Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2004-09-07
2008-09-02
Nguyen, Cuong H (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S079000, C701S089000, C180S197000, C180S248000
Reexamination Certificate
active
07421328
ABSTRACT:
A vehicle slip state determination system serves to calculate an estimated vehicle speed VB, an estimated vehicle deceleration in the vehicle speed DVB, and each of wheel speed differences between right front and rear wheels and between left front and rear wheels ΔVR, ΔVL, respectively. The wheel speed difference ΔVR, ΔVL are divided into three ranges, that is, range1, range2, and range3by the speed difference upper and lower limit values JVUP and JVLO, each of which is a linear function value with respect to the estimated vehicle deceleration DVB. In the ranges1and3, the vehicle traveling on the road with the low friction coefficient μ is brought into the slip state where four wheels are slipped. If the wheel speed difference at a predetermined estimated vehicle deceleration deviates from a determination range defined by the upper and lower limit values, the slip state of the vehicle, that is, the condition where the vehicle is traveling on the road with the low friction coefficient μ is determined.
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Abe Yasuhiro
Kudo Ken
Watanabe Takashi
Advics Co., Ltd.
Nguyen Cuong H
Posz Law Group , PLC
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