Vehicle speed estimation using wheel speed measurements

Details Vehicle speed estimation using wheel speed measurements Vehicle speed estimation using wheel speed measurements

1990-01-25

1991-10-15

Black, Thomas G.

Boots, shoes, and leggings

364565, 303100, B60T 860

Patent

active

050580191

ABSTRACT:
A vehicle speed estimation system estimates vehicle speed from wheel speed prior to an incipient wheel lockup condition. When an incipient wheel lockup condition is sensed, the estimated speed is increased by a determined amount and then decreased based on an estimated vehicle deceleration. The estimated vehicle deceleration during the incipient wheel lockup condition is based on wheel deceleration at a time preceding the time the incipient wheel lockup condition is sensed. When in incipient wheel lockup condition is sensed, a forgetting period during which wheel deceleration is not representative of vehicle deceleration is determined. The estimated vehicle deceleration during the incipient wheel lock condition is then based on wheel deceleration prior to the forgetting period.

REFERENCES:
patent: 4485545 (1984-11-01), Braschel
patent: 4673226 (1987-06-01), Every et al.
patent: 4755946 (1988-07-01), Lin
patent: 4783127 (1988-11-01), Kade et al.
patent: 4859002 (1989-08-01), Yoshino
patent: 4933858 (1990-06-01), Matsuda

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