Front wheel- and rear wheel-drive vehicle and apparatus for dete

Details Front wheel- and rear wheel-drive vehicle and apparatus for dete Front wheel- and rear wheel-drive vehicle and apparatus for dete

1996-04-17

1998-11-24

Johnson, Brian L.

Motor vehicles

With means for detecting wheel slip during vehicle...

701 81, 180 652, B60K 2816

Patent

active

058395350

ABSTRACT:
Either the front wheels or the rear wheels of a front wheel- and rear wheel-drive vehicle are driven by an engine and the other thereof are driven by an electric motor. A detecting device detects a coefficient of friction on a road surface during running of the vehicle. Control circuit controls to operate the electric motor when the vehicle is subsequently started in a condition in which the coefficient of friction on the road surface is equal to or smaller than a predetermined value. The detecting device for detecting the coefficient of friction on the road surface is made up of a section for detecting the driving force of wheels to be driven by the engine, a section for detecting a slip ratio of the wheels, and a section for obtaining the coefficient of friction on the road surface based on a correlation between the driving force and the slip ratio.

REFERENCES:
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patent: 4470476 (1984-09-01), Hunt
patent: 4923025 (1990-05-01), Ellers
patent: 5126942 (1992-06-01), Matsuda
patent: 5164903 (1992-11-01), Lin et al.
patent: 5212640 (1993-05-01), Matsuda
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patent: 5249641 (1993-10-01), Sakata
patent: 5265020 (1993-11-01), Nakayama
patent: 5265694 (1993-11-01), Yamashita
patent: 5492192 (1996-02-01), Brooks et al.

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