: B60T 2201/08 Lane monitoring; Lane Keeping Systems
• CPC Class Codes: B60T 2220/04 Pedal travel sensor, stroke sensor; Sensing brake request
• CPC Class Codes: B60T 7/042 by electrical means, e.g. using travel or force sensors
• CPC Class Codes: B60T 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B60T 8/3255 Systems in which the braking action is dependent on brake pedal data
• CPC Class Codes: B60T 8/58 responsive to speed and another condition or to plural speed conditions
• CPC Class Codes: B60W 2510/182 Brake pressure, e.g. of fluid or between pad and disc
• CPC Class Codes: B60W 2556/65 Data transmitted between vehicles
• CPC Class Codes: B60W 30/0953 the prediction being responsive to vehicle dynamic parameters
• CPC Class Codes: B60W 30/0956 the prediction being responsive to traffic or environmental parameters

Abstract

A computer-implemented method for braking control of a host vehicle includes detecting a panic brake operation based on a change of a braking pressure of a braking system of the host vehicle with respect to time. The method includes detecting a second vehicle driving behind the host vehicle and in the same lane as the host vehicle, and determining a time-to-collision value between the host vehicle and the second vehicle. Further, the method includes determining a deceleration rate of the host vehicle based on a driver braking pressure provided by operation of a brake pedal of the braking system. The method includes controlling the braking system based on the time-to-collision value and the deceleration rate.

Claims

1. A computer-implemented method for braking control of a host vehicle, comprising:

detecting, using one or more vehicle sensors, a panic brake operation based on a change of a braking pressure of a braking system of the host vehicle with respect to time;

detecting, using the one or more vehicle sensors, a second vehicle driving behind the host vehicle and in the same lane as the host vehicle;

determining, using the one or more vehicle sensors, a time-to-collision value between the host vehicle and the second vehicle;

determining, using the one or more vehicle sensors, a deceleration rate of the host vehicle based on a driver braking pressure provided by operation of a brake pedal of the braking system; and

controlling the braking system based on the time-to-collision value and the deceleration rate.

2. The computer-implemented method of claim 1, including determining whether the second vehicle is a tailgating vehicle based on comparing a distance between the host vehicle and the second vehicle to a tailgating headway distance threshold;

3. The computer-implemented method of claim 1, wherein controlling the braking system includes increasing the braking pressure of the braking system to an amount greater than the driver braking pressure based on the time-to-collision value and the deceleration rate.

4. The computer-implemented method of claim 1, wherein when the time-to-collision value is greater than a time-to-collision threshold and the deceleration rate is less than a deceleration rate threshold, controlling the braking system includes executing a brake boost operation by increasing the braking pressure of the braking system to an amount greater than the driver braking pressure.

5. The computer-implemented method of claim 1, wherein when the time-to-collision value is greater than a time-to-collision threshold and the deceleration rate is less than a deceleration rate threshold, controlling the braking system includes executing a brake boost operation by increasing the braking pressure of the braking system to an amount greater than the driver braking pressure to thereby increase the deceleration rate to a maximum deceleration rate.

6. The computer-implemented method of claim 1, wherein controlling the braking system includes executing a brake boost operation by increasing the braking pressure of the braking system, and communicating the brake boost operation to the second vehicle using a vehicular communication network.

7. The computer-implemented method of claim 1, wherein when the time-to-collision value is less than a time-to-collision threshold or the deceleration rate is greater than a deceleration rate threshold, controlling the braking system includes not executing a brake boost operation.

8. The computer-implemented method of claim 1, wherein when the time-to-collision value is less than a time-to-collision threshold or the deceleration rate is greater than a deceleration rate threshold, controlling the braking system includes braking the host vehicle only according to the driver braking pressure.

9. A braking system of a host vehicle, comprising:

a brake pedal;

one or more vehicle sensors; and

a processor, wherein the processor;

monitors, using the one or more vehicle sensors, a change of a braking pressure of the braking system with respect to time;

detects, using the one or more vehicle sensors, a second vehicle driving behind the host vehicle and in the same lane as the host vehicle;

determines, using the one or more vehicle sensors, a time-to-collision value between the host vehicle and the second vehicle;

determines, using the one or more vehicle sensors, a deceleration rate of the host vehicle based on a driver braking pressure provided by operation of the brake pedal; and

controls the braking system based on the time-to-collision value and the deceleration rate.

10. The braking system of the host vehicle of claim 9, wherein the processor controls the braking system by increasing the braking pressure of the braking system to an amount greater than the driver braking pressure.

11. The braking system of the host vehicle of claim 9, wherein when the processor determines the time-to-collision value is greater than a time-to-collision threshold and the deceleration rate is less than a deceleration rate threshold, the processor controls the braking system by increasing the braking pressure of the braking system to an amount greater than the driver braking pressure.

12. The braking system of the host vehicle of claim 9, wherein the processor controls the braking system by executing a brake boost operation thereby increasing the braking pressure of the braking system, and the processor communicates the brake boost operation to the second vehicle using a vehicular communication network.

13. The braking system of the host vehicle of claim 9, wherein when the processor determines the time-to-collision value is less than a time-to-collision threshold or the deceleration rate is greater than a deceleration rate threshold, the processor controls the braking system by braking the host vehicle only according to the driver braking pressure.

14. The braking system of the host vehicle of claim 9, wherein the processor detects a panic brake operation based on comparing the change of the braking pressure of the braking system with respect to time to a panic brake pressure threshold.

15. The braking system of the host vehicle of claim 14, wherein upon the processor detecting the panic brake operation has occurred, the processor initiates a brake boost operation.

16. A non-transitory computer-readable storage medium including instructions that when executed by a processor, cause the processor to:

calculate a change of a braking pressure of a braking system of a host vehicle with respect to time;

detect a panic brake operation based on the change of the braking pressure of the braking system of the host vehicle with respect to time;

detect, using one or more vehicle sensors, a second vehicle driving behind the host vehicle and in the same lane as the host vehicle;

calculate a time-to-collision value between the host vehicle and the second vehicle;

calculate a deceleration rate of the host vehicle based on a driver braking pressure provided by operation of a brake pedal of the braking system; and

control the braking system based on the time-to-collision value and the deceleration rate.

17. The non-transitory computer-readable storage medium of claim 16, wherein the processor controls the braking system by generating a braking signal that increases the braking pressure of the braking system to an amount greater than the driver braking pressure.

18. The non-transitory computer-readable storage medium of claim 16, wherein when the processor determines the time-to-collision value is greater than a time-to-collision threshold and the processor determines the deceleration rate is less than a deceleration rate threshold, the processor controls the braking system by executing a brake boost operation at the braking system thereby increasing the braking pressure of the braking system to an amount greater than the driver braking pressure.

19. The non-transitory computer-readable storage medium of claim 16, wherein the processor controls the braking system by executing a brake boost operation based on the time-to-collision value and the deceleration rate, by increasing the braking pressure of the braking system to an amount that increases the deceleration rate to a maximum deceleration rate.

20. The non-transitory computer-readable storage medium of claim 16, wherein the processor detects the panic brake operation when the change of the braking pressure of the braking system of the host vehicle with respect to time meets a panic brake pressure threshold.