Effect of the Engine Head Geometry on the Combustion Process in a PFI Boosted Spark-ignition Engine

Event
SAE World Congress & Exhibition
Authors Abstract
Content
In this work, a boosted single-cylinder spark ignition port-fuel injection optical engine was used for the experimental activity. Firstly, it was equipped with a four-valve head of a commercial turbocharged multi-cylinder engine. Then a prototype engine head with flush installed intake valves was tested. The effect of the different head geometry was evaluated in closed intake valves fuel injection condition. High spatial resolution cycle-resolved digital imaging was used to characterise the flame propagation. Moreover, the presence of diffusion-controlled flames near the valves and on the cylinder walls was investigated. These flames induced the formation of unburned hydrocarbons and soot particles. The spatial distribution and temporal evolution of soot were evaluated by the two colour pyrometry. The prototype configuration showed higher combustion process efficiency than the standard one inducing a little increase in performance and a slight reduction in carbon oxides emissions. Moreover, a strong decrease in exhaust soot and unburned hydrocarbons was measured.
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DOI
https://doi.org/10.4271/2009-01-0504
Pages
9
Citation
Merola, S., Sementa, P., Tornatore, C., and Vaglieco, B., "Effect of the Engine Head Geometry on the Combustion Process in a PFI Boosted Spark-ignition Engine," SAE Int. J. Engines 2(1):289-297, 2009, https://doi.org/10.4271/2009-01-0504.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0504
Content Type
Journal Article
Language
English