| 摘要 |
PROBLEM TO BE SOLVED: To provide an estimating device for the degree of tire grip capable of enhancing the presumptive accuracy of the degree of tire grip when a load shift occurs to a vehicle wheel. SOLUTION: The presuming device for the degree of tire grip is equipped with a SAT estimator 16 to estimate the SAT of each front wheel, a slip angle computer 18 to presume the front wheel slip angle, a load change estimator 20 to estimate the load change of a steering wheel, a SAT model computer 22 to compute the SAT model value from the slip angle presumptive value and the load change, a braking/driving force estimator 24 to presume the braking/driving force generated on the braking/driving wheel to apply brakes or drive the vehicle, and a degree-of-grip estimator 26 to presume the degree of grip from the estimated SAT, the computed SAT model value, and the estimated braking/driving force. Because the degree of tire grip of the front wheel is estimated by estimating the load change of the steering wheel and computing the self-aligning torque model value using the load change to serve computing the self-aligning ratio, it is possible to enhance the estimation accuracy of the degree of grip in case that a load shift occurs to the vehicle wheel. COPYRIGHT: (C)2005,JPO&NCIPI
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