Method and system for failure prediction using lubricating fluid analysis

Patent metadata

Field	Value
Publication number	US-10871476-B2
Application number	US-202016816717-A
Country	US
Kind code	B2
Filing date	Mar 12, 2020
Priority date	Oct 26, 2012
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

Methods and systems for failure prediction using analysis of oil or other lubricant. Raw data about feature(s) of each of a plurality of particles filtered from a fluid sample are used to categorize each particle into one of a plurality of categories, each category being defined by one or more of: chemical composition, size and morphology. Particle physical characteristics in each category are quantified to obtain a set of categorized data. The categorized data are compared with historical data. Results of the comparing are evaluated to generate a prediction of any failure or mechanism of failure.

First claim

What is claimed is:

1. A method for generating a failure prediction for an engine of an engine type, the method comprising:
receiving filtered particles filtered from lubricating fluid of the engine;
using X-ray spectroscopy, analyzing the filtered particles and producing raw data relating to the filtered particles, the raw data including chemical compositions of individual filtered particles;
using one or more processors and the raw data:
categorizing individual particles into categories to generate categorized data, at least one category being defined by a chemical composition zone within a three-chemical-element system;
comparing the categorized data with historical data associated with the engine type;
generating the failure prediction based on the comparison and predefined rules, the failure predication being indicative of one or both of the following: when the engine is expected to fail and a mechanism of failure of the engine; and
generating an output indicative of the failure prediction.

2. The method of claim 1 , wherein the raw data includes sizes and morphologies of individual filtered particles.

3. The method of claim 1 , wherein the filtered particles include particles smaller than about 30 μm in diameter.

4. The method of claim 1 , wherein the filtered particles include particles having a size between 0.5 μm and 1600 μm in diameter.

5. The method of claim 1 , wherein at least one category is defined according to a particle source.

6. The method of claim 1 , wherein the comparison comprises at least one of a calculation of deviation of the categorized data from the historical data, and a calculation of variation of the categorized data from the historical data.

7. The method of claim 1 , wherein the comparison comprises at least one of a comparison of the categorized data in each category to the historical data, and a comparison of a composite of the categorized data to the historical data.

8. The method of claim 1 , wherein the failure prediction is indicative of premature wear of a component of the engine.

9. The method of claim 1 , wherein using X-ray spectroscopy includes using X-ray fluorescence.

10. The method of claim 1 , comprising filtering out the plurality of particles from a sample of the lubricating fluid wherein the sample has a volume of 25 ml or less.

11. The method of claim 1 , wherein the the plurality of particles includes at least 1000 particles.

12. The method of claim 1 , comprising generating the failure prediction based on a number of particles in one of the categories.

13. The method of claim 1 , comprising generating the failure prediction based on a number of particles in the chemical composition zone.

14. The method of claim 1 , wherein the filtered particles include non-metallic particles and the raw data includes data relating to the non-metallic particles.

Assignees

• Pratt & Whitney Canada

Inventors

• Jean Maurice
• Meilleur Daniel

Classifications

• G01N33/2858 Primary

  Metal particles · CPC title

• F01M2011/14

  for indicating the necessity to change the oil · CPC title

• F02D41/22

  Safety or indicating devices for abnormal conditions {(in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809)} · CPC title

• Y02T10/40

  Engine management systems · CPC title

• G06F15/00

  Digital computers in general (details G06F1/00 – G06F13/00); Data processing equipment in general · CPC title