Method and system for monitoring the level of oil contained in a tank of an aircraft engine
First Claim
1. A method of monitoring a level of oil contained in a tank of an aircraft engine, the method comprising:
- for at least two predetermined operating stages of the engine, during at least one mission of the aircraft;
measuring, by an oil level sensor, a plurality of measurements of an oil level of the tank,measuring an oil temperature and an engine speed of rotation associated with each measurement of the oil level of the tank,storing, in a memory of a first computer, the measurements of the oil level of the tank and the associated oil temperature and associated engine speed of rotation, andselecting, using the first computer, measurements representative of oil level variations having both oil temperatures that are within a predetermined range of a reference temperature and engine speeds of rotation that are within a predetermined range of a reference speed of rotation corresponding to an iso-condition;
aggregating, using a second computer, only the measurements corresponding to the iso-condition selected over the operating stages during the at least one mission of the aircraft to produce a curve of the oil level of the tank; and
comparing, using the second computer, the curve produced by the aggregated measurements with reference data to identify abnormal oil consumption of the engine.
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Abstract
A method of monitoring oil level in a tank of an aircraft engine, including: for at least two predetermined operating stages of the engine, during at least one mission of the aircraft: obtaining a plurality of measurements of an oil level of the tank, each measurement being associated with an oil temperature and with an engine speed of rotation, and selecting measurements representative of oil level variations and associated with oil temperatures that are close to a reference temperature and with engine speeds of rotation that are close to a reference speed of rotation; aggregating the measurements selected over the operating stages and during the at least one mission of the aircraft; and comparing the aggregated measurements with reference data to identify abnormal oil consumption of the engine.
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Citations
13 Claims
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1. A method of monitoring a level of oil contained in a tank of an aircraft engine, the method comprising:
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for at least two predetermined operating stages of the engine, during at least one mission of the aircraft; measuring, by an oil level sensor, a plurality of measurements of an oil level of the tank, measuring an oil temperature and an engine speed of rotation associated with each measurement of the oil level of the tank, storing, in a memory of a first computer, the measurements of the oil level of the tank and the associated oil temperature and associated engine speed of rotation, and selecting, using the first computer, measurements representative of oil level variations having both oil temperatures that are within a predetermined range of a reference temperature and engine speeds of rotation that are within a predetermined range of a reference speed of rotation corresponding to an iso-condition; aggregating, using a second computer, only the measurements corresponding to the iso-condition selected over the operating stages during the at least one mission of the aircraft to produce a curve of the oil level of the tank; and comparing, using the second computer, the curve produced by the aggregated measurements with reference data to identify abnormal oil consumption of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A monitoring system for monitoring the oil level contained in a tank of an aeroengine, the system comprising:
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means that are activated for at least two predetermined operating stages of the engine during at least one mission of the aircraft; for measuring a plurality of measurements of an oil level of the tank, for measuring an oil temperature and an engine speed of rotation associated with each measurement of the oil level of the tank, and for selecting measurements representative of oil level variations having both oil temperatures within a predetermined range of a reference temperature and engine speeds of rotation that are within a predetermined range of a reference speed of rotation corresponding to an iso-condition; means for aggregating only the measurements corresponding to the iso-condition selected over the operating stages during the at least one mission of the aircraft to produce a curve of the oil level of the tank; and means for comparing the curve produced by the aggregated measurements with reference data in order to identify abnormal oil consumption of the engine. - View Dependent Claims (13)
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Specification