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Spark Ignition - Searching for the Optimal Spark Profile

Ängeby, Jakob ; Saha, Anupam LU ; Lundgren, Marcus LU and Björnsson, Ola LU (2022) 9th International Engine Congress p.1-17
Abstract
The impact of different spark designs on the ignition and combustion
stability is studied using a 13-liter CNG fueled heavy duty spark ignited engine
to search for the “optimal” spark design. Experimental results show that robust
ignition can be achieved using a significantly shorter spark duration and lower
energy than expected. A capacitive discharge ignition (CDI) system enabled to
separately control the available spark voltage, current and duration (FlexiSpark®
CDI) was compared to a standard CDI system without spark control and an inductive discharge (IDI) ignition system. Typically, a robust ignition can be provided using only 5% of the spark duration and 17% of the spark energy compared to that required... (More)
The impact of different spark designs on the ignition and combustion
stability is studied using a 13-liter CNG fueled heavy duty spark ignited engine
to search for the “optimal” spark design. Experimental results show that robust
ignition can be achieved using a significantly shorter spark duration and lower
energy than expected. A capacitive discharge ignition (CDI) system enabled to
separately control the available spark voltage, current and duration (FlexiSpark®
CDI) was compared to a standard CDI system without spark control and an inductive discharge (IDI) ignition system. Typically, a robust ignition can be provided using only 5% of the spark duration and 17% of the spark energy compared to that required by an IDI system to accomplish an equivalent ignition and combustion stability. By applying control of the spark, a robust ignition can be provided which is optimized for the fuel, the engine design, the engine operating condition, and the condition of the spark plugs. This offers a potential to significantly reduce the spark-plug wear and the total cost of ownership without compromising engine performance.

The results are especially interesting in the view of Hydrogen fueled SI-ICE, where the required available spark voltage is high, but the required spark energy is low. It is desirable to use a spark design with just enough voltage and power to initiate a sustainable combustion, but with minimal energy not to excessively wear and heat the spark plug electrodes to avoid pre-ignition. (Less)
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author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
in press
subject
keywords
spark ignition, Ignitability, Internal combusiton engines, Renewable fuels, CNG, Biogas
host publication
9th International Engine Congress 2022
pages
18 pages
conference name
9th International Engine Congress
conference location
Baden Baden, Germany
conference dates
2022-02-22 - 2022-02-23
language
English
LU publication?
yes
id
012ffeeb-00a6-48bb-afbf-9d21a8380540
date added to LUP
2022-07-20 13:04:20
date last changed
2022-08-03 14:27:51
@inproceedings{012ffeeb-00a6-48bb-afbf-9d21a8380540,
  abstract     = {{The impact of different spark designs on the ignition and combustion <br/>stability is studied using a 13-liter CNG fueled heavy duty spark ignited engine <br/>to search for the “optimal” spark design. Experimental results show that robust <br/>ignition can be achieved using a significantly shorter spark duration and lower <br/>energy than expected. A capacitive discharge ignition (CDI) system enabled to <br/>separately control the available spark voltage, current and duration (FlexiSpark®<br/>CDI) was compared to a standard CDI system without spark control and an inductive discharge (IDI) ignition system. Typically, a robust ignition can be provided using only 5% of the spark duration and 17% of the spark energy compared to that required by an IDI system to accomplish an equivalent ignition and combustion stability. By applying control of the spark, a robust ignition can be provided which is optimized for the fuel, the engine design, the engine operating condition, and the condition of the spark plugs. This offers a potential to significantly reduce the spark-plug wear and the total cost of ownership without compromising engine performance.<br/><br/>The results are especially interesting in the view of Hydrogen fueled SI-ICE, where the required available spark voltage is high, but the required spark energy is low. It is desirable to use a spark design with just enough voltage and power to initiate a sustainable combustion, but with minimal energy not to excessively wear and heat the spark plug electrodes to avoid pre-ignition.}},
  author       = {{Ängeby, Jakob and Saha, Anupam and Lundgren, Marcus and Björnsson, Ola}},
  booktitle    = {{9th International Engine Congress 2022}},
  keywords     = {{spark ignition; Ignitability; Internal combusiton engines; Renewable fuels; CNG; Biogas}},
  language     = {{eng}},
  pages        = {{1--17}},
  title        = {{Spark Ignition - Searching for the Optimal Spark Profile}},
  url          = {{https://lup.lub.lu.se/search/files/121709792/Spark_Ignition_Searching_for_the_Optimal_Spark_Profile.pdf}},
  year         = {{2022}},
}