System and method of determining remaining useful life of an air filter
AssigneeCaterpillar Inc.
InventorsRichard Carpenter, Shawn Ryon, Phil Spengler, Shaobin Liu, Stephen Morey
Life of this patent
Estimating the term…
Abstract
A method for estimating a remaining useful life of an air filter. The method includes determining, at a controller of a machine, a delta pressure of the air filter in the machine based on an input from a plurality of sensors. The method includes determining a percent plugged of the filter based upon a non-linear relationship between the delta pressure and the percent plugged of the air filter. The method includes estimating the remaining useful life of the filter based upon the percent plugged.
Claims20
A method for estimating a remaining useful life of an air filter in a machine, the method comprising the steps of:
- determining, at a controller, a measured delta pressure (ΔPmeas) of the air filter in the machine based on an input from one or more sensors;
- determining, at the controller, a new air filter delta pressure (ΔP0) of the air filter in the machine at a given set of machine operating parameters;
- generating, at the controller, a new air filter delta pressure (ΔP0) model for the air filter in the machine, based upon the new air filter delta pressure (ΔP0) across a range of a single variable (such as mass air flow) and at the given set of machine operating parameters;
- calculating, at the controller, a normalized delta P (ΔPnorm) based upon the new air filter delta pressure (ΔP0), the measured delta pressure (ΔPmeas), a plugged filter delta pressure (ΔP100), and a maximum new air filter delta pressure (max ΔP0);
- calculating, at the controller, a percent plugged (θ) of the air filter based upon the normalized delta P (ΔPnorm) to generate a linearized percent plugged model 302;
- calculating, at the controller, a total filter usage hours (t);
- determining, at the controller, a contamination rate (θ′) of the filter based on the total filter usage hours (t) and the percent plugged (θ);
- generating, at the controller, a remaining useful life (RUL) of the air filter based on the contamination rate (θ′);
- and
- transmitting, from the controller, the remaining useful life (RUL) of the air filter to a display 110.
A system for estimating a remaining useful life of an air filter, the system comprising an electronic control module coupled to a display, the electronic control module operatively coupled to a plurality of sensors and configured to:
- determine a measured delta pressure (ΔPmeas) of the air filter in the machine based on an input from one or more sensors;
- determine a new air filter delta pressure (ΔP0) of the air filter in the machine at a given set of machine operating parameters;
- generate a new air filter delta pressure (ΔP0) model for the air filter in the machine, based upon the new air filter delta pressure (ΔP0) across a range of a single variable and at the given set of machine operating parameters;
- calculate a normalized delta P (ΔPnorm) based upon the new air filter delta pressure (ΔP0), the measured delta pressure (ΔPmeas), a plugged filter delta pressure (ΔP100), and a maximum new air filter delta pressure (max ΔP0);
- calculate a percent plugged (θ) of the air filter based upon the normalized delta P (ΔPnorm) to generate a linearized percent plugged mode;
- calculate a total filter usage hours (t);
- determine a contamination rate (θ′) of the filter based on the total filter usage hours (t) and the percent plugged (θ);
- generate a remaining useful life (RUL) of the air filter based on the contamination rate (θ′) and
- transmit the remaining useful life (RUL) to a display.
Dependencies are inferred from the claim text.