Brake load alleviation functions

Patent metadata

Field	Value
Publication number	US-10017164-B2
Application number	US-201815870665-A
Country	US
Kind code	B2
Filing date	Jan 12, 2018
Priority date	Sep 26, 2013
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A system, method, and apparatus for brake load alleviation amongst at least one first brake and at least one second brake is disclosed. The method involves sensing an amount of brake pedal application in response to engagement of at least brake pedal. The method further involves determining whether the amount of brake pedal application is greater than a brake pedal application threshold value. Also, the method involves generating a brake application profile, when it is determined that the amount of brake pedal application is greater than the brake pedal application threshold value. The brake application profile indicates that actuation of at least one first brake is delayed by a first time delay, and that actuation of at least one second brake is delayed by a second time delay. Further, the method involves actuating at least one first brake and at least one second brake according to the brake application profile.

First claim

We claim:

1. A method for brake load alleviation amongst at least one first brake and at least one second brake for a vehicle, the method comprising: sensing, with at least one brake pedal sensor, an amount of brake pedal application in response to engagement of at least one brake pedal; sensing, with at least one speed sensor, an amount of speed; determining, with at least one processor, whether the amount of brake pedal application is greater than a brake pedal application threshold value; determining, with the at least one processor, whether the amount of speed is greater than a speed threshold value, when the at least one processor determines that the amount of brake pedal application is greater than the brake pedal application threshold value; generating, with the at least one processor, a first brake application profile, when the at least one processor determines that the amount of speed is greater than the speed threshold value; and generating, with the at least one processor, a second brake application profile, when the at least one processor determines that the amount of speed is not greater than the speed threshold value, wherein the first brake application profile indicates that actuation of the at least one first brake is delayed by a first time delay and that actuation of the at least one second brake is delayed by a second time delay, wherein the second brake application profile indicates that actuation of the at least one first brake is delayed by a third time delay and that actuation of the at least one second brake is delayed by a fourth time delay, and wherein a difference between the first time delay and the second time delay is less than a difference between the third time delay and the fourth time delay.

2. The method of claim 1 , wherein the at least one speed sensor is at least one of a wheel speed sensor or a vehicle speed sensor.

3. The method of claim 1 , wherein the speed threshold value is one of a wheel speed threshold value or a vehicle speed threshold value.

4. The method of claim 1 , wherein the method further comprises actuating the at least one first brake and the at least one second brake according to one of the first brake application profile or the second brake application profile.

5. The method of claim 1 , wherein the first brake application profile indicates that actuation of the at least one first brake increases at a first rate over time and that actuation of the at least one second brake increases at a second rate over time.

6. The method of claim 1 , wherein the second brake application profile indicates that actuation of the at least one first brake increases at a first rate over time and that actuation of the at least one second brake increases at a second rate over time.

7. The method of claim 1 , wherein the at least one first brake is at least one forward brake, and wherein the at least one second brake is at least one aft brake.

8. The method of claim 1 , wherein the at least one first brake is at least one aft brake, and wherein the at least one second brake is at least one forward brake.

9. The method of claim 1 , wherein the amount of brake pedal application is related to a rate of engagement of the at least one brake pedal.

10. The method of claim 9 , wherein the rate of the engagement of the at least one brake pedal is related to an amount of braking force applied to the at least one brake pedal and/or is related to a degree that the at least one brake pedal is depressed.

11. A system for brake load alleviation amongst at least one first brake and at least one second brake for a vehicle, the system comprising: at least one brake pedal; at least one brake pedal sensor to sense an amount of brake pedal application in response to engagement of the at least one brake pedal; at least one wheel; at least one wheel speed sensor to sense an amount of wheel speed of the at least one wheel; and at least one processor to generate a first brake application profile and a second brake application profile, to determine whether the amount of brake pedal application is greater than a brake pedal application threshold value, to determine whether the amount of wheel speed is greater than a wheel speed threshold value when the at least one processor determines that the amount of brake pedal application is greater than the brake pedal application threshold value, to apply a first brake application profile when the at least one processor determines that the wheel speed is greater than the wheel speed threshold value, and to apply a second brake application profile when the at least one processer determines that the wheel speed is not greater than the wheel speed threshold value, wherein the first brake application profile indicates that the actuation of the at least one first brake is delayed by a first time delay and that actuation of the at least one second brake is delayed by a second time delay, wherein the second brake application profile indicates that actuation of the at least one first brake is delayed by a third time delay and that actuation of the at least one second brake is delayed by a fourth time delay, and wherein a difference between the first time delay and the second time delay is less than a different between the third time delay and the fourth time delay.

12. The system for brake load alleviation of claim 11 , further comprising the at least one first brake and the at least one second brake.

13. The system for brake load alleviation of claim 11 , wherein the first brake application profile indicates that actuation of at least one first brake increases at a first rate over time.

14. The system for brake load alleviation of claim 13 , wherein the first brake application profile further indicates that actuation of the at least one second brake increases at a second rate over time.

15. The system for brake load alleviation of claim 11 , wherein the second brake application profile indicates that actuation of at least one first brake increases at a first rate over time.

16. The system for brake load alleviation of claim 15 , wherein the second brake application profile further indicates that actuation of the at least one second brake increases at a second rate over time.

17. The system for brake load alleviation of claim 11 , wherein the amount of brake pedal application is related to a rate of engagement of the at least one brake pedal.

18. The system for brake load alleviation of claim 17 , wherein the rate of the engagement of the at least one brake pedal is related to an amount of braking force applied to the at least one brake pedal and/or is related to a degree that the at least one brake pedal is depressed.

19. The system for brake load alleviation of claim 11 , wherein the at least one first brake is at least one forward brake, and wherein the at least one second brake is at least one aft brake.

20. The system for brake load alleviation of claim 11 , wherein the at least one first brake is at least one aft brake, and wherein the at least one second brake is at least one forward brake.

Assignees

• Boeing Co

Inventors

• Kanemori Scott Brandon
• Lam Bruce
• Yamamoto David T
• Griffith Thomas Todd

Classifications

• B60T2201/03

  Brake assistants · CPC title

• B60T8/00

  Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force (by changing number of effective brake cylinders in power brake systems B60T17/10) · CPC title

• B64C25/42 Primary

  Arrangement or adaptation of brakes · CPC title

• B60T8/1703 Primary

  for aircrafts · CPC title

• B60T8/325

  Systems specially adapted for aircraft · CPC title