Apparatus for calculating vehicle-wheel revolution values

Details Apparatus for calculating vehicle-wheel revolution values Apparatus for calculating vehicle-wheel revolution values

1989-04-17

1991-01-29

Black, Thomas G.

Boots, shoes, and leggings

36442602, 303 95, B60T 832, G06F 1520

Patent

active

049891650

ABSTRACT:
An apparatus for calculating vehicle-wheel revolution estimated values detects parameters such as the number of vehicle-wheel revolutions and vehicle-wheel revolution speeds, detects differences between the previous estimated values and the detected parameters or other parameters such as vehicle-wheel revolution speeds and accelerations calculated from the detected parameters, stores the differences at a predetermined rate, determines variations, and updates the estimated values based on the determined variations. Since the variations are determined so that the increase rate of the variations decreases as the accumulated values of the differences increase, lag time is minimized and at the same time noise is eliminated, thus precisely estimating the revolution values of the vehicle wheels. Antiskid control, traction control, and other controls can be effectively executed by using the estimated values even when the vehicle wheels move vertically on rough road surfaces or even when the vehicle wheels are eccentric. Consequently, the braking distance can be reduced, and the braking effects and the durability of control units are enhanced.

REFERENCES:
patent: 4672547 (1987-06-01), Masaki et al.
patent: 4718013 (1988-01-01), Kubo
patent: 4729608 (1988-03-01), Fennel et al.
patent: 4799178 (1989-01-01), Spadafora et al.
patent: 4811232 (1989-03-01), Hoashi
patent: 4836619 (1989-06-01), Muto

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