Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1992-10-26
1994-08-02
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Pipeless valves
303 97, 303100, 3031134, 36442602, B60T 872
Patent
active
053339428
ABSTRACT:
An anti-skid brake control system (9) for a wheeled vehicle has a conventional continuous source of pressurized hydraulic fluid, a hydraulically actuated wheel rotation braking device which responds via a wheel brake valve (11) to applied hydraulic pressure to apply a braking force to a wheel of the vehicle, and an operator actuatable control (10, 12, 39) for varying the supply of hydraulic pressure to the wheel rotation braking device. The system is responsive directly to the operator actuatable control (10, 12, 39) for determining the deceleration (14) currently commanded by the operator and further dynamically determines a maximum permissible wheel deceleration (47) at a given time. The operator controlled supply of hydraulic pressure to the braking device is overridden in the event that the deceleration (14) currently commanded by the operator exceeds the maximum permissible wheel deceleration. Maximum permissible wheel deceleration is dynamically determined by measuring the angular velocity (13) of the wheel, calculating the angular deceleration (51) of the wheel from the measured angular velocity (13), determining a maximum angular deceleration value (47) based on the measured angular velocity (13), determining the difference (53) between the calculated angular deceleration and the determined maximum angular deceleration, and modifying the determined maximum angular deceleration by a fraction of the determined difference (55) only if the determined maximum angular deceleration (47) is greater than the calculated angular deceleration (51). The braking force of the vehicle is controlled totally by the operator up to the point of an impending skid.
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Peczkowski Joseph L.
Suh Peter J.
Allied-Signal Inc.
McCormick Jr. Leo H.
Oberleitner Robert J.
Palguta Larry J.
Poon Peter M.
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