Landing gear bogie pitch trimmer
AssigneeAirbus Operations GmbH
InventorsArnaud Didey, James Barnes
Life of this patent
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Abstract
Disclosed is a landing gear bogie pitch trimmer, comprising a hydraulic actuator for adjusting a pitch of a landing gear bogie, in use, a fluid interface for receiving, from an aircraft hydraulic system external to the landing gear bogie pitch trimmer, hydraulic fluid for use in actuating the hydraulic actuator, and a flow control valve for controlling flow of the hydraulic fluid through the fluid interface in use. Also disclosed is a system, a landing gear controller, a method, and an aircraft.
Claims15
A landing gear bogie pitch trimmer, comprising:
- a hydraulic actuator for adjusting a pitch of a landing gear bogie, in use;
- a fluid interface for receiving, from an aircraft hydraulic system external to the landing gear bogie pitch trimmer, hydraulic fluid for use in actuating the hydraulic actuator;
- a flow control valve for controlling flow of the hydraulic fluid through the fluid interface in use;
- a gas-chargeable accumulator configured to be charged by a gas bottle;
- wherein the gas-chargeable accumulator is in fluid communication with the flow control valve;
- and
- wherein the gas-chargeable accumulator is configured to deliver the hydraulic fluid to the hydraulic actuator in use.
A system, comprising:
- a landing gear bogie pitch trimmer;
- and
- a hydraulic landing gear extension and retraction system for extending and retracting a landing gear upon which a landing gear bogie is mounted, the hydraulic landing gear extension and retraction system having a hydraulic fluid supply line;
- wherein the landing gear bogie pitch trimmer comprises:
- a hydraulic actuator for adjusting a pitch of the landing gear bogie, in use;
- a fluid interface for connection to the hydraulic fluid supply line of the hydraulic landing gear extension and retraction system for receiving hydraulic fluid for use in actuating the hydraulic actuator;
- a flow control valve for controlling flow of the hydraulic fluid through the fluid interface in use;
- a gas-chargeable accumulator configured to be charged by a gas bottle;
- wherein the gas-chargeable accumulator is in fluid communication with the flow control valve;
- and
- wherein the gas-chargeable accumulator is configured to deliver the hydraulic fluid to the hydraulic actuator in use.
A landing gear controller to control a flow control valve of a landing gear bogie pitch trimmer, the flow control valve for controlling flow of a hydraulic fluid through a fluid interface of the landing gear bogie pitch trimmer from an aircraft hydraulic system external to the landing gear bogie pitch trimmer, wherein the landing gear controller is configured to:
- determine, based on at least one predetermined criterion based on the characteristics a gas-chargeable accumulator configured to be charged by a gas bottle, to whether a flow of hydraulic fluid through the fluid interface is to be permitted by the flow control valve;
- and
- when it is determined that the flow of hydraulic fluid through the fluid interface is to be permitted, cause the flow control valve to be in an open position to permit flow of hydraulic fluid through the fluid interface.
Dependencies are inferred from the claim text.