Method for controlling a lifting jack for an aircraft engine nacelle, a jack-type lifting system implementing the method and the thus equipped nacelle
AssigneeAircelle
InventorsVincent LE COQ, Marc GEROME
Life of this patent
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Abstract
The jack-type lifting system includes a valve for modifying a maximum force value of a lifting jack activated by a protrusion for determining a determined portion such as the beginning of the extension stroke of the lifting jack. Thanks to the modification of the maximum force value, a pressure source thus applies the full force of the lifting jack after a start-up stroke so as to protect a lock of a reverser cowl which has been forgotten during maintenance.
Claims9
A method for controlling a lifting jack for a cowl of a turbojet engine nacelle, the lifting jack including an internal rod which slides inside an external rod, each rod being fitted with a piston at one end, said method comprising:
- a first step of reducing a value of a maximum force of the lifting jack at a beginning of an extension stroke of at least one of the internal or external rods;
- and
- a second step switching from a low maximum force value into a nominal maximum force value of the lifting jack by a control system when the extension stroke is beyond a start-up threshold stroke.
Dependencies are inferred from the claim text.