Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication
Reexamination Certificate
2007-03-27
2007-03-27
Jeanglaude, Gertrude A. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
C701S071000, C701S072000, C701S080000, C701S090000, C073S146000, C340S442000
Reexamination Certificate
active
11039108
ABSTRACT:
System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force on the tire and means for calculating the slip parameter GOptat each activation of the means for imparting a longitudinal force on the tire in the following manner: determining coefficients A[avg/p]by direct calculation or by an appropriate regression, from a sufficient number of pairs (μi, Gi), so as to model a first curve of variation μi=f(Gi, A[avg/p]) including the origin, and the pair or pairs (μi, Gi), in which μiis different from zero, determining an indicator of the average slope α1of the first variation curve, determining coefficients B[avg/p]by direct calculation or by an appropriate regression, from a sufficient number of pairs (μi, Gi), so as to model a second variation curve, free not to pass through the origin, μi=f(Gi, B[avg/p]) including the pair or pairs (μi, Gi), in which μiis different from zero, determining an indicator of the average slope α2of the second variation curve, as long as the difference between α1and α2is below a predetermined slope threshold, repeating the previous operations for each new acquisition of the pair of values (Gi, μi), as soon as the difference between α1and α2exceeds the predetermined slope threshold and determining a target slip GCavgusing at least the last pair of values (Gi, μi).
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Fangeat Nicolas
Levy Georges
Fitzpatrick ,Cella, Harper & Scinto
Jeanglaude Gertrude A.
Michelin & Recherche et Technique S.A.
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