BRAKING CONTROL SYSTEM FOR VEHICLE

• US 20170043753A1
• Filed: 10/31/2016
• Published: 02/16/2017
• Est. Priority Date: 11/19/2012
• Status: Active Grant

• Current Assignee: Magna Electronics Incorporated (Magna International Incorporated)
• Original Assignee: Magna Electronics Incorporated (Magna International Incorporated)
• Inventors: Johnson, Nathaniel S., Chundrlik, Jr., William J., VanOphem, Paul A., Van Dan Elzen, Christopher L.
• Granted Patent: US 10,023,161 B2
• Time in Patent Office: Days
• CPC Class Codes: B60T 2201/022 Collision avoidance systems
• CPC Class Codes: B60T 2210/32 Vehicle surroundings
• 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: B60W 2030/082 Vehicle operation after collision

Abstract

An automatic emergency braking system for a vehicle includes a forward viewing camera and a control. At least in part responsive to processing of captured image data, the presence of another vehicle closing on the subject vehicle is determined, and a relative speed of the subject vehicle relative to the other vehicle is also determined. Responsive at least in part to a speed of the subject vehicle and the determined relative speed, the control controls the subject vehicle'"'"'s brake system. Responsive to determination that the driver of the subject vehicle is impaired, the automatic emergency braking system does not allow the driver to override the control'"'"'s control of the subject vehicle'"'"'s brake system. Responsive to a determination that the driver of the subject vehicle is not impaired, the automatic emergency braking system allows the driver to override the control'"'"'s control of the subject vehicle′ brake system.

Claims

1. An automatic emergency braking system for a vehicle, said automatic emergency braking system comprising:

a forward viewing camera that is configured to be disposed behind a windshield of a subject vehicle so as to view forwardly through the windshield;

a control;

said control comprising an image processor operable to process image data captured by said forward viewing camera when said forward viewing camera is disposed behind the windshield of the subject vehicle;

wherein said control is operable to control a brake system of the subject vehicle;

wherein, at least in part responsive to processing by said image processor of captured image data, the presence of another vehicle present in the field of view of said forward viewing camera and closing on the subject vehicle is determined;

wherein, at least in part responsive to processing by said image processor of captured image data, a relative speed of the subject vehicle relative to the other vehicle is determined, and, responsive at least in part to a speed of the subject vehicle and the determined relative speed, said control controls the brake system of the subject vehicle;

wherein said automatic emergency braking system determines if a driver of the subject vehicle is impaired; and

wherein, responsive to determination that the driver of the subject vehicle is impaired, said automatic emergency braking system does not allow the driver to override said control'"'"'s control of the brake system of the subject vehicle, and wherein, responsive to a determination that the driver of the subject vehicle is not impaired, said automatic emergency braking system allows the driver to override said control'"'"'s control of the brake system of the subject vehicle.

2. The automatic emergency braking system of claim 1, wherein said control is operable to control the brake system of the subject vehicle by applying the brakes of the subject vehicle.

3. The automatic emergency braking system of claim 2, wherein, after said automatic emergency braking system applies the brakes of the subject vehicle, said control releases the brakes of the brake system of the subject vehicle responsive to a determination that the subject vehicle is not moving.

4. The automatic emergency braking system of claim 2, wherein said control controls the brake system of the subject vehicle responsive to the speed of the subject vehicle being greater than a threshold speed and the determined relative speed being greater than a threshold value.

5. The automatic emergency braking system of claim 4, wherein said automatic emergency braking system determines if the driver of the subject vehicle is impaired at least in part responsive to a cabin monitoring system of the subject vehicle.

6. The automatic emergency braking system of claim 5, wherein the cabin monitoring system comprises an interior viewing camera having a field of view that encompasses the driver of the subject vehicle, and wherein said automatic emergency braking system determines if the driver of the subject vehicle is impaired at least in part responsive to image processing of image data captured by the interior viewing camera.

7. The automatic emergency braking system of claim 1, wherein said automatic emergency braking system determines if the driver of the subject vehicle is impaired at least in part responsive to a driving characteristic of the driver of the subject vehicle.

8. The automatic emergency braking system of claim 1, wherein said automatic emergency braking system determines that the driver of the subject vehicle is impaired at least in part responsive to a determination of driver behavior.

9. The automatic emergency braking system of claim 8, wherein said automatic emergency braking system determines driver behavior responsive to braking of the subject vehicle.

10. The automatic emergency braking system of claim 8, wherein said automatic emergency braking system determines driver behavior responsive to acceleration of the subject vehicle.

11. The automatic emergency braking system of claim 8, wherein said automatic emergency braking system determines driver behavior responsive to steering of the subject vehicle.

12. The automatic emergency braking system of claim 2, wherein said automatic emergency braking system determines time-to-collision between the subject vehicle and the other vehicle.

13. The automatic emergency braking system of claim 12, wherein time-to-collision between the subject vehicle and the other vehicle is determined by a ranging sensor of the equipped vehicle.

14. The automatic emergency braking system of claim 13, wherein the ranging sensor of the equipped vehicle comprises a radar sensor.

15. The automatic emergency braking system of claim 12, wherein time-to-collision between the subject vehicle and the other vehicle is determined at least in part responsive to processing by said image processor of captured image data.

16. An automatic emergency braking system for a vehicle, said automatic emergency braking system comprising:

a forward viewing camera that is configured to be disposed behind a windshield of a subject vehicle so as to view forwardly through the windshield;

a control;

said control comprising an image processor operable to process image data captured by said forward viewing camera when said forward viewing camera is disposed behind the windshield of the subject vehicle;

wherein said control is operable to control a brake system of the subject vehicle;

wherein said control is operable to control the brake system of the subject vehicle by applying the brakes of the subject vehicle;

wherein, at least in part responsive to processing by said image processor of captured image data, the presence of another vehicle present in the field of view of said forward viewing camera and closing on the subject vehicle is determined;

wherein, at least in part responsive to processing by said image processor of captured image data, a relative speed of the subject vehicle relative to the other vehicle is determined, and, responsive at least in part to a speed of the subject vehicle and the determined relative speed, said control controls the brake system of the subject vehicle;

wherein said automatic emergency braking system determines if a driver of the subject vehicle is impaired;

wherein, responsive to determination that the driver of the subject vehicle is impaired, said automatic emergency braking system does not allow the driver to override said control'"'"'s control of the brake system of the subject vehicle, and wherein, responsive to a determination that the driver of the subject vehicle is not impaired, said automatic emergency braking system allows the driver to override said control'"'"'s control of the brake system of the subject vehicle; and

wherein said automatic emergency braking system determines time-to-collision between the subject vehicle and the other vehicle.

17. The automatic emergency braking system of claim 16, wherein time-to-collision between the subject vehicle and the other vehicle is determined by a radar sensor.

18. The automatic emergency braking system of claim 17, wherein time-to-collision between the subject vehicle and the other vehicle is determined at least in part responsive to processing by said image processor of captured image data.

19. The automatic emergency braking system of claim 16, wherein, after said automatic emergency braking system applies the brakes of the subject vehicle, said control releases the brakes of the brake system of the subject vehicle responsive to a determination that the subject vehicle is not moving.

20. An automatic emergency braking system for a vehicle, said automatic emergency braking system comprising:

a forward viewing camera that is configured to be disposed behind a windshield of a subject vehicle so as to view forwardly through the windshield;

a control;

said control comprising an image processor operable to process image data captured by said forward viewing camera when said forward viewing camera is disposed behind the windshield of the subject vehicle;

wherein said control is operable to control a brake system of the subject vehicle;

wherein, at least in part responsive to processing by said image processor of captured image data, the presence of another vehicle present in the field of view of said forward viewing camera and closing on the subject vehicle is determined;

wherein, at least in part responsive to processing by said image processor of captured image data, a relative speed of the subject vehicle relative to the other vehicle is determined, and, responsive at least in part to a speed of the subject vehicle and the determined relative speed, said control controls the brake system of the subject vehicle;

wherein said automatic emergency braking system determines if a driver of the subject vehicle is impaired;

wherein, responsive to determination that the driver of the subject vehicle is impaired, said automatic emergency braking system does not allow the driver to override said control'"'"'s control of the brake system of the subject vehicle, and wherein, responsive to a determination that the driver of the subject vehicle is not impaired, said automatic emergency braking system allows the driver to override said control'"'"'s control of the brake system of the subject vehicle; and

wherein said automatic emergency braking system determines if the driver of the subject vehicle is impaired at least in part responsive to at least one of (i) a cabin monitoring system of the subject vehicle and (ii) a determination of driver behavior.

21. The automatic emergency braking system of claim 20, wherein said automatic emergency braking system determines time-to-collision between the subject vehicle and the other vehicle.