Real-time identification of maximum tire-road friction...

Details Real-time identification of maximum tire-road friction... Real-time identification of maximum tire-road friction...

2008-11-21

2011-11-08

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Indication or control of braking, acceleration, or deceleration

C303S150000

Reexamination Certificate

active

08055424

ABSTRACT:
A method for estimating the maximum tire/road surface coefficient of friction for a vehicle that includes actively inducing a small amount of acceleration or deceleration to the front wheels or the rear wheels of the vehicle and inducing a corresponding and opposite amount of acceleration or deceleration to the other of the front wheels or the rear wheels of the vehicle so that the acceleration and deceleration cancel each other and the perceived speed of the vehicle does not change. The tire/road surface coefficient of friction and a wheel-slip ratio can be used to determine a road surface condition.

REFERENCES:
patent: 6023649 (2000-02-01), Matsuura et al.
patent: 2003/0078717 (2003-04-01), Kawasaki et al.
patent: 2005/0102086 (2005-05-01), Nakao
patent: 2007/0061061 (2007-03-01), Salman et al.

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