Closed Loop Ignition Control by Ionization Current Interpretation

Paper #:
  • 970854

Published:
  • 1997-02-24
Citation:
Eriksson, L., Nielsen, L., and Glavenius, M., "Closed Loop Ignition Control by Ionization Current Interpretation," SAE Technical Paper 970854, 1997, https://doi.org/10.4271/970854.
Pages:
10
Abstract:
The main result of this paper is a real-time closed loop demonstration of spark advance control by interpretation of ionization current signals. The advantages of such a system is quantified. The ionization current, obtained by using the spark plug as a sensor, is rich on information, but the signal is also complex. A key step in our method is to use parameterized functions to describe the ionization current [1].The results are validated on a SAAB 2.3 1, normally aspirated, production engine, showing that the placement of the pressure trace relative to TDC is controlled using only the ionization current for feedback.
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