Electro-hydraulic braking system for the wheels of an aircraft

Details Electro-hydraulic braking system for the wheels of an aircraft Electro-hydraulic braking system for the wheels of an aircraft

1994-03-08

1995-03-14

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Multiple systems

188106P, 244111, 3031135, B60T 1121, B64C 2546

Patent

active

053971736

ABSTRACT:
The invention relates to an electro-hydraulic braking system for the wheels of aircraft landing gear. The system comprises two hydraulic pressure sources each feeding a hydraulic circuit that leads to the brakes of two groups of wheels via a single braking control stage. A circuit connects either a solenoid valve electrically controlled by the control unit or else a double metering valve mechanically controlled by the brake pedals via two shuttle valves, to one inlet of each control stage. A second circuit directly connects a solenoid valve to a second inlet of each of said control stages. Each control stage includes two symmetrical internal circuits having one servo-valve per corresponding brake, which servo-valves are cross-connected by means of a respective corresponding controlled valve. In the event of one of the circuits breaking down, the servo-valves associated with the other circuit then serve, after automatic reconfiguration, also to provide braking and anti-skid control in a paired tandem mode.

REFERENCES:
patent: 3926479 (1975-12-01), Bissell et al.
patent: 4640475 (1987-02-01), Zoerb
patent: 4685748 (1987-08-01), Zoerb
patent: 4792192 (1988-12-01), Tveitane
patent: 4834465 (1989-05-01), Guichard et al.
patent: 4923056 (1990-05-01), Nedelk
patent: 5024491 (1991-06-01), Pease et al.
patent: 5050940 (1991-09-01), Bedford et al.

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