Wheel behavior detecting system

Details Wheel behavior detecting system Wheel behavior detecting system

1988-07-07

1990-05-08

Black, Thomas G.

Boots, shoes, and leggings

303 95, 180197, B60T 832

Patent

active

049243969

ABSTRACT:
A traction control system, or an anti-lock brake system comprises a wheel behavior detecting system which comprises a coefficient calculating circuit for calculating, on the basis of output values from wheel speed detectors, a bad road coefficient A of representative of the road surface irregularity upon which the vehicle is moving, and a control variable filtering circuit for producing a filtered value Lm which exhibits a normal waveform when the bad road coefficient A is small and a filtered waveform when the bad road coefficient is great thereby keeping abrupt changes caused by the bad road from erroneously controlling the traction or antilock systems. With the wheel behavior detecting system used in the traction control system or the anti-lock brake system, a control command determining circuit responds to the output from the filtering circuit, that is, the control variable which has been modified, to determine the command necessary to control braking forces to be applied to the wheels.

REFERENCES:
patent: 3717384 (1973-02-01), Harned
patent: 4729608 (1988-03-01), Fennel et al.
patent: 4736994 (1988-04-01), Fennel et al.
patent: 4739484 (1988-08-01), von Zanten
patent: 4780818 (1988-10-01), Kubo
patent: 4794538 (1988-12-01), Cao et al.
patent: 4797825 (1989-01-01), Shimanuki et al.

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