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 Title: |
EP0958978A2:
Gierwinkelregelverfahren für Kraftfahrzeuge[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
A2 APPLICATION PUBLISHED WITHOUT SEARCH REPORT i
(See also:
EP0958978A3,
EP0958978B1 )
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| Inventor: |
Ghoneim, Youssef Ahmed;
Sidlosky, David M.;
Lin, William C.;
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| Assignee: |
GENERAL MOTORS CORPORATION
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| Published / Filed: |
1999-11-24
/ 1999-03-23
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| Application Number: |
EP1999000105863
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| IPC Code: |
Advanced:
B60T 8/1755;
IPC-7:
B60T 8/00;
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| ECLA Code: |
B60T8/1755; L60T250/03; L60T270/313;
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| Priority Number: |
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| Abstract: |
A vehicle yaw control method utilizing differential braking of the vehicle wheels to impart a desired yaw moment on the vehicle, the vehicle having a pair of un-driven wheels, the method comprising the steps of: measuring speeds of the un-driven wheels of the vehicle (28, 30, 32, 34); estimating a yaw rate of the vehicle based on a difference between the measured speeds (134); analyzing known vehicle parameters including the measured wheel speeds, a yaw error based on deviation of the estimated yaw rate from a desired yaw rate, vehicle steering angle, and presence of driver braking to determine when the estimated yaw rate is valid and when the estimated yaw rate is invalid (104); differentially braking the vehicle wheels to impart a yaw moment based on the deviation of the estimated yaw rate from the desired yaw rate when the estimated yaw rate is determined to be valid (108, 110, 112, 114, 116); and differentially braking the vehicle wheels to impart a yaw moment based on the desired yaw rate without regard to the estimated yaw rate when the estimated yaw rate is determined to be invalid (118, 120, 114, 116)..
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
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| Family: |
Show 6 known family members
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First Claim:
Show all claims |
1. A vehicle yaw control method utilizing differential braking of the vehicle wheels to impart a desired yaw moment on the vehicle, the vehicle having a pair of un-driven wheels, the method comprising the steps of:
- measuring speeds of the un-driven wheels of the vehicle (28, 30, 32, 34);
- estimating a yaw rate of the vehicle based on a difference between the measured speeds (134);
- analyzing known vehicle parameters including the measured wheel speeds, a yaw error based on deviation of the estimated yaw rate from a desired yaw rate, vehicle steering angle, and presence of driver braking to determine when the estimated yaw rate is valid and when the estimated yaw rate is invalid (104);
- differentially braking the vehicle wheels to impart a yaw moment based on the deviation of the estimated yaw rate from the desired yaw rate when the estimated yaw rate is determined to be valid (108, 110, 112, 114, 116); and
- differentially braking the vehicle wheels to impart a yaw moment based on the desired yaw rate without regard to the estimated yaw rate when the estimated yaw rate is determined to be invalid (118, 120, 114, 116).
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Description
Expand description |
This invention relates to vehicle yaw control method.
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