Particle-Size Analysis of Engine Oils. A Supplement to Spectrometric Analysis.
Abstract
The Spectrometric Oil Analysis Program (SOAP) is a maintenance system used by the Air Force for continuous monitoring of engine oil samples. Total mass concentrations of various metals are measured to provide an indication of engine wear and to warn of impending malfunction; such data provide a basis for scheduling maintenance action in advanced of failure. Supplementary methods of analysis are sought with the objective of characterizing oil samples more completely so as to sharpen SOAP decision criteria and achieve improvements in reliability and cost effectiveness. One such technique is particle counting, which defines the size distribution of wear-metal particles and other debris if present. This report describes exploratory work which establishes a methodology for particle-size analysis of authentic engine oils and shows how the data can be applied for practical decision making. Indications are that the engine failure rate can be reduced to about 16% of its current level by supplementing each spectrometric analysis with a particle count. Instrumentation and technique are susceptible to automation which would permit the necessary particle size analysis is to be made routinely in a SOAP laboratory within three minutes per sample. An approach to the problems of realizing and exploiting this potential is outlined. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1980
- Accession Number
- ADA082230
Entities
People
- James A. Bierlein