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US 10,703,464 B2Granted
Architecture for locked wheel and antiskid performance
AssigneeGoodrich Corporation
InventorsMarc Georgin, Michael Kordik
Life of this patent
Estimating the term…
Abstract
Braking control systems and methods, such as for an aircraft, use a dump valve to rapidly decrease hydraulic pressure applied to a brake actuator during a wheel skid condition. In response to the wheel speed recovering, the dump valve is commanded closed and the brake control system returns to normal braking. The dump valve and a servo-valve may work harmoniously for locked wheel brake control.
Claims19
A brake control system, comprising:
- a non-transitory memory configured to store instructions;
- and
- a controller in electronic communication with the memory, the controller configured to:
- control a shutoff valve, wherein the shutoff valve is configured to receive a hydraulic fluid pressure via a primary hydraulic line;
- control a servo valve, wherein the servo valve is configured to receive the hydraulic fluid pressure from the shutoff valve via an intermediate hydraulic line, and further configured to transmit the hydraulic fluid pressure to a brake actuator via a third hydraulic line to apply a braking force to a wheel;
- determine whether a locked wheel condition is detected;
- command a dump valve to open in response to the locked wheel condition being detected to release the hydraulic fluid pressure from the third hydraulic line into a return line via the dump valve, wherein the servo valve and the dump valve are connected in parallel between the third hydraulic line and the return line;
- determine whether a wheel speed has recovered;
- and
- command the dump valve closed in response to the wheel speed being recovered.
7 more elements
A brake control system, comprising:
- a brake control module, comprising:
- a shutoff valve configured to receive a hydraulic fluid pressure via a primary hydraulic line;
- a servo valve configured to receive the hydraulic fluid pressure from the shutoff valve via an intermediate hydraulic line and configured to provide the hydraulic fluid pressure to apply braking force to a wheel via a third hydraulic line;
- and
- a dump valve in fluid communication with the third hydraulic line, wherein the dump valve is configured to be actuated to an open position in response to a locked wheel condition being detected to release the hydraulic fluid pressure from the third hydraulic line into a return line via the dump valve, wherein the servo valve and the dump valve are connected in parallel between the third hydraulic line and the return line.
2 more elements
A method for locked wheel brake control, comprising:
- controlling a shutoff valve, wherein the shutoff valve is configured to receive a hydraulic fluid pressure via a primary hydraulic line;
- controlling a servo valve, wherein the servo valve is configured to receive the hydraulic fluid pressure from the shutoff valve via an intermediate hydraulic line, and further configured to transmit the hydraulic fluid pressure to a brake actuator via a third hydraulic line to apply a braking force to a wheel;
- determining whether a locked wheel condition is detected;
- commanding a dump valve open in response to the locked wheel condition being detected to release the hydraulic fluid pressure from the third hydraulic line into a return line via the dump valve, wherein the servo valve and the dump valve are connected in parallel between the third hydraulic line and the return line;
- determining whether a wheel speed has recovered;
- and
- commanding the dump valve closed in response to the wheel speed being recovered.
4 more elements
Dependencies are inferred from the claim text.