Antilock control device

Details Antilock control device Antilock control device

1989-12-20

1991-05-14

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Pipeless valves

188181C, 303100, 303103, 303109, B60T 860

Patent

active

050150421

ABSTRACT:
An antilock control device is provided with sensors for sensing wheel speed of each of wheels mounted in the vehicle and a calculator for calculating a highest wheel speed, a second highest wheel speed and a lowest wheel speed. The calculator has a step for detecting a condition such that a difference between the second highest wheel speed and the lowest wheel speed is greater than a first threshold and, at the same time, a difference between the highest wheel speed and the second highest wheel speed is greater than a second threshold, and a step for counting a predetermined time period. When the condition is detected for a period longer that the predetermined time period, the wheel with the highest wheel speed is identified as a small diameter wheel which should be inhibited from being used for calculation of the estimated vehicle speed.

REFERENCES:
patent: 4787682 (1988-11-01), Muto
patent: 4802711 (1989-02-01), Muto et al.

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