The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2023
Filed:
Jul. 31, 2020
Safran Power Units, Toulouse, FR;
David Francis Pierre Ormieres, Moissy-Cramayel, FR;
Louis Jean-Paul Fabien Perrot-Minot, Moissy-Cramayel, FR;
SAFRAN POWER UNITS, Toulouse, FR;
Abstract
An aircraft auxiliary power unit is equipped with a charging compressor. A method determines a surge parameter indicative of a risk that the charging compressor will display the phenomenon known as surge. A method and a system control a relief valve of this charging compressor. The method for determining the surge parameter includes calculating this surge parameter Ppomp as being the sum of a first term Tand of a second term Tthe first term Tbeing calculated on the basis of a first pressure Pmeasured downstream of a diffuser of the charging compressor, and of a second pressure Pmeasured upstream of the diffuser, the second term Tbeing calculated on the basis of a third pressure Pmeasured upstream of the diffuser and of an ambient pressure Psamb indicative of a pressure of an ambient environment.