Investigation of Small Pilot Combustion in a Heavy-Duty Diesel Engine

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Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
Factors influencing pilot-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel.
Combinations of pilot-injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases. An experiment was designed to investigate the factors influencing the combustion of the pilot. For improved injected fuel-mass accuracy, reference data for the injectors were measured in a spray rig prior to the engine experiments.
Results show that cycle-to-cycle variations and cylinder-to-cylinder variations influence pilot autoignition and the amount of heat released. Rail pressure and injected pilot mass affect the obtained variance depending on the chamber conditions. The obtained combustion modes (premixed, diffusive) of pilot combustion were found to be a function of the injected mass and rail pressure.
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DOI
https://doi.org/10.4271/2017-01-0718
Pages
11
Citation
Jorques Moreno, C., Stenlaas, O., and Tunestal, P., "Investigation of Small Pilot Combustion in a Heavy-Duty Diesel Engine," SAE Int. J. Engines 10(3):1193-1203, 2017, https://doi.org/10.4271/2017-01-0718.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-0718
Content Type
Journal Article
Language
English