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

Paper #:
  • 2016-01-0796

Published:
  • 2016-04-05
DOI:
  • 10.4271/2016-01-0796
Citation:
Shah, A., Tunestal, P., and Johansson, B., "Scalability Aspects of Pre-Chamber Ignition in Heavy Duty Natural Gas Engines," SAE Technical Paper 2016-01-0796, 2016, doi:10.4271/2016-01-0796.
Pages:
13
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 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.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2004-06-08
Technical Paper / Journal Article
2004-11-16