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Scalability Aspects of Pre-Chamber Ignition in Heavy Duty Natural Gas Engines

Shah, Ashish LU ; Tunestål, Per LU and Johansson, Bengt LU (2016) SAE 2016 World Congress and Exhibition, 2016
Abstract

This article presents a study related to application of pre-chamber ignition system in heavy duty natural gas engine which, as previously shown by the authors, can extend the limit of fuel-lean combustion and hence improve fuel efficiency and reduce emissions. A previous study about the effect of pre-chamber volume and nozzle diameter on a single cylinder 2 liter truck-size engine resulted in recommendations for optimal pre-chamber geometry settings. The current study is to determine the dependency of those settings on the engine size. For this study, experiments are performed on a single cylinder 9 liter large bore marine engine with similar pre-chamber geometry and a test matrix of similar and scaled pre-chamber volume and nozzle... (More)

This article presents a study related to application of pre-chamber ignition system in heavy duty natural gas engine which, as previously shown by the authors, can extend the limit of fuel-lean combustion and hence improve fuel efficiency and reduce emissions. A previous study about the effect of pre-chamber volume and nozzle diameter on a single cylinder 2 liter truck-size engine resulted in recommendations for optimal pre-chamber geometry settings. The current study is to determine the dependency of those settings on the engine size. For this study, experiments are performed on a single cylinder 9 liter large bore marine engine with similar pre-chamber geometry and a test matrix of similar and scaled pre-chamber volume and nozzle diameter settings. The effect of these variations on main chamber ignition and the following combustion is studied to understand the scalability aspects of pre-chamber ignition. Indicated efficiency and engine-out emission data is also presented. It has been found that the performance of a pre-chamber is strongly affected by the size of the engine is it being used in. Even with the same energy content in the pre-chamber at the time of spark, the resulting initial main chamber heat release has been found to scale with engine size, and hence the optimal settings for pre-chamber volume and nozzle diameter are also found to scale with engine size.

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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
host publication
SAE Technical Papers
publisher
SAE International
conference name
SAE 2016 World Congress and Exhibition, 2016
conference location
Detroit, United States
conference dates
2016-04-12 - 2016-04-14
external identifiers
  • scopus:85017596034
DOI
10.4271/2016-01-0796
language
English
LU publication?
yes
id
cd6b94ff-5af4-46e3-8cbc-54661a25bfd2
date added to LUP
2017-02-16 13:50:22
date last changed
2019-01-06 12:57:24
@inproceedings{cd6b94ff-5af4-46e3-8cbc-54661a25bfd2,
  abstract     = {<p>This article presents a study related to application of pre-chamber ignition system in heavy duty natural gas engine which, as previously shown by the authors, can extend the limit of fuel-lean combustion and hence improve fuel efficiency and reduce emissions. A previous study about the effect of pre-chamber volume and nozzle diameter on a single cylinder 2 liter truck-size engine resulted in recommendations for optimal pre-chamber geometry settings. The current study is to determine the dependency of those settings on the engine size. For this study, experiments are performed on a single cylinder 9 liter large bore marine engine with similar pre-chamber geometry and a test matrix of similar and scaled pre-chamber volume and nozzle diameter settings. The effect of these variations on main chamber ignition and the following combustion is studied to understand the scalability aspects of pre-chamber ignition. Indicated efficiency and engine-out emission data is also presented. It has been found that the performance of a pre-chamber is strongly affected by the size of the engine is it being used in. Even with the same energy content in the pre-chamber at the time of spark, the resulting initial main chamber heat release has been found to scale with engine size, and hence the optimal settings for pre-chamber volume and nozzle diameter are also found to scale with engine size.</p>},
  author       = {Shah, Ashish and Tunestål, Per and Johansson, Bengt},
  language     = {eng},
  location     = {Detroit, United States},
  publisher    = {SAE International},
  title        = {Scalability Aspects of Pre-Chamber Ignition in Heavy Duty Natural Gas Engines},
  url          = {http://dx.doi.org/10.4271/2016-01-0796},
  year         = {2016},
}