Method and a device for real time monitoring of a system for measuring a fuel flow rate
AssigneeSnecma
InventorsFranck Godel, Nicolas Marie Pierre Gueit, Julien Marcel Roger Maille, Benoit Pontallier
Life of this patent
Estimating the term…
Abstract
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.
Claims8
A method of real time monitoring of a fuel flow rate measuring system for an airplane engine fitted with a mass flowmeter of an inductive type, the method comprising:
- evaluating continuously whether at least the following conditions are satisfied:
- a signal delivered by said flowmeter is less than a predetermined threshold value, and
- the engine is running on its own at a speed greater than a predetermined value;
- and
- invalidating the measurement delivered by said flowmeter if said conditions are satisfied simultaneously.
A monitoring installation for monitoring a fuel flow rate measuring system for an airplane engine fitted with a mass flowmeter of an inductive type, comprising:
- a combinatorial logic circuit of the additive type comprising:
- an input connected to comparator means receiving the signal from said flowmeter and comparing it with a predetermined threshold value, and
- an input receiving a signal representative of the speed of the engine running on its own,
- wherein the output from said combinatorial logic circuit is connected to means for at least signaling a failure of the flowmeter.
Dependencies are inferred from the claim text.