Investigation of Small Pilot Combustion in a Heavy-Duty Diesel Engine 2017-01-0718
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.
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. Download Citation
Author(s):
Carlos Jorques Moreno, Ola Stenlaas, Per Tunestal
Affiliated:
Scania CV AB, Lund University
Pages: 11
Event:
WCX™ 17: SAE World Congress Experience
ISSN:
1946-3936
e-ISSN:
1946-3944
Also in:
SAE International Journal of Engines-V126-3EJ, SAE International Journal of Engines-V126-3
Related Topics:
Diesel fuels
Combustion and combustion processes
Pressure
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
