Vehicle speed estimation using wheel speed measurements
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United States of America Patent
Stats
-
Oct 15, 1991
Grant Date -
N/A
app pub date -
Jan 25, 1990
filing date -
Jan 25, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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