Method and system for deriving wheel rotation speed data for aut

Details Method and system for deriving wheel rotation speed data for aut Method and system for deriving wheel rotation speed data for aut

1984-04-17

1988-01-05

Chin, Gary

Boots, shoes, and leggings

364565, 303 95, B60K 834

Patent

active

047180137

ABSTRACT:
An anti-skid control system for automotive hydraulic brakes screens out clearly erroneous sensor signals and/or values derived directly from sensor signals and used as anti-skid control parameters. Values for wheel speed, wheel acceleration and other brake-related factors are derived from a wheel rotation sensor signal. When the difference between successively derived wheel speed values exceeds a predetermined value, thus indicating a level of wheel acceleration which can only be an artifact due to an erroneous sensor reading, the latter wheel speed value is replaced with a back-up value. The back-up value is chosen to approximate the actual wheel speed as closely as possible, either by using the previously derived, and presumably accurate, wheel speed value or by adding to the latter a factor projecting the wheel acceleration.

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