Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1990-11-29
1993-01-05
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Pipeless valves
303 20, B60T 1722
Patent
active
051764296
ABSTRACT:
An improved failure detection circuit for anti-skid braking systems is disclosed. The failure detection circuit sends electrical test pulses to the individual valves which control the flow of pressurized brake fluid to the individual brakes and uses a feedback signal from these valves to determine a failure in any of these circuits. The failure detection circuit also includes a voltage monitoring circuit which monitors the voltage which is supplied to the anti-skid braking controller while applying an electrical load to the main power circuit for the controller such as by testing a plurality of valves at once. If the voltage drops below a minimum acceptable level, it indicates an actual or incipient failure of the main power supply circuit. This indication can be used to trigger a warning or to shut down the anti-skid braking system as can a detection of a failure in an individual circuit.
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patent: 3709567 (1973-01-01), Van Ostrom et al.
patent: 3874743 (1975-04-01), Fleischer et al.
patent: 3891279 (1975-06-01), Frait
patent: 4106820 (1978-08-01), Ruhnau et al.
patent: 4113321 (1978-09-01), Bleckmann
patent: 4661910 (1987-04-01), Reinecke et al.
patent: 4745542 (1988-05-01), Baba et al.
Hamada Toshihiro
Junichi Kaneko
Graham Matthew C.
Nissinbo Industries Inc.
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