Method and device for determining the air bleed on an aircraft turbojet engine
AssigneeSnecma
InventorsBruno Robert Gaully, Jerome Guy Roger Sebaa
Life of this patent
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Abstract
The device comprises first means for determining a pressure value relative to the pressure at the outlet of a precooler of an air bleed system and second means for calculating the air bleed level using this pressure value, said first means comprising means for calculating a first pressure value at the outlet of the precooler, using the pressure measured by a sensor, means for receiving a pressure measured by a second sensor, which represents a second pressure value at the outlet of the precooler and means for selecting one of said first and second pressure values, which is then transmitted to said second means for calculating said air bleed level.
Claims9
A method for determining an air bleed on an aircraft turbojet engine, carried out by an air bleed system comprising, in the direction of the air bleed:
- at least a first valve arranged on an air bleed duct on a high pressure compressor of the turbojet engine, with which a first pressure sensor is associated;
- a saturation valve arranged at an inlet of a precooler;
- said precooler;
- and a second pressure sensor, arranged at an outlet of the precooler, said second pressure sensor measuring a pressure at the outlet of the precooler and monitoring operation of the saturation valve, the method comprising:
- determining a pressure value relative to the pressure at the outlet of the precooler;
- and
- calculating an air bleed level using the determined pressure value,
- wherein, the determining the pressure value includes:
- calculating a first pressure value at the outlet of the precooler using the pressure measured by said first pressure sensor;
- receiving a pressure measured by said second pressure sensor, which represents a second pressure value at the outlet of the precooler;
- and
- selecting one of said first and second pressure values at the outlet of the precooler that is used for calculating said air bleed level.
A device for determining an air bleed on an aircraft turbojet engine, carried out by an air bleed system comprising, in the direction of the air bleed:
- at least a first valve arranged on an air bleed duct on a high pressure compressor of the turbojet engine, with which a first pressure sensor is associated;
- saturation valve arranged at an inlet of a precooler;
- said precooler;
- and a second pressure sensor, arranged at an outlet of the precooler, said second pressure sensor measuring a pressure at the outlet of the precooler and monitoring the operation of the saturation valve, said device comprising:
- first means configured for determining a pressure value relative to the pressure at the outlet of the precooler;
- and
- second means configured for calculating an air bleed level using the determined pressure value,
- wherein said first means comprise:
- means configured for calculating a first pressure value at the outlet of the precooler, using the pressure measured by said first pressure sensor, said first pressure value being limited to a predetermined value;
- means configured for receiving a pressure measured by said second pressure sensor, which represents a second pressure value at the outlet of the precooler;
- and
- means configured for selecting one of said first and second pressure values, which is transmitted to said second means for calculating said air bleed level.
Dependencies are inferred from the claim text.