Flame Propagation Studies in a Four-Valve Pentroof-Chamber Spark Ignition Engine

Paper #:
  • 922321

Published:
  • 1992-10-01
Citation:
Hu, Z., Whitelaw, J., and Vafidis, C., "Flame Propagation Studies in a Four-Valve Pentroof-Chamber Spark Ignition Engine," SAE Technical Paper 922321, 1992, https://doi.org/10.4271/922321.
Pages:
13
Abstract:
Heat release analysis, ion current and laser Doppler velocimetry methods are combined to examine the effect of pre-spark turbulent mixture motion on flame propagation and combustion characteristics in the four-valve pentroof combustion chamber of a spark ignition engine. Two inlet port configurations leading to different strengths of induction-generated tumbling vortices are considered with emphasis on lean mixture operation under partial load conditions. The results show a good correlation between mixture turbulent characteristics at ignition and flame development, flame propagation rate, combustion duration and cyclic variability. It is shown that turbulence enhancement through induction-generated tumble counterbalances the lean mixture ignition delay by enhancing the flame propagation speed, leading to extension of the engine lean operating limits.
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

Training / Education
2018-03-26