Control apparatus for four-wheel drive vehicle

Details Control apparatus for four-wheel drive vehicle Control apparatus for four-wheel drive vehicle

1986-12-29

1987-12-15

Love, John J.

Motor vehicles

With means for detecting wheel slip during vehicle...

180249, B60T 810

Patent

active

047126353

ABSTRACT:
The coefficient of friction of a road surface lying ahead of a four-wheel drive vehicle is predicted and, if control performed on the basis of the prediction is incorrect, the coefficient of friction of the road surface actually traversed by the vehicle is calculated, thereby revising the prediction so that the next prediction of coefficient of friction will be more accurate. Accordingly, control for changeover between two- and four-wheel drive or for locking a center differential mechanism can be made to conform to the road surface conditions immediately and in an appropriate manner to prevent skidding or lock-up of the tires and, hence, assure a safe and stable traveling state.

REFERENCES:
patent: 4346774 (1982-08-01), Hirota et al.
patent: 4552241 (1985-11-01), Suzuki
patent: 4595072 (1986-06-01), Barnea

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