Method and system for detecting wheel slippage

Details Method and system for detecting wheel slippage Method and system for detecting wheel slippage

1986-10-14

1991-04-23

Hill, Mitchell J.

Motor vehicles

With means for detecting wheel slip during vehicle...

3644241, B60K 2816

Patent

active

050092790

ABSTRACT:
A method and a system derive a value representative of an actual vehicle speed in strict correspondence to actual vehicle speed. The value can be utilized to detect wheel slippage and allows precise traction control, anti-skid brake control and so forth. The method for deriving wheel slippage, according to the present invention, includes a step of deriving a projected vehicle speed, the rate of change of which varies with road surface friction. Wheel slippage is derived from on the projected vehicle speed and instantaneous wheel speed. In practice, the method includes a step for detecting the force exerted on a vehicular wheel, which force includes a resistance variable depending upon the road surface friction .mu.. Based on the detected force, the projected vehicle speed variation pattern is derived so as to derive an instantaneous projected vehicle speed.

REFERENCES:
patent: 3776357 (1973-12-01), Arai et al.
patent: 4075538 (1978-02-01), Plunkett
patent: 4538700 (1985-09-01), Suzuki
patent: 4562541 (1985-12-01), Sakakiyama
patent: 4625824 (1986-12-01), Leiber
patent: 4637487 (1987-01-01), Nakamura et al.

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