Plug Fouling Investigations on a Running Engine - An Application of a Novel Multi-Purpose Diagnostic System Based on the Spark Plug

Paper #:
  • 912318

Published:
  • 1991-10-01
Citation:
Collings, N., Dinsdale, S., and Hands, T., "Plug Fouling Investigations on a Running Engine - An Application of a Novel Multi-Purpose Diagnostic System Based on the Spark Plug," SAE Technical Paper 912318, 1991, https://doi.org/10.4271/912318.
Pages:
8
Abstract:
A method for non-intrusive measurement of spark plug fouling, burn quality, pre-ignition and spark characteristics is described. The technique relies on a continuous monitoring of the leakage current to the spark plug centre electrode, via a high voltage diode stand off arrangement. By way of demonstration, the system operation is reported for investigations of cold start plug fouling.
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