Advanced

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 In SAE Technical Papers
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.

(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
in
SAE Technical Papers
publisher
SAE International
conference name
SAE 2016 World Congress and Exhibition, 2016
external identifiers
  • scopus:84979231485
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
2017-05-10 13:25:28
@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},
  booktitle    = {SAE Technical Papers},
  language     = {eng},
  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},
}