ABS yaw control with yaw rate sensor

• US 20040201272A1
• Filed: 04/08/2003
• Published: 10/14/2004
• Est. Priority Date: 04/08/2003
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: OʼDea, Kevin A.
• Application Number:
  US10/408,875
• Publication Number:
  US 20040201272A1
• Time in Patent Office: Days
• US Class Current: 303/146
• CPC Class Codes: B60T 8/1755 Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02
• CPC Class Codes: B60T 8/17616 Microprocessor-based systems
• CPC Class Codes: B60T 8/1764 Regulation during travel on surface with different coefficients of friction, e.g. between left and right sides, mu-split or between front and rear

Abstract

A system and method of controlling a brake system of a vehicle comprising determining a coefficient condition; determining vehicle yaw; determining a driver'"'"'s corrective action; and determining a brake pressure control response based on the coefficient condition, vehicle yaw and the driver'"'"'s corrective action.

Claims

1. A method of controlling a brake system of a vehicle, the method comprising:

determining a coefficient condition;

determining vehicle yaw;

determining a driver'"'"'s corrective action;

determining a brake pressure control response based on the coefficient condition, vehicle yaw, and the driver'"'"'s corrective action.

2. The method of claim 1 wherein determining the driver'"'"'s corrective action comprises comparing a steering angle to a predetermined constant.

3. The method of claim 1 wherein determining the vehicle yaw comprises comparing a yaw rate input to a predetermined constant.

4. The method of claim 1 wherein determining the coefficient condition comprises determining if a high coefficient condition or a low coefficient condition is present.

5. The method of claim 1 further comprising:

determining a split coefficient surface event; and

determining the coefficient condition responsive to the split coefficient surface event determination.

6. The method of claim 5 wherein determining a brake pressure response comprises determining a plurality of pressure control signals to be sent to wheel brake systems over a duration of the split coefficient surface event.

7. The method of claim 6 wherein determining a brake pressure control response comprises:

determining the wheel brake system corresponding to the coefficient condition;

measuring a current brake pressure based on the corresponding brake system determination; and

setting a maximum allowed brake pressure for the wheel brake system based on the corresponding brake system determination, the vehicle yaw and the driver'"'"'s corrective action.

9. The method of claim 6 wherein determining a brake pressure control response comprises:

modifying the maximum allowed brake pressure for the wheel brake system based on the vehicle yaw and the driver'"'"'s corrective action;

comparing the current brake pressure for the wheel brake system to the maximum allowed brake pressure for the wheel brake system; and

adjusting the current brake pressure for the wheel brake system responsive to the brake pressure comparison.

10. The method of claim 6 wherein determining a brake pressure control response comprises:

modifying the maximum allowed brake pressure for the wheel brake system based on the vehicle yaw and the driver'"'"'s corrective action;

determining if a wheel brake system is in ABS mode; and

adjusting the current brake pressure for the wheel brake system responsive to the ABS mode determination.

25. The method of claim 1 wherein the driver'"'"'s corrective action is selected from the group consisting of “

driver is correcting” and

“

driver not correcting”

.

8. (cancelled)

11. A computer readable medium storing a computer program for controlling the brake system of a vehicle comprising computer readable code for determining a coefficient condition;

computer readable code for determining vehicle yaw;

computer readable code for determining a driver'"'"'s corrective action; and

computer readable code for determining a brake pressure control response based on the coefficient condition, vehicle yaw and the driver'"'"'s corrective action.

12. The computer readable medium of claim 11 wherein the computer readable code for determining the driver'"'"'s corrective action comprises computer readable code for comparing a steering angle to a predetermined constant.

13. The computer readable medium of claim 11 wherein the computer readable medium for determining the vehicle yaw comprises computer readable code for comparing a yaw rate input to a predetermined constant.

14. The computer readable medium of claim 11 wherein the computer readable code for determining the coefficient condition comprises computer readable code for determining if a high coefficient condition or a low coefficient condition is present.

15. The computer readable medium of claim 11 further comprising:

computer readable code for determining a split coefficient surface event; and

computer readable code for determining the coefficient condition responsive to the event determination.

16. The computer readable medium of claim 15 wherein the computer readable code for determining a brake pressure response comprises computer readable code for determining a plurality of pressure control signals to be sent to wheel brake systems over a duration of the split coefficient surface event.

17. The computer readable medium of claim 16 wherein the computer readable code for determining a brake pressure control response comprises:

computer readable code for determining the wheel brake system corresponding to the coefficient condition;

computer readable code for measuring a current brake pressure based on the corresponding brake system determination; and

computer readable code for setting a maximum allowed brake pressure for the wheel brake system based on the corresponding brake system determination, the vehicle yaw and the driver'"'"'s corrective action.

19. The computer readable medium of claim 16 wherein the computer readable code for determining a brake pressure control response comprises:

computer readable code for modifying the maximum allowed brake pressure for the wheel brake system based on the vehicle yaw and the driver'"'"'s corrective action;

computer readable code for comparing the current brake pressure for the wheel brake system to the maximum allowed brake pressure for the wheel brake system; and

computer readable code for adjusting the current brake pressure for the wheel brake system responsive to the brake pressure comparison.

20. The computer readable medium of claim 16 wherein the computer readable code for determining a brake pressure control response comprises:

computer readable code for modifying the maximum allowed brake pressure for the wheel brake system based on the vehicle yaw and the driver'"'"'s corrective action;

computer readable code for determining if a wheel brake system is in ABS mode; and

computer readable code for adjusting the current brake pressure for the wheel brake system responsive to the ABS mode determination.

18. (cancelled)

21. A system for controlling a brake system of a vehicle comprising:

means for determining a coefficient condition;

means for determining vehicle yaw;

means for determining a driver'"'"'s corrective action; and

means for determining a brake pressure control response based on the coefficient condition;

vehicle yaw and the driver'"'"'s corrective action.

22. A method of controlling a brake system of a vehicle, wherein the vehicle comprises a plurality of wheel brake systems, the method comprising:

determining a coefficient condition at each wheel brake system;

determining vehicle yaw;

determining a driver'"'"'s corrective action;

determining a brake pressure control response at each of the plurality of wheel brake systems based on the coefficient condition and vehicle yaw responsive to the driver'"'"'s corrective action.

23. A computer readable medium storing a computer program for controlling the brake system of a vehicle, wherein the vehicle comprises a plurality of wheel brake systems, the computer readable medium comprising:

computer readable code for determining a coefficient condition at each wheel brake system;

computer readable code for determining vehicle yaw;

computer readable code for determining a driver'"'"'s corrective action; and

computer readable code for determining a brake pressure control response at each of the plurality of wheel brake systems based on the coefficient condition and vehicle yaw responsive to the driver'"'"'s corrective action.

24. A system for controlling a brake system of a vehicle, wherein the vehicle comprises a plurality of wheel brake systems, the system comprising:

means for determining a coefficient condition at each wheel brake system;

means for determining vehicle yaw;

means for determining a driver'"'"'s corrective action; and

means for determining a brake pressure control response at each of the plurality of wheel brake systems based on the coefficient condition and vehicle yaw responsive to the driver'"'"'s corrective action.