System to determine the intent to brake and to provide initiation and engagement of the brake system

• US 6,677,855 B2
• Filed: 08/24/2001
• Issued: 01/13/2004
• Est. Priority Date: 08/24/2001
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Rupp, Jeffrey Dan, Joyce, John Patrick, Engelman, Gerald H., Brown, Leonard Murray
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US09/682,364
• Publication Number:
  US 20030038715A1
• Time in Patent Office: 872 Days
• Field of Search: 340/43, 340/9-441, 340/464, 340/467, 340/479, 303/7, 303/122.05, 303/15, 303/9.62, 73/9, 731/181
• US Class Current: 340/439
• CPC Class Codes: B60Q 1/44 for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
• CPC Class Codes: B60T 8/4854 pneumatic boosters
• CPC Class Codes: B60T 8/4872 pump-back systems
• CPC Class Codes: B60T 8/489 using separate traction control modulators

Abstract

An early braking system for a vehicle having wheels comprising, a friction element, a brake pedal and a sensor. The friction element inhibits rotation of the wheels of the vehicle with the braking system having a dormant state wherein the friction element is at a first position spaced a first distance from the wheels. The brake pedal is adapted to be depressed to move the friction element into engagement with a portion of the wheels of the vehicle. The sensor senses an operational parameter of the vehicle. The friction element moves from the first position to a second position spaced a second distance from the wheels in response to a predetermined measurement of the operational parameter and before depression of the brake pedal, wherein the second position is closer to the wheels than the first position.

Claims

1. An early braking system for a vehicle comprising:

wheels for the vehicle;

a braking system including a friction element for inhibiting rotation of the wheels of the vehicle, the braking system having a dormant state wherein the friction element is at a first position spaced a first distance from the wheels, the braking system further including a brake pedal adapted to be depressed to move the friction element into engagement with a portion of the wheels of the vehicle; and

a sensor for sensing an operational parameter of the vehicle;

wherein the friction element moves from the first position to a second position spaced a second distance from the wheels in response to a predetermined measurement of the operational parameter and before depression of the brake pedal, the second position being closer to the wheels than the first position.

2. The early braking system of claim 1, wherein:

the operational parameter is the position of a foot of a driver of the vehicle.

3. The early braking system of claim 2, further comprising:

a throttle configured to be engaged by the foot of the driver of the vehicle;

wherein the sensor senses the position of the throttle for sensing the position of the foot of the driver of the vehicle.

4. The early braking system of claim 1, further including:

a throttle for the vehicle;

wherein the operational parameter includes positions of the throttle.

5. The early braking system of claim 4, wherein:

the operational parameter is a measurement of the throttle between a first throttle position and a second throttle position, and the predetermined measurement is the rate of movement of the throttle between the first throttle position and the second throttle position.

6. The early braking system of claim 1, wherein:

the friction element moves from the second position to the first position if the brake pedal has not been depressed a predetermined time after the predetermined measurement of the operational parameter.

7. The early braking system of claim 1, further including:

a brake light having a non-energized state wherein no energy is applied to the brake light, an energized state wherein a high energy is applied to the brake light such that the brake light emits visible light, and a pre-energized state wherein a low energy is applied to the brake light whereby the brake light does not emit visible light;

wherein the brake light is energized to the pre-energized state in response to the predetermined measurement of the operational parameter.

8. The early braking system of claim 7, wherein:

the brake light moves from the pre-energized state to the non-energized state if the brake pedal has not been depressed a predetermined time after the predetermined measurement of the operational parameter.

9. An early brake warning system for a vehicle comprising:

a throttle for the vehicle;

a sensor for sensing an operational parameter of the throttle; and

a brake light having a non-energized state wherein no energy is applied to the brake light, an energized state wherein a high energy is applied to the brake light such that the brake light emits visible light and a pre-energized state wherein a low energy is applied to the brake light whereby the brake light does not emit visible light;

wherein the brake light is energized from the non-energized state to the pre-energized state in response to a predetermined measurement of the operational parameter of the throttle.

10. The early brake warning system of claim 9, wherein:

the operational parameter of the throttle is a measurement of the throttle between a first throttle position and a second throttle position, and the predetermined measurement is the rate of movement of the throttle between the first throttle position and the second throttle position.

11. The early brake warning system of claim 10, wherein:

the braking system includes a brake pedal adapted to be depressed to energize the brake light to the energized state; and

the brake light moves from the pre-energized state to the non-energized state if the brake pedal has not been depressed a predetermined time after the predetermined measurement of the operational parameter of the throttle has been sensed.

12. The early brake warning system of claim 9, further including:

a braking system including a friction element for inhibiting rotation of wheels of the vehicle, the braking system having a dormant state wherein the friction element is configured to be at a first position spaced a first distance from the wheels;

wherein the friction element moves from the first position to a second position in response to a predetermined measurement of the operational parameter and before depression of the brake pedal, the second position being configured to be closer to the wheels than the first position.

13. A method of initiating braking for a vehicle having wheels, the method comprising the steps of:

providing a braking system including a friction element for inhibiting rotation of the wheels of the vehicle, the braking system further including a brake pedal adapted to be depressed to move the friction element into engagement with a portion of the wheels of the vehicle, the braking system having a dormant state wherein the friction element is at a first position spaced a first distance from the wheels;

sensing an operational parameter of the vehicle with a sensor; and

moving the friction element from the first position to a second position spaced a second distance from the wheels in response to a predetermined measurement of the operational parameter and before depression of the brake pedal, the second position being closer to the wheels than the first position.

14. The method of initiating braking for a vehicle of claim 13, wherein the operational parameter is the position of a foot of a driver of the vehicle.

15. The method of initiating braking for a vehicle of claim 14, further comprising:

providing a throttle configured to be engaged by the foot of the driver of the vehicle;

wherein the step of sensing comprises sensing positions of the throttle for determining the operational parameter of the vehicle.

16. The method of initiating braking for a vehicle of claim 13, further including:

providing a throttle for the vehicle;

wherein the operational parameter includes positions of the throttle.

17. The method of initiating braking for a vehicle of claim 16, wherein:

the operational parameter is a measurement of the throttle between a first throttle position and a second throttle position, and the predetermined measurement is the rate of movement of the throttle between the first throttle position and the second throttle position.

18. The method of initiating braking for a vehicle of claim 13, further including:

moving the friction element from the second position to the first position if the brake pedal has not been depressed a predetermined time after the predetermined measurement of the operational parameter.

19. The method of initiating braking for a vehicle of claim 13, further including:

providing a brake light, the brake light having a non-energized state wherein no voltage is applied to the brake light, an energized state wherein a high voltage is applied to the brake light such that the brake light emits visible light and a pre-energized state wherein a low voltage is applied to the brake light wherein the brake light does not emit visible light; and

energizing the brake light to the pre-energized state in response to the predetermined measurement of the operational parameter.

20. The method of initiating braking for a vehicle of claim 19, further including:

energizing the brake light from the pre-energized state to the non-energized state if the brake pedal has not been depressed a predetermined time after the predetermined measurement of the operational parameter.