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Applicability of Ionization Current Sensing Technique with Plasma Jet Ignition Using PreChamber Spark Plug in a Heavy Duty Natural Gas Engine

Shah, Ashish LU ; Tunestål, Per LU and Johansson, Bengt LU (2012) SAE 2012 International Powertrains, Fuels & Lubricants Meeting In [Host publication title missing]
Abstract
This article deals with study of ionization current sensing

technique's signal characteristics while operating with pre-chamber spark plug to achieve plasma jet ignition in a 6

cylinder 9 liter turbo-charged natural gas engine under EGR

and excess air dilution. Unlike the signal with conventional

spark plug which can be divided into distinct chemical and

thermal ionization peaks, the signal with pre-chamber spark

plug shows a much larger first peak and a negligible second

peak thereafter. Many studies in past have found the time of

second peak coinciding with the time of maximum cylinder

pressure and this correlation has been used as an input to

... (More)
This article deals with study of ionization current sensing

technique's signal characteristics while operating with pre-chamber spark plug to achieve plasma jet ignition in a 6

cylinder 9 liter turbo-charged natural gas engine under EGR

and excess air dilution. Unlike the signal with conventional

spark plug which can be divided into distinct chemical and

thermal ionization peaks, the signal with pre-chamber spark

plug shows a much larger first peak and a negligible second

peak thereafter. Many studies in past have found the time of

second peak coinciding with the time of maximum cylinder

pressure and this correlation has been used as an input to

combustion control systems but the absence of second peak

makes application of this concept difficult with pre-chamber

spark plug. However, it has been observed that the first peak

is very strong and does not deteriorate much even under lean

operation and hence ion current signal integral can be used to

calculate real time combustion stability parameters for

combustion control systems. The correlation between the

coefficient of variation (COV) of indicated mean effective

pressure (IMEP) and ion current integral for operation at 5,

12 and 18 bar IMEP load under stoichiometric and diluted

operation with EGR and excess air is presented in this article. (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 Engine, Natural Gas, Pre-chamber, Ignition
in
[Host publication title missing]
pages
11 pages
publisher
Society of Automotive Engineers
conference name
SAE 2012 International Powertrains, Fuels & Lubricants Meeting
external identifiers
  • other:2012-01-1632
  • scopus:84881197711
DOI
10.4271/2012-01-1632
project
Competence Centre for Combustion Processes
language
English
LU publication?
yes
id
0cb012fd-dac7-43c2-b1da-17fc620b8a6a (old id 4353331)
alternative location
http://papers.sae.org/2012-01-1632/
date added to LUP
2014-03-10 10:55:33
date last changed
2017-01-01 08:04:45
@inproceedings{0cb012fd-dac7-43c2-b1da-17fc620b8a6a,
  abstract     = {This article deals with study of ionization current sensing<br/><br>
technique's signal characteristics while operating with pre-chamber spark plug to achieve plasma jet ignition in a 6<br/><br>
cylinder 9 liter turbo-charged natural gas engine under EGR<br/><br>
and excess air dilution. Unlike the signal with conventional<br/><br>
spark plug which can be divided into distinct chemical and<br/><br>
thermal ionization peaks, the signal with pre-chamber spark<br/><br>
plug shows a much larger first peak and a negligible second<br/><br>
peak thereafter. Many studies in past have found the time of<br/><br>
second peak coinciding with the time of maximum cylinder<br/><br>
pressure and this correlation has been used as an input to<br/><br>
combustion control systems but the absence of second peak<br/><br>
makes application of this concept difficult with pre-chamber<br/><br>
spark plug. However, it has been observed that the first peak<br/><br>
is very strong and does not deteriorate much even under lean<br/><br>
operation and hence ion current signal integral can be used to<br/><br>
calculate real time combustion stability parameters for<br/><br>
combustion control systems. The correlation between the<br/><br>
coefficient of variation (COV) of indicated mean effective<br/><br>
pressure (IMEP) and ion current integral for operation at 5,<br/><br>
12 and 18 bar IMEP load under stoichiometric and diluted<br/><br>
operation with EGR and excess air is presented in this article.},
  author       = {Shah, Ashish and Tunestål, Per and Johansson, Bengt},
  booktitle    = {[Host publication title missing]},
  keyword      = {Internal Combustion Engine,Natural Gas,Pre-chamber,Ignition},
  language     = {eng},
  pages        = {11},
  publisher    = {Society of Automotive Engineers},
  title        = {Applicability of Ionization Current Sensing Technique with Plasma Jet Ignition Using PreChamber Spark Plug in a Heavy Duty Natural Gas Engine},
  url          = {http://dx.doi.org/10.4271/2012-01-1632},
  year         = {2012},
}