Snecma

Franck Godel

Nicolas Marie Pierre Gueit

Julien Marcel Roger Maille

Benoit Pontallier

Jean-Remi Andre Masse

Xavier Flandrois

Christian Aurousseau

Jonathan Benitah

Benoit Biraud

Mickael Sauzedde

Julien Maille

Nicolas Marie Gueit

Julien Marcel Maille

Jean-Rémi Masse

Benoît Pontallier

Mickaël Sauzedde

Benoît Biraud

After the control system has been started, which system has two control paths that are used as alternatives for delivering a control electric current to an electrohydraulic member for transforming said current into hydraulic power that is delivered to the actuator, and before powering a starter-generator of the engine, the detection method comprises implementing the following steps for each of the control paths in succession:

Method and a device for detecting an electrical failure affecting an electric control system of a hydraulic actuator of variable geometries of an aeroengine

A device and method of monitoring the measurement of a fuel flow rate fed to an airplane engine includes delivering the measurement from a mass flowmeter. The monitoring also includes evaluating whether at least the following conditions are satisfied: a signal delivered by the flowmeter is less than a given value; and the engine is running on its own. The measurement is invalidated if these conditions are satisfied simultaneously.

Method and a device for real time monitoring of a system for measuring a fuel flow rate

A method for monitoring a system for actuating variable geometries of a turbojet engine, the actuation system including a control device, a servovalve, and an actuator controlled by the servovalve, the control device configured to determine a control current according to a set position value and to a measured position of the actuator and to provide the control current to the servovalve. The monitoring method includes: detecting a stabilized condition; determining an average value of the control current during the detecting the stabilized condition; and comparing the average value with a predetermined threshold.

Method and device for monitoring a servovalve actuation system

A method of detecting a fault in a de-icer probe for measuring a physical parameter on an airplane engine, the method including: prior to starting an engine, measuring a first value of the physical parameter with help of the probe; activating the probe de-icer; at an end of a determined duration from a start of de-icing, measuring a second value of the parameter with help of the probe; and comparing the first and second values and generating a fault signal if the difference between the first and second values is less than a determined threshold.

Method of detecting a fault with the means for de-icing a probe for measuring a physical parameter

In a testing overspeed protection system: a) on receiving an order to start a turbomachine, an electronic regulation system (ERS) of the turbomachine sends an order to a control circuit of a fuel cutoff member to close the fuel cutoff member or to keep it in the closed position; b) the closed state of the FCM is verified on the basis of information transmitted to the ERS and representative of the position of the FCM; c) if the result of the verification in b) is positive, the ERS sends an order to the FCM control circuit to authorize opening of the FCM and enable the starting procedure to continue; and d) if the result of the verification in b) is negative, the ERS issues fault information concerning the overspeed protection system.

Method of testing a system for protecting a turbomachine against overspeed while starting

A device and method for monitoring a high-pressure pump in a turbomachine fuel supply circuit by detecting opening of a pressurizing and shut-off valve mounted on an outlet side of a fuel flow regulating valve, by measuring rotational speed of the turbomachine corresponding to the opening of the pressurizing and cut-off valve, and by monitoring change in a value of the rotational speed to propose replacement of the high-pressure pump when the measure value rotational speed reaches a predetermined threshold.

Monitoring of a high-pressure pump in a turbine engine fuel supply circuit

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Chartrettes, France

Franck Godel