Nanoparticle measurements used to detect an engine oil control ring failure

J. Swanson, A. Ragatz, W. Watts, D. Kittelson, R. Winsor

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A cyclic variation in total particle number concentration was observed while making routine exhaust emission measurements. Many dilution and engine operating conditions were examined and, by sequentially shutting down individual cylinders, the problem was traced to cylinder 2. The engine was disassembled and piston 2's oil control ring was found to be fractured. Replacement of the ring eliminated the particle concentration fluctuation. This paper presents the results of experimental measurements made to determine the cause of the irregular emissions.

Original languageEnglish (US)
Pages (from-to)1071-1076
Number of pages6
JournalProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Issue number8
StatePublished - Aug 1 2009


  • Diesel emissions
  • Engine maintenance
  • Oil consumption
  • Particle measurements
  • Piston ring


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