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Experimental Evaluation of a Novel High Frequency Ignition System Using a Flow-Reactor Set-up

Dahlström, Jessica LU ; Schönborn, Alessandro LU ; Tunestål, Per LU and Johansson, Bengt LU (2013) SAE/KSAE , International Powertrains, Fuels & Lubricants Meeting, 2013
Abstract
Using diluted methane/air mixtures in internal combustion engines has a potential of reducing emissions and increasing efficiency. However, the ignition systems used today show difficulties igniting lean mixtures. For this purpose a new high frequency (HF) ignition system using pulse generators and a resonance circuit to achieve a controlled number of sparks during a controlled period of time has been developed. A first prototype of this high frequency system has been tested in a flow-reactor and compared to a conventional ignition system.



Results show that the high frequency system improves the flame development under lean conditions compared to the conventional system. Higher frequencies have higher capability of... (More)
Using diluted methane/air mixtures in internal combustion engines has a potential of reducing emissions and increasing efficiency. However, the ignition systems used today show difficulties igniting lean mixtures. For this purpose a new high frequency (HF) ignition system using pulse generators and a resonance circuit to achieve a controlled number of sparks during a controlled period of time has been developed. A first prototype of this high frequency system has been tested in a flow-reactor and compared to a conventional ignition system.



Results show that the high frequency system improves the flame development under lean conditions compared to the conventional system. Higher frequencies have higher capability of igniting lean mixtures than lower frequencies. Lower spark frequencies were found to travel faster across the electrodes than high frequencies and also compared to the conventional system. High pressure and high flow rates affected the lean limit of all ignition strategies, but especially high spark frequencies had difficulties igniting the charge under high pressures, due to the resonant frequency changing with pressure. The high frequency system was also limited in the amount of available voltage. However, this will be improved with further development of the ignition system. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Internal Combustion Engines, Ignition, Flow Reactor
host publication
SAE Technical Paper Series
publisher
Society of Automotive Engineers
conference name
SAE/KSAE , International Powertrains, Fuels & Lubricants Meeting, 2013
conference location
Soeul, Korea, Republic of
conference dates
2013-10-21 - 2013-10-23
external identifiers
  • other:2013-01-2564
  • scopus:84890339543
ISSN
0148-7191
DOI
10.4271/2013-01-2564
language
English
LU publication?
yes
id
c8c210d1-e765-495c-bf36-13122daeaeec (old id 4318393)
alternative location
http://papers.sae.org/2013-01-2564/
date added to LUP
2014-02-24 13:58:29
date last changed
2019-02-20 06:39:58
@inproceedings{c8c210d1-e765-495c-bf36-13122daeaeec,
  abstract     = {Using diluted methane/air mixtures in internal combustion engines has a potential of reducing emissions and increasing efficiency. However, the ignition systems used today show difficulties igniting lean mixtures. For this purpose a new high frequency (HF) ignition system using pulse generators and a resonance circuit to achieve a controlled number of sparks during a controlled period of time has been developed. A first prototype of this high frequency system has been tested in a flow-reactor and compared to a conventional ignition system.<br/><br>
<br/><br>
Results show that the high frequency system improves the flame development under lean conditions compared to the conventional system. Higher frequencies have higher capability of igniting lean mixtures than lower frequencies. Lower spark frequencies were found to travel faster across the electrodes than high frequencies and also compared to the conventional system. High pressure and high flow rates affected the lean limit of all ignition strategies, but especially high spark frequencies had difficulties igniting the charge under high pressures, due to the resonant frequency changing with pressure. The high frequency system was also limited in the amount of available voltage. However, this will be improved with further development of the ignition system.},
  author       = {Dahlström, Jessica and Schönborn, Alessandro and Tunestål, Per and Johansson, Bengt},
  issn         = {0148-7191},
  keyword      = {Internal Combustion Engines,Ignition,Flow Reactor},
  language     = {eng},
  location     = {Soeul, Korea, Republic of},
  publisher    = {Society of Automotive Engineers},
  title        = {Experimental Evaluation of a Novel High Frequency Ignition System Using a Flow-Reactor Set-up},
  url          = {http://dx.doi.org/10.4271/2013-01-2564},
  year         = {2013},
}