Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1988-05-16
1989-04-04
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
303 99, 303103, 303106, 303109, 36442602, B60T 832, B60T 870, B60T 880
Patent
active
048180378
ABSTRACT:
A method for estimating vehicle reference speed and acceleration utilizing an adaptive filter for providing periodically updated reference values given by a currently extrapolated value plus a correction term which is a function of current wheel slip, wheel acceleration and wheel velocity. The method may be successfully employed over a wide range of road friction coefficients and may be used for traction control as well as anti-skid braking, since the approach does not assure a fixed limiting wheel acceleration. The method avoids the necessity of maintaining low slip values on preselected wheels in order to obtain suitable reference speed values.
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Butler Douglas C.
Hughes Aircraft Company
Karambelas A. W.
Meltzer M. J.
Mitchell S. M.
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