Patent ID: 8352200
Filing Date: 2013-01-08
Classification: B01D

Abstract:
1. A system for monitoring a filter used for filtering a fluid in an aircraft engine, comprising: pressure measurement means for acquiring over time a differential pressure of the fluid through the filter; temperature measurement means for acquiring over time a temperature of the fluid through the filter; computing means for computing a current viscosity value of the fluid depending on its temperature; computing means for computing a current flow rate value of the fluid depending on the engine speed; computing means for computing a normalized differential pressure, under reference conditions by normalizing the differential pressure measured as a function of the conditions for exploiting the fluid, the fluid exploitation conditions used for normalizing the differential pressure including said current viscosity value and said current flow rate value; storage means for storing in memory a predetermined reference clogging curve describing a time-dependent change of the normalized differential pressure depending on a pollutant mass injected into the filter; computing means for estimating the pollutant mass injected into the filter by projecting a current value of said normalized differential pressure onto said reference clogging curve; and computing means for generating from said estimated pollutant mass a set of signatures defining the condition and the time-dependent change of clogging of the filter.