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The Effect of In-Cylinder Gas Flow on the Interpretation of the Ionization Sensor Signal

Franke, Axel LU ; Einewall, Patrik LU ; Johansson, Bengt LU ; Wickström, Nicholas; Reinmann, Raymond and Larsson, Anders (2003) In SAE Technical Papers
Abstract
The location of the peak pressure can serve as a control parameter to adjust ignition timing and optimize engine performance. The ionization sensor, an electrical probe for combustion diagnostics, can provide information about the peak pressure location. However, the reliability of such information is rather poor. In-cylinder gas flow at the electrodes may be one reason for this. We present results from an investigation of the relationship between ionization sensor current and pressure under various gas flow conditions. The gas flow velocity in the vicinity of the electrode gap was measured by LDA. From the results one may infer how the in-cylinder gas flow affects the reliability of the prediction of pressure peak location from the... (More)
The location of the peak pressure can serve as a control parameter to adjust ignition timing and optimize engine performance. The ionization sensor, an electrical probe for combustion diagnostics, can provide information about the peak pressure location. However, the reliability of such information is rather poor. In-cylinder gas flow at the electrodes may be one reason for this. We present results from an investigation of the relationship between ionization sensor current and pressure under various gas flow conditions. The gas flow velocity in the vicinity of the electrode gap was measured by LDA. From the results one may infer how the in-cylinder gas flow affects the reliability of the prediction of pressure peak location from the ionization sensor signal. One finding is that high bulk gas flow impairs the precision of the prediction in certain configurations. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Laser diagnostic Combustion engines Combustion physics
in
SAE Technical Papers
publisher
Society of Automotive Engineers
external identifiers
  • scopus:80055065267
language
English
LU publication?
yes
id
6219d2a7-1be6-4d67-bebb-d9cf14a28b6a (old id 707698)
alternative location
http://www.sae.org/technical/papers/2003-01-1120
date added to LUP
2007-12-07 14:07:48
date last changed
2017-09-10 04:58:21
@article{6219d2a7-1be6-4d67-bebb-d9cf14a28b6a,
  abstract     = {The location of the peak pressure can serve as a control parameter to adjust ignition timing and optimize engine performance. The ionization sensor, an electrical probe for combustion diagnostics, can provide information about the peak pressure location. However, the reliability of such information is rather poor. In-cylinder gas flow at the electrodes may be one reason for this. We present results from an investigation of the relationship between ionization sensor current and pressure under various gas flow conditions. The gas flow velocity in the vicinity of the electrode gap was measured by LDA. From the results one may infer how the in-cylinder gas flow affects the reliability of the prediction of pressure peak location from the ionization sensor signal. One finding is that high bulk gas flow impairs the precision of the prediction in certain configurations.},
  author       = {Franke, Axel and Einewall, Patrik and Johansson, Bengt and Wickström, Nicholas and Reinmann, Raymond and Larsson, Anders},
  keyword      = {Laser diagnostic
Combustion engines
Combustion physics},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE Technical Papers},
  title        = {The Effect of In-Cylinder Gas Flow on the Interpretation of the Ionization Sensor Signal},
  year         = {2003},
}